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 #include "git_sha1.h"
  29
  30
  31
  32 /**
  33  * Examine enabled GL extensions to determine GL version.
  34  * Return major and minor version numbers.
  35  */
  36 static void
  37 compute_version(struct gl_context *ctx)
  38 {
  39    GLuint major, minor;
  40    static const int max = 100;
  41
  42    const GLboolean ver_1_3 = (ctx->Extensions.ARB_multisample &&
  43                               ctx->Extensions.ARB_multitexture &&
  44                               ctx->Extensions.ARB_texture_border_clamp &&
  45                               ctx->Extensions.ARB_texture_compression &&
  46                               ctx->Extensions.ARB_texture_cube_map &&
  47                               ctx->Extensions.EXT_texture_env_add &&
  48                               ctx->Extensions.ARB_texture_env_combine &&
  49                               ctx->Extensions.ARB_texture_env_dot3);
  50    const GLboolean ver_1_4 = (ver_1_3 &&
  51                               ctx->Extensions.ARB_depth_texture &&
  52                               ctx->Extensions.ARB_shadow &&
  53                               ctx->Extensions.ARB_texture_env_crossbar &&
  54                               ctx->Extensions.ARB_texture_mirrored_repeat &&
  55                               ctx->Extensions.ARB_window_pos &&
  56                               ctx->Extensions.EXT_blend_color &&
  57                               ctx->Extensions.EXT_blend_func_separate &&
  58                               ctx->Extensions.EXT_blend_minmax &&
  59                               ctx->Extensions.EXT_blend_subtract &&
  60                               ctx->Extensions.EXT_fog_coord &&
  61                               ctx->Extensions.EXT_multi_draw_arrays &&
  62                               ctx->Extensions.EXT_point_parameters &&
  63                               ctx->Extensions.EXT_secondary_color &&
  64                               ctx->Extensions.EXT_stencil_wrap &&
  65                               ctx->Extensions.EXT_texture_lod_bias &&
  66                               ctx->Extensions.SGIS_generate_mipmap);
  67    const GLboolean ver_1_5 = (ver_1_4 &&
  68                               ctx->Extensions.ARB_occlusion_query &&
  69                               ctx->Extensions.ARB_vertex_buffer_object &&
  70                               ctx->Extensions.EXT_shadow_funcs);
  71    const GLboolean ver_2_0 = (ver_1_5 &&
  72                               ctx->Extensions.ARB_draw_buffers &&
  73                               ctx->Extensions.ARB_point_sprite &&
  74                               ctx->Extensions.ARB_shader_objects &&
  75                               ctx->Extensions.ARB_vertex_shader &&
  76                               ctx->Extensions.ARB_fragment_shader &&
  77                               ctx->Extensions.ARB_texture_non_power_of_two &&
  78                               ctx->Extensions.EXT_blend_equation_separate &&
  79
  80                               /* Technically, 2.0 requires the functionality
  81                                * of the EXT version.  Enable 2.0 if either
  82                                * extension is available, and assume that a
  83                                * driver that only exposes the ATI extension
  84                                * will fallback to software when necessary.
  85                                */
  86                               (ctx->Extensions.EXT_stencil_two_side
  87                                || ctx->Extensions.ATI_separate_stencil));
  88    const GLboolean ver_2_1 = (ver_2_0 &&
  89                               ctx->Const.GLSLVersion >= 120 &&
  90                               ctx->Extensions.EXT_pixel_buffer_object &&
  91                               ctx->Extensions.EXT_texture_sRGB);
  92    const GLboolean ver_3_0 = (ver_2_1 &&
  93                               ctx->Extensions.ARB_color_buffer_float &&
  94                               ctx->Extensions.ARB_depth_buffer_float &&
  95                               ctx->Extensions.ARB_half_float_pixel &&
  96                               ctx->Extensions.ARB_map_buffer_range &&
  97                               ctx->Extensions.ARB_texture_float &&
  98                               ctx->Extensions.ARB_texture_rg &&
  99                               ctx->Extensions.ARB_texture_compression_rgtc &&
 100                               ctx->Extensions.APPLE_vertex_array_object &&
 101                               ctx->Extensions.EXT_draw_buffers2 &&
 102                               ctx->Extensions.EXT_framebuffer_blit &&
 103                               ctx->Extensions.EXT_framebuffer_multisample &&
 104                               ctx->Extensions.EXT_framebuffer_object &&
 105                               ctx->Extensions.EXT_framebuffer_sRGB &&
 106                               ctx->Extensions.EXT_packed_depth_stencil &&
 107                               ctx->Extensions.EXT_packed_float &&
 108                               ctx->Extensions.EXT_texture_array &&
 109                               ctx->Extensions.EXT_texture_integer &&
 110                               ctx->Extensions.EXT_texture_shared_exponent &&
 111                               ctx->Extensions.EXT_transform_feedback &&
 112                               ctx->Extensions.NV_conditional_render);
 113    const GLboolean ver_3_1 = (ver_3_0 &&
 114                               ctx->Extensions.ARB_copy_buffer &&
 115                               ctx->Extensions.ARB_draw_instanced &&
 116                               ctx->Extensions.ARB_texture_buffer_object &&
 117                               ctx->Extensions.ARB_uniform_buffer_object &&
 118                               ctx->Extensions.EXT_texture_snorm &&
 119                               ctx->Extensions.NV_primitive_restart &&
 120                               ctx->Extensions.NV_texture_rectangle &&
 121                               ctx->Const.MaxVertexTextureImageUnits >= 16);
 122    const GLboolean ver_3_2 = (ver_3_1 &&
 123                               ctx->Extensions.ARB_depth_clamp &&
 124                               ctx->Extensions.ARB_draw_elements_base_vertex &&
 125                               ctx->Extensions.ARB_fragment_coord_conventions &&
 126                               ctx->Extensions.ARB_geometry_shader4 &&
 127                               ctx->Extensions.EXT_provoking_vertex &&
 128                               ctx->Extensions.ARB_seamless_cube_map &&
 129                               ctx->Extensions.ARB_sync &&
 130                               ctx->Extensions.ARB_texture_multisample &&
 131                               ctx->Extensions.EXT_vertex_array_bgra);
 132    const GLboolean ver_3_3 = (ver_3_2 &&
 133                               ctx->Extensions.ARB_blend_func_extended &&
 134                               ctx->Extensions.ARB_explicit_attrib_location &&
 135                               ctx->Extensions.ARB_instanced_arrays &&
 136                               ctx->Extensions.ARB_occlusion_query2 &&
 137                               ctx->Extensions.ARB_sampler_objects &&
 138                               ctx->Extensions.ARB_texture_rgb10_a2ui &&
 139                               ctx->Extensions.ARB_timer_query &&
 140                               ctx->Extensions.ARB_vertex_type_2_10_10_10_rev &&
 141                               ctx->Extensions.EXT_texture_swizzle);
 142
 143    if (ver_3_3) {
 144       major = 3;
 145       minor = 3;
 146    }
 147    else if (ver_3_2) {
 148       major = 3;
 149       minor = 2;
 150    }
 151    else if (ver_3_1) {
 152       major = 3;
 153       minor = 1;
 154    }
 155    else if (ver_3_0) {
 156       major = 3;
 157       minor = 0;
 158    }
 159    else if (ver_2_1) {
 160       major = 2;
 161       minor = 1;
 162    }
 163    else if (ver_2_0) {
 164       major = 2;
 165       minor = 0;
 166    }
 167    else if (ver_1_5) {
 168       major = 1;
 169       minor = 5;
 170    }
 171    else if (ver_1_4) {
 172       major = 1;
 173       minor = 4;
 174    }
 175    else if (ver_1_3) {
 176       major = 1;
 177       minor = 3;
 178    }
 179    else {
 180       major = 1;
 181       minor = 2;
 182    }
 183
 184    ctx->VersionMajor = major;
 185    ctx->VersionMinor = minor;
 186    ctx->VersionString = (char *) malloc(max);
 187    if (ctx->VersionString) {
 188       _mesa_snprintf(ctx->VersionString, max,
 189                      "%u.%u Mesa " MESA_VERSION_STRING
 190 #ifdef MESA_GIT_SHA1
 191                      " (" MESA_GIT_SHA1 ")"
 192 #endif
 193                      ,
 194                      ctx->VersionMajor, ctx->VersionMinor);
 195    }
 196 }
 197
 198 static void
 199 compute_version_es1(struct gl_context *ctx)
 200 {
 201    static const int max = 100;
 202
 203    /* OpenGL ES 1.0 is derived from OpenGL 1.3 */
 204    const GLboolean ver_1_0 = (ctx->Extensions.ARB_multisample &&
 205                               ctx->Extensions.ARB_multitexture &&
 206                               ctx->Extensions.ARB_texture_compression &&
 207                               ctx->Extensions.EXT_texture_env_add &&
 208                               ctx->Extensions.ARB_texture_env_combine &&
 209                               ctx->Extensions.ARB_texture_env_dot3);
 210    /* OpenGL ES 1.1 is derived from OpenGL 1.5 */
 211    const GLboolean ver_1_1 = (ver_1_0 &&
 212                               ctx->Extensions.EXT_point_parameters &&
 213                               ctx->Extensions.SGIS_generate_mipmap &&
 214                               ctx->Extensions.ARB_vertex_buffer_object);
 215
 216    if (ver_1_1) {
 217       ctx->VersionMajor = 1;
 218       ctx->VersionMinor = 1;
 219    } else if (ver_1_0) {
 220       ctx->VersionMajor = 1;
 221       ctx->VersionMinor = 0;
 222    } else {
 223       _mesa_problem(ctx, "Incomplete OpenGL ES 1.0 support.");
 224    }
 225
 226    ctx->VersionString = (char *) malloc(max);
 227    if (ctx->VersionString) {
 228       _mesa_snprintf(ctx->VersionString, max,
 229                      "OpenGL ES-CM 1.%d Mesa " MESA_VERSION_STRING,
 230                      ctx->VersionMinor);
 231    }
 232 }
 233
 234 static void
 235 compute_version_es2(struct gl_context *ctx)
 236 {
 237    static const int max = 100;
 238
 239    /* OpenGL ES 2.0 is derived from OpenGL 2.0 */
 240    const GLboolean ver_2_0 = (ctx->Extensions.ARB_multisample &&
 241                               ctx->Extensions.ARB_multitexture &&
 242                               ctx->Extensions.ARB_texture_compression &&
 243                               ctx->Extensions.ARB_texture_cube_map &&
 244                               ctx->Extensions.ARB_texture_mirrored_repeat &&
 245                               ctx->Extensions.EXT_blend_color &&
 246                               ctx->Extensions.EXT_blend_func_separate &&
 247                               ctx->Extensions.EXT_blend_minmax &&
 248                               ctx->Extensions.EXT_blend_subtract &&
 249                               ctx->Extensions.EXT_stencil_wrap &&
 250                               ctx->Extensions.ARB_vertex_buffer_object &&
 251                               ctx->Extensions.ARB_shader_objects &&
 252                               ctx->Extensions.ARB_vertex_shader &&
 253                               ctx->Extensions.ARB_fragment_shader &&
 254                               ctx->Extensions.ARB_texture_non_power_of_two &&
 255                               ctx->Extensions.EXT_blend_equation_separate);
 256    if (ver_2_0) {
 257       ctx->VersionMajor = 2;
 258       ctx->VersionMinor = 0;
 259    } else {
 260       _mesa_problem(ctx, "Incomplete OpenGL ES 2.0 support.");
 261    }
 262
 263    ctx->VersionString = (char *) malloc(max);
 264    if (ctx->VersionString) {
 265       _mesa_snprintf(ctx->VersionString, max,
 266                      "OpenGL ES 2.0 Mesa " MESA_VERSION_STRING);
 267    }
 268 }
 269
 270 /**
 271  * Set the context's VersionMajor, VersionMinor, VersionString fields.
 272  * This should only be called once as part of context initialization
 273  * or to perform version check for GLX_ARB_create_context_profile.
 274  */
 275 void
 276 _mesa_compute_version(struct gl_context *ctx)
 277 {
 278    if (ctx->VersionMajor)
 279       return;
 280
 281    switch (ctx->API) {
 282    case API_OPENGL:
 283       compute_version(ctx);
 284       break;
 285    case API_OPENGLES:
 286       compute_version_es1(ctx);
 287       break;
 288    case API_OPENGLES2:
 289       compute_version_es2(ctx);
 290       break;
 291    }
 292
 293 }