298 lines
10 KiB
C++
298 lines
10 KiB
C++
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/*
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* Copyright 2014 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "gm.h"
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#if SK_SUPPORT_GPU
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#include "GrFragmentProcessor.h"
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#include "GrCoordTransform.h"
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#include "effects/GrXfermodeFragmentProcessor.h"
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#include "gl/GrGLProcessor.h"
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#include "gl/builders/GrGLProgramBuilder.h"
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#include "Resources.h"
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#include "SkReadBuffer.h"
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#include "SkShader.h"
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#include "SkStream.h"
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#include "SkTypeface.h"
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#include "SkWriteBuffer.h"
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namespace skiagm {
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///////////////////////////////////////////////////////////////////////////////
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class DCShader : public SkShader {
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public:
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DCShader(const SkMatrix& matrix) : fDeviceMatrix(matrix) {}
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SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(DCShader);
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void flatten(SkWriteBuffer& buf) const override {
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buf.writeMatrix(fDeviceMatrix);
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}
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const GrFragmentProcessor* asFragmentProcessor(GrContext*,
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const SkMatrix& viewM,
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const SkMatrix* localMatrix,
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SkFilterQuality) const override;
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#ifndef SK_IGNORE_TO_STRING
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void toString(SkString* str) const override {
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str->appendf("DCShader: ()");
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}
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#endif
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private:
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const SkMatrix fDeviceMatrix;
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};
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SkFlattenable* DCShader::CreateProc(SkReadBuffer& buf) {
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SkMatrix matrix;
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buf.readMatrix(&matrix);
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return new DCShader(matrix);
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}
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class DCFP : public GrFragmentProcessor {
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public:
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DCFP(const SkMatrix& m) : fDeviceTransform(kDevice_GrCoordSet, m) {
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this->addCoordTransform(&fDeviceTransform);
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this->initClassID<DCFP>();
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}
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GrGLFragmentProcessor* onCreateGLInstance() const override {
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class DCGLFP : public GrGLFragmentProcessor {
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void emitCode(EmitArgs& args) override {
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GrGLFragmentBuilder* fpb = args.fBuilder->getFragmentShaderBuilder();
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fpb->codeAppendf("vec2 c = %s;", fpb->ensureFSCoords2D(args.fCoords, 0).c_str());
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fpb->codeAppend("vec2 r = mod(c, vec2(20.0));");
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fpb->codeAppend("vec4 color = vec4(0.5*sin(c.x / 15.0) + 0.5,"
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"0.5*cos((c.x + c.y) / 15.0) + 0.5,"
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"(r.x + r.y) / 20.0,"
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"distance(r, vec2(15.0)) / 20.0 + 0.2);");
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fpb->codeAppendf("color.rgb *= color.a;"
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"%s = color * %s;",
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args.fOutputColor, GrGLSLExpr4(args.fInputColor).c_str());
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}
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void onSetData(const GrGLProgramDataManager&, const GrProcessor&) override {}
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};
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return new DCGLFP;
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}
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const char* name() const override { return "DCFP"; }
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void onComputeInvariantOutput(GrInvariantOutput* inout) const override {
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inout->mulByUnknownFourComponents();
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}
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private:
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void onGetGLProcessorKey(const GrGLSLCaps& caps,
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GrProcessorKeyBuilder* b) const override {}
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bool onIsEqual(const GrFragmentProcessor&) const override { return true; }
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GrCoordTransform fDeviceTransform;
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};
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const GrFragmentProcessor* DCShader::asFragmentProcessor(GrContext*,
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const SkMatrix& viewM,
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const SkMatrix* localMatrix,
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SkFilterQuality) const {
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SkAutoTUnref<const GrFragmentProcessor> inner(new DCFP(fDeviceMatrix));
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return GrFragmentProcessor::MulOutputByInputAlpha(inner);
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}
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class DCShaderGM : public GM {
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public:
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DCShaderGM() {
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this->setBGColor(sk_tool_utils::color_to_565(0xFFAABBCC));
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}
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~DCShaderGM() override {
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for (int i = 0; i < fPrims.count(); ++i) {
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delete fPrims[i];
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}
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}
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protected:
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SkString onShortName() override {
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return SkString("dcshader");
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}
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SkISize onISize() override { return SkISize::Make(1000, 900); }
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void onOnceBeforeDraw() override {
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struct Rect : public Prim {
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SkRect draw(SkCanvas* canvas, const SkPaint& paint) override {
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SkRect rect = SkRect::MakeXYWH(0, 0, 50, 50);
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canvas->drawRect(rect, paint);
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return rect;
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}
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};
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struct Circle : public Prim {
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SkRect draw(SkCanvas* canvas, const SkPaint& paint) override {
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static const SkScalar radius = 25;
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canvas->drawCircle(radius, radius, radius, paint);
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return SkRect::MakeXYWH(0, 0, 2 * radius, 2 * radius);
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}
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};
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struct RRect : public Prim {
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SkRect draw(SkCanvas* canvas, const SkPaint& paint) override {
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SkRRect rrect;
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rrect.setRectXY(SkRect::MakeXYWH(0, 0, 50, 50), 10, 10);
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canvas->drawRRect(rrect, paint);
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return rrect.getBounds();
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}
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};
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struct DRRect : public Prim {
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SkRect draw(SkCanvas* canvas, const SkPaint& paint) override {
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SkRRect outerRRect;
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outerRRect.setRectXY(SkRect::MakeXYWH(0, 0, 50, 50), 5, 5);
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SkRRect innerRRect;
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innerRRect.setRectXY(SkRect::MakeXYWH(5, 8, 35, 30), 8, 3);
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canvas->drawDRRect(outerRRect, innerRRect, paint);
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return outerRRect.getBounds();
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}
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};
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struct Path : public Prim {
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SkRect draw(SkCanvas* canvas, const SkPaint& paint) override {
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SkPath path;
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path.addCircle(15, 15, 10);
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path.addOval(SkRect::MakeXYWH(2, 2, 22, 37));
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path.setFillType(SkPath::kEvenOdd_FillType);
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canvas->drawPath(path, paint);
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return path.getBounds();
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}
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};
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struct Points : public Prim {
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Points(SkCanvas::PointMode mode) : fMode(mode) {}
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SkRect draw(SkCanvas* canvas, const SkPaint& paint) override {
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SkRandom random;
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SkPoint points[500];
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SkRect bounds = SkRect::MakeWH(50, 50);
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int count = SkToInt(SK_ARRAY_COUNT(points));
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if (SkCanvas::kPoints_PointMode != fMode) {
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count = SkTMin(count, 10);
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}
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for (int p = 0; p < count; ++p) {
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points[p].fX = random.nextUScalar1() * bounds.width();
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points[p].fY = random.nextUScalar1() * bounds.width();
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}
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canvas->drawPoints(fMode, count, points, paint);
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return bounds;
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}
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SkCanvas::PointMode fMode;
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};
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struct Text : public Prim {
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SkRect draw(SkCanvas* canvas, const SkPaint& origPaint) override {
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SkPaint paint = origPaint;
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paint.setTextSize(30.f);
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this->setFont(&paint);
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const char* text = this->text();
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static const SkVector offset = SkVector::Make(10, 10);
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canvas->drawText(text, strlen(text), offset.fX, offset.fY, paint);
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SkRect bounds;
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paint.measureText(text, strlen(text), &bounds);
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bounds.offset(offset);
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return bounds;
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}
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virtual void setFont(SkPaint* paint) {
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sk_tool_utils::set_portable_typeface(paint);
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}
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virtual const char* text() const { return "Hello, Skia!"; }
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};
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fPrims.push_back(new Rect);
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fPrims.push_back(new Circle);
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fPrims.push_back(new RRect);
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fPrims.push_back(new DRRect);
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fPrims.push_back(new Path);
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fPrims.push_back(new Points(SkCanvas::kPoints_PointMode));
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fPrims.push_back(new Points(SkCanvas::kLines_PointMode));
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fPrims.push_back(new Points(SkCanvas::kPolygon_PointMode));
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fPrims.push_back(new Text);
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}
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void onDraw(SkCanvas* canvas) override {
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// This GM exists to test a specific feature of the GPU backend. It does not work with the
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// sw rasterizer, tile modes, etc.
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if (nullptr == canvas->getGrContext()) {
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skiagm::GM::DrawGpuOnlyMessage(canvas);
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return;
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}
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SkPaint paint;
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SkTArray<SkMatrix> devMats;
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devMats.push_back().reset();
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devMats.push_back().setRotate(45, 500, 500);
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devMats.push_back().setRotate(-30, 200, 200);
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devMats.back().setPerspX(-SK_Scalar1 / 2000);
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devMats.back().setPerspY(SK_Scalar1 / 1000);
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SkTArray<SkMatrix> viewMats;
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viewMats.push_back().setScale(0.75f, 0.75f);
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viewMats.push_back().setRotate(45, 50, 50);
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viewMats.back().postScale(0.5f, 1.1f);
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canvas->translate(10, 20);
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canvas->save();
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SkScalar tx = 0, maxTy = 0;
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static const SkScalar kW = 900;
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for (int aa = 0; aa < 2; ++aa) {
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for (int i = 0; i < fPrims.count(); ++i) {
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for (int j = 0; j < devMats.count(); ++j) {
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for (int k = 0; k < viewMats.count(); ++k) {
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paint.setShader(new DCShader(devMats[j]))->unref();
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paint.setAntiAlias(SkToBool(aa));
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canvas->save();
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canvas->concat(viewMats[k]);
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SkRect bounds = fPrims[i]->draw(canvas, paint);
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canvas->restore();
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viewMats[k].mapRect(&bounds);
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// add margins
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bounds.fRight += 20;
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bounds.fBottom += 20;
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canvas->translate(bounds.fRight, 0);
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tx += bounds.fRight;
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maxTy = SkTMax(bounds.fBottom, maxTy);
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if (tx > kW) {
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tx = 0;
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canvas->restore();
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canvas->translate(0, maxTy);
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canvas->save();
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maxTy = 0;
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}
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}
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}
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}
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}
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canvas->restore();
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}
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private:
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struct Prim {
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virtual ~Prim() {}
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virtual SkRect draw(SkCanvas*, const SkPaint&) = 0;
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};
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SkTArray<Prim*> fPrims;
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typedef GM INHERITED;
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};
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DEF_GM(return new DCShaderGM;)
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}
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#endif
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