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/**************************************************************************
*
* Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
* 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
* TUNGSTEN GRAPHICS 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 "main/mtypes.h"
#include "main/context.h"
#include "main/imports.h"
#include "main/get.h"
const GLubyte * GLAPIENTRY _es_GetString(GLenum name);
static const GLubyte *
compute_es_version(void)
{
GET_CURRENT_CONTEXT(ctx);
static const char es_2_0[] = "OpenGL ES 2.0";
/* 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)
_mesa_problem(ctx, "Incomplete OpenGL ES 2.0 support.");
return (const GLubyte *) es_2_0;
}
static size_t
append_extension(char **str, const char *ext)
{
char *s = *str;
size_t len = strlen(ext);
if (s) {
memcpy(s, ext, len);
s[len++] = ' ';
s[len] = '\0';
*str += len;
}
else {
len++;
}
return len;
}
static size_t
make_extension_string(const GLcontext *ctx, char *str)
{
size_t len = 0;
len += append_extension(&str, "GL_OES_compressed_paletted_texture");
if (ctx->Extensions.ARB_framebuffer_object) {
len += append_extension(&str, "GL_OES_depth24");
len += append_extension(&str, "GL_OES_depth32");
len += append_extension(&str, "GL_OES_fbo_render_mipmap");
len += append_extension(&str, "GL_OES_rgb8_rgba8");
len += append_extension(&str, "GL_OES_stencil1");
len += append_extension(&str, "GL_OES_stencil4");
}
if (ctx->Extensions.EXT_vertex_array)
len += append_extension(&str, "GL_OES_element_index_uint");
if (ctx->Extensions.ARB_vertex_buffer_object)
len += append_extension(&str, "GL_OES_mapbuffer");
if (ctx->Extensions.EXT_texture3D)
len += append_extension(&str, "GL_OES_texture_3D");
if (ctx->Extensions.ARB_texture_non_power_of_two)
len += append_extension(&str, "GL_OES_texture_npot");
if (ctx->Extensions.EXT_texture_filter_anisotropic)
len += append_extension(&str, "GL_EXT_texture_filter_anisotropic");
len += append_extension(&str, "GL_EXT_texture_type_2_10_10_10_REV");
if (ctx->Extensions.ARB_depth_texture)
len += append_extension(&str, "GL_OES_depth_texture");
if (ctx->Extensions.EXT_packed_depth_stencil)
len += append_extension(&str, "GL_OES_packed_depth_stencil");
if (ctx->Extensions.ARB_fragment_shader)
len += append_extension(&str, "GL_OES_standard_derivatives");
if (ctx->Extensions.EXT_texture_compression_s3tc)
len += append_extension(&str, "GL_EXT_texture_compression_dxt1");
if (ctx->Extensions.EXT_blend_minmax)
len += append_extension(&str, "GL_EXT_blend_minmax");
if (ctx->Extensions.EXT_multi_draw_arrays)
len += append_extension(&str, "GL_EXT_multi_draw_arrays");
return len;
}
static const GLubyte *
compute_es_extensions(void)
{
GET_CURRENT_CONTEXT(ctx);
if (!ctx->Extensions.String) {
char *s;
unsigned int len;
len = make_extension_string(ctx, NULL);
s = (char *) malloc(len + 1);
if (!s)
return NULL;
make_extension_string(ctx, s);
ctx->Extensions.String = (const GLubyte *) s;
}
return ctx->Extensions.String;
}
const GLubyte * GLAPIENTRY
_es_GetString(GLenum name)
{
switch (name) {
case GL_VERSION:
return compute_es_version();
case GL_SHADING_LANGUAGE_VERSION:
return (const GLubyte *) "OpenGL ES GLSL ES 1.0.16";
case GL_EXTENSIONS:
return compute_es_extensions();
default:
return _mesa_GetString(name);
}
}
void
_mesa_initialize_context_extra(GLcontext *ctx)
{
ctx->FragmentProgram._MaintainTexEnvProgram = GL_TRUE;
ctx->VertexProgram._MaintainTnlProgram = GL_TRUE;
ctx->Point.PointSprite = GL_TRUE; /* always on for ES 2.x */
}
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