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/*
* Copyright 2017 Google Inc.
*
* Use of this source code is governed by a BD-style license that can be
* found in the LICENSE file.
*/
#include "gm.h"
#include "sk_tool_utils.h"
#include "SkBlurMask.h"
#include "SkCanvas.h"
#include "SkMaskFilter.h"
#include "SkPaint.h"
// This GM tests out the SkBlurMaskFilter's kIgnoreTransform flag. That flag causes the blur mask
// filter to not apply the CTM to the blur's radius.
class BlurIgnoreXformGM : public skiagm::GM {
public:
enum class DrawType {
kCircle,
kRect,
kRRect,
};
BlurIgnoreXformGM(DrawType drawType) : fDrawType(drawType) { }
protected:
bool runAsBench() const override { return true; }
SkString onShortName() override {
SkString name;
name.printf("blur_ignore_xform_%s",
DrawType::kCircle == fDrawType ? "circle"
: DrawType::kRect == fDrawType ? "rect" : "rrect");
return name;
}
SkISize onISize() override {
return SkISize::Make(375, 475);
}
void onOnceBeforeDraw() override {
for (int i = 0; i < kNumBlurs; ++i) {
fBlurFilters[i] = SkMaskFilter::MakeBlur(
kNormal_SkBlurStyle,
SkBlurMask::ConvertRadiusToSigma(SkIntToScalar(20)),
kBlurFlags[i].fRespectCTM);
}
}
void onDraw(SkCanvas* canvas) override {
SkPaint paint;
paint.setColor(SK_ColorBLACK);
paint.setAntiAlias(true);
canvas->translate(10, 25);
canvas->save();
canvas->translate(80, 0);
for (size_t i = 0; i < kNumBlurs; ++i) {
SkAutoCanvasRestore autoRestore(canvas, true);
canvas->translate(SkIntToScalar(i * 150), 0);
for (auto scale : kMatrixScales) {
canvas->save();
canvas->scale(scale.fScale, scale.fScale);
static const SkScalar kRadius = 20.0f;
SkScalar coord = 50.0f * 1.0f / scale.fScale;
SkRect rect = SkRect::MakeXYWH(coord - kRadius , coord - kRadius,
2 * kRadius, 2 * kRadius);
SkRRect rrect = SkRRect::MakeRectXY(rect, kRadius/2.0f, kRadius/2.0f);
paint.setMaskFilter(fBlurFilters[i]);
for (int j = 0; j < 2; ++j) {
canvas->save();
canvas->translate(10 * (1 - j), 10 * (1 - j));
if (DrawType::kCircle == fDrawType) {
canvas->drawCircle(coord, coord, kRadius, paint);
} else if (DrawType::kRect == fDrawType) {
canvas->drawRect(rect, paint);
} else {
canvas->drawRRect(rrect, paint);
}
paint.setMaskFilter(nullptr);
canvas->restore();
}
canvas->restore();
canvas->translate(0, SkIntToScalar(150));
}
}
canvas->restore();
if (kBench_Mode != this->getMode()) {
this->drawOverlay(canvas);
}
}
void drawOverlay(SkCanvas* canvas) {
canvas->translate(10, 0);
SkPaint textPaint;
sk_tool_utils::set_portable_typeface(&textPaint);
textPaint.setAntiAlias(true);
canvas->save();
for (int i = 0; i < kNumBlurs; ++i) {
canvas->drawString(kBlurFlags[i].fName, 100, 0, textPaint);
canvas->translate(SkIntToScalar(130), 0);
}
canvas->restore();
for (auto scale : kMatrixScales) {
canvas->drawString(scale.fName, 0, 50, textPaint);
canvas->translate(0, SkIntToScalar(150));
}
}
private:
static constexpr int kNumBlurs = 2;
static const struct BlurFlags {
bool fRespectCTM;
const char* fName;
} kBlurFlags[kNumBlurs];
static const struct MatrixScale {
float fScale;
const char* fName;
} kMatrixScales[3];
DrawType fDrawType;
sk_sp<SkMaskFilter> fBlurFilters[kNumBlurs];
typedef skiagm::GM INHERITED;
};
const BlurIgnoreXformGM::BlurFlags BlurIgnoreXformGM::kBlurFlags[] = {
{true, "none"},
{false, "IgnoreTransform"}
};
const BlurIgnoreXformGM::MatrixScale BlurIgnoreXformGM::kMatrixScales[] = {
{1.0f, "Identity"},
{0.5f, "Scale = 0.5"},
{2.0f, "Scale = 2.0"}
};
DEF_GM(return new BlurIgnoreXformGM(BlurIgnoreXformGM::DrawType::kCircle);)
DEF_GM(return new BlurIgnoreXformGM(BlurIgnoreXformGM::DrawType::kRect);)
DEF_GM(return new BlurIgnoreXformGM(BlurIgnoreXformGM::DrawType::kRRect);)
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