mutter/cogl/cogl-framebuffer-private.h
Emmanuele Bassi 676c8a5fd4 Implement accessors for the color bits in a framebuffer
Instead of using cogl_get_bitmasks() to query the GL machinery for the
size of the color bits, we should store the values inside the
CoglFramebuffer object and query them the first time we set the framebuffer
as the current one.

Currently, cogl_get_bitmasks() is re-implemented in terms of
cogl_framebuffer_get_*_bits(). As soon as we are able to expose the
CoglOnscreen framebuffer object in the public API we'll be able to
deprecate cogl_get_bitmasks() altogether.

http://bugzilla.openedhand.com/show_bug.cgi?id=2094
2010-05-05 12:25:16 +01:00

144 lines
3.6 KiB
C

/*
* 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, see <http://www.gnu.org/licenses/>.
*
*
*/
#ifndef __COGL_FRAMEBUFFER_PRIVATE_H
#define __COGL_FRAMEBUFFER_PRIVATE_H
#include "cogl-handle.h"
#include "cogl-matrix-stack.h"
#include "cogl-clip-state.h"
typedef enum _CoglFramebufferType {
COGL_FRAMEBUFFER_TYPE_ONSCREEN,
COGL_FRAMEBUFFER_TYPE_OFFSCREEN
} CoglFramebufferType;
typedef struct
{
CoglHandleObject _parent;
CoglFramebufferType type;
int width;
int height;
CoglMatrixStack *modelview_stack;
CoglMatrixStack *projection_stack;
int viewport_x;
int viewport_y;
int viewport_width;
int viewport_height;
CoglClipState clip_state;
gboolean dirty_bitmasks;
int red_bits;
int blue_bits;
int green_bits;
int alpha_bits;
} CoglFramebuffer;
#define COGL_FRAMEBUFFER(X) ((CoglFramebuffer *)(X))
typedef struct _CoglOffscreen
{
CoglFramebuffer _parent;
GLuint fbo_handle;
GSList *renderbuffers;
CoglHandle texture;
} CoglOffscreen;
#define COGL_OFFSCREEN(X) ((CoglOffscreen *)(X))
typedef struct _CoglOnscreen
{
CoglFramebuffer _parent;
} CoglOnscreen;
#define COGL_ONSCREEN(X) ((CoglOnscreen *)(X))
void
_cogl_framebuffer_state_init (void);
int
_cogl_framebuffer_get_width (CoglHandle handle);
int
_cogl_framebuffer_get_height (CoglHandle handle);
CoglClipState *
_cogl_framebuffer_get_clip_state (CoglHandle handle);
void
_cogl_framebuffer_set_viewport (CoglHandle handle,
int x,
int y,
int width,
int height);
int
_cogl_framebuffer_get_viewport_x (CoglHandle handle);
int
_cogl_framebuffer_get_viewport_y (CoglHandle handle);
int
_cogl_framebuffer_get_viewport_width (CoglHandle handle);
int
_cogl_framebuffer_get_viewport_height (CoglHandle handle);
void
_cogl_framebuffer_get_viewport4fv (CoglHandle handle, int *viewport);
CoglMatrixStack *
_cogl_framebuffer_get_modelview_stack (CoglHandle handle);
CoglMatrixStack *
_cogl_framebuffer_get_projection_stack (CoglHandle handle);
typedef enum _CoglFramebufferFlushFlags
{
/* 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 framebuffer->modelview_stack, and the modelview_stack will
* also be marked as dirty. */
COGL_FRAMEBUFFER_FLUSH_SKIP_MODELVIEW = 1L<<0,
} CoglFramebufferFlushFlags;
void
_cogl_framebuffer_flush_state (CoglHandle handle,
CoglFramebufferFlushFlags flags);
CoglHandle
_cogl_onscreen_new (void);
CoglHandle
_cogl_get_framebuffer (void);
GSList *
_cogl_create_framebuffer_stack (void);
void
_cogl_free_framebuffer_stack (GSList *stack);
#endif /* __COGL_FRAMEBUFFER_PRIVATE_H */