400 lines
13 KiB
C
400 lines
13 KiB
C
/*
|
|
* Cogl
|
|
*
|
|
* A Low Level GPU Graphics and Utilities API
|
|
*
|
|
* Copyright (C) 2007,2008,2009 Intel Corporation.
|
|
* Copyright (C) 2019 DisplayLink (UK) Ltd.
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person
|
|
* obtaining a copy of this software and associated documentation
|
|
* files (the "Software"), to deal in the Software without
|
|
* restriction, including without limitation the rights to use, copy,
|
|
* modify, merge, publish, distribute, sublicense, and/or sell copies
|
|
* of the Software, and to permit persons to whom the Software is
|
|
* furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be
|
|
* included in all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
|
|
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
|
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
|
|
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
|
|
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
|
|
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
|
|
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
|
|
* SOFTWARE.
|
|
*
|
|
*
|
|
*/
|
|
|
|
#ifndef __COGL_FRAMEBUFFER_PRIVATE_H
|
|
#define __COGL_FRAMEBUFFER_PRIVATE_H
|
|
|
|
#include "cogl-object-private.h"
|
|
#include "cogl-matrix-stack-private.h"
|
|
#include "cogl-journal-private.h"
|
|
#include "winsys/cogl-winsys-private.h"
|
|
#include "cogl-attribute-private.h"
|
|
#include "cogl-offscreen.h"
|
|
#include "cogl-gl-header.h"
|
|
#include "cogl-clip-stack.h"
|
|
|
|
typedef enum _CoglFramebufferType {
|
|
COGL_FRAMEBUFFER_TYPE_ONSCREEN,
|
|
COGL_FRAMEBUFFER_TYPE_OFFSCREEN
|
|
} CoglFramebufferType;
|
|
|
|
typedef struct
|
|
{
|
|
CoglSwapChain *swap_chain;
|
|
gboolean need_stencil;
|
|
int samples_per_pixel;
|
|
gboolean stereo_enabled;
|
|
} CoglFramebufferConfig;
|
|
|
|
/* Flags to pass to _cogl_offscreen_new_with_texture_full */
|
|
typedef enum
|
|
{
|
|
COGL_OFFSCREEN_DISABLE_DEPTH_AND_STENCIL = 1
|
|
} CoglOffscreenFlags;
|
|
|
|
/* XXX: The order of these indices determines the order they are
|
|
* flushed.
|
|
*
|
|
* Flushing clip state may trash the modelview and projection matrices
|
|
* so we must do it before flushing the matrices.
|
|
*/
|
|
typedef enum _CoglFramebufferStateIndex
|
|
{
|
|
COGL_FRAMEBUFFER_STATE_INDEX_BIND = 0,
|
|
COGL_FRAMEBUFFER_STATE_INDEX_VIEWPORT = 1,
|
|
COGL_FRAMEBUFFER_STATE_INDEX_CLIP = 2,
|
|
COGL_FRAMEBUFFER_STATE_INDEX_DITHER = 3,
|
|
COGL_FRAMEBUFFER_STATE_INDEX_MODELVIEW = 4,
|
|
COGL_FRAMEBUFFER_STATE_INDEX_PROJECTION = 5,
|
|
COGL_FRAMEBUFFER_STATE_INDEX_FRONT_FACE_WINDING = 6,
|
|
COGL_FRAMEBUFFER_STATE_INDEX_DEPTH_WRITE = 7,
|
|
COGL_FRAMEBUFFER_STATE_INDEX_STEREO_MODE = 8,
|
|
COGL_FRAMEBUFFER_STATE_INDEX_MAX = 9
|
|
} CoglFramebufferStateIndex;
|
|
|
|
typedef enum _CoglFramebufferState
|
|
{
|
|
COGL_FRAMEBUFFER_STATE_BIND = 1<<0,
|
|
COGL_FRAMEBUFFER_STATE_VIEWPORT = 1<<1,
|
|
COGL_FRAMEBUFFER_STATE_CLIP = 1<<2,
|
|
COGL_FRAMEBUFFER_STATE_DITHER = 1<<3,
|
|
COGL_FRAMEBUFFER_STATE_MODELVIEW = 1<<4,
|
|
COGL_FRAMEBUFFER_STATE_PROJECTION = 1<<5,
|
|
COGL_FRAMEBUFFER_STATE_FRONT_FACE_WINDING = 1<<6,
|
|
COGL_FRAMEBUFFER_STATE_DEPTH_WRITE = 1<<7,
|
|
COGL_FRAMEBUFFER_STATE_STEREO_MODE = 1<<8
|
|
} CoglFramebufferState;
|
|
|
|
#define COGL_FRAMEBUFFER_STATE_ALL ((1<<COGL_FRAMEBUFFER_STATE_INDEX_MAX) - 1)
|
|
|
|
/* Private flags that can internally be added to CoglReadPixelsFlags */
|
|
typedef enum
|
|
{
|
|
/* If this is set then the data will not be flipped to compensate
|
|
for GL's upside-down coordinate system but instead will be left
|
|
in whatever order GL gives us (which will depend on whether the
|
|
framebuffer is offscreen or not) */
|
|
COGL_READ_PIXELS_NO_FLIP = 1L << 30
|
|
} CoglPrivateReadPixelsFlags;
|
|
|
|
typedef struct
|
|
{
|
|
int red;
|
|
int blue;
|
|
int green;
|
|
int alpha;
|
|
int depth;
|
|
int stencil;
|
|
} CoglFramebufferBits;
|
|
|
|
struct _CoglFramebuffer
|
|
{
|
|
CoglObject _parent;
|
|
CoglContext *context;
|
|
CoglFramebufferType type;
|
|
|
|
/* The user configuration before allocation... */
|
|
CoglFramebufferConfig config;
|
|
|
|
int width;
|
|
int height;
|
|
/* Format of the pixels in the framebuffer (including the expected
|
|
premult state) */
|
|
CoglPixelFormat internal_format;
|
|
gboolean allocated;
|
|
|
|
CoglMatrixStack *modelview_stack;
|
|
CoglMatrixStack *projection_stack;
|
|
float viewport_x;
|
|
float viewport_y;
|
|
float viewport_width;
|
|
float viewport_height;
|
|
int viewport_age;
|
|
int viewport_age_for_scissor_workaround;
|
|
|
|
CoglClipStack *clip_stack;
|
|
|
|
gboolean dither_enabled;
|
|
gboolean depth_writing_enabled;
|
|
CoglStereoMode stereo_mode;
|
|
|
|
/* We journal the textured rectangles we want to submit to OpenGL so
|
|
* we have an opportunity to batch them together into less draw
|
|
* calls. */
|
|
CoglJournal *journal;
|
|
|
|
/* The scene of a given framebuffer may depend on images in other
|
|
* framebuffers... */
|
|
GList *deps;
|
|
|
|
/* As part of an optimization for reading-back single pixels from a
|
|
* framebuffer in some simple cases where the geometry is still
|
|
* available in the journal we need to track the bounds of the last
|
|
* region cleared, its color and we need to track when something
|
|
* does in fact draw to that region so it is no longer clear.
|
|
*/
|
|
float clear_color_red;
|
|
float clear_color_green;
|
|
float clear_color_blue;
|
|
float clear_color_alpha;
|
|
int clear_clip_x0;
|
|
int clear_clip_y0;
|
|
int clear_clip_x1;
|
|
int clear_clip_y1;
|
|
gboolean clear_clip_dirty;
|
|
|
|
/* driver specific */
|
|
gboolean dirty_bitmasks;
|
|
CoglFramebufferBits bits;
|
|
|
|
int samples_per_pixel;
|
|
|
|
/* Whether the depth buffer was enabled for this framebuffer,
|
|
* usually means it needs to be cleared before being reused next.
|
|
*/
|
|
gboolean depth_buffer_clear_needed;
|
|
};
|
|
|
|
typedef enum
|
|
{
|
|
COGL_OFFSCREEN_ALLOCATE_FLAG_DEPTH_STENCIL = 1L<<0,
|
|
COGL_OFFSCREEN_ALLOCATE_FLAG_DEPTH = 1L<<1,
|
|
COGL_OFFSCREEN_ALLOCATE_FLAG_STENCIL = 1L<<2
|
|
} CoglOffscreenAllocateFlags;
|
|
|
|
typedef struct _CoglGLFramebuffer
|
|
{
|
|
GLuint fbo_handle;
|
|
GList *renderbuffers;
|
|
int samples_per_pixel;
|
|
} CoglGLFramebuffer;
|
|
|
|
struct _CoglOffscreen
|
|
{
|
|
CoglFramebuffer _parent;
|
|
|
|
CoglGLFramebuffer gl_framebuffer;
|
|
|
|
CoglTexture *texture;
|
|
int texture_level;
|
|
|
|
CoglTexture *depth_texture;
|
|
|
|
CoglOffscreenAllocateFlags allocation_flags;
|
|
|
|
/* FIXME: _cogl_offscreen_new_with_texture_full should be made to use
|
|
* fb->config to configure if we want a depth or stencil buffer so
|
|
* we can get rid of these flags */
|
|
CoglOffscreenFlags create_flags;
|
|
};
|
|
|
|
void
|
|
_cogl_framebuffer_init (CoglFramebuffer *framebuffer,
|
|
CoglContext *ctx,
|
|
CoglFramebufferType type,
|
|
int width,
|
|
int height);
|
|
|
|
/* XXX: For a public api we might instead want a way to explicitly
|
|
* set the _premult status of a framebuffer or what components we
|
|
* care about instead of exposing the CoglPixelFormat
|
|
* internal_format.
|
|
*
|
|
* The current use case for this api is where we create an offscreen
|
|
* framebuffer for a shared atlas texture that has a format of
|
|
* RGBA_8888 disregarding the premultiplied alpha status for
|
|
* individual atlased textures or whether the alpha component is being
|
|
* discarded. We want to overried the internal_format that will be
|
|
* derived from the texture.
|
|
*/
|
|
void
|
|
_cogl_framebuffer_set_internal_format (CoglFramebuffer *framebuffer,
|
|
CoglPixelFormat internal_format);
|
|
|
|
void _cogl_framebuffer_free (CoglFramebuffer *framebuffer);
|
|
|
|
const CoglWinsysVtable *
|
|
_cogl_framebuffer_get_winsys (CoglFramebuffer *framebuffer);
|
|
|
|
void
|
|
_cogl_framebuffer_clear_without_flush4f (CoglFramebuffer *framebuffer,
|
|
unsigned long buffers,
|
|
float red,
|
|
float green,
|
|
float blue,
|
|
float alpha);
|
|
|
|
void
|
|
_cogl_framebuffer_mark_clear_clip_dirty (CoglFramebuffer *framebuffer);
|
|
|
|
/*
|
|
* _cogl_framebuffer_get_clip_stack:
|
|
* @framebuffer: A #CoglFramebuffer
|
|
*
|
|
* Gets a pointer to the current clip stack. A reference is not taken on the
|
|
* stack so if you want to keep it you should call
|
|
* _cogl_clip_stack_ref().
|
|
*
|
|
* Return value: a pointer to the @framebuffer clip stack.
|
|
*/
|
|
CoglClipStack *
|
|
_cogl_framebuffer_get_clip_stack (CoglFramebuffer *framebuffer);
|
|
|
|
COGL_EXPORT CoglMatrixStack *
|
|
_cogl_framebuffer_get_modelview_stack (CoglFramebuffer *framebuffer);
|
|
|
|
COGL_EXPORT CoglMatrixStack *
|
|
_cogl_framebuffer_get_projection_stack (CoglFramebuffer *framebuffer);
|
|
|
|
void
|
|
_cogl_framebuffer_add_dependency (CoglFramebuffer *framebuffer,
|
|
CoglFramebuffer *dependency);
|
|
|
|
void
|
|
_cogl_framebuffer_flush_journal (CoglFramebuffer *framebuffer);
|
|
|
|
void
|
|
_cogl_framebuffer_flush_dependency_journals (CoglFramebuffer *framebuffer);
|
|
|
|
void
|
|
_cogl_framebuffer_flush_state (CoglFramebuffer *draw_buffer,
|
|
CoglFramebuffer *read_buffer,
|
|
CoglFramebufferState state);
|
|
|
|
CoglFramebuffer *
|
|
_cogl_get_read_framebuffer (void);
|
|
|
|
GSList *
|
|
_cogl_create_framebuffer_stack (void);
|
|
|
|
void
|
|
_cogl_free_framebuffer_stack (GSList *stack);
|
|
|
|
/*
|
|
* _cogl_offscreen_new_with_texture_full:
|
|
* @texture: A #CoglTexture pointer
|
|
* @create_flags: Flags specifying how to create the FBO
|
|
* @level: The mipmap level within the texture to target
|
|
*
|
|
* Creates a new offscreen buffer which will target the given
|
|
* texture. By default the buffer will have a depth and stencil
|
|
* buffer. This can be disabled by passing
|
|
* %COGL_OFFSCREEN_DISABLE_DEPTH_AND_STENCIL in @create_flags.
|
|
*
|
|
* Return value: the new CoglOffscreen object.
|
|
*/
|
|
CoglOffscreen *
|
|
_cogl_offscreen_new_with_texture_full (CoglTexture *texture,
|
|
CoglOffscreenFlags create_flags,
|
|
int level);
|
|
|
|
void
|
|
_cogl_framebuffer_save_clip_stack (CoglFramebuffer *framebuffer);
|
|
|
|
void
|
|
_cogl_framebuffer_restore_clip_stack (CoglFramebuffer *framebuffer);
|
|
|
|
void
|
|
_cogl_framebuffer_unref (CoglFramebuffer *framebuffer);
|
|
|
|
/* This can be called directly by the CoglJournal to draw attributes
|
|
* skipping the implicit journal flush, the framebuffer flush and
|
|
* pipeline validation. */
|
|
void
|
|
_cogl_framebuffer_draw_attributes (CoglFramebuffer *framebuffer,
|
|
CoglPipeline *pipeline,
|
|
CoglVerticesMode mode,
|
|
int first_vertex,
|
|
int n_vertices,
|
|
CoglAttribute **attributes,
|
|
int n_attributes,
|
|
CoglDrawFlags flags);
|
|
|
|
void
|
|
_cogl_framebuffer_draw_indexed_attributes (CoglFramebuffer *framebuffer,
|
|
CoglPipeline *pipeline,
|
|
CoglVerticesMode mode,
|
|
int first_vertex,
|
|
int n_vertices,
|
|
CoglIndices *indices,
|
|
CoglAttribute **attributes,
|
|
int n_attributes,
|
|
CoglDrawFlags flags);
|
|
|
|
void
|
|
cogl_framebuffer_set_viewport4fv (CoglFramebuffer *framebuffer,
|
|
float *viewport);
|
|
|
|
unsigned long
|
|
_cogl_framebuffer_compare (CoglFramebuffer *a,
|
|
CoglFramebuffer *b,
|
|
unsigned long state);
|
|
|
|
static inline CoglMatrixEntry *
|
|
_cogl_framebuffer_get_modelview_entry (CoglFramebuffer *framebuffer)
|
|
{
|
|
CoglMatrixStack *modelview_stack =
|
|
_cogl_framebuffer_get_modelview_stack (framebuffer);
|
|
return modelview_stack->last_entry;
|
|
}
|
|
|
|
static inline CoglMatrixEntry *
|
|
_cogl_framebuffer_get_projection_entry (CoglFramebuffer *framebuffer)
|
|
{
|
|
CoglMatrixStack *projection_stack =
|
|
_cogl_framebuffer_get_projection_stack (framebuffer);
|
|
return projection_stack->last_entry;
|
|
}
|
|
|
|
gboolean
|
|
_cogl_framebuffer_read_pixels_into_bitmap (CoglFramebuffer *framebuffer,
|
|
int x,
|
|
int y,
|
|
CoglReadPixelsFlags source,
|
|
CoglBitmap *bitmap,
|
|
GError **error);
|
|
|
|
/*
|
|
* _cogl_framebuffer_get_stencil_bits:
|
|
* @framebuffer: a pointer to a #CoglFramebuffer
|
|
*
|
|
* Retrieves the number of stencil bits of @framebuffer
|
|
*
|
|
* Return value: the number of bits
|
|
*
|
|
* Since: 2.0
|
|
* Stability: unstable
|
|
*/
|
|
COGL_EXPORT int
|
|
_cogl_framebuffer_get_stencil_bits (CoglFramebuffer *framebuffer);
|
|
|
|
#endif /* __COGL_FRAMEBUFFER_PRIVATE_H */
|