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
;
70 struct gl_program_constants
*pc
;
74 = _min(screen
->get_param(screen
, PIPE_CAP_MAX_TEXTURE_2D_LEVELS
),
78 = _min(screen
->get_param(screen
, PIPE_CAP_MAX_TEXTURE_3D_LEVELS
),
79 MAX_3D_TEXTURE_LEVELS
);
81 c
->MaxCubeTextureLevels
82 = _min(screen
->get_param(screen
, PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS
),
83 MAX_CUBE_TEXTURE_LEVELS
);
86 = _min(1 << (c
->MaxTextureLevels
- 1), MAX_TEXTURE_RECT_SIZE
);
88 c
->MaxTextureImageUnits
89 = _min(screen
->get_param(screen
, PIPE_CAP_MAX_TEXTURE_IMAGE_UNITS
),
90 MAX_TEXTURE_IMAGE_UNITS
);
92 c
->MaxVertexTextureImageUnits
93 = _min(screen
->get_param(screen
, PIPE_CAP_MAX_VERTEX_TEXTURE_UNITS
),
94 MAX_VERTEX_TEXTURE_IMAGE_UNITS
);
96 c
->MaxCombinedTextureImageUnits
97 = _min(screen
->get_param(screen
, PIPE_CAP_MAX_COMBINED_SAMPLERS
),
98 MAX_COMBINED_TEXTURE_IMAGE_UNITS
);
100 c
->MaxTextureCoordUnits
101 = _min(c
->MaxTextureImageUnits
, MAX_TEXTURE_COORD_UNITS
);
103 c
->MaxTextureUnits
= _min(c
->MaxTextureImageUnits
, c
->MaxTextureCoordUnits
);
106 = _clamp(screen
->get_param(screen
, PIPE_CAP_MAX_RENDER_TARGETS
),
107 1, MAX_DRAW_BUFFERS
);
110 = _maxf(1.0f
, screen
->get_paramf(screen
, PIPE_CAP_MAX_LINE_WIDTH
));
112 = _maxf(1.0f
, screen
->get_paramf(screen
, PIPE_CAP_MAX_LINE_WIDTH_AA
));
115 = _maxf(1.0f
, screen
->get_paramf(screen
, PIPE_CAP_MAX_POINT_WIDTH
));
117 = _maxf(1.0f
, screen
->get_paramf(screen
, PIPE_CAP_MAX_POINT_WIDTH_AA
));
118 /* called after _mesa_create_context/_mesa_init_point, fix default user
119 * settable max point size up
121 st
->ctx
->Point
.MaxSize
= MAX2(c
->MaxPointSize
, c
->MaxPointSizeAA
);
122 /* these are not queryable. Note that GL basically mandates a 1.0 minimum
123 * for non-aa sizes, but we can go down to 0.0 for aa points.
125 c
->MinPointSize
= 1.0f
;
126 c
->MinPointSizeAA
= 0.0f
;
128 c
->MaxTextureMaxAnisotropy
129 = _maxf(2.0f
, screen
->get_paramf(screen
, PIPE_CAP_MAX_TEXTURE_ANISOTROPY
));
132 = screen
->get_paramf(screen
, PIPE_CAP_MAX_TEXTURE_LOD_BIAS
);
135 = CLAMP(screen
->get_param(screen
, PIPE_CAP_MAX_RENDER_TARGETS
),
136 1, MAX_DRAW_BUFFERS
);
138 /* Is TGSI_OPCODE_CONT supported? */
139 /* XXX separate query for early function return? */
140 for(i
= 0; i
< MESA_SHADER_TYPES
; ++i
)
141 st
->ctx
->ShaderCompilerOptions
[i
].EmitContReturn
=
142 screen
->get_param(screen
, PIPE_CAP_TGSI_CONT_SUPPORTED
);
144 /* Quads always follow GL provoking rules. */
145 c
->QuadsFollowProvokingVertexConvention
= GL_FALSE
;
147 pc
= &c
->FragmentProgram
;
148 pc
->MaxNativeInstructions
= screen
->get_param(screen
, PIPE_CAP_MAX_FS_INSTRUCTIONS
);
149 pc
->MaxNativeAluInstructions
= screen
->get_param(screen
, PIPE_CAP_MAX_FS_ALU_INSTRUCTIONS
);
150 pc
->MaxNativeTexInstructions
= screen
->get_param(screen
, PIPE_CAP_MAX_FS_TEX_INSTRUCTIONS
);
151 pc
->MaxNativeTexIndirections
= screen
->get_param(screen
, PIPE_CAP_MAX_FS_TEX_INDIRECTIONS
);
152 pc
->MaxNativeAttribs
= screen
->get_param(screen
, PIPE_CAP_MAX_FS_INPUTS
);
153 pc
->MaxNativeTemps
= screen
->get_param(screen
, PIPE_CAP_MAX_FS_TEMPS
);
154 pc
->MaxNativeAddressRegs
= screen
->get_param(screen
, PIPE_CAP_MAX_FS_ADDRS
);
155 pc
->MaxNativeParameters
= screen
->get_param(screen
, PIPE_CAP_MAX_FS_CONSTS
);
157 pc
= &c
->VertexProgram
;
158 pc
->MaxNativeInstructions
= screen
->get_param(screen
, PIPE_CAP_MAX_VS_INSTRUCTIONS
);
159 pc
->MaxNativeAluInstructions
= screen
->get_param(screen
, PIPE_CAP_MAX_VS_ALU_INSTRUCTIONS
);
160 pc
->MaxNativeTexInstructions
= screen
->get_param(screen
, PIPE_CAP_MAX_VS_TEX_INSTRUCTIONS
);
161 pc
->MaxNativeTexIndirections
= screen
->get_param(screen
, PIPE_CAP_MAX_VS_TEX_INDIRECTIONS
);
162 pc
->MaxNativeAttribs
= screen
->get_param(screen
, PIPE_CAP_MAX_VS_INPUTS
);
163 pc
->MaxNativeTemps
= screen
->get_param(screen
, PIPE_CAP_MAX_VS_TEMPS
);
164 pc
->MaxNativeAddressRegs
= screen
->get_param(screen
, PIPE_CAP_MAX_VS_ADDRS
);
165 pc
->MaxNativeParameters
= screen
->get_param(screen
, PIPE_CAP_MAX_VS_CONSTS
);
167 /* PIPE_CAP_MAX_FS_INPUTS specifies the number of COLORn + GENERICn inputs
168 * and is set in MaxNativeAttribs. It's always 2 colors + N generic
169 * attributes. The GLSL compiler never uses COLORn for varyings, so we
170 * subtract the 2 colors to get the maximum number of varyings (generic
171 * attributes) supported by a driver. */
172 c
->MaxVarying
= screen
->get_param(screen
, PIPE_CAP_MAX_FS_INPUTS
) - 2;
173 c
->MaxVarying
= MIN2(c
->MaxVarying
, MAX_VARYING
);
178 * Use pipe_screen::get_param() to query PIPE_CAP_ values to determine
179 * which GL extensions are supported.
180 * Quite a few extensions are always supported because they are standard
181 * features or can be built on top of other gallium features.
182 * Some fine tuning may still be needed.
184 void st_init_extensions(struct st_context
*st
)
186 struct pipe_screen
*screen
= st
->pipe
->screen
;
187 GLcontext
*ctx
= st
->ctx
;
190 * Extensions that are supported by all Gallium drivers:
192 ctx
->Extensions
.ARB_copy_buffer
= GL_TRUE
;
193 ctx
->Extensions
.ARB_draw_elements_base_vertex
= GL_TRUE
;
194 ctx
->Extensions
.ARB_fragment_coord_conventions
= GL_TRUE
;
195 ctx
->Extensions
.ARB_fragment_program
= GL_TRUE
;
196 ctx
->Extensions
.ARB_map_buffer_range
= GL_TRUE
;
197 ctx
->Extensions
.ARB_multisample
= GL_TRUE
;
198 ctx
->Extensions
.ARB_texture_border_clamp
= GL_TRUE
; /* XXX temp */
199 ctx
->Extensions
.ARB_texture_compression
= GL_TRUE
;
200 ctx
->Extensions
.ARB_texture_cube_map
= GL_TRUE
;
201 ctx
->Extensions
.ARB_texture_env_combine
= GL_TRUE
;
202 ctx
->Extensions
.ARB_texture_env_crossbar
= GL_TRUE
;
203 ctx
->Extensions
.ARB_texture_env_dot3
= GL_TRUE
;
204 ctx
->Extensions
.ARB_vertex_array_object
= GL_TRUE
;
205 ctx
->Extensions
.ARB_vertex_buffer_object
= GL_TRUE
;
206 ctx
->Extensions
.ARB_vertex_program
= GL_TRUE
;
207 ctx
->Extensions
.ARB_window_pos
= GL_TRUE
;
209 ctx
->Extensions
.EXT_blend_color
= GL_TRUE
;
210 ctx
->Extensions
.EXT_blend_func_separate
= GL_TRUE
;
211 ctx
->Extensions
.EXT_blend_logic_op
= GL_TRUE
;
212 ctx
->Extensions
.EXT_blend_minmax
= GL_TRUE
;
213 ctx
->Extensions
.EXT_blend_subtract
= GL_TRUE
;
214 ctx
->Extensions
.EXT_framebuffer_blit
= GL_TRUE
;
215 ctx
->Extensions
.EXT_framebuffer_object
= GL_TRUE
;
216 ctx
->Extensions
.EXT_framebuffer_multisample
= GL_TRUE
;
217 ctx
->Extensions
.EXT_fog_coord
= GL_TRUE
;
218 ctx
->Extensions
.EXT_gpu_program_parameters
= GL_TRUE
;
219 ctx
->Extensions
.EXT_multi_draw_arrays
= GL_TRUE
;
220 ctx
->Extensions
.EXT_pixel_buffer_object
= GL_TRUE
;
221 ctx
->Extensions
.EXT_point_parameters
= GL_TRUE
;
222 ctx
->Extensions
.EXT_provoking_vertex
= GL_TRUE
;
223 ctx
->Extensions
.EXT_secondary_color
= GL_TRUE
;
224 ctx
->Extensions
.EXT_stencil_wrap
= GL_TRUE
;
225 ctx
->Extensions
.EXT_texture_env_add
= GL_TRUE
;
226 ctx
->Extensions
.EXT_texture_env_combine
= GL_TRUE
;
227 ctx
->Extensions
.EXT_texture_env_dot3
= GL_TRUE
;
228 ctx
->Extensions
.EXT_texture_lod_bias
= GL_TRUE
;
229 ctx
->Extensions
.EXT_vertex_array_bgra
= GL_TRUE
;
231 ctx
->Extensions
.APPLE_vertex_array_object
= GL_TRUE
;
233 ctx
->Extensions
.ATI_texture_env_combine3
= GL_TRUE
;
235 ctx
->Extensions
.MESA_pack_invert
= GL_TRUE
;
237 ctx
->Extensions
.NV_blend_square
= GL_TRUE
;
238 ctx
->Extensions
.NV_texgen_reflection
= GL_TRUE
;
239 ctx
->Extensions
.NV_texture_env_combine4
= GL_TRUE
;
240 ctx
->Extensions
.NV_texture_rectangle
= GL_TRUE
;
242 /* possibly could support the following two */
243 ctx
->Extensions
.NV_vertex_program
= GL_TRUE
;
244 ctx
->Extensions
.NV_vertex_program1_1
= GL_TRUE
;
247 #if FEATURE_OES_EGL_image
248 ctx
->Extensions
.OES_EGL_image
= GL_TRUE
;
250 #if FEATURE_OES_draw_texture
251 ctx
->Extensions
.OES_draw_texture
= GL_TRUE
;
254 ctx
->Extensions
.SGI_color_matrix
= GL_TRUE
;
255 ctx
->Extensions
.SGIS_generate_mipmap
= GL_TRUE
;
258 * Extensions that depend on the driver/hardware:
260 if (screen
->get_param(screen
, PIPE_CAP_MAX_RENDER_TARGETS
) > 0) {
261 ctx
->Extensions
.ARB_draw_buffers
= GL_TRUE
;
264 if (screen
->get_param(screen
, PIPE_CAP_TEXTURE_SWIZZLE
) > 0) {
265 ctx
->Extensions
.EXT_texture_swizzle
= GL_TRUE
;
268 if (screen
->get_param(screen
, PIPE_CAP_GLSL
)) {
269 ctx
->Extensions
.ARB_fragment_shader
= GL_TRUE
;
270 ctx
->Extensions
.ARB_vertex_shader
= GL_TRUE
;
271 ctx
->Extensions
.ARB_shader_objects
= GL_TRUE
;
272 ctx
->Extensions
.ARB_shading_language_100
= GL_TRUE
;
273 ctx
->Extensions
.ARB_shading_language_120
= GL_TRUE
;
276 if (screen
->get_param(screen
, PIPE_CAP_TEXTURE_MIRROR_REPEAT
) > 0) {
277 ctx
->Extensions
.ARB_texture_mirrored_repeat
= GL_TRUE
;
280 if (screen
->get_param(screen
, PIPE_CAP_BLEND_EQUATION_SEPARATE
)) {
281 ctx
->Extensions
.EXT_blend_equation_separate
= GL_TRUE
;
284 if (screen
->get_param(screen
, PIPE_CAP_TEXTURE_MIRROR_CLAMP
) > 0) {
285 ctx
->Extensions
.EXT_texture_mirror_clamp
= GL_TRUE
;
286 ctx
->Extensions
.ATI_texture_mirror_once
= GL_TRUE
;
289 if (screen
->get_param(screen
, PIPE_CAP_NPOT_TEXTURES
)) {
290 ctx
->Extensions
.ARB_texture_non_power_of_two
= GL_TRUE
;
293 if (screen
->get_param(screen
, PIPE_CAP_MAX_TEXTURE_IMAGE_UNITS
) > 1) {
294 ctx
->Extensions
.ARB_multitexture
= GL_TRUE
;
297 if (screen
->get_param(screen
, PIPE_CAP_TWO_SIDED_STENCIL
)) {
298 ctx
->Extensions
.ATI_separate_stencil
= GL_TRUE
;
299 ctx
->Extensions
.EXT_stencil_two_side
= GL_TRUE
;
302 if (screen
->get_param(screen
, PIPE_CAP_ANISOTROPIC_FILTER
)) {
303 ctx
->Extensions
.EXT_texture_filter_anisotropic
= GL_TRUE
;
306 if (screen
->get_param(screen
, PIPE_CAP_POINT_SPRITE
)) {
307 ctx
->Extensions
.ARB_point_sprite
= GL_TRUE
;
308 /* GL_NV_point_sprite is not supported by gallium because we don't
309 * support the GL_POINT_SPRITE_R_MODE_NV option.
313 if (screen
->get_param(screen
, PIPE_CAP_OCCLUSION_QUERY
)) {
314 ctx
->Extensions
.ARB_occlusion_query
= GL_TRUE
;
316 if (screen
->get_param(screen
, PIPE_CAP_TIMER_QUERY
)) {
317 ctx
->Extensions
.EXT_timer_query
= GL_TRUE
;
320 if (screen
->get_param(screen
, PIPE_CAP_TEXTURE_SHADOW_MAP
)) {
321 ctx
->Extensions
.ARB_depth_texture
= GL_TRUE
;
322 ctx
->Extensions
.ARB_fragment_program_shadow
= GL_TRUE
;
323 ctx
->Extensions
.ARB_shadow
= GL_TRUE
;
324 ctx
->Extensions
.EXT_shadow_funcs
= GL_TRUE
;
325 /*ctx->Extensions.ARB_shadow_ambient = GL_TRUE;*/
328 /* GL_EXT_packed_depth_stencil requires both the ability to render to
329 * a depth/stencil buffer and texture from depth/stencil source.
331 if (screen
->is_format_supported(screen
, PIPE_FORMAT_S8_USCALED_Z24_UNORM
,
333 PIPE_BIND_DEPTH_STENCIL
, 0) &&
334 screen
->is_format_supported(screen
, PIPE_FORMAT_S8_USCALED_Z24_UNORM
,
336 PIPE_BIND_SAMPLER_VIEW
, 0)) {
337 ctx
->Extensions
.EXT_packed_depth_stencil
= GL_TRUE
;
339 else if (screen
->is_format_supported(screen
, PIPE_FORMAT_Z24_UNORM_S8_USCALED
,
341 PIPE_BIND_DEPTH_STENCIL
, 0) &&
342 screen
->is_format_supported(screen
, PIPE_FORMAT_Z24_UNORM_S8_USCALED
,
344 PIPE_BIND_SAMPLER_VIEW
, 0)) {
345 ctx
->Extensions
.EXT_packed_depth_stencil
= GL_TRUE
;
349 if (screen
->is_format_supported(screen
, PIPE_FORMAT_A8B8G8R8_SRGB
,
351 PIPE_BIND_SAMPLER_VIEW
, 0) ||
352 screen
->is_format_supported(screen
, PIPE_FORMAT_B8G8R8A8_SRGB
,
354 PIPE_BIND_SAMPLER_VIEW
, 0)) {
355 ctx
->Extensions
.EXT_texture_sRGB
= GL_TRUE
;
359 if (screen
->is_format_supported(screen
, PIPE_FORMAT_DXT5_RGBA
,
361 PIPE_BIND_SAMPLER_VIEW
, 0) &&
363 screen
->is_format_supported(screen
, PIPE_FORMAT_DXT5_RGBA
,
365 PIPE_BIND_RENDER_TARGET
, 0))) {
366 ctx
->Extensions
.EXT_texture_compression_s3tc
= GL_TRUE
;
367 ctx
->Extensions
.S3_s3tc
= GL_TRUE
;
371 if (screen
->is_format_supported(screen
, PIPE_FORMAT_UYVY
,
373 PIPE_BIND_SAMPLER_VIEW
, 0) ||
374 screen
->is_format_supported(screen
, PIPE_FORMAT_YUYV
,
376 PIPE_BIND_SAMPLER_VIEW
, 0)) {
377 ctx
->Extensions
.MESA_ycbcr_texture
= GL_TRUE
;
380 /* GL_ARB_framebuffer_object */
381 if (ctx
->Extensions
.EXT_packed_depth_stencil
) {
382 /* we support always support GL_EXT_framebuffer_blit */
383 ctx
->Extensions
.ARB_framebuffer_object
= GL_TRUE
;
386 if (st
->pipe
->render_condition
) {
387 ctx
->Extensions
.NV_conditional_render
= GL_TRUE
;
390 if (screen
->get_param(screen
, PIPE_CAP_INDEP_BLEND_ENABLE
)) {
391 ctx
->Extensions
.EXT_draw_buffers2
= GL_TRUE
;
394 /* GL_ARB_half_float_vertex */
395 if (screen
->is_format_supported(screen
, PIPE_FORMAT_R16G16B16A16_FLOAT
,
397 PIPE_BIND_VERTEX_BUFFER
, 0)) {
398 ctx
->Extensions
.ARB_half_float_vertex
= GL_TRUE
;
402 if (screen
->get_param(screen
, PIPE_CAP_INDEP_BLEND_FUNC
)) {
403 ctx
->Extensions
.ARB_draw_buffers_blend
= GL_TRUE
;
407 if (screen
->get_param(screen
, PIPE_CAP_GEOMETRY_SHADER4
)) {
408 ctx
->Extensions
.ARB_geometry_shader4
= GL_TRUE
;
411 if (screen
->get_param(screen
, PIPE_CAP_DEPTH_CLAMP
)) {
412 ctx
->Extensions
.ARB_depth_clamp
= GL_TRUE
;