bsalomon | b0ae649 | 2014-12-29 07:05:27 -0800 | [diff] [blame^] | 1 | |
| 2 | /* |
| 3 | * Copyright 2014 Google Inc. |
| 4 | * |
| 5 | * Use of this source code is governed by a BSD-style license that can be |
| 6 | * found in the LICENSE file. |
| 7 | */ |
| 8 | |
| 9 | #include "gm.h" |
| 10 | #if SK_SUPPORT_GPU |
| 11 | #include "GrFragmentProcessor.h" |
| 12 | #include "GrCoordTransform.h" |
| 13 | #include "gl/GrGLProcessor.h" |
| 14 | #include "gl/builders/GrGLProgramBuilder.h" |
| 15 | #include "Resources.h" |
| 16 | #include "SkShader.h" |
| 17 | #include "SkStream.h" |
| 18 | #include "SkTypeface.h" |
| 19 | |
| 20 | namespace skiagm { |
| 21 | |
| 22 | /////////////////////////////////////////////////////////////////////////////// |
| 23 | |
| 24 | class DCShader : public SkShader { |
| 25 | public: |
| 26 | DCShader(const SkMatrix& matrix) : fDeviceMatrix(matrix) {} |
| 27 | |
| 28 | Factory getFactory() const SK_OVERRIDE { return NULL; } |
| 29 | |
| 30 | bool asFragmentProcessor(GrContext*, const SkPaint& paint, const SkMatrix& viewM, |
| 31 | const SkMatrix* localMatrix, GrColor* color, |
| 32 | GrFragmentProcessor** fp) const SK_OVERRIDE; |
| 33 | private: |
| 34 | const SkMatrix fDeviceMatrix; |
| 35 | }; |
| 36 | |
| 37 | class DCFP : public GrFragmentProcessor { |
| 38 | public: |
| 39 | DCFP(const SkMatrix& m) : fDeviceTransform(kDevice_GrCoordSet, m) { |
| 40 | this->addCoordTransform(&fDeviceTransform); |
| 41 | this->initClassID<DCFP>(); |
| 42 | } |
| 43 | |
| 44 | void getGLProcessorKey(const GrGLCaps& caps, |
| 45 | GrProcessorKeyBuilder* b) const SK_OVERRIDE {} |
| 46 | |
| 47 | GrGLFragmentProcessor* createGLInstance() const SK_OVERRIDE { |
| 48 | class DCGLFP : public GrGLFragmentProcessor { |
| 49 | void emitCode(GrGLFPBuilder* builder, |
| 50 | const GrFragmentProcessor& fp, |
| 51 | const char* outputColor, |
| 52 | const char* inputColor, |
| 53 | const TransformedCoordsArray& coords, |
| 54 | const TextureSamplerArray& samplers) { |
| 55 | GrGLFPFragmentBuilder* fpb = builder->getFragmentShaderBuilder(); |
| 56 | fpb->codeAppendf("vec2 c = %s;", fpb->ensureFSCoords2D(coords, 0).c_str()); |
| 57 | fpb->codeAppend("vec2 r = mod(c, vec2(20.0));"); |
| 58 | fpb->codeAppend("vec4 color = vec4(0.5*sin(c.x / 15.0) + 0.5," |
| 59 | "0.5*cos((c.x + c.y) / 15.0) + 0.5," |
| 60 | "(r.x + r.y) / 20.0," |
| 61 | "distance(r, vec2(15.0)) / 20.0 + 0.2);"); |
| 62 | fpb->codeAppendf("color.rgb *= color.a;" |
| 63 | "%s = color * %s;", |
| 64 | outputColor, GrGLSLExpr4(inputColor).c_str()); |
| 65 | } |
| 66 | void setData(const GrGLProgramDataManager&, const GrProcessor&) SK_OVERRIDE {} |
| 67 | }; |
| 68 | return SkNEW(DCGLFP); |
| 69 | } |
| 70 | |
| 71 | const char* name() const SK_OVERRIDE { return "DCFP"; } |
| 72 | |
| 73 | void onComputeInvariantOutput(GrInvariantOutput* inout) const SK_OVERRIDE { |
| 74 | inout->mulByUnknownFourComponents(); |
| 75 | } |
| 76 | |
| 77 | private: |
| 78 | bool onIsEqual(const GrFragmentProcessor&) const SK_OVERRIDE { return true; } |
| 79 | |
| 80 | GrCoordTransform fDeviceTransform; |
| 81 | }; |
| 82 | |
| 83 | bool DCShader::asFragmentProcessor(GrContext*, const SkPaint& paint, const SkMatrix& viewM, |
| 84 | const SkMatrix* localMatrix, GrColor* color, |
| 85 | GrFragmentProcessor** fp) const { |
| 86 | *fp = SkNEW_ARGS(DCFP, (fDeviceMatrix)); |
| 87 | *color = GrColorPackA4(paint.getAlpha()); |
| 88 | return true; |
| 89 | } |
| 90 | |
| 91 | class DCShaderGM : public GM { |
| 92 | public: |
| 93 | DCShaderGM() { |
| 94 | this->setBGColor(0xFFAABBCC); |
| 95 | } |
| 96 | |
| 97 | ~DCShaderGM() SK_OVERRIDE { |
| 98 | for (int i = 0; i < fPrims.count(); ++i) { |
| 99 | SkDELETE(fPrims[i]); |
| 100 | } |
| 101 | } |
| 102 | |
| 103 | protected: |
| 104 | uint32_t onGetFlags() const SK_OVERRIDE { |
| 105 | return kGPUOnly_Flag; |
| 106 | } |
| 107 | |
| 108 | SkString onShortName() SK_OVERRIDE { |
| 109 | return SkString("dcshader"); |
| 110 | } |
| 111 | |
| 112 | SkISize onISize() SK_OVERRIDE { return SkISize::Make(1000, 900); } |
| 113 | |
| 114 | void onOnceBeforeDraw() SK_OVERRIDE { |
| 115 | struct Rect : public Prim { |
| 116 | SkRect draw(SkCanvas* canvas, const SkPaint& paint) SK_OVERRIDE { |
| 117 | SkRect rect = SkRect::MakeXYWH(0, 0, 50, 50); |
| 118 | canvas->drawRect(rect, paint); |
| 119 | return rect; |
| 120 | } |
| 121 | }; |
| 122 | |
| 123 | struct Circle : public Prim { |
| 124 | SkRect draw(SkCanvas* canvas, const SkPaint& paint) SK_OVERRIDE { |
| 125 | static const SkScalar radius = 25; |
| 126 | canvas->drawCircle(radius, radius, radius, paint); |
| 127 | return SkRect::MakeXYWH(0, 0, 2 * radius, 2 * radius); |
| 128 | } |
| 129 | }; |
| 130 | |
| 131 | struct RRect : public Prim { |
| 132 | SkRect draw(SkCanvas* canvas, const SkPaint& paint) SK_OVERRIDE { |
| 133 | SkRRect rrect; |
| 134 | rrect.setRectXY(SkRect::MakeXYWH(0, 0, 50, 50), 10, 10); |
| 135 | canvas->drawRRect(rrect, paint); |
| 136 | return rrect.getBounds(); |
| 137 | } |
| 138 | }; |
| 139 | |
| 140 | struct DRRect : public Prim { |
| 141 | SkRect draw(SkCanvas* canvas, const SkPaint& paint) SK_OVERRIDE { |
| 142 | SkRRect outerRRect; |
| 143 | outerRRect.setRectXY(SkRect::MakeXYWH(0, 0, 50, 50), 5, 5); |
| 144 | SkRRect innerRRect; |
| 145 | innerRRect.setRectXY(SkRect::MakeXYWH(5, 8, 35, 30), 8, 3); |
| 146 | canvas->drawDRRect(outerRRect, innerRRect, paint); |
| 147 | return outerRRect.getBounds(); |
| 148 | } |
| 149 | }; |
| 150 | struct Path : public Prim { |
| 151 | SkRect draw(SkCanvas* canvas, const SkPaint& paint) SK_OVERRIDE { |
| 152 | SkPath path; |
| 153 | path.addCircle(15, 15, 10); |
| 154 | path.addOval(SkRect::MakeXYWH(2, 2, 22, 37)); |
| 155 | path.setFillType(SkPath::kEvenOdd_FillType); |
| 156 | canvas->drawPath(path, paint); |
| 157 | return path.getBounds(); |
| 158 | } |
| 159 | }; |
| 160 | |
| 161 | struct Points : public Prim { |
| 162 | Points(SkCanvas::PointMode mode) : fMode(mode) {} |
| 163 | |
| 164 | SkRect draw(SkCanvas* canvas, const SkPaint& paint) SK_OVERRIDE { |
| 165 | SkRandom random; |
| 166 | SkPoint points[500]; |
| 167 | SkRect bounds = SkRect::MakeWH(50, 50); |
| 168 | int count = SkToInt(SK_ARRAY_COUNT(points)); |
| 169 | if (SkCanvas::kPoints_PointMode != fMode) { |
| 170 | count = SkTMin(count, 10); |
| 171 | } |
| 172 | for (int p = 0; p < count; ++p) { |
| 173 | points[p].fX = random.nextUScalar1() * bounds.width(); |
| 174 | points[p].fY = random.nextUScalar1() * bounds.width(); |
| 175 | } |
| 176 | canvas->drawPoints(fMode, count, points, paint); |
| 177 | return bounds; |
| 178 | } |
| 179 | SkCanvas::PointMode fMode; |
| 180 | }; |
| 181 | |
| 182 | struct Text : public Prim { |
| 183 | SkRect draw(SkCanvas* canvas, const SkPaint& origPaint) SK_OVERRIDE { |
| 184 | SkPaint paint = origPaint; |
| 185 | paint.setTextSize(30.f); |
| 186 | this->setFont(&paint); |
| 187 | const char* text = this->text(); |
| 188 | static const SkVector offset = SkVector::Make(10, 10); |
| 189 | canvas->drawText(text, strlen(text), offset.fX, offset.fY, paint); |
| 190 | SkRect bounds; |
| 191 | paint.measureText(text, strlen(text), &bounds); |
| 192 | bounds.offset(offset); |
| 193 | return bounds; |
| 194 | } |
| 195 | |
| 196 | virtual void setFont(SkPaint* paint) { |
| 197 | sk_tool_utils::set_portable_typeface(paint); |
| 198 | } |
| 199 | |
| 200 | virtual const char* text() const { return "Hello, Skia!"; } |
| 201 | }; |
| 202 | |
| 203 | struct BmpText : public Text { |
| 204 | void setFont(SkPaint* paint) SK_OVERRIDE { |
| 205 | if (!fTypeface) { |
| 206 | SkString filename = GetResourcePath("/Funkster.ttf"); |
| 207 | SkAutoTUnref<SkFILEStream> stream(new SkFILEStream(filename.c_str())); |
| 208 | if (!stream->isValid()) { |
| 209 | SkDebugf("Could not find Funkster.ttf, please set --resourcePath " |
| 210 | "correctly.\n"); |
| 211 | return; |
| 212 | } |
| 213 | fTypeface.reset(SkTypeface::CreateFromStream(stream)); |
| 214 | } |
| 215 | paint->setTypeface(fTypeface); |
| 216 | } |
| 217 | |
| 218 | const char* text() const SK_OVERRIDE { return "Hi, Skia!"; } |
| 219 | |
| 220 | SkAutoTUnref<SkTypeface> fTypeface; |
| 221 | }; |
| 222 | fPrims.push_back(SkNEW(Rect)); |
| 223 | fPrims.push_back(SkNEW(Circle)); |
| 224 | fPrims.push_back(SkNEW(RRect)); |
| 225 | fPrims.push_back(SkNEW(DRRect)); |
| 226 | fPrims.push_back(SkNEW(Path)); |
| 227 | fPrims.push_back(SkNEW(Points(SkCanvas::kPoints_PointMode))); |
| 228 | fPrims.push_back(SkNEW(Points(SkCanvas::kLines_PointMode))); |
| 229 | fPrims.push_back(SkNEW(Points(SkCanvas::kPolygon_PointMode))); |
| 230 | fPrims.push_back(SkNEW(Text)); |
| 231 | fPrims.push_back(SkNEW(BmpText)); |
| 232 | } |
| 233 | |
| 234 | void onDraw(SkCanvas* canvas) SK_OVERRIDE { |
| 235 | SkPaint paint; |
| 236 | SkTArray<SkMatrix> devMats; |
| 237 | devMats.push_back().reset(); |
| 238 | devMats.push_back().setRotate(45, 500, 500); |
| 239 | devMats.push_back().setRotate(-30, 200, 200); |
| 240 | devMats.back().setPerspX(-SkScalarToPersp(SK_Scalar1 / 2000)); |
| 241 | devMats.back().setPerspY(SkScalarToPersp(SK_Scalar1 / 1000)); |
| 242 | |
| 243 | |
| 244 | SkTArray<SkMatrix> viewMats; |
| 245 | viewMats.push_back().setScale(0.75f, 0.75f); |
| 246 | viewMats.push_back().setRotate(45, 50, 50); |
| 247 | viewMats.back().postScale(0.5f, 1.1f); |
| 248 | |
| 249 | canvas->translate(10, 20); |
| 250 | canvas->save(); |
| 251 | SkScalar tx = 0, maxTy = 0; |
| 252 | static const SkScalar kW = 900; |
| 253 | |
| 254 | for (int aa = 0; aa < 2; ++aa) { |
| 255 | for (int i = 0; i < fPrims.count(); ++i) { |
| 256 | for (int j = 0; j < devMats.count(); ++j) { |
| 257 | for (int k = 0; k < viewMats.count(); ++k) { |
| 258 | paint.setShader(SkNEW_ARGS(DCShader, (devMats[j])))->unref(); |
| 259 | paint.setAntiAlias(SkToBool(aa)); |
| 260 | canvas->save(); |
| 261 | canvas->concat(viewMats[k]); |
| 262 | SkRect bounds = fPrims[i]->draw(canvas, paint); |
| 263 | canvas->restore(); |
| 264 | viewMats[k].mapRect(&bounds); |
| 265 | // add margins |
| 266 | bounds.fRight += 20; |
| 267 | bounds.fBottom += 20; |
| 268 | canvas->translate(bounds.fRight, 0); |
| 269 | tx += bounds.fRight; |
| 270 | maxTy = SkTMax(bounds.fBottom, maxTy); |
| 271 | if (tx > kW) { |
| 272 | tx = 0; |
| 273 | canvas->restore(); |
| 274 | canvas->translate(0, maxTy); |
| 275 | canvas->save(); |
| 276 | maxTy = 0; |
| 277 | } |
| 278 | } |
| 279 | } |
| 280 | } |
| 281 | } |
| 282 | canvas->restore(); |
| 283 | } |
| 284 | |
| 285 | private: |
| 286 | struct Prim { |
| 287 | virtual ~Prim() {} |
| 288 | virtual SkRect draw(SkCanvas*, const SkPaint&) = 0; |
| 289 | }; |
| 290 | |
| 291 | SkTArray<Prim*> fPrims; |
| 292 | |
| 293 | typedef GM INHERITED; |
| 294 | }; |
| 295 | |
| 296 | DEF_GM( return SkNEW(DCShaderGM); ) |
| 297 | } |
| 298 | #endif |