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"
33 #include "pipe/p_context.h"
34 #include "pipe/p_defines.h"
35 #include "pipe/p_screen.h"
37 #include "st_context.h"
38 #include "st_extensions.h"
41 static int _min(int a
, int b
)
43 return (a
< b
) ? a
: b
;
46 static float _maxf(float a
, float b
)
48 return (a
> b
) ? a
: b
;
51 static int _clamp(int a
, int min
, int max
)
63 * Query driver to get implementation limits.
64 * Note that we have to limit/clamp against Mesa's internal limits too.
66 void st_init_limits(struct st_context
*st
)
68 struct pipe_screen
*screen
= st
->pipe
->screen
;
69 struct gl_constants
*c
= &st
->ctx
->Const
;
73 = _min(screen
->get_param(screen
, PIPE_CAP_MAX_TEXTURE_2D_LEVELS
),
77 = _min(screen
->get_param(screen
, PIPE_CAP_MAX_TEXTURE_3D_LEVELS
),
78 MAX_3D_TEXTURE_LEVELS
);
80 c
->MaxCubeTextureLevels
81 = _min(screen
->get_param(screen
, PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS
),
82 MAX_CUBE_TEXTURE_LEVELS
);
85 = _min(1 << (c
->MaxTextureLevels
- 1), MAX_TEXTURE_RECT_SIZE
);
87 c
->MaxTextureImageUnits
88 = _min(screen
->get_param(screen
, PIPE_CAP_MAX_TEXTURE_IMAGE_UNITS
),
89 MAX_TEXTURE_IMAGE_UNITS
);
91 c
->MaxVertexTextureImageUnits
92 = _min(screen
->get_param(screen
, PIPE_CAP_MAX_VERTEX_TEXTURE_UNITS
),
93 MAX_VERTEX_TEXTURE_IMAGE_UNITS
);
95 c
->MaxCombinedTextureImageUnits
96 = _min(screen
->get_param(screen
, PIPE_CAP_MAX_COMBINED_SAMPLERS
),
97 MAX_COMBINED_TEXTURE_IMAGE_UNITS
);
99 c
->MaxTextureCoordUnits
100 = _min(c
->MaxTextureImageUnits
, MAX_TEXTURE_COORD_UNITS
);
102 c
->MaxTextureUnits
= _min(c
->MaxTextureImageUnits
, c
->MaxTextureCoordUnits
);
105 = _clamp(screen
->get_param(screen
, PIPE_CAP_MAX_RENDER_TARGETS
),
106 1, MAX_DRAW_BUFFERS
);
109 = _maxf(1.0f
, screen
->get_paramf(screen
, PIPE_CAP_MAX_LINE_WIDTH
));
111 = _maxf(1.0f
, screen
->get_paramf(screen
, PIPE_CAP_MAX_LINE_WIDTH_AA
));
114 = _maxf(1.0f
, screen
->get_paramf(screen
, PIPE_CAP_MAX_POINT_WIDTH
));
116 = _maxf(1.0f
, screen
->get_paramf(screen
, PIPE_CAP_MAX_POINT_WIDTH_AA
));
117 /* called after _mesa_create_context/_mesa_init_point, fix default user
118 * settable max point size up
120 st
->ctx
->Point
.MaxSize
= MAX2(c
->MaxPointSize
, c
->MaxPointSizeAA
);
121 /* these are not queryable. Note that GL basically mandates a 1.0 minimum
122 * for non-aa sizes, but we can go down to 0.0 for aa points.
124 c
->MinPointSize
= 1.0f
;
125 c
->MinPointSizeAA
= 0.0f
;
127 c
->MaxTextureMaxAnisotropy
128 = _maxf(2.0f
, screen
->get_paramf(screen
, PIPE_CAP_MAX_TEXTURE_ANISOTROPY
));
131 = screen
->get_paramf(screen
, PIPE_CAP_MAX_TEXTURE_LOD_BIAS
);
134 = CLAMP(screen
->get_param(screen
, PIPE_CAP_MAX_RENDER_TARGETS
),
135 1, MAX_DRAW_BUFFERS
);
137 /* Quads always follow GL provoking rules. */
138 c
->QuadsFollowProvokingVertexConvention
= GL_FALSE
;
140 for (sh
= 0; sh
< MESA_SHADER_TYPES
; ++sh
) {
141 struct gl_shader_compiler_options
*options
=
142 &st
->ctx
->ShaderCompilerOptions
[sh
];
143 struct gl_program_constants
*pc
;
146 case PIPE_SHADER_FRAGMENT
:
147 pc
= &c
->FragmentProgram
;
149 case PIPE_SHADER_VERTEX
:
150 pc
= &c
->VertexProgram
;
152 case PIPE_SHADER_GEOMETRY
:
153 pc
= &c
->GeometryProgram
;
160 pc
->MaxNativeInstructions
= screen
->get_shader_param(screen
, sh
, PIPE_SHADER_CAP_MAX_INSTRUCTIONS
);
161 pc
->MaxNativeAluInstructions
= screen
->get_shader_param(screen
, sh
, PIPE_SHADER_CAP_MAX_ALU_INSTRUCTIONS
);
162 pc
->MaxNativeTexInstructions
= screen
->get_shader_param(screen
, sh
, PIPE_SHADER_CAP_MAX_TEX_INSTRUCTIONS
);
163 pc
->MaxNativeTexIndirections
= screen
->get_shader_param(screen
, sh
, PIPE_SHADER_CAP_MAX_TEX_INDIRECTIONS
);
164 pc
->MaxNativeAttribs
= screen
->get_shader_param(screen
, sh
, PIPE_SHADER_CAP_MAX_INPUTS
);
165 pc
->MaxNativeTemps
= screen
->get_shader_param(screen
, sh
, PIPE_SHADER_CAP_MAX_TEMPS
);
166 pc
->MaxNativeAddressRegs
= screen
->get_shader_param(screen
, sh
, PIPE_SHADER_CAP_MAX_ADDRS
);
167 pc
->MaxNativeParameters
= screen
->get_shader_param(screen
, sh
, PIPE_SHADER_CAP_MAX_CONSTS
);
168 pc
->MaxUniformComponents
= 4 * MIN2(pc
->MaxNativeParameters
, MAX_UNIFORMS
);
170 options
->EmitNoNoise
= TRUE
;
172 /* TODO: make these more fine-grained if anyone needs it */
173 options
->EmitNoIfs
= !screen
->get_shader_param(screen
, sh
, PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH
);
174 options
->EmitNoLoops
= !screen
->get_shader_param(screen
, sh
, PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH
);
175 options
->EmitNoFunctions
= !screen
->get_shader_param(screen
, sh
, PIPE_SHADER_CAP_SUBROUTINES
);
176 options
->EmitNoMainReturn
= !screen
->get_shader_param(screen
, sh
, PIPE_SHADER_CAP_SUBROUTINES
);
178 options
->EmitNoCont
= !screen
->get_shader_param(screen
, sh
, PIPE_SHADER_CAP_TGSI_CONT_SUPPORTED
);
180 options
->EmitNoIndirectInput
= !screen
->get_shader_param(screen
, sh
,
181 PIPE_SHADER_CAP_INDIRECT_INPUT_ADDR
);
182 options
->EmitNoIndirectOutput
= !screen
->get_shader_param(screen
, sh
,
183 PIPE_SHADER_CAP_INDIRECT_OUTPUT_ADDR
);
184 options
->EmitNoIndirectTemp
= !screen
->get_shader_param(screen
, sh
,
185 PIPE_SHADER_CAP_INDIRECT_TEMP_ADDR
);
186 options
->EmitNoIndirectUniform
= !screen
->get_shader_param(screen
, sh
,
187 PIPE_SHADER_CAP_INDIRECT_CONST_ADDR
);
189 if(options
->EmitNoLoops
)
190 options
->MaxUnrollIterations
= MIN2(screen
->get_shader_param(screen
, sh
, PIPE_SHADER_CAP_MAX_INSTRUCTIONS
), 65536);
193 /* PIPE_CAP_MAX_FS_INPUTS specifies the number of COLORn + GENERICn inputs
194 * and is set in MaxNativeAttribs. It's always 2 colors + N generic
195 * attributes. The GLSL compiler never uses COLORn for varyings, so we
196 * subtract the 2 colors to get the maximum number of varyings (generic
197 * attributes) supported by a driver. */
198 c
->MaxVarying
= screen
->get_shader_param(screen
, PIPE_SHADER_FRAGMENT
, PIPE_SHADER_CAP_MAX_INPUTS
) - 2;
199 c
->MaxVarying
= MIN2(c
->MaxVarying
, MAX_VARYING
);
201 /* XXX we'll need a better query here someday */
202 if (screen
->get_param(screen
, PIPE_CAP_GLSL
)) {
203 c
->GLSLVersion
= 120;
209 * Use pipe_screen::get_param() to query PIPE_CAP_ values to determine
210 * which GL extensions are supported.
211 * Quite a few extensions are always supported because they are standard
212 * features or can be built on top of other gallium features.
213 * Some fine tuning may still be needed.
215 void st_init_extensions(struct st_context
*st
)
217 struct pipe_screen
*screen
= st
->pipe
->screen
;
218 struct gl_context
*ctx
= st
->ctx
;
221 * Extensions that are supported by all Gallium drivers:
223 ctx
->Extensions
.ARB_copy_buffer
= GL_TRUE
;
224 ctx
->Extensions
.ARB_draw_elements_base_vertex
= GL_TRUE
;
225 ctx
->Extensions
.ARB_fragment_coord_conventions
= GL_TRUE
;
226 ctx
->Extensions
.ARB_fragment_program
= GL_TRUE
;
227 ctx
->Extensions
.ARB_map_buffer_range
= GL_TRUE
;
228 ctx
->Extensions
.ARB_multisample
= GL_TRUE
;
229 ctx
->Extensions
.ARB_texture_border_clamp
= GL_TRUE
; /* XXX temp */
230 ctx
->Extensions
.ARB_texture_compression
= GL_TRUE
;
231 ctx
->Extensions
.ARB_texture_cube_map
= GL_TRUE
;
232 ctx
->Extensions
.ARB_texture_env_combine
= GL_TRUE
;
233 ctx
->Extensions
.ARB_texture_env_crossbar
= GL_TRUE
;
234 ctx
->Extensions
.ARB_texture_env_dot3
= GL_TRUE
;
235 ctx
->Extensions
.ARB_vertex_array_object
= GL_TRUE
;
236 ctx
->Extensions
.ARB_vertex_buffer_object
= GL_TRUE
;
237 ctx
->Extensions
.ARB_vertex_program
= GL_TRUE
;
238 ctx
->Extensions
.ARB_window_pos
= GL_TRUE
;
240 ctx
->Extensions
.EXT_blend_color
= GL_TRUE
;
241 ctx
->Extensions
.EXT_blend_func_separate
= GL_TRUE
;
242 ctx
->Extensions
.EXT_blend_logic_op
= GL_TRUE
;
243 ctx
->Extensions
.EXT_blend_minmax
= GL_TRUE
;
244 ctx
->Extensions
.EXT_blend_subtract
= GL_TRUE
;
245 ctx
->Extensions
.EXT_framebuffer_blit
= GL_TRUE
;
246 ctx
->Extensions
.EXT_framebuffer_object
= GL_TRUE
;
247 ctx
->Extensions
.EXT_framebuffer_multisample
= GL_TRUE
;
248 ctx
->Extensions
.EXT_fog_coord
= GL_TRUE
;
249 ctx
->Extensions
.EXT_gpu_program_parameters
= GL_TRUE
;
250 ctx
->Extensions
.EXT_multi_draw_arrays
= GL_TRUE
;
251 ctx
->Extensions
.EXT_pixel_buffer_object
= GL_TRUE
;
252 ctx
->Extensions
.EXT_point_parameters
= GL_TRUE
;
253 ctx
->Extensions
.EXT_provoking_vertex
= GL_TRUE
;
254 ctx
->Extensions
.EXT_secondary_color
= GL_TRUE
;
255 ctx
->Extensions
.EXT_stencil_wrap
= GL_TRUE
;
256 ctx
->Extensions
.EXT_texture_env_add
= GL_TRUE
;
257 ctx
->Extensions
.EXT_texture_env_combine
= GL_TRUE
;
258 ctx
->Extensions
.EXT_texture_env_dot3
= GL_TRUE
;
259 ctx
->Extensions
.EXT_texture_lod_bias
= GL_TRUE
;
260 ctx
->Extensions
.EXT_vertex_array_bgra
= GL_TRUE
;
262 ctx
->Extensions
.APPLE_vertex_array_object
= GL_TRUE
;
264 ctx
->Extensions
.ATI_texture_env_combine3
= GL_TRUE
;
266 ctx
->Extensions
.MESA_pack_invert
= GL_TRUE
;
268 ctx
->Extensions
.NV_blend_square
= GL_TRUE
;
269 ctx
->Extensions
.NV_texgen_reflection
= GL_TRUE
;
270 ctx
->Extensions
.NV_texture_env_combine4
= GL_TRUE
;
271 ctx
->Extensions
.NV_texture_rectangle
= GL_TRUE
;
273 /* possibly could support the following two */
274 ctx
->Extensions
.NV_vertex_program
= GL_TRUE
;
275 ctx
->Extensions
.NV_vertex_program1_1
= GL_TRUE
;
278 #if FEATURE_OES_EGL_image
279 ctx
->Extensions
.OES_EGL_image
= GL_TRUE
;
281 #if FEATURE_OES_draw_texture
282 ctx
->Extensions
.OES_draw_texture
= GL_TRUE
;
285 ctx
->Extensions
.SGIS_generate_mipmap
= GL_TRUE
;
288 * Extensions that depend on the driver/hardware:
290 if (screen
->get_param(screen
, PIPE_CAP_MAX_RENDER_TARGETS
) > 0) {
291 ctx
->Extensions
.ARB_draw_buffers
= GL_TRUE
;
294 if (screen
->get_param(screen
, PIPE_CAP_TEXTURE_SWIZZLE
) > 0) {
295 ctx
->Extensions
.EXT_texture_swizzle
= GL_TRUE
;
298 if (screen
->get_param(screen
, PIPE_CAP_GLSL
)) {
299 ctx
->Extensions
.ARB_fragment_shader
= GL_TRUE
;
300 ctx
->Extensions
.ARB_vertex_shader
= GL_TRUE
;
301 ctx
->Extensions
.ARB_shader_objects
= GL_TRUE
;
302 ctx
->Extensions
.ARB_shading_language_100
= GL_TRUE
;
303 ctx
->Extensions
.ARB_explicit_attrib_location
= GL_TRUE
;
304 ctx
->Extensions
.EXT_separate_shader_objects
= GL_TRUE
;
307 if (screen
->get_param(screen
, PIPE_CAP_TEXTURE_MIRROR_REPEAT
) > 0) {
308 ctx
->Extensions
.ARB_texture_mirrored_repeat
= GL_TRUE
;
311 if (screen
->get_param(screen
, PIPE_CAP_BLEND_EQUATION_SEPARATE
)) {
312 ctx
->Extensions
.EXT_blend_equation_separate
= GL_TRUE
;
315 if (screen
->get_param(screen
, PIPE_CAP_TEXTURE_MIRROR_CLAMP
) > 0) {
316 ctx
->Extensions
.EXT_texture_mirror_clamp
= GL_TRUE
;
317 ctx
->Extensions
.ATI_texture_mirror_once
= GL_TRUE
;
320 if (screen
->get_param(screen
, PIPE_CAP_NPOT_TEXTURES
)) {
321 ctx
->Extensions
.ARB_texture_non_power_of_two
= GL_TRUE
;
324 if (screen
->get_param(screen
, PIPE_CAP_MAX_TEXTURE_IMAGE_UNITS
) > 1) {
325 ctx
->Extensions
.ARB_multitexture
= GL_TRUE
;
328 if (screen
->get_param(screen
, PIPE_CAP_TWO_SIDED_STENCIL
)) {
329 ctx
->Extensions
.ATI_separate_stencil
= GL_TRUE
;
330 ctx
->Extensions
.EXT_stencil_two_side
= GL_TRUE
;
333 if (screen
->get_param(screen
, PIPE_CAP_ANISOTROPIC_FILTER
)) {
334 ctx
->Extensions
.EXT_texture_filter_anisotropic
= GL_TRUE
;
337 if (screen
->get_param(screen
, PIPE_CAP_POINT_SPRITE
)) {
338 ctx
->Extensions
.ARB_point_sprite
= GL_TRUE
;
339 /* GL_NV_point_sprite is not supported by gallium because we don't
340 * support the GL_POINT_SPRITE_R_MODE_NV option.
344 if (screen
->get_param(screen
, PIPE_CAP_OCCLUSION_QUERY
)) {
345 ctx
->Extensions
.ARB_occlusion_query
= GL_TRUE
;
346 ctx
->Extensions
.ARB_occlusion_query2
= GL_TRUE
;
348 if (screen
->get_param(screen
, PIPE_CAP_TIMER_QUERY
)) {
349 ctx
->Extensions
.EXT_timer_query
= GL_TRUE
;
352 if (screen
->get_param(screen
, PIPE_CAP_TEXTURE_SHADOW_MAP
)) {
353 ctx
->Extensions
.ARB_depth_texture
= GL_TRUE
;
354 ctx
->Extensions
.ARB_fragment_program_shadow
= GL_TRUE
;
355 ctx
->Extensions
.ARB_shadow
= GL_TRUE
;
356 ctx
->Extensions
.EXT_shadow_funcs
= GL_TRUE
;
357 /*ctx->Extensions.ARB_shadow_ambient = GL_TRUE;*/
360 /* GL_EXT_packed_depth_stencil requires both the ability to render to
361 * a depth/stencil buffer and texture from depth/stencil source.
363 if (screen
->is_format_supported(screen
, PIPE_FORMAT_S8_USCALED_Z24_UNORM
,
365 PIPE_BIND_DEPTH_STENCIL
, 0) &&
366 screen
->is_format_supported(screen
, PIPE_FORMAT_S8_USCALED_Z24_UNORM
,
368 PIPE_BIND_SAMPLER_VIEW
, 0)) {
369 ctx
->Extensions
.EXT_packed_depth_stencil
= GL_TRUE
;
371 else if (screen
->is_format_supported(screen
, PIPE_FORMAT_Z24_UNORM_S8_USCALED
,
373 PIPE_BIND_DEPTH_STENCIL
, 0) &&
374 screen
->is_format_supported(screen
, PIPE_FORMAT_Z24_UNORM_S8_USCALED
,
376 PIPE_BIND_SAMPLER_VIEW
, 0)) {
377 ctx
->Extensions
.EXT_packed_depth_stencil
= GL_TRUE
;
381 if (screen
->is_format_supported(screen
, PIPE_FORMAT_A8B8G8R8_SRGB
,
383 PIPE_BIND_SAMPLER_VIEW
, 0) ||
384 screen
->is_format_supported(screen
, PIPE_FORMAT_B8G8R8A8_SRGB
,
386 PIPE_BIND_SAMPLER_VIEW
, 0)) {
387 ctx
->Extensions
.EXT_texture_sRGB
= GL_TRUE
;
390 if (screen
->is_format_supported(screen
, PIPE_FORMAT_R8G8_UNORM
,
392 PIPE_BIND_SAMPLER_VIEW
, 0)) {
393 ctx
->Extensions
.ARB_texture_rg
= GL_TRUE
;
397 if (screen
->is_format_supported(screen
, PIPE_FORMAT_DXT5_RGBA
,
399 PIPE_BIND_SAMPLER_VIEW
, 0) &&
401 screen
->is_format_supported(screen
, PIPE_FORMAT_DXT5_RGBA
,
403 PIPE_BIND_RENDER_TARGET
, 0))) {
404 ctx
->Extensions
.EXT_texture_compression_s3tc
= GL_TRUE
;
405 ctx
->Extensions
.S3_s3tc
= GL_TRUE
;
409 if (screen
->is_format_supported(screen
, PIPE_FORMAT_UYVY
,
411 PIPE_BIND_SAMPLER_VIEW
, 0) ||
412 screen
->is_format_supported(screen
, PIPE_FORMAT_YUYV
,
414 PIPE_BIND_SAMPLER_VIEW
, 0)) {
415 ctx
->Extensions
.MESA_ycbcr_texture
= GL_TRUE
;
418 /* GL_ARB_framebuffer_object */
419 if (ctx
->Extensions
.EXT_packed_depth_stencil
) {
420 /* we support always support GL_EXT_framebuffer_blit */
421 ctx
->Extensions
.ARB_framebuffer_object
= GL_TRUE
;
424 if (st
->pipe
->render_condition
) {
425 ctx
->Extensions
.NV_conditional_render
= GL_TRUE
;
428 if (screen
->get_param(screen
, PIPE_CAP_INDEP_BLEND_ENABLE
)) {
429 ctx
->Extensions
.EXT_draw_buffers2
= GL_TRUE
;
432 /* GL_ARB_half_float_vertex */
433 if (screen
->is_format_supported(screen
, PIPE_FORMAT_R16G16B16A16_FLOAT
,
435 PIPE_BIND_VERTEX_BUFFER
, 0)) {
436 ctx
->Extensions
.ARB_half_float_vertex
= GL_TRUE
;
440 if (screen
->get_param(screen
, PIPE_CAP_INDEP_BLEND_FUNC
)) {
441 ctx
->Extensions
.ARB_draw_buffers_blend
= GL_TRUE
;
445 if (screen
->get_shader_param(screen
, PIPE_SHADER_GEOMETRY
, PIPE_SHADER_CAP_MAX_INSTRUCTIONS
) > 0) {
446 #if 0 /* XXX re-enable when GLSL compiler again supports geometry shaders */
447 ctx
->Extensions
.ARB_geometry_shader4
= GL_TRUE
;
451 if (screen
->get_param(screen
, PIPE_CAP_PRIMITIVE_RESTART
)) {
452 ctx
->Extensions
.NV_primitive_restart
= GL_TRUE
;
455 if (screen
->get_param(screen
, PIPE_CAP_DEPTH_CLAMP
)) {
456 ctx
->Extensions
.ARB_depth_clamp
= GL_TRUE
;
459 if (screen
->get_param(screen
, PIPE_CAP_SHADER_STENCIL_EXPORT
)) {
460 ctx
->Extensions
.ARB_shader_stencil_export
= GL_TRUE
;