Merge branch 'mesa_7_7_branch'
[mesa.git] / src / mesa / state_tracker / st_extensions.c
1 /**************************************************************************
2 *
3 * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
4 * Copyright (c) 2008 VMware, Inc.
5 * All Rights Reserved.
6 *
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:
14 *
15 * The above copyright notice and this permission notice (including the
16 * next paragraph) shall be included in all copies or substantial portions
17 * of the Software.
18 *
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.
26 *
27 **************************************************************************/
28
29 #include "main/imports.h"
30 #include "main/context.h"
31 #include "main/extensions.h"
32 #include "main/macros.h"
33
34 #include "pipe/p_context.h"
35 #include "pipe/p_defines.h"
36 #include "pipe/p_screen.h"
37
38 #include "st_context.h"
39 #include "st_extensions.h"
40
41
42 static int _min(int a, int b)
43 {
44 return (a < b) ? a : b;
45 }
46
47 static float _maxf(float a, float b)
48 {
49 return (a > b) ? a : b;
50 }
51
52 static int _clamp(int a, int min, int max)
53 {
54 if (a < min)
55 return min;
56 else if (a > max)
57 return max;
58 else
59 return a;
60 }
61
62
63 /**
64 * Query driver to get implementation limits.
65 * Note that we have to limit/clamp against Mesa's internal limits too.
66 */
67 void st_init_limits(struct st_context *st)
68 {
69 struct pipe_screen *screen = st->pipe->screen;
70 struct gl_constants *c = &st->ctx->Const;
71
72 c->MaxTextureLevels
73 = _min(screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_2D_LEVELS),
74 MAX_TEXTURE_LEVELS);
75
76 c->Max3DTextureLevels
77 = _min(screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_3D_LEVELS),
78 MAX_3D_TEXTURE_LEVELS);
79
80 c->MaxCubeTextureLevels
81 = _min(screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS),
82 MAX_CUBE_TEXTURE_LEVELS);
83
84 c->MaxTextureRectSize
85 = _min(1 << (c->MaxTextureLevels - 1), MAX_TEXTURE_RECT_SIZE);
86
87 c->MaxTextureImageUnits
88 = _min(screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_IMAGE_UNITS),
89 MAX_TEXTURE_IMAGE_UNITS);
90
91 c->MaxVertexTextureImageUnits
92 = _min(screen->get_param(screen, PIPE_CAP_MAX_VERTEX_TEXTURE_UNITS),
93 MAX_VERTEX_TEXTURE_IMAGE_UNITS);
94
95 c->MaxCombinedTextureImageUnits
96 = _min(screen->get_param(screen, PIPE_CAP_MAX_COMBINED_SAMPLERS),
97 MAX_COMBINED_TEXTURE_IMAGE_UNITS);
98
99 c->MaxTextureCoordUnits
100 = _min(c->MaxTextureImageUnits, MAX_TEXTURE_COORD_UNITS);
101
102 c->MaxTextureUnits = _min(c->MaxTextureImageUnits, c->MaxTextureCoordUnits);
103
104 c->MaxDrawBuffers
105 = _clamp(screen->get_param(screen, PIPE_CAP_MAX_RENDER_TARGETS),
106 1, MAX_DRAW_BUFFERS);
107
108 c->MaxLineWidth
109 = _maxf(1.0f, screen->get_paramf(screen, PIPE_CAP_MAX_LINE_WIDTH));
110 c->MaxLineWidthAA
111 = _maxf(1.0f, screen->get_paramf(screen, PIPE_CAP_MAX_LINE_WIDTH_AA));
112
113 c->MaxPointSize
114 = _maxf(1.0f, screen->get_paramf(screen, PIPE_CAP_MAX_POINT_WIDTH));
115 c->MaxPointSizeAA
116 = _maxf(1.0f, screen->get_paramf(screen, PIPE_CAP_MAX_POINT_WIDTH_AA));
117
118 c->MaxTextureMaxAnisotropy
119 = _maxf(2.0f, screen->get_paramf(screen, PIPE_CAP_MAX_TEXTURE_ANISOTROPY));
120
121 c->MaxTextureLodBias
122 = screen->get_paramf(screen, PIPE_CAP_MAX_TEXTURE_LOD_BIAS);
123
124 c->MaxDrawBuffers
125 = CLAMP(screen->get_param(screen, PIPE_CAP_MAX_RENDER_TARGETS),
126 1, MAX_DRAW_BUFFERS);
127
128 /* Is TGSI_OPCODE_CONT supported? */
129 /* XXX separate query for early function return? */
130 st->ctx->Shader.EmitContReturn =
131 screen->get_param(screen, PIPE_CAP_TGSI_CONT_SUPPORTED);
132 }
133
134
135 /**
136 * Use pipe_screen::get_param() to query PIPE_CAP_ values to determine
137 * which GL extensions are supported.
138 * Quite a few extensions are always supported because they are standard
139 * features or can be built on top of other gallium features.
140 * Some fine tuning may still be needed.
141 */
142 void st_init_extensions(struct st_context *st)
143 {
144 struct pipe_screen *screen = st->pipe->screen;
145 GLcontext *ctx = st->ctx;
146
147 /*
148 * Extensions that are supported by all Gallium drivers:
149 */
150 ctx->Extensions.ARB_copy_buffer = GL_TRUE;
151 ctx->Extensions.ARB_fragment_program = GL_TRUE;
152 ctx->Extensions.ARB_map_buffer_range = GL_TRUE;
153 ctx->Extensions.ARB_multisample = GL_TRUE;
154 ctx->Extensions.ARB_texture_border_clamp = GL_TRUE; /* XXX temp */
155 ctx->Extensions.ARB_texture_compression = GL_TRUE;
156 ctx->Extensions.ARB_texture_cube_map = GL_TRUE;
157 ctx->Extensions.ARB_texture_env_combine = GL_TRUE;
158 ctx->Extensions.ARB_texture_env_crossbar = GL_TRUE;
159 ctx->Extensions.ARB_texture_env_dot3 = GL_TRUE;
160 ctx->Extensions.ARB_vertex_array_object = GL_TRUE;
161 ctx->Extensions.ARB_vertex_buffer_object = GL_TRUE;
162 ctx->Extensions.ARB_vertex_program = GL_TRUE;
163
164 ctx->Extensions.EXT_blend_color = GL_TRUE;
165 ctx->Extensions.EXT_blend_func_separate = GL_TRUE;
166 ctx->Extensions.EXT_blend_logic_op = GL_TRUE;
167 ctx->Extensions.EXT_blend_minmax = GL_TRUE;
168 ctx->Extensions.EXT_blend_subtract = GL_TRUE;
169 ctx->Extensions.EXT_framebuffer_blit = GL_TRUE;
170 ctx->Extensions.EXT_framebuffer_object = GL_TRUE;
171 ctx->Extensions.EXT_fog_coord = GL_TRUE;
172 ctx->Extensions.EXT_multi_draw_arrays = GL_TRUE;
173 ctx->Extensions.EXT_pixel_buffer_object = GL_TRUE;
174 ctx->Extensions.EXT_point_parameters = GL_TRUE;
175 ctx->Extensions.EXT_provoking_vertex = GL_TRUE;
176 ctx->Extensions.EXT_secondary_color = GL_TRUE;
177 ctx->Extensions.EXT_stencil_wrap = GL_TRUE;
178 ctx->Extensions.EXT_texture_env_add = GL_TRUE;
179 ctx->Extensions.EXT_texture_env_combine = GL_TRUE;
180 ctx->Extensions.EXT_texture_env_dot3 = GL_TRUE;
181 ctx->Extensions.EXT_texture_lod_bias = GL_TRUE;
182 ctx->Extensions.EXT_vertex_array_bgra = GL_TRUE;
183
184 ctx->Extensions.APPLE_vertex_array_object = GL_TRUE;
185
186 ctx->Extensions.NV_blend_square = GL_TRUE;
187 ctx->Extensions.NV_texgen_reflection = GL_TRUE;
188 ctx->Extensions.NV_texture_env_combine4 = GL_TRUE;
189
190 ctx->Extensions.SGI_color_matrix = GL_TRUE;
191 ctx->Extensions.SGIS_generate_mipmap = GL_TRUE;
192
193 /*
194 * Extensions that depend on the driver/hardware:
195 */
196 if (screen->get_param(screen, PIPE_CAP_MAX_RENDER_TARGETS) > 0) {
197 ctx->Extensions.ARB_draw_buffers = GL_TRUE;
198 }
199
200 if (screen->get_param(screen, PIPE_CAP_GLSL)) {
201 ctx->Extensions.ARB_fragment_shader = GL_TRUE;
202 ctx->Extensions.ARB_vertex_shader = GL_TRUE;
203 ctx->Extensions.ARB_shader_objects = GL_TRUE;
204 ctx->Extensions.ARB_shading_language_100 = GL_TRUE;
205 ctx->Extensions.ARB_shading_language_120 = GL_TRUE;
206 }
207
208 if (screen->get_param(screen, PIPE_CAP_TEXTURE_MIRROR_REPEAT) > 0) {
209 ctx->Extensions.ARB_texture_mirrored_repeat = GL_TRUE;
210 }
211
212 if (screen->get_param(screen, PIPE_CAP_BLEND_EQUATION_SEPARATE)) {
213 ctx->Extensions.EXT_blend_equation_separate = GL_TRUE;
214 }
215
216 if (screen->get_param(screen, PIPE_CAP_TEXTURE_MIRROR_CLAMP) > 0) {
217 ctx->Extensions.EXT_texture_mirror_clamp = GL_TRUE;
218 }
219
220 if (screen->get_param(screen, PIPE_CAP_NPOT_TEXTURES)) {
221 ctx->Extensions.ARB_texture_non_power_of_two = GL_TRUE;
222 ctx->Extensions.NV_texture_rectangle = GL_TRUE;
223 }
224
225 if (screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_IMAGE_UNITS) > 1) {
226 ctx->Extensions.ARB_multitexture = GL_TRUE;
227 }
228
229 if (screen->get_param(screen, PIPE_CAP_TWO_SIDED_STENCIL)) {
230 ctx->Extensions.ATI_separate_stencil = GL_TRUE;
231 ctx->Extensions.EXT_stencil_two_side = GL_TRUE;
232 }
233
234 if (screen->get_param(screen, PIPE_CAP_ANISOTROPIC_FILTER)) {
235 ctx->Extensions.EXT_texture_filter_anisotropic = GL_TRUE;
236 }
237
238 if (screen->get_param(screen, PIPE_CAP_POINT_SPRITE)) {
239 ctx->Extensions.ARB_point_sprite = GL_TRUE;
240 /* GL_NV_point_sprite is not supported by gallium because we don't
241 * support the GL_POINT_SPRITE_R_MODE_NV option.
242 */
243 }
244
245 if (screen->get_param(screen, PIPE_CAP_OCCLUSION_QUERY)) {
246 ctx->Extensions.ARB_occlusion_query = GL_TRUE;
247 }
248
249 if (screen->get_param(screen, PIPE_CAP_TEXTURE_SHADOW_MAP)) {
250 ctx->Extensions.ARB_depth_texture = GL_TRUE;
251 ctx->Extensions.ARB_shadow = GL_TRUE;
252 ctx->Extensions.EXT_shadow_funcs = GL_TRUE;
253 /*ctx->Extensions.ARB_shadow_ambient = GL_TRUE;*/
254 }
255
256 /* GL_EXT_packed_depth_stencil requires both the ability to render to
257 * a depth/stencil buffer and texture from depth/stencil source.
258 */
259 if (screen->is_format_supported(screen, PIPE_FORMAT_Z24S8_UNORM,
260 PIPE_TEXTURE_2D,
261 PIPE_TEXTURE_USAGE_DEPTH_STENCIL, 0) &&
262 screen->is_format_supported(screen, PIPE_FORMAT_Z24S8_UNORM,
263 PIPE_TEXTURE_2D,
264 PIPE_TEXTURE_USAGE_SAMPLER, 0)) {
265 ctx->Extensions.EXT_packed_depth_stencil = GL_TRUE;
266 }
267 else if (screen->is_format_supported(screen, PIPE_FORMAT_S8Z24_UNORM,
268 PIPE_TEXTURE_2D,
269 PIPE_TEXTURE_USAGE_DEPTH_STENCIL, 0) &&
270 screen->is_format_supported(screen, PIPE_FORMAT_S8Z24_UNORM,
271 PIPE_TEXTURE_2D,
272 PIPE_TEXTURE_USAGE_SAMPLER, 0)) {
273 ctx->Extensions.EXT_packed_depth_stencil = GL_TRUE;
274 }
275
276 /* sRGB support */
277 if (screen->is_format_supported(screen, PIPE_FORMAT_R8G8B8A8_SRGB,
278 PIPE_TEXTURE_2D,
279 PIPE_TEXTURE_USAGE_SAMPLER, 0) ||
280 screen->is_format_supported(screen, PIPE_FORMAT_A8R8G8B8_SRGB,
281 PIPE_TEXTURE_2D,
282 PIPE_TEXTURE_USAGE_SAMPLER, 0)) {
283 ctx->Extensions.EXT_texture_sRGB = GL_TRUE;
284 }
285
286 /* s3tc support */
287 if (screen->is_format_supported(screen, PIPE_FORMAT_DXT5_RGBA,
288 PIPE_TEXTURE_2D,
289 PIPE_TEXTURE_USAGE_SAMPLER, 0)) {
290 ctx->Extensions.EXT_texture_compression_s3tc = GL_TRUE;
291 ctx->Extensions.S3_s3tc = GL_TRUE;
292 }
293
294 /* ycbcr support */
295 if (screen->is_format_supported(screen, PIPE_FORMAT_YCBCR,
296 PIPE_TEXTURE_2D,
297 PIPE_TEXTURE_USAGE_SAMPLER, 0) ||
298 screen->is_format_supported(screen, PIPE_FORMAT_YCBCR_REV,
299 PIPE_TEXTURE_2D,
300 PIPE_TEXTURE_USAGE_SAMPLER, 0)) {
301 ctx->Extensions.MESA_ycbcr_texture = GL_TRUE;
302 }
303
304 /* GL_ARB_framebuffer_object */
305 if (ctx->Extensions.EXT_packed_depth_stencil) {
306 /* we support always support GL_EXT_framebuffer_blit */
307 ctx->Extensions.ARB_framebuffer_object = GL_TRUE;
308 }
309 }