230 lines
7.8 KiB
C++
230 lines
7.8 KiB
C++
/*
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* Copyright 2013 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/gm.h"
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#include "include/core/SkBitmap.h"
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#include "include/core/SkBlendMode.h"
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#include "include/core/SkCanvas.h"
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#include "include/core/SkColor.h"
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#include "include/core/SkColorPriv.h"
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#include "include/core/SkColorSpace.h"
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#include "include/core/SkFont.h"
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#include "include/core/SkImageInfo.h"
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#include "include/core/SkMatrix.h"
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#include "include/core/SkPaint.h"
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#include "include/core/SkPoint.h"
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#include "include/core/SkRect.h"
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#include "include/core/SkRefCnt.h"
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#include "include/core/SkScalar.h"
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#include "include/core/SkShader.h"
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#include "include/core/SkSize.h"
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#include "include/core/SkString.h"
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#include "include/core/SkSurface.h"
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#include "include/core/SkTileMode.h"
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#include "include/core/SkTypeface.h"
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#include "include/core/SkTypes.h"
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#include "include/effects/SkGradientShader.h"
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#include "tools/ToolUtils.h"
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#include <string.h>
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namespace skiagm {
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/**
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* This tests drawing device-covering rects with solid colors and bitmap shaders over a
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* checkerboard background using different xfermodes.
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*/
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class Xfermodes3GM : public GM {
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public:
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Xfermodes3GM() { this->setBGColor(ToolUtils::color_to_565(0xFF70D0E0)); }
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protected:
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SkString onShortName() override {
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return SkString("xfermodes3");
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}
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SkISize onISize() override {
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return SkISize::Make(630, 1215);
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}
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void onDraw(SkCanvas* canvas) override {
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canvas->translate(SkIntToScalar(10), SkIntToScalar(20));
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SkFont font(ToolUtils::create_portable_typeface());
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SkPaint labelP;
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constexpr SkColor kSolidColors[] = {
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SK_ColorTRANSPARENT,
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SK_ColorBLUE,
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0x80808000
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};
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constexpr SkColor kBmpAlphas[] = {
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0xff,
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0x80,
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};
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auto tempSurface(this->makeTempSurface(canvas, kSize, kSize));
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int test = 0;
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int x = 0, y = 0;
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constexpr struct { SkPaint::Style fStyle; SkScalar fWidth; } kStrokes[] = {
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{SkPaint::kFill_Style, 0},
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{SkPaint::kStroke_Style, SkIntToScalar(kSize) / 2},
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};
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for (size_t s = 0; s < SK_ARRAY_COUNT(kStrokes); ++s) {
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for (size_t m = 0; m <= (size_t)SkBlendMode::kLastMode; ++m) {
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SkBlendMode mode = static_cast<SkBlendMode>(m);
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canvas->drawString(SkBlendMode_Name(mode),
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SkIntToScalar(x),
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SkIntToScalar(y + kSize + 3) + font.getSize(),
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font, labelP);
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for (size_t c = 0; c < SK_ARRAY_COUNT(kSolidColors); ++c) {
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SkPaint modePaint;
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modePaint.setBlendMode(mode);
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modePaint.setColor(kSolidColors[c]);
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modePaint.setStyle(kStrokes[s].fStyle);
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modePaint.setStrokeWidth(kStrokes[s].fWidth);
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this->drawMode(canvas, x, y, kSize, kSize, modePaint, tempSurface.get());
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++test;
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x += kSize + 10;
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if (!(test % kTestsPerRow)) {
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x = 0;
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y += kSize + 30;
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}
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}
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for (size_t a = 0; a < SK_ARRAY_COUNT(kBmpAlphas); ++a) {
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SkPaint modePaint;
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modePaint.setBlendMode(mode);
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modePaint.setAlpha(kBmpAlphas[a]);
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modePaint.setShader(fBmpShader);
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modePaint.setStyle(kStrokes[s].fStyle);
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modePaint.setStrokeWidth(kStrokes[s].fWidth);
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this->drawMode(canvas, x, y, kSize, kSize, modePaint, tempSurface.get());
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++test;
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x += kSize + 10;
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if (!(test % kTestsPerRow)) {
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x = 0;
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y += kSize + 30;
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}
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}
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}
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}
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}
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private:
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/**
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* GrContext has optimizations around full rendertarget draws that can be replaced with clears.
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* We are trying to test those. We could use saveLayer() to create small SkGpuDevices but
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* saveLayer() uses the texture cache. This means that the actual render target may be larger
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* than the layer. Because the clip will contain the layer's bounds, no draws will be full-RT.
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* So explicitly create a temporary canvas with dimensions exactly the layer size.
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*/
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sk_sp<SkSurface> makeTempSurface(SkCanvas* baseCanvas, int w, int h) {
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SkImageInfo baseInfo = baseCanvas->imageInfo();
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SkImageInfo info = SkImageInfo::Make(w, h, baseInfo.colorType(), baseInfo.alphaType(),
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baseInfo.refColorSpace());
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return baseCanvas->makeSurface(info);
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}
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void drawMode(SkCanvas* canvas,
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int x, int y, int w, int h,
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const SkPaint& modePaint, SkSurface* surface) {
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canvas->save();
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canvas->translate(SkIntToScalar(x), SkIntToScalar(y));
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SkRect r = SkRect::MakeWH(SkIntToScalar(w), SkIntToScalar(h));
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SkCanvas* modeCanvas;
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if (nullptr == surface) {
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canvas->saveLayer(&r, nullptr);
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canvas->clipRect(r);
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modeCanvas = canvas;
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} else {
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modeCanvas = surface->getCanvas();
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}
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SkPaint bgPaint;
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bgPaint.setAntiAlias(false);
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bgPaint.setShader(fBGShader);
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modeCanvas->drawRect(r, bgPaint);
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modeCanvas->drawRect(r, modePaint);
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modeCanvas = nullptr;
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if (nullptr == surface) {
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canvas->restore();
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} else {
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surface->draw(canvas, 0, 0);
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}
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r.inset(-SK_ScalarHalf, -SK_ScalarHalf);
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SkPaint borderPaint;
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borderPaint.setStyle(SkPaint::kStroke_Style);
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canvas->drawRect(r, borderPaint);
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canvas->restore();
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}
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void onOnceBeforeDraw() override {
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const uint32_t kCheckData[] = {
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SkPackARGB32(0xFF, 0x42, 0x41, 0x42),
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SkPackARGB32(0xFF, 0xD6, 0xD3, 0xD6),
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SkPackARGB32(0xFF, 0xD6, 0xD3, 0xD6),
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SkPackARGB32(0xFF, 0x42, 0x41, 0x42)
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};
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SkBitmap bg;
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bg.allocN32Pixels(2, 2, true);
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memcpy(bg.getPixels(), kCheckData, sizeof(kCheckData));
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SkMatrix lm;
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lm.setScale(SkIntToScalar(kCheckSize), SkIntToScalar(kCheckSize));
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fBGShader = bg.makeShader(SkTileMode::kRepeat, SkTileMode::kRepeat,
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SkSamplingOptions(), lm);
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SkPaint bmpPaint;
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const SkPoint kCenter = { SkIntToScalar(kSize) / 2, SkIntToScalar(kSize) / 2 };
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const SkColor kColors[] = {
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SK_ColorTRANSPARENT, 0x80800000, 0xF020F060, SK_ColorWHITE
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};
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bmpPaint.setShader(SkGradientShader::MakeRadial(kCenter, 3 * SkIntToScalar(kSize) / 4,
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kColors, nullptr, SK_ARRAY_COUNT(kColors),
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SkTileMode::kRepeat));
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SkBitmap bmp;
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bmp.allocN32Pixels(kSize, kSize);
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SkCanvas bmpCanvas(bmp);
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bmpCanvas.clear(SK_ColorTRANSPARENT);
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SkRect rect = { SkIntToScalar(kSize) / 8, SkIntToScalar(kSize) / 8,
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7 * SkIntToScalar(kSize) / 8, 7 * SkIntToScalar(kSize) / 8};
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bmpCanvas.drawRect(rect, bmpPaint);
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fBmpShader = bmp.makeShader(SkSamplingOptions());
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}
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enum {
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kCheckSize = 8,
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kSize = 30,
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kTestsPerRow = 15,
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};
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sk_sp<SkShader> fBGShader;
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sk_sp<SkShader> fBmpShader;
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using INHERITED = GM;
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};
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//////////////////////////////////////////////////////////////////////////////
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DEF_GM(return new Xfermodes3GM;)
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} // namespace skiagm
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