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/*
* Mesa 3-D graphics library
*
* Copyright (C) 2010 VMware, Inc. All Rights Reserved.
*
* 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 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.
*/
#include "context.h"
#include "version.h"
/**
* Examine enabled GL extensions to determine GL version.
* Return major and minor version numbers.
*/
static void
compute_version(GLcontext *ctx)
{
GLuint major, minor;
static const int max = 100;
const GLboolean ver_1_3 = (ctx->Extensions.ARB_multisample &&
ctx->Extensions.ARB_multitexture &&
ctx->Extensions.ARB_texture_border_clamp &&
ctx->Extensions.ARB_texture_compression &&
ctx->Extensions.ARB_texture_cube_map &&
ctx->Extensions.EXT_texture_env_add &&
ctx->Extensions.ARB_texture_env_combine &&
ctx->Extensions.ARB_texture_env_dot3);
const GLboolean ver_1_4 = (ver_1_3 &&
ctx->Extensions.ARB_depth_texture &&
ctx->Extensions.ARB_shadow &&
ctx->Extensions.ARB_texture_env_crossbar &&
ctx->Extensions.ARB_texture_mirrored_repeat &&
ctx->Extensions.ARB_window_pos &&
ctx->Extensions.EXT_blend_color &&
ctx->Extensions.EXT_blend_func_separate &&
ctx->Extensions.EXT_blend_minmax &&
ctx->Extensions.EXT_blend_subtract &&
ctx->Extensions.EXT_fog_coord &&
ctx->Extensions.EXT_multi_draw_arrays &&
ctx->Extensions.EXT_point_parameters &&
ctx->Extensions.EXT_secondary_color &&
ctx->Extensions.EXT_stencil_wrap &&
ctx->Extensions.EXT_texture_lod_bias &&
ctx->Extensions.SGIS_generate_mipmap);
const GLboolean ver_1_5 = (ver_1_4 &&
ctx->Extensions.ARB_occlusion_query &&
ctx->Extensions.ARB_vertex_buffer_object &&
ctx->Extensions.EXT_shadow_funcs);
const GLboolean ver_2_0 = (ver_1_5 &&
ctx->Extensions.ARB_draw_buffers &&
ctx->Extensions.ARB_point_sprite &&
ctx->Extensions.ARB_shader_objects &&
ctx->Extensions.ARB_vertex_shader &&
ctx->Extensions.ARB_fragment_shader &&
ctx->Extensions.ARB_texture_non_power_of_two &&
ctx->Extensions.EXT_blend_equation_separate &&
/* Technically, 2.0 requires the functionality
* of the EXT version. Enable 2.0 if either
* extension is available, and assume that a
* driver that only exposes the ATI extension
* will fallback to software when necessary.
*/
(ctx->Extensions.EXT_stencil_two_side
|| ctx->Extensions.ATI_separate_stencil));
const GLboolean ver_2_1 = (ver_2_0 &&
ctx->Extensions.ARB_shading_language_120 &&
ctx->Extensions.EXT_pixel_buffer_object &&
ctx->Extensions.EXT_texture_sRGB);
if (ver_2_1) {
major = 2;
minor = 1;
}
else if (ver_2_0) {
major = 2;
minor = 0;
}
else if (ver_1_5) {
major = 1;
minor = 5;
}
else if (ver_1_4) {
major = 1;
minor = 4;
}
else if (ver_1_3) {
major = 1;
minor = 3;
}
else {
major = 1;
minor = 2;
}
ctx->VersionMajor = major;
ctx->VersionMinor = minor;
ctx->VersionString = (char *) malloc(max);
if (ctx->VersionString) {
_mesa_snprintf(ctx->VersionString, max,
"%u.%u Mesa " MESA_VERSION_STRING,
ctx->VersionMajor, ctx->VersionMinor);
}
}
static void
compute_version_es1(GLcontext *ctx)
{
static const int max = 100;
/* OpenGL ES 1.0 is derived from OpenGL 1.3 */
const GLboolean ver_1_0 = (ctx->Extensions.ARB_multisample &&
ctx->Extensions.ARB_multitexture &&
ctx->Extensions.ARB_texture_compression &&
ctx->Extensions.EXT_texture_env_add &&
ctx->Extensions.ARB_texture_env_combine &&
ctx->Extensions.ARB_texture_env_dot3);
/* OpenGL ES 1.1 is derived from OpenGL 1.5 */
const GLboolean ver_1_1 = (ver_1_0 &&
ctx->Extensions.EXT_point_parameters &&
ctx->Extensions.SGIS_generate_mipmap &&
ctx->Extensions.ARB_vertex_buffer_object);
if (ver_1_1) {
ctx->VersionMajor = 1;
ctx->VersionMinor = 1;
} else if (ver_1_0) {
ctx->VersionMajor = 1;
ctx->VersionMinor = 0;
} else {
_mesa_problem(ctx, "Incomplete OpenGL ES 1.0 support.");
}
ctx->VersionString = (char *) malloc(max);
if (ctx->VersionString) {
_mesa_snprintf(ctx->VersionString, max,
"OpenGL ES-CM 1.%d Mesa " MESA_VERSION_STRING,
ctx->VersionMinor);
}
}
static void
compute_version_es2(GLcontext *ctx)
{
static const int max = 100;
/* OpenGL ES 2.0 is derived from OpenGL 2.0 */
const GLboolean ver_2_0 = (ctx->Extensions.ARB_multisample &&
ctx->Extensions.ARB_multitexture &&
ctx->Extensions.ARB_texture_compression &&
ctx->Extensions.ARB_texture_cube_map &&
ctx->Extensions.ARB_texture_mirrored_repeat &&
ctx->Extensions.EXT_blend_color &&
ctx->Extensions.EXT_blend_func_separate &&
ctx->Extensions.EXT_blend_minmax &&
ctx->Extensions.EXT_blend_subtract &&
ctx->Extensions.EXT_stencil_wrap &&
ctx->Extensions.ARB_vertex_buffer_object &&
ctx->Extensions.ARB_shader_objects &&
ctx->Extensions.ARB_vertex_shader &&
ctx->Extensions.ARB_fragment_shader &&
ctx->Extensions.ARB_texture_non_power_of_two &&
ctx->Extensions.EXT_blend_equation_separate);
if (ver_2_0) {
ctx->VersionMajor = 2;
ctx->VersionMinor = 0;
} else {
_mesa_problem(ctx, "Incomplete OpenGL ES 2.0 support.");
}
ctx->VersionString = (char *) malloc(max);
if (ctx->VersionString) {
_mesa_snprintf(ctx->VersionString, max,
"OpenGL ES 2.0 Mesa " MESA_VERSION_STRING);
}
}
/**
* Set the context's VersionMajor, VersionMinor, VersionString fields.
* This should only be called once as part of context initialization.
*/
void
_mesa_compute_version(GLcontext *ctx)
{
switch (ctx->API) {
case API_OPENGL:
compute_version(ctx);
break;
case API_OPENGLES:
compute_version_es1(ctx);
break;
case API_OPENGLES2:
compute_version_es2(ctx);
break;
}
}
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