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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: tidying Created 5 years, 11 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 GrDrawState& drawState,
29 GrColor color,
30 CoverageAttribType* type,
31 const SkMatrix& localMatrix) {
32 uint32_t flags = GrDefaultGeoProcFactory::kColor_GPType;
33 const GrGeometryProcessor* gp;
34 if (drawState.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 void getInvariantOutputCoverage(GrInitInvariantOutput* out,
81 const GrBatchOpt& batchOpt) const SK_OVERRID E {
82 if (batchOpt.fCanTweakAlphaForCoverage) {
83 // uniform coverage
84 out->setKnownSingleComponent(0xff);
85 } else {
86 out->setUnknownSingleComponent();
87 }
88 }
89
90 void initBatchOpt(const GrBatchOpt& batchOpt) {
91 fBatchOpt = batchOpt;
92 }
93
94 void initBatchTracker(const GrGeometryProcessor::InitBT& init) SK_OVERRIDE {
95 // Handle any color overrides
96 if (init.fColorIgnored) {
97 fGeoData[0].fColor = GrColor_ILLEGAL;
98 } else if (GrColor_ILLEGAL != init.fOverrideColor) {
99 fGeoData[0].fColor = init.fOverrideColor;
100 }
101
102 // setup batch properties
103 fBatch.fColorIgnored = init.fColorIgnored;
104 fBatch.fColor = fGeoData[0].fColor;
105 fBatch.fUsesLocalCoords = init.fUsesLocalCoords;
106 fBatch.fCoverageIgnored = init.fCoverageIgnored;
107 }
108
109 GrColor color() const { return fBatch.fColor; }
110 bool usesLocalCoords() const { return fBatch.fUsesLocalCoords; }
111 bool canTweakAlphaForCoverage() const { return fBatchOpt.fCanTweakAlphaForCo verage; }
112 bool colorIgnored() const { return fBatch.fColorIgnored; }
113 const SkMatrix& viewMatrix() const { return fGeoData[0].fViewMatrix; }
114
115 void generateGeometry(GrBatchTarget* batchTarget, const GrOptDrawState* optS tate) SK_OVERRIDE {
116 bool canTweakAlphaForCoverage = this->canTweakAlphaForCoverage();
117
118 SkMatrix localMatrix;
119 if (!this->viewMatrix().invert(&localMatrix)) {
120 SkDebugf("Cannot invert\n");
121 return;
122 }
123
124 const GrGeometryProcessor* gp = create_fill_rect_gp(canTweakAlphaForCove rage,
125 localMatrix);
126
127 batchTarget->initDraw(gp, optState);
128 gp->unref();
129
130 // TODO this is hacky, but the only way we have to initialize the GP is to use the initBT
131 // struct so we can generate the correct shader. Once we have GrBatch e verywhere we can
132 // remove this nastiness
133 GrGeometryProcessor::InitBT init;
134 init.fColorIgnored = fBatch.fColorIgnored;
135 init.fOverrideColor = GrColor_ILLEGAL;
136 init.fCoverageIgnored = fBatch.fCoverageIgnored;
137 init.fUsesLocalCoords = this->usesLocalCoords();
138 gp->initBatchTracker(batchTarget->currentBatchTracker(), init);
139
140 size_t vertexStride = gp->getVertexStride();
141
142 SkASSERT(canTweakAlphaForCoverage ?
143 vertexStride == sizeof(GrDefaultGeoProcFactory::PositionColorAt tr) :
144 vertexStride == sizeof(GrDefaultGeoProcFactory::PositionColorCo verageAttr));
145
146 int instanceCount = fGeoData.count();
147 int vertexCount = kVertsPerAAFillRect * instanceCount;
148
149 const GrVertexBuffer* vertexBuffer;
150 int firstVertex;
151
152 void *vertices = batchTarget->vertexPool()->makeSpace(vertexStride,
153 vertexCount,
154 &vertexBuffer,
155 &firstVertex);
156
157 for (int i = 0; i < instanceCount; i++) {
158 const Geometry& args = fGeoData[i];
159 this->generateAAFillRectGeometry(vertices,
160 i * kVertsPerAAFillRect * vertexStride,
161 vertexStride,
162 args.fColor,
163 args.fViewMatrix,
164 args.fRect,
165 args.fDevRect,
166 canTweakAlphaForCoverage);
167 }
168
169 GrDrawTarget::DrawInfo drawInfo;
170 drawInfo.setPrimitiveType(kTriangles_GrPrimitiveType);
171 drawInfo.setStartVertex(0);
172 drawInfo.setStartIndex(0);
173 drawInfo.setVerticesPerInstance(kVertsPerAAFillRect);
174 drawInfo.setIndicesPerInstance(kIndicesPerAAFillRect);
175 drawInfo.adjustStartVertex(firstVertex);
176 drawInfo.setVertexBuffer(vertexBuffer);
177 drawInfo.setIndexBuffer(fIndexBuffer);
178
179 int maxInstancesPerDraw = kNumAAFillRectsInIndexBuffer;
180
181 while (instanceCount) {
182 drawInfo.setInstanceCount(SkTMin(instanceCount, maxInstancesPerDraw) );
183 drawInfo.setVertexCount(drawInfo.instanceCount() * drawInfo.vertices PerInstance());
184 drawInfo.setIndexCount(drawInfo.instanceCount() * drawInfo.indicesPe rInstance());
185
186 batchTarget->draw(drawInfo);
187
188 drawInfo.setStartVertex(drawInfo.startVertex() + drawInfo.vertexCoun t());
189 instanceCount -= drawInfo.instanceCount();
190 }
191 }
192
193 SkSTArray<1, Geometry, true>* geoData() { return &fGeoData; }
194
195 private:
196 AAFillRectBatch(const Geometry& geometry, const GrIndexBuffer* indexBuffer)
197 : fIndexBuffer(indexBuffer) {
198 this->initClassID<AAFillRectBatch>();
199 fGeoData.push_back(geometry);
200 }
201
202 bool onCombineIfPossible(GrBatch* t) SK_OVERRIDE {
203 AAFillRectBatch* that = t->cast<AAFillRectBatch>();
204 if (this->canTweakAlphaForCoverage() != that->canTweakAlphaForCoverage() ) {
205 return false;
206 }
207
208 if (this->colorIgnored() != that->colorIgnored()) {
209 return false;
210 }
211
212 if (this->usesLocalCoords() != that->usesLocalCoords()) {
213 return false;
214 }
215
216 // We apply the viewmatrix to the rect points on the cpu. However, if t he pipeline uses
217 // local coords then we won't be able to batch. We could actually uploa d the viewmatrix
218 // using vertex attributes in these cases, but haven't investigated that
219 if (this->usesLocalCoords() && !this->viewMatrix().cheapEqualTo(that->vi ewMatrix())) {
220 return false;
221 }
222
223 if (this->color() != that->color()) {
224 fBatch.fColor = GrColor_ILLEGAL;
225 }
226 fGeoData.push_back_n(that->geoData()->count(), that->geoData()->begin()) ;
227 return true;
228 }
229
230 void generateAAFillRectGeometry(void* vertices,
231 uint32_t offset,
232 uint32_t vertexStride,
233 GrColor color,
234 const SkMatrix& viewMatrix,
235 const SkRect& rect,
236 const SkRect& devRect,
237 bool tweakAlphaForCoverage) const {
238 intptr_t verts = reinterpret_cast<intptr_t>(vertices) + offset;
239
240 SkPoint* fan0Pos = reinterpret_cast<SkPoint*>(verts);
241 SkPoint* fan1Pos = reinterpret_cast<SkPoint*>(verts + 4 * vertexStride);
242
243 SkScalar inset = SkMinScalar(devRect.width(), SK_Scalar1);
244 inset = SK_ScalarHalf * SkMinScalar(inset, devRect.height());
245
246 if (viewMatrix.rectStaysRect()) {
247 set_inset_fan(fan0Pos, vertexStride, devRect, -SK_ScalarHalf, -SK_Sc alarHalf);
248 set_inset_fan(fan1Pos, vertexStride, devRect, inset, inset);
249 } else {
250 // compute transformed (1, 0) and (0, 1) vectors
251 SkVector vec[2] = {
252 { viewMatrix[SkMatrix::kMScaleX], viewMatrix[SkMatrix::kMSkewY] },
253 { viewMatrix[SkMatrix::kMSkewX], viewMatrix[SkMatrix::kMScaleY] }
254 };
255
256 vec[0].normalize();
257 vec[0].scale(SK_ScalarHalf);
258 vec[1].normalize();
259 vec[1].scale(SK_ScalarHalf);
260
261 // create the rotated rect
262 fan0Pos->setRectFan(rect.fLeft, rect.fTop,
263 rect.fRight, rect.fBottom, vertexStride);
264 viewMatrix.mapPointsWithStride(fan0Pos, vertexStride, 4);
265
266 // Now create the inset points and then outset the original
267 // rotated points
268
269 // TL
270 *((SkPoint*)((intptr_t)fan1Pos + 0 * vertexStride)) =
271 *((SkPoint*)((intptr_t)fan0Pos + 0 * vertexStride)) + vec[0] + v ec[1];
272 *((SkPoint*)((intptr_t)fan0Pos + 0 * vertexStride)) -= vec[0] + vec[ 1];
273 // BL
274 *((SkPoint*)((intptr_t)fan1Pos + 1 * vertexStride)) =
275 *((SkPoint*)((intptr_t)fan0Pos + 1 * vertexStride)) + vec[0] - v ec[1];
276 *((SkPoint*)((intptr_t)fan0Pos + 1 * vertexStride)) -= vec[0] - vec[ 1];
277 // BR
278 *((SkPoint*)((intptr_t)fan1Pos + 2 * vertexStride)) =
279 *((SkPoint*)((intptr_t)fan0Pos + 2 * vertexStride)) - vec[0] - v ec[1];
280 *((SkPoint*)((intptr_t)fan0Pos + 2 * vertexStride)) += vec[0] + vec[ 1];
281 // TR
282 *((SkPoint*)((intptr_t)fan1Pos + 3 * vertexStride)) =
283 *((SkPoint*)((intptr_t)fan0Pos + 3 * vertexStride)) - vec[0] + v ec[1];
284 *((SkPoint*)((intptr_t)fan0Pos + 3 * vertexStride)) += vec[0] - vec[ 1];
285 }
286
287 // Make verts point to vertex color and then set all the color and cover age vertex attrs
288 // values.
289 verts += sizeof(SkPoint);
290 for (int i = 0; i < 4; ++i) {
291 if (tweakAlphaForCoverage) {
292 *reinterpret_cast<GrColor*>(verts + i * vertexStride) = 0;
293 } else {
294 *reinterpret_cast<GrColor*>(verts + i * vertexStride) = color;
295 *reinterpret_cast<float*>(verts + i * vertexStride + sizeof(GrCo lor)) = 0;
296 }
297 }
298
299 int scale;
300 if (inset < SK_ScalarHalf) {
301 scale = SkScalarFloorToInt(512.0f * inset / (inset + SK_ScalarHalf)) ;
302 SkASSERT(scale >= 0 && scale <= 255);
303 } else {
304 scale = 0xff;
305 }
306
307 verts += 4 * vertexStride;
308
309 float innerCoverage = GrNormalizeByteToFloat(scale);
310 GrColor scaledColor = (0xff == scale) ? color : SkAlphaMulQ(color, scale );
311
312 for (int i = 0; i < 4; ++i) {
313 if (tweakAlphaForCoverage) {
314 *reinterpret_cast<GrColor*>(verts + i * vertexStride) = scaledCo lor;
315 } else {
316 *reinterpret_cast<GrColor*>(verts + i * vertexStride) = color;
317 *reinterpret_cast<float*>(verts + i * vertexStride +
318 sizeof(GrColor)) = innerCoverage;
319 }
320 }
321 }
322
323 struct BatchTracker {
324 GrColor fColor;
325 bool fUsesLocalCoords;
326 bool fColorIgnored;
327 bool fCoverageIgnored;
328 };
329
330 GrBatchOpt fBatchOpt;
331 BatchTracker fBatch;
332 const GrIndexBuffer* fIndexBuffer;
333 SkSTArray<1, Geometry, true> fGeoData;
334 };
335
336 namespace {
337 // Should the coverage be multiplied into the color attrib or use a separate att rib.
338 enum CoverageAttribType {
339 kUseColor_CoverageAttribType,
340 kUseCoverage_CoverageAttribType,
341 };
342 }
343
344 void GrAARectRenderer::reset() {
345 SkSafeSetNull(fAAFillRectIndexBuffer);
346 SkSafeSetNull(fAAMiterStrokeRectIndexBuffer);
347 SkSafeSetNull(fAABevelStrokeRectIndexBuffer);
348 }
349
72 static const uint16_t gMiterStrokeAARectIdx[] = { 350 static const uint16_t gMiterStrokeAARectIdx[] = {
73 0 + 0, 1 + 0, 5 + 0, 5 + 0, 4 + 0, 0 + 0, 351 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, 352 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, 353 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, 354 3 + 0, 0 + 0, 4 + 0, 4 + 0, 7 + 0, 3 + 0,
77 355
78 0 + 4, 1 + 4, 5 + 4, 5 + 4, 4 + 4, 0 + 4, 356 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, 357 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, 358 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, 359 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; 455 return fAABevelStrokeRectIndexBuffer;
178 } 456 }
179 } 457 }
180 458
181 void GrAARectRenderer::geometryFillAARect(GrDrawTarget* target, 459 void GrAARectRenderer::geometryFillAARect(GrDrawTarget* target,
182 GrDrawState* drawState, 460 GrDrawState* drawState,
183 GrColor color, 461 GrColor color,
184 const SkMatrix& viewMatrix, 462 const SkMatrix& viewMatrix,
185 const SkRect& rect, 463 const SkRect& rect,
186 const SkRect& devRect) { 464 const SkRect& devRect) {
187 GrDrawState::AutoRestoreEffects are(drawState);
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(*drawState, 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) { 465 if (NULL == fAAFillRectIndexBuffer) {
207 fAAFillRectIndexBuffer = fGpu->createInstancedIndexBuffer(gFillAARectIdx , 466 fAAFillRectIndexBuffer = fGpu->createInstancedIndexBuffer(gFillAARectIdx ,
208 kIndicesPerAAF illRect, 467 kIndicesPerAAF illRect,
209 kNumAAFillRect sInIndexBuffer, 468 kNumAAFillRect sInIndexBuffer,
210 kVertsPerAAFil lRect); 469 kVertsPerAAFil lRect);
211 } 470 }
212 GrIndexBuffer* indexBuffer = fAAFillRectIndexBuffer;
213 if (NULL == indexBuffer) {
214 SkDebugf("Failed to create index buffer!\n");
215 return;
216 }
217 471
218 intptr_t verts = reinterpret_cast<intptr_t>(geo.vertices()); 472 AAFillRectBatch::Geometry geometry;
473 geometry.fRect = rect;
474 geometry.fViewMatrix = viewMatrix;
475 geometry.fDevRect = devRect;
476 geometry.fColor = color;
219 477
220 SkPoint* fan0Pos = reinterpret_cast<SkPoint*>(verts); 478 SkAutoTUnref<GrBatch> batch(AAFillRectBatch::Create(geometry, fAAFillRectInd exBuffer));
221 SkPoint* fan1Pos = reinterpret_cast<SkPoint*>(verts + 4 * vertexStride); 479 target->drawBatch(drawState, batch, kTriangles_GrPrimitiveType, &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(drawState,
310 gp,
311 kTriangles_GrPrimitiveType,
312 1,
313 kVertsPerAAFillRect,
314 kIndicesPerAAFillRect);
315 target->resetIndexSource();
316 } 480 }
317 481
318 void GrAARectRenderer::strokeAARect(GrDrawTarget* target, 482 void GrAARectRenderer::strokeAARect(GrDrawTarget* target,
319 GrDrawState* drawState, 483 GrDrawState* drawState,
320 GrColor color, 484 GrColor color,
321 const SkMatrix& viewMatrix, 485 const SkMatrix& viewMatrix,
322 const SkRect& rect, 486 const SkRect& rect,
323 const SkRect& devRect, 487 const SkRect& devRect,
324 const SkStrokeRec& stroke) { 488 const SkStrokeRec& stroke) {
325 SkVector devStrokeSize; 489 SkVector devStrokeSize;
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379 // edge, while vertex number of inner edge is 4, the same as miter-stroke. 543 // edge, while vertex number of inner edge is 4, the same as miter-stroke.
380 if (!miterStroke) { 544 if (!miterStroke) {
381 devOutside.inset(0, ry); 545 devOutside.inset(0, ry);
382 devOutsideAssist.outset(0, ry); 546 devOutsideAssist.outset(0, ry);
383 } 547 }
384 548
385 this->geometryStrokeAARect(target, drawState, color, viewMatrix, devOutside, devOutsideAssist, 549 this->geometryStrokeAARect(target, drawState, color, viewMatrix, devOutside, devOutsideAssist,
386 devInside, miterStroke); 550 devInside, miterStroke);
387 } 551 }
388 552
553 static const GrGeometryProcessor* create_rect_gp(const GrDrawState& drawState,
554 GrColor color,
555 CoverageAttribType* type,
556 const SkMatrix& localMatrix) {
557 uint32_t flags = GrDefaultGeoProcFactory::kColor_GPType;
558 const GrGeometryProcessor* gp;
559 if (drawState.canTweakAlphaForCoverage()) {
560 gp = GrDefaultGeoProcFactory::Create(flags, color, SkMatrix::I(), localM atrix);
561 SkASSERT(gp->getVertexStride() == sizeof(GrDefaultGeoProcFactory::Positi onColorAttr));
562 *type = kUseColor_CoverageAttribType;
563 } else {
564 flags |= GrDefaultGeoProcFactory::kCoverage_GPType;
565 gp = GrDefaultGeoProcFactory::Create(flags, color, SkMatrix::I(), localM atrix,
566 GrColorIsOpaque(color));
567 SkASSERT(gp->getVertexStride()==sizeof(GrDefaultGeoProcFactory::Position ColorCoverageAttr));
568 *type = kUseCoverage_CoverageAttribType;
569 }
570 return gp;
571 }
572
573
389 void GrAARectRenderer::geometryStrokeAARect(GrDrawTarget* target, 574 void GrAARectRenderer::geometryStrokeAARect(GrDrawTarget* target,
390 GrDrawState* drawState, 575 GrDrawState* drawState,
391 GrColor color, 576 GrColor color,
392 const SkMatrix& viewMatrix, 577 const SkMatrix& viewMatrix,
393 const SkRect& devOutside, 578 const SkRect& devOutside,
394 const SkRect& devOutsideAssist, 579 const SkRect& devOutsideAssist,
395 const SkRect& devInside, 580 const SkRect& devInside,
396 bool miterStroke) { 581 bool miterStroke) {
397 GrDrawState::AutoRestoreEffects are(drawState);
398
399 SkMatrix localMatrix; 582 SkMatrix localMatrix;
400 if (!viewMatrix.invert(&localMatrix)) { 583 if (!viewMatrix.invert(&localMatrix)) {
401 SkDebugf("Cannot invert\n"); 584 SkDebugf("Cannot invert\n");
402 return; 585 return;
403 } 586 }
404 587
405 CoverageAttribType type; 588 CoverageAttribType type;
406 SkAutoTUnref<const GrGeometryProcessor> gp(create_rect_gp(*drawState, color, &type, 589 SkAutoTUnref<const GrGeometryProcessor> gp(create_rect_gp(*drawState, color, &type,
407 localMatrix)); 590 localMatrix));
408 591
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541 724
542 if (devInside.isEmpty()) { 725 if (devInside.isEmpty()) {
543 this->fillAARect(target, drawState, color, viewMatrix, devOutside, 726 this->fillAARect(target, drawState, color, viewMatrix, devOutside,
544 devOutside); 727 devOutside);
545 return; 728 return;
546 } 729 }
547 730
548 this->geometryStrokeAARect(target, drawState, color, viewMatrix, devOutside, devOutsideAssist, 731 this->geometryStrokeAARect(target, drawState, color, viewMatrix, devOutside, devOutsideAssist,
549 devInside, true); 732 devInside, true);
550 } 733 }
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