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/*
* Copyright 2013 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 "Resources.h"
#include "SkBlurImageFilter.h"
#include "SkColorFilterImageFilter.h"
#include "SkColorMatrixFilter.h"
#include "SkCanvas.h"
#include "SkGradientShader.h"
#include "SkStream.h"
#include "SkTypeface.h"
/*
* Spits out a dummy gradient to test blur with shader on paint
*/
static SkShader* MakeLinear() {
static const SkPoint kPts[] = { { 0, 0 }, { 32, 32 } };
static const SkScalar kPos[] = { 0, SK_Scalar1/2, SK_Scalar1 };
static const SkColor kColors[] = {0x80F00080, 0xF0F08000, 0x800080F0 };
return SkGradientShader::CreateLinear(kPts, kColors, kPos,
SK_ARRAY_COUNT(kColors), SkShader::kClamp_TileMode);
}
static SkImageFilter* make_grayscale(SkImageFilter* input = NULL) {
SkScalar matrix[20];
memset(matrix, 0, 20 * sizeof(SkScalar));
matrix[0] = matrix[5] = matrix[10] = 0.2126f;
matrix[1] = matrix[6] = matrix[11] = 0.7152f;
matrix[2] = matrix[7] = matrix[12] = 0.0722f;
matrix[18] = 1.0f;
SkAutoTUnref<SkColorFilter> filter(SkColorMatrixFilter::Create(matrix));
return SkColorFilterImageFilter::Create(filter, input);
}
static SkImageFilter* make_blur(float amount, SkImageFilter* input = NULL) {
return SkBlurImageFilter::Create(amount, amount, input);
}
namespace skiagm {
class ColorEmojiGM : public GM {
public:
ColorEmojiGM() : fCBDT_CBLC_Typeface(NULL), fSBIX_Typeface(NULL) { }
protected:
struct EmojiFont {
SkTypeface* typeface;
const char* text;
} emojiFonts[2];
virtual void onOnceBeforeDraw() override {
fCBDT_CBLC_Typeface.reset(GetResourceAsTypeface("/fonts/Funkster.ttf"));
emojiFonts[0].typeface = fCBDT_CBLC_Typeface;
emojiFonts[0].text = "hamburgerfons";
fSBIX_Typeface.reset(SkTypeface::CreateFromName("Apple Color Emoji", SkTypeface::kNormal));
emojiFonts[1].typeface = fSBIX_Typeface;
emojiFonts[1].text = "\xF0\x9F\x92\xB0" "\xF0\x9F\x8F\xA1" "\xF0\x9F\x8E\x85" // π°π‘π
"\xF0\x9F\x8D\xAA" "\xF0\x9F\x8D\x95" "\xF0\x9F\x9A\x80" // πͺππ
"\xF0\x9F\x9A\xBB" "\xF0\x9F\x92\xA9" "\xF0\x9F\x93\xB7" // π»π©π·
"\xF0\x9F\x93\xA6" // π¦
"\xF0\x9F\x87\xBA" "\xF0\x9F\x87\xB8" "\xF0\x9F\x87\xA6"; // πΊπΈπ¦
}
SkString onShortName() override {
return SkString("coloremoji");
}
SkISize onISize() override {
return SkISize::Make(650, 900);
}
void onDraw(SkCanvas* canvas) override {
canvas->drawColor(SK_ColorGRAY);
for (size_t i = 0; i < SK_ARRAY_COUNT(emojiFonts); ++i) {
SkPaint paint;
paint.setTypeface(emojiFonts[i].typeface);
const char* text = emojiFonts[i].text;
// draw text at different point sizes
const int textSize[] = { 10, 30, 50, };
const int textYOffset[] = { 10, 40, 100, };
SkASSERT(sizeof(textSize) == sizeof(textYOffset));
size_t y_offset = 0;
for (size_t y = 0; y < sizeof(textSize) / sizeof(int); y++) {
paint.setTextSize(SkIntToScalar(textSize[y]));
canvas->drawText(text, strlen(text), 10, SkIntToScalar(textYOffset[y]), paint);
y_offset += textYOffset[y];
}
// draw with shaders and image filters
for (int makeLinear = 0; makeLinear < 2; makeLinear++) {
for (int makeBlur = 0; makeBlur < 2; makeBlur++) {
for (int makeGray = 0; makeGray < 2; makeGray++) {
SkPaint shaderPaint;
shaderPaint.setTypeface(paint.getTypeface());
if (SkToBool(makeLinear)) {
shaderPaint.setShader(MakeLinear())->unref();
}
if (SkToBool(makeBlur) && SkToBool(makeGray)) {
SkAutoTUnref<SkImageFilter> grayScale(make_grayscale(NULL));
SkAutoTUnref<SkImageFilter> blur(make_blur(3.0f, grayScale));
shaderPaint.setImageFilter(blur);
} else if (SkToBool(makeBlur)) {
SkAutoTUnref<SkImageFilter> blur(make_blur(3.0f, NULL));
shaderPaint.setImageFilter(blur);
} else if (SkToBool(makeGray)) {
SkAutoTUnref<SkImageFilter> grayScale(make_grayscale(NULL));
shaderPaint.setImageFilter(grayScale);
}
shaderPaint.setTextSize(30);
canvas->drawText(text, strlen(text), 380, SkIntToScalar(y_offset),
shaderPaint);
y_offset += 32;
}
}
}
// setup work needed to draw text with different clips
canvas->translate(10, 160);
paint.setTextSize(40);
// compute the bounds of the text
SkRect bounds;
paint.measureText(text, strlen(text), &bounds);
const SkScalar boundsHalfWidth = bounds.width() * SK_ScalarHalf;
const SkScalar boundsHalfHeight = bounds.height() * SK_ScalarHalf;
const SkScalar boundsQuarterWidth = boundsHalfWidth * SK_ScalarHalf;
const SkScalar boundsQuarterHeight = boundsHalfHeight * SK_ScalarHalf;
SkRect upperLeftClip = SkRect::MakeXYWH(bounds.left(), bounds.top(),
boundsHalfWidth, boundsHalfHeight);
SkRect lowerRightClip = SkRect::MakeXYWH(bounds.centerX(), bounds.centerY(),
boundsHalfWidth, boundsHalfHeight);
SkRect interiorClip = bounds;
interiorClip.inset(boundsQuarterWidth, boundsQuarterHeight);
const SkRect clipRects[] = { bounds, upperLeftClip, lowerRightClip, interiorClip };
SkPaint clipHairline;
clipHairline.setColor(SK_ColorWHITE);
clipHairline.setStyle(SkPaint::kStroke_Style);
for (size_t x = 0; x < sizeof(clipRects) / sizeof(SkRect); ++x) {
canvas->save();
canvas->drawRect(clipRects[x], clipHairline);
paint.setAlpha(0x20);
canvas->drawText(text, strlen(text), 0, 0, paint);
canvas->clipRect(clipRects[x]);
paint.setAlpha(0xFF);
canvas->drawText(text, strlen(text), 0, 0, paint);
canvas->restore();
canvas->translate(0, bounds.height() + SkIntToScalar(25));
}
}
}
private:
SkAutoTUnref<SkTypeface> fCBDT_CBLC_Typeface;
SkAutoTUnref<SkTypeface> fSBIX_Typeface;
typedef GM INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
static GM* MyFactory(void*) { return new ColorEmojiGM; }
static GMRegistry reg(MyFactory);
}
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