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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"
extern const GLubyte * GLAPIENTRY _es_GetString(GLenum name);
static const GLubyte *
compute_es_version(void)
{
GET_CURRENT_CONTEXT(ctx);
static const char es_1_0[] = "OpenGL ES-CM 1.0";
static const char es_1_1[] = "OpenGL ES-CM 1.1";
/* 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)
return (const GLubyte *) es_1_1;
if (!ver_1_0)
_mesa_problem(ctx, "Incomplete OpenGL ES 1.0 support.");
return (const GLubyte *) es_1_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;
/* Core additions */
len += append_extension(&str, "GL_OES_byte_coordinates");
len += append_extension(&str, "GL_OES_fixed_point");
len += append_extension(&str, "GL_OES_single_precision");
len += append_extension(&str, "GL_OES_matrix_get");
/* 1.1 required extensions */
len += append_extension(&str, "GL_OES_read_format");
len += append_extension(&str, "GL_OES_compressed_paletted_texture");
len += append_extension(&str, "GL_OES_point_size_array");
len += append_extension(&str, "GL_OES_point_sprite");
/* 1.1 deprecated extensions */
len += append_extension(&str, "GL_OES_query_matrix");
if (ctx->Extensions.EXT_blend_equation_separate)
len += append_extension(&str, "GL_OES_blend_equation_separate");
if (ctx->Extensions.EXT_blend_func_separate)
len += append_extension(&str, "GL_OES_blend_func_separate");
if (ctx->Extensions.EXT_blend_subtract)
len += append_extension(&str, "GL_OES_blend_subtract");
if (ctx->Extensions.EXT_stencil_wrap)
len += append_extension(&str, "GL_OES_stencil_wrap");
if (ctx->Extensions.ARB_texture_cube_map)
len += append_extension(&str, "GL_OES_texture_cube_map");
if (ctx->Extensions.ARB_texture_env_crossbar)
len += append_extension(&str, "GL_OES_texture_env_crossbar");
if (ctx->Extensions.ARB_texture_mirrored_repeat)
len += append_extension(&str, "GL_OES_texture_mirrored_repeat");
if (ctx->Extensions.ARB_framebuffer_object) {
len += append_extension(&str, "GL_OES_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");
len += append_extension(&str, "GL_OES_stencil8");
}
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_texture_filter_anisotropic)
len += append_extension(&str, "GL_EXT_texture_filter_anisotropic");
if (ctx->Extensions.ARB_texture_non_power_of_two)
len += append_extension(&str, "GL_ARB_texture_non_power_of_two");
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 *) _mesa_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_EXTENSIONS:
return compute_es_extensions();
default:
return _mesa_GetString(name);
}
}
void
_mesa_initialize_context_extra(GLcontext *ctx)
{
/* nothing here */
}
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