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- /*
- * Copyright 2017 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/SkColorFilter.h"
- #include "include/core/SkFont.h"
- #include "include/core/SkFontTypes.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"
- #include "include/effects/SkHighContrastFilter.h"
- #include "tools/ToolUtils.h"
- #include <stdio.h>
- #include <string.h>
- using InvertStyle = SkHighContrastConfig::InvertStyle;
- static SkScalar kSize = 200;
- static SkColor kColor1 = SkColorSetARGB(0xff, 0xff, 0xff, 0);
- static SkColor kColor2 = SkColorSetARGB(0xff, 0x82, 0xff, 0);
- static void draw_label(SkCanvas* canvas, const SkHighContrastConfig& config) {
- char labelBuffer[256];
- const char* invertStr =
- (config.fInvertStyle == InvertStyle::kInvertBrightness ?
- "InvBrightness" :
- (config.fInvertStyle == InvertStyle::kInvertLightness ?
- "InvLightness" : "NoInvert"));
- snprintf(labelBuffer, sizeof(labelBuffer), "%s%s contrast=%.1f",
- config.fGrayscale ? "Gray " : "",
- invertStr,
- config.fContrast);
- SkFont font;
- font.setTypeface(ToolUtils::create_portable_typeface());
- font.setSize(0.05f);
- font.setEdging(SkFont::Edging::kAlias);
- size_t len = strlen(labelBuffer);
- SkScalar width = font.measureText(labelBuffer, len, SkTextEncoding::kUTF8);
- canvas->drawSimpleText(labelBuffer, len, SkTextEncoding::kUTF8, 0.5f - width / 2, 0.16f, font, SkPaint());
- }
- static void draw_scene(SkCanvas* canvas, const SkHighContrastConfig& config) {
- SkRect bounds = SkRect::MakeLTRB(0.0f, 0.0f, 1.0f, 1.0f);
- SkPaint xferPaint;
- xferPaint.setColorFilter(SkHighContrastFilter::Make(config));
- canvas->saveLayer(&bounds, &xferPaint);
- SkPaint paint;
- bounds = SkRect::MakeLTRB(0.1f, 0.2f, 0.9f, 0.4f);
- paint.setARGB(0xff, 0x66, 0x11, 0x11);
- canvas->drawRect(bounds, paint);
- SkFont font;
- font.setSize(0.15f);
- font.setEdging(SkFont::Edging::kAlias);
- paint.setARGB(0xff, 0xbb, 0x77, 0x77);
- canvas->drawString("A", 0.15f, 0.35f, font, paint);
- bounds = SkRect::MakeLTRB(0.1f, 0.8f, 0.9f, 1.0f);
- paint.setARGB(0xff, 0xcc, 0xcc, 0xff);
- canvas->drawRect(bounds, paint);
- paint.setARGB(0xff, 0x88, 0x88, 0xbb);
- canvas->drawString("Z", 0.75f, 0.95f, font, paint);
- bounds = SkRect::MakeLTRB(0.1f, 0.4f, 0.9f, 0.6f);
- SkPoint pts[] = { { 0, 0 }, { 1, 0 } };
- SkColor colors[] = { SK_ColorWHITE, SK_ColorBLACK };
- SkScalar pos[] = { 0.2f, 0.8f };
- paint.setShader(SkGradientShader::MakeLinear(
- pts, colors, pos,
- SK_ARRAY_COUNT(colors), SkTileMode::kClamp));
- canvas->drawRect(bounds, paint);
- bounds = SkRect::MakeLTRB(0.1f, 0.6f, 0.9f, 0.8f);
- SkColor colors2[] = { SK_ColorGREEN, SK_ColorWHITE };
- paint.setShader(SkGradientShader::MakeLinear(
- pts, colors2, pos,
- SK_ARRAY_COUNT(colors2), SkTileMode::kClamp));
- canvas->drawRect(bounds, paint);
- canvas->restore();
- }
- class HighContrastFilterGM : public skiagm::GM {
- public:
- HighContrastFilterGM() {
- SkColor g1Colors[] = { kColor1, SkColorSetA(kColor1, 0x20) };
- SkColor g2Colors[] = { kColor2, SkColorSetA(kColor2, 0x20) };
- SkPoint g1Points[] = { { 0, 0 }, { 0, 100 } };
- SkPoint g2Points[] = { { 0, 0 }, { kSize, 0 } };
- SkScalar pos[] = { 0.2f, 1.0f };
- SkHighContrastConfig fConfig;
- fFilter = SkHighContrastFilter::Make(fConfig);
- fGr1 = SkGradientShader::MakeLinear(
- g1Points, g1Colors, pos, SK_ARRAY_COUNT(g1Colors),
- SkTileMode::kClamp);
- fGr2 = SkGradientShader::MakeLinear(
- g2Points, g2Colors, pos, SK_ARRAY_COUNT(g2Colors),
- SkTileMode::kClamp);
- }
- protected:
- SkString onShortName() override {
- return SkString("highcontrastfilter");
- }
- SkISize onISize() override {
- return SkISize::Make(600, 420);
- }
- void onDraw(SkCanvas* canvas) override {
- SkHighContrastConfig configs[] = {
- { false, InvertStyle::kNoInvert, 0.0f },
- { false, InvertStyle::kInvertBrightness, 0.0f },
- { false, InvertStyle::kInvertLightness, 0.0f },
- { false, InvertStyle::kInvertLightness, 0.2f },
- { true, InvertStyle::kNoInvert, 0.0f },
- { true, InvertStyle::kInvertBrightness, 0.0f },
- { true, InvertStyle::kInvertLightness, 0.0f },
- { true, InvertStyle::kInvertLightness, 0.2f },
- };
- for (size_t i = 0; i < SK_ARRAY_COUNT(configs); ++i) {
- SkScalar x = kSize * (i % 4);
- SkScalar y = kSize * (i / 4);
- canvas->save();
- canvas->translate(x, y);
- canvas->scale(kSize, kSize);
- draw_scene(canvas, configs[i]);
- draw_label(canvas, configs[i]);
- canvas->restore();
- }
- }
- private:
- sk_sp<SkColorFilter> fFilter;
- sk_sp<SkShader> fGr1, fGr2;
- typedef skiagm::GM INHERITED;
- };
- DEF_GM(return new HighContrastFilterGM;)
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