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(i = 0; i < MESA_SHADER_TYPES; ++i) {
141 struct gl_shader_compiler_options *options = &st->ctx->ShaderCompilerOptions[i];
142 struct gl_program_constants *pc;
145 case PIPE_SHADER_FRAGMENT:
146 pc = &c->FragmentProgram;
148 case PIPE_SHADER_VERTEX:
149 pc = &c->VertexProgram;
151 case PIPE_SHADER_GEOMETRY:
152 pc = &c->GeometryProgram;
159 pc->MaxNativeInstructions = screen->get_shader_param(screen, i, PIPE_SHADER_CAP_MAX_INSTRUCTIONS);
160 pc->MaxNativeAluInstructions = screen->get_shader_param(screen, i, PIPE_SHADER_CAP_MAX_ALU_INSTRUCTIONS);
161 pc->MaxNativeTexInstructions = screen->get_shader_param(screen, i, PIPE_SHADER_CAP_MAX_TEX_INSTRUCTIONS);
162 pc->MaxNativeTexIndirections = screen->get_shader_param(screen, i, PIPE_SHADER_CAP_MAX_TEX_INDIRECTIONS);
163 pc->MaxNativeAttribs = screen->get_shader_param(screen, i, PIPE_SHADER_CAP_MAX_INPUTS);
164 pc->MaxNativeTemps = screen->get_shader_param(screen, i, PIPE_SHADER_CAP_MAX_TEMPS);
165 pc->MaxNativeAddressRegs = screen->get_shader_param(screen, i, PIPE_SHADER_CAP_MAX_ADDRS);
166 pc->MaxNativeParameters = screen->get_shader_param(screen, i, PIPE_SHADER_CAP_MAX_CONSTS);
168 options->EmitNoNoise = TRUE;
170 /* TODO: make these more fine-grained if anyone needs it */
171 options->EmitNoIfs = !screen->get_shader_param(screen, i, PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH);
172 options->EmitNoFunctions = !screen->get_shader_param(screen, i, PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH);
173 options->EmitNoLoops = !screen->get_shader_param(screen, i, PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH);
174 options->EmitNoMainReturn = !screen->get_shader_param(screen, i, PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH);
176 options->EmitNoCont = !screen->get_shader_param(screen, i, PIPE_SHADER_CAP_TGSI_CONT_SUPPORTED);
178 if(options->EmitNoLoops)
179 options->MaxUnrollIterations = MIN2(screen->get_shader_param(screen, i, PIPE_SHADER_CAP_MAX_INSTRUCTIONS), 65536);
182 /* PIPE_CAP_MAX_FS_INPUTS specifies the number of COLORn + GENERICn inputs
183 * and is set in MaxNativeAttribs. It's always 2 colors + N generic
184 * attributes. The GLSL compiler never uses COLORn for varyings, so we
185 * subtract the 2 colors to get the maximum number of varyings (generic
186 * attributes) supported by a driver. */
187 c->MaxVarying = screen->get_shader_param(screen, PIPE_SHADER_FRAGMENT, PIPE_SHADER_CAP_MAX_INPUTS) - 2;
188 c->MaxVarying = MIN2(c->MaxVarying, MAX_VARYING);
190 /* XXX we'll need a better query here someday */
191 if (screen->get_param(screen, PIPE_CAP_GLSL)) {
192 c->GLSLVersion = 120;
198 * Use pipe_screen::get_param() to query PIPE_CAP_ values to determine
199 * which GL extensions are supported.
200 * Quite a few extensions are always supported because they are standard
201 * features or can be built on top of other gallium features.
202 * Some fine tuning may still be needed.
204 void st_init_extensions(struct st_context *st)
206 struct pipe_screen *screen = st->pipe->screen;
207 GLcontext *ctx = st->ctx;
210 * Extensions that are supported by all Gallium drivers:
212 ctx->Extensions.ARB_copy_buffer = GL_TRUE;
213 ctx->Extensions.ARB_draw_elements_base_vertex = GL_TRUE;
214 ctx->Extensions.ARB_fragment_coord_conventions = GL_TRUE;
215 ctx->Extensions.ARB_fragment_program = GL_TRUE;
216 ctx->Extensions.ARB_map_buffer_range = GL_TRUE;
217 ctx->Extensions.ARB_multisample = GL_TRUE;
218 ctx->Extensions.ARB_texture_border_clamp = GL_TRUE; /* XXX temp */
219 ctx->Extensions.ARB_texture_compression = GL_TRUE;
220 ctx->Extensions.ARB_texture_cube_map = GL_TRUE;
221 ctx->Extensions.ARB_texture_env_combine = GL_TRUE;
222 ctx->Extensions.ARB_texture_env_crossbar = GL_TRUE;
223 ctx->Extensions.ARB_texture_env_dot3 = GL_TRUE;
224 ctx->Extensions.ARB_vertex_array_object = GL_TRUE;
225 ctx->Extensions.ARB_vertex_buffer_object = GL_TRUE;
226 ctx->Extensions.ARB_vertex_program = GL_TRUE;
227 ctx->Extensions.ARB_window_pos = GL_TRUE;
229 ctx->Extensions.EXT_blend_color = GL_TRUE;
230 ctx->Extensions.EXT_blend_func_separate = GL_TRUE;
231 ctx->Extensions.EXT_blend_logic_op = GL_TRUE;
232 ctx->Extensions.EXT_blend_minmax = GL_TRUE;
233 ctx->Extensions.EXT_blend_subtract = GL_TRUE;
234 ctx->Extensions.EXT_framebuffer_blit = GL_TRUE;
235 ctx->Extensions.EXT_framebuffer_object = GL_TRUE;
236 ctx->Extensions.EXT_framebuffer_multisample = GL_TRUE;
237 ctx->Extensions.EXT_fog_coord = GL_TRUE;
238 ctx->Extensions.EXT_gpu_program_parameters = GL_TRUE;
239 ctx->Extensions.EXT_multi_draw_arrays = GL_TRUE;
240 ctx->Extensions.EXT_pixel_buffer_object = GL_TRUE;
241 ctx->Extensions.EXT_point_parameters = GL_TRUE;
242 ctx->Extensions.EXT_provoking_vertex = GL_TRUE;
243 ctx->Extensions.EXT_secondary_color = GL_TRUE;
244 ctx->Extensions.EXT_stencil_wrap = GL_TRUE;
245 ctx->Extensions.EXT_texture_env_add = GL_TRUE;
246 ctx->Extensions.EXT_texture_env_combine = GL_TRUE;
247 ctx->Extensions.EXT_texture_env_dot3 = GL_TRUE;
248 ctx->Extensions.EXT_texture_lod_bias = GL_TRUE;
249 ctx->Extensions.EXT_vertex_array_bgra = GL_TRUE;
251 ctx->Extensions.APPLE_vertex_array_object = GL_TRUE;
253 ctx->Extensions.ATI_texture_env_combine3 = GL_TRUE;
255 ctx->Extensions.MESA_pack_invert = GL_TRUE;
257 ctx->Extensions.NV_blend_square = GL_TRUE;
258 ctx->Extensions.NV_texgen_reflection = GL_TRUE;
259 ctx->Extensions.NV_texture_env_combine4 = GL_TRUE;
260 ctx->Extensions.NV_texture_rectangle = GL_TRUE;
262 /* possibly could support the following two */
263 ctx->Extensions.NV_vertex_program = GL_TRUE;
264 ctx->Extensions.NV_vertex_program1_1 = GL_TRUE;
267 #if FEATURE_OES_EGL_image
268 ctx->Extensions.OES_EGL_image = GL_TRUE;
270 #if FEATURE_OES_draw_texture
271 ctx->Extensions.OES_draw_texture = GL_TRUE;
274 ctx->Extensions.SGIS_generate_mipmap = GL_TRUE;
277 * Extensions that depend on the driver/hardware:
279 if (screen->get_param(screen, PIPE_CAP_MAX_RENDER_TARGETS) > 0) {
280 ctx->Extensions.ARB_draw_buffers = GL_TRUE;
283 if (screen->get_param(screen, PIPE_CAP_TEXTURE_SWIZZLE) > 0) {
284 ctx->Extensions.EXT_texture_swizzle = GL_TRUE;
287 if (screen->get_param(screen, PIPE_CAP_GLSL)) {
288 ctx->Extensions.ARB_fragment_shader = GL_TRUE;
289 ctx->Extensions.ARB_vertex_shader = GL_TRUE;
290 ctx->Extensions.ARB_shader_objects = GL_TRUE;
291 ctx->Extensions.ARB_shading_language_100 = GL_TRUE;
294 if (screen->get_param(screen, PIPE_CAP_TEXTURE_MIRROR_REPEAT) > 0) {
295 ctx->Extensions.ARB_texture_mirrored_repeat = GL_TRUE;
298 if (screen->get_param(screen, PIPE_CAP_BLEND_EQUATION_SEPARATE)) {
299 ctx->Extensions.EXT_blend_equation_separate = GL_TRUE;
302 if (screen->get_param(screen, PIPE_CAP_TEXTURE_MIRROR_CLAMP) > 0) {
303 ctx->Extensions.EXT_texture_mirror_clamp = GL_TRUE;
304 ctx->Extensions.ATI_texture_mirror_once = GL_TRUE;
307 if (screen->get_param(screen, PIPE_CAP_NPOT_TEXTURES)) {
308 ctx->Extensions.ARB_texture_non_power_of_two = GL_TRUE;
311 if (screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_IMAGE_UNITS) > 1) {
312 ctx->Extensions.ARB_multitexture = GL_TRUE;
315 if (screen->get_param(screen, PIPE_CAP_TWO_SIDED_STENCIL)) {
316 ctx->Extensions.ATI_separate_stencil = GL_TRUE;
317 ctx->Extensions.EXT_stencil_two_side = GL_TRUE;
320 if (screen->get_param(screen, PIPE_CAP_ANISOTROPIC_FILTER)) {
321 ctx->Extensions.EXT_texture_filter_anisotropic = GL_TRUE;
324 if (screen->get_param(screen, PIPE_CAP_POINT_SPRITE)) {
325 ctx->Extensions.ARB_point_sprite = GL_TRUE;
326 /* GL_NV_point_sprite is not supported by gallium because we don't
327 * support the GL_POINT_SPRITE_R_MODE_NV option.
331 if (screen->get_param(screen, PIPE_CAP_OCCLUSION_QUERY)) {
332 ctx->Extensions.ARB_occlusion_query = GL_TRUE;
334 if (screen->get_param(screen, PIPE_CAP_TIMER_QUERY)) {
335 ctx->Extensions.EXT_timer_query = GL_TRUE;
338 if (screen->get_param(screen, PIPE_CAP_TEXTURE_SHADOW_MAP)) {
339 ctx->Extensions.ARB_depth_texture = GL_TRUE;
340 ctx->Extensions.ARB_fragment_program_shadow = GL_TRUE;
341 ctx->Extensions.ARB_shadow = GL_TRUE;
342 ctx->Extensions.EXT_shadow_funcs = GL_TRUE;
343 /*ctx->Extensions.ARB_shadow_ambient = GL_TRUE;*/
346 /* GL_EXT_packed_depth_stencil requires both the ability to render to
347 * a depth/stencil buffer and texture from depth/stencil source.
349 if (screen->is_format_supported(screen, PIPE_FORMAT_S8_USCALED_Z24_UNORM,
351 PIPE_BIND_DEPTH_STENCIL, 0) &&
352 screen->is_format_supported(screen, PIPE_FORMAT_S8_USCALED_Z24_UNORM,
354 PIPE_BIND_SAMPLER_VIEW, 0)) {
355 ctx->Extensions.EXT_packed_depth_stencil = GL_TRUE;
357 else if (screen->is_format_supported(screen, PIPE_FORMAT_Z24_UNORM_S8_USCALED,
359 PIPE_BIND_DEPTH_STENCIL, 0) &&
360 screen->is_format_supported(screen, PIPE_FORMAT_Z24_UNORM_S8_USCALED,
362 PIPE_BIND_SAMPLER_VIEW, 0)) {
363 ctx->Extensions.EXT_packed_depth_stencil = GL_TRUE;
367 if (screen->is_format_supported(screen, PIPE_FORMAT_A8B8G8R8_SRGB,
369 PIPE_BIND_SAMPLER_VIEW, 0) ||
370 screen->is_format_supported(screen, PIPE_FORMAT_B8G8R8A8_SRGB,
372 PIPE_BIND_SAMPLER_VIEW, 0)) {
373 ctx->Extensions.EXT_texture_sRGB = GL_TRUE;
376 if (screen->is_format_supported(screen, PIPE_FORMAT_R8G8_UNORM,
378 PIPE_BIND_SAMPLER_VIEW, 0)) {
379 ctx->Extensions.ARB_texture_rg = GL_TRUE;
383 if (screen->is_format_supported(screen, PIPE_FORMAT_DXT5_RGBA,
385 PIPE_BIND_SAMPLER_VIEW, 0) &&
387 screen->is_format_supported(screen, PIPE_FORMAT_DXT5_RGBA,
389 PIPE_BIND_RENDER_TARGET, 0))) {
390 ctx->Extensions.EXT_texture_compression_s3tc = GL_TRUE;
391 ctx->Extensions.S3_s3tc = GL_TRUE;
395 if (screen->is_format_supported(screen, PIPE_FORMAT_UYVY,
397 PIPE_BIND_SAMPLER_VIEW, 0) ||
398 screen->is_format_supported(screen, PIPE_FORMAT_YUYV,
400 PIPE_BIND_SAMPLER_VIEW, 0)) {
401 ctx->Extensions.MESA_ycbcr_texture = GL_TRUE;
404 /* GL_ARB_framebuffer_object */
405 if (ctx->Extensions.EXT_packed_depth_stencil) {
406 /* we support always support GL_EXT_framebuffer_blit */
407 ctx->Extensions.ARB_framebuffer_object = GL_TRUE;
410 if (st->pipe->render_condition) {
411 ctx->Extensions.NV_conditional_render = GL_TRUE;
414 if (screen->get_param(screen, PIPE_CAP_INDEP_BLEND_ENABLE)) {
415 ctx->Extensions.EXT_draw_buffers2 = GL_TRUE;
418 /* GL_ARB_half_float_vertex */
419 if (screen->is_format_supported(screen, PIPE_FORMAT_R16G16B16A16_FLOAT,
421 PIPE_BIND_VERTEX_BUFFER, 0)) {
422 ctx->Extensions.ARB_half_float_vertex = GL_TRUE;
426 if (screen->get_param(screen, PIPE_CAP_INDEP_BLEND_FUNC)) {
427 ctx->Extensions.ARB_draw_buffers_blend = GL_TRUE;
431 if (screen->get_shader_param(screen, PIPE_SHADER_GEOMETRY, PIPE_SHADER_CAP_MAX_INSTRUCTIONS) > 0) {
432 ctx->Extensions.ARB_geometry_shader4 = GL_TRUE;
435 if (screen->get_param(screen, PIPE_CAP_DEPTH_CLAMP)) {
436 ctx->Extensions.ARB_depth_clamp = GL_TRUE;