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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 "SkCanvas.h"
#include "SkColorFilter.h"
#include "SkGradientShader.h"
#include "SkRandom.h"
static sk_sp<SkShader> make_shader1(SkScalar w, SkScalar h) {
const SkColor colors[] = {
SK_ColorRED, SK_ColorCYAN, SK_ColorGREEN, SK_ColorWHITE,
SK_ColorMAGENTA, SK_ColorBLUE, SK_ColorYELLOW,
};
const SkPoint pts[] = { { w/4, 0 }, { 3*w/4, h } };
return SkGradientShader::MakeLinear(pts, colors, nullptr, SK_ARRAY_COUNT(colors),
SkShader::kMirror_TileMode);
}
static sk_sp<SkShader> make_shader2() {
return SkShader::MakeColorShader(SK_ColorBLUE);
}
static sk_sp<SkColorFilter> make_color_filter() {
return SkColorFilter::MakeModeFilter(0xFFAABBCC, SkXfermode::kDarken_Mode);
}
class VerticesGM : public skiagm::GM {
SkPoint fPts[9];
SkPoint fTexs[9];
SkColor fColors[9];
sk_sp<SkShader> fShader1;
sk_sp<SkShader> fShader2;
sk_sp<SkColorFilter> fColorFilter;
public:
VerticesGM() {}
protected:
void onOnceBeforeDraw() override {
const SkScalar X = 30;
const SkScalar Y = 30;
fPts[0].set(0, 0); fPts[1].set(X/2, 3); fPts[2].set(X, 0);
fPts[3].set(3, Y/2); fPts[4].set(X/2, Y/2); fPts[5].set(X-3, Y/2);
fPts[6].set(0, Y); fPts[7].set(X/2, Y-3); fPts[8].set(X, Y);
const SkScalar w = 40;
const SkScalar h = 40;
fTexs[0].set(0, 0); fTexs[1].set(w/2, 0); fTexs[2].set(w, 0);
fTexs[3].set(0, h/2); fTexs[4].set(w/2, h/2); fTexs[5].set(w, h/2);
fTexs[6].set(0, h); fTexs[7].set(w/2, h); fTexs[8].set(w, h);
fShader1 = make_shader1(w, h);
fShader2 = make_shader2();
fColorFilter = make_color_filter();
SkRandom rand;
for (size_t i = 0; i < SK_ARRAY_COUNT(fColors); ++i) {
fColors[i] = rand.nextU() | 0xFF000000;
}
}
SkString onShortName() override {
SkString name("vertices");
return name;
}
SkISize onISize() override {
return SkISize::Make(600, 600);
}
void onDraw(SkCanvas* canvas) override {
// start with the center of a 3x3 grid
constexpr uint16_t fan[] = {
4,
0, 1, 2, 5, 8, 7, 6, 3, 0
};
const struct {
const SkColor* fColors;
const SkPoint* fTexs;
const sk_sp<SkShader>& fShader;
const sk_sp<SkColorFilter>& fColorFilter;
uint8_t fAlpha;
} rec[] = {
{ fColors, nullptr, fShader1, nullptr , 0xFF },
{ nullptr, fTexs , fShader1, nullptr , 0xFF },
{ fColors, fTexs , fShader1, nullptr , 0xFF },
{ fColors, nullptr, fShader2, nullptr , 0xFF },
{ nullptr, fTexs , fShader2, nullptr , 0xFF },
{ fColors, fTexs , fShader2, nullptr , 0xFF },
{ fColors, nullptr, fShader1, fColorFilter, 0xFF },
{ nullptr, fTexs , fShader1, fColorFilter, 0xFF },
{ fColors, fTexs , fShader1, fColorFilter, 0xFF },
{ fColors, nullptr, fShader2, fColorFilter, 0xFF },
{ nullptr, fTexs , fShader2, fColorFilter, 0xFF },
{ fColors, fTexs , fShader2, fColorFilter, 0xFF },
{ fColors, nullptr, fShader1, nullptr , 0x80 },
{ nullptr, fTexs , fShader1, nullptr , 0x80 },
{ fColors, fTexs , fShader1, nullptr , 0x80 },
{ fColors, nullptr, fShader2, nullptr , 0x80 },
{ nullptr, fTexs , fShader2, nullptr , 0x80 },
{ fColors, fTexs , fShader2, nullptr , 0x80 },
{ fColors, nullptr, fShader1, fColorFilter, 0x80 },
{ nullptr, fTexs , fShader1, fColorFilter, 0x80 },
{ fColors, fTexs , fShader1, fColorFilter, 0x80 },
{ fColors, nullptr, fShader2, fColorFilter, 0x80 },
{ nullptr, fTexs , fShader2, fColorFilter, 0x80 },
{ fColors, fTexs , fShader2, fColorFilter, 0x80 },
};
const SkXfermode::Mode modes[] = {
SkXfermode::kClear_Mode,
SkXfermode::kSrc_Mode,
SkXfermode::kDst_Mode,
SkXfermode::kSrcOver_Mode,
SkXfermode::kDstOver_Mode,
SkXfermode::kSrcIn_Mode,
SkXfermode::kDstIn_Mode,
SkXfermode::kSrcOut_Mode,
SkXfermode::kDstOut_Mode,
SkXfermode::kSrcATop_Mode,
SkXfermode::kDstATop_Mode,
SkXfermode::kXor_Mode,
SkXfermode::kPlus_Mode,
SkXfermode::kModulate_Mode,
SkXfermode::kScreen_Mode,
SkXfermode::kOverlay_Mode,
SkXfermode::kDarken_Mode,
SkXfermode::kLighten_Mode,
SkXfermode::kColorDodge_Mode,
SkXfermode::kColorBurn_Mode,
SkXfermode::kHardLight_Mode,
SkXfermode::kSoftLight_Mode,
SkXfermode::kDifference_Mode,
SkXfermode::kExclusion_Mode,
SkXfermode::kMultiply_Mode,
SkXfermode::kHue_Mode,
SkXfermode::kSaturation_Mode,
SkXfermode::kColor_Mode,
SkXfermode::kLuminosity_Mode,
};
SkPaint paint;
canvas->translate(4, 4);
int x = 0;
for (size_t j = 0; j < SK_ARRAY_COUNT(modes); ++j) {
auto xfer = SkXfermode::Make(modes[j]);
canvas->save();
for (size_t i = 0; i < SK_ARRAY_COUNT(rec); ++i) {
paint.setShader(rec[i].fShader);
paint.setColorFilter(rec[i].fColorFilter);
paint.setAlpha(rec[i].fAlpha);
//if (2 == x)
canvas->drawVertices(SkCanvas::kTriangleFan_VertexMode,
SK_ARRAY_COUNT(fPts), fPts,
rec[i].fTexs, rec[i].fColors,
xfer, fan, SK_ARRAY_COUNT(fan), paint);
canvas->translate(40, 0);
++x;
}
canvas->restore();
canvas->translate(0, 40);
}
}
private:
typedef skiagm::GM INHERITED;
};
/////////////////////////////////////////////////////////////////////////////////////
DEF_GM(return new VerticesGM();)
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