mirror of
https://github.com/brl/mutter.git
synced 2024-11-12 17:27:03 -05:00
acc44161c1
As part of an effort to improve the architecture of CoglMaterial internally this overhauls how we flush layer state to OpenGL by adding a formal backend abstraction for fragment processing and further formalizing the CoglTextureUnit abstraction. There are three backends: "glsl", "arbfp" and "fixed". The fixed backend uses the OpenGL fixed function APIs to setup the fragment processing, the arbfp backend uses code generation to handle fragment processing using an ARBfp program, and the GLSL backend is currently only there as a formality to handle user programs associated with a material. (i.e. the glsl backend doesn't yet support code generation) The GLSL backend has highest precedence, then arbfp and finally the fixed. If a backend can't support some particular CoglMaterial feature then it will fallback to the next backend. This adds three new COGL_DEBUG options: * "disable-texturing" as expected should disable all texturing * "disable-arbfp" always make the arbfp backend fallback * "disable-glsl" always make the glsl backend fallback * "show-source" show code generated by the arbfp/glsl backends
272 lines
6.5 KiB
C
272 lines
6.5 KiB
C
/*
|
|
* Cogl
|
|
*
|
|
* An object oriented GL/GLES Abstraction/Utility Layer
|
|
*
|
|
* Copyright (C) 2010 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/>.
|
|
*
|
|
*
|
|
*
|
|
* Authors:
|
|
* Damien Lespiau <damien.lespiau@intel.com>
|
|
*/
|
|
|
|
/* For an overview of the functionality implemented here, please see
|
|
* cogl-buffer.h, which contains the gtk-doc section overview for the
|
|
* Pixel Buffers API.
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif
|
|
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <glib.h>
|
|
|
|
#include "cogl.h"
|
|
#include "cogl-internal.h"
|
|
#include "cogl-util.h"
|
|
#include "cogl-context.h"
|
|
#include "cogl-handle.h"
|
|
#include "cogl-pixel-buffer-private.h"
|
|
|
|
/*
|
|
* GL/GLES compatibility defines for the buffer API:
|
|
*/
|
|
|
|
#if defined (HAVE_COGL_GL)
|
|
|
|
#define glGenBuffers ctx->drv.pf_glGenBuffers
|
|
#define glBindBuffer ctx->drv.pf_glBindBuffer
|
|
#define glBufferData ctx->drv.pf_glBufferData
|
|
#define glBufferSubData ctx->drv.pf_glBufferSubData
|
|
#define glGetBufferSubData ctx->drv.pf_glGetBufferSubData
|
|
#define glDeleteBuffers ctx->drv.pf_glDeleteBuffers
|
|
#define glMapBuffer ctx->drv.pf_glMapBuffer
|
|
#define glUnmapBuffer ctx->drv.pf_glUnmapBuffer
|
|
#ifndef GL_ARRAY_BUFFER
|
|
#define GL_ARRAY_BUFFER GL_ARRAY_BUFFER_ARB
|
|
#endif
|
|
|
|
#elif defined (HAVE_COGL_GLES2)
|
|
|
|
#include "../gles/cogl-gles2-wrapper.h"
|
|
|
|
#endif
|
|
|
|
void cogl_buffer_unmap_EXP (CoglBuffer *buffer);
|
|
|
|
gboolean
|
|
cogl_is_buffer_EXP (const void *object)
|
|
{
|
|
CoglObject *obj = (CoglObject *)object;
|
|
|
|
if (obj == NULL)
|
|
return FALSE;
|
|
|
|
return obj->klass->type == _cogl_handle_pixel_buffer_get_type ();
|
|
}
|
|
|
|
void
|
|
_cogl_buffer_initialize (CoglBuffer *buffer,
|
|
unsigned int size,
|
|
CoglBufferUsageHint usage_hint,
|
|
CoglBufferUpdateHint update_hint)
|
|
{
|
|
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
|
|
|
|
buffer->flags = COGL_BUFFER_FLAG_NONE;
|
|
buffer->size = size;
|
|
buffer->usage_hint = usage_hint;
|
|
buffer->update_hint = update_hint;
|
|
buffer->data = NULL;
|
|
}
|
|
|
|
void
|
|
_cogl_buffer_fini (CoglBuffer *buffer)
|
|
{
|
|
if (COGL_BUFFER_FLAG_IS_SET (buffer, MAPPED))
|
|
cogl_buffer_unmap (buffer);
|
|
}
|
|
|
|
/* OpenGL ES 1.1 and 2 have a GL_OES_mapbuffer extension that is able to map
|
|
* VBOs for write only, we don't support that in CoglBuffer */
|
|
#if defined (COGL_HAS_GLES)
|
|
GLenum
|
|
_cogl_buffer_access_to_gl_enum (CoglBufferAccess access)
|
|
{
|
|
return 0;
|
|
}
|
|
#else
|
|
GLenum
|
|
_cogl_buffer_access_to_gl_enum (CoglBufferAccess access)
|
|
{
|
|
if ((access & COGL_BUFFER_ACCESS_READ_WRITE) == COGL_BUFFER_ACCESS_READ_WRITE)
|
|
return GL_READ_WRITE;
|
|
else if (access & COGL_BUFFER_ACCESS_WRITE)
|
|
return GL_WRITE_ONLY;
|
|
else
|
|
return GL_READ_ONLY;
|
|
}
|
|
#endif
|
|
|
|
/* OpenGL ES 1.1 and 2 only know about STATIC_DRAW and DYNAMIC_DRAW */
|
|
#if defined (COGL_HAS_GLES)
|
|
GLenum
|
|
_cogl_buffer_hints_to_gl_enum (CoglBufferUsageHint usage_hint,
|
|
CoglBufferUpdateHint update_hint)
|
|
{
|
|
/* usage hint is always TEXTURE for now */
|
|
if (update_hint == COGL_BUFFER_UPDATE_HINT_STATIC)
|
|
return GL_STATIC_DRAW;
|
|
return GL_DYNAMIC_DRAW;
|
|
}
|
|
#else
|
|
GLenum
|
|
_cogl_buffer_hints_to_gl_enum (CoglBufferUsageHint usage_hint,
|
|
CoglBufferUpdateHint update_hint)
|
|
{
|
|
/* usage hint is always TEXTURE for now */
|
|
if (update_hint == COGL_BUFFER_UPDATE_HINT_STATIC)
|
|
return GL_STATIC_DRAW;
|
|
if (update_hint == COGL_BUFFER_UPDATE_HINT_DYNAMIC)
|
|
return GL_DYNAMIC_DRAW;
|
|
if (update_hint == COGL_BUFFER_UPDATE_HINT_STREAM)
|
|
return GL_STREAM_DRAW;
|
|
|
|
return GL_STATIC_DRAW;
|
|
}
|
|
#endif
|
|
|
|
void
|
|
_cogl_buffer_bind (CoglBuffer *buffer,
|
|
GLenum target)
|
|
{
|
|
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
|
|
|
|
/* Don't bind again an already bound pbo */
|
|
if (ctx->current_pbo == buffer)
|
|
return;
|
|
|
|
if (buffer && COGL_BUFFER_FLAG_IS_SET (buffer, BUFFER_OBJECT))
|
|
{
|
|
GE( glBindBuffer (target, buffer->gl_handle) );
|
|
}
|
|
else if (buffer == NULL &&
|
|
ctx->current_pbo &&
|
|
COGL_BUFFER_FLAG_IS_SET (ctx->current_pbo, BUFFER_OBJECT))
|
|
{
|
|
GE( glBindBuffer (target, 0) );
|
|
}
|
|
|
|
ctx->current_pbo = buffer;
|
|
}
|
|
|
|
unsigned int
|
|
cogl_buffer_get_size_EXP (CoglBuffer *buffer)
|
|
{
|
|
if (!cogl_is_buffer (buffer))
|
|
return 0;
|
|
|
|
return COGL_BUFFER (buffer)->size;
|
|
}
|
|
|
|
void
|
|
cogl_buffer_set_usage_hint_EXP (CoglBuffer *buffer,
|
|
CoglBufferUsageHint hint)
|
|
{
|
|
if (!cogl_is_buffer (buffer))
|
|
return;
|
|
|
|
if (G_UNLIKELY (hint > COGL_BUFFER_USAGE_HINT_TEXTURE))
|
|
hint = COGL_BUFFER_USAGE_HINT_TEXTURE;
|
|
|
|
buffer->usage_hint = hint;
|
|
}
|
|
|
|
CoglBufferUsageHint
|
|
cogl_buffer_get_usage_hint_EXP (CoglBuffer *buffer)
|
|
{
|
|
if (!cogl_is_buffer (buffer))
|
|
return FALSE;
|
|
|
|
return buffer->usage_hint;
|
|
}
|
|
|
|
void
|
|
cogl_buffer_set_update_hint_EXP (CoglBuffer *buffer,
|
|
CoglBufferUpdateHint hint)
|
|
{
|
|
if (!cogl_is_buffer (buffer))
|
|
return;
|
|
|
|
if (G_UNLIKELY (hint > COGL_BUFFER_UPDATE_HINT_STREAM))
|
|
hint = COGL_BUFFER_UPDATE_HINT_STATIC;
|
|
|
|
buffer->update_hint = hint;
|
|
}
|
|
|
|
CoglBufferUpdateHint
|
|
cogl_buffer_get_update_hint_EXP (CoglBuffer *buffer)
|
|
{
|
|
if (!cogl_is_buffer (buffer))
|
|
return FALSE;
|
|
|
|
return buffer->update_hint;
|
|
}
|
|
|
|
guint8 *
|
|
cogl_buffer_map_EXP (CoglBuffer *buffer,
|
|
CoglBufferAccess access)
|
|
{
|
|
if (!cogl_is_buffer (buffer))
|
|
return NULL;
|
|
|
|
if (COGL_BUFFER_FLAG_IS_SET (buffer, MAPPED))
|
|
return buffer->data;
|
|
|
|
buffer->data = buffer->vtable->map (buffer, access);
|
|
return buffer->data;
|
|
}
|
|
|
|
void
|
|
cogl_buffer_unmap_EXP (CoglBuffer *buffer)
|
|
{
|
|
if (!cogl_is_buffer (buffer))
|
|
return;
|
|
|
|
if (!COGL_BUFFER_FLAG_IS_SET (buffer, MAPPED))
|
|
return;
|
|
|
|
buffer->vtable->unmap (buffer);
|
|
}
|
|
|
|
gboolean
|
|
cogl_buffer_set_data_EXP (CoglBuffer *buffer,
|
|
gsize offset,
|
|
const guint8 *data,
|
|
gsize size)
|
|
{
|
|
if (!cogl_is_buffer (buffer))
|
|
return FALSE;
|
|
|
|
if (G_UNLIKELY((offset + size) > buffer->size))
|
|
return FALSE;
|
|
|
|
return buffer->vtable->set_data (buffer, offset, data, size);
|
|
}
|