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#include "SampleCode.h"
#include "SkView.h"
#include "SkCanvas.h"
#include "Sk64.h"
#include "SkCornerPathEffect.h"
#include "SkGradientShader.h"
#include "SkGraphics.h"
#include "SkImageDecoder.h"
#include "SkKernel33MaskFilter.h"
#include "SkPath.h"
#include "SkRandom.h"
#include "SkRegion.h"
#include "SkShader.h"
#include "SkUtils.h"
#include "SkColorPriv.h"
#include "SkColorFilter.h"
#include "SkTime.h"
#include "SkTypeface.h"
#include "SkXfermode.h"
#include "SkStream.h"
#include "SkXMLParser.h"
#include "SkColorPriv.h"
#include "SkImageDecoder.h"
static int newscale(U8CPU a, U8CPU b, int shift) {
unsigned prod = a * b + (1 << (shift - 1));
return (prod + (prod >> shift)) >> shift;
}
static void test_srcover565(SkCanvas* canvas) {
const int width = 32;
SkBitmap bm1, bm2, bm3;
bm1.setConfig(SkBitmap::kRGB_565_Config, width, 256); bm1.allocPixels(NULL);
bm2.setConfig(SkBitmap::kRGB_565_Config, width, 256); bm2.allocPixels(NULL);
bm3.setConfig(SkBitmap::kRGB_565_Config, width, 256); bm3.allocPixels(NULL);
int rgb = 0x18;
int r = rgb >> 3;
int g = rgb >> 2;
uint16_t dst = SkPackRGB16(r, g, r);
for (int alpha = 0; alpha <= 255; alpha++) {
SkPMColor pm = SkPreMultiplyARGB(alpha, rgb, rgb, rgb);
uint16_t newdst = SkSrcOver32To16(pm, dst);
sk_memset16(bm1.getAddr16(0, alpha), newdst, bm1.width());
int ia = 255 - alpha;
int iscale = SkAlpha255To256(ia);
int dr = (SkGetPackedR32(pm) + (r * iscale >> 5)) >> 3;
int dg = (SkGetPackedG32(pm) + (g * iscale >> 6)) >> 2;
sk_memset16(bm2.getAddr16(0, alpha), SkPackRGB16(dr, dg, dr), bm2.width());
int dr2 = (SkMulDiv255Round(alpha, rgb) + newscale(r, ia, 5)) >> 3;
int dg2 = (SkMulDiv255Round(alpha, rgb) + newscale(g, ia, 6)) >> 2;
sk_memset16(bm3.getAddr16(0, alpha), SkPackRGB16(dr2, dg2, dr2), bm3.width());
// if (mr != dr || mg != dg)
{
// SkDebugf("[%d] macro [%d %d] inline [%d %d] new [%d %d]\n", alpha, mr, mg, dr, dg, dr2, dg2);
}
}
SkScalar dx = SkIntToScalar(width+4);
canvas->drawBitmap(bm1, 0, 0, NULL); canvas->translate(dx, 0);
canvas->drawBitmap(bm2, 0, 0, NULL); canvas->translate(dx, 0);
canvas->drawBitmap(bm3, 0, 0, NULL); canvas->translate(dx, 0);
SkRect rect = { 0, 0, SkIntToScalar(bm1.width()), SkIntToScalar(bm1.height()) };
SkPaint p;
p.setARGB(0xFF, rgb, rgb, rgb);
canvas->drawRect(rect, p);
}
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 XfermodesView : public SkView {
SkBitmap fBitmap;
SkBitmap fBG;
SkBitmap fSrcB, fDstB;
void draw_mode(SkCanvas* canvas, SkXfermode* mode, int alpha) {
SkPaint p;
canvas->drawBitmap(fSrcB, 0, 0, &p);
p.setAlpha(alpha);
p.setXfermode(mode);
canvas->drawBitmap(fDstB, 0, 0, &p);
}
public:
XfermodesView() {
const int W = 64;
const int H = 64;
fBitmap.setConfig(SkBitmap::kARGB_8888_Config, W, H);
fBitmap.allocPixels();
fBG.setConfig(SkBitmap::kARGB_4444_Config, 2, 2, 4);
fBG.setPixels(gBG);
fBG.setIsOpaque(true);
make_bitmaps(W, H, &fSrcB, &fDstB);
}
protected:
// overrides from SkEventSink
virtual bool onQuery(SkEvent* evt) {
if (SampleCode::TitleQ(*evt)) {
SampleCode::TitleR(evt, "Xfermodes");
return true;
}
return this->INHERITED::onQuery(evt);
}
void drawBG(SkCanvas* canvas) {
canvas->drawColor(SK_ColorWHITE);
return;
SkShader* s = SkShader::CreateBitmapShader(fBG,
SkShader::kRepeat_TileMode,
SkShader::kRepeat_TileMode);
SkPaint p;
SkMatrix m;
p.setShader(s)->unref();
m.setScale(SkIntToScalar(8), SkIntToScalar(8));
s->setLocalMatrix(m);
canvas->drawPaint(p);
}
virtual void onDraw(SkCanvas* canvas) {
this->drawBG(canvas);
if (false) {
test_srcover565(canvas);
}
if (false) {
SkPaint paint;
paint.setFlags(0x43);
paint.setTextSize(SkIntToScalar(128));
SkMatrix matrix;
matrix.reset();
matrix.set(0, 0x0019d049);
matrix.set(2, 0x712cf400);
matrix.set(4, 0x0019c96f);
matrix.set(5, 0xF8d76598);
canvas->concat(matrix);
canvas->drawText("HamburgefonsHamburgefonsHamburgefonsHamburgefons",
48, 0, 0, paint);
return;
}
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" },
};
canvas->translate(SkIntToScalar(10), SkIntToScalar(20));
SkCanvas c(fBitmap);
const SkScalar w = SkIntToScalar(fBitmap.width());
const SkScalar h = SkIntToScalar(fBitmap.height());
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);
fBitmap.eraseColor(0);
draw_mode(&c, mode, twice ? 0x88 : 0xFF);
SkSafeUnref(mode);
SkPaint p;
SkRect r;
r.set(x, y, x+w, y+h);
r.inset(-SK_ScalarHalf, -SK_ScalarHalf);
p.setStyle(SkPaint::kStroke_Style);
canvas->drawRect(r, p);
p.setStyle(SkPaint::kFill_Style);
p.setShader(s);
r.inset(SK_ScalarHalf, SK_ScalarHalf);
canvas->drawRect(r, p);
canvas->drawBitmap(fBitmap, x, y, NULL);
canvas->drawText(gModes[i].fLabel, strlen(gModes[i].fLabel),
x + w/2, y - labelP.getTextSize()/2, labelP);
x += w + SkIntToScalar(10);
if ((i % W) == W - 1) {
x = x0;
y += h + SkIntToScalar(30);
}
}
x0 += SkIntToScalar(400);
}
s->unref();
}
private:
typedef SkView INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
static SkView* MyFactory() { return new XfermodesView; }
static SkViewRegister reg(MyFactory);
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