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Side by Side Diff: src/gpu/GrAARectRenderer.cpp

Issue 845103005: GrBatchPrototype (Closed) Base URL: https://skia.googlesource.com/skia.git@lc2
Patch Set: cleanup Created 5 years, 10 months ago
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1 /* 1 /*
2 * Copyright 2012 Google Inc. 2 * Copyright 2012 Google Inc.
3 * 3 *
4 * Use of this source code is governed by a BSD-style license that can be 4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file. 5 * found in the LICENSE file.
6 */ 6 */
7 7
8 #include "GrAARectRenderer.h" 8 #include "GrAARectRenderer.h"
9 #include "GrBatch.h"
10 #include "GrBatchBuffer.h"
11 #include "GrBufferAllocPool.h"
9 #include "GrDefaultGeoProcFactory.h" 12 #include "GrDefaultGeoProcFactory.h"
10 #include "GrGeometryProcessor.h" 13 #include "GrGeometryProcessor.h"
11 #include "GrGpu.h" 14 #include "GrGpu.h"
12 #include "GrInvariantOutput.h" 15 #include "GrInvariantOutput.h"
13 #include "SkColorPriv.h" 16 #include "SkColorPriv.h"
14 #include "gl/GrGLProcessor.h" 17 #include "gl/GrGLProcessor.h"
15 #include "gl/GrGLGeometryProcessor.h" 18 #include "gl/GrGLGeometryProcessor.h"
16 #include "gl/builders/GrGLProgramBuilder.h" 19 #include "gl/builders/GrGLProgramBuilder.h"
17 20
18 /////////////////////////////////////////////////////////////////////////////// 21 ///////////////////////////////////////////////////////////////////////////////
19 22
20 namespace {
21 // Should the coverage be multiplied into the color attrib or use a separate att rib.
22 enum CoverageAttribType {
23 kUseColor_CoverageAttribType,
24 kUseCoverage_CoverageAttribType,
25 };
26 }
27
28 static const GrGeometryProcessor* create_rect_gp(const GrPipelineBuilder& pipeli neBuilder,
29 GrColor color,
30 CoverageAttribType* type,
31 const SkMatrix& localMatrix) {
32 uint32_t flags = GrDefaultGeoProcFactory::kColor_GPType;
33 const GrGeometryProcessor* gp;
34 if (pipelineBuilder.canTweakAlphaForCoverage()) {
35 gp = GrDefaultGeoProcFactory::Create(flags, color, SkMatrix::I(), localM atrix);
36 SkASSERT(gp->getVertexStride() == sizeof(GrDefaultGeoProcFactory::Positi onColorAttr));
37 *type = kUseColor_CoverageAttribType;
38 } else {
39 flags |= GrDefaultGeoProcFactory::kCoverage_GPType;
40 gp = GrDefaultGeoProcFactory::Create(flags, color, SkMatrix::I(), localM atrix,
41 GrColorIsOpaque(color));
42 SkASSERT(gp->getVertexStride()==sizeof(GrDefaultGeoProcFactory::Position ColorCoverageAttr));
43 *type = kUseCoverage_CoverageAttribType;
44 }
45 return gp;
46 }
47
48 static void set_inset_fan(SkPoint* pts, size_t stride, 23 static void set_inset_fan(SkPoint* pts, size_t stride,
49 const SkRect& r, SkScalar dx, SkScalar dy) { 24 const SkRect& r, SkScalar dx, SkScalar dy) {
50 pts->setRectFan(r.fLeft + dx, r.fTop + dy, 25 pts->setRectFan(r.fLeft + dx, r.fTop + dy,
51 r.fRight - dx, r.fBottom - dy, stride); 26 r.fRight - dx, r.fBottom - dy, stride);
52 } 27 }
53 28
54 void GrAARectRenderer::reset() {
55 SkSafeSetNull(fAAFillRectIndexBuffer);
56 SkSafeSetNull(fAAMiterStrokeRectIndexBuffer);
57 SkSafeSetNull(fAABevelStrokeRectIndexBuffer);
58 }
59
60 static const uint16_t gFillAARectIdx[] = { 29 static const uint16_t gFillAARectIdx[] = {
61 0, 1, 5, 5, 4, 0, 30 0, 1, 5, 5, 4, 0,
62 1, 2, 6, 6, 5, 1, 31 1, 2, 6, 6, 5, 1,
63 2, 3, 7, 7, 6, 2, 32 2, 3, 7, 7, 6, 2,
64 3, 0, 4, 4, 7, 3, 33 3, 0, 4, 4, 7, 3,
65 4, 5, 6, 6, 7, 4, 34 4, 5, 6, 6, 7, 4,
66 }; 35 };
67 36
68 static const int kIndicesPerAAFillRect = SK_ARRAY_COUNT(gFillAARectIdx); 37 static const int kIndicesPerAAFillRect = SK_ARRAY_COUNT(gFillAARectIdx);
69 static const int kVertsPerAAFillRect = 8; 38 static const int kVertsPerAAFillRect = 8;
70 static const int kNumAAFillRectsInIndexBuffer = 256; 39 static const int kNumAAFillRectsInIndexBuffer = 256;
71 40
41 static const GrGeometryProcessor* create_fill_rect_gp(bool tweakAlphaForCoverage ,
42 const SkMatrix& localMatri x) {
43 uint32_t flags = GrDefaultGeoProcFactory::kColor_GPType;
44 const GrGeometryProcessor* gp;
45 if (tweakAlphaForCoverage) {
46 gp = GrDefaultGeoProcFactory::Create(flags, GrColor_WHITE, SkMatrix::I() , localMatrix,
47 false, 0xff);
48 } else {
49 flags |= GrDefaultGeoProcFactory::kCoverage_GPType;
50 gp = GrDefaultGeoProcFactory::Create(flags, GrColor_WHITE, SkMatrix::I() , localMatrix,
51 false, 0xff);
52 }
53 return gp;
54 }
55
56 class AAFillRectBatch : public GrBatch {
57 public:
58 struct Geometry {
59 GrColor fColor;
60 SkMatrix fViewMatrix;
61 SkRect fRect;
62 SkRect fDevRect;
63 };
64
65 static GrBatch* Create(const Geometry& geometry, const GrIndexBuffer* indexB uffer) {
66 return SkNEW_ARGS(AAFillRectBatch, (geometry, indexBuffer));
67 }
68
69 const char* name() const SK_OVERRIDE { return "AAFillRectBatch"; }
70
71 void getInvariantOutputColor(GrInitInvariantOutput* out,
72 const GrBatchOpt& batchOpt) const SK_OVERRIDE {
73 // When this is called on a batch, there is only one geometry bundle
74 if (!batchOpt.fCanTweakAlphaForCoverage && GrColorIsOpaque(fGeoData[0].f Color)) {
75 out->setUnknownOpaqueFourComponents();
76 } else {
77 out->setUnknownFourComponents();
78 }
79 }
80
81 void getInvariantOutputCoverage(GrInitInvariantOutput* out,
82 const GrBatchOpt& batchOpt) const SK_OVERRID E {
83 if (batchOpt.fCanTweakAlphaForCoverage) {
84 // uniform coverage
85 out->setKnownSingleComponent(0xff);
86 } else {
87 out->setUnknownSingleComponent();
88 }
89 }
90
91 void initBatchOpt(const GrBatchOpt& batchOpt) {
92 fBatchOpt = batchOpt;
93 }
94
95 void initBatchTracker(const GrPipelineInfo& init) SK_OVERRIDE {
96 // Handle any color overrides
97 if (init.fColorIgnored) {
98 fGeoData[0].fColor = GrColor_ILLEGAL;
99 } else if (GrColor_ILLEGAL != init.fOverrideColor) {
100 fGeoData[0].fColor = init.fOverrideColor;
101 }
102
103 // setup batch properties
104 fBatch.fColorIgnored = init.fColorIgnored;
105 fBatch.fColor = fGeoData[0].fColor;
106 fBatch.fUsesLocalCoords = init.fUsesLocalCoords;
107 fBatch.fCoverageIgnored = init.fCoverageIgnored;
108 }
109
110 void generateGeometry(GrBatchTarget* batchTarget, const GrPipeline* pipeline ) SK_OVERRIDE {
111 bool canTweakAlphaForCoverage = this->canTweakAlphaForCoverage();
112
113 SkMatrix localMatrix;
114 if (!this->viewMatrix().invert(&localMatrix)) {
115 SkDebugf("Cannot invert\n");
116 return;
117 }
118
119 const GrGeometryProcessor* gp = create_fill_rect_gp(canTweakAlphaForCove rage,
120 localMatrix);
121
122 batchTarget->initDraw(gp, pipeline);
123 gp->unref();
124
125 // TODO this is hacky, but the only way we have to initialize the GP is to use the
126 // GrPipelineInfo struct so we can generate the correct shader. Once we have GrBatch
127 // everywhere we can remove this nastiness
128 GrPipelineInfo init;
129 init.fColorIgnored = fBatch.fColorIgnored;
130 init.fOverrideColor = GrColor_ILLEGAL;
131 init.fCoverageIgnored = fBatch.fCoverageIgnored;
132 init.fUsesLocalCoords = this->usesLocalCoords();
133 gp->initBatchTracker(batchTarget->currentBatchTracker(), init);
134
135 size_t vertexStride = gp->getVertexStride();
136
137 SkASSERT(canTweakAlphaForCoverage ?
138 vertexStride == sizeof(GrDefaultGeoProcFactory::PositionColorAt tr) :
139 vertexStride == sizeof(GrDefaultGeoProcFactory::PositionColorCo verageAttr));
140
141 int instanceCount = fGeoData.count();
142 int vertexCount = kVertsPerAAFillRect * instanceCount;
143
144 const GrVertexBuffer* vertexBuffer;
145 int firstVertex;
146
147 void *vertices = batchTarget->vertexPool()->makeSpace(vertexStride,
148 vertexCount,
149 &vertexBuffer,
150 &firstVertex);
151
152 for (int i = 0; i < instanceCount; i++) {
153 const Geometry& args = fGeoData[i];
154 this->generateAAFillRectGeometry(vertices,
155 i * kVertsPerAAFillRect * vertexStride,
156 vertexStride,
157 args.fColor,
158 args.fViewMatrix,
159 args.fRect,
160 args.fDevRect,
161 canTweakAlphaForCoverage);
162 }
163
164 GrDrawTarget::DrawInfo drawInfo;
165 drawInfo.setPrimitiveType(kTriangles_GrPrimitiveType);
166 drawInfo.setStartVertex(0);
167 drawInfo.setStartIndex(0);
168 drawInfo.setVerticesPerInstance(kVertsPerAAFillRect);
169 drawInfo.setIndicesPerInstance(kIndicesPerAAFillRect);
170 drawInfo.adjustStartVertex(firstVertex);
171 drawInfo.setVertexBuffer(vertexBuffer);
172 drawInfo.setIndexBuffer(fIndexBuffer);
173
174 int maxInstancesPerDraw = kNumAAFillRectsInIndexBuffer;
175
176 while (instanceCount) {
177 drawInfo.setInstanceCount(SkTMin(instanceCount, maxInstancesPerDraw) );
178 drawInfo.setVertexCount(drawInfo.instanceCount() * drawInfo.vertices PerInstance());
179 drawInfo.setIndexCount(drawInfo.instanceCount() * drawInfo.indicesPe rInstance());
180
181 batchTarget->draw(drawInfo);
182
183 drawInfo.setStartVertex(drawInfo.startVertex() + drawInfo.vertexCoun t());
184 instanceCount -= drawInfo.instanceCount();
185 }
186 }
187
188 SkSTArray<1, Geometry, true>* geoData() { return &fGeoData; }
189
190 private:
191 AAFillRectBatch(const Geometry& geometry, const GrIndexBuffer* indexBuffer)
192 : fIndexBuffer(indexBuffer) {
193 this->initClassID<AAFillRectBatch>();
194 fGeoData.push_back(geometry);
195 }
196
197 GrColor color() const { return fBatch.fColor; }
198 bool usesLocalCoords() const { return fBatch.fUsesLocalCoords; }
199 bool canTweakAlphaForCoverage() const { return fBatchOpt.fCanTweakAlphaForCo verage; }
200 bool colorIgnored() const { return fBatch.fColorIgnored; }
201 const SkMatrix& viewMatrix() const { return fGeoData[0].fViewMatrix; }
202
203 bool onCombineIfPossible(GrBatch* t) SK_OVERRIDE {
204 AAFillRectBatch* that = t->cast<AAFillRectBatch>();
205 if (this->canTweakAlphaForCoverage() != that->canTweakAlphaForCoverage() ) {
206 return false;
207 }
208
209 if (this->colorIgnored() != that->colorIgnored()) {
210 return false;
211 }
212
213 if (this->usesLocalCoords() != that->usesLocalCoords()) {
214 return false;
215 }
216
217 // We apply the viewmatrix to the rect points on the cpu. However, if t he pipeline uses
218 // local coords then we won't be able to batch. We could actually uploa d the viewmatrix
219 // using vertex attributes in these cases, but haven't investigated that
220 if (this->usesLocalCoords() && !this->viewMatrix().cheapEqualTo(that->vi ewMatrix())) {
221 return false;
222 }
223
224 if (this->color() != that->color()) {
225 fBatch.fColor = GrColor_ILLEGAL;
226 }
227 fGeoData.push_back_n(that->geoData()->count(), that->geoData()->begin()) ;
228 return true;
229 }
230
231 void generateAAFillRectGeometry(void* vertices,
232 uint32_t offset,
233 uint32_t vertexStride,
234 GrColor color,
235 const SkMatrix& viewMatrix,
236 const SkRect& rect,
237 const SkRect& devRect,
238 bool tweakAlphaForCoverage) const {
239 intptr_t verts = reinterpret_cast<intptr_t>(vertices) + offset;
240
241 SkPoint* fan0Pos = reinterpret_cast<SkPoint*>(verts);
242 SkPoint* fan1Pos = reinterpret_cast<SkPoint*>(verts + 4 * vertexStride);
243
244 SkScalar inset = SkMinScalar(devRect.width(), SK_Scalar1);
245 inset = SK_ScalarHalf * SkMinScalar(inset, devRect.height());
246
247 if (viewMatrix.rectStaysRect()) {
248 set_inset_fan(fan0Pos, vertexStride, devRect, -SK_ScalarHalf, -SK_Sc alarHalf);
249 set_inset_fan(fan1Pos, vertexStride, devRect, inset, inset);
250 } else {
251 // compute transformed (1, 0) and (0, 1) vectors
252 SkVector vec[2] = {
253 { viewMatrix[SkMatrix::kMScaleX], viewMatrix[SkMatrix::kMSkewY] },
254 { viewMatrix[SkMatrix::kMSkewX], viewMatrix[SkMatrix::kMScaleY] }
255 };
256
257 vec[0].normalize();
258 vec[0].scale(SK_ScalarHalf);
259 vec[1].normalize();
260 vec[1].scale(SK_ScalarHalf);
261
262 // create the rotated rect
263 fan0Pos->setRectFan(rect.fLeft, rect.fTop,
264 rect.fRight, rect.fBottom, vertexStride);
265 viewMatrix.mapPointsWithStride(fan0Pos, vertexStride, 4);
266
267 // Now create the inset points and then outset the original
268 // rotated points
269
270 // TL
271 *((SkPoint*)((intptr_t)fan1Pos + 0 * vertexStride)) =
272 *((SkPoint*)((intptr_t)fan0Pos + 0 * vertexStride)) + vec[0] + v ec[1];
273 *((SkPoint*)((intptr_t)fan0Pos + 0 * vertexStride)) -= vec[0] + vec[ 1];
274 // BL
275 *((SkPoint*)((intptr_t)fan1Pos + 1 * vertexStride)) =
276 *((SkPoint*)((intptr_t)fan0Pos + 1 * vertexStride)) + vec[0] - v ec[1];
277 *((SkPoint*)((intptr_t)fan0Pos + 1 * vertexStride)) -= vec[0] - vec[ 1];
278 // BR
279 *((SkPoint*)((intptr_t)fan1Pos + 2 * vertexStride)) =
280 *((SkPoint*)((intptr_t)fan0Pos + 2 * vertexStride)) - vec[0] - v ec[1];
281 *((SkPoint*)((intptr_t)fan0Pos + 2 * vertexStride)) += vec[0] + vec[ 1];
282 // TR
283 *((SkPoint*)((intptr_t)fan1Pos + 3 * vertexStride)) =
284 *((SkPoint*)((intptr_t)fan0Pos + 3 * vertexStride)) - vec[0] + v ec[1];
285 *((SkPoint*)((intptr_t)fan0Pos + 3 * vertexStride)) += vec[0] - vec[ 1];
286 }
287
288 // Make verts point to vertex color and then set all the color and cover age vertex attrs
289 // values.
290 verts += sizeof(SkPoint);
291 for (int i = 0; i < 4; ++i) {
292 if (tweakAlphaForCoverage) {
293 *reinterpret_cast<GrColor*>(verts + i * vertexStride) = 0;
294 } else {
295 *reinterpret_cast<GrColor*>(verts + i * vertexStride) = color;
296 *reinterpret_cast<float*>(verts + i * vertexStride + sizeof(GrCo lor)) = 0;
297 }
298 }
299
300 int scale;
301 if (inset < SK_ScalarHalf) {
302 scale = SkScalarFloorToInt(512.0f * inset / (inset + SK_ScalarHalf)) ;
303 SkASSERT(scale >= 0 && scale <= 255);
304 } else {
305 scale = 0xff;
306 }
307
308 verts += 4 * vertexStride;
309
310 float innerCoverage = GrNormalizeByteToFloat(scale);
311 GrColor scaledColor = (0xff == scale) ? color : SkAlphaMulQ(color, scale );
312
313 for (int i = 0; i < 4; ++i) {
314 if (tweakAlphaForCoverage) {
315 *reinterpret_cast<GrColor*>(verts + i * vertexStride) = scaledCo lor;
316 } else {
317 *reinterpret_cast<GrColor*>(verts + i * vertexStride) = color;
318 *reinterpret_cast<float*>(verts + i * vertexStride +
319 sizeof(GrColor)) = innerCoverage;
320 }
321 }
322 }
323
324 struct BatchTracker {
325 GrColor fColor;
326 bool fUsesLocalCoords;
327 bool fColorIgnored;
328 bool fCoverageIgnored;
329 };
330
331 GrBatchOpt fBatchOpt;
332 BatchTracker fBatch;
333 const GrIndexBuffer* fIndexBuffer;
334 SkSTArray<1, Geometry, true> fGeoData;
335 };
336
337 namespace {
338 // Should the coverage be multiplied into the color attrib or use a separate att rib.
339 enum CoverageAttribType {
340 kUseColor_CoverageAttribType,
341 kUseCoverage_CoverageAttribType,
342 };
343 }
344
345 void GrAARectRenderer::reset() {
346 SkSafeSetNull(fAAFillRectIndexBuffer);
347 SkSafeSetNull(fAAMiterStrokeRectIndexBuffer);
348 SkSafeSetNull(fAABevelStrokeRectIndexBuffer);
349 }
350
72 static const uint16_t gMiterStrokeAARectIdx[] = { 351 static const uint16_t gMiterStrokeAARectIdx[] = {
73 0 + 0, 1 + 0, 5 + 0, 5 + 0, 4 + 0, 0 + 0, 352 0 + 0, 1 + 0, 5 + 0, 5 + 0, 4 + 0, 0 + 0,
74 1 + 0, 2 + 0, 6 + 0, 6 + 0, 5 + 0, 1 + 0, 353 1 + 0, 2 + 0, 6 + 0, 6 + 0, 5 + 0, 1 + 0,
75 2 + 0, 3 + 0, 7 + 0, 7 + 0, 6 + 0, 2 + 0, 354 2 + 0, 3 + 0, 7 + 0, 7 + 0, 6 + 0, 2 + 0,
76 3 + 0, 0 + 0, 4 + 0, 4 + 0, 7 + 0, 3 + 0, 355 3 + 0, 0 + 0, 4 + 0, 4 + 0, 7 + 0, 3 + 0,
77 356
78 0 + 4, 1 + 4, 5 + 4, 5 + 4, 4 + 4, 0 + 4, 357 0 + 4, 1 + 4, 5 + 4, 5 + 4, 4 + 4, 0 + 4,
79 1 + 4, 2 + 4, 6 + 4, 6 + 4, 5 + 4, 1 + 4, 358 1 + 4, 2 + 4, 6 + 4, 6 + 4, 5 + 4, 1 + 4,
80 2 + 4, 3 + 4, 7 + 4, 7 + 4, 6 + 4, 2 + 4, 359 2 + 4, 3 + 4, 7 + 4, 7 + 4, 6 + 4, 2 + 4,
81 3 + 4, 0 + 4, 4 + 4, 4 + 4, 7 + 4, 3 + 4, 360 3 + 4, 0 + 4, 4 + 4, 4 + 4, 7 + 4, 3 + 4,
(...skipping 95 matching lines...) Expand 10 before | Expand all | Expand 10 after
177 return fAABevelStrokeRectIndexBuffer; 456 return fAABevelStrokeRectIndexBuffer;
178 } 457 }
179 } 458 }
180 459
181 void GrAARectRenderer::geometryFillAARect(GrDrawTarget* target, 460 void GrAARectRenderer::geometryFillAARect(GrDrawTarget* target,
182 GrPipelineBuilder* pipelineBuilder, 461 GrPipelineBuilder* pipelineBuilder,
183 GrColor color, 462 GrColor color,
184 const SkMatrix& viewMatrix, 463 const SkMatrix& viewMatrix,
185 const SkRect& rect, 464 const SkRect& rect,
186 const SkRect& devRect) { 465 const SkRect& devRect) {
187 GrPipelineBuilder::AutoRestoreEffects are(pipelineBuilder);
188
189 SkMatrix localMatrix;
190 if (!viewMatrix.invert(&localMatrix)) {
191 SkDebugf("Cannot invert\n");
192 return;
193 }
194
195 CoverageAttribType type;
196 SkAutoTUnref<const GrGeometryProcessor> gp(create_rect_gp(*pipelineBuilder, color, &type,
197 localMatrix));
198
199 size_t vertexStride = gp->getVertexStride();
200 GrDrawTarget::AutoReleaseGeometry geo(target, 8, vertexStride, 0);
201 if (!geo.succeeded()) {
202 SkDebugf("Failed to get space for vertices!\n");
203 return;
204 }
205
206 if (NULL == fAAFillRectIndexBuffer) { 466 if (NULL == fAAFillRectIndexBuffer) {
207 fAAFillRectIndexBuffer = fGpu->createInstancedIndexBuffer(gFillAARectIdx , 467 fAAFillRectIndexBuffer = fGpu->createInstancedIndexBuffer(gFillAARectIdx ,
208 kIndicesPerAAF illRect, 468 kIndicesPerAAF illRect,
209 kNumAAFillRect sInIndexBuffer, 469 kNumAAFillRect sInIndexBuffer,
210 kVertsPerAAFil lRect); 470 kVertsPerAAFil lRect);
211 } 471 }
212 GrIndexBuffer* indexBuffer = fAAFillRectIndexBuffer;
213 if (NULL == indexBuffer) {
214 SkDebugf("Failed to create index buffer!\n");
215 return;
216 }
217 472
218 intptr_t verts = reinterpret_cast<intptr_t>(geo.vertices()); 473 AAFillRectBatch::Geometry geometry;
474 geometry.fRect = rect;
475 geometry.fViewMatrix = viewMatrix;
476 geometry.fDevRect = devRect;
477 geometry.fColor = color;
219 478
220 SkPoint* fan0Pos = reinterpret_cast<SkPoint*>(verts); 479 SkAutoTUnref<GrBatch> batch(AAFillRectBatch::Create(geometry, fAAFillRectInd exBuffer));
221 SkPoint* fan1Pos = reinterpret_cast<SkPoint*>(verts + 4 * vertexStride); 480 target->drawBatch(pipelineBuilder, batch, kTriangles_GrPrimitiveType);
joshualitt 2015/01/26 15:22:20 Brian, should I be passing in devrect?
222
223 SkScalar inset = SkMinScalar(devRect.width(), SK_Scalar1);
224 inset = SK_ScalarHalf * SkMinScalar(inset, devRect.height());
225
226 if (viewMatrix.rectStaysRect()) {
227 // Temporarily #if'ed out. We don't want to pass in the devRect but
228 // right now it is computed in GrContext::apply_aa_to_rect and we don't
229 // want to throw away the work
230 #if 0
231 SkRect devRect;
232 combinedMatrix.mapRect(&devRect, rect);
233 #endif
234
235 set_inset_fan(fan0Pos, vertexStride, devRect, -SK_ScalarHalf, -SK_Scalar Half);
236 set_inset_fan(fan1Pos, vertexStride, devRect, inset, inset);
237 } else {
238 // compute transformed (1, 0) and (0, 1) vectors
239 SkVector vec[2] = {
240 { viewMatrix[SkMatrix::kMScaleX], viewMatrix[SkMatrix::kMSkewY] },
241 { viewMatrix[SkMatrix::kMSkewX], viewMatrix[SkMatrix::kMScaleY] }
242 };
243
244 vec[0].normalize();
245 vec[0].scale(SK_ScalarHalf);
246 vec[1].normalize();
247 vec[1].scale(SK_ScalarHalf);
248
249 // create the rotated rect
250 fan0Pos->setRectFan(rect.fLeft, rect.fTop,
251 rect.fRight, rect.fBottom, vertexStride);
252 viewMatrix.mapPointsWithStride(fan0Pos, vertexStride, 4);
253
254 // Now create the inset points and then outset the original
255 // rotated points
256
257 // TL
258 *((SkPoint*)((intptr_t)fan1Pos + 0 * vertexStride)) =
259 *((SkPoint*)((intptr_t)fan0Pos + 0 * vertexStride)) + vec[0] + vec[1 ];
260 *((SkPoint*)((intptr_t)fan0Pos + 0 * vertexStride)) -= vec[0] + vec[1];
261 // BL
262 *((SkPoint*)((intptr_t)fan1Pos + 1 * vertexStride)) =
263 *((SkPoint*)((intptr_t)fan0Pos + 1 * vertexStride)) + vec[0] - vec[1 ];
264 *((SkPoint*)((intptr_t)fan0Pos + 1 * vertexStride)) -= vec[0] - vec[1];
265 // BR
266 *((SkPoint*)((intptr_t)fan1Pos + 2 * vertexStride)) =
267 *((SkPoint*)((intptr_t)fan0Pos + 2 * vertexStride)) - vec[0] - vec[1 ];
268 *((SkPoint*)((intptr_t)fan0Pos + 2 * vertexStride)) += vec[0] + vec[1];
269 // TR
270 *((SkPoint*)((intptr_t)fan1Pos + 3 * vertexStride)) =
271 *((SkPoint*)((intptr_t)fan0Pos + 3 * vertexStride)) - vec[0] + vec[1 ];
272 *((SkPoint*)((intptr_t)fan0Pos + 3 * vertexStride)) += vec[0] - vec[1];
273 }
274
275 // Make verts point to vertex color and then set all the color and coverage vertex attrs values.
276 verts += sizeof(SkPoint);
277 for (int i = 0; i < 4; ++i) {
278 if (kUseCoverage_CoverageAttribType == type) {
279 *reinterpret_cast<GrColor*>(verts + i * vertexStride) = color;
280 *reinterpret_cast<float*>(verts + i * vertexStride + sizeof(GrColor) ) = 0;
281 } else {
282 *reinterpret_cast<GrColor*>(verts + i * vertexStride) = 0;
283 }
284 }
285
286 int scale;
287 if (inset < SK_ScalarHalf) {
288 scale = SkScalarFloorToInt(512.0f * inset / (inset + SK_ScalarHalf));
289 SkASSERT(scale >= 0 && scale <= 255);
290 } else {
291 scale = 0xff;
292 }
293
294 verts += 4 * vertexStride;
295
296 float innerCoverage = GrNormalizeByteToFloat(scale);
297 GrColor scaledColor = (0xff == scale) ? color : SkAlphaMulQ(color, scale);
298
299 for (int i = 0; i < 4; ++i) {
300 if (kUseCoverage_CoverageAttribType == type) {
301 *reinterpret_cast<GrColor*>(verts + i * vertexStride) = color;
302 *reinterpret_cast<float*>(verts + i * vertexStride + sizeof(GrColor) ) = innerCoverage;
303 } else {
304 *reinterpret_cast<GrColor*>(verts + i * vertexStride) = scaledColor;
305 }
306 }
307
308 target->setIndexSourceToBuffer(indexBuffer);
309 target->drawIndexedInstances(pipelineBuilder,
310 gp,
311 kTriangles_GrPrimitiveType,
312 1,
313 kVertsPerAAFillRect,
314 kIndicesPerAAFillRect);
315 target->resetIndexSource();
316 } 481 }
317 482
318 void GrAARectRenderer::strokeAARect(GrDrawTarget* target, 483 void GrAARectRenderer::strokeAARect(GrDrawTarget* target,
319 GrPipelineBuilder* pipelineBuilder, 484 GrPipelineBuilder* pipelineBuilder,
320 GrColor color, 485 GrColor color,
321 const SkMatrix& viewMatrix, 486 const SkMatrix& viewMatrix,
322 const SkRect& rect, 487 const SkRect& rect,
323 const SkRect& devRect, 488 const SkRect& devRect,
324 const SkStrokeRec& stroke) { 489 const SkStrokeRec& stroke) {
325 SkVector devStrokeSize; 490 SkVector devStrokeSize;
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375 SkRect devOutsideAssist(devRect); 540 SkRect devOutsideAssist(devRect);
376 541
377 // For bevel-stroke, use 2 SkRect instances(devOutside and devOutsideAssist) 542 // For bevel-stroke, use 2 SkRect instances(devOutside and devOutsideAssist)
378 // to draw the outer of the rect. Because there are 8 vertices on the outer 543 // to draw the outer of the rect. Because there are 8 vertices on the outer
379 // edge, while vertex number of inner edge is 4, the same as miter-stroke. 544 // edge, while vertex number of inner edge is 4, the same as miter-stroke.
380 if (!miterStroke) { 545 if (!miterStroke) {
381 devOutside.inset(0, ry); 546 devOutside.inset(0, ry);
382 devOutsideAssist.outset(0, ry); 547 devOutsideAssist.outset(0, ry);
383 } 548 }
384 549
385 this->geometryStrokeAARect(target, pipelineBuilder, color, viewMatrix, devOu tside, devOutsideAssist, 550 this->geometryStrokeAARect(target, pipelineBuilder, color, viewMatrix, devOu tside,
386 devInside, miterStroke); 551 devOutsideAssist, devInside, miterStroke);
387 } 552 }
388 553
554 static const GrGeometryProcessor* create_rect_gp(const GrPipelineBuilder& pipeln eBuilder,
555 GrColor color,
556 CoverageAttribType* type,
557 const SkMatrix& localMatrix) {
558 uint32_t flags = GrDefaultGeoProcFactory::kColor_GPType;
559 const GrGeometryProcessor* gp;
560 if (pipelneBuilder.canTweakAlphaForCoverage()) {
561 gp = GrDefaultGeoProcFactory::Create(flags, color, SkMatrix::I(), localM atrix);
562 SkASSERT(gp->getVertexStride() == sizeof(GrDefaultGeoProcFactory::Positi onColorAttr));
563 *type = kUseColor_CoverageAttribType;
564 } else {
565 flags |= GrDefaultGeoProcFactory::kCoverage_GPType;
566 gp = GrDefaultGeoProcFactory::Create(flags, color, SkMatrix::I(), localM atrix,
567 GrColorIsOpaque(color));
568 SkASSERT(gp->getVertexStride()==sizeof(GrDefaultGeoProcFactory::Position ColorCoverageAttr));
569 *type = kUseCoverage_CoverageAttribType;
570 }
571 return gp;
572 }
573
574
389 void GrAARectRenderer::geometryStrokeAARect(GrDrawTarget* target, 575 void GrAARectRenderer::geometryStrokeAARect(GrDrawTarget* target,
390 GrPipelineBuilder* pipelineBuilder, 576 GrPipelineBuilder* pipelineBuilder,
391 GrColor color, 577 GrColor color,
392 const SkMatrix& viewMatrix, 578 const SkMatrix& viewMatrix,
393 const SkRect& devOutside, 579 const SkRect& devOutside,
394 const SkRect& devOutsideAssist, 580 const SkRect& devOutsideAssist,
395 const SkRect& devInside, 581 const SkRect& devInside,
396 bool miterStroke) { 582 bool miterStroke) {
397 GrPipelineBuilder::AutoRestoreEffects are(pipelineBuilder);
398
399 SkMatrix localMatrix; 583 SkMatrix localMatrix;
400 if (!viewMatrix.invert(&localMatrix)) { 584 if (!viewMatrix.invert(&localMatrix)) {
401 SkDebugf("Cannot invert\n"); 585 SkDebugf("Cannot invert\n");
402 return; 586 return;
403 } 587 }
404 588
405 CoverageAttribType type; 589 CoverageAttribType type;
406 SkAutoTUnref<const GrGeometryProcessor> gp(create_rect_gp(*pipelineBuilder, color, &type, 590 SkAutoTUnref<const GrGeometryProcessor> gp(create_rect_gp(*pipelineBuilder, color, &type,
407 localMatrix)); 591 localMatrix));
408 592
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541 725
542 if (devInside.isEmpty()) { 726 if (devInside.isEmpty()) {
543 this->fillAARect(target, pipelineBuilder, color, viewMatrix, devOutside, 727 this->fillAARect(target, pipelineBuilder, color, viewMatrix, devOutside,
544 devOutside); 728 devOutside);
545 return; 729 return;
546 } 730 }
547 731
548 this->geometryStrokeAARect(target, pipelineBuilder, color, viewMatrix, devOu tside, 732 this->geometryStrokeAARect(target, pipelineBuilder, color, viewMatrix, devOu tside,
549 devOutsideAssist, devInside, true); 733 devOutsideAssist, devInside, true);
550 } 734 }
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