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[draw-buffers] First pass at overhauling Cogl's framebuffer management

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Cogl's support for offscreen rendering was originally written just to support
the clutter_texture_new_from_actor API and due to lack of documentation and
several confusing - non orthogonal - side effects of using the API it wasn't
really possible to use directly.

This commit does a number of things:
- It removes {gl,gles}/cogl-fbo.{c,h} and adds shared cogl-draw-buffer.{c,h}
  files instead which should be easier to maintain.
- internally CoglFbo objects are now called CoglDrawBuffers. A
  CoglDrawBuffer is an abstract base class that is inherited from to
  implement CoglOnscreen and CoglOffscreen draw buffers.  CoglOffscreen draw
  buffers will initially be used to support the
  cogl_offscreen_new_to_texture API, and CoglOnscreen draw buffers will
  start to be used internally to represent windows as we aim to migrate some
  of Clutter's backend code to Cogl.
- It makes draw buffer objects the owners of the following state:
  - viewport
  - projection matrix stack
  - modelview matrix stack
  - clip state
(This means when you switch between draw buffers you will automatically be
 switching to their associated viewport, matrix and clip state)

Aside from hopefully making cogl_offscreen_new_to_texture be more useful
short term by having simpler and well defined semantics for
cogl_set_draw_buffer, as mentioned above this is the first step for a couple
of other things:
- Its a step toward moving ownership for windows down from Clutter backends
  into Cogl, by (internally at least) introducing the CoglOnscreen draw
  buffer.  Note: the plan is that cogl_set_draw_buffer will accept on or
  offscreen draw buffer handles, and the "target" argument will become
  redundant since we will instead query the type of the given draw buffer
  handle.
- Because we have a common type for on and offscreen framebuffers we can
  provide a unified API for framebuffer management. Things like:
  - blitting between buffers
  - managing ancillary buffers (e.g. attaching depth and stencil buffers)
  - size requisition
  - clearing
This commit is contained in:
Robert Bragg 2009-09-25 14:34:34 +01:00
parent 6b2ff320ca
commit bb3a008318
30 changed files with 1474 additions and 1090 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
cogl/Makefile.am
View File

@ -120,6 +120,8 @@ libclutter_cogl_la_SOURCES = \
$(srcdir)/cogl-spans.c \
$(srcdir)/cogl-journal-private.h \
$(srcdir)/cogl-journal.c \
$(srcdir)/cogl-draw-buffer-private.h \
$(srcdir)/cogl-draw-buffer.c \
$(BUILT_SOURCES) \
$(NULL)

211
cogl/cogl-clip-stack.c
View File

@ -34,6 +34,7 @@
#include "cogl-primitives.h"
#include "cogl-context.h"
#include "cogl-internal.h"
#include "cogl-draw-buffer-private.h"
/* These are defined in the particular backend (float in GL vs fixed
in GL ES) */
@ -119,15 +120,24 @@ cogl_clip_push_window_rect (float x_offset,
float width,
float height)
{
CoglClipStackEntryWindowRect *entry;
CoglHandle draw_buffer;
CoglClipStackState *clip_state;
CoglClipStack *stack;
float v[4];
CoglClipStackEntryWindowRect *entry;
float viewport_height;
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
stack = (CoglClipStack *) ctx->clip.stacks->data;
/* We don't log clip stack changes in the journal so we must flush
* it before making modifications */
_cogl_journal_flush ();
cogl_get_viewport (v);
draw_buffer = _cogl_get_draw_buffer ();
clip_state = _cogl_draw_buffer_get_clip_state (draw_buffer);
stack = clip_state->stacks->data;
viewport_height = _cogl_draw_buffer_get_viewport_height (draw_buffer);
entry = g_slice_new (CoglClipStackEntryWindowRect);
@ -135,14 +145,14 @@ cogl_clip_push_window_rect (float x_offset,
* with (0,0) at bottom left. */
entry->type = COGL_CLIP_STACK_WINDOW_RECT;
entry->x0 = x_offset;
entry->y0 = v[3] - y_offset - height;
entry->y0 = viewport_height - y_offset - height;
entry->x1 = x_offset + width;
entry->y1 = v[3] - y_offset;
entry->y1 = viewport_height - y_offset;
/* Store it in the stack */
stack->stack_top = g_list_prepend (stack->stack_top, entry);
ctx->clip.stack_dirty = TRUE;
clip_state->stack_dirty = TRUE;
}
/* Scale from OpenGL <-1,1> coordinates system to window coordinates
@ -214,17 +224,26 @@ cogl_clip_push (float x_offset,
float width,
float height)
{
CoglClipStackEntryRect *entry;
CoglHandle draw_buffer;
CoglClipStackState *clip_state;
CoglClipStack *stack;
CoglClipStackEntryRect *entry;
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
/* We don't log clip stack changes in the journal so we must flush
* it before making modifications */
_cogl_journal_flush ();
/* Try and catch window space rectangles so we can redirect to
* cogl_clip_push_window_rect which will use scissoring. */
if (try_pushing_rect_as_window_rect (x_offset, y_offset, width, height))
return;
stack = (CoglClipStack *) ctx->clip.stacks->data;
draw_buffer = _cogl_get_draw_buffer ();
clip_state = _cogl_draw_buffer_get_clip_state (draw_buffer);
stack = clip_state->stacks->data;
entry = g_slice_new (CoglClipStackEntryRect);
@ -240,18 +259,27 @@ cogl_clip_push (float x_offset,
/* Store it in the stack */
stack->stack_top = g_list_prepend (stack->stack_top, entry);
ctx->clip.stack_dirty = TRUE;
clip_state->stack_dirty = TRUE;
}
void
cogl_clip_push_from_path_preserve (void)
{
CoglClipStackEntryPath *entry;
CoglHandle draw_buffer;
CoglClipStackState *clip_state;
CoglClipStack *stack;
CoglClipStackEntryPath *entry;
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
stack = (CoglClipStack *) ctx->clip.stacks->data;
/* We don't log clip stack changes in the journal so we must flush
* it before making modifications */
_cogl_journal_flush ();
draw_buffer = _cogl_get_draw_buffer ();
clip_state = _cogl_draw_buffer_get_clip_state (draw_buffer);
stack = clip_state->stacks->data;
entry = g_malloc (sizeof (CoglClipStackEntryPath)
+ sizeof (CoglPathNode) * (ctx->path_nodes->len - 1));
@ -268,7 +296,7 @@ cogl_clip_push_from_path_preserve (void)
/* Store it in the stack */
stack->stack_top = g_list_prepend (stack->stack_top, entry);
ctx->clip.stack_dirty = TRUE;
clip_state->stack_dirty = TRUE;
}
void
@ -279,16 +307,18 @@ cogl_clip_push_from_path (void)
cogl_path_new ();
}
void
cogl_clip_pop (void)
static void
_cogl_clip_pop_real (CoglClipStackState *clip_state)
{
gpointer entry;
CoglClipStack *stack;
gpointer entry;
CoglClipStackEntryType type;
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
/* We don't log clip stack changes in the journal so we must flush
* it before making modifications */
_cogl_journal_flush ();
stack = (CoglClipStack *) ctx->clip.stacks->data;
stack = clip_state->stacks->data;
g_return_if_fail (stack->stack_top != NULL);
@ -306,35 +336,57 @@ cogl_clip_pop (void)
stack->stack_top = g_list_delete_link (stack->stack_top,
stack->stack_top);
ctx->clip.stack_dirty = TRUE;
clip_state->stack_dirty = TRUE;
}
void
_cogl_clip_stack_rebuild (void)
cogl_clip_pop (void)
{
int has_clip_planes = cogl_features_available (COGL_FEATURE_FOUR_CLIP_PLANES);
CoglHandle draw_buffer;
CoglClipStackState *clip_state;
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
draw_buffer = _cogl_get_draw_buffer ();
clip_state = _cogl_draw_buffer_get_clip_state (draw_buffer);
_cogl_clip_pop_real (clip_state);
}
void
_cogl_flush_clip_state (CoglClipStackState *clip_state)
{
CoglClipStack *stack;
int has_clip_planes;
gboolean using_clip_planes = FALSE;
gboolean using_stencil_buffer = FALSE;
GList *node;
CoglClipStack *stack;
gint scissor_x0 = 0;
gint scissor_y0 = 0;
gint scissor_x1 = G_MAXINT;
gint scissor_y1 = G_MAXINT;
CoglMatrixStack *modelview_stack;
CoglMatrixStack *modelview_stack =
_cogl_draw_buffer_get_modelview_stack (_cogl_get_draw_buffer ());
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
modelview_stack = ctx->modelview_stack;
if (!clip_state->stack_dirty)
return;
/* The current primitive journal does not support tracking changes to the
* clip stack... */
_cogl_journal_flush ();
stack = (CoglClipStack *) ctx->clip.stacks->data;
/* XXX: the handling of clipping is quite complex. It may involve use of
* the Cogl Journal or other Cogl APIs which may end up recursively
* wanting to ensure the clip state is flushed. We need to ensure we
* don't recurse infinitely...
*/
clip_state->stack_dirty = FALSE;
ctx->clip.stack_dirty = FALSE;
ctx->clip.stencil_used = FALSE;
has_clip_planes = cogl_features_available (COGL_FEATURE_FOUR_CLIP_PLANES);
stack = clip_state->stacks->data;
clip_state->stencil_used = FALSE;
_cogl_disable_clip_planes ();
_cogl_disable_stencil_buffer ();
@ -433,74 +485,111 @@ _cogl_clip_stack_rebuild (void)
scissor_y1 - scissor_y0));
}
ctx->clip.stencil_used = using_stencil_buffer;
clip_state->stencil_used = using_stencil_buffer;
}
/* XXX: This should never have been made public API! */
void
cogl_clip_ensure (void)
{
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
CoglClipStackState *clip_state;
if (ctx->clip.stack_dirty)
_cogl_clip_stack_rebuild ();
clip_state = _cogl_draw_buffer_get_clip_state (_cogl_get_draw_buffer ());
_cogl_flush_clip_state (clip_state);
}
static void
_cogl_clip_stack_save_real (CoglClipStackState *clip_state)
{
CoglClipStack *stack;
/* We don't log clip stack changes in the journal so we must flush
* it before making modifications */
_cogl_journal_flush ();
stack = g_slice_new (CoglClipStack);
stack->stack_top = NULL;
clip_state->stacks = g_slist_prepend (clip_state->stacks, stack);
clip_state->stack_dirty = TRUE;
}
void
cogl_clip_stack_save (void)
{
CoglClipStack *stack;
CoglHandle draw_buffer;
CoglClipStackState *clip_state;
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
stack = g_slice_new (CoglClipStack);
stack->stack_top = NULL;
draw_buffer = _cogl_get_draw_buffer ();
clip_state = _cogl_draw_buffer_get_clip_state (draw_buffer);
ctx->clip.stacks = g_slist_prepend (ctx->clip.stacks, stack);
_cogl_clip_stack_save_real (clip_state);
}
ctx->clip.stack_dirty = TRUE;
static void
_cogl_clip_stack_restore_real (CoglClipStackState *clip_state)
{
CoglClipStack *stack;
g_return_if_fail (clip_state->stacks != NULL);
/* We don't log clip stack changes in the journal so we must flush
* it before making modifications */
_cogl_journal_flush ();
stack = clip_state->stacks->data;
/* Empty the current stack */
while (stack->stack_top)
_cogl_clip_pop_real (clip_state);
/* Revert to an old stack */
g_slice_free (CoglClipStack, stack);
clip_state->stacks = g_slist_delete_link (clip_state->stacks,
clip_state->stacks);
clip_state->stack_dirty = TRUE;
}
void
cogl_clip_stack_restore (void)
{
CoglClipStack *stack;
CoglHandle draw_buffer;
CoglClipStackState *clip_state;
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
g_return_if_fail (ctx->clip.stacks != NULL);
draw_buffer = _cogl_get_draw_buffer ();
clip_state = _cogl_draw_buffer_get_clip_state (draw_buffer);
stack = (CoglClipStack *) ctx->clip.stacks->data;
/* Empty the current stack */
while (stack->stack_top)
cogl_clip_pop ();
/* Revert to an old stack */
g_slice_free (CoglClipStack, stack);
ctx->clip.stacks = g_slist_delete_link (ctx->clip.stacks,
ctx->clip.stacks);
ctx->clip.stack_dirty = TRUE;
_cogl_clip_stack_restore_real (clip_state);
}
void
_cogl_clip_stack_state_init (void)
_cogl_clip_stack_state_init (CoglClipStackState *clip_state)
{
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
ctx->clip.stacks = NULL;
ctx->clip.stack_dirty = TRUE;
clip_state->stacks = NULL;
clip_state->stack_dirty = TRUE;
/* Add an intial stack */
cogl_clip_stack_save ();
_cogl_clip_stack_save_real (clip_state);
}
void
_cogl_clip_stack_state_destroy (void)
_cogl_clip_stack_state_destroy (CoglClipStackState *clip_state)
{
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
/* Destroy all of the stacks */
while (ctx->clip.stacks)
cogl_clip_stack_restore ();
while (clip_state->stacks)
_cogl_clip_stack_restore_real (clip_state);
}
void
_cogl_clip_stack_state_dirty (CoglClipStackState *clip_state)
{
clip_state->stack_dirty = TRUE;
}

9
cogl/cogl-clip-stack.h
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@ -35,9 +35,10 @@ struct _CoglClipStackState
gboolean stencil_used;
};
void _cogl_clip_stack_state_init (void);
void _cogl_clip_stack_state_destroy (void);
void _cogl_clip_stack_rebuild (void);
void _cogl_clip_stack_merge (void);
void _cogl_clip_stack_state_init (CoglClipStackState *state);
void _cogl_clip_stack_state_destroy (CoglClipStackState *state);
void _cogl_clip_stack_state_dirty (CoglClipStackState *state);
void _cogl_flush_clip_state (CoglClipStackState *clip_state);
#endif /* __COGL_CLIP_STACK_H */

34
cogl/cogl-context.c
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@ -32,6 +32,7 @@
#include "cogl-journal-private.h"
#include "cogl-texture-private.h"
#include "cogl-material-private.h"
#include "cogl-draw-buffer-private.h"
#include <string.h>
@ -46,7 +47,7 @@ cogl_create_context (void)
{
GLubyte default_texture_data[] = { 0xff, 0xff, 0xff, 0x0 };
gulong enable_flags = 0;
CoglDrawBufferState *draw_buffer;
CoglHandle window_buffer;
if (_context != NULL)
return FALSE;
@ -66,8 +67,6 @@ cogl_create_context (void)
_context->indirect = gl_is_indirect;
_context->flushed_matrix_mode = COGL_MATRIX_MODELVIEW;
_context->modelview_stack = _cogl_matrix_stack_new ();
_context->projection_stack = _cogl_matrix_stack_new ();
_context->texture_units = NULL;
_context->default_material = cogl_material_new ();
@ -87,11 +86,14 @@ cogl_create_context (void)
sizeof (CoglLayerInfo));
_context->n_texcoord_arrays_enabled = 0;
draw_buffer = g_slice_new0 (CoglDrawBufferState);
draw_buffer->target = COGL_WINDOW_BUFFER;
draw_buffer->offscreen = COGL_INVALID_HANDLE;
_context->draw_buffer_stack =
g_slist_prepend (NULL, draw_buffer);
_context->draw_buffer_stack = _cogl_create_draw_buffer_stack ();
window_buffer = _cogl_onscreen_new ();
/* XXX: When setting up the window buffer, cogl_set_draw_buffer
* assumes that the handle can be found in ctx->window_buffer */
_context->window_buffer = window_buffer;
cogl_set_draw_buffer (COGL_WINDOW_BUFFER, 0/* ignored */);
_context->dirty_bound_framebuffer = TRUE;
_context->dirty_viewport = TRUE;
_context->path_nodes = g_array_new (FALSE, FALSE, sizeof (CoglPathNode));
_context->last_path = 0;
@ -99,20 +101,16 @@ cogl_create_context (void)
_context->in_begin_gl_block = FALSE;
_context->viewport_width = 0;
_context->viewport_height = 0;
_context->quad_indices_byte = COGL_INVALID_HANDLE;
_context->quad_indices_short = COGL_INVALID_HANDLE;
_context->quad_indices_short_len = 0;
_context->texture_download_material = COGL_INVALID_HANDLE;
/* Initialise the clip stack */
_cogl_clip_stack_state_init ();
/* Initialise the driver specific state */
/* TODO: combine these two into one function */
_cogl_create_context_driver (_context);
_cogl_features_init ();
/* Create default textures used for fall backs */
_context->default_gl_texture_2d_tex =
@ -146,16 +144,14 @@ cogl_create_context (void)
void
_cogl_destroy_context ()
{
if (_context == NULL)
return;
_cogl_clip_stack_state_destroy ();
_cogl_matrix_stack_destroy (_context->modelview_stack);
_cogl_matrix_stack_destroy (_context->projection_stack);
_cogl_destroy_texture_units ();
_cogl_free_draw_buffer_stack (_context->draw_buffer_stack);
if (_context->path_nodes)
g_array_free (_context->path_nodes, TRUE);

20
cogl/cogl-context.h
View File

@ -38,12 +38,6 @@ typedef struct
GLubyte c[4];
} CoglTextureGLVertex;
typedef struct
{
CoglBufferTarget target;
CoglHandle offscreen;
} CoglDrawBufferState;
typedef struct
{
/* Features cache */
@ -60,9 +54,6 @@ typedef struct
/* Client-side matrix stack or NULL if none */
CoglMatrixMode flushed_matrix_mode;
CoglMatrixStack *projection_stack;
CoglMatrixStack *modelview_stack;
GList *texture_units;
/* Cache of inverse projection matrix */
@ -91,11 +82,11 @@ typedef struct
GArray *current_layers;
guint n_texcoord_arrays_enabled;
/* Framebuffer objects */
/* Draw Buffers */
GSList *draw_buffer_stack;
/* Clip stack */
CoglClipStackState clip;
CoglHandle window_buffer;
gboolean dirty_bound_framebuffer;
gboolean dirty_viewport;
/* Primitives */
floatVec2 path_start;
@ -114,9 +105,6 @@ typedef struct
gboolean in_begin_gl_block;
guint viewport_width;
guint viewport_height;
CoglHandle texture_download_material;
CoglContextDriver drv;

126
cogl/cogl-draw-buffer-private.h Normal file
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@ -0,0 +1,126 @@
/*
* Cogl
*
* An object oriented GL/GLES Abstraction/Utility Layer
*
* Copyright (C) 2007,2008,2009 Intel Corporation.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __COGL_DRAW_BUFFER_PRIVATE_H
#define __COGL_DRAW_BUFFER_PRIVATE_H
#include "cogl-handle.h"
#include "cogl-matrix-stack.h"
#include "cogl-clip-stack.h"
typedef enum _CoglDrawBufferType {
COGL_DRAW_BUFFER_TYPE_ONSCREEN,
COGL_DRAW_BUFFER_TYPE_OFFSCREEN
} CoglDrawBufferType;
typedef struct
{
CoglHandleObject _parent;
CoglDrawBufferType type;
int width;
int height;
CoglMatrixStack *modelview_stack;
CoglMatrixStack *projection_stack;
int viewport_x;
int viewport_y;
int viewport_width;
int viewport_height;
CoglClipStackState clip_state;
} CoglDrawBuffer;
#define COGL_DRAW_BUFFER(X) ((CoglDrawBuffer *)(X))
typedef struct _CoglDrawBufferStackEntry
{
CoglBufferTarget target;
CoglHandle draw_buffer;
} CoglDrawBufferStackEntry;
typedef struct _CoglOffscreen
{
CoglDrawBuffer _parent;
GLuint fbo_handle;
GLuint gl_stencil_handle;
} CoglOffscreen;
#define COGL_OFFSCREEN(X) ((CoglOffscreen *)(X))
typedef struct _CoglOnscreen
{
CoglDrawBuffer _parent;
} CoglOnscreen;
#define COGL_ONSCREEN(X) ((CoglOnscreen *)(X))
void
_cogl_draw_buffer_state_init (void);
CoglClipStackState *
_cogl_draw_buffer_get_clip_state (CoglHandle handle);
void
_cogl_draw_buffer_set_viewport (CoglHandle handle,
int x,
int y,
int width,
int height);
int
_cogl_draw_buffer_get_viewport_x (CoglHandle handle);
int
_cogl_draw_buffer_get_viewport_y (CoglHandle handle);
int
_cogl_draw_buffer_get_viewport_width (CoglHandle handle);
int
_cogl_draw_buffer_get_viewport_height (CoglHandle handle);
void
_cogl_draw_buffer_get_viewport4fv (CoglHandle handle, int *viewport);
CoglMatrixStack *
_cogl_draw_buffer_get_modelview_stack (CoglHandle handle);
CoglMatrixStack *
_cogl_draw_buffer_get_projection_stack (CoglHandle handle);
typedef enum _CoglDrawBufferFlushFlags
{
/* XXX: When using this, that imples you are going to manually load the
* modelview matrix (via glLoadMatrix). _cogl_matrix_stack_flush_to_gl wont
* be called for draw_buffer->modelview_stack, and the modelview_stack will
* also be marked as dirty. */
COGL_DRAW_BUFFER_FLUSH_SKIP_MODELVIEW = 1L<<0,
} CoglDrawBufferFlushFlags;
void
_cogl_draw_buffer_flush_state (CoglHandle handle,
CoglDrawBufferFlushFlags flags);
CoglHandle
_cogl_onscreen_new (void);
CoglHandle
_cogl_get_draw_buffer (void);
GSList *
_cogl_create_draw_buffer_stack (void);
void
_cogl_free_draw_buffer_stack (GSList *stack);
#endif /* __COGL_DRAW_BUFFER_PRIVATE_H */

555
cogl/cogl-draw-buffer.c Normal file
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@ -0,0 +1,555 @@
/*
* Cogl
*
* An object oriented GL/GLES Abstraction/Utility Layer
*
* Copyright (C) 2007,2008,2009 Intel Corporation.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "cogl.h"
#include "cogl-internal.h"
#include "cogl-context.h"
#include "cogl-handle.h"
#include "cogl-util.h"
#include "cogl-texture-private.h"
#include "cogl-draw-buffer-private.h"
#include "cogl-clip-stack.h"
#ifdef HAVE_COGL_GLES2
#include "../gles/cogl-gles2-wrapper.h"
#else
#define glGenRenderbuffers ctx->drv.pf_glGenRenderbuffers
#define glDeleteRenderbuffers ctx->drv.pf_glDeleteRenderbuffers
#define glBindRenderbuffer ctx->drv.pf_glBindRenderbuffer
#define glRenderbufferStorage ctx->drv.pf_glRenderbufferStorage
#define glGenFramebuffers ctx->drv.pf_glGenFramebuffers
#define glBindFramebuffer ctx->drv.pf_glBindFramebuffer
#define glFramebufferTexture2D ctx->drv.pf_glFramebufferTexture2D
#define glFramebufferRenderbuffer ctx->drv.pf_glFramebufferRenderbuffer
#define glCheckFramebufferStatus ctx->drv.pf_glCheckFramebufferStatus
#define glDeleteFramebuffers ctx->drv.pf_glDeleteFramebuffers
#endif
#ifndef GL_FRAMEBUFFER
#define GL_FRAMEBUFFER 0x8D40
#endif
#ifndef GL_RENDERBUFFER
#define GL_RENDERBUFFER 0x8D41
#endif
#ifndef GL_STENCIL_ATTACHMENT
#define GL_STENCIL_ATTACHMENT 0x8D00
#endif
#ifndef GL_COLOR_ATTACHMENT0
#define GL_COLOR_ATTACHMENT0 0x8CE0
#endif
#ifndef GL_FRAMEBUFFER_COMPLETE
#define GL_FRAMEBUFFER_COMPLETE 0x8CD5
#endif
#ifndef GL_STENCIL_INDEX8
#define GL_STENCIL_INDEX8 0x8D48
#endif
static void _cogl_draw_buffer_free (CoglDrawBuffer *draw_buffer);
static void _cogl_onscreen_free (CoglOnscreen *onscreen);
static void _cogl_offscreen_free (CoglOffscreen *offscreen);
COGL_HANDLE_DEFINE (Onscreen, onscreen);
COGL_HANDLE_DEFINE (Offscreen, offscreen);
/* XXX:
* The CoglHandle macros don't support any form of inheritance, so for
* now we implement the CoglHandle support for the CoglDrawBuffer
* abstract class manually.
*/
gboolean
cogl_is_draw_buffer (CoglHandle handle)
{
CoglHandleObject *obj = (CoglHandleObject *)handle;
if (handle == COGL_INVALID_HANDLE)
return FALSE;
return obj->klass->type == _cogl_handle_onscreen_get_type ()
|| obj->klass->type == _cogl_handle_offscreen_get_type ();
}
static void
_cogl_draw_buffer_init (CoglDrawBuffer *draw_buffer,
CoglDrawBufferType type,
int width,
int height)
{
draw_buffer->type = type;
draw_buffer->width = width;
draw_buffer->height = height;
draw_buffer->viewport_x = 0;
draw_buffer->viewport_y = 0;
draw_buffer->viewport_width = width;
draw_buffer->viewport_height = height;
draw_buffer->modelview_stack = _cogl_matrix_stack_new ();
draw_buffer->projection_stack = _cogl_matrix_stack_new ();
/* Initialise the clip stack */
_cogl_clip_stack_state_init (&draw_buffer->clip_state);
}
void
_cogl_draw_buffer_free (CoglDrawBuffer *draw_buffer)
{
_cogl_clip_stack_state_destroy (&draw_buffer->clip_state);
_cogl_matrix_stack_destroy (draw_buffer->modelview_stack);
draw_buffer->modelview_stack = NULL;
_cogl_matrix_stack_destroy (draw_buffer->projection_stack);
draw_buffer->projection_stack = NULL;
}
CoglClipStackState *
_cogl_draw_buffer_get_clip_state (CoglHandle handle)
{
CoglDrawBuffer *draw_buffer = COGL_DRAW_BUFFER (handle);
return &draw_buffer->clip_state;
}
void
_cogl_draw_buffer_set_viewport (CoglHandle handle,
int x,
int y,
int width,
int height)
{
CoglDrawBuffer *draw_buffer = COGL_DRAW_BUFFER (handle);
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
if (draw_buffer->viewport_x == x &&
draw_buffer->viewport_y == y &&
draw_buffer->viewport_width == width &&
draw_buffer->viewport_height == height)
return;
_cogl_journal_flush ();
draw_buffer->viewport_x = x;
draw_buffer->viewport_y = y;
draw_buffer->viewport_width = width;
draw_buffer->viewport_height = height;
if (_cogl_get_draw_buffer () == draw_buffer)
ctx->dirty_viewport = TRUE;
}
int
_cogl_draw_buffer_get_viewport_x (CoglHandle handle)
{
CoglDrawBuffer *draw_buffer = COGL_DRAW_BUFFER (handle);
return draw_buffer->viewport_x;
}
int
_cogl_draw_buffer_get_viewport_y (CoglHandle handle)
{
CoglDrawBuffer *draw_buffer = COGL_DRAW_BUFFER (handle);
return draw_buffer->viewport_y;
}
int
_cogl_draw_buffer_get_viewport_width (CoglHandle handle)
{
CoglDrawBuffer *draw_buffer = COGL_DRAW_BUFFER (handle);
return draw_buffer->viewport_width;
}
int
_cogl_draw_buffer_get_viewport_height (CoglHandle handle)
{
CoglDrawBuffer *draw_buffer = COGL_DRAW_BUFFER (handle);
return draw_buffer->viewport_height;
}
void
_cogl_draw_buffer_get_viewport4fv (CoglHandle handle, int *viewport)
{
CoglDrawBuffer *draw_buffer = COGL_DRAW_BUFFER (handle);
viewport[0] = draw_buffer->viewport_x;
viewport[1] = draw_buffer->viewport_y;
viewport[2] = draw_buffer->viewport_width;
viewport[3] = draw_buffer->viewport_height;
}
CoglMatrixStack *
_cogl_draw_buffer_get_modelview_stack (CoglHandle handle)
{
CoglDrawBuffer *draw_buffer = COGL_DRAW_BUFFER (handle);
return draw_buffer->modelview_stack;
}
CoglMatrixStack *
_cogl_draw_buffer_get_projection_stack (CoglHandle handle)
{
CoglDrawBuffer *draw_buffer = COGL_DRAW_BUFFER (handle);
return draw_buffer->projection_stack;
}
CoglHandle
cogl_offscreen_new_to_texture (CoglHandle texhandle)
{
CoglOffscreen *offscreen;
int width;
int height;
GLuint tex_gl_handle;
GLenum tex_gl_target;
GLuint fbo_gl_handle;
GLuint gl_stencil_handle;
GLenum status;
_COGL_GET_CONTEXT (ctx, COGL_INVALID_HANDLE);
if (!cogl_features_available (COGL_FEATURE_OFFSCREEN))
return COGL_INVALID_HANDLE;
/* Make texhandle is a valid texture object */
if (!cogl_is_texture (texhandle))
return COGL_INVALID_HANDLE;
/* The texture must not be sliced */
if (cogl_texture_is_sliced (texhandle))
return COGL_INVALID_HANDLE;
/* Pick the single texture slice width, height and GL id */
width = cogl_texture_get_width (texhandle);
height = cogl_texture_get_height (texhandle);
if (!cogl_texture_get_gl_texture (texhandle, &tex_gl_handle, &tex_gl_target))
return COGL_INVALID_HANDLE;
if (tex_gl_target != GL_TEXTURE_2D)
return COGL_INVALID_HANDLE;
/* Create a renderbuffer for stenciling */
GE (glGenRenderbuffers (1, &gl_stencil_handle));
GE (glBindRenderbuffer (GL_RENDERBUFFER, gl_stencil_handle));
GE (glRenderbufferStorage (GL_RENDERBUFFER, GL_STENCIL_INDEX8,
cogl_texture_get_width (texhandle),
cogl_texture_get_height (texhandle)));
GE (glBindRenderbuffer (GL_RENDERBUFFER, 0));
/* We are about to generate and bind a new fbo, so when next flushing the
* journal, we will need to rebind the current draw buffer... */
ctx->dirty_bound_framebuffer = 1;
/* Generate framebuffer */
glGenFramebuffers (1, &fbo_gl_handle);
GE (glBindFramebuffer (GL_FRAMEBUFFER, fbo_gl_handle));
GE (glFramebufferTexture2D (GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
tex_gl_target, tex_gl_handle, 0));
GE (glFramebufferRenderbuffer (GL_FRAMEBUFFER,
GL_STENCIL_ATTACHMENT,
GL_RENDERBUFFER, gl_stencil_handle));
/* XXX: The framebuffer_object spec isn't clear in defining whether attaching
* a texture as a renderbuffer with mipmap filtering enabled while the
* mipmaps have not been uploaded should result in an incomplete framebuffer
* object. (different drivers make different decisions)
*
* To avoid an error with drivers that do consider this a problem we
* explicitly set non mipmapped filters here. These will later be reset when
* the texture is actually used for rendering according to the filters set on
* the corresponding CoglMaterial.
*/
_cogl_texture_set_filters (texhandle, GL_NEAREST, GL_NEAREST);
/* Make sure it's complete */
status = glCheckFramebufferStatus (GL_FRAMEBUFFER);
if (status != GL_FRAMEBUFFER_COMPLETE)
{
/* Stencil renderbuffers aren't always supported. Try again
without the stencil buffer */
GE (glFramebufferRenderbuffer (GL_FRAMEBUFFER,
GL_STENCIL_ATTACHMENT,
GL_RENDERBUFFER,
0));
GE (glDeleteRenderbuffers (1, &gl_stencil_handle));
gl_stencil_handle = 0;
status = glCheckFramebufferStatus (GL_FRAMEBUFFER);
if (status != GL_FRAMEBUFFER_COMPLETE)
{
/* Still failing, so give up */
GE (glDeleteFramebuffers (1, &fbo_gl_handle));
GE (glBindFramebuffer (GL_FRAMEBUFFER, 0));
return COGL_INVALID_HANDLE;
}
}
offscreen = g_new0 (CoglOffscreen, 1);
_cogl_draw_buffer_init (COGL_DRAW_BUFFER (offscreen),
COGL_DRAW_BUFFER_TYPE_OFFSCREEN,
width,
height);
offscreen->fbo_handle = fbo_gl_handle;
offscreen->gl_stencil_handle = gl_stencil_handle;
/* XXX: Can we get a away with removing this? It wasn't documented, and most
* users of the API are hopefully setting up the modelview from scratch
* anyway */
#if 0
cogl_matrix_translate (&draw_buffer->modelview, -1.0f, -1.0f, 0.0f);
cogl_matrix_scale (&draw_buffer->modelview,
2.0f / draw_buffer->width, 2.0f / draw_buffer->height, 1.0f);
#endif
return _cogl_offscreen_handle_new (offscreen);
}
static void
_cogl_offscreen_free (CoglOffscreen *offscreen)
{
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
/* Chain up to parent */
_cogl_draw_buffer_free (COGL_DRAW_BUFFER (offscreen));
if (offscreen->gl_stencil_handle)
GE (glDeleteRenderbuffers (1, &offscreen->gl_stencil_handle));
GE (glDeleteFramebuffers (1, &offscreen->fbo_handle));
g_free (offscreen);
}
CoglHandle
_cogl_onscreen_new (void)
{
CoglOnscreen *onscreen;
/* XXX: Until we have full winsys support in Cogl then we can't fully
* implement CoglOnscreen draw buffers, since we can't, e.g. keep track of
* the window size. */
onscreen = g_new0 (CoglOnscreen, 1);
_cogl_draw_buffer_init (COGL_DRAW_BUFFER (onscreen),
COGL_DRAW_BUFFER_TYPE_ONSCREEN,
0xdeadbeef, /* width */
0xdeadbeef); /* height */
return _cogl_onscreen_handle_new (onscreen);
}
static void
_cogl_onscreen_free (CoglOnscreen *onscreen)
{
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
/* Chain up to parent */
_cogl_draw_buffer_free (COGL_DRAW_BUFFER (onscreen));
g_free (onscreen);
}
GSList *
_cogl_create_draw_buffer_stack (void)
{
GSList *stack = NULL;
CoglDrawBufferStackEntry *entry;
entry = g_slice_new0 (CoglDrawBufferStackEntry);
entry->target = COGL_WINDOW_BUFFER;
entry->draw_buffer = COGL_INVALID_HANDLE;
return g_slist_prepend (stack, entry);
}
void
_cogl_free_draw_buffer_stack (GSList *stack)
{
GSList *l;
for (l = stack; l != NULL; l = l->next)
{
CoglDrawBufferStackEntry *entry = l->data;
CoglDrawBuffer *draw_buffer = COGL_DRAW_BUFFER (entry->draw_buffer);
if (draw_buffer->type == COGL_DRAW_BUFFER_TYPE_OFFSCREEN)
_cogl_offscreen_free (COGL_OFFSCREEN (draw_buffer));
else
_cogl_onscreen_free (COGL_ONSCREEN (draw_buffer));
}
g_slist_free (stack);
}
/* XXX: The target argument is redundant; when we break API, we should
* remove it! */
void
cogl_set_draw_buffer (CoglBufferTarget target, CoglHandle handle)
{
CoglDrawBuffer *draw_buffer = NULL;
CoglDrawBufferStackEntry *entry;
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
_cogl_journal_flush ();
g_assert (ctx->draw_buffer_stack != NULL);
entry = ctx->draw_buffer_stack->data;
if (target == COGL_WINDOW_BUFFER)
handle = ctx->window_buffer;
else if (!cogl_is_draw_buffer (handle))
return;
draw_buffer = COGL_DRAW_BUFFER (handle);
if (entry->draw_buffer != draw_buffer)
{
entry->target = target;
ctx->dirty_bound_framebuffer = 1;
ctx->dirty_viewport = 1;
if (draw_buffer != COGL_INVALID_HANDLE)
cogl_handle_ref (draw_buffer);
if (entry->draw_buffer != COGL_INVALID_HANDLE)
cogl_handle_unref (entry->draw_buffer);
entry->draw_buffer = draw_buffer;
/* We've effectively just switched the current modelview and
* projection matrix stacks and clip state so we need to dirty
* them to ensure they get flushed for the next batch of geometry
* we flush */
_cogl_matrix_stack_dirty (draw_buffer->modelview_stack);
_cogl_matrix_stack_dirty (draw_buffer->projection_stack);
_cogl_clip_stack_state_dirty (&draw_buffer->clip_state);
}
}
CoglHandle
_cogl_get_draw_buffer (void)
{
CoglDrawBufferStackEntry *entry;
_COGL_GET_CONTEXT (ctx, NULL);
g_assert (ctx->draw_buffer_stack);
entry = ctx->draw_buffer_stack->data;
return entry->draw_buffer;
}
void
cogl_push_draw_buffer (void)
{
CoglDrawBufferStackEntry *old;
CoglDrawBufferStackEntry *entry;
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
entry = g_slice_new0 (CoglDrawBufferStackEntry);
g_assert (ctx->draw_buffer_stack);
old = ctx->draw_buffer_stack->data;
*entry = *old;
cogl_handle_ref (entry->draw_buffer);
ctx->draw_buffer_stack =
g_slist_prepend (ctx->draw_buffer_stack, entry);
}
void
cogl_pop_draw_buffer (void)
{
CoglDrawBufferStackEntry *to_pop;
CoglDrawBufferStackEntry *to_restore;
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
g_assert (ctx->draw_buffer_stack != NULL);
to_pop = ctx->draw_buffer_stack->data;
to_restore = ctx->draw_buffer_stack->next->data;
cogl_set_draw_buffer (to_restore->target, to_restore->draw_buffer);
cogl_handle_unref (to_pop->draw_buffer);
ctx->draw_buffer_stack =
g_slist_remove_link (ctx->draw_buffer_stack,
ctx->draw_buffer_stack);
g_slice_free (CoglDrawBufferStackEntry, to_pop);
}
void
_cogl_draw_buffer_flush_state (CoglHandle handle,
CoglDrawBufferFlushFlags flags)
{
CoglDrawBuffer *draw_buffer;
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
draw_buffer = COGL_DRAW_BUFFER (handle);
if (cogl_features_available (COGL_FEATURE_OFFSCREEN) &&
ctx->dirty_bound_framebuffer)
{
if (draw_buffer->type == COGL_DRAW_BUFFER_TYPE_OFFSCREEN)
{
GE (glBindFramebuffer (GL_FRAMEBUFFER,
COGL_OFFSCREEN (draw_buffer)->fbo_handle));
}
else
GE (glBindFramebuffer (GL_FRAMEBUFFER, 0));
ctx->dirty_bound_framebuffer = FALSE;
}
if (ctx->dirty_viewport)
{
GE (glViewport (draw_buffer->viewport_x,
draw_buffer->viewport_y,
draw_buffer->viewport_width,
draw_buffer->viewport_height));
ctx->dirty_viewport = FALSE;
}
/* XXX: Flushing clip state may trash the modelview and projection
* matrices so we must do it before flushing the matrices...
*/
_cogl_flush_clip_state (&draw_buffer->clip_state);
if (!(flags & COGL_DRAW_BUFFER_FLUSH_SKIP_MODELVIEW))
_cogl_matrix_stack_flush_to_gl (draw_buffer->modelview_stack,
COGL_MATRIX_MODELVIEW);
_cogl_matrix_stack_flush_to_gl (draw_buffer->projection_stack,
COGL_MATRIX_PROJECTION);
}

33
cogl/cogl-journal.c
View File

@ -32,6 +32,7 @@
#include "cogl-texture-private.h"
#include "cogl-material-private.h"
#include "cogl-vertex-buffer-private.h"
#include "cogl-draw-buffer-private.h"
#include <string.h>
#include <gmodule.h>
@ -531,6 +532,8 @@ _cogl_journal_flush (void)
GLuint journal_vbo;
gboolean vbo_fallback =
(cogl_get_features () & COGL_FEATURE_VBOS) ? FALSE : TRUE;
CoglHandle draw_buffer;
CoglMatrixStack *modelview_stack;
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
@ -547,20 +550,19 @@ _cogl_journal_flush (void)
else
state.vbo_offset = (char *)ctx->logged_vertices->data;
_cogl_matrix_stack_flush_to_gl (ctx->projection_stack,
COGL_MATRIX_PROJECTION);
draw_buffer = _cogl_get_draw_buffer ();
modelview_stack = _cogl_draw_buffer_get_modelview_stack (draw_buffer);
state.modelview_stack = modelview_stack;
state.modelview_stack = ctx->modelview_stack;
_cogl_matrix_stack_push (ctx->modelview_stack);
_cogl_matrix_stack_push (modelview_stack);
/* If we have transformed all our quads at log time then we ensure no
* further model transform is applied by loading the identity matrix
* here... */
if (G_LIKELY (!(cogl_debug_flags & COGL_DEBUG_DISABLE_SOFTWARE_TRANSFORM)))
{
_cogl_matrix_stack_load_identity (ctx->modelview_stack);
_cogl_matrix_stack_flush_to_gl (ctx->modelview_stack,
COGL_MATRIX_MODELVIEW);
_cogl_matrix_stack_load_identity (modelview_stack);
_cogl_matrix_stack_flush_to_gl (modelview_stack, COGL_MATRIX_MODELVIEW);
}
/* batch_and_call() batches a list of journal entries according to some
@ -591,7 +593,7 @@ _cogl_journal_flush (void)
_cogl_journal_flush_vbo_offsets_and_entries, /* callback */
&state); /* data */
_cogl_matrix_stack_pop (ctx->modelview_stack);
_cogl_matrix_stack_pop (modelview_stack);
for (i = 0; i < ctx->journal->len; i++)
{
@ -607,6 +609,18 @@ _cogl_journal_flush (void)
g_array_set_size (ctx->logged_vertices, 0);
}
static void
_cogl_journal_init (void)
{
/* Here we flush anything that we know must remain constant until the
* next the the journal is flushed. Note: This lets up flush things
* that themselves depend on the journal, such as clip state. */
/* NB: the journal deals with flushing the modelview stack manually */
_cogl_draw_buffer_flush_state (_cogl_get_draw_buffer (),
COGL_DRAW_BUFFER_FLUSH_SKIP_MODELVIEW);
}
void
_cogl_journal_log_quad (float x_1,
float y_1,
@ -632,6 +646,9 @@ _cogl_journal_log_quad (float x_1,
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
if (ctx->logged_vertices->len == 0)
_cogl_journal_init ();
/* The vertex data is logged into a separate array in a layout that can be
* directly passed to OpenGL
*/

19
cogl/cogl-primitives.c
View File

@ -32,6 +32,7 @@
#include "cogl-texture-private.h"
#include "cogl-material-private.h"
#include "cogl-vertex-buffer-private.h"
#include "cogl-draw-buffer-private.h"
#include <string.h>
#include <math.h>
@ -396,8 +397,6 @@ _cogl_rectangles_with_multitexture_coords (
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
cogl_clip_ensure ();
material = ctx->source_material;
layers = cogl_material_get_layers (material);
@ -706,7 +705,6 @@ draw_polygon_sub_texture_cb (CoglHandle tex_handle,
options.layer0_override_texture = gl_handle;
_cogl_material_flush_gl_state (ctx->source_material, &options);
_cogl_flush_matrix_stacks ();
GE (glDrawArrays (GL_TRIANGLE_FAN, 0, state->n_vertices));
}
@ -840,7 +838,6 @@ _cogl_multitexture_polygon_single_primitive (CoglTextureVertex *vertices,
options.flags |= COGL_MATERIAL_FLUSH_SKIP_GL_COLOR;
options.fallback_layers = fallback_layers;
_cogl_material_flush_gl_state (ctx->source_material, &options);
_cogl_flush_matrix_stacks ();
GE (glDrawArrays (GL_TRIANGLE_FAN, 0, n_vertices));
}
@ -866,7 +863,11 @@ cogl_polygon (CoglTextureVertex *vertices,
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
_cogl_journal_flush ();
cogl_clip_ensure ();
/* NB: _cogl_draw_buffer_flush_state may disrupt various state (such
* as the material state) when flushing the clip stack, so should
* always be done first when preparing to draw. */
_cogl_draw_buffer_flush_state (_cogl_get_draw_buffer (), 0);
material = ctx->source_material;
layers = cogl_material_get_layers (ctx->source_material);
@ -1030,9 +1031,6 @@ cogl_path_fill_preserve (void)
{
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
_cogl_journal_flush ();
cogl_clip_ensure ();
if (ctx->path_nodes->len == 0)
return;
@ -1055,10 +1053,7 @@ cogl_path_stroke_preserve (void)
if (ctx->path_nodes->len == 0)
return;
_cogl_journal_flush ();
cogl_clip_ensure ();
_cogl_path_stroke_nodes();
_cogl_path_stroke_nodes ();
}
void

19
cogl/cogl-texture.c
View File

@ -42,6 +42,7 @@
#include "cogl-context.h"
#include "cogl-handle.h"
#include "cogl-primitives.h"
#include "cogl-draw-buffer-private.h"
#include <string.h>
#include <stdlib.h>
@ -667,7 +668,8 @@ _cogl_texture_draw_and_read (CoglTexture *tex,
GLuint target_gl_type)
{
gint bpp;
GLint viewport[4];
CoglHandle draw_buffer;
int viewport[4];
CoglBitmap alpha_bmp;
CoglHandle prev_source;
CoglMatrixStack *projection_stack;
@ -677,8 +679,9 @@ _cogl_texture_draw_and_read (CoglTexture *tex,
bpp = _cogl_get_format_bpp (COGL_PIXEL_FORMAT_RGBA_8888);
draw_buffer = _cogl_get_draw_buffer ();
/* Viewport needs to have some size and be inside the window for this */
GE( glGetIntegerv (GL_VIEWPORT, viewport));
_cogl_draw_buffer_get_viewport4fv (draw_buffer, viewport);
if (viewport[0] < 0 || viewport[1] < 0 ||
viewport[2] <= 0 || viewport[3] <= 0)
return FALSE;
@ -688,16 +691,18 @@ _cogl_texture_draw_and_read (CoglTexture *tex,
* works)
*/
_cogl_matrix_stack_push (ctx->projection_stack);
_cogl_matrix_stack_load_identity (ctx->projection_stack);
_cogl_matrix_stack_ortho (ctx->projection_stack,
projection_stack = _cogl_draw_buffer_get_projection_stack (draw_buffer);
_cogl_matrix_stack_push (projection_stack);
_cogl_matrix_stack_load_identity (projection_stack);
_cogl_matrix_stack_ortho (projection_stack,
0, (float)(viewport[2]),
0, (float)(viewport[3]),
(float)(0),
(float)(100));
_cogl_matrix_stack_push (ctx->modelview_stack);
_cogl_matrix_stack_load_identity (ctx->modelview_stack);
modelview_stack = _cogl_draw_buffer_get_modelview_stack (draw_buffer);
_cogl_matrix_stack_push (modelview_stack);
_cogl_matrix_stack_load_identity (modelview_stack);
/* Direct copy operation */

14
cogl/cogl-vertex-buffer.c
View File

@ -138,6 +138,7 @@
#include "cogl-texture-private.h"
#include "cogl-material-private.h"
#include "cogl-primitives.h"
#include "cogl-draw-buffer-private.h"
#define PAD_FOR_ALIGNMENT(VAR, TYPE_SIZE) \
(VAR = TYPE_SIZE + ((VAR - 1) & ~(TYPE_SIZE - 1)))
@ -1664,6 +1665,11 @@ enable_state_for_drawing_buffer (CoglVertexBuffer *buffer)
}
ctx->n_texcoord_arrays_enabled = max_texcoord_attrib_unit + 1;
/* NB: _cogl_draw_buffer_flush_state may disrupt various state (such
* as the material state) when flushing the clip stack, so should
* always be done first when preparing to draw. */
_cogl_draw_buffer_flush_state (_cogl_get_draw_buffer (), 0);
options.flags =
COGL_MATERIAL_FLUSH_FALLBACK_MASK |
COGL_MATERIAL_FLUSH_DISABLE_MASK;
@ -1753,15 +1759,11 @@ cogl_vertex_buffer_draw (CoglHandle handle,
return;
_cogl_journal_flush ();
cogl_clip_ensure ();
buffer = _cogl_vertex_buffer_pointer_from_handle (handle);
cogl_clip_ensure ();
_cogl_flush_matrix_stacks ();
enable_state_for_drawing_buffer (buffer);
/* FIXME: flush cogl cache */
GE (glDrawArrays (mode, first, count));
disable_state_for_drawing_buffer (buffer);
@ -1885,7 +1887,6 @@ cogl_vertex_buffer_draw_elements (CoglHandle handle,
return;
_cogl_journal_flush ();
cogl_clip_ensure ();
buffer = _cogl_vertex_buffer_pointer_from_handle (handle);
@ -1894,8 +1895,6 @@ cogl_vertex_buffer_draw_elements (CoglHandle handle,
indices = _cogl_vertex_buffer_indices_pointer_from_handle (indices_handle);
cogl_clip_ensure ();
_cogl_flush_matrix_stacks ();
enable_state_for_drawing_buffer (buffer);
byte_offset = indices_offset * get_indices_type_size (indices->type);
@ -1905,7 +1904,6 @@ cogl_vertex_buffer_draw_elements (CoglHandle handle,
GE (glBindBuffer (GL_ELEMENT_ARRAY_BUFFER,
GPOINTER_TO_UINT (indices->vbo_name)));
/* FIXME: flush cogl cache */
GE (glDrawRangeElements (mode, min_index, max_index,
count, indices->type, (void *)byte_offset));

222
cogl/cogl.c
View File

@ -38,6 +38,7 @@
#include "cogl-context.h"
#include "cogl-material-private.h"
#include "cogl-winsys.h"
#include "cogl-draw-buffer-private.h"
#if defined (HAVE_COGL_GLES2) || defined (HAVE_COGL_GLES)
#include "cogl-gles2-wrapper.h"
@ -116,7 +117,12 @@ cogl_clear (const CoglColor *color, gulong buffers)
COGL_NOTE (DRAW, "Clear begin");
cogl_clip_ensure ();
_cogl_journal_flush ();
/* NB: _cogl_draw_buffer_flush_state may disrupt various state (such
* as the material state) when flushing the clip stack, so should
* always be done first when preparing to draw. */
_cogl_draw_buffer_flush_state (_cogl_get_draw_buffer (), 0);
if (buffers & COGL_BUFFER_BIT_COLOR)
{
@ -327,6 +333,10 @@ set_clip_plane (GLint plane_num,
#endif
GLfloat angle;
CoglMatrix inverse_projection;
CoglHandle draw_buffer = _cogl_get_draw_buffer ();
CoglMatrixStack *modelview_stack =
_cogl_draw_buffer_get_modelview_stack (draw_buffer);
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
/* Calculate the angle between the axes and the line crossing the
@ -334,24 +344,25 @@ set_clip_plane (GLint plane_num,
angle = atan2f (vertex_b[1] - vertex_a[1],
vertex_b[0] - vertex_a[0]) * (180.0/G_PI);
_cogl_matrix_stack_push (ctx->modelview_stack);
_cogl_matrix_stack_push (modelview_stack);
/* Load the identity matrix and multiply by the reverse of the
projection matrix so we can specify the plane in screen
coordinates */
_cogl_matrix_stack_load_identity (ctx->modelview_stack);
_cogl_matrix_stack_load_identity (modelview_stack);
cogl_matrix_init_from_array (&inverse_projection,
ctx->inverse_projection);
_cogl_matrix_stack_multiply (ctx->modelview_stack, &inverse_projection);
_cogl_matrix_stack_multiply (modelview_stack, &inverse_projection);
/* Rotate about point a */
_cogl_matrix_stack_translate (ctx->modelview_stack,
_cogl_matrix_stack_translate (modelview_stack,
vertex_a[0], vertex_a[1], vertex_a[2]);
/* Rotate the plane by the calculated angle so that it will connect
the two points */
_cogl_matrix_stack_rotate (ctx->modelview_stack, angle, 0.0f, 0.0f, 1.0f);
_cogl_matrix_stack_translate (ctx->modelview_stack,
_cogl_matrix_stack_rotate (modelview_stack, angle, 0.0f, 0.0f, 1.0f);
_cogl_matrix_stack_translate (modelview_stack,
-vertex_a[0], -vertex_a[1], -vertex_a[2]);
_cogl_flush_matrix_stacks ();
_cogl_matrix_stack_flush_to_gl (modelview_stack, COGL_MATRIX_MODELVIEW);
plane[0] = 0;
plane[1] = -1.0;
@ -363,7 +374,7 @@ set_clip_plane (GLint plane_num,
GE( glClipPlane (plane_num, plane) );
#endif
_cogl_matrix_stack_pop (ctx->modelview_stack);
_cogl_matrix_stack_pop (modelview_stack);
}
void
@ -372,7 +383,12 @@ _cogl_set_clip_planes (float x_offset,
float width,
float height)
{
CoglHandle draw_buffer = _cogl_get_draw_buffer ();
CoglMatrixStack *modelview_stack =
_cogl_draw_buffer_get_modelview_stack (draw_buffer);
CoglMatrix modelview_matrix;
CoglMatrixStack *projection_stack =
_cogl_draw_buffer_get_projection_stack (draw_buffer);
CoglMatrix projection_matrix;
float vertex_tl[4] = { x_offset, y_offset, 0, 1.0 };
@ -381,10 +397,8 @@ _cogl_set_clip_planes (float x_offset,
float vertex_br[4] = { x_offset + width, y_offset + height,
0, 1.0 };
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
_cogl_matrix_stack_get (ctx->projection_stack, &projection_matrix);
_cogl_matrix_stack_get (ctx->modelview_stack, &modelview_matrix);
_cogl_matrix_stack_get (projection_stack, &projection_matrix);
_cogl_matrix_stack_get (modelview_stack, &modelview_matrix);
project_vertex (&modelview_matrix, &projection_matrix, vertex_tl);
project_vertex (&modelview_matrix, &projection_matrix, vertex_tr);
@ -422,6 +436,7 @@ _cogl_add_stencil_clip (float x_offset,
gboolean first)
{
CoglHandle current_source;
CoglHandle draw_buffer = _cogl_get_draw_buffer ();
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
@ -429,6 +444,8 @@ _cogl_add_stencil_clip (float x_offset,
* batched geometry before we start... */
_cogl_journal_flush ();
_cogl_draw_buffer_flush_state (draw_buffer, 0);
/* temporarily swap in our special stenciling material */
current_source = cogl_handle_ref (ctx->source_material);
cogl_set_source (ctx->stencil_material);
@ -450,6 +467,11 @@ _cogl_add_stencil_clip (float x_offset,
}
else
{
CoglMatrixStack *modelview_stack =
_cogl_draw_buffer_get_modelview_stack (draw_buffer);
CoglMatrixStack *projection_stack =
_cogl_draw_buffer_get_projection_stack (draw_buffer);
/* Add one to every pixel of the stencil buffer in the
rectangle */
GE( glStencilFunc (GL_NEVER, 0x1, 0x3) );
@ -466,16 +488,16 @@ _cogl_add_stencil_clip (float x_offset,
rectangle are set will be valid */
GE( glStencilOp (GL_DECR, GL_DECR, GL_DECR) );
_cogl_matrix_stack_push (ctx->projection_stack);
_cogl_matrix_stack_load_identity (ctx->projection_stack);
_cogl_matrix_stack_push (projection_stack);
_cogl_matrix_stack_load_identity (projection_stack);
_cogl_matrix_stack_push (ctx->modelview_stack);
_cogl_matrix_stack_load_identity (ctx->modelview_stack);
_cogl_matrix_stack_push (modelview_stack);
_cogl_matrix_stack_load_identity (modelview_stack);
cogl_rectangle (-1.0, -1.0, 1.0, 1.0);
_cogl_matrix_stack_pop (ctx->modelview_stack);
_cogl_matrix_stack_pop (ctx->projection_stack);
_cogl_matrix_stack_pop (modelview_stack);
_cogl_matrix_stack_pop (projection_stack);
}
/* make sure our rectangles hit the stencil buffer before we restore
@ -515,19 +537,32 @@ _cogl_disable_clip_planes (void)
GE( glDisable (GL_CLIP_PLANE0) );
}
/* XXX: This should be deprecated and Cogl should be left to manage
* the glViewport automatically when switching draw buffers. */
void
_cogl_set_viewport (int x,
int y,
int width,
int height)
{
CoglHandle draw_buffer;
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
draw_buffer = _cogl_get_draw_buffer ();
_cogl_draw_buffer_set_viewport (draw_buffer,
x,
y,
width,
height);
}
/* XXX: This should be deprecated, and we should expose a way to also
* specify an x and y viewport offset */
void
cogl_viewport (guint width,
guint height)
{
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
COGL_NOTE (MISC, "glViewport(0, 0, %u, %u)", width, height);
GE( glViewport (0, 0, width, height) );
ctx->viewport_width = width;
ctx->viewport_height = height;
_cogl_set_viewport (0, 0, width, height);
}
void
@ -540,6 +575,7 @@ _cogl_setup_viewport (guint width,
{
float z_camera;
CoglMatrix projection_matrix;
CoglMatrixStack *modelview_stack;
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
@ -593,11 +629,13 @@ _cogl_setup_viewport (guint width,
cogl_get_projection_matrix (&projection_matrix);
z_camera = 0.5 * projection_matrix.xx;
_cogl_matrix_stack_load_identity (ctx->modelview_stack);
_cogl_matrix_stack_translate (ctx->modelview_stack, -0.5f, -0.5f, -z_camera);
_cogl_matrix_stack_scale (ctx->modelview_stack,
modelview_stack =
_cogl_draw_buffer_get_modelview_stack (_cogl_get_draw_buffer ());
_cogl_matrix_stack_load_identity (modelview_stack);
_cogl_matrix_stack_translate (modelview_stack, -0.5f, -0.5f, -z_camera);
_cogl_matrix_stack_scale (modelview_stack,
1.0f / width, -1.0f / height, 1.0f / width);
_cogl_matrix_stack_translate (ctx->modelview_stack,
_cogl_matrix_stack_translate (modelview_stack,
0.0f, -1.0 * height, 0.0f);
}
@ -606,9 +644,6 @@ cogl_get_features (void)
{
_COGL_GET_CONTEXT (ctx, 0);
if (!ctx->features_cached)
_cogl_features_init ();
if (cogl_debug_flags & COGL_DEBUG_DISABLE_VBOS)
ctx->feature_flags &= ~COGL_FEATURE_VBOS;
@ -626,18 +661,24 @@ cogl_features_available (CoglFeatureFlags features)
return (ctx->feature_flags & features) == features;
}
/* XXX: This function should be deprecated, and replaced with a
* cogl_draw_buffer_get_size() API instead. We don't support offset
* viewports, and you can't have floating point viewport sizes. */
/* XXX: This function should either be replaced with one returning
* integers, or removed/deprecated and make the
* _cogl_draw_buffer_get_viewport* functions public.
*/
void
cogl_get_viewport (float v[4])
{
CoglHandle draw_buffer;
int viewport[4];
int i;
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
v[0] = 0;
v[1] = 0;
v[2] = ctx->viewport_width;
v[3] = ctx->viewport_height;
draw_buffer = _cogl_get_draw_buffer ();
_cogl_draw_buffer_get_viewport4fv (draw_buffer, viewport);
for (i = 0; i < 4; i++)
v[i] = viewport[i];
}
void
@ -733,7 +774,7 @@ cogl_disable_fog (void)
void
cogl_flush_gl_state (int flags)
{
_cogl_flush_matrix_stacks ();
_cogl_draw_buffer_flush_state (_cogl_get_draw_buffer (), 0);
}
#endif
@ -752,18 +793,20 @@ cogl_read_pixels (int x,
CoglPixelFormat format,
guint8 *pixels)
{
GLint viewport[4];
GLint viewport_height;
int rowstride = width * 4;
guint8 *temprow;
int viewport_height;
int rowstride = width * 4;
guint8 *temprow;
CoglHandle draw_buffer;
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
g_return_if_fail (format == COGL_PIXEL_FORMAT_RGBA_8888);
g_return_if_fail (source == COGL_READ_PIXELS_COLOR_BUFFER);
temprow = g_alloca (rowstride * sizeof (guint8));
glGetIntegerv (GL_VIEWPORT, viewport);
viewport_height = viewport[3];
draw_buffer = _cogl_get_draw_buffer ();
viewport_height = _cogl_draw_buffer_get_viewport_height (draw_buffer);
/* The y co-ordinate should be given in OpenGL's coordinate system
so 0 is the bottom row */
@ -825,12 +868,13 @@ cogl_begin_gl (void)
/* Flush all batched primitives */
cogl_flush ();
/* Flush our clipping state to GL */
cogl_clip_ensure ();
/* Flush any client side matrix state */
_cogl_flush_matrix_stacks ();
/* Flush framebuffer state, including clip state, modelview and
* projection matrix state
*
* NB: _cogl_draw_buffer_flush_state may disrupt various state (such
* as the material state) when flushing the clip stack, so should
* always be done first when preparing to draw. */
_cogl_draw_buffer_flush_state (_cogl_get_draw_buffer (), 0);
/* Setup the state for the current material */
@ -940,36 +984,41 @@ _cogl_destroy_texture_units (void)
void
cogl_push_matrix (void)
{
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
_cogl_matrix_stack_push (ctx->modelview_stack);
CoglMatrixStack *modelview_stack =
_cogl_draw_buffer_get_modelview_stack (_cogl_get_draw_buffer ());
_cogl_matrix_stack_push (modelview_stack);
}
void
cogl_pop_matrix (void)
{
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
_cogl_matrix_stack_pop (ctx->modelview_stack);
CoglMatrixStack *modelview_stack =
_cogl_draw_buffer_get_modelview_stack (_cogl_get_draw_buffer ());
_cogl_matrix_stack_pop (modelview_stack);
}
void
cogl_scale (float x, float y, float z)
{
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
_cogl_matrix_stack_scale (ctx->modelview_stack, x, y, z);
CoglMatrixStack *modelview_stack =
_cogl_draw_buffer_get_modelview_stack (_cogl_get_draw_buffer ());
_cogl_matrix_stack_scale (modelview_stack, x, y, z);
}
void
cogl_translate (float x, float y, float z)
{
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
_cogl_matrix_stack_translate (ctx->modelview_stack, x, y, z);
CoglMatrixStack *modelview_stack =
_cogl_draw_buffer_get_modelview_stack (_cogl_get_draw_buffer ());
_cogl_matrix_stack_translate (modelview_stack, x, y, z);
}
void
cogl_rotate (float angle, float x, float y, float z)
{
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
_cogl_matrix_stack_rotate (ctx->modelview_stack, angle, x, y, z);
CoglMatrixStack *modelview_stack =
_cogl_draw_buffer_get_modelview_stack (_cogl_get_draw_buffer ());
_cogl_matrix_stack_rotate (modelview_stack, angle, x, y, z);
}
void
@ -997,12 +1046,14 @@ cogl_frustum (float left,
float z_far)
{
float c, d;
CoglMatrixStack *projection_stack =
_cogl_draw_buffer_get_projection_stack (_cogl_get_draw_buffer ());
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
_cogl_matrix_stack_load_identity (ctx->projection_stack);
_cogl_matrix_stack_load_identity (projection_stack);
_cogl_matrix_stack_frustum (ctx->projection_stack,
_cogl_matrix_stack_frustum (projection_stack,
left,
right,
bottom,
@ -1036,12 +1087,14 @@ cogl_ortho (float left,
float z_far)
{
CoglMatrix ortho;
CoglMatrixStack *projection_stack =
_cogl_draw_buffer_get_projection_stack (_cogl_get_draw_buffer ());
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
cogl_matrix_init_identity (&ortho);
cogl_matrix_ortho (&ortho, left, right, bottom, top, z_near, z_far);
_cogl_matrix_stack_set (ctx->projection_stack, &ortho);
_cogl_matrix_stack_set (projection_stack, &ortho);
/* Calculate and store the inverse of the matrix */
memset (ctx->inverse_projection, 0, sizeof (float) * 16);
@ -1060,41 +1113,44 @@ cogl_ortho (float left,
void
cogl_get_modelview_matrix (CoglMatrix *matrix)
{
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
_cogl_matrix_stack_get (ctx->modelview_stack, matrix);
CoglMatrixStack *modelview_stack =
_cogl_draw_buffer_get_modelview_stack (_cogl_get_draw_buffer ());
_cogl_matrix_stack_get (modelview_stack, matrix);
}
void
cogl_set_modelview_matrix (CoglMatrix *matrix)
{
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
_cogl_matrix_stack_set (ctx->modelview_stack, matrix);
CoglMatrixStack *modelview_stack =
_cogl_draw_buffer_get_modelview_stack (_cogl_get_draw_buffer ());
_cogl_matrix_stack_set (modelview_stack, matrix);
}
void
cogl_get_projection_matrix (CoglMatrix *matrix)
{
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
_cogl_matrix_stack_get (ctx->projection_stack, matrix);
CoglMatrixStack *projection_stack =
_cogl_draw_buffer_get_projection_stack (_cogl_get_draw_buffer ());
_cogl_matrix_stack_get (projection_stack, matrix);
}
void
cogl_set_projection_matrix (CoglMatrix *matrix)
{
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
_cogl_matrix_stack_set (ctx->projection_stack, matrix);
CoglMatrixStack *projection_stack =
_cogl_draw_buffer_get_projection_stack (_cogl_get_draw_buffer ());
_cogl_matrix_stack_set (projection_stack, matrix);
/* FIXME: Update the inverse projection matrix!! Presumably use
* of clip planes must currently be broken if this API is used. */
}
void
_cogl_flush_matrix_stacks (void)
CoglClipStackState *
_cogl_get_clip_state (void)
{
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
_cogl_matrix_stack_flush_to_gl (ctx->projection_stack,
COGL_MATRIX_PROJECTION);
_cogl_matrix_stack_flush_to_gl (ctx->modelview_stack,
COGL_MATRIX_MODELVIEW);
CoglHandle draw_buffer;
draw_buffer = _cogl_get_draw_buffer ();
return _cogl_draw_buffer_get_clip_state (draw_buffer);
}

1
cogl/cogl.h.in
View File

@ -867,6 +867,7 @@ void cogl_flush_gl_state (int flags);
/* private */
void _cogl_set_indirect_context (gboolean indirect);
void _cogl_set_viewport (int x, int y, int width, int height);
G_END_DECLS

2
cogl/driver/gl/Makefile.am
View File

@ -25,8 +25,6 @@ libclutter_cogl_driver_la_SOURCES = \
cogl.c \
cogl-primitives.c \
cogl-texture-driver.c \
cogl-fbo.h \
cogl-fbo.c \
cogl-shader-private.h \
cogl-shader.c \
cogl-program.h \

19
cogl/driver/gl/cogl-context-driver.c
View File

@ -30,15 +30,16 @@
void
_cogl_create_context_driver (CoglContext *_context)
{
_context->drv.pf_glGenRenderbuffersEXT = NULL;
_context->drv.pf_glBindRenderbufferEXT = NULL;
_context->drv.pf_glRenderbufferStorageEXT = NULL;
_context->drv.pf_glGenFramebuffersEXT = NULL;
_context->drv.pf_glBindFramebufferEXT = NULL;
_context->drv.pf_glFramebufferTexture2DEXT = NULL;
_context->drv.pf_glFramebufferRenderbufferEXT = NULL;
_context->drv.pf_glCheckFramebufferStatusEXT = NULL;
_context->drv.pf_glDeleteFramebuffersEXT = NULL;
_context->drv.pf_glGenRenderbuffers = NULL;
_context->drv.pf_glBindRenderbuffer = NULL;
_context->drv.pf_glRenderbufferStorage = NULL;
_context->drv.pf_glGenFramebuffers = NULL;
_context->drv.pf_glBindFramebuffer = NULL;
_context->drv.pf_glFramebufferTexture2D = NULL;
_context->drv.pf_glFramebufferRenderbuffer = NULL;
_context->drv.pf_glCheckFramebufferStatus = NULL;
_context->drv.pf_glDeleteFramebuffers = NULL;
_context->drv.pf_glBlitFramebufferEXT = NULL;
_context->drv.pf_glRenderbufferStorageMultisampleEXT = NULL;

23
cogl/driver/gl/cogl-context-driver.h
View File

@ -29,19 +29,20 @@
typedef struct _CoglContextDriver
{
/* Relying on glext.h to define these */
COGL_PFNGLGENRENDERBUFFERSEXTPROC pf_glGenRenderbuffersEXT;
COGL_PFNGLDELETERENDERBUFFERSEXTPROC pf_glDeleteRenderbuffersEXT;
COGL_PFNGLBINDRENDERBUFFEREXTPROC pf_glBindRenderbufferEXT;
COGL_PFNGLRENDERBUFFERSTORAGEEXTPROC pf_glRenderbufferStorageEXT;
COGL_PFNGLGENFRAMEBUFFERSEXTPROC pf_glGenFramebuffersEXT;
COGL_PFNGLBINDFRAMEBUFFEREXTPROC pf_glBindFramebufferEXT;
COGL_PFNGLFRAMEBUFFERTEXTURE2DEXTPROC pf_glFramebufferTexture2DEXT;
COGL_PFNGLFRAMEBUFFERRENDERBUFFEREXTPROC pf_glFramebufferRenderbufferEXT;
COGL_PFNGLCHECKFRAMEBUFFERSTATUSEXTPROC pf_glCheckFramebufferStatusEXT;
COGL_PFNGLDELETEFRAMEBUFFERSEXTPROC pf_glDeleteFramebuffersEXT;
COGL_PFNGLGENRENDERBUFFERSPROC pf_glGenRenderbuffers;
COGL_PFNGLDELETERENDERBUFFERSPROC pf_glDeleteRenderbuffers;
COGL_PFNGLBINDRENDERBUFFERPROC pf_glBindRenderbuffer;
COGL_PFNGLRENDERBUFFERSTORAGEPROC pf_glRenderbufferStorage;
COGL_PFNGLGENFRAMEBUFFERSPROC pf_glGenFramebuffers;
COGL_PFNGLBINDFRAMEBUFFERPROC pf_glBindFramebuffer;
COGL_PFNGLFRAMEBUFFERTEXTURE2DPROC pf_glFramebufferTexture2D;
COGL_PFNGLFRAMEBUFFERRENDERBUFFERPROC pf_glFramebufferRenderbuffer;
COGL_PFNGLCHECKFRAMEBUFFERSTATUSPROC pf_glCheckFramebufferStatus;
COGL_PFNGLDELETEFRAMEBUFFERSPROC pf_glDeleteFramebuffers;
COGL_PFNGLGENERATEMIPMAPPROC pf_glGenerateMipmap;
COGL_PFNGLBLITFRAMEBUFFEREXTPROC pf_glBlitFramebufferEXT;
COGL_PFNGLRENDERBUFFERSTORAGEMULTISAMPLEEXTPROC pf_glRenderbufferStorageMultisampleEXT;
COGL_PFNGLGENERATEMIPMAPEXTPROC pf_glGenerateMipmapEXT;
COGL_PFNGLCREATEPROGRAMOBJECTARBPROC pf_glCreateProgramObjectARB;
COGL_PFNGLCREATESHADEROBJECTARBPROC pf_glCreateShaderObjectARB;

28
cogl/driver/gl/cogl-defines.h.in
View File

@ -698,34 +698,34 @@ G_BEGIN_DECLS
#endif
typedef void
(APIENTRYP COGL_PFNGLGENRENDERBUFFERSEXTPROC)
(APIENTRYP COGL_PFNGLGENRENDERBUFFERSPROC)
(GLsizei n,
GLuint *renderbuffers);
typedef void
(APIENTRYP COGL_PFNGLBINDRENDERBUFFEREXTPROC)
(APIENTRYP COGL_PFNGLBINDRENDERBUFFERPROC)
(GLenum target,
GLuint renderbuffer);
typedef void
(APIENTRYP COGL_PFNGLRENDERBUFFERSTORAGEEXTPROC)
(APIENTRYP COGL_PFNGLRENDERBUFFERSTORAGEPROC)
(GLenum target,
GLenum internalformat,
GLsizei width,
GLsizei height);
typedef void
(APIENTRYP COGL_PFNGLGENFRAMEBUFFERSEXTPROC)
(APIENTRYP COGL_PFNGLGENFRAMEBUFFERSPROC)
(GLsizei n,
GLuint *framebuffers);
typedef void
(APIENTRYP COGL_PFNGLBINDFRAMEBUFFEREXTPROC)
(APIENTRYP COGL_PFNGLBINDFRAMEBUFFERPROC)
(GLenum target,
GLuint framebuffer);
typedef void
(APIENTRYP COGL_PFNGLFRAMEBUFFERTEXTURE2DEXTPROC)
(APIENTRYP COGL_PFNGLFRAMEBUFFERTEXTURE2DPROC)
(GLenum target,
GLenum attachment,
GLenum textarget,
@ -733,26 +733,30 @@ typedef void
GLint level);
typedef void
(APIENTRYP COGL_PFNGLFRAMEBUFFERRENDERBUFFEREXTPROC)
(APIENTRYP COGL_PFNGLFRAMEBUFFERRENDERBUFFERPROC)
(GLenum target,
GLenum attachment,
GLenum renderbuffertarget,
GLuint renderbuffer);
typedef GLenum
(APIENTRYP COGL_PFNGLCHECKFRAMEBUFFERSTATUSEXTPROC)
(APIENTRYP COGL_PFNGLCHECKFRAMEBUFFERSTATUSPROC)
(GLenum target);
typedef void
(APIENTRYP COGL_PFNGLDELETEFRAMEBUFFERSEXTPROC)
(APIENTRYP COGL_PFNGLDELETEFRAMEBUFFERSPROC)
(GLsizei n,
const GLuint *framebuffers);
typedef void
(APIENTRYP COGL_PFNGLDELETERENDERBUFFERSEXTPROC)
(APIENTRYP COGL_PFNGLDELETERENDERBUFFERSPROC)
(GLsizei n,
const GLuint *renderbuffers);
typedef void
(APIENTRYP COGL_PFNGLGENERATEMIPMAPPROC)
(GLenum target);
typedef void
(APIENTRYP COGL_PFNGLBLITFRAMEBUFFEREXTPROC)
(GLint srcX0,
@ -774,10 +778,6 @@ typedef void
GLsizei width,
GLsizei height);
typedef void
(APIENTRYP COGL_PFNGLGENERATEMIPMAPEXTPROC)
(GLenum target);
typedef GLhandleARB
(APIENTRYP COGL_PFNGLCREATEPROGRAMOBJECTARBPROC)
(void);

315
cogl/driver/gl/cogl-fbo.c
View File

@ -1,315 +0,0 @@
/*
* Cogl
*
* An object oriented GL/GLES Abstraction/Utility Layer
*
* Copyright (C) 2007,2008,2009 Intel Corporation.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "cogl.h"
#include "cogl-internal.h"
#include "cogl-util.h"
#include "cogl-texture-private.h"
#include "cogl-fbo.h"
#include "cogl-context.h"
#include "cogl-handle.h"
/* Expecting EXT functions not to be defined - redirect to pointers in context */
#define glGenRenderbuffersEXT ctx->drv.pf_glGenRenderbuffersEXT
#define glDeleteRenderbuffersEXT ctx->drv.pf_glDeleteRenderbuffersEXT
#define glBindRenderbufferEXT ctx->drv.pf_glBindRenderbufferEXT
#define glRenderbufferStorageEXT ctx->drv.pf_glRenderbufferStorageEXT
#define glGenFramebuffersEXT ctx->drv.pf_glGenFramebuffersEXT
#define glBindFramebufferEXT ctx->drv.pf_glBindFramebufferEXT
#define glFramebufferTexture2DEXT ctx->drv.pf_glFramebufferTexture2DEXT
#define glFramebufferRenderbufferEXT ctx->drv.pf_glFramebufferRenderbufferEXT
#define glCheckFramebufferStatusEXT ctx->drv.pf_glCheckFramebufferStatusEXT
#define glDeleteFramebuffersEXT ctx->drv.pf_glDeleteFramebuffersEXT
#define glBlitFramebufferEXT ctx->drv.pf_glBlitFramebufferEXT
#define glRenderbufferStorageMultisampleEXT ctx->drv.pf_glRenderbufferStorageMultisampleEXT
#ifndef GL_READ_FRAMEBUFFER_EXT
#define GL_READ_FRAMEBUFFER_EXT 0x8CA8
#endif
#ifndef GL_DRAW_FRAMEBUFFER_EXT
#define GL_DRAW_FRAMEBUFFER_EXT 0x8CA9
#endif
static void _cogl_offscreen_free (CoglFbo *fbo);
COGL_HANDLE_DEFINE (Fbo, offscreen);
CoglHandle
cogl_offscreen_new_to_texture (CoglHandle texhandle)
{
CoglFbo *fbo;
int width;
int height;
GLuint tex_gl_handle;
GLenum tex_gl_target;
GLuint fbo_gl_handle;
GLuint gl_stencil_handle;
GLenum status;
_COGL_GET_CONTEXT (ctx, COGL_INVALID_HANDLE);
if (!cogl_features_available (COGL_FEATURE_OFFSCREEN))
return COGL_INVALID_HANDLE;
/* Make texhandle is a valid texture object */
if (!cogl_is_texture (texhandle))
return COGL_INVALID_HANDLE;
/* The texture must not be sliced */
if (cogl_texture_is_sliced (texhandle))
return COGL_INVALID_HANDLE;
/* Pick the single texture slice width, height and GL id */
width = cogl_texture_get_width (texhandle);
height = cogl_texture_get_height (texhandle);
if (!cogl_texture_get_gl_texture (texhandle, &tex_gl_handle, &tex_gl_target))
return COGL_INVALID_HANDLE;
if (tex_gl_target != GL_TEXTURE_2D)
return COGL_INVALID_HANDLE;
/* Create a renderbuffer for stenciling */
GE( glGenRenderbuffersEXT (1, &gl_stencil_handle) );
GE( glBindRenderbufferEXT (GL_RENDERBUFFER_EXT, gl_stencil_handle) );
GE( glRenderbufferStorageEXT (GL_RENDERBUFFER_EXT, GL_STENCIL_INDEX8_EXT,
cogl_texture_get_width (texhandle),
cogl_texture_get_height (texhandle)) );
GE( glBindRenderbufferEXT (GL_RENDERBUFFER_EXT, 0) );
/* Generate framebuffer */
glGenFramebuffersEXT (1, &fbo_gl_handle);
GE( glBindFramebufferEXT (GL_FRAMEBUFFER_EXT, fbo_gl_handle) );
GE( glFramebufferTexture2DEXT (GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT,
tex_gl_target, tex_gl_handle, 0) );
GE( glFramebufferRenderbufferEXT (GL_FRAMEBUFFER_EXT,
GL_STENCIL_ATTACHMENT_EXT,
GL_RENDERBUFFER_EXT, gl_stencil_handle) );
/* XXX: The framebuffer_object spec isn't clear in defining whether attaching
* a texture as a renderbuffer with mipmap filtering enabled while the
* mipmaps have not been uploaded should result in an incomplete framebuffer
* object. (different drivers make different decisions)
*
* To avoid an error with drivers that do consider this a problem we
* explicitly set non mipmapped filters here. These will later be reset when
* the texture is actually used for rendering according to the filters set on
* the corresponding CoglMaterial.
*/
_cogl_texture_set_filters (texhandle, GL_NEAREST, GL_NEAREST);
/* Make sure it's complete */
status = glCheckFramebufferStatusEXT (GL_FRAMEBUFFER_EXT);
if (status != GL_FRAMEBUFFER_COMPLETE_EXT)
{
/* Stencil renderbuffers aren't always supported. Try again
without the stencil buffer */
GE( glFramebufferRenderbufferEXT (GL_FRAMEBUFFER_EXT,
GL_STENCIL_ATTACHMENT_EXT,
GL_RENDERBUFFER_EXT,
0) );
GE( glDeleteRenderbuffersEXT (1, &gl_stencil_handle) );
gl_stencil_handle = 0;
status = glCheckFramebufferStatusEXT (GL_FRAMEBUFFER_EXT);
if (status != GL_FRAMEBUFFER_COMPLETE_EXT)
{
/* Still failing, so give up */
GE( glDeleteFramebuffersEXT (1, &fbo_gl_handle) );
GE( glBindFramebufferEXT (GL_FRAMEBUFFER_EXT, 0) );
return COGL_INVALID_HANDLE;
}
}
GE( glBindFramebufferEXT (GL_FRAMEBUFFER_EXT, 0) );
/* Allocate and init a CoglFbo object (store non-wasted size
for subsequent blits and viewport setup) */
fbo = (CoglFbo*) g_malloc (sizeof (CoglFbo));
fbo->width = width;
fbo->height = height;
fbo->gl_handle = fbo_gl_handle;
fbo->gl_stencil_handle = gl_stencil_handle;
return _cogl_offscreen_handle_new (fbo);
}
static void
_cogl_offscreen_free (CoglFbo *fbo)
{
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
/* Frees FBO resources but its handle is not
released! Do that separately before this! */
if (fbo->gl_stencil_handle)
GE( glDeleteRenderbuffersEXT (1, &fbo->gl_stencil_handle) );
GE( glDeleteFramebuffersEXT (1, &fbo->gl_handle) );
g_free (fbo);
}
void
cogl_set_draw_buffer (CoglBufferTarget target, CoglHandle offscreen)
{
CoglFbo *fbo = NULL;
CoglDrawBufferState *draw_buffer;
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
_cogl_journal_flush ();
g_assert (ctx->draw_buffer_stack != NULL);
draw_buffer = ctx->draw_buffer_stack->data;
if (target == COGL_OFFSCREEN_BUFFER)
{
/* Make sure it is a valid fbo handle */
if (!cogl_is_offscreen (offscreen))
return;
fbo = _cogl_offscreen_pointer_from_handle (offscreen);
/* Check current draw buffer target */
if (draw_buffer->target != COGL_OFFSCREEN_BUFFER)
{
/* Push the viewport and matrix setup if redirecting
from a non-screen buffer */
GE( glPushAttrib (GL_VIEWPORT_BIT) );
_cogl_matrix_stack_push (ctx->projection_stack);
_cogl_matrix_stack_load_identity (ctx->projection_stack);
_cogl_matrix_stack_push (ctx->modelview_stack);
_cogl_matrix_stack_load_identity (ctx->modelview_stack);
}
else
{
/* Override viewport and matrix setup if redirecting
from another offscreen buffer */
_cogl_matrix_stack_load_identity (ctx->projection_stack);
_cogl_matrix_stack_load_identity (ctx->modelview_stack);
}
/* Setup new viewport and matrices */
cogl_viewport (fbo->width, fbo->height);
_cogl_matrix_stack_translate (ctx->modelview_stack, -1.0f, -1.0f, 0.0f);
_cogl_matrix_stack_scale (ctx->modelview_stack, 2.0f / fbo->width, 2.0f / fbo->height, 1.0f);
/* Bind offscreen framebuffer object */
GE( glBindFramebufferEXT (GL_FRAMEBUFFER_EXT, fbo->gl_handle) );
GE( glColorMask (GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE) );
}
else if (target & COGL_WINDOW_BUFFER)
{
/* Check current draw buffer target */
if (draw_buffer->target == COGL_OFFSCREEN_BUFFER)
{
/* Pop viewport and matrices if redirecting back
from an offscreen buffer */
GE( glPopAttrib () );
_cogl_matrix_stack_pop (ctx->projection_stack);
_cogl_matrix_stack_pop (ctx->modelview_stack);
}
/* Bind window framebuffer object */
GE( glBindFramebufferEXT (GL_FRAMEBUFFER_EXT, 0) );
}
/* Store new target */
draw_buffer->target = target;
if (draw_buffer->offscreen != offscreen)
{
if (draw_buffer->offscreen != COGL_INVALID_HANDLE)
cogl_handle_unref (draw_buffer->offscreen);
if (offscreen != COGL_INVALID_HANDLE)
cogl_handle_ref (offscreen);
draw_buffer->offscreen = offscreen;
}
}
void
cogl_push_draw_buffer(void)
{
CoglDrawBufferState *old;
CoglDrawBufferState *draw_buffer;
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
g_assert (ctx->draw_buffer_stack != NULL);
old = ctx->draw_buffer_stack->data;
draw_buffer = g_slice_new0 (CoglDrawBufferState);
*draw_buffer = *old;
ctx->draw_buffer_stack =
g_slist_prepend (ctx->draw_buffer_stack, draw_buffer);
}
void
cogl_pop_draw_buffer(void)
{
CoglDrawBufferState *to_pop;
CoglDrawBufferState *to_restore;
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
g_assert (ctx->draw_buffer_stack != NULL);
if (ctx->draw_buffer_stack->next == NULL)
{
g_warning ("1 more cogl_pop_draw_buffer() than cogl_push_draw_buffer()");
return;
}
to_pop = ctx->draw_buffer_stack->data;
to_restore = ctx->draw_buffer_stack->next->data;
/* the logic in cogl_set_draw_buffer() only works if
* to_pop is still on top of the stack, because
* cogl_set_draw_buffer() needs to know the previous
* state.
*/
cogl_set_draw_buffer (to_restore->target, to_restore->offscreen);
/* cogl_set_draw_buffer() should have set top of stack
* to to_restore
*/
g_assert (to_restore->target == to_pop->target);
g_assert (to_restore->offscreen == to_pop->offscreen);
g_assert (ctx->draw_buffer_stack->data == to_pop);
ctx->draw_buffer_stack =
g_slist_remove_link (ctx->draw_buffer_stack,
ctx->draw_buffer_stack);
g_slice_free (CoglDrawBufferState, to_pop);
}

39
cogl/driver/gl/cogl-fbo.h
View File

@ -1,39 +0,0 @@
/*
* Cogl
*
* An object oriented GL/GLES Abstraction/Utility Layer
*
* Copyright (C) 2007,2008,2009 Intel Corporation.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __COGL_FBO_H
#define __COGL_FBO_H
#include "cogl-handle.h"
typedef struct
{
CoglHandleObject _parent;
int width;
int height;
GLuint gl_handle;
GLuint gl_stencil_handle;
} CoglFbo;
#endif /* __COGL_FBO_H */

99
cogl/driver/gl/cogl-primitives.c
View File

@ -30,6 +30,8 @@
#include "cogl-context.h"
#include "cogl-clip-stack.h"
#include "cogl-material-private.h"
#include "cogl-clip-stack.h"
#include "cogl-draw-buffer-private.h"
#include <string.h>
#include <gmodule.h>
@ -74,7 +76,7 @@ _cogl_path_add_node (gboolean new_sub_path,
}
void
_cogl_path_stroke_nodes ()
_cogl_path_stroke_nodes (void)
{
guint path_start = 0;
gulong enable_flags = COGL_ENABLE_VERTEX_ARRAY;
@ -82,6 +84,13 @@ _cogl_path_stroke_nodes ()
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
_cogl_journal_flush ();
/* NB: _cogl_draw_buffer_flush_state may disrupt various state (such
* as the material state) when flushing the clip stack, so should
* always be done first when preparing to draw. */
_cogl_draw_buffer_flush_state (_cogl_get_draw_buffer (), 0);
enable_flags |= _cogl_material_get_cogl_enable_flags (ctx->source_material);
cogl_enable (enable_flags);
@ -90,7 +99,6 @@ _cogl_path_stroke_nodes ()
options.disable_layers = (guint32)~0;
_cogl_material_flush_gl_state (ctx->source_material, &options);
_cogl_flush_matrix_stacks ();
while (path_start < ctx->path_nodes->len)
{
@ -127,20 +135,33 @@ _cogl_add_path_to_stencil_buffer (floatVec2 nodes_min,
CoglPathNode *path,
gboolean merge)
{
guint path_start = 0;
guint sub_path_num = 0;
float bounds_x;
float bounds_y;
float bounds_w;
float bounds_h;
gulong enable_flags = COGL_ENABLE_VERTEX_ARRAY;
CoglHandle prev_source;
int i;
guint path_start = 0;
guint sub_path_num = 0;
float bounds_x;
float bounds_y;
float bounds_w;
float bounds_h;
gulong enable_flags = COGL_ENABLE_VERTEX_ARRAY;
CoglHandle prev_source;
int i;
CoglHandle draw_buffer = _cogl_get_draw_buffer ();
CoglMatrixStack *modelview_stack =
_cogl_draw_buffer_get_modelview_stack (draw_buffer);
CoglMatrixStack *projection_stack =
_cogl_draw_buffer_get_projection_stack (draw_buffer);
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
/* We don't track changes to the stencil buffer in the journal
* so we need to flush any batched geometry first */
_cogl_journal_flush ();
/* NB: _cogl_draw_buffer_flush_state may disrupt various state (such
* as the material state) when flushing the clip stack, so should
* always be done first when preparing to draw. */
_cogl_draw_buffer_flush_state (draw_buffer, 0);
/* Just setup a simple material that doesn't use texturing... */
prev_source = cogl_handle_ref (ctx->source_material);
cogl_set_source (ctx->stencil_material);
@ -161,7 +182,7 @@ _cogl_add_path_to_stencil_buffer (floatVec2 nodes_min,
}
else
{
GE( glClear (GL_STENCIL_BUFFER_BIT) );
cogl_clear (NULL, COGL_BUFFER_BIT_STENCIL);
GE( glStencilMask (1) );
GE( glStencilFunc (GL_LEQUAL, 0x1, 0x3) );
}
@ -179,8 +200,6 @@ _cogl_add_path_to_stencil_buffer (floatVec2 nodes_min,
}
ctx->n_texcoord_arrays_enabled = 0;
_cogl_flush_matrix_stacks ();
while (path_start < path_size)
{
GE( glVertexPointer (2, GL_FLOAT, sizeof (CoglPathNode),
@ -194,8 +213,17 @@ _cogl_add_path_to_stencil_buffer (floatVec2 nodes_min,
significant bit */
GE( glStencilMask (merge ? 6 : 3) );
GE( glStencilOp (GL_ZERO, GL_REPLACE, GL_REPLACE) );
glRectf (bounds_x, bounds_y,
bounds_x + bounds_w, bounds_y + bounds_h);
cogl_rectangle (bounds_x, bounds_y,
bounds_x + bounds_w, bounds_y + bounds_h);
/* Make sure the rectangle hits the stencil buffer before
* directly changing other GL state. */
_cogl_journal_flush ();
/* NB: The journal flushing may trash the modelview state and
* enable flags */
_cogl_matrix_stack_flush_to_gl (modelview_stack,
COGL_MATRIX_MODELVIEW);
cogl_enable (enable_flags);
GE( glStencilOp (GL_INVERT, GL_INVERT, GL_INVERT) );
}
@ -216,19 +244,24 @@ _cogl_add_path_to_stencil_buffer (floatVec2 nodes_min,
/* Decrement all of the bits twice so that only pixels where the
value is 3 will remain */
_cogl_matrix_stack_push (ctx->projection_stack);
_cogl_matrix_stack_load_identity (ctx->projection_stack);
_cogl_matrix_stack_push (projection_stack);
_cogl_matrix_stack_load_identity (projection_stack);
_cogl_matrix_stack_flush_to_gl (projection_stack,
COGL_MATRIX_PROJECTION);
_cogl_matrix_stack_push (ctx->modelview_stack);
_cogl_matrix_stack_load_identity (ctx->modelview_stack);
_cogl_matrix_stack_push (modelview_stack);
_cogl_matrix_stack_load_identity (modelview_stack);
_cogl_matrix_stack_flush_to_gl (modelview_stack,
COGL_MATRIX_MODELVIEW);
_cogl_flush_matrix_stacks ();
cogl_rectangle (-1.0, -1.0, 1.0, 1.0);
cogl_rectangle (-1.0, -1.0, 1.0, 1.0);
/* Make sure these rectangles hit the stencil buffer before we
* restore the stencil op/func. */
_cogl_journal_flush ();
glRectf (-1.0, -1.0, 1.0, 1.0);
glRectf (-1.0, -1.0, 1.0, 1.0);
_cogl_matrix_stack_pop (ctx->modelview_stack);
_cogl_matrix_stack_pop (ctx->projection_stack);
_cogl_matrix_stack_pop (modelview_stack);
_cogl_matrix_stack_pop (projection_stack);
}
GE( glStencilMask (~(GLuint) 0) );
@ -244,8 +277,10 @@ _cogl_add_path_to_stencil_buffer (floatVec2 nodes_min,
}
void
_cogl_path_fill_nodes ()
_cogl_path_fill_nodes (void)
{
CoglHandle draw_buffer;
CoglClipStackState *clip_state;
float bounds_x;
float bounds_y;
float bounds_w;
@ -253,6 +288,11 @@ _cogl_path_fill_nodes ()
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
_cogl_journal_flush ();
draw_buffer = _cogl_get_draw_buffer ();
clip_state = _cogl_draw_buffer_get_clip_state (draw_buffer);
_cogl_path_get_bounds (ctx->path_nodes_min, ctx->path_nodes_max,
&bounds_x, &bounds_y, &bounds_w, &bounds_h);
@ -261,12 +301,13 @@ _cogl_path_fill_nodes ()
ctx->path_nodes->len,
&g_array_index (ctx->path_nodes,
CoglPathNode, 0),
ctx->clip.stencil_used);
clip_state->stencil_used);
cogl_rectangle (bounds_x, bounds_y,
bounds_x + bounds_w, bounds_y + bounds_h);
/* The stencil buffer now contains garbage so the clip area needs to
be rebuilt */
ctx->clip.stack_dirty = TRUE;
_cogl_clip_stack_state_dirty (clip_state);
}

2
cogl/driver/gl/cogl-texture-driver.c
View File

@ -45,7 +45,7 @@
#include <stdlib.h>
#include <math.h>
#define glGenerateMipmap ctx->drv.pf_glGenerateMipmapEXT
#define glGenerateMipmap ctx->drv.pf_glGenerateMipmap
void
_cogl_texture_driver_bind (GLenum gl_target,

110
cogl/driver/gl/cogl.c
View File

@ -32,6 +32,12 @@
#include "cogl-internal.h"
#include "cogl-context.h"
typedef struct _CoglGLSymbolTableEntry
{
const char *name;
void *ptr;
} CoglGLSymbolTableEntry;
gboolean
cogl_check_extension (const gchar *name, const gchar *ext)
{
@ -57,6 +63,26 @@ cogl_check_extension (const gchar *name, const gchar *ext)
return FALSE;
}
gboolean
_cogl_resolve_gl_symbols (CoglGLSymbolTableEntry *symbol_table,
const char *suffix)
{
int i;
gboolean status = TRUE;
for (i = 0; symbol_table[i].name; i++)
{
char *full_name = g_strdup_printf ("%s%s", symbol_table[i].name, suffix);
*((CoglFuncPtr *)symbol_table[i].ptr) = cogl_get_proc_address (full_name);
g_free (full_name);
if (!*((CoglFuncPtr *)symbol_table[i].ptr))
{
status = FALSE;
break;
}
}
return status;
}
#ifdef HAVE_CLUTTER_OSX
static gboolean
really_enable_npot (void)
@ -90,6 +116,9 @@ _cogl_features_init (void)
const gchar *gl_extensions;
GLint max_clip_planes = 0;
GLint num_stencil_bits = 0;
gboolean fbo_ARB = FALSE;
gboolean fbo_EXT = FALSE;
const char *suffix;
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
@ -284,64 +313,35 @@ _cogl_features_init (void)
flags |= COGL_FEATURE_SHADERS_GLSL;
}
if (cogl_check_extension ("GL_EXT_framebuffer_object", gl_extensions) ||
cogl_check_extension ("GL_ARB_framebuffer_object", gl_extensions))
fbo_ARB = cogl_check_extension ("GL_ARB_framebuffer_object", gl_extensions);
if (fbo_ARB)
suffix = "";
else
{
ctx->drv.pf_glGenRenderbuffersEXT =
(COGL_PFNGLGENRENDERBUFFERSEXTPROC)
cogl_get_proc_address ("glGenRenderbuffersEXT");
fbo_EXT = cogl_check_extension ("GL_EXT_framebuffer_object", gl_extensions);
if (fbo_EXT)
suffix = "EXT";
}
ctx->drv.pf_glDeleteRenderbuffersEXT =
(COGL_PFNGLDELETERENDERBUFFERSEXTPROC)
cogl_get_proc_address ("glDeleteRenderbuffersEXT");
if (fbo_ARB || fbo_EXT)
{
CoglGLSymbolTableEntry symbol_table[] = {
{"glGenRenderbuffers", &ctx->drv.pf_glGenRenderbuffers},
{"glDeleteRenderbuffers", &ctx->drv.pf_glDeleteRenderbuffers},
{"glBindRenderbuffer", &ctx->drv.pf_glBindRenderbuffer},
{"glRenderbufferStorage", &ctx->drv.pf_glRenderbufferStorage},
{"glGenFramebuffers", &ctx->drv.pf_glGenFramebuffers},
{"glBindFramebuffer", &ctx->drv.pf_glBindFramebuffer},
{"glFramebufferTexture2D", &ctx->drv.pf_glFramebufferTexture2D},
{"glFramebufferRenderbuffer", &ctx->drv.pf_glFramebufferRenderbuffer},
{"glCheckFramebufferStatus", &ctx->drv.pf_glCheckFramebufferStatus},
{"glDeleteFramebuffers", &ctx->drv.pf_glDeleteFramebuffers},
{"glGenerateMipmap", &ctx->drv.pf_glGenerateMipmap},
{NULL, NULL}
};
ctx->drv.pf_glBindRenderbufferEXT =
(COGL_PFNGLBINDRENDERBUFFEREXTPROC)
cogl_get_proc_address ("glBindRenderbufferEXT");
ctx->drv.pf_glRenderbufferStorageEXT =
(COGL_PFNGLRENDERBUFFERSTORAGEEXTPROC)
cogl_get_proc_address ("glRenderbufferStorageEXT");
ctx->drv.pf_glGenFramebuffersEXT =
(COGL_PFNGLGENFRAMEBUFFERSEXTPROC)
cogl_get_proc_address ("glGenFramebuffersEXT");
ctx->drv.pf_glBindFramebufferEXT =
(COGL_PFNGLBINDFRAMEBUFFEREXTPROC)
cogl_get_proc_address ("glBindFramebufferEXT");
ctx->drv.pf_glFramebufferTexture2DEXT =
(COGL_PFNGLFRAMEBUFFERTEXTURE2DEXTPROC)
cogl_get_proc_address ("glFramebufferTexture2DEXT");
ctx->drv.pf_glFramebufferRenderbufferEXT =
(COGL_PFNGLFRAMEBUFFERRENDERBUFFEREXTPROC)
cogl_get_proc_address ("glFramebufferRenderbufferEXT");
ctx->drv.pf_glCheckFramebufferStatusEXT =
(COGL_PFNGLCHECKFRAMEBUFFERSTATUSEXTPROC)
cogl_get_proc_address ("glCheckFramebufferStatusEXT");
ctx->drv.pf_glDeleteFramebuffersEXT =
(COGL_PFNGLDELETEFRAMEBUFFERSEXTPROC)
cogl_get_proc_address ("glDeleteFramebuffersEXT");
ctx->drv.pf_glGenerateMipmapEXT =
(COGL_PFNGLGENERATEMIPMAPEXTPROC)
cogl_get_proc_address ("glGenerateMipmapEXT");
if (ctx->drv.pf_glGenRenderbuffersEXT &&
ctx->drv.pf_glBindRenderbufferEXT &&
ctx->drv.pf_glRenderbufferStorageEXT &&
ctx->drv.pf_glGenFramebuffersEXT &&
ctx->drv.pf_glBindFramebufferEXT &&
ctx->drv.pf_glFramebufferTexture2DEXT &&
ctx->drv.pf_glFramebufferRenderbufferEXT &&
ctx->drv.pf_glCheckFramebufferStatusEXT &&
ctx->drv.pf_glDeleteFramebuffersEXT &&
ctx->drv.pf_glGenerateMipmapEXT)
flags |= COGL_FEATURE_OFFSCREEN;
if (_cogl_resolve_gl_symbols (symbol_table, suffix))
flags |= COGL_FEATURE_OFFSCREEN;
}
if (cogl_check_extension ("GL_EXT_framebuffer_blit", gl_extensions))

2
cogl/driver/gles/Makefile.am
View File

@ -22,11 +22,9 @@ libclutter_cogl_driver_la_CPPFLAGS = \
$(CLUTTER_DEBUG_CFLAGS) \
$(MAINTAINER_CFLAGS)
libclutter_cogl_driver_la_SOURCES = \
cogl-fbo.h \
cogl.c \
cogl-primitives.c \
cogl-texture-driver.c \
cogl-fbo.c \
cogl-context-driver.c \
cogl-context-driver.h \
cogl-gles2-wrapper.h \

10
cogl/driver/gles/cogl-context-driver.c
View File

@ -31,6 +31,16 @@
void
_cogl_create_context_driver (CoglContext *context)
{
context->drv.pf_glGenRenderbuffers = NULL;
context->drv.pf_glBindRenderbuffer = NULL;
context->drv.pf_glRenderbufferStorage = NULL;
context->drv.pf_glGenFramebuffers = NULL;
context->drv.pf_glBindFramebuffer = NULL;
context->drv.pf_glFramebufferTexture2D = NULL;
context->drv.pf_glFramebufferRenderbuffer = NULL;
context->drv.pf_glCheckFramebufferStatus = NULL;
context->drv.pf_glDeleteFramebuffers = NULL;
/* Init the GLES2 wrapper */
#ifdef HAVE_COGL_GLES2
cogl_gles2_wrapper_init (&context->drv.gles2);

17
cogl/driver/gles/cogl-context-driver.h
View File

@ -24,17 +24,26 @@
#ifndef __COGL_CONTEXT_DRIVER_H
#define __COGL_CONTEXT_DRIVER_H
#include "cogl.h"
#include "cogl-gles2-wrapper.h"
typedef struct _CoglContextDriver
{
COGL_PFNGLGENRENDERBUFFERSPROC pf_glGenRenderbuffers;
COGL_PFNGLDELETERENDERBUFFERSPROC pf_glDeleteRenderbuffers;
COGL_PFNGLBINDRENDERBUFFERPROC pf_glBindRenderbuffer;
COGL_PFNGLRENDERBUFFERSTORAGEPROC pf_glRenderbufferStorage;
COGL_PFNGLGENFRAMEBUFFERSPROC pf_glGenFramebuffers;
COGL_PFNGLBINDFRAMEBUFFERPROC pf_glBindFramebuffer;
COGL_PFNGLFRAMEBUFFERTEXTURE2DPROC pf_glFramebufferTexture2D;
COGL_PFNGLFRAMEBUFFERRENDERBUFFERPROC pf_glFramebufferRenderbuffer;
COGL_PFNGLCHECKFRAMEBUFFERSTATUSPROC pf_glCheckFramebufferStatus;
COGL_PFNGLDELETEFRAMEBUFFERSPROC pf_glDeleteFramebuffers;
COGL_PFNGLGENERATEMIPMAPPROC pf_glGenerateMipmap;
#ifdef HAVE_COGL_GLES2
CoglGles2Wrapper gles2;
/* Viewport store for FBOs. Needed because glPushAttrib() isn't
supported */
GLint viewport_store[4];
#endif
} CoglContextDriver;

70
cogl/driver/gles/cogl-defines.h.in
View File

@ -633,6 +633,76 @@ G_BEGIN_DECLS
#define CGL_SHININESS 0x1601
#endif
/* Extension function prototypes */
#ifndef APIENTRY
#define APIENTRY
#endif
#ifndef APIENTRYP
#define APIENTRYP APIENTRY *
#endif
typedef void
(APIENTRYP COGL_PFNGLGENRENDERBUFFERSPROC)
(GLsizei n,
GLuint *renderbuffers);
typedef void
(APIENTRYP COGL_PFNGLBINDRENDERBUFFERPROC)
(GLenum target,
GLuint renderbuffer);
typedef void
(APIENTRYP COGL_PFNGLRENDERBUFFERSTORAGEPROC)
(GLenum target,
GLenum internalformat,
GLsizei width,
GLsizei height);
typedef void
(APIENTRYP COGL_PFNGLGENFRAMEBUFFERSPROC)
(GLsizei n,
GLuint *framebuffers);
typedef void
(APIENTRYP COGL_PFNGLBINDFRAMEBUFFERPROC)
(GLenum target,
GLuint framebuffer);
typedef void
(APIENTRYP COGL_PFNGLFRAMEBUFFERTEXTURE2DPROC)
(GLenum target,
GLenum attachment,
GLenum textarget,
GLuint texture,
GLint level);
typedef void
(APIENTRYP COGL_PFNGLFRAMEBUFFERRENDERBUFFERPROC)
(GLenum target,
GLenum attachment,
GLenum renderbuffertarget,
GLuint renderbuffer);
typedef GLenum
(APIENTRYP COGL_PFNGLCHECKFRAMEBUFFERSTATUSPROC)
(GLenum target);
typedef void
(APIENTRYP COGL_PFNGLDELETEFRAMEBUFFERSPROC)
(GLsizei n,
const GLuint *framebuffers);
typedef void
(APIENTRYP COGL_PFNGLDELETERENDERBUFFERSPROC)
(GLsizei n,
const GLuint *renderbuffers);
typedef void
(APIENTRYP COGL_PFNGLGENERATEMIPMAPPROC)
(GLenum target);
G_END_DECLS
#endif

328
cogl/driver/gles/cogl-fbo.c
View File

@ -1,328 +0,0 @@
/*
* Cogl
*
* An object oriented GL/GLES Abstraction/Utility Layer
*
* Copyright (C) 2008,2009 Intel Corporation.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "cogl.h"
#include "cogl-internal.h"
#include "cogl-util.h"
#include "cogl-texture-private.h"
#include "cogl-fbo.h"
#include "cogl-context.h"
#include "cogl-handle.h"
#include "cogl-gles2-wrapper.h"
#ifdef HAVE_COGL_GLES2
static void _cogl_offscreen_free (CoglFbo *fbo);
COGL_HANDLE_DEFINE (Fbo, offscreen);
CoglHandle
cogl_offscreen_new_to_texture (CoglHandle texhandle)
{
CoglFbo *fbo;
int width;
int height;
GLuint tex_gl_handle;
GLenum tex_gl_target;
GLuint fbo_gl_handle;
GLuint gl_stencil_handle;
GLenum status;
_COGL_GET_CONTEXT (ctx, COGL_INVALID_HANDLE);
if (!cogl_features_available (COGL_FEATURE_OFFSCREEN))
return COGL_INVALID_HANDLE;
/* Make texhandle is a valid texture object */
if (!cogl_is_texture (texhandle))
return COGL_INVALID_HANDLE;
/* The texture must not be sliced */
if (cogl_texture_is_sliced (texhandle))
return COGL_INVALID_HANDLE;
/* Pick the single texture slice width, height and GL id */
width = cogl_texture_get_width (texhandle);
height = cogl_texture_get_height (texhandle);
if (!cogl_texture_get_gl_texture (texhandle, &tex_gl_handle, &tex_gl_target))
return COGL_INVALID_HANDLE;
if (tex_gl_target != GL_TEXTURE_2D)
return COGL_INVALID_HANDLE;
/* Create a renderbuffer for stenciling */
GE( glGenRenderbuffers (1, &gl_stencil_handle) );
GE( glBindRenderbuffer (GL_RENDERBUFFER, gl_stencil_handle) );
GE( glRenderbufferStorage (GL_RENDERBUFFER, GL_STENCIL_INDEX8,
cogl_texture_get_width (texhandle),
cogl_texture_get_height (texhandle)) );
GE( glBindRenderbuffer (GL_RENDERBUFFER, 0) );
/* Generate framebuffer */
glGenFramebuffers (1, &fbo_gl_handle);
GE( glBindFramebuffer (GL_FRAMEBUFFER, fbo_gl_handle) );
GE( glFramebufferTexture2D (GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
tex_gl_target, tex_gl_handle, 0) );
GE( glFramebufferRenderbuffer (GL_FRAMEBUFFER,
GL_STENCIL_ATTACHMENT,
GL_RENDERBUFFER, gl_stencil_handle) );
/* Make sure it's complete */
status = glCheckFramebufferStatus (GL_FRAMEBUFFER);
if (status != GL_FRAMEBUFFER_COMPLETE)
{
/* Stencil renderbuffers aren't always supported. Try again
without the stencil buffer */
GE( glFramebufferRenderbuffer (GL_FRAMEBUFFER,
GL_STENCIL_ATTACHMENT,
GL_RENDERBUFFER,
0) );
GE( glDeleteRenderbuffers (1, &gl_stencil_handle) );
gl_stencil_handle = 0;
status = glCheckFramebufferStatus (GL_FRAMEBUFFER);
if (status != GL_FRAMEBUFFER_COMPLETE)
{
/* Still failing, so give up */
GE( glDeleteFramebuffers (1, &fbo_gl_handle) );
GE( glBindFramebuffer (GL_FRAMEBUFFER, 0) );
return COGL_INVALID_HANDLE;
}
}
GE( glBindFramebuffer (GL_FRAMEBUFFER, 0) );
/* Allocate and init a CoglFbo object (store non-wasted size
for subsequent blits and viewport setup) */
fbo = (CoglFbo*) g_malloc (sizeof (CoglFbo));
fbo->width = width;
fbo->height = height;
fbo->gl_handle = fbo_gl_handle;
fbo->gl_stencil_handle = gl_stencil_handle;
return _cogl_offscreen_handle_new (fbo);
}
static void
_cogl_offscreen_free (CoglFbo *fbo)
{
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
/* Frees FBO resources but its handle is not
released! Do that separately before this! */
if (fbo->gl_stencil_handle)
GE( glDeleteRenderbuffers (1, &fbo->gl_stencil_handle) );
GE( glDeleteFramebuffers (1, &fbo->gl_handle) );
g_free (fbo);
}
void
cogl_set_draw_buffer (CoglBufferTarget target, CoglHandle offscreen)
{
CoglFbo *fbo = NULL;
CoglDrawBufferState *draw_buffer;
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
_cogl_journal_flush ();
g_assert (ctx->draw_buffer_stack != NULL);
draw_buffer = ctx->draw_buffer_stack->data;
if (target == COGL_OFFSCREEN_BUFFER)
{
/* Make sure it is a valid fbo handle */
if (!cogl_is_offscreen (offscreen))
return;
fbo = _cogl_offscreen_pointer_from_handle (offscreen);
/* Check current draw buffer target */
if (draw_buffer->target != COGL_OFFSCREEN_BUFFER)
{
/* Push the viewport and matrix setup if redirecting
from a non-screen buffer */
GE( glGetIntegerv (GL_VIEWPORT, ctx->drv.viewport_store) );
_cogl_matrix_stack_push (ctx->projection_stack);
_cogl_matrix_stack_load_identity (ctx->projection_stack);
_cogl_matrix_stack_push (ctx->modelview_stack);
_cogl_matrix_stack_load_identity (ctx->modelview_stack);
}
else
{
/* Override viewport and matrix setup if redirecting
from another offscreen buffer */
_cogl_matrix_stack_load_identity (ctx->projection_stack);
_cogl_matrix_stack_load_identity (ctx->modelview_stack);
}
/* Setup new viewport and matrices */
<<<<<<< HEAD:clutter/cogl/cogl/driver/gles/cogl-fbo.c
GE( glViewport (0, 0, fbo->width, fbo->height) );
_cogl_matrix_stack_translate (ctx->modelview_stack, -1.0f, -1.0f, 0.0f);
_cogl_matrix_stack_scale (ctx->modelview_stack,
2.0f / fbo->width, 2.0f / fbo->height, 1.0f);
=======
cogl_viewport (fbo->width, fbo->height);
_cogl_current_matrix_translate (-1.0f, -1.0f, 0.0f);
_cogl_current_matrix_scale (2.0f / fbo->width, 2.0f / fbo->height, 1.0f);
>>>>>>> c3e471c... [cogl-fbo] Bring the gles code more in line with gl code:clutter/cogl/cogl/driver/gles/cogl-fbo.c
/* Bind offscreen framebuffer object */
GE( glBindFramebuffer (GL_FRAMEBUFFER, fbo->gl_handle) );
GE( glColorMask (GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE) );
}
else if (target & COGL_WINDOW_BUFFER)
{
/* Check current draw buffer target */
if (draw_buffer->target == COGL_OFFSCREEN_BUFFER)
{
/* Pop viewport and matrices if redirecting back
from an offscreen buffer */
GE( glViewport (ctx->drv.viewport_store[0],
ctx->drv.viewport_store[1],
ctx->drv.viewport_store[2],
ctx->drv.viewport_store[3]) );
_cogl_matrix_stack_pop (ctx->projection_stack);
_cogl_matrix_stack_pop (ctx->modelview_stack);
}
/* Bind window framebuffer object */
GE( glBindFramebuffer (GL_FRAMEBUFFER, 0) );
}
/* Store new target */
draw_buffer->target = target;
if (draw_buffer->offscreen != offscreen)
{
if (draw_buffer->offscreen != COGL_INVALID_HANDLE)
cogl_handle_unref (draw_buffer->offscreen);
if (offscreen != COGL_INVALID_HANDLE)
cogl_handle_ref (offscreen);
draw_buffer->offscreen = offscreen;
}
}
void
cogl_push_draw_buffer(void)
{
CoglDrawBufferState *old;
CoglDrawBufferState *draw_buffer;
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
g_assert (ctx->draw_buffer_stack != NULL);
old = ctx->draw_buffer_stack->data;
draw_buffer = g_slice_new0 (CoglDrawBufferState);
*draw_buffer = *old;
ctx->draw_buffer_stack =
g_slist_prepend (ctx->draw_buffer_stack, draw_buffer);
}
void
cogl_pop_draw_buffer(void)
{
CoglDrawBufferState *to_pop;
CoglDrawBufferState *to_restore;
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
g_assert (ctx->draw_buffer_stack != NULL);
if (ctx->draw_buffer_stack->next == NULL)
{
g_warning ("1 more cogl_pop_draw_buffer() than cogl_push_draw_buffer()");
return;
}
to_pop = ctx->draw_buffer_stack->data;
to_restore = ctx->draw_buffer_stack->next->data;
/* the logic in cogl_set_draw_buffer() only works if
* to_pop is still on top of the stack, because
* cogl_set_draw_buffer() needs to know the previous
* state.
*/
cogl_set_draw_buffer (to_restore->target, to_restore->offscreen);
/* cogl_set_draw_buffer() should have set top of stack
* to to_restore
*/
g_assert (to_restore->target == to_pop->target);
g_assert (to_restore->offscreen == to_pop->offscreen);
g_assert (ctx->draw_buffer_stack->data == to_pop);
ctx->draw_buffer_stack =
g_slist_remove_link (ctx->draw_buffer_stack,
ctx->draw_buffer_stack);
g_slice_free (CoglDrawBufferState, to_pop);
}
#else /* HAVE_COGL_GLES2 */
/* No support on regular OpenGL 1.1 */
gboolean
cogl_is_offscreen (CoglHandle handle)
{
return FALSE;
}
CoglHandle
cogl_offscreen_new_to_texture (CoglHandle texhandle)
{
return COGL_INVALID_HANDLE;
}
CoglHandle
cogl_offscreen_ref (CoglHandle handle)
{
return COGL_INVALID_HANDLE;
}
void
cogl_offscreen_unref (CoglHandle handle)
{
}
void
cogl_set_draw_buffer (CoglBufferTarget target, CoglHandle offscreen)
{
}
#endif /* HAVE_COGL_GLES2 */

39
cogl/driver/gles/cogl-fbo.h
View File

@ -1,39 +0,0 @@
/*
* Cogl
*
* An object oriented GL/GLES Abstraction/Utility Layer
*
* Copyright (C) 2007,2008,2009 Intel Corporation.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __COGL_FBO_H
#define __COGL_FBO_H
#include "cogl-handle.h"
typedef struct
{
CoglHandleObject _parent;
int width;
int height;
GLuint gl_handle;
GLuint gl_stencil_handle;
} CoglFbo;
#endif /* __COGL_FBO_H */

121
cogl/driver/gles/cogl-primitives.c
View File

@ -30,6 +30,9 @@
#include "cogl-context.h"
#include "cogl-clip-stack.h"
#include "cogl-material-private.h"
#include "cogl-clip-stack.h"
#include "cogl-draw-buffer-private.h"
#include "cogl-clip-stack.h"
#include <string.h>
#include <gmodule.h>
@ -72,7 +75,7 @@ _cogl_path_add_node (gboolean new_sub_path,
}
void
_cogl_path_stroke_nodes ()
_cogl_path_stroke_nodes (void)
{
guint path_start = 0;
gulong enable_flags = COGL_ENABLE_VERTEX_ARRAY;
@ -80,13 +83,21 @@ _cogl_path_stroke_nodes ()
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
_cogl_journal_flush ();
/* NB: _cogl_draw_buffer_flush_state may disrupt various state (such
* as the material state) when flushing the clip stack, so should
* always be done first when preparing to draw. */
_cogl_draw_buffer_flush_state (_cogl_get_draw_buffer (), 0);
enable_flags |= _cogl_material_get_cogl_enable_flags (ctx->source_material);
cogl_enable (enable_flags);
options.flags = COGL_MATERIAL_FLUSH_DISABLE_MASK;
/* disable all texture layers */
options.disable_layers = (guint32)~0;
_cogl_material_flush_gl_state (ctx->source_material,&options);
_cogl_flush_matrix_stacks();
_cogl_material_flush_gl_state (ctx->source_material, &options);
while (path_start < ctx->path_nodes->len)
{
@ -129,18 +140,38 @@ _cogl_add_path_to_stencil_buffer (floatVec2 nodes_min,
CoglPathNode *path,
gboolean merge)
{
guint path_start = 0;
guint sub_path_num = 0;
float bounds_x;
float bounds_y;
float bounds_w;
float bounds_h;
gulong enable_flags = COGL_ENABLE_VERTEX_ARRAY;
guint path_start = 0;
guint sub_path_num = 0;
float bounds_x;
float bounds_y;
float bounds_w;
float bounds_h;
gulong enable_flags = COGL_ENABLE_VERTEX_ARRAY;
CoglHandle prev_source;
int i;
CoglHandle draw_buffer = _cogl_get_draw_buffer ();
CoglMatrixStack *modelview_stack =
_cogl_draw_buffer_get_modelview_stack (draw_buffer);
CoglMatrixStack *projection_stack =
_cogl_draw_buffer_get_projection_stack (draw_buffer);
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
/* We don't track changes to the stencil buffer in the journal
* so we need to flush any batched geometry first */
_cogl_journal_flush ();
/* NB: _cogl_draw_buffer_flush_state may disrupt various state (such
* as the material state) when flushing the clip stack, so should
* always be done first when preparing to draw. */
_cogl_draw_buffer_flush_state (draw_buffer, 0);
/* Just setup a simple material that doesn't use texturing... */
_cogl_material_flush_gl_state (ctx->stencil_material, NULL);
prev_source = cogl_handle_ref (ctx->source_material);
cogl_set_source (ctx->stencil_material);
_cogl_material_flush_gl_state (ctx->source_material, NULL);
enable_flags |=
_cogl_material_get_cogl_enable_flags (ctx->source_material);
@ -156,7 +187,7 @@ _cogl_add_path_to_stencil_buffer (floatVec2 nodes_min,
}
else
{
GE( glClear (GL_STENCIL_BUFFER_BIT) );
cogl_clear (NULL, COGL_BUFFER_BIT_STENCIL);
GE( glStencilMask (1) );
GE( glStencilFunc (GL_LEQUAL, 0x1, 0x3) );
}
@ -167,7 +198,13 @@ _cogl_add_path_to_stencil_buffer (floatVec2 nodes_min,
GE( glColorMask (FALSE, FALSE, FALSE, FALSE) );
GE( glDepthMask (FALSE) );
_cogl_matrix_stack_flush_to_gl (ctx->modelview_stack, COGL_MATRIX_MODELVIEW);
for (i = 0; i < ctx->n_texcoord_arrays_enabled; i++)
{
GE (glClientActiveTexture (GL_TEXTURE0 + i));
GE (glDisableClientState (GL_TEXTURE_COORD_ARRAY));
}
ctx->n_texcoord_arrays_enabled = 0;
while (path_start < path_size)
{
GE( glVertexPointer (2, GL_FLOAT, sizeof (CoglPathNode),
@ -183,6 +220,14 @@ _cogl_add_path_to_stencil_buffer (floatVec2 nodes_min,
GE( glStencilOp (GL_ZERO, GL_REPLACE, GL_REPLACE) );
cogl_rectangle (bounds_x, bounds_y,
bounds_x + bounds_w, bounds_y + bounds_h);
/* Make sure the rectangle hits the stencil buffer before
* directly changing other GL state. */
_cogl_journal_flush ();
/* NB: The journal flushing may trash the modelview state and
* enable flags */
_cogl_matrix_stack_flush_to_gl (modelview_stack,
COGL_MATRIX_MODELVIEW);
cogl_enable (enable_flags);
GE( glStencilOp (GL_INVERT, GL_INVERT, GL_INVERT) );
}
@ -204,17 +249,24 @@ _cogl_add_path_to_stencil_buffer (floatVec2 nodes_min,
/* Decrement all of the bits twice so that only pixels where the
value is 3 will remain */
_cogl_matrix_stack_push (ctx->projection_stack);
_cogl_matrix_stack_load_identity (ctx->projection_stack);
_cogl_matrix_stack_push (projection_stack);
_cogl_matrix_stack_load_identity (projection_stack);
_cogl_matrix_stack_flush_to_gl (projection_stack,
COGL_MATRIX_PROJECTION);
_cogl_matrix_stack_push (ctx->modelview_stack);
_cogl_matrix_stack_load_identity (ctx->modelview_stack);
_cogl_matrix_stack_push (modelview_stack);
_cogl_matrix_stack_load_identity (modelview_stack);
_cogl_matrix_stack_flush_to_gl (modelview_stack,
COGL_MATRIX_MODELVIEW);
cogl_rectangle (-1.0, -1.0, 1.0, 1.0);
cogl_rectangle (-1.0, -1.0, 1.0, 1.0);
/* Make sure these rectangles hit the stencil buffer before we
* restore the stencil op/func. */
_cogl_journal_flush ();
_cogl_matrix_stack_pop (ctx->modelview_stack);
_cogl_matrix_stack_pop (ctx->projection_stack);
_cogl_matrix_stack_pop (modelview_stack);
_cogl_matrix_stack_pop (projection_stack);
}
GE( glStencilMask (~(GLuint) 0) );
@ -250,6 +302,21 @@ _cogl_path_fill_nodes_scanlines (CoglPathNode *path,
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
/* We are going to use GL to draw directly so make sure any
* previously batched geometry gets to GL before we start...
*/
_cogl_journal_flush ();
/* NB: _cogl_draw_buffer_flush_state may disrupt various state (such
* as the material state) when flushing the clip stack, so should
* always be done first when preparing to draw. */
_cogl_draw_buffer_flush_state (_cogl_get_draw_buffer (), 0);
_cogl_material_flush_gl_state (ctx->source_material, NULL);
cogl_enable (COGL_ENABLE_VERTEX_ARRAY
| (ctx->color_alpha < 255 ? COGL_ENABLE_BLEND : 0));
/* clear scanline intersection lists */
for (i=0; i < bounds_h; i++)
scanlines[i]=NULL;
@ -386,8 +453,6 @@ _cogl_path_fill_nodes_scanlines (CoglPathNode *path,
}
/* render triangles */
cogl_enable (COGL_ENABLE_VERTEX_ARRAY
| (ctx->color_alpha < 255 ? COGL_ENABLE_BLEND : 0));
GE ( glVertexPointer (2, GL_FLOAT, 0, coords ) );
GE ( glDrawArrays (GL_TRIANGLES, 0, spans * 2 * 3));
g_free (coords);
@ -395,7 +460,7 @@ _cogl_path_fill_nodes_scanlines (CoglPathNode *path,
}
void
_cogl_path_fill_nodes ()
_cogl_path_fill_nodes (void)
{
float bounds_x;
float bounds_y;
@ -409,19 +474,27 @@ _cogl_path_fill_nodes ()
if (cogl_features_available (COGL_FEATURE_STENCIL_BUFFER))
{
CoglHandle draw_buffer;
CoglClipStackState *clip_state;
_cogl_journal_flush ();
draw_buffer = _cogl_get_draw_buffer ();
clip_state = _cogl_draw_buffer_get_clip_state (draw_buffer);
_cogl_add_path_to_stencil_buffer (ctx->path_nodes_min,
ctx->path_nodes_max,
ctx->path_nodes->len,
&g_array_index (ctx->path_nodes,
CoglPathNode, 0),
ctx->clip.stencil_used);
clip_state->stencil_used);
cogl_rectangle (bounds_x, bounds_y,
bounds_x + bounds_w, bounds_y + bounds_h);
/* The stencil buffer now contains garbage so the clip area needs to
be rebuilt */
ctx->clip.stack_dirty = TRUE;
_cogl_clip_stack_state_dirty (clip_state);
}
else
{

75
cogl/driver/gles/cogl.c
View File

@ -31,6 +31,56 @@
#include "cogl-internal.h"
#include "cogl-context.h"
typedef struct _CoglGLSymbolTableEntry
{
const char *name;
void *ptr;
} CoglGLSymbolTableEntry;
gboolean
cogl_check_extension (const gchar *name, const gchar *ext)
{
gchar *end;
gint name_len, n;
if (name == NULL || ext == NULL)
return FALSE;
end = (gchar*)(ext + strlen(ext));
name_len = strlen(name);
while (ext < end)
{
n = strcspn(ext, " ");
if ((name_len == n) && (!strncmp(name, ext, n)))
return TRUE;
ext += (n + 1);
}
return FALSE;
}
gboolean
_cogl_resolve_gl_symbols (CoglGLSymbolTableEntry *symbol_table,
const char *suffix)
{
int i;
gboolean status = TRUE;
for (i = 0; symbol_table[i].name; i++)
{
char *full_name = g_strdup_printf ("%s%s", symbol_table[i].name, suffix);
*((CoglFuncPtr *)symbol_table[i].ptr) = cogl_get_proc_address (full_name);
g_free (full_name);
if (!*((CoglFuncPtr *)symbol_table[i].ptr))
{
status = FALSE;
break;
}
}
return status;
}
void
@ -39,9 +89,34 @@ _cogl_features_init (void)
CoglFeatureFlags flags = 0;
int max_clip_planes = 0;
GLint num_stencil_bits = 0;
const char *gl_extensions;
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
gl_extensions = (const char*) glGetString (GL_EXTENSIONS);
if (cogl_check_extension ("GL_OES_framebuffer_object", gl_extensions))
{
g_assert (0);
CoglGLSymbolTableEntry symbol_table[] = {
{"glGenRenderbuffers", &ctx->drv.pf_glGenRenderbuffers},
{"glDeleteRenderbuffers", &ctx->drv.pf_glDeleteRenderbuffers},
{"glBindRenderbuffer", &ctx->drv.pf_glBindRenderbuffer},
{"glRenderbufferStorage", &ctx->drv.pf_glRenderbufferStorage},
{"glGenFramebuffers", &ctx->drv.pf_glGenFramebuffers},
{"glBindFramebuffer", &ctx->drv.pf_glBindFramebuffer},
{"glFramebufferTexture2D", &ctx->drv.pf_glFramebufferTexture2D},
{"glFramebufferRenderbuffer", &ctx->drv.pf_glFramebufferRenderbuffer},
{"glCheckFramebufferStatus", &ctx->drv.pf_glCheckFramebufferStatus},
{"glDeleteFramebuffers", &ctx->drv.pf_glDeleteFramebuffers},
{"glGenerateMipmap", &ctx->drv.pf_glGenerateMipmap},
{NULL, NULL}
};
if (_cogl_resolve_gl_symbols (symbol_table, "OES"))
flags |= COGL_FEATURE_OFFSCREEN;
}
GE( glGetIntegerv (GL_STENCIL_BITS, &num_stencil_bits) );
/* We need at least three stencil bits to combine clips */
if (num_stencil_bits > 2)