src/mesa/state_tracker/st_extensions.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
   4  * Copyright (c) 2008 VMware, Inc.
   5  * All Rights Reserved.
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the
   9  * "Software"), to deal in the Software without restriction, including
  10  * without limitation the rights to use, copy, modify, merge, publish,
  11  * distribute, sub license, and/or sell copies of the Software, and to
  12  * permit persons to whom the Software is furnished to do so, subject to
  13  * the following conditions:
  14  *
  15  * The above copyright notice and this permission notice (including the
  16  * next paragraph) shall be included in all copies or substantial portions
  17  * of the Software.
  18  *
  19  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  20  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  21  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  22  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  23  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  24  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  25  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  26  *
  27  **************************************************************************/
  28
  29 #include "main/imports.h"
  30 #include "main/context.h"
  31 #include "main/macros.h"
  32
  33 #include "pipe/p_context.h"
  34 #include "pipe/p_defines.h"
  35 #include "pipe/p_screen.h"
  36
  37 #include "st_context.h"
  38 #include "st_extensions.h"
  39
  40
  41 static int _min(int a, int b)
  42 {
  43    return (a < b) ? a : b;
  44 }
  45
  46 static float _maxf(float a, float b)
  47 {
  48    return (a > b) ? a : b;
  49 }
  50
  51 static int _clamp(int a, int min, int max)
  52 {
  53    if (a < min)
  54       return min;
  55    else if (a > max)
  56       return max;
  57    else
  58       return a;
  59 }
  60
  61
  62 /**
  63  * Query driver to get implementation limits.
  64  * Note that we have to limit/clamp against Mesa's internal limits too.
  65  */
  66 void st_init_limits(struct st_context *st)
  67 {
  68    struct pipe_screen *screen = st->pipe->screen;
  69    struct gl_constants *c = &st->ctx->Const;
  70    struct gl_program_constants *pc;
  71
  72    c->MaxTextureLevels
  73       = _min(screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_2D_LEVELS),
  74             MAX_TEXTURE_LEVELS);
  75
  76    c->Max3DTextureLevels
  77       = _min(screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_3D_LEVELS),
  78             MAX_3D_TEXTURE_LEVELS);
  79
  80    c->MaxCubeTextureLevels
  81       = _min(screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS),
  82             MAX_CUBE_TEXTURE_LEVELS);
  83
  84    c->MaxTextureRectSize
  85       = _min(1 << (c->MaxTextureLevels - 1), MAX_TEXTURE_RECT_SIZE);
  86
  87    c->MaxTextureImageUnits
  88       = _min(screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_IMAGE_UNITS),
  89             MAX_TEXTURE_IMAGE_UNITS);
  90
  91    c->MaxVertexTextureImageUnits
  92       = _min(screen->get_param(screen, PIPE_CAP_MAX_VERTEX_TEXTURE_UNITS),
  93              MAX_VERTEX_TEXTURE_IMAGE_UNITS);
  94
  95    c->MaxCombinedTextureImageUnits
  96       = _min(screen->get_param(screen, PIPE_CAP_MAX_COMBINED_SAMPLERS),
  97              MAX_COMBINED_TEXTURE_IMAGE_UNITS);
  98
  99    c->MaxTextureCoordUnits
 100       = _min(c->MaxTextureImageUnits, MAX_TEXTURE_COORD_UNITS);
 101
 102    c->MaxTextureUnits = _min(c->MaxTextureImageUnits, c->MaxTextureCoordUnits);
 103
 104    c->MaxDrawBuffers
 105       = _clamp(screen->get_param(screen, PIPE_CAP_MAX_RENDER_TARGETS),
 106               1, MAX_DRAW_BUFFERS);
 107
 108    c->MaxLineWidth
 109       = _maxf(1.0f, screen->get_paramf(screen, PIPE_CAP_MAX_LINE_WIDTH));
 110    c->MaxLineWidthAA
 111       = _maxf(1.0f, screen->get_paramf(screen, PIPE_CAP_MAX_LINE_WIDTH_AA));
 112
 113    c->MaxPointSize
 114       = _maxf(1.0f, screen->get_paramf(screen, PIPE_CAP_MAX_POINT_WIDTH));
 115    c->MaxPointSizeAA
 116       = _maxf(1.0f, screen->get_paramf(screen, PIPE_CAP_MAX_POINT_WIDTH_AA));
 117    /* called after _mesa_create_context/_mesa_init_point, fix default user
 118     * settable max point size up
 119     */
 120    st->ctx->Point.MaxSize = MAX2(c->MaxPointSize, c->MaxPointSizeAA);
 121    /* these are not queryable. Note that GL basically mandates a 1.0 minimum
 122     * for non-aa sizes, but we can go down to 0.0 for aa points.
 123     */
 124    c->MinPointSize = 1.0f;
 125    c->MinPointSizeAA = 0.0f;
 126
 127    c->MaxTextureMaxAnisotropy
 128       = _maxf(2.0f, screen->get_paramf(screen, PIPE_CAP_MAX_TEXTURE_ANISOTROPY));
 129
 130    c->MaxTextureLodBias
 131       = screen->get_paramf(screen, PIPE_CAP_MAX_TEXTURE_LOD_BIAS);
 132
 133    c->MaxDrawBuffers
 134       = CLAMP(screen->get_param(screen, PIPE_CAP_MAX_RENDER_TARGETS),
 135               1, MAX_DRAW_BUFFERS);
 136
 137    /* Is TGSI_OPCODE_CONT supported? */
 138    /* XXX separate query for early function return? */
 139    st->ctx->Shader.EmitContReturn =
 140       screen->get_param(screen, PIPE_CAP_TGSI_CONT_SUPPORTED);
 141
 142    /* Quads always follow GL provoking rules. */
 143    c->QuadsFollowProvokingVertexConvention = GL_FALSE;
 144
 145    if (screen->get_param(screen, PIPE_CAP_GLSL)) {
 146       /*
 147        * In the lack of more fine grained capabilities, if the pipe driver supports
 148        * GLSL then assume native limits match Mesa software limits.
 149        */
 150
 151       pc = &c->FragmentProgram;
 152       pc->MaxNativeInstructions      = pc->MaxInstructions;
 153       pc->MaxNativeAluInstructions   = pc->MaxAluInstructions;
 154       pc->MaxNativeTexInstructions   = pc->MaxTexInstructions;
 155       pc->MaxNativeTexIndirections   = pc->MaxTexIndirections;
 156       pc->MaxNativeAttribs           = pc->MaxAttribs;
 157       pc->MaxNativeTemps             = pc->MaxTemps;
 158       pc->MaxNativeAddressRegs       = pc->MaxAddressRegs;
 159       pc->MaxNativeParameters        = pc->MaxParameters;
 160
 161       pc = &c->VertexProgram;
 162       pc->MaxNativeInstructions      = pc->MaxInstructions;
 163       pc->MaxNativeAluInstructions   = pc->MaxAluInstructions;
 164       pc->MaxNativeTexInstructions   = pc->MaxTexInstructions;
 165       pc->MaxNativeTexIndirections   = pc->MaxTexIndirections;
 166       pc->MaxNativeAttribs           = pc->MaxAttribs;
 167       pc->MaxNativeTemps             = pc->MaxTemps;
 168       pc->MaxNativeAddressRegs       = pc->MaxAddressRegs;
 169       pc->MaxNativeParameters        = pc->MaxParameters;
 170    } else if (screen->get_param(screen, PIPE_CAP_SM3)) {
 171       /*
 172        * Assume the hardware meets the minimum requirements
 173        * for Shader Model 3.
 174        *
 175        * See also:
 176        * - http://msdn.microsoft.com/en-us/library/bb172920(VS.85).aspx
 177        * - http://msdn.microsoft.com/en-us/library/bb172963(VS.85).aspx
 178        */
 179
 180       pc = &c->FragmentProgram;
 181       pc->MaxNativeInstructions      = 512; /* D3DMIN30SHADERINSTRUCTIONS */
 182       pc->MaxNativeAluInstructions   = pc->MaxNativeInstructions;
 183       pc->MaxNativeTexInstructions   = pc->MaxNativeInstructions;
 184       pc->MaxNativeTexIndirections   = pc->MaxNativeTexInstructions;
 185       pc->MaxNativeAttribs           = 10;
 186       pc->MaxNativeTemps             = 32;
 187       pc->MaxNativeAddressRegs       = 1; /* aL */
 188       pc->MaxNativeParameters        = 224;
 189
 190       pc = &c->VertexProgram;
 191       pc->MaxNativeInstructions      = 512; /* D3DMIN30SHADERINSTRUCTIONS */
 192       pc->MaxNativeAluInstructions   = pc->MaxNativeInstructions;
 193       pc->MaxNativeTexInstructions   = pc->MaxNativeInstructions;
 194       pc->MaxNativeTexIndirections   = pc->MaxNativeTexInstructions;
 195       pc->MaxNativeAttribs           = 16;
 196       pc->MaxNativeTemps             = 32;
 197       pc->MaxNativeAddressRegs       = 2; /* a0 and aL */
 198       pc->MaxNativeParameters        = 256;
 199    } else {
 200       /*
 201        * Assume the hardware meets the minimum requirements
 202        * for Shader Model 2.
 203        *
 204        * See also:
 205        * - http://msdn.microsoft.com/en-us/library/bb172918(VS.85).aspx
 206        * - http://msdn.microsoft.com/en-us/library/bb172961(VS.85).aspx
 207        */
 208
 209       pc = &c->FragmentProgram;
 210       pc->MaxNativeInstructions      = 96; /* D3DPS20_MIN_NUMINSTRUCTIONSLOTS */
 211       pc->MaxNativeAluInstructions   = 64;
 212       pc->MaxNativeTexInstructions   = 32;
 213       pc->MaxNativeTexIndirections   = pc->MaxNativeTexInstructions;
 214       pc->MaxNativeAttribs           = 10; /* 2 color + 8 texture coord */
 215       pc->MaxNativeTemps             = 12; /* D3DPS20_MIN_NUMTEMPS */
 216       pc->MaxNativeAddressRegs       = 0;
 217       pc->MaxNativeParameters        = 16;
 218
 219       pc = &c->VertexProgram;
 220       pc->MaxNativeInstructions      = 256;
 221       pc->MaxNativeAluInstructions   = 256;
 222       pc->MaxNativeTexInstructions   = 0;
 223       pc->MaxNativeTexIndirections   = 0;
 224       pc->MaxNativeAttribs           = 16;
 225       pc->MaxNativeTemps             = 12; /* D3DVS20_MIN_NUMTEMPS */
 226       pc->MaxNativeAddressRegs       = 2; /* a0 and aL */
 227       pc->MaxNativeParameters        = 256;
 228    }
 229
 230    if (!screen->get_param(screen, PIPE_CAP_MAX_VERTEX_TEXTURE_UNITS)) {
 231       c->VertexProgram.MaxNativeTexInstructions = 0;
 232       c->VertexProgram.MaxNativeTexIndirections = 0;
 233    }
 234 }
 235
 236
 237 /**
 238  * Use pipe_screen::get_param() to query PIPE_CAP_ values to determine
 239  * which GL extensions are supported.
 240  * Quite a few extensions are always supported because they are standard
 241  * features or can be built on top of other gallium features.
 242  * Some fine tuning may still be needed.
 243  */
 244 void st_init_extensions(struct st_context *st)
 245 {
 246    struct pipe_screen *screen = st->pipe->screen;
 247    GLcontext *ctx = st->ctx;
 248
 249    /*
 250     * Extensions that are supported by all Gallium drivers:
 251     */
 252    ctx->Extensions.ARB_copy_buffer = GL_TRUE;
 253    ctx->Extensions.ARB_fragment_coord_conventions = GL_TRUE;
 254    ctx->Extensions.ARB_fragment_program = GL_TRUE;
 255    ctx->Extensions.ARB_map_buffer_range = GL_TRUE;
 256    ctx->Extensions.ARB_multisample = GL_TRUE;
 257    ctx->Extensions.ARB_texture_border_clamp = GL_TRUE; /* XXX temp */
 258    ctx->Extensions.ARB_texture_compression = GL_TRUE;
 259    ctx->Extensions.ARB_texture_cube_map = GL_TRUE;
 260    ctx->Extensions.ARB_texture_env_combine = GL_TRUE;
 261    ctx->Extensions.ARB_texture_env_crossbar = GL_TRUE;
 262    ctx->Extensions.ARB_texture_env_dot3 = GL_TRUE;
 263    ctx->Extensions.ARB_vertex_array_object = GL_TRUE;
 264    ctx->Extensions.ARB_vertex_buffer_object = GL_TRUE;
 265    ctx->Extensions.ARB_vertex_program = GL_TRUE;
 266    ctx->Extensions.ARB_window_pos = GL_TRUE;
 267
 268    ctx->Extensions.EXT_blend_color = GL_TRUE;
 269    ctx->Extensions.EXT_blend_func_separate = GL_TRUE;
 270    ctx->Extensions.EXT_blend_logic_op = GL_TRUE;
 271    ctx->Extensions.EXT_blend_minmax = GL_TRUE;
 272    ctx->Extensions.EXT_blend_subtract = GL_TRUE;
 273    ctx->Extensions.EXT_framebuffer_blit = GL_TRUE;
 274    ctx->Extensions.EXT_framebuffer_object = GL_TRUE;
 275    ctx->Extensions.EXT_framebuffer_multisample = GL_TRUE;
 276    ctx->Extensions.EXT_fog_coord = GL_TRUE;
 277    ctx->Extensions.EXT_gpu_program_parameters = GL_TRUE;
 278    ctx->Extensions.EXT_multi_draw_arrays = GL_TRUE;
 279    ctx->Extensions.EXT_pixel_buffer_object = GL_TRUE;
 280    ctx->Extensions.EXT_point_parameters = GL_TRUE;
 281    ctx->Extensions.EXT_provoking_vertex = GL_TRUE;
 282    ctx->Extensions.EXT_secondary_color = GL_TRUE;
 283    ctx->Extensions.EXT_stencil_wrap = GL_TRUE;
 284    ctx->Extensions.EXT_texture_env_add = GL_TRUE;
 285    ctx->Extensions.EXT_texture_env_combine = GL_TRUE;
 286    ctx->Extensions.EXT_texture_env_dot3 = GL_TRUE;
 287    ctx->Extensions.EXT_texture_lod_bias = GL_TRUE;
 288    ctx->Extensions.EXT_vertex_array_bgra = GL_TRUE;
 289
 290    ctx->Extensions.APPLE_vertex_array_object = GL_TRUE;
 291
 292    ctx->Extensions.MESA_pack_invert = GL_TRUE;
 293
 294    ctx->Extensions.NV_blend_square = GL_TRUE;
 295    ctx->Extensions.NV_texgen_reflection = GL_TRUE;
 296    ctx->Extensions.NV_texture_env_combine4 = GL_TRUE;
 297    ctx->Extensions.NV_texture_rectangle = GL_TRUE;
 298 #if 0
 299    /* possibly could support the following two */
 300    ctx->Extensions.NV_vertex_program = GL_TRUE;
 301    ctx->Extensions.NV_vertex_program1_1 = GL_TRUE;
 302 #endif
 303
 304 #if FEATURE_OES_EGL_image
 305    ctx->Extensions.OES_EGL_image = GL_TRUE;
 306 #endif
 307 #if FEATURE_OES_draw_texture
 308    ctx->Extensions.OES_draw_texture = GL_TRUE;
 309 #endif
 310
 311    ctx->Extensions.SGI_color_matrix = GL_TRUE;
 312    ctx->Extensions.SGIS_generate_mipmap = GL_TRUE;
 313
 314    /*
 315     * Extensions that depend on the driver/hardware:
 316     */
 317    if (screen->get_param(screen, PIPE_CAP_MAX_RENDER_TARGETS) > 0) {
 318       ctx->Extensions.ARB_draw_buffers = GL_TRUE;
 319    }
 320
 321    if (screen->get_param(screen, PIPE_CAP_GLSL)) {
 322       ctx->Extensions.ARB_fragment_shader = GL_TRUE;
 323       ctx->Extensions.ARB_vertex_shader = GL_TRUE;
 324       ctx->Extensions.ARB_shader_objects = GL_TRUE;
 325       ctx->Extensions.ARB_shading_language_100 = GL_TRUE;
 326       ctx->Extensions.ARB_shading_language_120 = GL_TRUE;
 327    }
 328
 329    if (screen->get_param(screen, PIPE_CAP_TEXTURE_MIRROR_REPEAT) > 0) {
 330       ctx->Extensions.ARB_texture_mirrored_repeat = GL_TRUE;
 331    }
 332
 333    if (screen->get_param(screen, PIPE_CAP_BLEND_EQUATION_SEPARATE)) {
 334       ctx->Extensions.EXT_blend_equation_separate = GL_TRUE;
 335    }
 336
 337    if (screen->get_param(screen, PIPE_CAP_TEXTURE_MIRROR_CLAMP) > 0) {
 338       ctx->Extensions.EXT_texture_mirror_clamp = GL_TRUE;
 339       ctx->Extensions.ATI_texture_mirror_once = GL_TRUE;
 340    }
 341
 342    if (screen->get_param(screen, PIPE_CAP_NPOT_TEXTURES)) {
 343       ctx->Extensions.ARB_texture_non_power_of_two = GL_TRUE;
 344    }
 345
 346    if (screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_IMAGE_UNITS) > 1) {
 347       ctx->Extensions.ARB_multitexture = GL_TRUE;
 348    }
 349
 350    if (screen->get_param(screen, PIPE_CAP_TWO_SIDED_STENCIL)) {
 351       ctx->Extensions.ATI_separate_stencil = GL_TRUE;
 352       ctx->Extensions.EXT_stencil_two_side = GL_TRUE;
 353    }
 354
 355    if (screen->get_param(screen, PIPE_CAP_ANISOTROPIC_FILTER)) {
 356       ctx->Extensions.EXT_texture_filter_anisotropic = GL_TRUE;
 357    }
 358
 359    if (screen->get_param(screen, PIPE_CAP_POINT_SPRITE)) {
 360       ctx->Extensions.ARB_point_sprite = GL_TRUE;
 361       /* GL_NV_point_sprite is not supported by gallium because we don't
 362        * support the GL_POINT_SPRITE_R_MODE_NV option.
 363        */
 364    }
 365
 366    if (screen->get_param(screen, PIPE_CAP_OCCLUSION_QUERY)) {
 367       ctx->Extensions.ARB_occlusion_query = GL_TRUE;
 368    }
 369
 370    if (screen->get_param(screen, PIPE_CAP_TEXTURE_SHADOW_MAP)) {
 371       ctx->Extensions.ARB_depth_texture = GL_TRUE;
 372       ctx->Extensions.ARB_shadow = GL_TRUE;
 373       ctx->Extensions.EXT_shadow_funcs = GL_TRUE;
 374       /*ctx->Extensions.ARB_shadow_ambient = GL_TRUE;*/
 375    }
 376
 377    /* GL_EXT_packed_depth_stencil requires both the ability to render to
 378     * a depth/stencil buffer and texture from depth/stencil source.
 379     */
 380    if (screen->is_format_supported(screen, PIPE_FORMAT_S8_USCALED_Z24_UNORM,
 381                                    PIPE_TEXTURE_2D,
 382                                    PIPE_BIND_DEPTH_STENCIL, 0) &&
 383        screen->is_format_supported(screen, PIPE_FORMAT_S8_USCALED_Z24_UNORM,
 384                                    PIPE_TEXTURE_2D,
 385                                    PIPE_BIND_SAMPLER_VIEW, 0)) {
 386       ctx->Extensions.EXT_packed_depth_stencil = GL_TRUE;
 387    }
 388    else if (screen->is_format_supported(screen, PIPE_FORMAT_Z24_UNORM_S8_USCALED,
 389                                         PIPE_TEXTURE_2D,
 390                                         PIPE_BIND_DEPTH_STENCIL, 0) &&
 391             screen->is_format_supported(screen, PIPE_FORMAT_Z24_UNORM_S8_USCALED,
 392                                         PIPE_TEXTURE_2D,
 393                                         PIPE_BIND_SAMPLER_VIEW, 0)) {
 394       ctx->Extensions.EXT_packed_depth_stencil = GL_TRUE;
 395    }
 396
 397    /* sRGB support */
 398    if (screen->is_format_supported(screen, PIPE_FORMAT_A8B8G8R8_SRGB,
 399                                    PIPE_TEXTURE_2D,
 400                                    PIPE_BIND_SAMPLER_VIEW, 0) ||
 401       screen->is_format_supported(screen, PIPE_FORMAT_B8G8R8A8_SRGB,
 402                                    PIPE_TEXTURE_2D,
 403                                    PIPE_BIND_SAMPLER_VIEW, 0)) {
 404       ctx->Extensions.EXT_texture_sRGB = GL_TRUE;
 405    }
 406
 407    /* s3tc support */
 408    if (screen->is_format_supported(screen, PIPE_FORMAT_DXT5_RGBA,
 409                                    PIPE_TEXTURE_2D,
 410                                    PIPE_BIND_SAMPLER_VIEW, 0) &&
 411        (ctx->Mesa_DXTn ||
 412         screen->is_format_supported(screen, PIPE_FORMAT_DXT5_RGBA,
 413                                     PIPE_TEXTURE_2D,
 414                                     PIPE_BIND_RENDER_TARGET, 0))) {
 415       ctx->Extensions.EXT_texture_compression_s3tc = GL_TRUE;
 416       ctx->Extensions.S3_s3tc = GL_TRUE;
 417    }
 418
 419    /* ycbcr support */
 420    if (screen->is_format_supported(screen, PIPE_FORMAT_UYVY,
 421                                    PIPE_TEXTURE_2D,
 422                                    PIPE_BIND_SAMPLER_VIEW, 0) ||
 423        screen->is_format_supported(screen, PIPE_FORMAT_YUYV,
 424                                    PIPE_TEXTURE_2D,
 425                                    PIPE_BIND_SAMPLER_VIEW, 0)) {
 426       ctx->Extensions.MESA_ycbcr_texture = GL_TRUE;
 427    }
 428
 429    /* GL_ARB_framebuffer_object */
 430    if (ctx->Extensions.EXT_packed_depth_stencil) {
 431       /* we support always support GL_EXT_framebuffer_blit */
 432       ctx->Extensions.ARB_framebuffer_object = GL_TRUE;
 433    }
 434
 435    if (st->pipe->render_condition) {
 436       ctx->Extensions.NV_conditional_render = GL_TRUE;
 437    }
 438
 439    if (screen->get_param(screen, PIPE_CAP_INDEP_BLEND_ENABLE)) {
 440       ctx->Extensions.EXT_draw_buffers2 = GL_TRUE;
 441    }
 442
 443 #if 0 /* not yet */
 444    if (screen->get_param(screen, PIPE_CAP_INDEP_BLEND_FUNC)) {
 445       ctx->Extensions.ARB_draw_buffers_blend = GL_TRUE;
 446    }
 447 #endif
 448 }