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