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;
72 = _min(screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_2D_LEVELS),
76 = _min(screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_3D_LEVELS),
77 MAX_3D_TEXTURE_LEVELS);
79 c->MaxCubeTextureLevels
80 = _min(screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS),
81 MAX_CUBE_TEXTURE_LEVELS);
84 = _min(1 << (c->MaxTextureLevels - 1), MAX_TEXTURE_RECT_SIZE);
86 c->MaxTextureImageUnits
87 = _min(screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_IMAGE_UNITS),
88 MAX_TEXTURE_IMAGE_UNITS);
90 c->MaxVertexTextureImageUnits
91 = _min(screen->get_param(screen, PIPE_CAP_MAX_VERTEX_TEXTURE_UNITS),
92 MAX_VERTEX_TEXTURE_IMAGE_UNITS);
94 c->MaxCombinedTextureImageUnits
95 = _min(screen->get_param(screen, PIPE_CAP_MAX_COMBINED_SAMPLERS),
96 MAX_COMBINED_TEXTURE_IMAGE_UNITS);
98 c->MaxTextureCoordUnits
99 = _min(c->MaxTextureImageUnits, MAX_TEXTURE_COORD_UNITS);
101 c->MaxTextureUnits = _min(c->MaxTextureImageUnits, c->MaxTextureCoordUnits);
104 = _clamp(screen->get_param(screen, PIPE_CAP_MAX_RENDER_TARGETS),
105 1, MAX_DRAW_BUFFERS);
108 = _maxf(1.0f, screen->get_paramf(screen, PIPE_CAP_MAX_LINE_WIDTH));
110 = _maxf(1.0f, screen->get_paramf(screen, PIPE_CAP_MAX_LINE_WIDTH_AA));
113 = _maxf(1.0f, screen->get_paramf(screen, PIPE_CAP_MAX_POINT_WIDTH));
115 = _maxf(1.0f, screen->get_paramf(screen, PIPE_CAP_MAX_POINT_WIDTH_AA));
116 /* called after _mesa_create_context/_mesa_init_point, fix default user
117 * settable max point size up
119 st->ctx->Point.MaxSize = MAX2(c->MaxPointSize, c->MaxPointSizeAA);
120 /* these are not queryable. Note that GL basically mandates a 1.0 minimum
121 * for non-aa sizes, but we can go down to 0.0 for aa points.
123 c->MinPointSize = 1.0f;
124 c->MinPointSizeAA = 0.0f;
126 c->MaxTextureMaxAnisotropy
127 = _maxf(2.0f, screen->get_paramf(screen, PIPE_CAP_MAX_TEXTURE_ANISOTROPY));
130 = screen->get_paramf(screen, PIPE_CAP_MAX_TEXTURE_LOD_BIAS);
133 = CLAMP(screen->get_param(screen, PIPE_CAP_MAX_RENDER_TARGETS),
134 1, MAX_DRAW_BUFFERS);
136 /* Is TGSI_OPCODE_CONT supported? */
137 /* XXX separate query for early function return? */
138 st->ctx->Shader.EmitContReturn =
139 screen->get_param(screen, PIPE_CAP_TGSI_CONT_SUPPORTED);
144 * Use pipe_screen::get_param() to query PIPE_CAP_ values to determine
145 * which GL extensions are supported.
146 * Quite a few extensions are always supported because they are standard
147 * features or can be built on top of other gallium features.
148 * Some fine tuning may still be needed.
150 void st_init_extensions(struct st_context *st)
152 struct pipe_screen *screen = st->pipe->screen;
153 GLcontext *ctx = st->ctx;
156 * 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;
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 ctx->Extensions.ARB_texture_cube_map = GL_TRUE;
166 ctx->Extensions.ARB_texture_env_combine = GL_TRUE;
167 ctx->Extensions.ARB_texture_env_crossbar = GL_TRUE;
168 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;
171 ctx->Extensions.ARB_vertex_program = GL_TRUE;
173 ctx->Extensions.EXT_blend_color = GL_TRUE;
174 ctx->Extensions.EXT_blend_func_separate = GL_TRUE;
175 ctx->Extensions.EXT_blend_logic_op = GL_TRUE;
176 ctx->Extensions.EXT_blend_minmax = GL_TRUE;
177 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 ctx->Extensions.EXT_fog_coord = GL_TRUE;
182 ctx->Extensions.EXT_multi_draw_arrays = GL_TRUE;
183 ctx->Extensions.EXT_pixel_buffer_object = GL_TRUE;
184 ctx->Extensions.EXT_point_parameters = GL_TRUE;
185 ctx->Extensions.EXT_provoking_vertex = GL_TRUE;
186 ctx->Extensions.EXT_secondary_color = GL_TRUE;
187 ctx->Extensions.EXT_stencil_wrap = GL_TRUE;
188 ctx->Extensions.EXT_texture_env_add = GL_TRUE;
189 ctx->Extensions.EXT_texture_env_combine = GL_TRUE;
190 ctx->Extensions.EXT_texture_env_dot3 = GL_TRUE;
191 ctx->Extensions.EXT_texture_lod_bias = GL_TRUE;
192 ctx->Extensions.EXT_vertex_array_bgra = GL_TRUE;
194 ctx->Extensions.APPLE_vertex_array_object = GL_TRUE;
196 ctx->Extensions.NV_blend_square = GL_TRUE;
197 ctx->Extensions.NV_texgen_reflection = GL_TRUE;
198 ctx->Extensions.NV_texture_env_combine4 = GL_TRUE;
200 #if FEATURE_OES_draw_texture
201 ctx->Extensions.OES_draw_texture = GL_TRUE;
204 ctx->Extensions.SGI_color_matrix = GL_TRUE;
205 ctx->Extensions.SGIS_generate_mipmap = GL_TRUE;
208 * Extensions that depend on the driver/hardware:
210 if (screen->get_param(screen, PIPE_CAP_MAX_RENDER_TARGETS) > 0) {
211 ctx->Extensions.ARB_draw_buffers = GL_TRUE;
214 if (screen->get_param(screen, PIPE_CAP_GLSL)) {
215 ctx->Extensions.ARB_fragment_shader = GL_TRUE;
216 ctx->Extensions.ARB_vertex_shader = GL_TRUE;
217 ctx->Extensions.ARB_shader_objects = GL_TRUE;
218 ctx->Extensions.ARB_shading_language_100 = GL_TRUE;
219 ctx->Extensions.ARB_shading_language_120 = GL_TRUE;
222 if (screen->get_param(screen, PIPE_CAP_TEXTURE_MIRROR_REPEAT) > 0) {
223 ctx->Extensions.ARB_texture_mirrored_repeat = GL_TRUE;
226 if (screen->get_param(screen, PIPE_CAP_BLEND_EQUATION_SEPARATE)) {
227 ctx->Extensions.EXT_blend_equation_separate = GL_TRUE;
230 if (screen->get_param(screen, PIPE_CAP_TEXTURE_MIRROR_CLAMP) > 0) {
231 ctx->Extensions.EXT_texture_mirror_clamp = GL_TRUE;
234 if (screen->get_param(screen, PIPE_CAP_NPOT_TEXTURES)) {
235 ctx->Extensions.ARB_texture_non_power_of_two = GL_TRUE;
236 ctx->Extensions.NV_texture_rectangle = GL_TRUE;
239 if (screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_IMAGE_UNITS) > 1) {
240 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;
248 if (screen->get_param(screen, PIPE_CAP_ANISOTROPIC_FILTER)) {
249 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 /* GL_NV_point_sprite is not supported by gallium because we don't
255 * support the GL_POINT_SPRITE_R_MODE_NV option.
259 if (screen->get_param(screen, PIPE_CAP_OCCLUSION_QUERY)) {
260 ctx->Extensions.ARB_occlusion_query = GL_TRUE;
263 if (screen->get_param(screen, PIPE_CAP_TEXTURE_SHADOW_MAP)) {
264 ctx->Extensions.ARB_depth_texture = GL_TRUE;
265 ctx->Extensions.ARB_shadow = GL_TRUE;
266 ctx->Extensions.EXT_shadow_funcs = GL_TRUE;
267 /*ctx->Extensions.ARB_shadow_ambient = GL_TRUE;*/
270 /* GL_EXT_packed_depth_stencil requires both the ability to render to
271 * a depth/stencil buffer and texture from depth/stencil source.
273 if (screen->is_format_supported(screen, PIPE_FORMAT_Z24S8_UNORM,
275 PIPE_TEXTURE_USAGE_DEPTH_STENCIL, 0) &&
276 screen->is_format_supported(screen, PIPE_FORMAT_Z24S8_UNORM,
278 PIPE_TEXTURE_USAGE_SAMPLER, 0)) {
279 ctx->Extensions.EXT_packed_depth_stencil = GL_TRUE;
281 else if (screen->is_format_supported(screen, PIPE_FORMAT_S8Z24_UNORM,
283 PIPE_TEXTURE_USAGE_DEPTH_STENCIL, 0) &&
284 screen->is_format_supported(screen, PIPE_FORMAT_S8Z24_UNORM,
286 PIPE_TEXTURE_USAGE_SAMPLER, 0)) {
287 ctx->Extensions.EXT_packed_depth_stencil = GL_TRUE;
291 if (screen->is_format_supported(screen, PIPE_FORMAT_R8G8B8A8_SRGB,
293 PIPE_TEXTURE_USAGE_SAMPLER, 0) ||
294 screen->is_format_supported(screen, PIPE_FORMAT_A8R8G8B8_SRGB,
296 PIPE_TEXTURE_USAGE_SAMPLER, 0)) {
297 ctx->Extensions.EXT_texture_sRGB = GL_TRUE;
301 if (screen->is_format_supported(screen, PIPE_FORMAT_DXT5_RGBA,
303 PIPE_TEXTURE_USAGE_SAMPLER, 0)) {
304 ctx->Extensions.EXT_texture_compression_s3tc = GL_TRUE;
305 ctx->Extensions.S3_s3tc = GL_TRUE;
309 if (screen->is_format_supported(screen, PIPE_FORMAT_YCBCR,
311 PIPE_TEXTURE_USAGE_SAMPLER, 0) ||
312 screen->is_format_supported(screen, PIPE_FORMAT_YCBCR_REV,
314 PIPE_TEXTURE_USAGE_SAMPLER, 0)) {
315 ctx->Extensions.MESA_ycbcr_texture = GL_TRUE;
318 /* GL_ARB_framebuffer_object */
319 if (ctx->Extensions.EXT_packed_depth_stencil) {
320 /* we support always support GL_EXT_framebuffer_blit */
321 ctx->Extensions.ARB_framebuffer_object = GL_TRUE;
324 if (st->pipe->render_condition) {
325 ctx->Extensions.NV_conditional_render = GL_TRUE;
328 if (screen->get_param(screen, PIPE_CAP_INDEP_BLEND_ENABLE)) {
329 ctx->Extensions.EXT_draw_buffers2 = GL_TRUE;
333 if (screen->get_param(screen, PIPE_CAP_INDEP_BLEND_FUNC)) {
334 ctx->Extensions.ARB_draw_buffers_blend = GL_TRUE;