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#include "gm.h"
#include "SkBitmap.h"
#include "SkShader.h"
#include "SkXfermode.h"
namespace skiagm {
static void make_bitmaps(int w, int h, SkBitmap* src, SkBitmap* dst) {
src->setConfig(SkBitmap::kARGB_8888_Config, w, h);
src->allocPixels();
src->eraseColor(0);
SkCanvas c(*src);
SkPaint p;
SkRect r;
SkScalar ww = SkIntToScalar(w);
SkScalar hh = SkIntToScalar(h);
p.setAntiAlias(true);
p.setColor(0xFFFFCC44);
r.set(0, 0, ww*3/4, hh*3/4);
c.drawOval(r, p);
dst->setConfig(SkBitmap::kARGB_8888_Config, w, h);
dst->allocPixels();
dst->eraseColor(0);
c.setBitmapDevice(*dst);
p.setColor(0xFF66AAFF);
r.set(ww/3, hh/3, ww*19/20, hh*19/20);
c.drawRect(r, p);
}
static uint16_t gBG[] = { 0xFFFF, 0xCCCF, 0xCCCF, 0xFFFF };
class XfermodesGM : public GM {
SkBitmap fBG;
SkBitmap fSrcB, fDstB;
void draw_mode(SkCanvas* canvas, SkXfermode* mode, int alpha,
SkScalar x, SkScalar y) {
SkPaint p;
canvas->drawBitmap(fSrcB, x, y, &p);
p.setAlpha(alpha);
p.setXfermode(mode);
canvas->drawBitmap(fDstB, x, y, &p);
}
public:
const static int W = 64;
const static int H = 64;
XfermodesGM() {
// Do all this work in a temporary so we get a deep copy,
// especially of gBG.
SkBitmap scratchBitmap;
scratchBitmap.setConfig(SkBitmap::kARGB_4444_Config, 2, 2, 4);
scratchBitmap.setPixels(gBG);
scratchBitmap.setIsOpaque(true);
scratchBitmap.copyTo(&fBG, SkBitmap::kARGB_4444_Config);
make_bitmaps(W, H, &fSrcB, &fDstB);
}
protected:
virtual SkString onShortName() {
return SkString("xfermodes");
}
virtual SkISize onISize() {
return make_isize(790, 640);
}
void drawBG(SkCanvas* canvas) {
canvas->drawColor(SK_ColorWHITE);
}
virtual void onDraw(SkCanvas* canvas) {
canvas->translate(SkIntToScalar(10), SkIntToScalar(20));
this->drawBG(canvas);
const struct {
SkXfermode::Mode fMode;
const char* fLabel;
} gModes[] = {
{ SkXfermode::kClear_Mode, "Clear" },
{ SkXfermode::kSrc_Mode, "Src" },
{ SkXfermode::kDst_Mode, "Dst" },
{ SkXfermode::kSrcOver_Mode, "SrcOver" },
{ SkXfermode::kDstOver_Mode, "DstOver" },
{ SkXfermode::kSrcIn_Mode, "SrcIn" },
{ SkXfermode::kDstIn_Mode, "DstIn" },
{ SkXfermode::kSrcOut_Mode, "SrcOut" },
{ SkXfermode::kDstOut_Mode, "DstOut" },
{ SkXfermode::kSrcATop_Mode, "SrcATop" },
{ SkXfermode::kDstATop_Mode, "DstATop" },
{ SkXfermode::kXor_Mode, "Xor" },
{ SkXfermode::kPlus_Mode, "Plus" },
{ SkXfermode::kMultiply_Mode, "Multiply" },
{ SkXfermode::kScreen_Mode, "Screen" },
{ SkXfermode::kOverlay_Mode, "Overlay" },
{ SkXfermode::kDarken_Mode, "Darken" },
{ SkXfermode::kLighten_Mode, "Lighten" },
{ SkXfermode::kColorDodge_Mode, "ColorDodge" },
{ SkXfermode::kColorBurn_Mode, "ColorBurn" },
{ SkXfermode::kHardLight_Mode, "HardLight" },
{ SkXfermode::kSoftLight_Mode, "SoftLight" },
{ SkXfermode::kDifference_Mode, "Difference" },
{ SkXfermode::kExclusion_Mode, "Exclusion" },
};
const SkScalar w = SkIntToScalar(W);
const SkScalar h = SkIntToScalar(H);
SkShader* s = SkShader::CreateBitmapShader(fBG,
SkShader::kRepeat_TileMode,
SkShader::kRepeat_TileMode);
SkMatrix m;
m.setScale(SkIntToScalar(6), SkIntToScalar(6));
s->setLocalMatrix(m);
SkPaint labelP;
labelP.setAntiAlias(true);
labelP.setTextAlign(SkPaint::kCenter_Align);
const int W = 5;
SkScalar x0 = 0;
for (int twice = 0; twice < 2; twice++) {
SkScalar x = x0, y = 0;
for (size_t i = 0; i < SK_ARRAY_COUNT(gModes); i++) {
SkXfermode* mode = SkXfermode::Create(gModes[i].fMode);
SkAutoUnref aur(mode);
SkRect r;
r.set(x, y, x+w, y+h);
SkPaint p;
p.setStyle(SkPaint::kFill_Style);
p.setShader(s);
canvas->drawRect(r, p);
canvas->saveLayer(&r, NULL, SkCanvas::kARGB_ClipLayer_SaveFlag);
draw_mode(canvas, mode, twice ? 0x88 : 0xFF, r.fLeft, r.fTop);
canvas->restore();
r.inset(-SK_ScalarHalf, -SK_ScalarHalf);
p.setStyle(SkPaint::kStroke_Style);
p.setShader(NULL);
canvas->drawRect(r, p);
#if 1
canvas->drawText(gModes[i].fLabel, strlen(gModes[i].fLabel),
x + w/2, y - labelP.getTextSize()/2, labelP);
#endif
x += w + SkIntToScalar(10);
if ((i % W) == W - 1) {
x = x0;
y += h + SkIntToScalar(30);
}
}
x0 += SkIntToScalar(400);
}
s->unref();
}
private:
typedef GM INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
static GM* MyFactory(void*) { return new XfermodesGM; }
static GMRegistry reg(MyFactory);
}
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