1 /**************************************************************************
2 *
3 * Copyright 2007 VMware, Inc.
4 * All Rights Reserved.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
13 *
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
16 * of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
21 * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
25 *
26 **************************************************************************/
27
28 /*
29 * Authors:
30 * Keith Whitwell <keithw@vmware.com>
31 * Brian Paul
32 */
33
34
35 #include "main/context.h"
36 #include "main/macros.h"
37 #include "main/mtypes.h"
38 #include "main/samplerobj.h"
39 #include "main/teximage.h"
40 #include "main/texobj.h"
41 #include "program/prog_instruction.h"
42
43 #include "st_context.h"
44 #include "st_atom.h"
45 #include "st_sampler_view.h"
46 #include "st_texture.h"
47 #include "st_format.h"
48 #include "st_cb_texture.h"
49 #include "pipe/p_context.h"
50 #include "util/format/u_format.h"
51 #include "util/u_inlines.h"
52 #include "cso_cache/cso_context.h"
53
54
55 /**
56 * Get a pipe_sampler_view object from a texture unit.
57 */
58 struct pipe_sampler_view *
st_update_single_texture(struct st_context * st,GLuint texUnit,bool glsl130_or_later,bool ignore_srgb_decode,bool get_reference)59 st_update_single_texture(struct st_context *st,
60 GLuint texUnit, bool glsl130_or_later,
61 bool ignore_srgb_decode, bool get_reference)
62 {
63 struct gl_context *ctx = st->ctx;
64 struct gl_texture_object *texObj;
65
66 texObj = ctx->Texture.Unit[texUnit]._Current;
67 assert(texObj);
68
69 GLenum target = texObj->Target;
70
71 if (unlikely(target == GL_TEXTURE_BUFFER))
72 return st_get_buffer_sampler_view_from_stobj(st, texObj, get_reference);
73
74 if (!st_finalize_texture(ctx, st->pipe, texObj, 0) || !texObj->pt)
75 return NULL; /* out of mem */
76
77 if (target == GL_TEXTURE_EXTERNAL_OES &&
78 texObj->pt->screen->resource_changed)
79 texObj->pt->screen->resource_changed(texObj->pt->screen, texObj->pt);
80
81 return st_get_texture_sampler_view_from_stobj(st, texObj,
82 _mesa_get_samplerobj(ctx, texUnit),
83 glsl130_or_later,
84 ignore_srgb_decode, get_reference);
85 }
86
87
88
89 unsigned
st_get_sampler_views(struct st_context * st,enum pipe_shader_type shader_stage,const struct gl_program * prog,struct pipe_sampler_view ** sampler_views)90 st_get_sampler_views(struct st_context *st,
91 enum pipe_shader_type shader_stage,
92 const struct gl_program *prog,
93 struct pipe_sampler_view **sampler_views)
94 {
95 struct pipe_context *pipe = st->pipe;
96 const GLuint old_max = st->state.num_sampler_views[shader_stage];
97 GLbitfield samplers_used = prog->SamplersUsed;
98 GLbitfield texel_fetch_samplers = prog->info.textures_used_by_txf[0];
99 GLbitfield free_slots = ~prog->SamplersUsed;
100 GLbitfield external_samplers_used = prog->ExternalSamplersUsed;
101 GLuint unit;
102
103 if (samplers_used == 0x0 && old_max == 0)
104 return 0;
105
106 unsigned num_textures = util_last_bit(samplers_used);
107
108 /* prog->sh.data is NULL if it's ARB_fragment_program */
109 bool glsl130 = (prog->sh.data ? prog->sh.data->Version : 0) >= 130;
110
111 /* loop over sampler units (aka tex image units) */
112 for (unit = 0; unit < num_textures; unit++) {
113 unsigned bit = BITFIELD_BIT(unit);
114
115 if (!(samplers_used & bit)) {
116 sampler_views[unit] = NULL;
117 continue;
118 }
119
120 /* The EXT_texture_sRGB_decode extension says:
121 *
122 * "The conversion of sRGB color space components to linear color
123 * space is always performed if the texel lookup function is one
124 * of the texelFetch builtin functions.
125 *
126 * Otherwise, if the texel lookup function is one of the texture
127 * builtin functions or one of the texture gather functions, the
128 * conversion of sRGB color space components to linear color space
129 * is controlled by the TEXTURE_SRGB_DECODE_EXT parameter.
130 *
131 * If the TEXTURE_SRGB_DECODE_EXT parameter is DECODE_EXT, the
132 * conversion of sRGB color space components to linear color space
133 * is performed.
134 *
135 * If the TEXTURE_SRGB_DECODE_EXT parameter is SKIP_DECODE_EXT,
136 * the value is returned without decoding. However, if the texture
137 * is also [statically] accessed with a texelFetch function, then
138 * the result of texture builtin functions and/or texture gather
139 * functions may be returned with decoding or without decoding."
140 *
141 * Note: the "statically" will be added to the language per
142 * https://cvs.khronos.org/bugzilla/show_bug.cgi?id=14934
143 *
144 * So we simply ignore the setting entirely for samplers that are
145 * (statically) accessed with a texelFetch function.
146 */
147 sampler_views[unit] =
148 st_update_single_texture(st, prog->SamplerUnits[unit], glsl130,
149 texel_fetch_samplers & bit, true);
150 }
151
152 /* For any external samplers with multiplaner YUV, stuff the additional
153 * sampler views we need at the end.
154 *
155 * Trying to cache the sampler view in the texObj looks painful, so just
156 * re-create the sampler view for the extra planes each time. Main use
157 * case is video playback (ie. fps games wouldn't be using this) so I
158 * guess no point to try to optimize this feature.
159 */
160 while (unlikely(external_samplers_used)) {
161 GLuint unit = u_bit_scan(&external_samplers_used);
162 GLuint extra = 0;
163 struct gl_texture_object *stObj =
164 st_get_texture_object(st->ctx, prog, unit);
165 struct pipe_sampler_view tmpl;
166
167 if (!stObj)
168 continue;
169
170 /* use original view as template: */
171 tmpl = *sampler_views[unit];
172
173 /* if resource format matches then YUV wasn't lowered */
174 if (st_get_view_format(stObj) == stObj->pt->format)
175 continue;
176
177 switch (st_get_view_format(stObj)) {
178 case PIPE_FORMAT_NV12:
179 if (stObj->pt->format == PIPE_FORMAT_R8_G8B8_420_UNORM)
180 /* no additional views needed */
181 break;
182
183 /* we need one additional R8G8 view: */
184 tmpl.format = PIPE_FORMAT_RG88_UNORM;
185 tmpl.swizzle_g = PIPE_SWIZZLE_Y; /* tmpl from Y plane is R8 */
186 extra = u_bit_scan(&free_slots);
187 sampler_views[extra] =
188 pipe->create_sampler_view(pipe, stObj->pt->next, &tmpl);
189 break;
190 case PIPE_FORMAT_P010:
191 case PIPE_FORMAT_P012:
192 case PIPE_FORMAT_P016:
193 /* we need one additional R16G16 view: */
194 tmpl.format = PIPE_FORMAT_RG1616_UNORM;
195 tmpl.swizzle_g = PIPE_SWIZZLE_Y; /* tmpl from Y plane is R16 */
196 extra = u_bit_scan(&free_slots);
197 sampler_views[extra] =
198 pipe->create_sampler_view(pipe, stObj->pt->next, &tmpl);
199 break;
200 case PIPE_FORMAT_IYUV:
201 /* we need two additional R8 views: */
202 tmpl.format = PIPE_FORMAT_R8_UNORM;
203 extra = u_bit_scan(&free_slots);
204 sampler_views[extra] =
205 pipe->create_sampler_view(pipe, stObj->pt->next, &tmpl);
206 extra = u_bit_scan(&free_slots);
207 sampler_views[extra] =
208 pipe->create_sampler_view(pipe, stObj->pt->next->next, &tmpl);
209 break;
210 case PIPE_FORMAT_YUYV:
211 if (stObj->pt->format == PIPE_FORMAT_R8G8_R8B8_UNORM)
212 /* no additional views needed */
213 break;
214
215 /* we need one additional BGRA8888 view: */
216 tmpl.format = PIPE_FORMAT_BGRA8888_UNORM;
217 tmpl.swizzle_b = PIPE_SWIZZLE_Z;
218 tmpl.swizzle_a = PIPE_SWIZZLE_W;
219 extra = u_bit_scan(&free_slots);
220 sampler_views[extra] =
221 pipe->create_sampler_view(pipe, stObj->pt->next, &tmpl);
222 break;
223 case PIPE_FORMAT_UYVY:
224 if (stObj->pt->format == PIPE_FORMAT_G8R8_B8R8_UNORM)
225 /* no additional views needed */
226 break;
227
228 /* we need one additional RGBA8888 view: */
229 tmpl.format = PIPE_FORMAT_RGBA8888_UNORM;
230 tmpl.swizzle_b = PIPE_SWIZZLE_Z;
231 tmpl.swizzle_a = PIPE_SWIZZLE_W;
232 extra = u_bit_scan(&free_slots);
233 sampler_views[extra] =
234 pipe->create_sampler_view(pipe, stObj->pt->next, &tmpl);
235 break;
236 case PIPE_FORMAT_Y210:
237 case PIPE_FORMAT_Y212:
238 case PIPE_FORMAT_Y216:
239 /* we need one additional R16G16B16A16 view: */
240 tmpl.format = PIPE_FORMAT_R16G16B16A16_UNORM;
241 tmpl.swizzle_b = PIPE_SWIZZLE_Z;
242 tmpl.swizzle_a = PIPE_SWIZZLE_W;
243 extra = u_bit_scan(&free_slots);
244 sampler_views[extra] =
245 pipe->create_sampler_view(pipe, stObj->pt->next, &tmpl);
246 break;
247 default:
248 break;
249 }
250
251 num_textures = MAX2(num_textures, extra + 1);
252 }
253
254 return num_textures;
255 }
256
257 static void
update_textures(struct st_context * st,enum pipe_shader_type shader_stage,const struct gl_program * prog)258 update_textures(struct st_context *st,
259 enum pipe_shader_type shader_stage,
260 const struct gl_program *prog)
261 {
262 struct pipe_sampler_view *sampler_views[PIPE_MAX_SAMPLERS];
263 struct pipe_context *pipe = st->pipe;
264 unsigned num_textures =
265 st_get_sampler_views(st, shader_stage, prog, sampler_views);
266
267 unsigned old_num_textures = st->state.num_sampler_views[shader_stage];
268 unsigned num_unbind = old_num_textures > num_textures ?
269 old_num_textures - num_textures : 0;
270
271 pipe->set_sampler_views(pipe, shader_stage, 0, num_textures, num_unbind,
272 true, sampler_views);
273 st->state.num_sampler_views[shader_stage] = num_textures;
274 }
275
276 void
st_update_vertex_textures(struct st_context * st)277 st_update_vertex_textures(struct st_context *st)
278 {
279 const struct gl_context *ctx = st->ctx;
280
281 if (ctx->Const.Program[MESA_SHADER_VERTEX].MaxTextureImageUnits > 0) {
282 update_textures(st, PIPE_SHADER_VERTEX,
283 ctx->VertexProgram._Current);
284 }
285 }
286
287
288 void
st_update_fragment_textures(struct st_context * st)289 st_update_fragment_textures(struct st_context *st)
290 {
291 const struct gl_context *ctx = st->ctx;
292
293 update_textures(st, PIPE_SHADER_FRAGMENT,
294 ctx->FragmentProgram._Current);
295 }
296
297
298 void
st_update_geometry_textures(struct st_context * st)299 st_update_geometry_textures(struct st_context *st)
300 {
301 const struct gl_context *ctx = st->ctx;
302
303 if (ctx->GeometryProgram._Current) {
304 update_textures(st, PIPE_SHADER_GEOMETRY,
305 ctx->GeometryProgram._Current);
306 }
307 }
308
309
310 void
st_update_tessctrl_textures(struct st_context * st)311 st_update_tessctrl_textures(struct st_context *st)
312 {
313 const struct gl_context *ctx = st->ctx;
314
315 if (ctx->TessCtrlProgram._Current) {
316 update_textures(st, PIPE_SHADER_TESS_CTRL,
317 ctx->TessCtrlProgram._Current);
318 }
319 }
320
321
322 void
st_update_tesseval_textures(struct st_context * st)323 st_update_tesseval_textures(struct st_context *st)
324 {
325 const struct gl_context *ctx = st->ctx;
326
327 if (ctx->TessEvalProgram._Current) {
328 update_textures(st, PIPE_SHADER_TESS_EVAL,
329 ctx->TessEvalProgram._Current);
330 }
331 }
332
333
334 void
st_update_compute_textures(struct st_context * st)335 st_update_compute_textures(struct st_context *st)
336 {
337 const struct gl_context *ctx = st->ctx;
338
339 if (ctx->ComputeProgram._Current) {
340 update_textures(st, PIPE_SHADER_COMPUTE,
341 ctx->ComputeProgram._Current);
342 }
343 }
344