mutter/cogl/cogl-shader-boilerplate.h
Neil Roberts b2e735ff7f Dynamically load the GL or GLES library
The GL or GLES library is now dynamically loaded by the CoglRenderer
so that it can choose between GL, GLES1 and GLES2 at runtime. The
library is loaded by the renderer because it needs to be done before
calling eglInitialize. There is a new environment variable called
COGL_DRIVER to choose between gl, gles1 or gles2.

The #ifdefs for HAVE_COGL_GL, HAVE_COGL_GLES and HAVE_COGL_GLES2 have
been changed so that they don't assume the ifdefs are mutually
exclusive. They haven't been removed entirely so that it's possible to
compile the GLES backends without the the enums from the GL headers.

When using GLX the winsys additionally dynamically loads libGL because
that also contains the GLX API. It can't be linked in directly because
that would probably conflict with the GLES API if the EGL is
selected. When compiling with EGL support the library links directly
to libEGL because it doesn't contain any GL API so it shouldn't have
any conflicts.

When building for WGL or OSX Cogl still directly links against the GL
API so there is a #define in config.h so that Cogl won't try to dlopen
the library.

Cogl-pango previously had a #ifdef to detect when the GL backend is
used so that it can sneakily pass GL_QUADS to
cogl_vertex_buffer_draw. This is now changed so that it queries the
CoglContext for the backend. However to get this to work Cogl now
needs to export the _cogl_context_get_default symbol and cogl-pango
needs some extra -I flags to so that it can include
cogl-context-private.h
2011-07-11 12:57:38 +01:00

121 lines
4.2 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:
* Robert Bragg <robert@linux.intel.com>
*/
#ifndef __COGL_SHADER_BOILERPLATE_H
#define __COGL_SHADER_BOILERPLATE_H
#include "cogl.h"
#define _COGL_COMMON_SHADER_BOILERPLATE_GL \
"#define COGL_VERSION 100\n" \
"\n" \
"#define cogl_modelview_matrix gl_ModelViewMatrix\n" \
"#define cogl_modelview_projection_matrix gl_ModelViewProjectionMatrix\n" \
"#define cogl_projection_matrix gl_ProjectionMatrix\n" \
"#define cogl_texture_matrix gl_TextureMatrix\n" \
"\n"
#define _COGL_VERTEX_SHADER_BOILERPLATE_GL \
_COGL_COMMON_SHADER_BOILERPLATE_GL \
"#define cogl_position_in gl_Vertex\n" \
"#define cogl_color_in gl_Color\n" \
"#define cogl_tex_coord_in gl_MultiTexCoord0\n" \
"#define cogl_tex_coord0_in gl_MultiTexCoord0\n" \
"#define cogl_tex_coord1_in gl_MultiTexCoord1\n" \
"#define cogl_tex_coord2_in gl_MultiTexCoord2\n" \
"#define cogl_tex_coord3_in gl_MultiTexCoord3\n" \
"#define cogl_tex_coord4_in gl_MultiTexCoord4\n" \
"#define cogl_tex_coord5_in gl_MultiTexCoord5\n" \
"#define cogl_tex_coord6_in gl_MultiTexCoord6\n" \
"#define cogl_tex_coord7_in gl_MultiTexCoord7\n" \
"#define cogl_normal_in gl_Normal\n" \
"\n" \
"#define cogl_position_out gl_Position\n" \
"#define cogl_point_size_out gl_PointSize\n" \
"#define cogl_color_out gl_FrontColor\n" \
"#define cogl_tex_coord_out gl_TexCoord\n"
#define _COGL_FRAGMENT_SHADER_BOILERPLATE_GL \
_COGL_COMMON_SHADER_BOILERPLATE_GL \
"#define cogl_color_in gl_Color\n" \
"#define cogl_tex_coord_in gl_TexCoord\n" \
"\n" \
"#define cogl_color_out gl_FragColor\n" \
"#define cogl_depth_out gl_FragDepth\n" \
"\n" \
"#define cogl_front_facing gl_FrontFacing\n"
#if 0
/* GLSL 1.2 has a bottom left origin, though later versions
* allow use of an origin_upper_left keyword which would be
* more appropriate for Cogl. */
"#define coglFragCoord gl_FragCoord\n"
#endif
#define _COGL_COMMON_SHADER_BOILERPLATE_GLES2 \
"#define COGL_VERSION 100\n" \
"\n" \
"uniform mat4 cogl_modelview_matrix;\n" \
"uniform mat4 cogl_modelview_projection_matrix;\n" \
"uniform mat4 cogl_projection_matrix;\n" \
"uniform float cogl_point_size_in;\n"
/* This declares all of the variables that we might need. This is
working on the assumption that the compiler will optimise them out
if they are not actually used. The GLSL spec for GLES at least
implies that this will happen for varyings but it doesn't
explicitly so for attributes */
#define _COGL_VERTEX_SHADER_BOILERPLATE_GLES2 \
_COGL_COMMON_SHADER_BOILERPLATE_GLES2 \
"#define cogl_color_out _cogl_color\n" \
"varying vec4 _cogl_color;\n" \
"#define cogl_tex_coord_out _cogl_tex_coord\n" \
"#define cogl_position_out gl_Position\n" \
"#define cogl_point_size_out gl_PointSize\n" \
"\n" \
"attribute vec4 cogl_color_in;\n" \
"attribute vec4 cogl_position_in;\n" \
"#define cogl_tex_coord_in cogl_tex_coord0_in;\n" \
"attribute vec3 cogl_normal_in;\n"
#define _COGL_FRAGMENT_SHADER_BOILERPLATE_GLES2 \
"#if __VERSION__ == 100\n" \
"precision highp float;\n" \
"#endif\n" \
_COGL_COMMON_SHADER_BOILERPLATE_GLES2 \
"\n" \
"varying vec4 _cogl_color;\n" \
"\n" \
"#define cogl_color_in _cogl_color\n" \
"#define cogl_tex_coord_in _cogl_tex_coord\n" \
"\n" \
"#define cogl_color_out gl_FragColor\n" \
"#define cogl_depth_out gl_FragDepth\n" \
"\n" \
"#define cogl_front_facing gl_FrontFacing\n"
#endif /* __COGL_SHADER_BOILERPLATE_H */