workbench/libs/mesa/src/mesa/main/version.c

   1 /*
   2  * Mesa 3-D graphics library
   3  *
   4  * Copyright (C) 2010  VMware, Inc.  All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the "Software"),
   8  * to deal in the Software without restriction, including without limitation
   9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  10  * and/or sell copies of the Software, and to permit persons to whom the
  11  * Software is furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included
  14  * in all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  17  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  19  * THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  20  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  21  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  22  */
  23
  24
  25 #include "imports.h"
  26 #include "mtypes.h"
  27 #include "version.h"
  28 #ifdef MESA_GIT_SHA1
  29 #include "git_sha1.h"
  30 #endif
  31
  32
  33
  34 /**
  35  * Examine enabled GL extensions to determine GL version.
  36  * Return major and minor version numbers.
  37  */
  38 static void
  39 compute_version(struct gl_context *ctx)
  40 {
  41    GLuint major, minor;
  42    static const int max = 100;
  43
  44    const GLboolean ver_1_3 = (ctx->Extensions.ARB_multisample &&
  45                               ctx->Extensions.ARB_multitexture &&
  46                               ctx->Extensions.ARB_texture_border_clamp &&
  47                               ctx->Extensions.ARB_texture_compression &&
  48                               ctx->Extensions.ARB_texture_cube_map &&
  49                               ctx->Extensions.EXT_texture_env_add &&
  50                               ctx->Extensions.ARB_texture_env_combine &&
  51                               ctx->Extensions.ARB_texture_env_dot3);
  52    const GLboolean ver_1_4 = (ver_1_3 &&
  53                               ctx->Extensions.ARB_depth_texture &&
  54                               ctx->Extensions.ARB_shadow &&
  55                               ctx->Extensions.ARB_texture_env_crossbar &&
  56                               ctx->Extensions.ARB_texture_mirrored_repeat &&
  57                               ctx->Extensions.ARB_window_pos &&
  58                               ctx->Extensions.EXT_blend_color &&
  59                               ctx->Extensions.EXT_blend_func_separate &&
  60                               ctx->Extensions.EXT_blend_minmax &&
  61                               ctx->Extensions.EXT_blend_subtract &&
  62                               ctx->Extensions.EXT_fog_coord &&
  63                               ctx->Extensions.EXT_multi_draw_arrays &&
  64                               ctx->Extensions.EXT_point_parameters &&
  65                               ctx->Extensions.EXT_secondary_color &&
  66                               ctx->Extensions.EXT_stencil_wrap &&
  67                               ctx->Extensions.EXT_texture_lod_bias &&
  68                               ctx->Extensions.SGIS_generate_mipmap);
  69    const GLboolean ver_1_5 = (ver_1_4 &&
  70                               ctx->Extensions.ARB_occlusion_query &&
  71                               ctx->Extensions.ARB_vertex_buffer_object &&
  72                               ctx->Extensions.EXT_shadow_funcs);
  73    const GLboolean ver_2_0 = (ver_1_5 &&
  74                               ctx->Extensions.ARB_draw_buffers &&
  75                               ctx->Extensions.ARB_point_sprite &&
  76                               ctx->Extensions.ARB_shader_objects &&
  77                               ctx->Extensions.ARB_vertex_shader &&
  78                               ctx->Extensions.ARB_fragment_shader &&
  79                               ctx->Extensions.ARB_texture_non_power_of_two &&
  80                               ctx->Extensions.EXT_blend_equation_separate &&
  81
  82                               /* Technically, 2.0 requires the functionality
  83                                * of the EXT version.  Enable 2.0 if either
  84                                * extension is available, and assume that a
  85                                * driver that only exposes the ATI extension
  86                                * will fallback to software when necessary.
  87                                */
  88                               (ctx->Extensions.EXT_stencil_two_side
  89                                || ctx->Extensions.ATI_separate_stencil));
  90    const GLboolean ver_2_1 = (ver_2_0 &&
  91                               ctx->Const.GLSLVersion >= 120 &&
  92                               ctx->Extensions.EXT_pixel_buffer_object &&
  93                               ctx->Extensions.EXT_texture_sRGB);
  94    const GLboolean ver_3_0 = (ver_2_1 &&
  95                               ctx->Extensions.ARB_color_buffer_float &&
  96                               ctx->Extensions.ARB_depth_buffer_float &&
  97                               ctx->Extensions.ARB_half_float_pixel &&
  98                               ctx->Extensions.ARB_map_buffer_range &&
  99                               ctx->Extensions.ARB_texture_float &&
 100                               ctx->Extensions.ARB_texture_rg &&
 101                               ctx->Extensions.ARB_texture_compression_rgtc &&
 102                               ctx->Extensions.APPLE_vertex_array_object &&
 103                               ctx->Extensions.EXT_draw_buffers2 &&
 104                               ctx->Extensions.EXT_framebuffer_blit &&
 105                               ctx->Extensions.EXT_framebuffer_multisample &&
 106                               ctx->Extensions.EXT_framebuffer_object &&
 107                               ctx->Extensions.EXT_framebuffer_sRGB &&
 108                               ctx->Extensions.EXT_packed_depth_stencil &&
 109                               ctx->Extensions.EXT_packed_float &&
 110                               ctx->Extensions.EXT_texture_array &&
 111                               ctx->Extensions.EXT_texture_integer &&
 112                               ctx->Extensions.EXT_texture_shared_exponent &&
 113                               ctx->Extensions.EXT_transform_feedback &&
 114                               ctx->Extensions.NV_conditional_render);
 115    const GLboolean ver_3_1 = (ver_3_0 &&
 116                               ctx->Extensions.ARB_copy_buffer &&
 117                               ctx->Extensions.ARB_draw_instanced &&
 118                               ctx->Extensions.ARB_texture_buffer_object &&
 119                               ctx->Extensions.ARB_uniform_buffer_object &&
 120                               ctx->Extensions.EXT_texture_snorm &&
 121                               ctx->Extensions.NV_primitive_restart &&
 122                               ctx->Extensions.NV_texture_rectangle &&
 123                               ctx->Const.MaxVertexTextureImageUnits >= 16);
 124    const GLboolean ver_3_2 = (ver_3_1 &&
 125                               ctx->Extensions.ARB_depth_clamp &&
 126                               ctx->Extensions.ARB_draw_elements_base_vertex &&
 127                               ctx->Extensions.ARB_fragment_coord_conventions &&
 128                               ctx->Extensions.ARB_geometry_shader4 &&
 129                               ctx->Extensions.EXT_provoking_vertex &&
 130                               ctx->Extensions.ARB_seamless_cube_map &&
 131                               ctx->Extensions.ARB_sync &&
 132                               ctx->Extensions.ARB_texture_multisample &&
 133                               ctx->Extensions.EXT_vertex_array_bgra);
 134    const GLboolean ver_3_3 = (ver_3_2 &&
 135                               ctx->Extensions.ARB_blend_func_extended &&
 136                               ctx->Extensions.ARB_explicit_attrib_location &&
 137                               ctx->Extensions.ARB_instanced_arrays &&
 138                               ctx->Extensions.ARB_occlusion_query2 &&
 139                               ctx->Extensions.ARB_sampler_objects &&
 140                               ctx->Extensions.ARB_texture_rgb10_a2ui &&
 141                               ctx->Extensions.ARB_timer_query &&
 142                               ctx->Extensions.ARB_vertex_type_2_10_10_10_rev &&
 143                               ctx->Extensions.EXT_texture_swizzle);
 144
 145    if (ver_3_3) {
 146       major = 3;
 147       minor = 3;
 148    }
 149    else if (ver_3_2) {
 150       major = 3;
 151       minor = 2;
 152    }
 153    else if (ver_3_1) {
 154       major = 3;
 155       minor = 1;
 156    }
 157    else if (ver_3_0) {
 158       major = 3;
 159       minor = 0;
 160    }
 161    else if (ver_2_1) {
 162       major = 2;
 163       minor = 1;
 164    }
 165    else if (ver_2_0) {
 166       major = 2;
 167       minor = 0;
 168    }
 169    else if (ver_1_5) {
 170       major = 1;
 171       minor = 5;
 172    }
 173    else if (ver_1_4) {
 174       major = 1;
 175       minor = 4;
 176    }
 177    else if (ver_1_3) {
 178       major = 1;
 179       minor = 3;
 180    }
 181    else {
 182       major = 1;
 183       minor = 2;
 184    }
 185
 186    ctx->VersionMajor = major;
 187    ctx->VersionMinor = minor;
 188    ctx->VersionString = (char *) malloc(max);
 189    if (ctx->VersionString) {
 190       _mesa_snprintf(ctx->VersionString, max,
 191                      "%u.%u Mesa " MESA_VERSION_STRING
 192 #ifdef MESA_GIT_SHA1
 193                      " (" MESA_GIT_SHA1 ")"
 194 #endif
 195                      ,
 196                      ctx->VersionMajor, ctx->VersionMinor);
 197    }
 198 }
 199
 200 static void
 201 compute_version_es1(struct gl_context *ctx)
 202 {
 203    static const int max = 100;
 204
 205    /* OpenGL ES 1.0 is derived from OpenGL 1.3 */
 206    const GLboolean ver_1_0 = (ctx->Extensions.ARB_multisample &&
 207                               ctx->Extensions.ARB_multitexture &&
 208                               ctx->Extensions.ARB_texture_compression &&
 209                               ctx->Extensions.EXT_texture_env_add &&
 210                               ctx->Extensions.ARB_texture_env_combine &&
 211                               ctx->Extensions.ARB_texture_env_dot3);
 212    /* OpenGL ES 1.1 is derived from OpenGL 1.5 */
 213    const GLboolean ver_1_1 = (ver_1_0 &&
 214                               ctx->Extensions.EXT_point_parameters &&
 215                               ctx->Extensions.SGIS_generate_mipmap &&
 216                               ctx->Extensions.ARB_vertex_buffer_object);
 217
 218    if (ver_1_1) {
 219       ctx->VersionMajor = 1;
 220       ctx->VersionMinor = 1;
 221    } else if (ver_1_0) {
 222       ctx->VersionMajor = 1;
 223       ctx->VersionMinor = 0;
 224    } else {
 225       _mesa_problem(ctx, "Incomplete OpenGL ES 1.0 support.");
 226    }
 227
 228    ctx->VersionString = (char *) malloc(max);
 229    if (ctx->VersionString) {
 230       _mesa_snprintf(ctx->VersionString, max,
 231                      "OpenGL ES-CM 1.%d Mesa " MESA_VERSION_STRING,
 232                      ctx->VersionMinor);
 233    }
 234 }
 235
 236 static void
 237 compute_version_es2(struct gl_context *ctx)
 238 {
 239    static const int max = 100;
 240
 241    /* OpenGL ES 2.0 is derived from OpenGL 2.0 */
 242    const GLboolean ver_2_0 = (ctx->Extensions.ARB_multisample &&
 243                               ctx->Extensions.ARB_multitexture &&
 244                               ctx->Extensions.ARB_texture_compression &&
 245                               ctx->Extensions.ARB_texture_cube_map &&
 246                               ctx->Extensions.ARB_texture_mirrored_repeat &&
 247                               ctx->Extensions.EXT_blend_color &&
 248                               ctx->Extensions.EXT_blend_func_separate &&
 249                               ctx->Extensions.EXT_blend_minmax &&
 250                               ctx->Extensions.EXT_blend_subtract &&
 251                               ctx->Extensions.EXT_stencil_wrap &&
 252                               ctx->Extensions.ARB_vertex_buffer_object &&
 253                               ctx->Extensions.ARB_shader_objects &&
 254                               ctx->Extensions.ARB_vertex_shader &&
 255                               ctx->Extensions.ARB_fragment_shader &&
 256                               ctx->Extensions.ARB_texture_non_power_of_two &&
 257                               ctx->Extensions.EXT_blend_equation_separate);
 258    if (ver_2_0) {
 259       ctx->VersionMajor = 2;
 260       ctx->VersionMinor = 0;
 261    } else {
 262       _mesa_problem(ctx, "Incomplete OpenGL ES 2.0 support.");
 263    }
 264
 265    ctx->VersionString = (char *) malloc(max);
 266    if (ctx->VersionString) {
 267       _mesa_snprintf(ctx->VersionString, max,
 268                      "OpenGL ES 2.0 Mesa " MESA_VERSION_STRING);
 269    }
 270 }
 271
 272 /**
 273  * Set the context's VersionMajor, VersionMinor, VersionString fields.
 274  * This should only be called once as part of context initialization
 275  * or to perform version check for GLX_ARB_create_context_profile.
 276  */
 277 void
 278 _mesa_compute_version(struct gl_context *ctx)
 279 {
 280    if (ctx->VersionMajor)
 281       return;
 282
 283    switch (ctx->API) {
 284    case API_OPENGL:
 285       compute_version(ctx);
 286       break;
 287    case API_OPENGLES:
 288       compute_version_es1(ctx);
 289       break;
 290    case API_OPENGLES2:
 291       compute_version_es2(ctx);
 292       break;
 293    }
 294
 295 }