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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.h"
#include "SkCanvas.h"
#include "SkPath.h"
#include "SkGradientShader.h"
#include "SkTypeface.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),
SkShader::kClamp_TileMode);
}
static bool setFont(SkPaint* paint, const char name[]) {
paint->setTypeface(SkTypeface::MakeFromName(name, SkFontStyle()));
return SkToBool(paint->getTypeface());
}
/**
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 {
SkString name("gammatext");
name.append(sk_tool_utils::major_platform_os_name());
return name;
}
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";
size_t len = strlen(text);
SkPaint paint;
setFont(&paint, sk_tool_utils::platform_font_name("serif"));
paint.setTextSize(SkIntToScalar(16));
paint.setAntiAlias(true);
paint.setLCDRenderText(true);
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->drawText(text, len, x, y, paint);
y += paint.getTextSize() * 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, SkShader::kClamp_TileMode);
}
static void set_face(SkPaint* paint) {
paint->setTypeface(SkTypeface::MakeFromName("serif",
SkFontStyle::FromOldStyle(SkTypeface::kItalic)));
}
static void draw_pair(SkCanvas* canvas, SkPaint* paint, const sk_sp<SkShader>& shader) {
const char text[] = "Now is the time for all good";
const size_t len = strlen(text);
paint->setShader(nullptr);
canvas->drawText(text, len, 10, 20, *paint);
paint->setShader(SkShader::MakeColorShader(paint->getColor()));
canvas->drawText(text, len, 10, 40, *paint);
paint->setShader(shader);
canvas->drawText(text, len, 10, 60, *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);
paint.setLCDRenderText(true);
paint.setTextSize(18);
set_face(&paint);
for (size_t i = 0; i < SK_ARRAY_COUNT(fShaders); ++i) {
paint.setColor(fColors[i]);
draw_pair(canvas, &paint, fShaders[i]);
canvas->translate(0, 80);
}
}
private:
typedef skiagm::GM INHERITED;
};
DEF_GM( return new GammaShaderTextGM; )
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