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/*
* Copyright 2012 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 "SkBitmapProcShader.h"
#include "SkColorFilter.h"
#include "SkGradientShader.h"
#define WIDTH 512
#define HEIGHT 1024
namespace skiagm {
// Using gradients because GPU doesn't currently have an implementation of SkColorShader (duh!)
static SkShader* make_color_shader(SkColor color) {
static const SkPoint kPts[] = {{0, 0}, {1, 1}};
SkColor colors[] = {color, color};
return SkGradientShader::CreateLinear(kPts, colors, NULL, 2, SkShader::kClamp_TileMode);
}
static SkShader* make_solid_shader() {
return make_color_shader(SkColorSetARGB(0xFF, 0x40, 0x80, 0x20));
}
static SkShader* make_transparent_shader() {
return make_color_shader(SkColorSetARGB(0x80, 0x10, 0x70, 0x20));
}
static SkShader* make_trans_black_shader() {
return make_color_shader(0x0);
}
// draws a background behind each test rect to see transparency
static SkShader* make_bg_shader(int checkSize) {
SkBitmap bmp;
bmp.allocN32Pixels(2 * checkSize, 2 * checkSize);
SkCanvas canvas(bmp);
canvas.clear(0xFF800000);
SkPaint paint;
paint.setColor(0xFF000080);
SkRect rect0 = SkRect::MakeXYWH(0, 0,
SkIntToScalar(checkSize), SkIntToScalar(checkSize));
SkRect rect1 = SkRect::MakeXYWH(SkIntToScalar(checkSize), SkIntToScalar(checkSize),
SkIntToScalar(checkSize), SkIntToScalar(checkSize));
canvas.drawRect(rect1, paint);
canvas.drawRect(rect0, paint);
return SkNEW_ARGS(SkBitmapProcShader, (bmp, SkShader::kRepeat_TileMode,
SkShader::kRepeat_TileMode));
}
class ModeColorFilterGM : public GM {
public:
ModeColorFilterGM() {
this->setBGColor(0xFF303030);
}
protected:
virtual SkString onShortName() {
return SkString("modecolorfilters");
}
virtual SkISize onISize() {
return make_isize(WIDTH, HEIGHT);
}
virtual void onDraw(SkCanvas* canvas) {
// size of rect for each test case
static const int kRectWidth = 20;
static const int kRectHeight = 20;
static const int kCheckSize = 10;
if (!fBmpShader) {
fBmpShader.reset(make_bg_shader(kCheckSize));
}
SkPaint bgPaint;
bgPaint.setShader(fBmpShader);
bgPaint.setXfermodeMode(SkXfermode::kSrc_Mode);
SkShader* shaders[] = {
NULL, // use a paint color instead of a shader
make_solid_shader(),
make_transparent_shader(),
make_trans_black_shader(),
};
// used without shader
SkColor colors[] = {
SkColorSetARGB(0xFF, 0xFF, 0xFF, 0xFF),
SkColorSetARGB(0xFF, 0x00, 0x00, 0x00),
SkColorSetARGB(0x00, 0x00, 0x00, 0x00),
SkColorSetARGB(0xFF, 0x10, 0x20, 0x40),
SkColorSetARGB(0xA0, 0x20, 0x30, 0x90),
};
// used with shaders
SkColor alphas[] = {0xFFFFFFFF, 0x80808080};
SkXfermode::Mode modes[] = { // currently just doing the Modes expressible as Coeffs
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,
};
SkPaint paint;
int idx = 0;
static const int kRectsPerRow = SkMax32(this->getISize().fWidth / kRectWidth, 1);
for (size_t cfm = 0; cfm < SK_ARRAY_COUNT(modes); ++cfm) {
for (size_t cfc = 0; cfc < SK_ARRAY_COUNT(colors); ++cfc) {
SkAutoTUnref<SkColorFilter> cf(SkColorFilter::CreateModeFilter(colors[cfc],
modes[cfm]));
paint.setColorFilter(cf);
for (size_t s = 0; s < SK_ARRAY_COUNT(shaders); ++s) {
paint.setShader(shaders[s]);
bool hasShader = NULL == paint.getShader();
int paintColorCnt = hasShader ? SK_ARRAY_COUNT(alphas) : SK_ARRAY_COUNT(colors);
SkColor* paintColors = hasShader ? alphas : colors;
for (int pc = 0; pc < paintColorCnt; ++pc) {
paint.setColor(paintColors[pc]);
SkScalar x = SkIntToScalar(idx % kRectsPerRow);
SkScalar y = SkIntToScalar(idx / kRectsPerRow);
SkRect rect = SkRect::MakeXYWH(x * kRectWidth, y * kRectHeight,
SkIntToScalar(kRectWidth),
SkIntToScalar(kRectHeight));
canvas->saveLayer(&rect, NULL);
canvas->drawRect(rect, bgPaint);
canvas->drawRect(rect, paint);
canvas->restore();
++idx;
}
}
}
}
for (size_t i = 0; i < SK_ARRAY_COUNT(shaders); ++i) {
SkSafeUnref(shaders[i]);
}
}
private:
SkAutoTUnref<SkShader> fBmpShader;
typedef GM INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
static GM* MyFactory(void*) { return new ModeColorFilterGM; }
static GMRegistry reg(MyFactory);
}
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