st_extensions.c 12.2 KB
Newer Older
1 2 3
/**************************************************************************
 * 
 * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
4
 * Copyright (c) 2008 VMware, Inc.
5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34
 * All Rights Reserved.
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sub license, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 * 
 * The above copyright notice and this permission notice (including the
 * next paragraph) shall be included in all copies or substantial portions
 * of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 * 
 **************************************************************************/

#include "main/imports.h"
#include "main/context.h"
#include "main/macros.h"

#include "pipe/p_context.h"
#include "pipe/p_defines.h"
35
#include "pipe/p_screen.h"
36 37 38 39 40

#include "st_context.h"
#include "st_extensions.h"


41
static int _min(int a, int b)
42 43 44 45
{
   return (a < b) ? a : b;
}

46
static float _maxf(float a, float b)
47 48 49 50
{
   return (a > b) ? a : b;
}

51
static int _clamp(int a, int min, int max)
52
{
53 54 55 56 57 58
   if (a < min)
      return min;
   else if (a > max)
      return max;
   else
      return a;
59 60 61
}


62 63 64 65
/**
 * Query driver to get implementation limits.
 * Note that we have to limit/clamp against Mesa's internal limits too.
 */
66 67
void st_init_limits(struct st_context *st)
{
68
   struct pipe_screen *screen = st->pipe->screen;
69 70 71
   struct gl_constants *c = &st->ctx->Const;

   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 92
      = _min(screen->get_param(screen, PIPE_CAP_MAX_VERTEX_TEXTURE_UNITS),
             MAX_VERTEX_TEXTURE_IMAGE_UNITS);
93

94 95 96 97
   c->MaxCombinedTextureImageUnits
      = _min(screen->get_param(screen, PIPE_CAP_MAX_COMBINED_SAMPLERS),
             MAX_COMBINED_TEXTURE_IMAGE_UNITS);

98 99
   c->MaxTextureCoordUnits
      = _min(c->MaxTextureImageUnits, MAX_TEXTURE_COORD_UNITS);
100

101
   c->MaxTextureUnits = _min(c->MaxTextureImageUnits, c->MaxTextureCoordUnits);
102

103
   c->MaxDrawBuffers
104
      = _clamp(screen->get_param(screen, PIPE_CAP_MAX_RENDER_TARGETS),
105
              1, MAX_DRAW_BUFFERS);
106 107

   c->MaxLineWidth
108
      = _maxf(1.0f, screen->get_paramf(screen, PIPE_CAP_MAX_LINE_WIDTH));
109
   c->MaxLineWidthAA
110
      = _maxf(1.0f, screen->get_paramf(screen, PIPE_CAP_MAX_LINE_WIDTH_AA));
111 112

   c->MaxPointSize
113
      = _maxf(1.0f, screen->get_paramf(screen, PIPE_CAP_MAX_POINT_WIDTH));
114
   c->MaxPointSizeAA
115
      = _maxf(1.0f, screen->get_paramf(screen, PIPE_CAP_MAX_POINT_WIDTH_AA));
116 117 118 119
   /* called after _mesa_create_context/_mesa_init_point, fix default user
    * settable max point size up
    */
   st->ctx->Point.MaxSize = MAX2(c->MaxPointSize, c->MaxPointSizeAA);
120 121 122 123 124
   /* these are not queryable. Note that GL basically mandates a 1.0 minimum
    * for non-aa sizes, but we can go down to 0.0 for aa points.
    */
   c->MinPointSize = 1.0f;
   c->MinPointSizeAA = 0.0f;
125 126

   c->MaxTextureMaxAnisotropy
127
      = _maxf(2.0f, screen->get_paramf(screen, PIPE_CAP_MAX_TEXTURE_ANISOTROPY));
128 129

   c->MaxTextureLodBias
130
      = screen->get_paramf(screen, PIPE_CAP_MAX_TEXTURE_LOD_BIAS);
131

Brian's avatar
Brian committed
132 133 134
   c->MaxDrawBuffers
      = CLAMP(screen->get_param(screen, PIPE_CAP_MAX_RENDER_TARGETS),
              1, MAX_DRAW_BUFFERS);
135 136 137 138 139

   /* Is TGSI_OPCODE_CONT supported? */
   /* XXX separate query for early function return? */
   st->ctx->Shader.EmitContReturn =
      screen->get_param(screen, PIPE_CAP_TGSI_CONT_SUPPORTED);
140 141 142 143
}


/**
144 145 146 147 148
 * Use pipe_screen::get_param() to query PIPE_CAP_ values to determine
 * which GL extensions are supported.
 * Quite a few extensions are always supported because they are standard
 * features or can be built on top of other gallium features.
 * Some fine tuning may still be needed.
149 150 151
 */
void st_init_extensions(struct st_context *st)
{
152
   struct pipe_screen *screen = st->pipe->screen;
153 154 155 156 157
   GLcontext *ctx = st->ctx;

   /*
    * Extensions that are supported by all Gallium drivers:
    */
158
   ctx->Extensions.ARB_copy_buffer = GL_TRUE;
159
   ctx->Extensions.ARB_fragment_coord_conventions = GL_TRUE;
Brian Paul's avatar
Brian Paul committed
160
   ctx->Extensions.ARB_fragment_program = GL_TRUE;
161
   ctx->Extensions.ARB_map_buffer_range = GL_TRUE;
162
   ctx->Extensions.ARB_multisample = GL_TRUE;
163
   ctx->Extensions.ARB_texture_border_clamp = GL_TRUE; /* XXX temp */
164
   ctx->Extensions.ARB_texture_compression = GL_TRUE;
165 166 167 168
   ctx->Extensions.ARB_texture_cube_map = GL_TRUE;
   ctx->Extensions.ARB_texture_env_combine = GL_TRUE;
   ctx->Extensions.ARB_texture_env_crossbar = GL_TRUE;
   ctx->Extensions.ARB_texture_env_dot3 = GL_TRUE;
169
   ctx->Extensions.ARB_vertex_array_object = GL_TRUE;
170
   ctx->Extensions.ARB_vertex_buffer_object = GL_TRUE;
Brian Paul's avatar
Brian Paul committed
171
   ctx->Extensions.ARB_vertex_program = GL_TRUE;
172 173 174 175 176 177

   ctx->Extensions.EXT_blend_color = GL_TRUE;
   ctx->Extensions.EXT_blend_func_separate = GL_TRUE;
   ctx->Extensions.EXT_blend_logic_op = GL_TRUE;
   ctx->Extensions.EXT_blend_minmax = GL_TRUE;
   ctx->Extensions.EXT_blend_subtract = GL_TRUE;
178
   ctx->Extensions.EXT_framebuffer_blit = GL_TRUE;
179
   ctx->Extensions.EXT_framebuffer_object = GL_TRUE;
180
   ctx->Extensions.EXT_framebuffer_multisample = GL_TRUE;
181 182 183 184
   ctx->Extensions.EXT_fog_coord = GL_TRUE;
   ctx->Extensions.EXT_multi_draw_arrays = GL_TRUE;
   ctx->Extensions.EXT_pixel_buffer_object = GL_TRUE;
   ctx->Extensions.EXT_point_parameters = GL_TRUE;
185
   ctx->Extensions.EXT_provoking_vertex = GL_TRUE;
186 187 188 189 190 191
   ctx->Extensions.EXT_secondary_color = GL_TRUE;
   ctx->Extensions.EXT_stencil_wrap = GL_TRUE;
   ctx->Extensions.EXT_texture_env_add = GL_TRUE;
   ctx->Extensions.EXT_texture_env_combine = GL_TRUE;
   ctx->Extensions.EXT_texture_env_dot3 = GL_TRUE;
   ctx->Extensions.EXT_texture_lod_bias = GL_TRUE;
192
   ctx->Extensions.EXT_vertex_array_bgra = GL_TRUE;
193

194 195
   ctx->Extensions.APPLE_vertex_array_object = GL_TRUE;

196 197
   ctx->Extensions.NV_blend_square = GL_TRUE;
   ctx->Extensions.NV_texgen_reflection = GL_TRUE;
198
   ctx->Extensions.NV_texture_env_combine4 = GL_TRUE;
199

200 201 202 203
#if FEATURE_OES_draw_texture
   ctx->Extensions.OES_draw_texture = GL_TRUE;
#endif

204
   ctx->Extensions.SGI_color_matrix = GL_TRUE;
205
   ctx->Extensions.SGIS_generate_mipmap = GL_TRUE;
206 207 208 209

   /*
    * Extensions that depend on the driver/hardware:
    */
210
   if (screen->get_param(screen, PIPE_CAP_MAX_RENDER_TARGETS) > 0) {
211 212 213
      ctx->Extensions.ARB_draw_buffers = GL_TRUE;
   }

214
   if (screen->get_param(screen, PIPE_CAP_GLSL)) {
215 216 217 218 219 220 221
      ctx->Extensions.ARB_fragment_shader = GL_TRUE;
      ctx->Extensions.ARB_vertex_shader = GL_TRUE;
      ctx->Extensions.ARB_shader_objects = GL_TRUE;
      ctx->Extensions.ARB_shading_language_100 = GL_TRUE;
      ctx->Extensions.ARB_shading_language_120 = GL_TRUE;
   }

222 223 224 225
   if (screen->get_param(screen, PIPE_CAP_TEXTURE_MIRROR_REPEAT) > 0) {
      ctx->Extensions.ARB_texture_mirrored_repeat = GL_TRUE;
   }

226 227 228 229
   if (screen->get_param(screen, PIPE_CAP_BLEND_EQUATION_SEPARATE)) {
      ctx->Extensions.EXT_blend_equation_separate = GL_TRUE;
   }

230 231 232 233
   if (screen->get_param(screen, PIPE_CAP_TEXTURE_MIRROR_CLAMP) > 0) {
      ctx->Extensions.EXT_texture_mirror_clamp = GL_TRUE;
   }

234
   if (screen->get_param(screen, PIPE_CAP_NPOT_TEXTURES)) {
235 236 237 238
      ctx->Extensions.ARB_texture_non_power_of_two = GL_TRUE;
      ctx->Extensions.NV_texture_rectangle = GL_TRUE;
   }

239
   if (screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_IMAGE_UNITS) > 1) {
240 241 242
      ctx->Extensions.ARB_multitexture = GL_TRUE;
   }

243
   if (screen->get_param(screen, PIPE_CAP_TWO_SIDED_STENCIL)) {
244
      ctx->Extensions.ATI_separate_stencil = GL_TRUE;
245
      ctx->Extensions.EXT_stencil_two_side = GL_TRUE;
246 247
   }

248
   if (screen->get_param(screen, PIPE_CAP_ANISOTROPIC_FILTER)) {
249 250 251
      ctx->Extensions.EXT_texture_filter_anisotropic = GL_TRUE;
   }

252
   if (screen->get_param(screen, PIPE_CAP_POINT_SPRITE)) {
253
      ctx->Extensions.ARB_point_sprite = GL_TRUE;
254 255 256
      /* GL_NV_point_sprite is not supported by gallium because we don't
       * support the GL_POINT_SPRITE_R_MODE_NV option.
       */
257 258
   }

259
   if (screen->get_param(screen, PIPE_CAP_OCCLUSION_QUERY)) {
260 261 262
      ctx->Extensions.ARB_occlusion_query = GL_TRUE;
   }

263
   if (screen->get_param(screen, PIPE_CAP_TEXTURE_SHADOW_MAP)) {
264 265
      ctx->Extensions.ARB_depth_texture = GL_TRUE;
      ctx->Extensions.ARB_shadow = GL_TRUE;
Brian's avatar
Brian committed
266
      ctx->Extensions.EXT_shadow_funcs = GL_TRUE;
267 268 269
      /*ctx->Extensions.ARB_shadow_ambient = GL_TRUE;*/
   }

270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289
   /* GL_EXT_packed_depth_stencil requires both the ability to render to
    * a depth/stencil buffer and texture from depth/stencil source.
    */
   if (screen->is_format_supported(screen, PIPE_FORMAT_Z24S8_UNORM,
                                   PIPE_TEXTURE_2D, 
                                   PIPE_TEXTURE_USAGE_DEPTH_STENCIL, 0) &&
       screen->is_format_supported(screen, PIPE_FORMAT_Z24S8_UNORM,
                                   PIPE_TEXTURE_2D, 
                                   PIPE_TEXTURE_USAGE_SAMPLER, 0)) {
      ctx->Extensions.EXT_packed_depth_stencil = GL_TRUE;
   }
   else if (screen->is_format_supported(screen, PIPE_FORMAT_S8Z24_UNORM,
                                        PIPE_TEXTURE_2D, 
                                        PIPE_TEXTURE_USAGE_DEPTH_STENCIL, 0) &&
            screen->is_format_supported(screen, PIPE_FORMAT_S8Z24_UNORM,
                                        PIPE_TEXTURE_2D, 
                                        PIPE_TEXTURE_USAGE_SAMPLER, 0)) {
      ctx->Extensions.EXT_packed_depth_stencil = GL_TRUE;
   }

290
   /* sRGB support */
291
   if (screen->is_format_supported(screen, PIPE_FORMAT_R8G8B8A8_SRGB,
292 293 294
                                   PIPE_TEXTURE_2D, 
                                   PIPE_TEXTURE_USAGE_SAMPLER, 0) ||
      screen->is_format_supported(screen, PIPE_FORMAT_A8R8G8B8_SRGB,
295 296
                                   PIPE_TEXTURE_2D, 
                                   PIPE_TEXTURE_USAGE_SAMPLER, 0)) {
297 298
      ctx->Extensions.EXT_texture_sRGB = GL_TRUE;
   }
299

300
   /* s3tc support */
301
   if (screen->is_format_supported(screen, PIPE_FORMAT_DXT5_RGBA,
302 303
                                   PIPE_TEXTURE_2D, 
                                   PIPE_TEXTURE_USAGE_SAMPLER, 0)) {
304
      ctx->Extensions.EXT_texture_compression_s3tc = GL_TRUE;
Jose Fonseca's avatar
Jose Fonseca committed
305
      ctx->Extensions.S3_s3tc = GL_TRUE;
306
   }
307 308

   /* ycbcr support */
309 310 311 312 313 314
   if (screen->is_format_supported(screen, PIPE_FORMAT_YCBCR, 
                                   PIPE_TEXTURE_2D, 
                                   PIPE_TEXTURE_USAGE_SAMPLER, 0) ||
       screen->is_format_supported(screen, PIPE_FORMAT_YCBCR_REV, 
                                   PIPE_TEXTURE_2D, 
                                   PIPE_TEXTURE_USAGE_SAMPLER, 0)) {
315 316
      ctx->Extensions.MESA_ycbcr_texture = GL_TRUE;
   }
317 318 319 320 321 322

   /* GL_ARB_framebuffer_object */
   if (ctx->Extensions.EXT_packed_depth_stencil) {
      /* we support always support GL_EXT_framebuffer_blit */
      ctx->Extensions.ARB_framebuffer_object = GL_TRUE;
   }
323 324 325 326

   if (st->pipe->render_condition) {
      ctx->Extensions.NV_conditional_render = GL_TRUE;
   }
327 328 329 330 331 332 333 334 335 336

   if (screen->get_param(screen, PIPE_CAP_INDEP_BLEND_ENABLE)) {
      ctx->Extensions.EXT_draw_buffers2 = GL_TRUE;
   }

#if 0 /* not yet */
   if (screen->get_param(screen, PIPE_CAP_INDEP_BLEND_FUNC)) {
      ctx->Extensions.ARB_draw_buffers_blend = GL_TRUE;
   }
#endif
337
}