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- /*
- * Copyright 2011 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
- #include "gm/gm.h"
- #include "include/core/SkCanvas.h"
- #include "include/core/SkColor.h"
- #include "include/core/SkFont.h"
- #include "include/core/SkFontStyle.h"
- #include "include/core/SkPaint.h"
- #include "include/core/SkPoint.h"
- #include "include/core/SkRect.h"
- #include "include/core/SkRefCnt.h"
- #include "include/core/SkScalar.h"
- #include "include/core/SkShader.h"
- #include "include/core/SkSize.h"
- #include "include/core/SkString.h"
- #include "include/core/SkTileMode.h"
- #include "include/core/SkTypeface.h"
- #include "include/core/SkTypes.h"
- #include "include/effects/SkGradientShader.h"
- static sk_sp<SkShader> make_heatGradient(const SkPoint pts[2]) {
- const SkColor bw[] = { SK_ColorBLACK, SK_ColorWHITE };
- return SkGradientShader::MakeLinear(pts, bw, nullptr, SK_ARRAY_COUNT(bw), SkTileMode::kClamp);
- }
- /**
- Test a set of clipping problems discovered while writing blitAntiRect,
- and test all the code paths through the clipping blitters.
- Each region should show as a blue center surrounded by a 2px green
- border, with no red.
- */
- #define HEIGHT 480
- class GammaTextGM : public skiagm::GM {
- protected:
- SkString onShortName() override {
- return SkString("gammatext");
- }
- SkISize onISize() override {
- return SkISize::Make(1024, HEIGHT);
- }
- static void drawGrad(SkCanvas* canvas) {
- const SkPoint pts[] = { { 0, 0 }, { 0, SkIntToScalar(HEIGHT) } };
- canvas->clear(SK_ColorRED);
- SkPaint paint;
- paint.setShader(make_heatGradient(pts));
- SkRect r = { 0, 0, SkIntToScalar(1024), SkIntToScalar(HEIGHT) };
- canvas->drawRect(r, paint);
- }
- void onDraw(SkCanvas* canvas) override {
- drawGrad(canvas);
- const SkColor fg[] = {
- 0xFFFFFFFF,
- 0xFFFFFF00, 0xFFFF00FF, 0xFF00FFFF,
- 0xFFFF0000, 0xFF00FF00, 0xFF0000FF,
- 0xFF000000,
- };
- const char* text = "Hamburgefons";
- SkPaint paint;
- SkFont font(nullptr, 16);
- font.setEdging(SkFont::Edging::kSubpixelAntiAlias);
- SkScalar x = SkIntToScalar(10);
- for (size_t i = 0; i < SK_ARRAY_COUNT(fg); ++i) {
- paint.setColor(fg[i]);
- SkScalar y = SkIntToScalar(40);
- SkScalar stopy = SkIntToScalar(HEIGHT);
- while (y < stopy) {
- canvas->drawString(text, x, y, font, paint);
- y += font.getSize() * 2;
- }
- x += SkIntToScalar(1024) / SK_ARRAY_COUNT(fg);
- }
- }
- private:
- typedef skiagm::GM INHERITED;
- };
- DEF_GM( return new GammaTextGM; )
- //////////////////////////////////////////////////////////////////////////////
- static sk_sp<SkShader> make_gradient(SkColor c) {
- const SkPoint pts[] = { { 0, 0 }, { 240, 0 } };
- SkColor colors[2];
- colors[0] = c;
- colors[1] = SkColorSetA(c, 0);
- return SkGradientShader::MakeLinear(pts, colors, nullptr, 2, SkTileMode::kClamp);
- }
- static void draw_pair(SkCanvas* canvas, const SkFont& font, SkColor color,
- const sk_sp<SkShader>& shader) {
- static const char text[] = "Now is the time for all good";
- SkPaint paint;
- paint.setColor(color);
- canvas->drawString(text, 10, 20, font, paint);
- paint.setShader(SkShaders::Color(paint.getColor()));
- canvas->drawString(text, 10, 40, font, paint);
- paint.setShader(shader);
- canvas->drawString(text, 10, 60, font, paint);
- }
- class GammaShaderTextGM : public skiagm::GM {
- sk_sp<SkShader> fShaders[3];
- SkColor fColors[3];
- public:
- GammaShaderTextGM() {
- const SkColor colors[] = { SK_ColorBLACK, SK_ColorRED, SK_ColorBLUE };
- for (size_t i = 0; i < SK_ARRAY_COUNT(fShaders); ++i) {
- fColors[i] = colors[i];
- }
- }
- protected:
- SkString onShortName() override {
- return SkString("gammagradienttext");
- }
- SkISize onISize() override {
- return SkISize::Make(300, 300);
- }
- void onOnceBeforeDraw() override {
- for (size_t i = 0; i < SK_ARRAY_COUNT(fShaders); ++i) {
- fShaders[i] = make_gradient(fColors[i]);
- }
- }
- void onDraw(SkCanvas* canvas) override {
- SkPaint paint;
- paint.setAntiAlias(true);
- SkFont font(SkTypeface::MakeFromName("serif", SkFontStyle::Italic()), 18);
- font.setEdging(SkFont::Edging::kSubpixelAntiAlias);
- for (size_t i = 0; i < SK_ARRAY_COUNT(fShaders); ++i) {
- draw_pair(canvas, font, fColors[i], fShaders[i]);
- canvas->translate(0, 80);
- }
- }
- private:
- typedef skiagm::GM INHERITED;
- };
- DEF_GM( return new GammaShaderTextGM; )
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