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/extensions.h"
  32 #include "main/macros.h"
  33
  34 #include "pipe/p_context.h"
  35 #include "pipe/p_defines.h"
  36 #include "pipe/p_screen.h"
  37
  38 #include "st_context.h"
  39 #include "st_extensions.h"
  40
  41
  42 static int _min(int a, int b)
  43 {
  44    return (a < b) ? a : b;
  45 }
  46
  47 static float _maxf(float a, float b)
  48 {
  49    return (a > b) ? a : b;
  50 }
  51
  52 static int _clamp(int a, int min, int max)
  53 {
  54    if (a < min)
  55       return min;
  56    else if (a > max)
  57       return max;
  58    else
  59       return a;
  60 }
  61
  62
  63 /**
  64  * Query driver to get implementation limits.
  65  * Note that we have to limit/clamp against Mesa's internal limits too.
  66  */
  67 void st_init_limits(struct st_context *st)
  68 {
  69    struct pipe_screen *screen = st->pipe->screen;
  70    struct gl_constants *c = &st->ctx->Const;
  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->MaxTextureUnits
  88       = c->MaxTextureImageUnits
  89       = c->MaxTextureCoordUnits
  90       = _min(screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_IMAGE_UNITS),
  91             MAX_TEXTURE_IMAGE_UNITS);
  92
  93    c->MaxVertexTextureImageUnits
  94       = screen->get_param(screen, PIPE_CAP_MAX_VERTEX_TEXTURE_UNITS);
  95
  96    c->MaxDrawBuffers
  97       = _clamp(screen->get_param(screen, PIPE_CAP_MAX_RENDER_TARGETS),
  98               1, MAX_DRAW_BUFFERS);
  99
 100    c->MaxLineWidth
 101       = _maxf(1.0f, screen->get_paramf(screen, PIPE_CAP_MAX_LINE_WIDTH));
 102    c->MaxLineWidthAA
 103       = _maxf(1.0f, screen->get_paramf(screen, PIPE_CAP_MAX_LINE_WIDTH_AA));
 104
 105    c->MaxPointSize
 106       = _maxf(1.0f, screen->get_paramf(screen, PIPE_CAP_MAX_POINT_WIDTH));
 107    c->MaxPointSizeAA
 108       = _maxf(1.0f, screen->get_paramf(screen, PIPE_CAP_MAX_POINT_WIDTH_AA));
 109
 110    c->MaxTextureMaxAnisotropy
 111       = _maxf(2.0f, screen->get_paramf(screen, PIPE_CAP_MAX_TEXTURE_ANISOTROPY));
 112
 113    c->MaxTextureLodBias
 114       = screen->get_paramf(screen, PIPE_CAP_MAX_TEXTURE_LOD_BIAS);
 115
 116    c->MaxDrawBuffers
 117       = CLAMP(screen->get_param(screen, PIPE_CAP_MAX_RENDER_TARGETS),
 118               1, MAX_DRAW_BUFFERS);
 119 }
 120
 121
 122 /**
 123  * XXX this needs careful review
 124  */
 125 void st_init_extensions(struct st_context *st)
 126 {
 127    struct pipe_screen *screen = st->pipe->screen;
 128    GLcontext *ctx = st->ctx;
 129
 130    /*
 131     * Extensions that are supported by all Gallium drivers:
 132     */
 133    ctx->Extensions.ARB_multisample = GL_TRUE; /* API support */
 134    ctx->Extensions.ARB_fragment_program = GL_TRUE;
 135    ctx->Extensions.ARB_texture_border_clamp = GL_TRUE; /* XXX temp */
 136    ctx->Extensions.ARB_texture_compression = GL_TRUE; /* API support only */
 137    ctx->Extensions.ARB_texture_cube_map = GL_TRUE;
 138    ctx->Extensions.ARB_texture_env_combine = GL_TRUE;
 139    ctx->Extensions.ARB_texture_env_crossbar = GL_TRUE;
 140    ctx->Extensions.ARB_texture_env_dot3 = GL_TRUE;
 141    ctx->Extensions.ARB_vertex_program = GL_TRUE;
 142    ctx->Extensions.ARB_vertex_buffer_object = GL_TRUE;
 143
 144    ctx->Extensions.EXT_blend_color = GL_TRUE;
 145    ctx->Extensions.EXT_blend_equation_separate = GL_TRUE;
 146    ctx->Extensions.EXT_blend_func_separate = GL_TRUE;
 147    ctx->Extensions.EXT_blend_logic_op = GL_TRUE;
 148    ctx->Extensions.EXT_blend_minmax = GL_TRUE;
 149    ctx->Extensions.EXT_blend_subtract = GL_TRUE;
 150    ctx->Extensions.EXT_framebuffer_blit = GL_TRUE;
 151    ctx->Extensions.EXT_framebuffer_object = GL_TRUE;
 152    ctx->Extensions.EXT_fog_coord = GL_TRUE;
 153    ctx->Extensions.EXT_multi_draw_arrays = GL_TRUE;
 154    ctx->Extensions.EXT_pixel_buffer_object = GL_TRUE;
 155    ctx->Extensions.EXT_point_parameters = GL_TRUE;
 156    ctx->Extensions.EXT_secondary_color = GL_TRUE;
 157    ctx->Extensions.EXT_stencil_wrap = GL_TRUE;
 158    ctx->Extensions.EXT_texture_env_add = GL_TRUE;
 159    ctx->Extensions.EXT_texture_env_combine = GL_TRUE;
 160    ctx->Extensions.EXT_texture_env_dot3 = GL_TRUE;
 161    ctx->Extensions.EXT_texture_lod_bias = GL_TRUE;
 162
 163    ctx->Extensions.NV_blend_square = GL_TRUE;
 164    ctx->Extensions.NV_texgen_reflection = GL_TRUE;
 165
 166    ctx->Extensions.SGI_color_matrix = GL_TRUE;
 167    ctx->Extensions.SGIS_generate_mipmap = GL_TRUE; /* XXX temp */
 168
 169    /*
 170     * Extensions that depend on the driver/hardware:
 171     */
 172    if (screen->get_param(screen, PIPE_CAP_MAX_RENDER_TARGETS) > 0) {
 173       ctx->Extensions.ARB_draw_buffers = GL_TRUE;
 174    }
 175
 176    if (screen->get_param(screen, PIPE_CAP_GLSL)) {
 177       ctx->Extensions.ARB_fragment_shader = GL_TRUE;
 178       ctx->Extensions.ARB_vertex_shader = GL_TRUE;
 179       ctx->Extensions.ARB_shader_objects = GL_TRUE;
 180       ctx->Extensions.ARB_shading_language_100 = GL_TRUE;
 181       ctx->Extensions.ARB_shading_language_120 = GL_TRUE;
 182    }
 183
 184    if (screen->get_param(screen, PIPE_CAP_TEXTURE_MIRROR_REPEAT) > 0) {
 185       ctx->Extensions.ARB_texture_mirrored_repeat = GL_TRUE;
 186    }
 187
 188    if (screen->get_param(screen, PIPE_CAP_TEXTURE_MIRROR_CLAMP) > 0) {
 189       ctx->Extensions.EXT_texture_mirror_clamp = GL_TRUE;
 190    }
 191
 192    if (screen->get_param(screen, PIPE_CAP_NPOT_TEXTURES)) {
 193       ctx->Extensions.ARB_texture_non_power_of_two = GL_TRUE;
 194       ctx->Extensions.NV_texture_rectangle = GL_TRUE;
 195    }
 196
 197    if (screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_IMAGE_UNITS) > 1) {
 198       ctx->Extensions.ARB_multitexture = GL_TRUE;
 199    }
 200
 201    if (screen->get_param(screen, PIPE_CAP_TWO_SIDED_STENCIL)) {
 202       ctx->Extensions.ATI_separate_stencil = GL_TRUE;
 203    }
 204
 205    if (screen->get_param(screen, PIPE_CAP_ANISOTROPIC_FILTER)) {
 206       ctx->Extensions.EXT_texture_filter_anisotropic = GL_TRUE;
 207    }
 208
 209    if (screen->get_param(screen, PIPE_CAP_POINT_SPRITE)) {
 210       ctx->Extensions.ARB_point_sprite = GL_TRUE;
 211       ctx->Extensions.NV_point_sprite = GL_TRUE;
 212    }
 213
 214    if (screen->get_param(screen, PIPE_CAP_OCCLUSION_QUERY)) {
 215       ctx->Extensions.ARB_occlusion_query = GL_TRUE;
 216    }
 217
 218    if (screen->get_param(screen, PIPE_CAP_TEXTURE_SHADOW_MAP)) {
 219       ctx->Extensions.ARB_depth_texture = GL_TRUE;
 220       ctx->Extensions.ARB_shadow = GL_TRUE;
 221       ctx->Extensions.EXT_shadow_funcs = GL_TRUE;
 222       /*ctx->Extensions.ARB_shadow_ambient = GL_TRUE;*/
 223    }
 224
 225    /* GL_EXT_packed_depth_stencil requires both the ability to render to
 226     * a depth/stencil buffer and texture from depth/stencil source.
 227     */
 228    if (screen->is_format_supported(screen, PIPE_FORMAT_Z24S8_UNORM,
 229                                    PIPE_TEXTURE_2D,
 230                                    PIPE_TEXTURE_USAGE_DEPTH_STENCIL, 0) &&
 231        screen->is_format_supported(screen, PIPE_FORMAT_Z24S8_UNORM,
 232                                    PIPE_TEXTURE_2D,
 233                                    PIPE_TEXTURE_USAGE_SAMPLER, 0)) {
 234       ctx->Extensions.EXT_packed_depth_stencil = GL_TRUE;
 235    }
 236    else if (screen->is_format_supported(screen, PIPE_FORMAT_S8Z24_UNORM,
 237                                         PIPE_TEXTURE_2D,
 238                                         PIPE_TEXTURE_USAGE_DEPTH_STENCIL, 0) &&
 239             screen->is_format_supported(screen, PIPE_FORMAT_S8Z24_UNORM,
 240                                         PIPE_TEXTURE_2D,
 241                                         PIPE_TEXTURE_USAGE_SAMPLER, 0)) {
 242       ctx->Extensions.EXT_packed_depth_stencil = GL_TRUE;
 243    }
 244
 245    if (screen->is_format_supported(screen, PIPE_FORMAT_R8G8B8A8_SRGB,
 246                                    PIPE_TEXTURE_2D,
 247                                    PIPE_TEXTURE_USAGE_SAMPLER, 0) ||
 248       screen->is_format_supported(screen, PIPE_FORMAT_A8R8G8B8_SRGB,
 249                                    PIPE_TEXTURE_2D,
 250                                    PIPE_TEXTURE_USAGE_SAMPLER, 0)) {
 251       ctx->Extensions.EXT_texture_sRGB = GL_TRUE;
 252    }
 253
 254 #if 01
 255    if (screen->is_format_supported(screen, PIPE_FORMAT_DXT5_RGBA,
 256                                    PIPE_TEXTURE_2D,
 257                                    PIPE_TEXTURE_USAGE_SAMPLER, 0)) {
 258       ctx->Extensions.EXT_texture_compression_s3tc = GL_TRUE;
 259    }
 260 #endif
 261    if (screen->is_format_supported(screen, PIPE_FORMAT_YCBCR,
 262                                    PIPE_TEXTURE_2D,
 263                                    PIPE_TEXTURE_USAGE_SAMPLER, 0) ||
 264        screen->is_format_supported(screen, PIPE_FORMAT_YCBCR_REV,
 265                                    PIPE_TEXTURE_2D,
 266                                    PIPE_TEXTURE_USAGE_SAMPLER, 0)) {
 267       ctx->Extensions.MESA_ycbcr_texture = GL_TRUE;
 268    }
 269
 270 }