5d62185f1c
As part of an effort towards being able to write non-opengl based backends for Cogl this moves most of the opengl specific code under drivers/gl. drivers/gl and drivers/gles have been moved to drivers/gl/gl and drivers/gl/es respectively. Reviewed-by: Neil Roberts <neil@linux.intel.com> (cherry picked from commit 7dc482facb0a265c7f48660079e7e12dd7a2813e)
356 lines
12 KiB
C
356 lines
12 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/>.
|
|
*
|
|
*
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif
|
|
|
|
#include <string.h>
|
|
|
|
#include "cogl-internal.h"
|
|
#include "cogl-context-private.h"
|
|
#include "cogl-feature-private.h"
|
|
#include "cogl-renderer-private.h"
|
|
#include "cogl-private.h"
|
|
#include "cogl-framebuffer-gl-private.h"
|
|
|
|
#ifndef GL_UNSIGNED_INT_24_8
|
|
#define GL_UNSIGNED_INT_24_8 0x84FA
|
|
#endif
|
|
#ifndef GL_DEPTH_STENCIL
|
|
#define GL_DEPTH_STENCIL 0x84F9
|
|
#endif
|
|
|
|
static CoglBool
|
|
_cogl_driver_pixel_format_from_gl_internal (CoglContext *context,
|
|
GLenum gl_int_format,
|
|
CoglPixelFormat *out_format)
|
|
{
|
|
return TRUE;
|
|
}
|
|
|
|
static CoglPixelFormat
|
|
_cogl_driver_pixel_format_to_gl (CoglContext *context,
|
|
CoglPixelFormat format,
|
|
GLenum *out_glintformat,
|
|
GLenum *out_glformat,
|
|
GLenum *out_gltype)
|
|
{
|
|
CoglPixelFormat required_format;
|
|
GLenum glintformat;
|
|
GLenum glformat = 0;
|
|
GLenum gltype;
|
|
|
|
required_format = format;
|
|
|
|
/* Find GL equivalents */
|
|
switch (format)
|
|
{
|
|
case COGL_PIXEL_FORMAT_A_8:
|
|
glintformat = GL_ALPHA;
|
|
glformat = GL_ALPHA;
|
|
gltype = GL_UNSIGNED_BYTE;
|
|
break;
|
|
case COGL_PIXEL_FORMAT_G_8:
|
|
glintformat = GL_LUMINANCE;
|
|
glformat = GL_LUMINANCE;
|
|
gltype = GL_UNSIGNED_BYTE;
|
|
break;
|
|
|
|
case COGL_PIXEL_FORMAT_BGRA_8888:
|
|
case COGL_PIXEL_FORMAT_BGRA_8888_PRE:
|
|
/* There is an extension to support this format */
|
|
if ((context->private_feature_flags &
|
|
COGL_PRIVATE_FEATURE_TEXTURE_FORMAT_BGRA8888))
|
|
{
|
|
/* For some reason the extension says you have to specify
|
|
BGRA for the internal format too */
|
|
glintformat = GL_BGRA_EXT;
|
|
glformat = GL_BGRA_EXT;
|
|
gltype = GL_UNSIGNED_BYTE;
|
|
required_format = format;
|
|
break;
|
|
}
|
|
/* flow through */
|
|
|
|
/* Just one 24-bit ordering supported */
|
|
case COGL_PIXEL_FORMAT_RGB_888:
|
|
case COGL_PIXEL_FORMAT_BGR_888:
|
|
glintformat = GL_RGB;
|
|
glformat = GL_RGB;
|
|
gltype = GL_UNSIGNED_BYTE;
|
|
required_format = COGL_PIXEL_FORMAT_RGB_888;
|
|
break;
|
|
|
|
/* Just one 32-bit ordering supported */
|
|
case COGL_PIXEL_FORMAT_RGBA_8888:
|
|
case COGL_PIXEL_FORMAT_RGBA_8888_PRE:
|
|
case COGL_PIXEL_FORMAT_ARGB_8888:
|
|
case COGL_PIXEL_FORMAT_ARGB_8888_PRE:
|
|
case COGL_PIXEL_FORMAT_ABGR_8888:
|
|
case COGL_PIXEL_FORMAT_ABGR_8888_PRE:
|
|
case COGL_PIXEL_FORMAT_RGBA_1010102:
|
|
case COGL_PIXEL_FORMAT_RGBA_1010102_PRE:
|
|
case COGL_PIXEL_FORMAT_BGRA_1010102:
|
|
case COGL_PIXEL_FORMAT_BGRA_1010102_PRE:
|
|
case COGL_PIXEL_FORMAT_ABGR_2101010:
|
|
case COGL_PIXEL_FORMAT_ABGR_2101010_PRE:
|
|
case COGL_PIXEL_FORMAT_ARGB_2101010:
|
|
case COGL_PIXEL_FORMAT_ARGB_2101010_PRE:
|
|
glintformat = GL_RGBA;
|
|
glformat = GL_RGBA;
|
|
gltype = GL_UNSIGNED_BYTE;
|
|
required_format = COGL_PIXEL_FORMAT_RGBA_8888;
|
|
required_format |= (format & COGL_PREMULT_BIT);
|
|
break;
|
|
|
|
/* The following three types of channel ordering
|
|
* are always defined using system word byte
|
|
* ordering (even according to GLES spec) */
|
|
case COGL_PIXEL_FORMAT_RGB_565:
|
|
glintformat = GL_RGB;
|
|
glformat = GL_RGB;
|
|
gltype = GL_UNSIGNED_SHORT_5_6_5;
|
|
break;
|
|
case COGL_PIXEL_FORMAT_RGBA_4444:
|
|
case COGL_PIXEL_FORMAT_RGBA_4444_PRE:
|
|
glintformat = GL_RGBA;
|
|
glformat = GL_RGBA;
|
|
gltype = GL_UNSIGNED_SHORT_4_4_4_4;
|
|
break;
|
|
case COGL_PIXEL_FORMAT_RGBA_5551:
|
|
case COGL_PIXEL_FORMAT_RGBA_5551_PRE:
|
|
glintformat = GL_RGBA;
|
|
glformat = GL_RGBA;
|
|
gltype = GL_UNSIGNED_SHORT_5_5_5_1;
|
|
break;
|
|
|
|
case COGL_PIXEL_FORMAT_DEPTH_16:
|
|
glintformat = GL_DEPTH_COMPONENT;
|
|
glformat = GL_DEPTH_COMPONENT;
|
|
gltype = GL_UNSIGNED_SHORT;
|
|
break;
|
|
case COGL_PIXEL_FORMAT_DEPTH_32:
|
|
glintformat = GL_DEPTH_COMPONENT;
|
|
glformat = GL_DEPTH_COMPONENT;
|
|
gltype = GL_UNSIGNED_INT;
|
|
break;
|
|
|
|
case COGL_PIXEL_FORMAT_DEPTH_24_STENCIL_8:
|
|
glintformat = GL_DEPTH_STENCIL;
|
|
glformat = GL_DEPTH_STENCIL;
|
|
gltype = GL_UNSIGNED_INT_24_8;
|
|
break;
|
|
|
|
case COGL_PIXEL_FORMAT_ANY:
|
|
case COGL_PIXEL_FORMAT_YUV:
|
|
g_assert_not_reached ();
|
|
break;
|
|
}
|
|
|
|
/* All of the pixel formats are handled above so if this hits then
|
|
we've been given an invalid pixel format */
|
|
g_assert (glformat != 0);
|
|
|
|
if (out_glintformat != NULL)
|
|
*out_glintformat = glintformat;
|
|
if (out_glformat != NULL)
|
|
*out_glformat = glformat;
|
|
if (out_gltype != NULL)
|
|
*out_gltype = gltype;
|
|
|
|
return required_format;
|
|
}
|
|
|
|
static CoglBool
|
|
_cogl_driver_update_features (CoglContext *context,
|
|
GError **error)
|
|
{
|
|
CoglPrivateFeatureFlags private_flags = 0;
|
|
CoglFeatureFlags flags = 0;
|
|
const char *gl_extensions;
|
|
int num_stencil_bits = 0;
|
|
|
|
/* We have to special case getting the pointer to the glGetString
|
|
function because we need to use it to determine what functions we
|
|
can expect */
|
|
context->glGetString =
|
|
(void *) _cogl_renderer_get_proc_address (context->display->renderer,
|
|
"glGetString",
|
|
TRUE);
|
|
|
|
COGL_NOTE (WINSYS,
|
|
"Checking features\n"
|
|
" GL_VENDOR: %s\n"
|
|
" GL_RENDERER: %s\n"
|
|
" GL_VERSION: %s\n"
|
|
" GL_EXTENSIONS: %s",
|
|
context->glGetString (GL_VENDOR),
|
|
context->glGetString (GL_RENDERER),
|
|
_cogl_context_get_gl_version (context),
|
|
_cogl_context_get_gl_extensions (context));
|
|
|
|
_cogl_gpu_info_init (context, &context->gpu);
|
|
|
|
gl_extensions = _cogl_context_get_gl_extensions (context);
|
|
|
|
_cogl_feature_check_ext_functions (context,
|
|
-1 /* GL major version */,
|
|
-1 /* GL minor version */,
|
|
gl_extensions);
|
|
|
|
GE( context, glGetIntegerv (GL_STENCIL_BITS, &num_stencil_bits) );
|
|
/* We need at least three stencil bits to combine clips */
|
|
if (num_stencil_bits > 2)
|
|
private_flags |= COGL_PRIVATE_FEATURE_STENCIL_BUFFER;
|
|
|
|
#ifdef HAVE_COGL_GLES
|
|
if (context->driver == COGL_DRIVER_GLES1)
|
|
{
|
|
int max_clip_planes;
|
|
GE( context, glGetIntegerv (GL_MAX_CLIP_PLANES, &max_clip_planes) );
|
|
if (max_clip_planes >= 4)
|
|
private_flags |= COGL_PRIVATE_FEATURE_FOUR_CLIP_PLANES;
|
|
}
|
|
#endif
|
|
|
|
if (context->driver == COGL_DRIVER_GLES2)
|
|
{
|
|
flags |= COGL_FEATURE_SHADERS_GLSL | COGL_FEATURE_OFFSCREEN;
|
|
/* Note GLES 2 core doesn't support mipmaps for npot textures or
|
|
* repeat modes other than CLAMP_TO_EDGE. */
|
|
flags |= COGL_FEATURE_TEXTURE_NPOT_BASIC;
|
|
flags |= COGL_FEATURE_DEPTH_RANGE;
|
|
COGL_FLAGS_SET (context->features, COGL_FEATURE_ID_GLSL, TRUE);
|
|
COGL_FLAGS_SET (context->features, COGL_FEATURE_ID_OFFSCREEN, TRUE);
|
|
COGL_FLAGS_SET (context->features,
|
|
COGL_FEATURE_ID_TEXTURE_NPOT_BASIC, TRUE);
|
|
COGL_FLAGS_SET (context->features, COGL_FEATURE_ID_DEPTH_RANGE, TRUE);
|
|
COGL_FLAGS_SET (context->features,
|
|
COGL_FEATURE_ID_MIRRORED_REPEAT, TRUE);
|
|
}
|
|
|
|
private_flags |= COGL_PRIVATE_FEATURE_VBOS;
|
|
|
|
/* Both GLES 1.1 and GLES 2.0 support point sprites in core */
|
|
flags |= COGL_FEATURE_POINT_SPRITE;
|
|
COGL_FLAGS_SET (context->features, COGL_FEATURE_ID_POINT_SPRITE, TRUE);
|
|
|
|
if (context->glGenRenderbuffers)
|
|
{
|
|
flags |= COGL_FEATURE_OFFSCREEN;
|
|
COGL_FLAGS_SET (context->features, COGL_FEATURE_ID_OFFSCREEN, TRUE);
|
|
}
|
|
|
|
if (context->glBlitFramebuffer)
|
|
private_flags |= COGL_PRIVATE_FEATURE_OFFSCREEN_BLIT;
|
|
|
|
if (_cogl_check_extension ("GL_OES_element_index_uint", gl_extensions))
|
|
{
|
|
flags |= COGL_FEATURE_UNSIGNED_INT_INDICES;
|
|
COGL_FLAGS_SET (context->features,
|
|
COGL_FEATURE_ID_UNSIGNED_INT_INDICES, TRUE);
|
|
}
|
|
|
|
if (_cogl_check_extension ("GL_OES_depth_texture", gl_extensions))
|
|
{
|
|
flags |= COGL_FEATURE_DEPTH_TEXTURE;
|
|
COGL_FLAGS_SET (context->features, COGL_FEATURE_ID_DEPTH_TEXTURE, TRUE);
|
|
}
|
|
|
|
if (_cogl_check_extension ("GL_OES_texture_npot", gl_extensions))
|
|
{
|
|
flags |= (COGL_FEATURE_TEXTURE_NPOT |
|
|
COGL_FEATURE_TEXTURE_NPOT_BASIC |
|
|
COGL_FEATURE_TEXTURE_NPOT_MIPMAP |
|
|
COGL_FEATURE_TEXTURE_NPOT_REPEAT);
|
|
COGL_FLAGS_SET (context->features,
|
|
COGL_FEATURE_ID_TEXTURE_NPOT, TRUE);
|
|
COGL_FLAGS_SET (context->features,
|
|
COGL_FEATURE_ID_TEXTURE_NPOT_BASIC, TRUE);
|
|
COGL_FLAGS_SET (context->features,
|
|
COGL_FEATURE_ID_TEXTURE_NPOT_MIPMAP, TRUE);
|
|
COGL_FLAGS_SET (context->features,
|
|
COGL_FEATURE_ID_TEXTURE_NPOT_REPEAT, TRUE);
|
|
}
|
|
else if (_cogl_check_extension ("GL_IMG_texture_npot", gl_extensions))
|
|
{
|
|
flags |= (COGL_FEATURE_TEXTURE_NPOT_BASIC |
|
|
COGL_FEATURE_TEXTURE_NPOT_MIPMAP);
|
|
COGL_FLAGS_SET (context->features,
|
|
COGL_FEATURE_ID_TEXTURE_NPOT_BASIC, TRUE);
|
|
COGL_FLAGS_SET (context->features,
|
|
COGL_FEATURE_ID_TEXTURE_NPOT_MIPMAP, TRUE);
|
|
}
|
|
|
|
if (context->glTexImage3D)
|
|
{
|
|
flags |= COGL_FEATURE_TEXTURE_3D;
|
|
COGL_FLAGS_SET (context->features, COGL_FEATURE_ID_TEXTURE_3D, TRUE);
|
|
}
|
|
|
|
if (context->glMapBuffer)
|
|
{
|
|
/* The GL_OES_mapbuffer extension doesn't support mapping for
|
|
read */
|
|
flags |= COGL_FEATURE_MAP_BUFFER_FOR_WRITE;
|
|
COGL_FLAGS_SET (context->features,
|
|
COGL_FEATURE_ID_MAP_BUFFER_FOR_WRITE, TRUE);
|
|
}
|
|
|
|
if (context->glEGLImageTargetTexture2D)
|
|
private_flags |= COGL_PRIVATE_FEATURE_TEXTURE_2D_FROM_EGL_IMAGE;
|
|
|
|
if (_cogl_check_extension ("GL_OES_packed_depth_stencil", gl_extensions))
|
|
private_flags |= COGL_PRIVATE_FEATURE_OES_PACKED_DEPTH_STENCIL;
|
|
|
|
if (_cogl_check_extension ("GL_EXT_texture_format_BGRA8888", gl_extensions))
|
|
private_flags |= COGL_PRIVATE_FEATURE_TEXTURE_FORMAT_BGRA8888;
|
|
|
|
if (_cogl_check_extension ("GL_EXT_unpack_subimage", gl_extensions))
|
|
private_flags |= COGL_PRIVATE_FEATURE_UNPACK_SUBIMAGE;
|
|
|
|
/* Cache features */
|
|
context->private_feature_flags |= private_flags;
|
|
context->feature_flags |= flags;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
const CoglDriverVtable
|
|
_cogl_driver_gles =
|
|
{
|
|
_cogl_driver_pixel_format_from_gl_internal,
|
|
_cogl_driver_pixel_format_to_gl,
|
|
_cogl_driver_update_features,
|
|
_cogl_offscreen_gl_allocate,
|
|
_cogl_offscreen_gl_free,
|
|
_cogl_framebuffer_gl_flush_state,
|
|
_cogl_framebuffer_gl_clear,
|
|
_cogl_framebuffer_gl_query_bits,
|
|
_cogl_framebuffer_gl_finish,
|
|
_cogl_framebuffer_gl_discard_buffers,
|
|
_cogl_framebuffer_gl_draw_attributes,
|
|
_cogl_framebuffer_gl_draw_indexed_attributes,
|
|
};
|