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    pc = &c->FragmentProgram;
 146    pc->MaxNativeInstructions    = screen->get_param(screen, PIPE_CAP_MAX_FS_INSTRUCTIONS);
 147    pc->MaxNativeAluInstructions = screen->get_param(screen, PIPE_CAP_MAX_FS_ALU_INSTRUCTIONS);
 148    pc->MaxNativeTexInstructions = screen->get_param(screen, PIPE_CAP_MAX_FS_TEX_INSTRUCTIONS);
 149    pc->MaxNativeTexIndirections = screen->get_param(screen, PIPE_CAP_MAX_FS_TEX_INDIRECTIONS);
 150    pc->MaxNativeAttribs         = screen->get_param(screen, PIPE_CAP_MAX_FS_INPUTS);
 151    pc->MaxNativeTemps           = screen->get_param(screen, PIPE_CAP_MAX_FS_TEMPS);
 152    pc->MaxNativeAddressRegs     = screen->get_param(screen, PIPE_CAP_MAX_FS_ADDRS);
 153    pc->MaxNativeParameters      = screen->get_param(screen, PIPE_CAP_MAX_FS_CONSTS);
 154
 155    pc = &c->VertexProgram;
 156    pc->MaxNativeInstructions    = screen->get_param(screen, PIPE_CAP_MAX_VS_INSTRUCTIONS);
 157    pc->MaxNativeAluInstructions = screen->get_param(screen, PIPE_CAP_MAX_VS_ALU_INSTRUCTIONS);
 158    pc->MaxNativeTexInstructions = screen->get_param(screen, PIPE_CAP_MAX_VS_TEX_INSTRUCTIONS);
 159    pc->MaxNativeTexIndirections = screen->get_param(screen, PIPE_CAP_MAX_VS_TEX_INDIRECTIONS);
 160    pc->MaxNativeAttribs         = screen->get_param(screen, PIPE_CAP_MAX_VS_INPUTS);
 161    pc->MaxNativeTemps           = screen->get_param(screen, PIPE_CAP_MAX_VS_TEMPS);
 162    pc->MaxNativeAddressRegs     = screen->get_param(screen, PIPE_CAP_MAX_VS_ADDRS);
 163    pc->MaxNativeParameters      = screen->get_param(screen, PIPE_CAP_MAX_VS_CONSTS);
 164
 165    /* PIPE_CAP_MAX_FS_INPUTS specifies the number of COLORn + GENERICn inputs
 166     * and is set in MaxNativeAttribs. It's always 2 colors + N generic
 167     * attributes. The GLSL compiler never uses COLORn for varyings, so we
 168     * subtract the 2 colors to get the maximum number of varyings (generic
 169     * attributes) supported by a driver. */
 170    c->MaxVarying = screen->get_param(screen, PIPE_CAP_MAX_FS_INPUTS) - 2;
 171 }
 172
 173
 174 /**
 175  * Use pipe_screen::get_param() to query PIPE_CAP_ values to determine
 176  * which GL extensions are supported.
 177  * Quite a few extensions are always supported because they are standard
 178  * features or can be built on top of other gallium features.
 179  * Some fine tuning may still be needed.
 180  */
 181 void st_init_extensions(struct st_context *st)
 182 {
 183    struct pipe_screen *screen = st->pipe->screen;
 184    GLcontext *ctx = st->ctx;
 185
 186    /*
 187     * Extensions that are supported by all Gallium drivers:
 188     */
 189    ctx->Extensions.ARB_copy_buffer = GL_TRUE;
 190    ctx->Extensions.ARB_draw_elements_base_vertex = GL_TRUE;
 191    ctx->Extensions.ARB_fragment_coord_conventions = GL_TRUE;
 192    ctx->Extensions.ARB_fragment_program = GL_TRUE;
 193    ctx->Extensions.ARB_map_buffer_range = GL_TRUE;
 194    ctx->Extensions.ARB_multisample = GL_TRUE;
 195    ctx->Extensions.ARB_texture_border_clamp = GL_TRUE; /* XXX temp */
 196    ctx->Extensions.ARB_texture_compression = GL_TRUE;
 197    ctx->Extensions.ARB_texture_cube_map = GL_TRUE;
 198    ctx->Extensions.ARB_texture_env_combine = GL_TRUE;
 199    ctx->Extensions.ARB_texture_env_crossbar = GL_TRUE;
 200    ctx->Extensions.ARB_texture_env_dot3 = GL_TRUE;
 201    ctx->Extensions.ARB_vertex_array_object = GL_TRUE;
 202    ctx->Extensions.ARB_vertex_buffer_object = GL_TRUE;
 203    ctx->Extensions.ARB_vertex_program = GL_TRUE;
 204    ctx->Extensions.ARB_window_pos = GL_TRUE;
 205
 206    ctx->Extensions.EXT_blend_color = GL_TRUE;
 207    ctx->Extensions.EXT_blend_func_separate = GL_TRUE;
 208    ctx->Extensions.EXT_blend_logic_op = GL_TRUE;
 209    ctx->Extensions.EXT_blend_minmax = GL_TRUE;
 210    ctx->Extensions.EXT_blend_subtract = GL_TRUE;
 211    ctx->Extensions.EXT_framebuffer_blit = GL_TRUE;
 212    ctx->Extensions.EXT_framebuffer_object = GL_TRUE;
 213    ctx->Extensions.EXT_framebuffer_multisample = GL_TRUE;
 214    ctx->Extensions.EXT_fog_coord = GL_TRUE;
 215    ctx->Extensions.EXT_gpu_program_parameters = GL_TRUE;
 216    ctx->Extensions.EXT_multi_draw_arrays = GL_TRUE;
 217    ctx->Extensions.EXT_pixel_buffer_object = GL_TRUE;
 218    ctx->Extensions.EXT_point_parameters = GL_TRUE;
 219    ctx->Extensions.EXT_provoking_vertex = GL_TRUE;
 220    ctx->Extensions.EXT_secondary_color = GL_TRUE;
 221    ctx->Extensions.EXT_stencil_wrap = GL_TRUE;
 222    ctx->Extensions.EXT_texture_env_add = GL_TRUE;
 223    ctx->Extensions.EXT_texture_env_combine = GL_TRUE;
 224    ctx->Extensions.EXT_texture_env_dot3 = GL_TRUE;
 225    ctx->Extensions.EXT_texture_lod_bias = GL_TRUE;
 226    ctx->Extensions.EXT_vertex_array_bgra = GL_TRUE;
 227
 228    ctx->Extensions.APPLE_vertex_array_object = GL_TRUE;
 229
 230    ctx->Extensions.ATI_texture_env_combine3 = GL_TRUE;
 231
 232    ctx->Extensions.MESA_pack_invert = GL_TRUE;
 233
 234    ctx->Extensions.NV_blend_square = GL_TRUE;
 235    ctx->Extensions.NV_texgen_reflection = GL_TRUE;
 236    ctx->Extensions.NV_texture_env_combine4 = GL_TRUE;
 237    ctx->Extensions.NV_texture_rectangle = GL_TRUE;
 238 #if 0
 239    /* possibly could support the following two */
 240    ctx->Extensions.NV_vertex_program = GL_TRUE;
 241    ctx->Extensions.NV_vertex_program1_1 = GL_TRUE;
 242 #endif
 243
 244 #if FEATURE_OES_EGL_image
 245    ctx->Extensions.OES_EGL_image = GL_TRUE;
 246 #endif
 247 #if FEATURE_OES_draw_texture
 248    ctx->Extensions.OES_draw_texture = GL_TRUE;
 249 #endif
 250
 251    ctx->Extensions.SGI_color_matrix = GL_TRUE;
 252    ctx->Extensions.SGIS_generate_mipmap = GL_TRUE;
 253
 254    /*
 255     * Extensions that depend on the driver/hardware:
 256     */
 257    if (screen->get_param(screen, PIPE_CAP_MAX_RENDER_TARGETS) > 0) {
 258       ctx->Extensions.ARB_draw_buffers = GL_TRUE;
 259    }
 260
 261    if (screen->get_param(screen, PIPE_CAP_TEXTURE_SWIZZLE) > 0) {
 262       ctx->Extensions.EXT_texture_swizzle = GL_TRUE;
 263    }
 264
 265    if (screen->get_param(screen, PIPE_CAP_GLSL)) {
 266       ctx->Extensions.ARB_fragment_shader = GL_TRUE;
 267       ctx->Extensions.ARB_vertex_shader = GL_TRUE;
 268       ctx->Extensions.ARB_shader_objects = GL_TRUE;
 269       ctx->Extensions.ARB_shading_language_100 = GL_TRUE;
 270       ctx->Extensions.ARB_shading_language_120 = GL_TRUE;
 271    }
 272
 273    if (screen->get_param(screen, PIPE_CAP_TEXTURE_MIRROR_REPEAT) > 0) {
 274       ctx->Extensions.ARB_texture_mirrored_repeat = GL_TRUE;
 275    }
 276
 277    if (screen->get_param(screen, PIPE_CAP_BLEND_EQUATION_SEPARATE)) {
 278       ctx->Extensions.EXT_blend_equation_separate = GL_TRUE;
 279    }
 280
 281    if (screen->get_param(screen, PIPE_CAP_TEXTURE_MIRROR_CLAMP) > 0) {
 282       ctx->Extensions.EXT_texture_mirror_clamp = GL_TRUE;
 283       ctx->Extensions.ATI_texture_mirror_once = GL_TRUE;
 284    }
 285
 286    if (screen->get_param(screen, PIPE_CAP_NPOT_TEXTURES)) {
 287       ctx->Extensions.ARB_texture_non_power_of_two = GL_TRUE;
 288    }
 289
 290    if (screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_IMAGE_UNITS) > 1) {
 291       ctx->Extensions.ARB_multitexture = GL_TRUE;
 292    }
 293
 294    if (screen->get_param(screen, PIPE_CAP_TWO_SIDED_STENCIL)) {
 295       ctx->Extensions.ATI_separate_stencil = GL_TRUE;
 296       ctx->Extensions.EXT_stencil_two_side = GL_TRUE;
 297    }
 298
 299    if (screen->get_param(screen, PIPE_CAP_ANISOTROPIC_FILTER)) {
 300       ctx->Extensions.EXT_texture_filter_anisotropic = GL_TRUE;
 301    }
 302
 303    if (screen->get_param(screen, PIPE_CAP_POINT_SPRITE)) {
 304       ctx->Extensions.ARB_point_sprite = GL_TRUE;
 305       /* GL_NV_point_sprite is not supported by gallium because we don't
 306        * support the GL_POINT_SPRITE_R_MODE_NV option.
 307        */
 308    }
 309
 310    if (screen->get_param(screen, PIPE_CAP_OCCLUSION_QUERY)) {
 311       ctx->Extensions.ARB_occlusion_query = GL_TRUE;
 312    }
 313    if (screen->get_param(screen, PIPE_CAP_TIMER_QUERY)) {
 314      ctx->Extensions.EXT_timer_query = GL_TRUE;
 315    }
 316
 317    if (screen->get_param(screen, PIPE_CAP_TEXTURE_SHADOW_MAP)) {
 318       ctx->Extensions.ARB_depth_texture = GL_TRUE;
 319       ctx->Extensions.ARB_fragment_program_shadow = GL_TRUE;
 320       ctx->Extensions.ARB_shadow = GL_TRUE;
 321       ctx->Extensions.EXT_shadow_funcs = GL_TRUE;
 322       /*ctx->Extensions.ARB_shadow_ambient = GL_TRUE;*/
 323    }
 324
 325    /* GL_EXT_packed_depth_stencil requires both the ability to render to
 326     * a depth/stencil buffer and texture from depth/stencil source.
 327     */
 328    if (screen->is_format_supported(screen, PIPE_FORMAT_S8_USCALED_Z24_UNORM,
 329                                    PIPE_TEXTURE_2D, 0,
 330                                    PIPE_BIND_DEPTH_STENCIL, 0) &&
 331        screen->is_format_supported(screen, PIPE_FORMAT_S8_USCALED_Z24_UNORM,
 332                                    PIPE_TEXTURE_2D, 0,
 333                                    PIPE_BIND_SAMPLER_VIEW, 0)) {
 334       ctx->Extensions.EXT_packed_depth_stencil = GL_TRUE;
 335    }
 336    else if (screen->is_format_supported(screen, PIPE_FORMAT_Z24_UNORM_S8_USCALED,
 337                                         PIPE_TEXTURE_2D, 0,
 338                                         PIPE_BIND_DEPTH_STENCIL, 0) &&
 339             screen->is_format_supported(screen, PIPE_FORMAT_Z24_UNORM_S8_USCALED,
 340                                         PIPE_TEXTURE_2D, 0,
 341                                         PIPE_BIND_SAMPLER_VIEW, 0)) {
 342       ctx->Extensions.EXT_packed_depth_stencil = GL_TRUE;
 343    }
 344
 345    /* sRGB support */
 346    if (screen->is_format_supported(screen, PIPE_FORMAT_A8B8G8R8_SRGB,
 347                                    PIPE_TEXTURE_2D, 0,
 348                                    PIPE_BIND_SAMPLER_VIEW, 0) ||
 349       screen->is_format_supported(screen, PIPE_FORMAT_B8G8R8A8_SRGB,
 350                                    PIPE_TEXTURE_2D, 0,
 351                                    PIPE_BIND_SAMPLER_VIEW, 0)) {
 352       ctx->Extensions.EXT_texture_sRGB = GL_TRUE;
 353    }
 354
 355    /* s3tc support */
 356    if (screen->is_format_supported(screen, PIPE_FORMAT_DXT5_RGBA,
 357                                    PIPE_TEXTURE_2D, 0,
 358                                    PIPE_BIND_SAMPLER_VIEW, 0) &&
 359        (ctx->Mesa_DXTn ||
 360         screen->is_format_supported(screen, PIPE_FORMAT_DXT5_RGBA,
 361                                     PIPE_TEXTURE_2D, 0,
 362                                     PIPE_BIND_RENDER_TARGET, 0))) {
 363       ctx->Extensions.EXT_texture_compression_s3tc = GL_TRUE;
 364       ctx->Extensions.S3_s3tc = GL_TRUE;
 365    }
 366
 367    /* ycbcr support */
 368    if (screen->is_format_supported(screen, PIPE_FORMAT_UYVY,
 369                                    PIPE_TEXTURE_2D, 0,
 370                                    PIPE_BIND_SAMPLER_VIEW, 0) ||
 371        screen->is_format_supported(screen, PIPE_FORMAT_YUYV,
 372                                    PIPE_TEXTURE_2D, 0,
 373                                    PIPE_BIND_SAMPLER_VIEW, 0)) {
 374       ctx->Extensions.MESA_ycbcr_texture = GL_TRUE;
 375    }
 376
 377    /* GL_ARB_framebuffer_object */
 378    if (ctx->Extensions.EXT_packed_depth_stencil) {
 379       /* we support always support GL_EXT_framebuffer_blit */
 380       ctx->Extensions.ARB_framebuffer_object = GL_TRUE;
 381    }
 382
 383    if (st->pipe->render_condition) {
 384       ctx->Extensions.NV_conditional_render = GL_TRUE;
 385    }
 386
 387    if (screen->get_param(screen, PIPE_CAP_INDEP_BLEND_ENABLE)) {
 388       ctx->Extensions.EXT_draw_buffers2 = GL_TRUE;
 389    }
 390
 391    /* GL_ARB_half_float_vertex */
 392    if (screen->is_format_supported(screen, PIPE_FORMAT_R16G16B16A16_FLOAT,
 393                                    PIPE_BUFFER, 0,
 394                                    PIPE_BIND_VERTEX_BUFFER, 0)) {
 395       ctx->Extensions.ARB_half_float_vertex = GL_TRUE;
 396    }
 397
 398 #if 0 /* not yet */
 399    if (screen->get_param(screen, PIPE_CAP_INDEP_BLEND_FUNC)) {
 400       ctx->Extensions.ARB_draw_buffers_blend = GL_TRUE;
 401    }
 402 #endif
 403
 404    if (screen->get_param(screen, PIPE_CAP_GEOMETRY_SHADER4)) {
 405       ctx->Extensions.ARB_geometry_shader4 = GL_TRUE;
 406    }
 407
 408    if (screen->get_param(screen, PIPE_CAP_DEPTH_CLAMP)) {
 409       ctx->Extensions.ARB_depth_clamp = GL_TRUE;
 410    }
 411 }