1 /**************************************************************************
3 * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
4 * Copyright (c) 2008 VMware, Inc.
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:
15 * The above copyright notice and this permission notice (including the
16 * next paragraph) shall be included in all copies or substantial portions
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.
27 **************************************************************************/
29 #include "main/imports.h"
30 #include "main/context.h"
31 #include "main/macros.h"
32 #include "main/version.h"
34 #include "pipe/p_context.h"
35 #include "pipe/p_defines.h"
36 #include "pipe/p_screen.h"
38 #include "st_context.h"
39 #include "st_extensions.h"
40 #include "st_format.h"
42 static unsigned _min(unsigned a
, unsigned b
)
44 return (a
< b
) ? a
: b
;
47 static float _maxf(float a
, float b
)
49 return (a
> b
) ? a
: b
;
52 static int _clamp(int a
, int min
, int max
)
64 * Query driver to get implementation limits.
65 * Note that we have to limit/clamp against Mesa's internal limits too.
67 void st_init_limits(struct st_context
*st
)
69 struct pipe_screen
*screen
= st
->pipe
->screen
;
70 struct gl_constants
*c
= &st
->ctx
->Const
;
72 boolean can_ubo
= TRUE
;
75 = _min(screen
->get_param(screen
, PIPE_CAP_MAX_TEXTURE_2D_LEVELS
),
79 = _min(screen
->get_param(screen
, PIPE_CAP_MAX_TEXTURE_3D_LEVELS
),
80 MAX_3D_TEXTURE_LEVELS
);
82 c
->MaxCubeTextureLevels
83 = _min(screen
->get_param(screen
, PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS
),
84 MAX_CUBE_TEXTURE_LEVELS
);
87 = _min(1 << (c
->MaxTextureLevels
- 1), MAX_TEXTURE_RECT_SIZE
);
89 c
->MaxArrayTextureLayers
90 = screen
->get_param(screen
, PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS
);
92 c
->MaxCombinedTextureImageUnits
93 = _min(screen
->get_param(screen
, PIPE_CAP_MAX_COMBINED_SAMPLERS
),
94 MAX_COMBINED_TEXTURE_IMAGE_UNITS
);
96 /* Define max viewport size and max renderbuffer size in terms of
97 * max texture size (note: max tex RECT size = max tex 2D size).
98 * If this isn't true for some hardware we'll need new PIPE_CAP_ queries.
100 c
->MaxViewportWidth
=
101 c
->MaxViewportHeight
=
102 c
->MaxRenderbufferSize
= c
->MaxTextureRectSize
;
104 c
->MaxDrawBuffers
= c
->MaxColorAttachments
=
105 _clamp(screen
->get_param(screen
, PIPE_CAP_MAX_RENDER_TARGETS
),
106 1, MAX_DRAW_BUFFERS
);
108 c
->MaxDualSourceDrawBuffers
109 = _clamp(screen
->get_param(screen
, PIPE_CAP_MAX_DUAL_SOURCE_RENDER_TARGETS
),
110 0, MAX_DRAW_BUFFERS
);
113 = _maxf(1.0f
, screen
->get_paramf(screen
,
114 PIPE_CAPF_MAX_LINE_WIDTH
));
116 = _maxf(1.0f
, screen
->get_paramf(screen
,
117 PIPE_CAPF_MAX_LINE_WIDTH_AA
));
120 = _maxf(1.0f
, screen
->get_paramf(screen
,
121 PIPE_CAPF_MAX_POINT_WIDTH
));
123 = _maxf(1.0f
, screen
->get_paramf(screen
,
124 PIPE_CAPF_MAX_POINT_WIDTH_AA
));
125 /* called after _mesa_create_context/_mesa_init_point, fix default user
126 * settable max point size up
128 st
->ctx
->Point
.MaxSize
= MAX2(c
->MaxPointSize
, c
->MaxPointSizeAA
);
129 /* these are not queryable. Note that GL basically mandates a 1.0 minimum
130 * for non-aa sizes, but we can go down to 0.0 for aa points.
132 c
->MinPointSize
= 1.0f
;
133 c
->MinPointSizeAA
= 0.0f
;
135 c
->MaxTextureMaxAnisotropy
136 = _maxf(2.0f
, screen
->get_paramf(screen
,
137 PIPE_CAPF_MAX_TEXTURE_ANISOTROPY
));
140 = screen
->get_paramf(screen
, PIPE_CAPF_MAX_TEXTURE_LOD_BIAS
);
142 c
->QuadsFollowProvokingVertexConvention
= screen
->get_param(
143 screen
, PIPE_CAP_QUADS_FOLLOW_PROVOKING_VERTEX_CONVENTION
);
145 c
->MaxUniformBlockSize
=
146 screen
->get_shader_param(screen
, PIPE_SHADER_FRAGMENT
,
147 PIPE_SHADER_CAP_MAX_CONSTS
) * 16;
148 if (c
->MaxUniformBlockSize
< 16384) {
152 for (sh
= 0; sh
< PIPE_SHADER_TYPES
; ++sh
) {
153 struct gl_shader_compiler_options
*options
;
154 struct gl_program_constants
*pc
;
157 case PIPE_SHADER_FRAGMENT
:
158 pc
= &c
->FragmentProgram
;
159 options
= &st
->ctx
->ShaderCompilerOptions
[MESA_SHADER_FRAGMENT
];
161 case PIPE_SHADER_VERTEX
:
162 pc
= &c
->VertexProgram
;
163 options
= &st
->ctx
->ShaderCompilerOptions
[MESA_SHADER_VERTEX
];
165 case PIPE_SHADER_GEOMETRY
:
166 pc
= &c
->GeometryProgram
;
167 options
= &st
->ctx
->ShaderCompilerOptions
[MESA_SHADER_GEOMETRY
];
170 /* compute shader, etc. */
174 pc
->MaxTextureImageUnits
=
175 _min(screen
->get_shader_param(screen
, sh
,
176 PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS
),
177 MAX_TEXTURE_IMAGE_UNITS
);
179 pc
->MaxInstructions
= pc
->MaxNativeInstructions
=
180 screen
->get_shader_param(screen
, sh
, PIPE_SHADER_CAP_MAX_INSTRUCTIONS
);
181 pc
->MaxAluInstructions
= pc
->MaxNativeAluInstructions
=
182 screen
->get_shader_param(screen
, sh
, PIPE_SHADER_CAP_MAX_ALU_INSTRUCTIONS
);
183 pc
->MaxTexInstructions
= pc
->MaxNativeTexInstructions
=
184 screen
->get_shader_param(screen
, sh
, PIPE_SHADER_CAP_MAX_TEX_INSTRUCTIONS
);
185 pc
->MaxTexIndirections
= pc
->MaxNativeTexIndirections
=
186 screen
->get_shader_param(screen
, sh
, PIPE_SHADER_CAP_MAX_TEX_INDIRECTIONS
);
187 pc
->MaxAttribs
= pc
->MaxNativeAttribs
=
188 screen
->get_shader_param(screen
, sh
, PIPE_SHADER_CAP_MAX_INPUTS
);
189 pc
->MaxTemps
= pc
->MaxNativeTemps
=
190 screen
->get_shader_param(screen
, sh
, PIPE_SHADER_CAP_MAX_TEMPS
);
191 pc
->MaxAddressRegs
= pc
->MaxNativeAddressRegs
=
192 _min(screen
->get_shader_param(screen
, sh
, PIPE_SHADER_CAP_MAX_ADDRS
),
193 MAX_PROGRAM_ADDRESS_REGS
);
194 pc
->MaxParameters
= pc
->MaxNativeParameters
=
195 screen
->get_shader_param(screen
, sh
, PIPE_SHADER_CAP_MAX_CONSTS
);
197 pc
->MaxUniformComponents
= 4 * MIN2(pc
->MaxNativeParameters
, MAX_UNIFORMS
);
199 pc
->MaxUniformBlocks
=
200 screen
->get_shader_param(screen
, sh
, PIPE_SHADER_CAP_MAX_CONST_BUFFERS
);
201 if (pc
->MaxUniformBlocks
)
202 pc
->MaxUniformBlocks
-= 1; /* The first one is for ordinary uniforms. */
203 pc
->MaxUniformBlocks
= _min(pc
->MaxUniformBlocks
, MAX_UNIFORM_BUFFERS
);
205 pc
->MaxCombinedUniformComponents
= (pc
->MaxUniformComponents
+
206 c
->MaxUniformBlockSize
/ 4 *
207 pc
->MaxUniformBlocks
);
209 /* Gallium doesn't really care about local vs. env parameters so use the
212 pc
->MaxLocalParams
= MIN2(pc
->MaxParameters
, MAX_PROGRAM_LOCAL_PARAMS
);
213 pc
->MaxEnvParams
= MIN2(pc
->MaxParameters
, MAX_PROGRAM_ENV_PARAMS
);
215 options
->EmitNoNoise
= TRUE
;
217 /* TODO: make these more fine-grained if anyone needs it */
218 options
->MaxIfDepth
= screen
->get_shader_param(screen
, sh
, PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH
);
219 options
->EmitNoLoops
= !screen
->get_shader_param(screen
, sh
, PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH
);
220 options
->EmitNoFunctions
= !screen
->get_shader_param(screen
, sh
, PIPE_SHADER_CAP_SUBROUTINES
);
221 options
->EmitNoMainReturn
= !screen
->get_shader_param(screen
, sh
, PIPE_SHADER_CAP_SUBROUTINES
);
223 options
->EmitNoCont
= !screen
->get_shader_param(screen
, sh
, PIPE_SHADER_CAP_TGSI_CONT_SUPPORTED
);
225 options
->EmitNoIndirectInput
= !screen
->get_shader_param(screen
, sh
,
226 PIPE_SHADER_CAP_INDIRECT_INPUT_ADDR
);
227 options
->EmitNoIndirectOutput
= !screen
->get_shader_param(screen
, sh
,
228 PIPE_SHADER_CAP_INDIRECT_OUTPUT_ADDR
);
229 options
->EmitNoIndirectTemp
= !screen
->get_shader_param(screen
, sh
,
230 PIPE_SHADER_CAP_INDIRECT_TEMP_ADDR
);
231 options
->EmitNoIndirectUniform
= !screen
->get_shader_param(screen
, sh
,
232 PIPE_SHADER_CAP_INDIRECT_CONST_ADDR
);
234 if (pc
->MaxNativeInstructions
&&
235 (options
->EmitNoIndirectUniform
|| pc
->MaxUniformBlocks
< 12)) {
239 if (options
->EmitNoLoops
)
240 options
->MaxUnrollIterations
= MIN2(screen
->get_shader_param(screen
, sh
, PIPE_SHADER_CAP_MAX_INSTRUCTIONS
), 65536);
242 options
->MaxUnrollIterations
= 255; /* SM3 limit */
243 options
->LowerClipDistance
= true;
246 /* This depends on program constants. */
247 c
->MaxTextureCoordUnits
248 = _min(c
->FragmentProgram
.MaxTextureImageUnits
, MAX_TEXTURE_COORD_UNITS
);
250 c
->MaxTextureUnits
= _min(c
->FragmentProgram
.MaxTextureImageUnits
, c
->MaxTextureCoordUnits
);
252 c
->VertexProgram
.MaxAttribs
= MIN2(c
->VertexProgram
.MaxAttribs
, 16);
254 /* PIPE_SHADER_CAP_MAX_INPUTS for the FS specifies the maximum number
255 * of inputs. It's always 2 colors + N generic inputs. */
256 c
->MaxVarying
= screen
->get_shader_param(screen
, PIPE_SHADER_FRAGMENT
,
257 PIPE_SHADER_CAP_MAX_INPUTS
);
258 c
->MaxVarying
= MIN2(c
->MaxVarying
, MAX_VARYING
);
259 c
->FragmentProgram
.MaxInputComponents
= c
->MaxVarying
* 4;
260 c
->VertexProgram
.MaxOutputComponents
= c
->MaxVarying
* 4;
261 c
->GeometryProgram
.MaxInputComponents
= c
->MaxVarying
* 4;
262 c
->GeometryProgram
.MaxOutputComponents
= c
->MaxVarying
* 4;
264 c
->MinProgramTexelOffset
= screen
->get_param(screen
, PIPE_CAP_MIN_TEXEL_OFFSET
);
265 c
->MaxProgramTexelOffset
= screen
->get_param(screen
, PIPE_CAP_MAX_TEXEL_OFFSET
);
267 c
->UniformBooleanTrue
= ~0;
269 c
->MaxTransformFeedbackBuffers
=
270 screen
->get_param(screen
, PIPE_CAP_MAX_STREAM_OUTPUT_BUFFERS
);
271 c
->MaxTransformFeedbackBuffers
= MIN2(c
->MaxTransformFeedbackBuffers
, MAX_FEEDBACK_BUFFERS
);
272 c
->MaxTransformFeedbackSeparateComponents
=
273 screen
->get_param(screen
, PIPE_CAP_MAX_STREAM_OUTPUT_SEPARATE_COMPONENTS
);
274 c
->MaxTransformFeedbackInterleavedComponents
=
275 screen
->get_param(screen
, PIPE_CAP_MAX_STREAM_OUTPUT_INTERLEAVED_COMPONENTS
);
277 c
->StripTextureBorder
= GL_TRUE
;
279 c
->GLSLSkipStrictMaxUniformLimitCheck
=
280 screen
->get_param(screen
, PIPE_CAP_TGSI_CAN_COMPACT_CONSTANTS
);
283 st
->ctx
->Extensions
.ARB_uniform_buffer_object
= GL_TRUE
;
284 c
->UniformBufferOffsetAlignment
=
285 screen
->get_param(screen
, PIPE_CAP_CONSTANT_BUFFER_OFFSET_ALIGNMENT
);
286 c
->MaxCombinedUniformBlocks
= c
->MaxUniformBufferBindings
=
287 c
->VertexProgram
.MaxUniformBlocks
+
288 c
->GeometryProgram
.MaxUniformBlocks
+
289 c
->FragmentProgram
.MaxUniformBlocks
;
290 assert(c
->MaxCombinedUniformBlocks
<= MAX_COMBINED_UNIFORM_BUFFERS
);
296 * Given a member \c x of struct gl_extensions, return offset of
299 #define o(x) offsetof(struct gl_extensions, x)
302 struct st_extension_cap_mapping
{
303 int extension_offset
;
307 struct st_extension_format_mapping
{
308 int extension_offset
[2];
309 enum pipe_format format
[8];
311 /* If TRUE, at least one format must be supported for the extensions to be
312 * advertised. If FALSE, all the formats must be supported. */
313 GLboolean need_at_least_one
;
317 * Enable extensions if certain pipe formats are supported by the driver.
318 * What extensions will be enabled and what formats must be supported is
319 * described by the array of st_extension_format_mapping.
321 * target and bind_flags are passed to is_format_supported.
323 static void init_format_extensions(struct st_context
*st
,
324 const struct st_extension_format_mapping
*mapping
,
325 unsigned num_mappings
,
326 enum pipe_texture_target target
,
329 struct pipe_screen
*screen
= st
->pipe
->screen
;
330 GLboolean
*extensions
= (GLboolean
*) &st
->ctx
->Extensions
;
333 int num_formats
= Elements(mapping
->format
);
334 int num_ext
= Elements(mapping
->extension_offset
);
336 for (i
= 0; i
< num_mappings
; i
++) {
337 int num_supported
= 0;
339 /* Examine each format in the list. */
340 for (j
= 0; j
< num_formats
&& mapping
[i
].format
[j
]; j
++) {
341 if (screen
->is_format_supported(screen
, mapping
[i
].format
[j
],
342 target
, 0, bind_flags
)) {
347 if (!num_supported
||
348 (!mapping
[i
].need_at_least_one
&& num_supported
!= j
)) {
352 /* Enable all extensions in the list. */
353 for (j
= 0; j
< num_ext
&& mapping
[i
].extension_offset
[j
]; j
++)
354 extensions
[mapping
[i
].extension_offset
[j
]] = GL_TRUE
;
359 * Use pipe_screen::get_param() to query PIPE_CAP_ values to determine
360 * which GL extensions are supported.
361 * Quite a few extensions are always supported because they are standard
362 * features or can be built on top of other gallium features.
363 * Some fine tuning may still be needed.
365 void st_init_extensions(struct st_context
*st
)
367 struct pipe_screen
*screen
= st
->pipe
->screen
;
368 struct gl_context
*ctx
= st
->ctx
;
369 int i
, glsl_feature_level
;
370 GLboolean
*extensions
= (GLboolean
*) &ctx
->Extensions
;
372 static const struct st_extension_cap_mapping cap_mapping
[] = {
373 { o(ARB_base_instance
), PIPE_CAP_START_INSTANCE
},
374 { o(ARB_depth_clamp
), PIPE_CAP_DEPTH_CLIP_DISABLE
},
375 { o(ARB_depth_texture
), PIPE_CAP_TEXTURE_SHADOW_MAP
},
376 { o(ARB_draw_buffers_blend
), PIPE_CAP_INDEP_BLEND_FUNC
},
377 { o(ARB_draw_instanced
), PIPE_CAP_TGSI_INSTANCEID
},
378 { o(ARB_fragment_program_shadow
), PIPE_CAP_TEXTURE_SHADOW_MAP
},
379 { o(ARB_instanced_arrays
), PIPE_CAP_VERTEX_ELEMENT_INSTANCE_DIVISOR
},
380 { o(ARB_occlusion_query
), PIPE_CAP_OCCLUSION_QUERY
},
381 { o(ARB_occlusion_query2
), PIPE_CAP_OCCLUSION_QUERY
},
382 { o(ARB_point_sprite
), PIPE_CAP_POINT_SPRITE
},
383 { o(ARB_seamless_cube_map
), PIPE_CAP_SEAMLESS_CUBE_MAP
},
384 { o(ARB_shader_stencil_export
), PIPE_CAP_SHADER_STENCIL_EXPORT
},
385 { o(ARB_shader_texture_lod
), PIPE_CAP_SM3
},
386 { o(ARB_shadow
), PIPE_CAP_TEXTURE_SHADOW_MAP
},
387 { o(ARB_texture_mirror_clamp_to_edge
), PIPE_CAP_TEXTURE_MIRROR_CLAMP
},
388 { o(ARB_texture_non_power_of_two
), PIPE_CAP_NPOT_TEXTURES
},
389 { o(ARB_timer_query
), PIPE_CAP_QUERY_TIMESTAMP
},
390 { o(ARB_transform_feedback2
), PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME
},
391 { o(ARB_transform_feedback3
), PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME
},
393 { o(EXT_blend_equation_separate
), PIPE_CAP_BLEND_EQUATION_SEPARATE
},
394 { o(EXT_draw_buffers2
), PIPE_CAP_INDEP_BLEND_ENABLE
},
395 { o(EXT_stencil_two_side
), PIPE_CAP_TWO_SIDED_STENCIL
},
396 { o(EXT_texture_array
), PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS
},
397 { o(EXT_texture_filter_anisotropic
), PIPE_CAP_ANISOTROPIC_FILTER
},
398 { o(EXT_texture_mirror_clamp
), PIPE_CAP_TEXTURE_MIRROR_CLAMP
},
399 { o(EXT_texture_swizzle
), PIPE_CAP_TEXTURE_SWIZZLE
},
400 { o(EXT_transform_feedback
), PIPE_CAP_MAX_STREAM_OUTPUT_BUFFERS
},
402 { o(AMD_seamless_cubemap_per_texture
), PIPE_CAP_SEAMLESS_CUBE_MAP_PER_TEXTURE
},
403 { o(ATI_separate_stencil
), PIPE_CAP_TWO_SIDED_STENCIL
},
404 { o(ATI_texture_mirror_once
), PIPE_CAP_TEXTURE_MIRROR_CLAMP
},
405 { o(NV_conditional_render
), PIPE_CAP_CONDITIONAL_RENDER
},
406 { o(NV_texture_barrier
), PIPE_CAP_TEXTURE_BARRIER
},
407 /* GL_NV_point_sprite is not supported by gallium because we don't
408 * support the GL_POINT_SPRITE_R_MODE_NV option. */
409 { o(MESA_texture_array
), PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS
},
411 { o(OES_standard_derivatives
), PIPE_CAP_SM3
},
412 { o(ARB_texture_cube_map_array
), PIPE_CAP_CUBE_MAP_ARRAY
},
413 { o(ARB_texture_multisample
), PIPE_CAP_TEXTURE_MULTISAMPLE
}
416 /* Required: render target and sampler support */
417 static const struct st_extension_format_mapping rendertarget_mapping
[] = {
418 { { o(ARB_texture_float
) },
419 { PIPE_FORMAT_R32G32B32A32_FLOAT
,
420 PIPE_FORMAT_R16G16B16A16_FLOAT
} },
422 { { o(ARB_texture_rgb10_a2ui
) },
423 { PIPE_FORMAT_B10G10R10A2_UINT
} },
425 { { o(EXT_framebuffer_sRGB
) },
426 { PIPE_FORMAT_A8B8G8R8_SRGB
,
427 PIPE_FORMAT_B8G8R8A8_SRGB
},
428 GL_TRUE
}, /* at least one format must be supported */
430 { { o(EXT_packed_float
) },
431 { PIPE_FORMAT_R11G11B10_FLOAT
} },
433 { { o(EXT_texture_integer
) },
434 { PIPE_FORMAT_R32G32B32A32_UINT
,
435 PIPE_FORMAT_R32G32B32A32_SINT
} },
437 { { o(ARB_texture_rg
) },
438 { PIPE_FORMAT_R8_UNORM
,
439 PIPE_FORMAT_R8G8_UNORM
} },
442 /* Required: depth stencil and sampler support */
443 static const struct st_extension_format_mapping depthstencil_mapping
[] = {
444 { { o(ARB_depth_buffer_float
) },
445 { PIPE_FORMAT_Z32_FLOAT
,
446 PIPE_FORMAT_Z32_FLOAT_S8X24_UINT
} },
448 { { o(ARB_framebuffer_object
),
449 o(EXT_packed_depth_stencil
) },
450 { PIPE_FORMAT_S8_UINT_Z24_UNORM
,
451 PIPE_FORMAT_Z24_UNORM_S8_UINT
},
452 GL_TRUE
}, /* at least one format must be supported */
455 /* Required: sampler support */
456 static const struct st_extension_format_mapping texture_mapping
[] = {
457 { { o(ARB_texture_compression_rgtc
) },
458 { PIPE_FORMAT_RGTC1_UNORM
,
459 PIPE_FORMAT_RGTC1_SNORM
,
460 PIPE_FORMAT_RGTC2_UNORM
,
461 PIPE_FORMAT_RGTC2_SNORM
} },
463 { { o(EXT_texture_compression_latc
) },
464 { PIPE_FORMAT_LATC1_UNORM
,
465 PIPE_FORMAT_LATC1_SNORM
,
466 PIPE_FORMAT_LATC2_UNORM
,
467 PIPE_FORMAT_LATC2_SNORM
} },
469 { { o(EXT_texture_compression_s3tc
),
470 o(ANGLE_texture_compression_dxt
) },
471 { PIPE_FORMAT_DXT1_RGB
,
472 PIPE_FORMAT_DXT1_RGBA
,
473 PIPE_FORMAT_DXT3_RGBA
,
474 PIPE_FORMAT_DXT5_RGBA
} },
476 { { o(EXT_texture_shared_exponent
) },
477 { PIPE_FORMAT_R9G9B9E5_FLOAT
} },
479 { { o(EXT_texture_snorm
) },
480 { PIPE_FORMAT_R8G8B8A8_SNORM
} },
482 { { o(EXT_texture_sRGB
),
483 o(EXT_texture_sRGB_decode
) },
484 { PIPE_FORMAT_A8B8G8R8_SRGB
,
485 PIPE_FORMAT_B8G8R8A8_SRGB
},
486 GL_TRUE
}, /* at least one format must be supported */
488 { { o(ATI_texture_compression_3dc
) },
489 { PIPE_FORMAT_LATC2_UNORM
} },
491 { { o(MESA_ycbcr_texture
) },
494 GL_TRUE
}, /* at least one format must be supported */
496 { { o(OES_compressed_ETC1_RGB8_texture
) },
497 { PIPE_FORMAT_ETC1_RGB8
} },
500 /* Required: vertex fetch support. */
501 static const struct st_extension_format_mapping vertex_mapping
[] = {
502 { { o(ARB_vertex_type_2_10_10_10_rev
) },
503 { PIPE_FORMAT_R10G10B10A2_UNORM
,
504 PIPE_FORMAT_B10G10R10A2_UNORM
,
505 PIPE_FORMAT_R10G10B10A2_SNORM
,
506 PIPE_FORMAT_B10G10R10A2_SNORM
,
507 PIPE_FORMAT_R10G10B10A2_USCALED
,
508 PIPE_FORMAT_B10G10R10A2_USCALED
,
509 PIPE_FORMAT_R10G10B10A2_SSCALED
,
510 PIPE_FORMAT_B10G10R10A2_SSCALED
} },
513 static const struct st_extension_format_mapping tbo_rgb32
[] = {
514 { {o(ARB_texture_buffer_object_rgb32
) },
515 { PIPE_FORMAT_R32G32B32_FLOAT
,
516 PIPE_FORMAT_R32G32B32_UINT
,
517 PIPE_FORMAT_R32G32B32_SINT
,
522 * Extensions that are supported by all Gallium drivers:
524 ctx
->Extensions
.ARB_ES2_compatibility
= GL_TRUE
;
525 ctx
->Extensions
.ARB_draw_elements_base_vertex
= GL_TRUE
;
526 ctx
->Extensions
.ARB_explicit_attrib_location
= GL_TRUE
;
527 ctx
->Extensions
.ARB_fragment_coord_conventions
= GL_TRUE
;
528 ctx
->Extensions
.ARB_fragment_program
= GL_TRUE
;
529 ctx
->Extensions
.ARB_fragment_shader
= GL_TRUE
;
530 ctx
->Extensions
.ARB_half_float_pixel
= GL_TRUE
;
531 ctx
->Extensions
.ARB_half_float_vertex
= GL_TRUE
;
532 ctx
->Extensions
.ARB_internalformat_query
= GL_TRUE
;
533 ctx
->Extensions
.ARB_map_buffer_range
= GL_TRUE
;
534 ctx
->Extensions
.ARB_texture_border_clamp
= GL_TRUE
; /* XXX temp */
535 ctx
->Extensions
.ARB_texture_cube_map
= GL_TRUE
;
536 ctx
->Extensions
.ARB_texture_env_combine
= GL_TRUE
;
537 ctx
->Extensions
.ARB_texture_env_crossbar
= GL_TRUE
;
538 ctx
->Extensions
.ARB_texture_env_dot3
= GL_TRUE
;
539 ctx
->Extensions
.ARB_vertex_program
= GL_TRUE
;
540 ctx
->Extensions
.ARB_vertex_shader
= GL_TRUE
;
542 ctx
->Extensions
.EXT_blend_color
= GL_TRUE
;
543 ctx
->Extensions
.EXT_blend_func_separate
= GL_TRUE
;
544 ctx
->Extensions
.EXT_blend_minmax
= GL_TRUE
;
545 ctx
->Extensions
.EXT_framebuffer_blit
= GL_TRUE
;
546 ctx
->Extensions
.EXT_gpu_program_parameters
= GL_TRUE
;
547 ctx
->Extensions
.EXT_pixel_buffer_object
= GL_TRUE
;
548 ctx
->Extensions
.EXT_point_parameters
= GL_TRUE
;
549 ctx
->Extensions
.EXT_provoking_vertex
= GL_TRUE
;
552 * Don't enable EXT_separate_shader_objects. It disallows a certain
553 * optimization in the GLSL compiler and therefore is considered
556 ctx
->Extensions
.EXT_separate_shader_objects
= GL_FALSE
;
558 ctx
->Extensions
.EXT_texture_env_dot3
= GL_TRUE
;
559 ctx
->Extensions
.EXT_vertex_array_bgra
= GL_TRUE
;
561 ctx
->Extensions
.ATI_texture_env_combine3
= GL_TRUE
;
563 ctx
->Extensions
.MESA_pack_invert
= GL_TRUE
;
565 ctx
->Extensions
.NV_fog_distance
= GL_TRUE
;
566 ctx
->Extensions
.NV_texture_env_combine4
= GL_TRUE
;
567 ctx
->Extensions
.NV_texture_rectangle
= GL_TRUE
;
569 ctx
->Extensions
.OES_EGL_image
= GL_TRUE
;
570 ctx
->Extensions
.OES_EGL_image_external
= GL_TRUE
;
571 ctx
->Extensions
.OES_draw_texture
= GL_TRUE
;
573 /* Expose the extensions which directly correspond to gallium caps. */
574 for (i
= 0; i
< Elements(cap_mapping
); i
++) {
575 if (screen
->get_param(screen
, cap_mapping
[i
].cap
)) {
576 extensions
[cap_mapping
[i
].extension_offset
] = GL_TRUE
;
580 /* Expose the extensions which directly correspond to gallium formats. */
581 init_format_extensions(st
, rendertarget_mapping
,
582 Elements(rendertarget_mapping
), PIPE_TEXTURE_2D
,
583 PIPE_BIND_RENDER_TARGET
| PIPE_BIND_SAMPLER_VIEW
);
584 init_format_extensions(st
, depthstencil_mapping
,
585 Elements(depthstencil_mapping
), PIPE_TEXTURE_2D
,
586 PIPE_BIND_DEPTH_STENCIL
| PIPE_BIND_SAMPLER_VIEW
);
587 init_format_extensions(st
, texture_mapping
, Elements(texture_mapping
),
588 PIPE_TEXTURE_2D
, PIPE_BIND_SAMPLER_VIEW
);
589 init_format_extensions(st
, vertex_mapping
, Elements(vertex_mapping
),
590 PIPE_BUFFER
, PIPE_BIND_VERTEX_BUFFER
);
592 /* Figure out GLSL support. */
593 glsl_feature_level
= screen
->get_param(screen
, PIPE_CAP_GLSL_FEATURE_LEVEL
);
595 if (glsl_feature_level
>= 140) {
596 ctx
->Const
.GLSLVersion
= 140;
597 } else if (glsl_feature_level
>= 130) {
598 ctx
->Const
.GLSLVersion
= 130;
600 ctx
->Const
.GLSLVersion
= 120;
603 _mesa_override_glsl_version(st
->ctx
);
605 if (st
->options
.force_glsl_version
> 0 &&
606 st
->options
.force_glsl_version
<= ctx
->Const
.GLSLVersion
) {
607 ctx
->Const
.ForceGLSLVersion
= st
->options
.force_glsl_version
;
610 if (ctx
->Const
.GLSLVersion
>= 130) {
611 ctx
->Const
.NativeIntegers
= GL_TRUE
;
612 ctx
->Const
.MaxClipPlanes
= 8;
614 /* Extensions that either depend on GLSL 1.30 or are a subset thereof. */
615 ctx
->Extensions
.ARB_conservative_depth
= GL_TRUE
;
616 ctx
->Extensions
.ARB_shading_language_packing
= GL_TRUE
;
617 ctx
->Extensions
.OES_depth_texture_cube_map
= GL_TRUE
;
618 ctx
->Extensions
.ARB_shading_language_420pack
= GL_TRUE
;
620 if (!st
->options
.disable_shader_bit_encoding
) {
621 ctx
->Extensions
.ARB_shader_bit_encoding
= GL_TRUE
;
624 /* Optional integer support for GLSL 1.2. */
625 if (screen
->get_shader_param(screen
, PIPE_SHADER_VERTEX
,
626 PIPE_SHADER_CAP_INTEGERS
) &&
627 screen
->get_shader_param(screen
, PIPE_SHADER_FRAGMENT
,
628 PIPE_SHADER_CAP_INTEGERS
)) {
629 ctx
->Const
.NativeIntegers
= GL_TRUE
;
633 /* Below are the cases which cannot be moved into tables easily. */
635 if (!ctx
->Mesa_DXTn
&& !st
->options
.force_s3tc_enable
) {
636 ctx
->Extensions
.EXT_texture_compression_s3tc
= GL_FALSE
;
637 ctx
->Extensions
.ANGLE_texture_compression_dxt
= GL_FALSE
;
640 if (screen
->get_shader_param(screen
, PIPE_SHADER_GEOMETRY
,
641 PIPE_SHADER_CAP_MAX_INSTRUCTIONS
) > 0) {
642 #if 0 /* XXX re-enable when GLSL compiler again supports geometry shaders */
643 ctx
->Extensions
.ARB_geometry_shader4
= GL_TRUE
;
647 ctx
->Extensions
.NV_primitive_restart
= GL_TRUE
;
648 if (!screen
->get_param(screen
, PIPE_CAP_PRIMITIVE_RESTART
)) {
649 ctx
->Const
.PrimitiveRestartInSoftware
= GL_TRUE
;
652 /* ARB_color_buffer_float. */
653 if (screen
->get_param(screen
, PIPE_CAP_VERTEX_COLOR_UNCLAMPED
)) {
654 ctx
->Extensions
.ARB_color_buffer_float
= GL_TRUE
;
656 if (!screen
->get_param(screen
, PIPE_CAP_VERTEX_COLOR_CLAMPED
)) {
657 st
->clamp_vert_color_in_shader
= TRUE
;
660 if (!screen
->get_param(screen
, PIPE_CAP_FRAGMENT_COLOR_CLAMPED
)) {
661 st
->clamp_frag_color_in_shader
= TRUE
;
664 /* For drivers which cannot do color clamping, it's better to just
665 * disable ARB_color_buffer_float in the core profile, because
666 * the clamping is deprecated there anyway. */
667 if (ctx
->API
== API_OPENGL_CORE
&&
668 (st
->clamp_frag_color_in_shader
|| st
->clamp_vert_color_in_shader
)) {
669 st
->clamp_vert_color_in_shader
= GL_FALSE
;
670 st
->clamp_frag_color_in_shader
= GL_FALSE
;
671 ctx
->Extensions
.ARB_color_buffer_float
= GL_FALSE
;
675 if (screen
->fence_finish
) {
676 ctx
->Extensions
.ARB_sync
= GL_TRUE
;
679 /* Maximum sample count. */
680 for (i
= 16; i
> 0; --i
) {
681 enum pipe_format pformat
= st_choose_format(st
, GL_RGBA
,
684 PIPE_BIND_RENDER_TARGET
, FALSE
);
685 if (pformat
!= PIPE_FORMAT_NONE
) {
686 ctx
->Const
.MaxSamples
= i
;
687 ctx
->Const
.MaxColorTextureSamples
= i
;
691 for (i
= ctx
->Const
.MaxSamples
; i
> 0; --i
) {
692 enum pipe_format pformat
= st_choose_format(st
, GL_DEPTH_STENCIL
,
695 PIPE_BIND_DEPTH_STENCIL
, FALSE
);
696 if (pformat
!= PIPE_FORMAT_NONE
) {
697 ctx
->Const
.MaxDepthTextureSamples
= i
;
701 for (i
= ctx
->Const
.MaxSamples
; i
> 0; --i
) {
702 enum pipe_format pformat
= st_choose_format(st
, GL_RGBA_INTEGER
,
705 PIPE_BIND_RENDER_TARGET
, FALSE
);
706 if (pformat
!= PIPE_FORMAT_NONE
) {
707 ctx
->Const
.MaxIntegerSamples
= i
;
711 if (ctx
->Const
.MaxSamples
== 1) {
712 /* one sample doesn't really make sense */
713 ctx
->Const
.MaxSamples
= 0;
715 else if (ctx
->Const
.MaxSamples
>= 2) {
716 ctx
->Extensions
.EXT_framebuffer_multisample
= GL_TRUE
;
717 ctx
->Extensions
.EXT_framebuffer_multisample_blit_scaled
= GL_TRUE
;
720 if (ctx
->Const
.MaxDualSourceDrawBuffers
> 0 &&
721 !st
->options
.disable_blend_func_extended
)
722 ctx
->Extensions
.ARB_blend_func_extended
= GL_TRUE
;
724 st
->has_time_elapsed
=
725 screen
->get_param(screen
, PIPE_CAP_QUERY_TIME_ELAPSED
);
727 if (st
->has_time_elapsed
||
728 ctx
->Extensions
.ARB_timer_query
) {
729 ctx
->Extensions
.EXT_timer_query
= GL_TRUE
;
732 if (ctx
->Extensions
.ARB_transform_feedback2
&&
733 ctx
->Extensions
.ARB_draw_instanced
) {
734 ctx
->Extensions
.ARB_transform_feedback_instanced
= GL_TRUE
;
736 if (st
->options
.force_glsl_extensions_warn
)
737 ctx
->Const
.ForceGLSLExtensionsWarn
= 1;
739 if (st
->options
.disable_glsl_line_continuations
)
740 ctx
->Const
.DisableGLSLLineContinuations
= 1;
742 ctx
->Const
.MinMapBufferAlignment
=
743 screen
->get_param(screen
, PIPE_CAP_MIN_MAP_BUFFER_ALIGNMENT
);
744 if (ctx
->Const
.MinMapBufferAlignment
>= 64) {
745 ctx
->Extensions
.ARB_map_buffer_alignment
= GL_TRUE
;
747 if (screen
->get_param(screen
, PIPE_CAP_TEXTURE_BUFFER_OBJECTS
)) {
748 ctx
->Extensions
.ARB_texture_buffer_object
= GL_TRUE
;
750 ctx
->Const
.MaxTextureBufferSize
=
751 _min(screen
->get_param(screen
, PIPE_CAP_MAX_TEXTURE_BUFFER_SIZE
),
753 ctx
->Const
.TextureBufferOffsetAlignment
=
754 screen
->get_param(screen
, PIPE_CAP_TEXTURE_BUFFER_OFFSET_ALIGNMENT
);
756 if (ctx
->Const
.TextureBufferOffsetAlignment
)
757 ctx
->Extensions
.ARB_texture_buffer_range
= GL_TRUE
;
759 init_format_extensions(st
, tbo_rgb32
, Elements(tbo_rgb32
),
760 PIPE_BUFFER
, PIPE_BIND_SAMPLER_VIEW
);
764 /* Unpacking a varying in the fragment shader costs 1 texture indirection.
765 * If the number of available texture indirections is very limited, then we
766 * prefer to disable varying packing rather than run the risk of varying
767 * packing preventing a shader from running.
769 if (screen
->get_shader_param(screen
, PIPE_SHADER_FRAGMENT
,
770 PIPE_SHADER_CAP_MAX_TEX_INDIRECTIONS
) <= 8) {
771 /* We can't disable varying packing if transform feedback is available,
772 * because transform feedback code assumes a packed varying layout.
774 if (!ctx
->Extensions
.EXT_transform_feedback
)
775 ctx
->Const
.DisableVaryingPacking
= GL_TRUE
;