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    unsigned i;
  72
  73    c->MaxTextureLevels
  74       = _min(screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_2D_LEVELS),
  75             MAX_TEXTURE_LEVELS);
  76
  77    c->Max3DTextureLevels
  78       = _min(screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_3D_LEVELS),
  79             MAX_3D_TEXTURE_LEVELS);
  80
  81    c->MaxCubeTextureLevels
  82       = _min(screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS),
  83             MAX_CUBE_TEXTURE_LEVELS);
  84
  85    c->MaxTextureRectSize
  86       = _min(1 << (c->MaxTextureLevels - 1), MAX_TEXTURE_RECT_SIZE);
  87
  88    c->MaxTextureImageUnits
  89       = _min(screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_IMAGE_UNITS),
  90             MAX_TEXTURE_IMAGE_UNITS);
  91
  92    c->MaxVertexTextureImageUnits
  93       = _min(screen->get_param(screen, PIPE_CAP_MAX_VERTEX_TEXTURE_UNITS),
  94              MAX_VERTEX_TEXTURE_IMAGE_UNITS);
  95
  96    c->MaxCombinedTextureImageUnits
  97       = _min(screen->get_param(screen, PIPE_CAP_MAX_COMBINED_SAMPLERS),
  98              MAX_COMBINED_TEXTURE_IMAGE_UNITS);
  99
 100    c->MaxTextureCoordUnits
 101       = _min(c->MaxTextureImageUnits, MAX_TEXTURE_COORD_UNITS);
 102
 103    c->MaxTextureUnits = _min(c->MaxTextureImageUnits, c->MaxTextureCoordUnits);
 104
 105    c->MaxDrawBuffers
 106       = _clamp(screen->get_param(screen, PIPE_CAP_MAX_RENDER_TARGETS),
 107               1, MAX_DRAW_BUFFERS);
 108
 109    c->MaxLineWidth
 110       = _maxf(1.0f, screen->get_paramf(screen, PIPE_CAP_MAX_LINE_WIDTH));
 111    c->MaxLineWidthAA
 112       = _maxf(1.0f, screen->get_paramf(screen, PIPE_CAP_MAX_LINE_WIDTH_AA));
 113
 114    c->MaxPointSize
 115       = _maxf(1.0f, screen->get_paramf(screen, PIPE_CAP_MAX_POINT_WIDTH));
 116    c->MaxPointSizeAA
 117       = _maxf(1.0f, screen->get_paramf(screen, PIPE_CAP_MAX_POINT_WIDTH_AA));
 118    /* called after _mesa_create_context/_mesa_init_point, fix default user
 119     * settable max point size up
 120     */
 121    st->ctx->Point.MaxSize = MAX2(c->MaxPointSize, c->MaxPointSizeAA);
 122    /* these are not queryable. Note that GL basically mandates a 1.0 minimum
 123     * for non-aa sizes, but we can go down to 0.0 for aa points.
 124     */
 125    c->MinPointSize = 1.0f;
 126    c->MinPointSizeAA = 0.0f;
 127
 128    c->MaxTextureMaxAnisotropy
 129       = _maxf(2.0f, screen->get_paramf(screen, PIPE_CAP_MAX_TEXTURE_ANISOTROPY));
 130
 131    c->MaxTextureLodBias
 132       = screen->get_paramf(screen, PIPE_CAP_MAX_TEXTURE_LOD_BIAS);
 133
 134    c->MaxDrawBuffers
 135       = CLAMP(screen->get_param(screen, PIPE_CAP_MAX_RENDER_TARGETS),
 136               1, MAX_DRAW_BUFFERS);
 137
 138    /* Quads always follow GL provoking rules. */
 139    c->QuadsFollowProvokingVertexConvention = GL_FALSE;
 140
 141    for(i = 0; i < MESA_SHADER_TYPES; ++i) {
 142       struct gl_shader_compiler_options *options = &st->ctx->ShaderCompilerOptions[i];
 143       switch(i)
 144       {
 145       case PIPE_SHADER_FRAGMENT:
 146          pc = &c->FragmentProgram;
 147          break;
 148       case PIPE_SHADER_VERTEX:
 149          pc = &c->VertexProgram;
 150          break;
 151       case PIPE_SHADER_GEOMETRY:
 152          pc = &c->GeometryProgram;
 153          break;
 154       }
 155
 156       pc->MaxNativeInstructions    = screen->get_shader_param(screen, i, PIPE_SHADER_CAP_MAX_INSTRUCTIONS);
 157       pc->MaxNativeAluInstructions = screen->get_shader_param(screen, i, PIPE_SHADER_CAP_MAX_ALU_INSTRUCTIONS);
 158       pc->MaxNativeTexInstructions = screen->get_shader_param(screen, i, PIPE_SHADER_CAP_MAX_TEX_INSTRUCTIONS);
 159       pc->MaxNativeTexIndirections = screen->get_shader_param(screen, i, PIPE_SHADER_CAP_MAX_TEX_INDIRECTIONS);
 160       pc->MaxNativeAttribs         = screen->get_shader_param(screen, i, PIPE_SHADER_CAP_MAX_INPUTS);
 161       pc->MaxNativeTemps           = screen->get_shader_param(screen, i, PIPE_SHADER_CAP_MAX_TEMPS);
 162       pc->MaxNativeAddressRegs     = screen->get_shader_param(screen, i, PIPE_SHADER_CAP_MAX_ADDRS);
 163       pc->MaxNativeParameters      = screen->get_shader_param(screen, i, PIPE_SHADER_CAP_MAX_CONSTS);
 164
 165       options->EmitNoCont = !screen->get_shader_param(screen, i, PIPE_SHADER_CAP_TGSI_CONT_SUPPORTED);
 166    }
 167
 168    /* PIPE_CAP_MAX_FS_INPUTS specifies the number of COLORn + GENERICn inputs
 169     * and is set in MaxNativeAttribs. It's always 2 colors + N generic
 170     * attributes. The GLSL compiler never uses COLORn for varyings, so we
 171     * subtract the 2 colors to get the maximum number of varyings (generic
 172     * attributes) supported by a driver. */
 173    c->MaxVarying = screen->get_shader_param(screen, PIPE_SHADER_FRAGMENT, PIPE_SHADER_CAP_MAX_INPUTS) - 2;
 174    c->MaxVarying = MIN2(c->MaxVarying, MAX_VARYING);
 175 }
 176
 177
 178 /**
 179  * Use pipe_screen::get_param() to query PIPE_CAP_ values to determine
 180  * which GL extensions are supported.
 181  * Quite a few extensions are always supported because they are standard
 182  * features or can be built on top of other gallium features.
 183  * Some fine tuning may still be needed.
 184  */
 185 void st_init_extensions(struct st_context *st)
 186 {
 187    struct pipe_screen *screen = st->pipe->screen;
 188    GLcontext *ctx = st->ctx;
 189
 190    /*
 191     * Extensions that are supported by all Gallium drivers:
 192     */
 193    ctx->Extensions.ARB_copy_buffer = GL_TRUE;
 194    ctx->Extensions.ARB_draw_elements_base_vertex = GL_TRUE;
 195    ctx->Extensions.ARB_fragment_coord_conventions = GL_TRUE;
 196    ctx->Extensions.ARB_fragment_program = GL_TRUE;
 197    ctx->Extensions.ARB_map_buffer_range = GL_TRUE;
 198    ctx->Extensions.ARB_multisample = GL_TRUE;
 199    ctx->Extensions.ARB_texture_border_clamp = GL_TRUE; /* XXX temp */
 200    ctx->Extensions.ARB_texture_compression = GL_TRUE;
 201    ctx->Extensions.ARB_texture_cube_map = GL_TRUE;
 202    ctx->Extensions.ARB_texture_env_combine = GL_TRUE;
 203    ctx->Extensions.ARB_texture_env_crossbar = GL_TRUE;
 204    ctx->Extensions.ARB_texture_env_dot3 = GL_TRUE;
 205    ctx->Extensions.ARB_vertex_array_object = GL_TRUE;
 206    ctx->Extensions.ARB_vertex_buffer_object = GL_TRUE;
 207    ctx->Extensions.ARB_vertex_program = GL_TRUE;
 208    ctx->Extensions.ARB_window_pos = GL_TRUE;
 209
 210    ctx->Extensions.EXT_blend_color = GL_TRUE;
 211    ctx->Extensions.EXT_blend_func_separate = GL_TRUE;
 212    ctx->Extensions.EXT_blend_logic_op = GL_TRUE;
 213    ctx->Extensions.EXT_blend_minmax = GL_TRUE;
 214    ctx->Extensions.EXT_blend_subtract = GL_TRUE;
 215    ctx->Extensions.EXT_framebuffer_blit = GL_TRUE;
 216    ctx->Extensions.EXT_framebuffer_object = GL_TRUE;
 217    ctx->Extensions.EXT_framebuffer_multisample = GL_TRUE;
 218    ctx->Extensions.EXT_fog_coord = GL_TRUE;
 219    ctx->Extensions.EXT_gpu_program_parameters = GL_TRUE;
 220    ctx->Extensions.EXT_multi_draw_arrays = GL_TRUE;
 221    ctx->Extensions.EXT_pixel_buffer_object = GL_TRUE;
 222    ctx->Extensions.EXT_point_parameters = GL_TRUE;
 223    ctx->Extensions.EXT_provoking_vertex = GL_TRUE;
 224    ctx->Extensions.EXT_secondary_color = GL_TRUE;
 225    ctx->Extensions.EXT_stencil_wrap = GL_TRUE;
 226    ctx->Extensions.EXT_texture_env_add = GL_TRUE;
 227    ctx->Extensions.EXT_texture_env_combine = GL_TRUE;
 228    ctx->Extensions.EXT_texture_env_dot3 = GL_TRUE;
 229    ctx->Extensions.EXT_texture_lod_bias = GL_TRUE;
 230    ctx->Extensions.EXT_vertex_array_bgra = GL_TRUE;
 231
 232    ctx->Extensions.APPLE_vertex_array_object = GL_TRUE;
 233
 234    ctx->Extensions.ATI_texture_env_combine3 = GL_TRUE;
 235
 236    ctx->Extensions.MESA_pack_invert = GL_TRUE;
 237
 238    ctx->Extensions.NV_blend_square = GL_TRUE;
 239    ctx->Extensions.NV_texgen_reflection = GL_TRUE;
 240    ctx->Extensions.NV_texture_env_combine4 = GL_TRUE;
 241    ctx->Extensions.NV_texture_rectangle = GL_TRUE;
 242 #if 0
 243    /* possibly could support the following two */
 244    ctx->Extensions.NV_vertex_program = GL_TRUE;
 245    ctx->Extensions.NV_vertex_program1_1 = GL_TRUE;
 246 #endif
 247
 248 #if FEATURE_OES_EGL_image
 249    ctx->Extensions.OES_EGL_image = GL_TRUE;
 250 #endif
 251 #if FEATURE_OES_draw_texture
 252    ctx->Extensions.OES_draw_texture = GL_TRUE;
 253 #endif
 254
 255    ctx->Extensions.SGI_color_matrix = GL_TRUE;
 256    ctx->Extensions.SGIS_generate_mipmap = GL_TRUE;
 257
 258    /*
 259     * Extensions that depend on the driver/hardware:
 260     */
 261    if (screen->get_param(screen, PIPE_CAP_MAX_RENDER_TARGETS) > 0) {
 262       ctx->Extensions.ARB_draw_buffers = GL_TRUE;
 263    }
 264
 265    if (screen->get_param(screen, PIPE_CAP_TEXTURE_SWIZZLE) > 0) {
 266       ctx->Extensions.EXT_texture_swizzle = GL_TRUE;
 267    }
 268
 269    if (screen->get_param(screen, PIPE_CAP_GLSL)) {
 270       ctx->Extensions.ARB_fragment_shader = GL_TRUE;
 271       ctx->Extensions.ARB_vertex_shader = GL_TRUE;
 272       ctx->Extensions.ARB_shader_objects = GL_TRUE;
 273       ctx->Extensions.ARB_shading_language_100 = GL_TRUE;
 274       ctx->Extensions.ARB_shading_language_120 = GL_TRUE;
 275    }
 276
 277    if (screen->get_param(screen, PIPE_CAP_TEXTURE_MIRROR_REPEAT) > 0) {
 278       ctx->Extensions.ARB_texture_mirrored_repeat = GL_TRUE;
 279    }
 280
 281    if (screen->get_param(screen, PIPE_CAP_BLEND_EQUATION_SEPARATE)) {
 282       ctx->Extensions.EXT_blend_equation_separate = GL_TRUE;
 283    }
 284
 285    if (screen->get_param(screen, PIPE_CAP_TEXTURE_MIRROR_CLAMP) > 0) {
 286       ctx->Extensions.EXT_texture_mirror_clamp = GL_TRUE;
 287       ctx->Extensions.ATI_texture_mirror_once = GL_TRUE;
 288    }
 289
 290    if (screen->get_param(screen, PIPE_CAP_NPOT_TEXTURES)) {
 291       ctx->Extensions.ARB_texture_non_power_of_two = GL_TRUE;
 292    }
 293
 294    if (screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_IMAGE_UNITS) > 1) {
 295       ctx->Extensions.ARB_multitexture = GL_TRUE;
 296    }
 297
 298    if (screen->get_param(screen, PIPE_CAP_TWO_SIDED_STENCIL)) {
 299       ctx->Extensions.ATI_separate_stencil = GL_TRUE;
 300       ctx->Extensions.EXT_stencil_two_side = GL_TRUE;
 301    }
 302
 303    if (screen->get_param(screen, PIPE_CAP_ANISOTROPIC_FILTER)) {
 304       ctx->Extensions.EXT_texture_filter_anisotropic = GL_TRUE;
 305    }
 306
 307    if (screen->get_param(screen, PIPE_CAP_POINT_SPRITE)) {
 308       ctx->Extensions.ARB_point_sprite = GL_TRUE;
 309       /* GL_NV_point_sprite is not supported by gallium because we don't
 310        * support the GL_POINT_SPRITE_R_MODE_NV option.
 311        */
 312    }
 313
 314    if (screen->get_param(screen, PIPE_CAP_OCCLUSION_QUERY)) {
 315       ctx->Extensions.ARB_occlusion_query = GL_TRUE;
 316    }
 317    if (screen->get_param(screen, PIPE_CAP_TIMER_QUERY)) {
 318      ctx->Extensions.EXT_timer_query = GL_TRUE;
 319    }
 320
 321    if (screen->get_param(screen, PIPE_CAP_TEXTURE_SHADOW_MAP)) {
 322       ctx->Extensions.ARB_depth_texture = GL_TRUE;
 323       ctx->Extensions.ARB_fragment_program_shadow = GL_TRUE;
 324       ctx->Extensions.ARB_shadow = GL_TRUE;
 325       ctx->Extensions.EXT_shadow_funcs = GL_TRUE;
 326       /*ctx->Extensions.ARB_shadow_ambient = GL_TRUE;*/
 327    }
 328
 329    /* GL_EXT_packed_depth_stencil requires both the ability to render to
 330     * a depth/stencil buffer and texture from depth/stencil source.
 331     */
 332    if (screen->is_format_supported(screen, PIPE_FORMAT_S8_USCALED_Z24_UNORM,
 333                                    PIPE_TEXTURE_2D, 0,
 334                                    PIPE_BIND_DEPTH_STENCIL, 0) &&
 335        screen->is_format_supported(screen, PIPE_FORMAT_S8_USCALED_Z24_UNORM,
 336                                    PIPE_TEXTURE_2D, 0,
 337                                    PIPE_BIND_SAMPLER_VIEW, 0)) {
 338       ctx->Extensions.EXT_packed_depth_stencil = GL_TRUE;
 339    }
 340    else if (screen->is_format_supported(screen, PIPE_FORMAT_Z24_UNORM_S8_USCALED,
 341                                         PIPE_TEXTURE_2D, 0,
 342                                         PIPE_BIND_DEPTH_STENCIL, 0) &&
 343             screen->is_format_supported(screen, PIPE_FORMAT_Z24_UNORM_S8_USCALED,
 344                                         PIPE_TEXTURE_2D, 0,
 345                                         PIPE_BIND_SAMPLER_VIEW, 0)) {
 346       ctx->Extensions.EXT_packed_depth_stencil = GL_TRUE;
 347    }
 348
 349    /* sRGB support */
 350    if (screen->is_format_supported(screen, PIPE_FORMAT_A8B8G8R8_SRGB,
 351                                    PIPE_TEXTURE_2D, 0,
 352                                    PIPE_BIND_SAMPLER_VIEW, 0) ||
 353       screen->is_format_supported(screen, PIPE_FORMAT_B8G8R8A8_SRGB,
 354                                    PIPE_TEXTURE_2D, 0,
 355                                    PIPE_BIND_SAMPLER_VIEW, 0)) {
 356       ctx->Extensions.EXT_texture_sRGB = GL_TRUE;
 357    }
 358
 359    /* s3tc support */
 360    if (screen->is_format_supported(screen, PIPE_FORMAT_DXT5_RGBA,
 361                                    PIPE_TEXTURE_2D, 0,
 362                                    PIPE_BIND_SAMPLER_VIEW, 0) &&
 363        (ctx->Mesa_DXTn ||
 364         screen->is_format_supported(screen, PIPE_FORMAT_DXT5_RGBA,
 365                                     PIPE_TEXTURE_2D, 0,
 366                                     PIPE_BIND_RENDER_TARGET, 0))) {
 367       ctx->Extensions.EXT_texture_compression_s3tc = GL_TRUE;
 368       ctx->Extensions.S3_s3tc = GL_TRUE;
 369    }
 370
 371    /* ycbcr support */
 372    if (screen->is_format_supported(screen, PIPE_FORMAT_UYVY,
 373                                    PIPE_TEXTURE_2D, 0,
 374                                    PIPE_BIND_SAMPLER_VIEW, 0) ||
 375        screen->is_format_supported(screen, PIPE_FORMAT_YUYV,
 376                                    PIPE_TEXTURE_2D, 0,
 377                                    PIPE_BIND_SAMPLER_VIEW, 0)) {
 378       ctx->Extensions.MESA_ycbcr_texture = GL_TRUE;
 379    }
 380
 381    /* GL_ARB_framebuffer_object */
 382    if (ctx->Extensions.EXT_packed_depth_stencil) {
 383       /* we support always support GL_EXT_framebuffer_blit */
 384       ctx->Extensions.ARB_framebuffer_object = GL_TRUE;
 385    }
 386
 387    if (st->pipe->render_condition) {
 388       ctx->Extensions.NV_conditional_render = GL_TRUE;
 389    }
 390
 391    if (screen->get_param(screen, PIPE_CAP_INDEP_BLEND_ENABLE)) {
 392       ctx->Extensions.EXT_draw_buffers2 = GL_TRUE;
 393    }
 394
 395    /* GL_ARB_half_float_vertex */
 396    if (screen->is_format_supported(screen, PIPE_FORMAT_R16G16B16A16_FLOAT,
 397                                    PIPE_BUFFER, 0,
 398                                    PIPE_BIND_VERTEX_BUFFER, 0)) {
 399       ctx->Extensions.ARB_half_float_vertex = GL_TRUE;
 400    }
 401
 402 #if 0 /* not yet */
 403    if (screen->get_param(screen, PIPE_CAP_INDEP_BLEND_FUNC)) {
 404       ctx->Extensions.ARB_draw_buffers_blend = GL_TRUE;
 405    }
 406 #endif
 407
 408    if (screen->get_shader_param(screen, PIPE_SHADER_GEOMETRY, PIPE_SHADER_CAP_MAX_INSTRUCTIONS) > 0) {
 409       ctx->Extensions.ARB_geometry_shader4 = GL_TRUE;
 410    }
 411
 412    if (screen->get_param(screen, PIPE_CAP_DEPTH_CLAMP)) {
 413       ctx->Extensions.ARB_depth_clamp = GL_TRUE;
 414    }
 415 }