OLD | NEW |
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1 | 1 |
2 /* | 2 /* |
3 * Copyright 2013 Google Inc. | 3 * Copyright 2013 Google Inc. |
4 * | 4 * |
5 * Use of this source code is governed by a BSD-style license that can be | 5 * Use of this source code is governed by a BSD-style license that can be |
6 * found in the LICENSE file. | 6 * found in the LICENSE file. |
7 */ | 7 */ |
8 | 8 |
9 // This test only works with the GPU backend. | 9 // This test only works with the GPU backend. |
10 | 10 |
11 #include "gm.h" | 11 #include "gm.h" |
12 | 12 |
13 #if SK_SUPPORT_GPU && 0 // Can be enabled when cubic effect is checked in. | 13 #if SK_SUPPORT_GPU && 1 // Can be enabled when cubic effect is checked in. |
bsalomon
2013/08/23 17:21:12
Let's just remove the everything on this line afte
| |
14 | 14 |
15 #include "GrContext.h" | 15 #include "GrContext.h" |
16 #include "GrPathUtils.h" | 16 #include "GrPathUtils.h" |
17 #include "GrTest.h" | 17 #include "GrTest.h" |
18 #include "SkColorPriv.h" | 18 #include "SkColorPriv.h" |
19 #include "SkDevice.h" | 19 #include "SkDevice.h" |
20 #include "SkGeometry.h" | |
21 | |
22 #include "effects/GrBezierEffect.h" | |
20 | 23 |
21 // Position & KLM line eq values. These are the vertex attributes for Bezier cur ves. The last value | 24 // Position & KLM line eq values. These are the vertex attributes for Bezier cur ves. The last value |
22 // of the Vec4f is ignored. | 25 // of the Vec4f is ignored. |
23 extern const GrVertexAttrib kAttribs[] = { | 26 extern const GrVertexAttrib kAttribs[] = { |
24 {kVec2f_GrVertexAttribType, 0, kPosition_GrVertexAttribBinding}, | 27 {kVec2f_GrVertexAttribType, 0, kPosition_GrVertexAttribBinding}, |
25 {kVec4f_GrVertexAttribType, sizeof(GrPoint), kEffect_GrVertexAttribBinding} | 28 {kVec4f_GrVertexAttribType, sizeof(GrPoint), kEffect_GrVertexAttribBinding} |
26 }; | 29 }; |
27 | 30 |
28 static inline SkScalar eval_line(const SkPoint& p, const SkScalar lineEq[3], SkS calar sign) { | 31 static inline SkScalar eval_line(const SkPoint& p, const SkScalar lineEq[3], SkS calar sign) { |
29 return sign * (lineEq[0] * p.fX + lineEq[1] * p.fY + lineEq[2]); | 32 return sign * (lineEq[0] * p.fX + lineEq[1] * p.fY + lineEq[2]); |
30 } | 33 } |
31 | 34 |
32 namespace skiagm { | 35 namespace skiagm { |
33 /** | 36 /** |
34 * This GM directly exercises effects that draw Bezier curves in the GPU backend . | 37 * This GM directly exercises effects that draw Bezier curves in the GPU backend . |
35 */ | 38 */ |
36 class BezierEffects : public GM { | 39 class BezierCubicEffects : public GM { |
37 public: | 40 public: |
38 BezierEffects() { | 41 BezierCubicEffects() { |
39 this->setBGColor(0xFFFFFFFF); | 42 this->setBGColor(0xFFFFFFFF); |
40 } | 43 } |
41 | 44 |
42 protected: | 45 protected: |
43 virtual SkString onShortName() SK_OVERRIDE { | 46 virtual SkString onShortName() SK_OVERRIDE { |
44 return SkString("bezier_effects"); | 47 return SkString("bezier_cubic_effects"); |
45 } | 48 } |
46 | 49 |
47 virtual SkISize onISize() SK_OVERRIDE { | 50 virtual SkISize onISize() SK_OVERRIDE { |
48 return make_isize(800, 800); | 51 return make_isize(800, 800); |
49 } | 52 } |
50 | 53 |
51 virtual uint32_t onGetFlags() const SK_OVERRIDE { | 54 virtual uint32_t onGetFlags() const SK_OVERRIDE { |
52 // This is a GPU-specific GM. | 55 // This is a GPU-specific GM. |
53 return kGPUOnly_Flag; | 56 return kGPUOnly_Flag; |
54 } | 57 } |
55 | 58 |
56 | 59 |
57 virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE { | 60 virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE { |
58 SkDevice* device = canvas->getTopDevice(); | 61 SkDevice* device = canvas->getTopDevice(); |
59 GrRenderTarget* rt = device->accessRenderTarget(); | 62 GrRenderTarget* rt = device->accessRenderTarget(); |
60 if (NULL == rt) { | 63 if (NULL == rt) { |
61 return; | 64 return; |
62 } | 65 } |
63 GrContext* context = rt->getContext(); | 66 GrContext* context = rt->getContext(); |
64 if (NULL == context) { | 67 if (NULL == context) { |
65 return; | 68 return; |
66 } | 69 } |
67 | 70 |
68 struct Vertex { | 71 struct Vertex { |
69 SkPoint fPosition; | 72 SkPoint fPosition; |
70 float fKLM[4]; // The last value is ignored. The effect expects a vec4f. | 73 float fKLM[4]; // The last value is ignored. The effect expects a vec4f. |
71 }; | 74 }; |
72 | 75 |
73 static const int kNumCubics = 10; | 76 static const int kNumCubics = 15; |
74 SkMWCRandom rand; | 77 SkMWCRandom rand; |
75 | 78 |
76 int numCols = SkScalarCeilToInt(SkScalarSqrt(SkIntToScalar(kNumCubics))) ; | 79 // Mult by 3 for each edge effect type |
77 int numRows = SkScalarCeilToInt(SkIntToScalar(kNumCubics) / numCols); | 80 int numCols = SkScalarCeilToInt(SkScalarSqrt(SkIntToScalar(kNumCubics*3) )); |
81 int numRows = SkScalarCeilToInt(SkIntToScalar(kNumCubics*3) / numCols); | |
78 SkScalar w = SkIntToScalar(rt->width()) / numCols; | 82 SkScalar w = SkIntToScalar(rt->width()) / numCols; |
79 SkScalar h = SkIntToScalar(rt->height()) / numRows; | 83 SkScalar h = SkIntToScalar(rt->height()) / numRows; |
80 int row = 0; | 84 int row = 0; |
81 int col = 0; | 85 int col = 0; |
82 | 86 |
83 for (int i = 0; i < kNumCubics; ++i) { | 87 for (int i = 0; i < kNumCubics; ++i) { |
84 SkScalar x = SkScalarMul(col, w); | 88 SkPoint baseControlPts[] = { |
85 SkScalar y = SkScalarMul(row, h); | 89 {rand.nextRangeF(0.f, w), rand.nextRangeF(0.f, h)}, |
86 SkPoint controlPts[] = { | 90 {rand.nextRangeF(0.f, w), rand.nextRangeF(0.f, h)}, |
87 {x + rand.nextRangeF(0, w), y + rand.nextRangeF(0, h)}, | 91 {rand.nextRangeF(0.f, w), rand.nextRangeF(0.f, h)}, |
88 {x + rand.nextRangeF(0, w), y + rand.nextRangeF(0, h)}, | 92 {rand.nextRangeF(0.f, w), rand.nextRangeF(0.f, h)} |
89 {x + rand.nextRangeF(0, w), y + rand.nextRangeF(0, h)}, | |
90 {x + rand.nextRangeF(0, w), y + rand.nextRangeF(0, h)} | |
91 }; | 93 }; |
92 SkPoint chopped[10]; | 94 for(int edgeType = kFillAA_GrBezierEdgeType; edgeType < 3; ++edgeTyp e) { |
93 SkScalar klmEqs[9]; | 95 SkScalar x = SkScalarMul(col, w); |
94 SkScalar klmSigns[3]; | 96 SkScalar y = SkScalarMul(row, h); |
95 int cnt = GrPathUtils::chopCubicAtLoopIntersection(controlPts, | 97 SkPoint controlPts[] = { |
96 chopped, | 98 {x + baseControlPts[0].fX, y + baseControlPts[0].fY}, |
97 klmEqs, | 99 {x + baseControlPts[1].fX, y + baseControlPts[1].fY}, |
98 klmSigns, | 100 {x + baseControlPts[2].fX, y + baseControlPts[2].fY}, |
99 controlPts); | 101 {x + baseControlPts[3].fX, y + baseControlPts[3].fY} |
100 | 102 }; |
101 SkPaint ctrlPtPaint; | 103 SkPoint chopped[10]; |
102 ctrlPtPaint.setColor(rand.nextU() | 0xFF000000); | 104 SkScalar klmEqs[9]; |
103 for (int i = 0; i < 4; ++i) { | 105 SkScalar klmSigns[3]; |
104 canvas->drawCircle(controlPts[i].fX, controlPts[i].fY, 6.f, ctrl PtPaint); | 106 int cnt = GrPathUtils::chopCubicAtLoopIntersection(controlPts, |
105 } | 107 chopped, |
106 | 108 klmEqs, |
107 SkPaint polyPaint; | 109 klmSigns); |
108 polyPaint.setColor(0xffA0A0A0); | 110 |
109 polyPaint.setStrokeWidth(0); | 111 SkPaint ctrlPtPaint; |
110 polyPaint.setStyle(SkPaint::kStroke_Style); | 112 ctrlPtPaint.setColor(rand.nextU() | 0xFF000000); |
111 canvas->drawPoints(SkCanvas::kPolygon_PointMode, 4, controlPts, poly Paint); | |
112 | |
113 SkPaint choppedPtPaint; | |
114 choppedPtPaint.setColor(~ctrlPtPaint.getColor() | 0xFF000000); | |
115 | |
116 for (int c = 0; c < cnt; ++c) { | |
117 SkPoint* pts = chopped + 3 * c; | |
118 | |
119 for (int i = 0; i < 4; ++i) { | 113 for (int i = 0; i < 4; ++i) { |
120 canvas->drawCircle(pts[i].fX, pts[i].fY, 3.f, choppedPtPaint ); | 114 canvas->drawCircle(controlPts[i].fX, controlPts[i].fY, 6.f, ctrlPtPaint); |
121 } | 115 } |
122 | 116 |
123 SkRect bounds; | 117 SkPaint polyPaint; |
124 bounds.set(pts, 4); | 118 polyPaint.setColor(0xffA0A0A0); |
125 | 119 polyPaint.setStrokeWidth(0); |
126 SkPaint boundsPaint; | 120 polyPaint.setStyle(SkPaint::kStroke_Style); |
127 boundsPaint.setColor(0xff808080); | 121 canvas->drawPoints(SkCanvas::kPolygon_PointMode, 4, controlPts, polyPaint); |
128 boundsPaint.setStrokeWidth(0); | 122 |
129 boundsPaint.setStyle(SkPaint::kStroke_Style); | 123 SkPaint choppedPtPaint; |
130 canvas->drawRect(bounds, boundsPaint); | 124 choppedPtPaint.setColor(~ctrlPtPaint.getColor() | 0xFF000000); |
131 | 125 |
132 Vertex verts[4]; | 126 for (int c = 0; c < cnt; ++c) { |
133 verts[0].fPosition.setRectFan(bounds.fLeft, bounds.fTop, | 127 SkPoint* pts = chopped + 3 * c; |
134 bounds.fRight, bounds.fBottom, | 128 |
135 sizeof(Vertex)); | 129 for (int i = 0; i < 4; ++i) { |
136 for (int v = 0; v < 4; ++v) { | 130 canvas->drawCircle(pts[i].fX, pts[i].fY, 3.f, choppedPtP aint); |
137 verts[v].fKLM[0] = eval_line(verts[v].fPosition, klmEqs + 0, klmSigns[c]); | 131 } |
138 verts[v].fKLM[1] = eval_line(verts[v].fPosition, klmEqs + 3, klmSigns[c]); | 132 |
139 verts[v].fKLM[2] = eval_line(verts[v].fPosition, klmEqs + 6, 1.f); | 133 SkRect bounds; |
140 } | 134 bounds.set(pts, 4); |
141 | 135 |
142 GrTestTarget tt; | 136 SkPaint boundsPaint; |
143 context->getTestTarget(&tt); | 137 boundsPaint.setColor(0xff808080); |
144 if (NULL == tt.target()) { | 138 boundsPaint.setStrokeWidth(0); |
145 continue; | 139 boundsPaint.setStyle(SkPaint::kStroke_Style); |
146 } | 140 canvas->drawRect(bounds, boundsPaint); |
147 GrDrawState* drawState = tt.target()->drawState(); | 141 |
148 drawState->setVertexAttribs<kAttribs>(2); | 142 Vertex verts[4]; |
149 SkAutoTUnref<GrEffectRef> effect(HairCubicEdgeEffect::Create()); | 143 verts[0].fPosition.setRectFan(bounds.fLeft, bounds.fTop, |
150 if (!effect) { | 144 bounds.fRight, bounds.fBottom, |
151 continue; | 145 sizeof(Vertex)); |
152 } | 146 for (int v = 0; v < 4; ++v) { |
153 drawState->addCoverageEffect(effect, 1); | 147 verts[v].fKLM[0] = eval_line(verts[v].fPosition, klmEqs + 0, klmSigns[c]); |
154 drawState->setRenderTarget(rt); | 148 verts[v].fKLM[1] = eval_line(verts[v].fPosition, klmEqs + 3, klmSigns[c]); |
155 drawState->setColor(0xff000000); | 149 verts[v].fKLM[2] = eval_line(verts[v].fPosition, klmEqs + 6, 1.f); |
156 | 150 } |
157 tt.target()->setVertexSourceToArray(verts, 4); | 151 |
158 tt.target()->setIndexSourceToBuffer(context->getQuadIndexBuffer( )); | 152 GrTestTarget tt; |
159 tt.target()->drawIndexed(kTriangleFan_GrPrimitiveType, 0, 0, 4, 6); | 153 context->getTestTarget(&tt); |
160 } | 154 if (NULL == tt.target()) { |
161 ++col; | 155 continue; |
162 if (numCols == col) { | 156 } |
163 col = 0; | 157 GrDrawState* drawState = tt.target()->drawState(); |
164 ++row; | 158 drawState->setVertexAttribs<kAttribs>(2); |
159 | |
160 SkAutoTUnref<GrEffectRef> effect(GrCubicEffect::Create( | |
161 GrBezierEdgeType(edgeType), *tt.target()->caps())); | |
162 if (!effect) { | |
163 continue; | |
164 } | |
165 drawState->addCoverageEffect(effect, 1); | |
166 drawState->setRenderTarget(rt); | |
167 drawState->setColor(0xff000000); | |
168 | |
169 tt.target()->setVertexSourceToArray(verts, 4); | |
170 tt.target()->setIndexSourceToBuffer(context->getQuadIndexBuf fer()); | |
171 tt.target()->drawIndexed(kTriangleFan_GrPrimitiveType, 0, 0, 4, 6); | |
172 } | |
173 ++col; | |
174 if (numCols == col) { | |
175 col = 0; | |
176 ++row; | |
177 } | |
165 } | 178 } |
166 } | 179 } |
167 } | 180 } |
168 | 181 |
169 private: | 182 private: |
170 typedef GM INHERITED; | 183 typedef GM INHERITED; |
171 }; | 184 }; |
172 | 185 |
173 ////////////////////////////////////////////////////////////////////////////// | 186 ////////////////////////////////////////////////////////////////////////////// |
174 | 187 |
175 DEF_GM( return SkNEW(BezierEffects); ) | 188 /** |
189 * This GM directly exercises effects that draw Bezier curves in the GPU backend . | |
190 */ | |
191 class BezierConicEffects : public GM { | |
192 public: | |
193 BezierConicEffects() { | |
194 this->setBGColor(0xFFFFFFFF); | |
195 } | |
196 | |
197 protected: | |
198 virtual SkString onShortName() SK_OVERRIDE { | |
199 return SkString("bezier_conic_effects"); | |
200 } | |
201 | |
202 virtual SkISize onISize() SK_OVERRIDE { | |
203 return make_isize(800, 800); | |
204 } | |
205 | |
206 virtual uint32_t onGetFlags() const SK_OVERRIDE { | |
207 // This is a GPU-specific GM. | |
208 return kGPUOnly_Flag; | |
209 } | |
210 | |
211 | |
212 virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE { | |
213 SkDevice* device = canvas->getTopDevice(); | |
214 GrRenderTarget* rt = device->accessRenderTarget(); | |
215 if (NULL == rt) { | |
216 return; | |
217 } | |
218 GrContext* context = rt->getContext(); | |
219 if (NULL == context) { | |
220 return; | |
221 } | |
222 | |
223 struct Vertex { | |
224 SkPoint fPosition; | |
225 float fKLM[4]; // The last value is ignored. The effect expects a vec4f. | |
226 }; | |
227 | |
228 static const int kNumConics = 10; | |
229 SkMWCRandom rand; | |
230 | |
231 // Mult by 3 for each edge effect type | |
232 int numCols = SkScalarCeilToInt(SkScalarSqrt(SkIntToScalar(kNumConics*3) )); | |
233 int numRows = SkScalarCeilToInt(SkIntToScalar(kNumConics*3) / numCols); | |
234 SkScalar w = SkIntToScalar(rt->width()) / numCols; | |
235 SkScalar h = SkIntToScalar(rt->height()) / numRows; | |
236 int row = 0; | |
237 int col = 0; | |
238 | |
239 for (int i = 0; i < kNumConics; ++i) { | |
240 SkPoint baseControlPts[] = { | |
241 {rand.nextRangeF(0.f, w), rand.nextRangeF(0.f, h)}, | |
242 {rand.nextRangeF(0.f, w), rand.nextRangeF(0.f, h)}, | |
243 {rand.nextRangeF(0.f, w), rand.nextRangeF(0.f, h)} | |
244 }; | |
245 SkScalar weight = rand.nextRangeF(0.f, 2.f); | |
246 for(int edgeType = kFillAA_GrBezierEdgeType; edgeType < 3; ++edgeTyp e) { | |
247 SkScalar x = SkScalarMul(col, w); | |
248 SkScalar y = SkScalarMul(row, h); | |
249 SkPoint controlPts[] = { | |
250 {x + baseControlPts[0].fX, y + baseControlPts[0].fY}, | |
251 {x + baseControlPts[1].fX, y + baseControlPts[1].fY}, | |
252 {x + baseControlPts[2].fX, y + baseControlPts[2].fY} | |
253 }; | |
254 SkConic dst[4]; | |
255 SkScalar klmEqs[9]; | |
256 int cnt = chop_conic(controlPts, dst, weight); | |
257 GrPathUtils::getConicKLM(controlPts, weight, klmEqs); | |
258 | |
259 SkPaint ctrlPtPaint; | |
260 ctrlPtPaint.setColor(rand.nextU() | 0xFF000000); | |
261 for (int i = 0; i < 3; ++i) { | |
262 canvas->drawCircle(controlPts[i].fX, controlPts[i].fY, 6.f, ctrlPtPaint); | |
263 } | |
264 | |
265 SkPaint polyPaint; | |
266 polyPaint.setColor(0xffA0A0A0); | |
267 polyPaint.setStrokeWidth(0); | |
268 polyPaint.setStyle(SkPaint::kStroke_Style); | |
269 canvas->drawPoints(SkCanvas::kPolygon_PointMode, 3, controlPts, polyPaint); | |
270 | |
271 SkPaint choppedPtPaint; | |
272 choppedPtPaint.setColor(~ctrlPtPaint.getColor() | 0xFF000000); | |
273 | |
274 for (int c = 0; c < cnt; ++c) { | |
275 SkPoint* pts = dst[c].fPts; | |
276 for (int i = 0; i < 3; ++i) { | |
277 canvas->drawCircle(pts[i].fX, pts[i].fY, 3.f, choppedPtP aint); | |
278 } | |
279 | |
280 SkRect bounds; | |
281 //SkPoint bPts[] = {{0.f, 0.f}, {800.f, 800.f}}; | |
282 //bounds.set(bPts, 2); | |
283 bounds.set(pts, 3); | |
284 | |
285 SkPaint boundsPaint; | |
286 boundsPaint.setColor(0xff808080); | |
287 boundsPaint.setStrokeWidth(0); | |
288 boundsPaint.setStyle(SkPaint::kStroke_Style); | |
289 canvas->drawRect(bounds, boundsPaint); | |
290 | |
291 Vertex verts[4]; | |
292 verts[0].fPosition.setRectFan(bounds.fLeft, bounds.fTop, | |
293 bounds.fRight, bounds.fBottom, | |
294 sizeof(Vertex)); | |
295 for (int v = 0; v < 4; ++v) { | |
296 verts[v].fKLM[0] = eval_line(verts[v].fPosition, klmEqs + 0, 1.f); | |
297 verts[v].fKLM[1] = eval_line(verts[v].fPosition, klmEqs + 3, 1.f); | |
298 verts[v].fKLM[2] = eval_line(verts[v].fPosition, klmEqs + 6, 1.f); | |
299 } | |
300 | |
301 GrTestTarget tt; | |
302 context->getTestTarget(&tt); | |
303 if (NULL == tt.target()) { | |
304 continue; | |
305 } | |
306 GrDrawState* drawState = tt.target()->drawState(); | |
307 drawState->setVertexAttribs<kAttribs>(2); | |
308 | |
309 SkAutoTUnref<GrEffectRef> effect(GrConicEffect::Create( | |
310 GrBezierEdgeType(edgeType), *tt.target()->caps())); | |
311 if (!effect) { | |
312 continue; | |
313 } | |
314 drawState->addCoverageEffect(effect, 1); | |
315 drawState->setRenderTarget(rt); | |
316 drawState->setColor(0xff000000); | |
317 | |
318 tt.target()->setVertexSourceToArray(verts, 4); | |
319 tt.target()->setIndexSourceToBuffer(context->getQuadIndexBuf fer()); | |
320 tt.target()->drawIndexed(kTriangleFan_GrPrimitiveType, 0, 0, 4, 6); | |
321 } | |
322 ++col; | |
323 if (numCols == col) { | |
324 col = 0; | |
325 ++row; | |
326 } | |
327 } | |
328 } | |
329 } | |
330 | |
331 private: | |
332 // Uses the max curvature function for quads to estimate | |
333 // where to chop the conic. If the max curvature is not | |
334 // found along the curve segment it will return 1 and | |
335 // dst[0] is the original conic. If it returns 2 the dst[0] | |
336 // and dst[1] are the two new conics. | |
337 int split_conic(const SkPoint src[3], SkConic dst[2], const SkScalar weight) { | |
338 SkScalar t = SkFindQuadMaxCurvature(src); | |
339 if (t == 0) { | |
340 if (dst) { | |
341 dst[0].set(src, weight); | |
342 } | |
343 return 1; | |
344 } else { | |
345 if (dst) { | |
346 SkConic conic; | |
347 conic.set(src, weight); | |
348 conic.chopAt(t, dst); | |
349 } | |
350 return 2; | |
351 } | |
352 } | |
353 | |
354 // Calls split_conic on the entire conic and then once more on each subsecti on. | |
355 // Most cases will result in either 1 conic (chop point is not within t rang e) | |
356 // or 3 points (split once and then one subsection is split again). | |
357 int chop_conic(const SkPoint src[3], SkConic dst[4], const SkScalar weight) { | |
358 SkConic dstTemp[2]; | |
359 int conicCnt = split_conic(src, dstTemp, weight); | |
360 if (2 == conicCnt) { | |
361 int conicCnt2 = split_conic(dstTemp[0].fPts, dst, dstTemp[0].fW); | |
362 conicCnt = conicCnt2 + split_conic(dstTemp[1].fPts, &dst[conicCnt2], dstTemp[1].fW); | |
363 } else { | |
364 dst[0] = dstTemp[0]; | |
365 } | |
366 return conicCnt; | |
367 } | |
368 | |
369 typedef GM INHERITED; | |
370 }; | |
371 | |
372 ////////////////////////////////////////////////////////////////////////////// | |
373 /** | |
374 * This GM directly exercises effects that draw Bezier quad curves in the GPU ba ckend. | |
375 */ | |
376 class BezierQuadEffects : public GM { | |
377 public: | |
378 BezierQuadEffects() { | |
379 this->setBGColor(0xFFFFFFFF); | |
380 } | |
381 | |
382 protected: | |
383 virtual SkString onShortName() SK_OVERRIDE { | |
384 return SkString("bezier_quad_effects"); | |
385 } | |
386 | |
387 virtual SkISize onISize() SK_OVERRIDE { | |
388 return make_isize(800, 800); | |
389 } | |
390 | |
391 virtual uint32_t onGetFlags() const SK_OVERRIDE { | |
392 // This is a GPU-specific GM. | |
393 return kGPUOnly_Flag; | |
394 } | |
395 | |
396 | |
397 virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE { | |
398 SkDevice* device = canvas->getTopDevice(); | |
399 GrRenderTarget* rt = device->accessRenderTarget(); | |
400 if (NULL == rt) { | |
401 return; | |
402 } | |
403 GrContext* context = rt->getContext(); | |
404 if (NULL == context) { | |
405 return; | |
406 } | |
407 | |
408 struct Vertex { | |
409 SkPoint fPosition; | |
410 float fUV[4]; // The last two values are ignored. The effect expec ts a vec4f. | |
411 }; | |
412 | |
413 static const int kNumQuads = 5; | |
414 SkMWCRandom rand; | |
415 | |
416 int numCols = SkScalarCeilToInt(SkScalarSqrt(SkIntToScalar(kNumQuads*3)) ); | |
417 int numRows = SkScalarCeilToInt(SkIntToScalar(kNumQuads*3) / numCols); | |
418 SkScalar w = SkIntToScalar(rt->width()) / numCols; | |
419 SkScalar h = SkIntToScalar(rt->height()) / numRows; | |
420 int row = 0; | |
421 int col = 0; | |
422 | |
423 for (int i = 0; i < kNumQuads; ++i) { | |
424 SkPoint baseControlPts[] = { | |
425 {rand.nextRangeF(0.f, w), rand.nextRangeF(0.f, h)}, | |
426 {rand.nextRangeF(0.f, w), rand.nextRangeF(0.f, h)}, | |
427 {rand.nextRangeF(0.f, w), rand.nextRangeF(0.f, h)} | |
428 }; | |
429 for(int edgeType = kFillAA_GrBezierEdgeType; edgeType < 3; ++edgeTyp e) { | |
430 SkScalar x = SkScalarMul(col, w); | |
431 SkScalar y = SkScalarMul(row, h); | |
432 SkPoint controlPts[] = { | |
433 {x + baseControlPts[0].fX, y + baseControlPts[0].fY}, | |
434 {x + baseControlPts[1].fX, y + baseControlPts[1].fY}, | |
435 {x + baseControlPts[2].fX, y + baseControlPts[2].fY} | |
436 }; | |
437 SkPoint chopped[5]; | |
438 int cnt = SkChopQuadAtMaxCurvature(controlPts, chopped); | |
439 | |
440 SkPaint ctrlPtPaint; | |
441 ctrlPtPaint.setColor(rand.nextU() | 0xFF000000); | |
442 for (int i = 0; i < 3; ++i) { | |
443 canvas->drawCircle(controlPts[i].fX, controlPts[i].fY, 6.f, ctrlPtPaint); | |
444 } | |
445 | |
446 SkPaint polyPaint; | |
447 polyPaint.setColor(0xffA0A0A0); | |
448 polyPaint.setStrokeWidth(0); | |
449 polyPaint.setStyle(SkPaint::kStroke_Style); | |
450 canvas->drawPoints(SkCanvas::kPolygon_PointMode, 3, controlPts, polyPaint); | |
451 | |
452 SkPaint choppedPtPaint; | |
453 choppedPtPaint.setColor(~ctrlPtPaint.getColor() | 0xFF000000); | |
454 | |
455 for (int c = 0; c < cnt; ++c) { | |
456 SkPoint* pts = chopped + 2 * c; | |
457 | |
458 for (int i = 0; i < 3; ++i) { | |
459 canvas->drawCircle(pts[i].fX, pts[i].fY, 3.f, choppedPtP aint); | |
460 } | |
461 | |
462 SkRect bounds; | |
463 bounds.set(pts, 3); | |
464 | |
465 SkPaint boundsPaint; | |
466 boundsPaint.setColor(0xff808080); | |
467 boundsPaint.setStrokeWidth(0); | |
468 boundsPaint.setStyle(SkPaint::kStroke_Style); | |
469 canvas->drawRect(bounds, boundsPaint); | |
470 | |
471 Vertex verts[4]; | |
472 verts[0].fPosition.setRectFan(bounds.fLeft, bounds.fTop, | |
473 bounds.fRight, bounds.fBottom, | |
474 sizeof(Vertex)); | |
475 | |
476 GrPathUtils::QuadUVMatrix DevToUV(pts); | |
477 DevToUV.apply<4, sizeof(Vertex), sizeof(GrPoint)>(verts); | |
478 | |
479 GrTestTarget tt; | |
480 context->getTestTarget(&tt); | |
481 if (NULL == tt.target()) { | |
482 continue; | |
483 } | |
484 GrDrawState* drawState = tt.target()->drawState(); | |
485 drawState->setVertexAttribs<kAttribs>(2); | |
486 SkAutoTUnref<GrEffectRef> effect(GrQuadEffect::Create( | |
487 GrBezierEdgeType(edgeType), *tt.target()->caps())); | |
488 if (!effect) { | |
489 continue; | |
490 } | |
491 drawState->addCoverageEffect(effect, 1); | |
492 drawState->setRenderTarget(rt); | |
493 drawState->setColor(0xff000000); | |
494 | |
495 tt.target()->setVertexSourceToArray(verts, 4); | |
496 tt.target()->setIndexSourceToBuffer(context->getQuadIndexBuf fer()); | |
497 tt.target()->drawIndexed(kTriangles_GrPrimitiveType, 0, 0, 4 , 6); | |
498 } | |
499 ++col; | |
500 if (numCols == col) { | |
501 col = 0; | |
502 ++row; | |
503 } | |
504 } | |
505 } | |
506 } | |
507 | |
508 private: | |
509 typedef GM INHERITED; | |
510 }; | |
511 | |
512 DEF_GM( return SkNEW(BezierCubicEffects); ) | |
513 DEF_GM( return SkNEW(BezierConicEffects); ) | |
514 DEF_GM( return SkNEW(BezierQuadEffects); ) | |
176 | 515 |
177 } | 516 } |
178 | 517 |
179 #endif | 518 #endif |
OLD | NEW |