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
  71    c->MaxTextureLevels
  72       = _min(screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_2D_LEVELS),
  73             MAX_TEXTURE_LEVELS);
  74
  75    c->Max3DTextureLevels
  76       = _min(screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_3D_LEVELS),
  77             MAX_3D_TEXTURE_LEVELS);
  78
  79    c->MaxCubeTextureLevels
  80       = _min(screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS),
  81             MAX_CUBE_TEXTURE_LEVELS);
  82
  83    c->MaxTextureRectSize
  84       = _min(1 << (c->MaxTextureLevels - 1), MAX_TEXTURE_RECT_SIZE);
  85
  86    c->MaxTextureImageUnits
  87       = _min(screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_IMAGE_UNITS),
  88             MAX_TEXTURE_IMAGE_UNITS);
  89
  90    c->MaxVertexTextureImageUnits
  91       = _min(screen->get_param(screen, PIPE_CAP_MAX_VERTEX_TEXTURE_UNITS),
  92              MAX_VERTEX_TEXTURE_IMAGE_UNITS);
  93
  94    c->MaxTextureCoordUnits
  95       = _min(c->MaxTextureImageUnits, MAX_TEXTURE_COORD_UNITS);
  96
  97    c->MaxTextureUnits = _min(c->MaxTextureImageUnits, c->MaxTextureCoordUnits);
  98
  99    c->MaxDrawBuffers
 100       = _clamp(screen->get_param(screen, PIPE_CAP_MAX_RENDER_TARGETS),
 101               1, MAX_DRAW_BUFFERS);
 102
 103    c->MaxLineWidth
 104       = _maxf(1.0f, screen->get_paramf(screen, PIPE_CAP_MAX_LINE_WIDTH));
 105    c->MaxLineWidthAA
 106       = _maxf(1.0f, screen->get_paramf(screen, PIPE_CAP_MAX_LINE_WIDTH_AA));
 107
 108    c->MaxPointSize
 109       = _maxf(1.0f, screen->get_paramf(screen, PIPE_CAP_MAX_POINT_WIDTH));
 110    c->MaxPointSizeAA
 111       = _maxf(1.0f, screen->get_paramf(screen, PIPE_CAP_MAX_POINT_WIDTH_AA));
 112
 113    c->MaxTextureMaxAnisotropy
 114       = _maxf(2.0f, screen->get_paramf(screen, PIPE_CAP_MAX_TEXTURE_ANISOTROPY));
 115
 116    c->MaxTextureLodBias
 117       = screen->get_paramf(screen, PIPE_CAP_MAX_TEXTURE_LOD_BIAS);
 118
 119    c->MaxDrawBuffers
 120       = CLAMP(screen->get_param(screen, PIPE_CAP_MAX_RENDER_TARGETS),
 121               1, MAX_DRAW_BUFFERS);
 122
 123    /* Is TGSI_OPCODE_CONT supported? */
 124    /* XXX separate query for early function return? */
 125    st->ctx->Shader.EmitContReturn =
 126       screen->get_param(screen, PIPE_CAP_TGSI_CONT_SUPPORTED);
 127 }
 128
 129
 130 /**
 131  * Use pipe_screen::get_param() to query PIPE_CAP_ values to determine
 132  * which GL extensions are supported.
 133  * Quite a few extensions are always supported because they are standard
 134  * features or can be built on top of other gallium features.
 135  * Some fine tuning may still be needed.
 136  */
 137 void st_init_extensions(struct st_context *st)
 138 {
 139    struct pipe_screen *screen = st->pipe->screen;
 140    GLcontext *ctx = st->ctx;
 141
 142    /*
 143     * Extensions that are supported by all Gallium drivers:
 144     */
 145    ctx->Extensions.ARB_copy_buffer = GL_TRUE;
 146    ctx->Extensions.ARB_fragment_program = GL_TRUE;
 147    ctx->Extensions.ARB_map_buffer_range = GL_TRUE;
 148    ctx->Extensions.ARB_multisample = GL_TRUE;
 149    ctx->Extensions.ARB_texture_border_clamp = GL_TRUE; /* XXX temp */
 150    ctx->Extensions.ARB_texture_compression = GL_TRUE;
 151    ctx->Extensions.ARB_texture_cube_map = GL_TRUE;
 152    ctx->Extensions.ARB_texture_env_combine = GL_TRUE;
 153    ctx->Extensions.ARB_texture_env_crossbar = GL_TRUE;
 154    ctx->Extensions.ARB_texture_env_dot3 = GL_TRUE;
 155    ctx->Extensions.ARB_vertex_array_object = GL_TRUE;
 156    ctx->Extensions.ARB_vertex_buffer_object = GL_TRUE;
 157    ctx->Extensions.ARB_vertex_program = GL_TRUE;
 158
 159    ctx->Extensions.EXT_blend_color = GL_TRUE;
 160    ctx->Extensions.EXT_blend_func_separate = GL_TRUE;
 161    ctx->Extensions.EXT_blend_logic_op = GL_TRUE;
 162    ctx->Extensions.EXT_blend_minmax = GL_TRUE;
 163    ctx->Extensions.EXT_blend_subtract = GL_TRUE;
 164    ctx->Extensions.EXT_framebuffer_blit = GL_TRUE;
 165    ctx->Extensions.EXT_framebuffer_object = GL_TRUE;
 166    ctx->Extensions.EXT_fog_coord = GL_TRUE;
 167    ctx->Extensions.EXT_multi_draw_arrays = GL_TRUE;
 168    ctx->Extensions.EXT_pixel_buffer_object = GL_TRUE;
 169    ctx->Extensions.EXT_point_parameters = GL_TRUE;
 170    ctx->Extensions.EXT_provoking_vertex = GL_TRUE;
 171    ctx->Extensions.EXT_secondary_color = GL_TRUE;
 172    ctx->Extensions.EXT_stencil_wrap = GL_TRUE;
 173    ctx->Extensions.EXT_texture_env_add = GL_TRUE;
 174    ctx->Extensions.EXT_texture_env_combine = GL_TRUE;
 175    ctx->Extensions.EXT_texture_env_dot3 = GL_TRUE;
 176    ctx->Extensions.EXT_texture_lod_bias = GL_TRUE;
 177    ctx->Extensions.EXT_vertex_array_bgra = GL_TRUE;
 178
 179    ctx->Extensions.APPLE_vertex_array_object = GL_TRUE;
 180
 181    ctx->Extensions.NV_blend_square = GL_TRUE;
 182    ctx->Extensions.NV_texgen_reflection = GL_TRUE;
 183    ctx->Extensions.NV_texture_env_combine4 = GL_TRUE;
 184
 185    ctx->Extensions.SGI_color_matrix = GL_TRUE;
 186    ctx->Extensions.SGIS_generate_mipmap = GL_TRUE;
 187
 188    /*
 189     * Extensions that depend on the driver/hardware:
 190     */
 191    if (screen->get_param(screen, PIPE_CAP_MAX_RENDER_TARGETS) > 0) {
 192       ctx->Extensions.ARB_draw_buffers = GL_TRUE;
 193    }
 194
 195    if (screen->get_param(screen, PIPE_CAP_GLSL)) {
 196       ctx->Extensions.ARB_fragment_shader = GL_TRUE;
 197       ctx->Extensions.ARB_vertex_shader = GL_TRUE;
 198       ctx->Extensions.ARB_shader_objects = GL_TRUE;
 199       ctx->Extensions.ARB_shading_language_100 = GL_TRUE;
 200       ctx->Extensions.ARB_shading_language_120 = GL_TRUE;
 201    }
 202
 203    if (screen->get_param(screen, PIPE_CAP_TEXTURE_MIRROR_REPEAT) > 0) {
 204       ctx->Extensions.ARB_texture_mirrored_repeat = GL_TRUE;
 205    }
 206
 207    if (screen->get_param(screen, PIPE_CAP_BLEND_EQUATION_SEPARATE)) {
 208       ctx->Extensions.EXT_blend_equation_separate = GL_TRUE;
 209    }
 210
 211    if (screen->get_param(screen, PIPE_CAP_TEXTURE_MIRROR_CLAMP) > 0) {
 212       ctx->Extensions.EXT_texture_mirror_clamp = GL_TRUE;
 213    }
 214
 215    if (screen->get_param(screen, PIPE_CAP_NPOT_TEXTURES)) {
 216       ctx->Extensions.ARB_texture_non_power_of_two = GL_TRUE;
 217       ctx->Extensions.NV_texture_rectangle = GL_TRUE;
 218    }
 219
 220    if (screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_IMAGE_UNITS) > 1) {
 221       ctx->Extensions.ARB_multitexture = GL_TRUE;
 222    }
 223
 224    if (screen->get_param(screen, PIPE_CAP_TWO_SIDED_STENCIL)) {
 225       ctx->Extensions.ATI_separate_stencil = GL_TRUE;
 226       ctx->Extensions.EXT_stencil_two_side = GL_TRUE;
 227    }
 228
 229    if (screen->get_param(screen, PIPE_CAP_ANISOTROPIC_FILTER)) {
 230       ctx->Extensions.EXT_texture_filter_anisotropic = GL_TRUE;
 231    }
 232
 233    if (screen->get_param(screen, PIPE_CAP_POINT_SPRITE)) {
 234       ctx->Extensions.ARB_point_sprite = GL_TRUE;
 235       /* GL_NV_point_sprite is not supported by gallium because we don't
 236        * support the GL_POINT_SPRITE_R_MODE_NV option.
 237        */
 238    }
 239
 240    if (screen->get_param(screen, PIPE_CAP_OCCLUSION_QUERY)) {
 241       ctx->Extensions.ARB_occlusion_query = GL_TRUE;
 242    }
 243
 244    if (screen->get_param(screen, PIPE_CAP_TEXTURE_SHADOW_MAP)) {
 245       ctx->Extensions.ARB_depth_texture = GL_TRUE;
 246       ctx->Extensions.ARB_shadow = GL_TRUE;
 247       ctx->Extensions.EXT_shadow_funcs = GL_TRUE;
 248       /*ctx->Extensions.ARB_shadow_ambient = GL_TRUE;*/
 249    }
 250
 251    /* GL_EXT_packed_depth_stencil requires both the ability to render to
 252     * a depth/stencil buffer and texture from depth/stencil source.
 253     */
 254    if (screen->is_format_supported(screen, PIPE_FORMAT_Z24S8_UNORM,
 255                                    PIPE_TEXTURE_2D,
 256                                    PIPE_TEXTURE_USAGE_DEPTH_STENCIL, 0) &&
 257        screen->is_format_supported(screen, PIPE_FORMAT_Z24S8_UNORM,
 258                                    PIPE_TEXTURE_2D,
 259                                    PIPE_TEXTURE_USAGE_SAMPLER, 0)) {
 260       ctx->Extensions.EXT_packed_depth_stencil = GL_TRUE;
 261    }
 262    else if (screen->is_format_supported(screen, PIPE_FORMAT_S8Z24_UNORM,
 263                                         PIPE_TEXTURE_2D,
 264                                         PIPE_TEXTURE_USAGE_DEPTH_STENCIL, 0) &&
 265             screen->is_format_supported(screen, PIPE_FORMAT_S8Z24_UNORM,
 266                                         PIPE_TEXTURE_2D,
 267                                         PIPE_TEXTURE_USAGE_SAMPLER, 0)) {
 268       ctx->Extensions.EXT_packed_depth_stencil = GL_TRUE;
 269    }
 270
 271    /* sRGB support */
 272    if (screen->is_format_supported(screen, PIPE_FORMAT_R8G8B8A8_SRGB,
 273                                    PIPE_TEXTURE_2D,
 274                                    PIPE_TEXTURE_USAGE_SAMPLER, 0) ||
 275       screen->is_format_supported(screen, PIPE_FORMAT_A8R8G8B8_SRGB,
 276                                    PIPE_TEXTURE_2D,
 277                                    PIPE_TEXTURE_USAGE_SAMPLER, 0)) {
 278       ctx->Extensions.EXT_texture_sRGB = GL_TRUE;
 279    }
 280
 281    /* s3tc support */
 282    if (screen->is_format_supported(screen, PIPE_FORMAT_DXT5_RGBA,
 283                                    PIPE_TEXTURE_2D,
 284                                    PIPE_TEXTURE_USAGE_SAMPLER, 0)) {
 285       ctx->Extensions.EXT_texture_compression_s3tc = GL_TRUE;
 286       ctx->Extensions.S3_s3tc = GL_TRUE;
 287    }
 288
 289    /* ycbcr support */
 290    if (screen->is_format_supported(screen, PIPE_FORMAT_YCBCR,
 291                                    PIPE_TEXTURE_2D,
 292                                    PIPE_TEXTURE_USAGE_SAMPLER, 0) ||
 293        screen->is_format_supported(screen, PIPE_FORMAT_YCBCR_REV,
 294                                    PIPE_TEXTURE_2D,
 295                                    PIPE_TEXTURE_USAGE_SAMPLER, 0)) {
 296       ctx->Extensions.MESA_ycbcr_texture = GL_TRUE;
 297    }
 298
 299    /* GL_ARB_framebuffer_object */
 300    if (ctx->Extensions.EXT_packed_depth_stencil) {
 301       /* we support always support GL_EXT_framebuffer_blit */
 302       ctx->Extensions.ARB_framebuffer_object = GL_TRUE;
 303    }
 304 }