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skia2/gm/xfermodeimagefilter.cpp
Ben Wagner 7fde8e1728 IWYU for gms. 
This almost gets gms to be iwyu clean. The last bit is around gm.cpp
and the tracing framework and its use of atomic. Will also need a way
of keeping things from regressing, which is difficult due to needing to
do this outside-in.

Change-Id: I1393531e99da8b0f1a29f55c53c86d53f459af7d
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/211593
Reviewed-by: Herb Derby <herb@google.com>
Commit-Queue: Ben Wagner <bungeman@google.com>
2019-05-02 17:48:53 +00:00

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9.7 KiB
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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/gm.h"
#include "include/core/SkBitmap.h"
#include "include/core/SkBlendMode.h"
#include "include/core/SkCanvas.h"
#include "include/core/SkColor.h"
#include "include/core/SkImage.h"
#include "include/core/SkImageFilter.h"
#include "include/core/SkPaint.h"
#include "include/core/SkRect.h"
#include "include/core/SkRefCnt.h"
#include "include/core/SkScalar.h"
#include "include/core/SkSize.h"
#include "include/core/SkString.h"
#include "include/core/SkTypes.h"
#include "include/effects/SkArithmeticImageFilter.h"
#include "include/effects/SkImageSource.h"
#include "include/effects/SkOffsetImageFilter.h"
#include "include/effects/SkXfermodeImageFilter.h"
#include "tools/ToolUtils.h"
#include <utility>
#define WIDTH 600
#define HEIGHT 700
#define MARGIN 12
namespace skiagm {
class XfermodeImageFilterGM : public GM {
public:
XfermodeImageFilterGM(){
this->setBGColor(0xFF000000);
}
protected:
SkString onShortName() override {
return SkString("xfermodeimagefilter");
}
SkISize onISize() override {
return SkISize::Make(WIDTH, HEIGHT);
}
void onOnceBeforeDraw() override {
fBitmap = ToolUtils::create_string_bitmap(80, 80, 0xD000D000, 15, 65, 96, "e");
fCheckerboard = SkImage::MakeFromBitmap(
ToolUtils::create_checkerboard_bitmap(80, 80, 0xFFA0A0A0, 0xFF404040, 8));
}
void onDraw(SkCanvas* canvas) override {
canvas->clear(SK_ColorBLACK);
SkPaint paint;
const SkBlendMode gModes[] = {
SkBlendMode::kClear,
SkBlendMode::kSrc,
SkBlendMode::kDst,
SkBlendMode::kSrcOver,
SkBlendMode::kDstOver,
SkBlendMode::kSrcIn,
SkBlendMode::kDstIn,
SkBlendMode::kSrcOut,
SkBlendMode::kDstOut,
SkBlendMode::kSrcATop,
SkBlendMode::kDstATop,
SkBlendMode::kXor,
SkBlendMode::kPlus,
SkBlendMode::kModulate,
SkBlendMode::kScreen,
SkBlendMode::kOverlay,
SkBlendMode::kDarken,
SkBlendMode::kLighten,
SkBlendMode::kColorDodge,
SkBlendMode::kColorBurn,
SkBlendMode::kHardLight,
SkBlendMode::kSoftLight,
SkBlendMode::kDifference,
SkBlendMode::kExclusion,
SkBlendMode::kMultiply,
SkBlendMode::kHue,
SkBlendMode::kSaturation,
SkBlendMode::kColor,
SkBlendMode::kLuminosity,
};
int x = 0, y = 0;
sk_sp<SkImageFilter> background(SkImageSource::Make(fCheckerboard));
for (size_t i = 0; i < SK_ARRAY_COUNT(gModes); i++) {
paint.setImageFilter(SkXfermodeImageFilter::Make(gModes[i], background));
DrawClippedBitmap(canvas, fBitmap, paint, x, y);
x += fBitmap.width() + MARGIN;
if (x + fBitmap.width() > WIDTH) {
x = 0;
y += fBitmap.height() + MARGIN;
}
}
// Test arithmetic mode as image filter
paint.setImageFilter(SkArithmeticImageFilter::Make(0, 1, 1, 0, true, background,
nullptr, nullptr));
DrawClippedBitmap(canvas, fBitmap, paint, x, y);
x += fBitmap.width() + MARGIN;
if (x + fBitmap.width() > WIDTH) {
x = 0;
y += fBitmap.height() + MARGIN;
}
// Test nullptr mode
paint.setImageFilter(SkXfermodeImageFilter::Make(SkBlendMode::kSrcOver, background));
DrawClippedBitmap(canvas, fBitmap, paint, x, y);
x += fBitmap.width() + MARGIN;
if (x + fBitmap.width() > WIDTH) {
x = 0;
y += fBitmap.height() + MARGIN;
}
SkRect clipRect = SkRect::MakeWH(SkIntToScalar(fBitmap.width() + 4),
SkIntToScalar(fBitmap.height() + 4));
// Test offsets on SrcMode (uses fixed-function blend)
sk_sp<SkImage> bitmapImage(SkImage::MakeFromBitmap(fBitmap));
sk_sp<SkImageFilter> foreground(SkImageSource::Make(std::move(bitmapImage)));
sk_sp<SkImageFilter> offsetForeground(SkOffsetImageFilter::Make(SkIntToScalar(4),
SkIntToScalar(-4),
foreground));
sk_sp<SkImageFilter> offsetBackground(SkOffsetImageFilter::Make(SkIntToScalar(4),
SkIntToScalar(4),
background));
paint.setImageFilter(SkXfermodeImageFilter::Make(SkBlendMode::kSrcOver,
offsetBackground,
offsetForeground,
nullptr));
DrawClippedPaint(canvas, clipRect, paint, x, y);
x += fBitmap.width() + MARGIN;
if (x + fBitmap.width() > WIDTH) {
x = 0;
y += fBitmap.height() + MARGIN;
}
// Test offsets on Darken (uses shader blend)
paint.setImageFilter(SkXfermodeImageFilter::Make(SkBlendMode::kDarken,
offsetBackground,
offsetForeground,
nullptr));
DrawClippedPaint(canvas, clipRect, paint, x, y);
x += fBitmap.width() + MARGIN;
if (x + fBitmap.width() > WIDTH) {
x = 0;
y += fBitmap.height() + MARGIN;
}
// Test cropping
constexpr size_t nbSamples = 3;
const SkBlendMode sampledModes[nbSamples] = {
SkBlendMode::kOverlay, SkBlendMode::kSrcOver, SkBlendMode::kPlus
};
int offsets[nbSamples][4] = {{ 10, 10, -16, -16},
{ 10, 10, 10, 10},
{-10, -10, -6, -6}};
for (size_t i = 0; i < nbSamples; ++i) {
SkIRect cropRect = SkIRect::MakeXYWH(offsets[i][0],
offsets[i][1],
fBitmap.width() + offsets[i][2],
fBitmap.height() + offsets[i][3]);
SkImageFilter::CropRect rect(SkRect::Make(cropRect));
paint.setImageFilter(SkXfermodeImageFilter::Make(sampledModes[i],
offsetBackground,
offsetForeground,
&rect));
DrawClippedPaint(canvas, clipRect, paint, x, y);
x += fBitmap.width() + MARGIN;
if (x + fBitmap.width() > WIDTH) {
x = 0;
y += fBitmap.height() + MARGIN;
}
}
// Test small bg, large fg with Screen (uses shader blend)
SkBlendMode mode = SkBlendMode::kScreen;
SkImageFilter::CropRect cropRect(SkRect::MakeXYWH(10, 10, 60, 60));
sk_sp<SkImageFilter> cropped(SkOffsetImageFilter::Make(0, 0, foreground, &cropRect));
paint.setImageFilter(SkXfermodeImageFilter::Make(mode, cropped, background, nullptr));
DrawClippedPaint(canvas, clipRect, paint, x, y);
x += fBitmap.width() + MARGIN;
if (x + fBitmap.width() > WIDTH) {
x = 0;
y += fBitmap.height() + MARGIN;
}
// Test small fg, large bg with Screen (uses shader blend)
paint.setImageFilter(SkXfermodeImageFilter::Make(mode, background, cropped, nullptr));
DrawClippedPaint(canvas, clipRect, paint, x, y);
x += fBitmap.width() + MARGIN;
if (x + fBitmap.width() > WIDTH) {
x = 0;
y += fBitmap.height() + MARGIN;
}
// Test small fg, large bg with SrcIn with a crop that forces it to full size.
// This tests that SkXfermodeImageFilter correctly applies the compositing mode to
// the region outside the foreground.
mode = SkBlendMode::kSrcIn;
SkImageFilter::CropRect cropRectFull(SkRect::MakeXYWH(0, 0, 80, 80));
paint.setImageFilter(SkXfermodeImageFilter::Make(mode, background,
cropped, &cropRectFull));
DrawClippedPaint(canvas, clipRect, paint, x, y);
x += fBitmap.width() + MARGIN;
if (x + fBitmap.width() > WIDTH) {
x = 0;
y += fBitmap.height() + MARGIN;
}
}
private:
static void DrawClippedBitmap(SkCanvas* canvas, const SkBitmap& bitmap, const SkPaint& paint,
int x, int y) {
canvas->save();
canvas->translate(SkIntToScalar(x), SkIntToScalar(y));
canvas->clipRect(SkRect::MakeIWH(bitmap.width(), bitmap.height()));
canvas->drawBitmap(bitmap, 0, 0, &paint);
canvas->restore();
}
static void DrawClippedPaint(SkCanvas* canvas, const SkRect& rect, const SkPaint& paint,
int x, int y) {
canvas->save();
canvas->translate(SkIntToScalar(x), SkIntToScalar(y));
canvas->clipRect(rect);
canvas->drawPaint(paint);
canvas->restore();
}
SkBitmap fBitmap;
sk_sp<SkImage> fCheckerboard;
typedef GM INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
DEF_GM( return new XfermodeImageFilterGM; );
}
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