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comparison: gfx/skia/trunk/src/gpu/gl/GrGpuGL_program.cpp

gfx/skia/trunk/src/gpu/gl/GrGpuGL_program.cpp

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1 /*
2 * Copyright 2011 Google Inc.
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
7
8 #include "GrGpuGL.h"
9
10 #include "GrEffect.h"
11 #include "GrGLEffect.h"
12 #include "SkRTConf.h"
13 #include "SkTSearch.h"
14
15 #ifdef PROGRAM_CACHE_STATS
16 SK_CONF_DECLARE(bool, c_DisplayCache, "gpu.displayCache", false,
17 "Display program cache usage.");
18 #endif
19
20 typedef GrGLUniformManager::UniformHandle UniformHandle;
21
22 struct GrGpuGL::ProgramCache::Entry {
23 SK_DECLARE_INST_COUNT_ROOT(Entry);
24 Entry() : fProgram(NULL), fLRUStamp(0) {}
25
26 SkAutoTUnref<GrGLProgram> fProgram;
27 unsigned int fLRUStamp;
28 };
29
30 struct GrGpuGL::ProgramCache::ProgDescLess {
31 bool operator() (const GrGLProgramDesc& desc, const Entry* entry) {
32 SkASSERT(NULL != entry->fProgram.get());
33 return GrGLProgramDesc::Less(desc, entry->fProgram->getDesc());
34 }
35
36 bool operator() (const Entry* entry, const GrGLProgramDesc& desc) {
37 SkASSERT(NULL != entry->fProgram.get());
38 return GrGLProgramDesc::Less(entry->fProgram->getDesc(), desc);
39 }
40 };
41
42 GrGpuGL::ProgramCache::ProgramCache(GrGpuGL* gpu)
43 : fCount(0)
44 , fCurrLRUStamp(0)
45 , fGpu(gpu)
46 #ifdef PROGRAM_CACHE_STATS
47 , fTotalRequests(0)
48 , fCacheMisses(0)
49 , fHashMisses(0)
50 #endif
51 {
52 for (int i = 0; i < 1 << kHashBits; ++i) {
53 fHashTable[i] = NULL;
54 }
55 }
56
57 GrGpuGL::ProgramCache::~ProgramCache() {
58 for (int i = 0; i < fCount; ++i){
59 SkDELETE(fEntries[i]);
60 }
61 // dump stats
62 #ifdef PROGRAM_CACHE_STATS
63 if (c_DisplayCache) {
64 SkDebugf("--- Program Cache ---\n");
65 SkDebugf("Total requests: %d\n", fTotalRequests);
66 SkDebugf("Cache misses: %d\n", fCacheMisses);
67 SkDebugf("Cache miss %%: %f\n", (fTotalRequests > 0) ?
68 100.f * fCacheMisses / fTotalRequests :
69 0.f);
70 int cacheHits = fTotalRequests - fCacheMisses;
71 SkDebugf("Hash miss %%: %f\n", (cacheHits > 0) ? 100.f * fHashMisses / cacheHits : 0.f);
72 SkDebugf("---------------------\n");
73 }
74 #endif
75 }
76
77 void GrGpuGL::ProgramCache::abandon() {
78 for (int i = 0; i < fCount; ++i) {
79 SkASSERT(NULL != fEntries[i]->fProgram.get());
80 fEntries[i]->fProgram->abandon();
81 fEntries[i]->fProgram.reset(NULL);
82 }
83 fCount = 0;
84 }
85
86 int GrGpuGL::ProgramCache::search(const GrGLProgramDesc& desc) const {
87 ProgDescLess less;
88 return SkTSearch(fEntries, fCount, desc, sizeof(Entry*), less);
89 }
90
91 GrGLProgram* GrGpuGL::ProgramCache::getProgram(const GrGLProgramDesc& desc,
92 const GrEffectStage* colorStages[],
93 const GrEffectStage* coverageStages[]) {
94 #ifdef PROGRAM_CACHE_STATS
95 ++fTotalRequests;
96 #endif
97
98 Entry* entry = NULL;
99
100 uint32_t hashIdx = desc.getChecksum();
101 hashIdx ^= hashIdx >> 16;
102 if (kHashBits <= 8) {
103 hashIdx ^= hashIdx >> 8;
104 }
105 hashIdx &=((1 << kHashBits) - 1);
106 Entry* hashedEntry = fHashTable[hashIdx];
107 if (NULL != hashedEntry && hashedEntry->fProgram->getDesc() == desc) {
108 SkASSERT(NULL != hashedEntry->fProgram);
109 entry = hashedEntry;
110 }
111
112 int entryIdx;
113 if (NULL == entry) {
114 entryIdx = this->search(desc);
115 if (entryIdx >= 0) {
116 entry = fEntries[entryIdx];
117 #ifdef PROGRAM_CACHE_STATS
118 ++fHashMisses;
119 #endif
120 }
121 }
122
123 if (NULL == entry) {
124 // We have a cache miss
125 #ifdef PROGRAM_CACHE_STATS
126 ++fCacheMisses;
127 #endif
128 GrGLProgram* program = GrGLProgram::Create(fGpu, desc, colorStages, coverageStages);
129 if (NULL == program) {
130 return NULL;
131 }
132 int purgeIdx = 0;
133 if (fCount < kMaxEntries) {
134 entry = SkNEW(Entry);
135 purgeIdx = fCount++;
136 fEntries[purgeIdx] = entry;
137 } else {
138 SkASSERT(fCount == kMaxEntries);
139 purgeIdx = 0;
140 for (int i = 1; i < kMaxEntries; ++i) {
141 if (fEntries[i]->fLRUStamp < fEntries[purgeIdx]->fLRUStamp) {
142 purgeIdx = i;
143 }
144 }
145 entry = fEntries[purgeIdx];
146 int purgedHashIdx = entry->fProgram->getDesc().getChecksum() & ((1 << kHashBits) - 1);
147 if (fHashTable[purgedHashIdx] == entry) {
148 fHashTable[purgedHashIdx] = NULL;
149 }
150 }
151 SkASSERT(fEntries[purgeIdx] == entry);
152 entry->fProgram.reset(program);
153 // We need to shift fEntries around so that the entry currently at purgeIdx is placed
154 // just before the entry at ~entryIdx (in order to keep fEntries sorted by descriptor).
155 entryIdx = ~entryIdx;
156 if (entryIdx < purgeIdx) {
157 // Let E and P be the entries at index entryIdx and purgeIdx, respectively.
158 // If the entries array looks like this:
159 // aaaaEbbbbbPccccc
160 // we rearrange it to look like this:
161 // aaaaPEbbbbbccccc
162 size_t copySize = (purgeIdx - entryIdx) * sizeof(Entry*);
163 memmove(fEntries + entryIdx + 1, fEntries + entryIdx, copySize);
164 fEntries[entryIdx] = entry;
165 } else if (purgeIdx < entryIdx) {
166 // If the entries array looks like this:
167 // aaaaPbbbbbEccccc
168 // we rearrange it to look like this:
169 // aaaabbbbbPEccccc
170 size_t copySize = (entryIdx - purgeIdx - 1) * sizeof(Entry*);
171 memmove(fEntries + purgeIdx, fEntries + purgeIdx + 1, copySize);
172 fEntries[entryIdx - 1] = entry;
173 }
174 #ifdef SK_DEBUG
175 SkASSERT(NULL != fEntries[0]->fProgram.get());
176 for (int i = 0; i < fCount - 1; ++i) {
177 SkASSERT(NULL != fEntries[i + 1]->fProgram.get());
178 const GrGLProgramDesc& a = fEntries[i]->fProgram->getDesc();
179 const GrGLProgramDesc& b = fEntries[i + 1]->fProgram->getDesc();
180 SkASSERT(GrGLProgramDesc::Less(a, b));
181 SkASSERT(!GrGLProgramDesc::Less(b, a));
182 }
183 #endif
184 }
185
186 fHashTable[hashIdx] = entry;
187 entry->fLRUStamp = fCurrLRUStamp;
188
189 if (SK_MaxU32 == fCurrLRUStamp) {
190 // wrap around! just trash our LRU, one time hit.
191 for (int i = 0; i < fCount; ++i) {
192 fEntries[i]->fLRUStamp = 0;
193 }
194 }
195 ++fCurrLRUStamp;
196 return entry->fProgram;
197 }
198
199 ////////////////////////////////////////////////////////////////////////////////
200
201 void GrGpuGL::abandonResources(){
202 INHERITED::abandonResources();
203 fProgramCache->abandon();
204 fHWProgramID = 0;
205 }
206
207 ////////////////////////////////////////////////////////////////////////////////
208
209 #define GL_CALL(X) GR_GL_CALL(this->glInterface(), X)
210
211 bool GrGpuGL::flushGraphicsState(DrawType type, const GrDeviceCoordTexture* dstCopy) {
212 const GrDrawState& drawState = this->getDrawState();
213
214 // GrGpu::setupClipAndFlushState should have already checked this and bailed if not true.
215 SkASSERT(NULL != drawState.getRenderTarget());
216
217 if (kStencilPath_DrawType == type) {
218 const GrRenderTarget* rt = this->getDrawState().getRenderTarget();
219 SkISize size;
220 size.set(rt->width(), rt->height());
221 this->setProjectionMatrix(drawState.getViewMatrix(), size, rt->origin());
222 } else {
223 this->flushMiscFixedFunctionState();
224
225 GrBlendCoeff srcCoeff;
226 GrBlendCoeff dstCoeff;
227 GrDrawState::BlendOptFlags blendOpts = drawState.getBlendOpts(false, &srcCoeff, &dstCoeff);
228 if (GrDrawState::kSkipDraw_BlendOptFlag & blendOpts) {
229 return false;
230 }
231
232 SkSTArray<8, const GrEffectStage*, true> colorStages;
233 SkSTArray<8, const GrEffectStage*, true> coverageStages;
234 GrGLProgramDesc desc;
235 GrGLProgramDesc::Build(this->getDrawState(),
236 kDrawPoints_DrawType == type,
237 blendOpts,
238 srcCoeff,
239 dstCoeff,
240 this,
241 dstCopy,
242 &colorStages,
243 &coverageStages,
244 &desc);
245
246 fCurrentProgram.reset(fProgramCache->getProgram(desc,
247 colorStages.begin(),
248 coverageStages.begin()));
249 if (NULL == fCurrentProgram.get()) {
250 SkDEBUGFAIL("Failed to create program!");
251 return false;
252 }
253
254 SkASSERT(kDrawPath_DrawType != type || !fCurrentProgram->hasVertexShader());
255
256 fCurrentProgram.get()->ref();
257
258 GrGLuint programID = fCurrentProgram->programID();
259 if (fHWProgramID != programID) {
260 GL_CALL(UseProgram(programID));
261 fHWProgramID = programID;
262 }
263
264 fCurrentProgram->overrideBlend(&srcCoeff, &dstCoeff);
265 this->flushBlend(kDrawLines_DrawType == type, srcCoeff, dstCoeff);
266
267 fCurrentProgram->setData(blendOpts,
268 colorStages.begin(),
269 coverageStages.begin(),
270 dstCopy,
271 &fSharedGLProgramState);
272 }
273 this->flushStencil(type);
274 this->flushScissor();
275 this->flushAAState(type);
276
277 SkIRect* devRect = NULL;
278 SkIRect devClipBounds;
279 if (drawState.isClipState()) {
280 this->getClip()->getConservativeBounds(drawState.getRenderTarget(), &devClipBounds);
281 devRect = &devClipBounds;
282 }
283 // This must come after textures are flushed because a texture may need
284 // to be msaa-resolved (which will modify bound FBO state).
285 this->flushRenderTarget(devRect);
286
287 return true;
288 }
289
290 void GrGpuGL::setupGeometry(const DrawInfo& info, size_t* indexOffsetInBytes) {
291
292 GrGLsizei stride = static_cast<GrGLsizei>(this->getDrawState().getVertexSize());
293
294 size_t vertexOffsetInBytes = stride * info.startVertex();
295
296 const GeometryPoolState& geoPoolState = this->getGeomPoolState();
297
298 GrGLVertexBuffer* vbuf;
299 switch (this->getGeomSrc().fVertexSrc) {
300 case kBuffer_GeometrySrcType:
301 vbuf = (GrGLVertexBuffer*) this->getGeomSrc().fVertexBuffer;
302 break;
303 case kArray_GeometrySrcType:
304 case kReserved_GeometrySrcType:
305 this->finalizeReservedVertices();
306 vertexOffsetInBytes += geoPoolState.fPoolStartVertex * this->getGeomSrc().fVertexSize;
307 vbuf = (GrGLVertexBuffer*) geoPoolState.fPoolVertexBuffer;
308 break;
309 default:
310 vbuf = NULL; // suppress warning
311 GrCrash("Unknown geometry src type!");
312 }
313
314 SkASSERT(NULL != vbuf);
315 SkASSERT(!vbuf->isLocked());
316 vertexOffsetInBytes += vbuf->baseOffset();
317
318 GrGLIndexBuffer* ibuf = NULL;
319 if (info.isIndexed()) {
320 SkASSERT(NULL != indexOffsetInBytes);
321
322 switch (this->getGeomSrc().fIndexSrc) {
323 case kBuffer_GeometrySrcType:
324 *indexOffsetInBytes = 0;
325 ibuf = (GrGLIndexBuffer*)this->getGeomSrc().fIndexBuffer;
326 break;
327 case kArray_GeometrySrcType:
328 case kReserved_GeometrySrcType:
329 this->finalizeReservedIndices();
330 *indexOffsetInBytes = geoPoolState.fPoolStartIndex * sizeof(GrGLushort);
331 ibuf = (GrGLIndexBuffer*) geoPoolState.fPoolIndexBuffer;
332 break;
333 default:
334 ibuf = NULL; // suppress warning
335 GrCrash("Unknown geometry src type!");
336 }
337
338 SkASSERT(NULL != ibuf);
339 SkASSERT(!ibuf->isLocked());
340 *indexOffsetInBytes += ibuf->baseOffset();
341 }
342 GrGLAttribArrayState* attribState =
343 fHWGeometryState.bindArrayAndBuffersToDraw(this, vbuf, ibuf);
344
345 if (!fCurrentProgram->hasVertexShader()) {
346 int posIdx = this->getDrawState().positionAttributeIndex();
347 const GrVertexAttrib* vertexAttrib = this->getDrawState().getVertexAttribs() + posIdx;
348 GrVertexAttribType attribType = vertexAttrib->fType;
349 SkASSERT(!GrGLAttribTypeToLayout(attribType).fNormalized);
350 SkASSERT(GrGLAttribTypeToLayout(attribType).fCount == 2);
351
352 // Attrib at location 0 is defined to be bound to vertex in fixed-function pipe. Asserts
353 // above should make sure position attribute goes to location 0 when below code is executed.
354
355 attribState->set(this,
356 0,
357 vbuf,
358 GrGLAttribTypeToLayout(attribType).fCount,
359 GrGLAttribTypeToLayout(attribType).fType,
360 GrGLAttribTypeToLayout(attribType).fNormalized,
361 stride,
362 reinterpret_cast<GrGLvoid*>(
363 vertexOffsetInBytes + vertexAttrib->fOffset));
364 attribState->disableUnusedArrays(this, 1);
365 } else {
366 int vertexAttribCount = this->getDrawState().getVertexAttribCount();
367 uint32_t usedAttribArraysMask = 0;
368 const GrVertexAttrib* vertexAttrib = this->getDrawState().getVertexAttribs();
369
370 for (int vertexAttribIndex = 0; vertexAttribIndex < vertexAttribCount;
371 ++vertexAttribIndex, ++vertexAttrib) {
372
373 usedAttribArraysMask |= (1 << vertexAttribIndex);
374 GrVertexAttribType attribType = vertexAttrib->fType;
375 attribState->set(this,
376 vertexAttribIndex,
377 vbuf,
378 GrGLAttribTypeToLayout(attribType).fCount,
379 GrGLAttribTypeToLayout(attribType).fType,
380 GrGLAttribTypeToLayout(attribType).fNormalized,
381 stride,
382 reinterpret_cast<GrGLvoid*>(
383 vertexOffsetInBytes + vertexAttrib->fOffset));
384 }
385 attribState->disableUnusedArrays(this, usedAttribArraysMask);
386 }
387 }

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