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Unified Diff: gm/imagefilterscropexpand.cpp

Issue 198003008: Implement support for expanding crop rects in image filters (Closed) Base URL: https://skia.googlecode.com/svn/trunk
Patch Set: Fix ImageFilterTest Created 6 years, 9 months ago
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Index: gm/imagefilterscropexpand.cpp
diff --git a/gm/imagefilterscropexpand.cpp b/gm/imagefilterscropexpand.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..93736967732befef85d272ac96741f38a2a82486
--- /dev/null
+++ b/gm/imagefilterscropexpand.cpp
@@ -0,0 +1,170 @@
+/*
+ * Copyright 2014 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 "SkCanvas.h"
+#include "SkColorFilter.h"
+#include "SkColorPriv.h"
+#include "SkShader.h"
+
+#include "SkBitmapSource.h"
+#include "SkBlurImageFilter.h"
+#include "SkColorMatrixFilter.h"
+#include "SkDisplacementMapEffect.h"
+#include "SkDropShadowImageFilter.h"
+#include "SkGradientShader.h"
+#include "SkMorphologyImageFilter.h"
+#include "SkColorFilterImageFilter.h"
+#include "SkMergeImageFilter.h"
+#include "SkOffsetImageFilter.h"
+
+///////////////////////////////////////////////////////////////////////////////
+
+class ImageFiltersCropExpandGM : public skiagm::GM {
+public:
+ ImageFiltersCropExpandGM () {}
+
+protected:
+
+ virtual SkString onShortName() {
+ return SkString("imagefilterscropexpand");
+ }
+
+ virtual SkISize onISize() { return SkISize::Make(570, 650); }
+
+ void make_checkerboard(SkBitmap* bitmap) {
+ bitmap->allocN32Pixels(64, 64);
+ SkCanvas canvas(*bitmap);
+ canvas.clear(0xFFFF0000);
+ SkPaint darkPaint;
+ darkPaint.setColor(0xFF404040);
+ SkPaint lightPaint;
+ lightPaint.setColor(0xFFA0A0A0);
+ for (int y = 8; y < 48; y += 16) {
+ for (int x = 8; x < 48; x += 16) {
+ canvas.save();
+ canvas.translate(SkIntToScalar(x), SkIntToScalar(y));
+ canvas.drawRect(SkRect::MakeXYWH(0, 0, 8, 8), darkPaint);
+ canvas.drawRect(SkRect::MakeXYWH(8, 0, 8, 8), lightPaint);
+ canvas.drawRect(SkRect::MakeXYWH(0, 8, 8, 8), lightPaint);
+ canvas.drawRect(SkRect::MakeXYWH(8, 8, 8, 8), darkPaint);
+ canvas.restore();
+ }
+ }
+ }
+
+ void make_gradient_circle(int width, int height, SkBitmap* bitmap) {
+ SkScalar x = SkIntToScalar(width / 2);
+ SkScalar y = SkIntToScalar(height / 2);
+ SkScalar radius = SkMinScalar(x, y) * 0.8f;
+ bitmap->allocN32Pixels(width, height);
+ SkCanvas canvas(*bitmap);
+ canvas.clear(0x00000000);
+ SkColor colors[2];
+ colors[0] = SK_ColorWHITE;
+ colors[1] = SK_ColorBLACK;
+ SkAutoTUnref<SkShader> shader(
+ SkGradientShader::CreateRadial(SkPoint::Make(x, y), radius, colors, NULL, 2,
+ SkShader::kClamp_TileMode)
+ );
+ SkPaint paint;
+ paint.setShader(shader);
+ canvas.drawCircle(x, y, radius, paint);
+ }
+
+ static void draw(SkCanvas* canvas, const SkBitmap& bitmap, const SkRect& rect, SkImageFilter* filter) {
+ SkPaint paint;
+ paint.setImageFilter(filter)->unref();
+ canvas->saveLayer(&rect, &paint);
+ canvas->drawBitmap(bitmap, 0, 0);
+ canvas->restore();
+
+ SkPaint strokePaint;
+ strokePaint.setColor(0xFFFF0000);
+ strokePaint.setStyle(SkPaint::kStroke_Style);
+ canvas->drawRect(rect, strokePaint);
+
+ canvas->translate(SkIntToScalar(80), 0);
+ }
+
+ virtual void onDraw(SkCanvas* canvas) {
+ SkAutoTUnref<SkColorFilter> cf(
+ SkColorFilter::CreateModeFilter(SK_ColorBLUE, SkXfermode::kSrcIn_Mode));
+ SkImageFilter::CropRect crop_rect(
+ SkRect::Make(SkIRect::MakeXYWH(10, 10, 44, 44)),
+ SkImageFilter::CropRect::kHasAll_CropEdge);
+
+ SkBitmap gradient_circle, checkerboard;
+ make_gradient_circle(64, 64, &gradient_circle);
+ make_checkerboard(&checkerboard);
+
+ SkAutoTUnref<SkImageFilter> gradient_circle_source(
+ SkBitmapSource::Create(gradient_circle));
+ SkAutoTUnref<SkImageFilter> noop_cropped(
+ SkOffsetImageFilter::Create(0, 0, NULL, &crop_rect));
+ SkScalar sk255 = SkIntToScalar(255);
+ SkScalar matrix[20] = { 1, 0, 0, 0, 0,
+ 0, 1, 0, 0, sk255,
+ 0, 0, 1, 0, 0,
+ 0, 0, 0, 0, sk255 };
+ SkAutoTUnref<SkColorFilter> cf_alpha_trans(SkColorMatrixFilter::Create(matrix));
+
+ SkRect r = SkRect::MakeWH(SkIntToScalar(64), SkIntToScalar(64));
+ SkScalar MARGIN = SkIntToScalar(12);
+
+ SkIRect bounds;
+ r.roundOut(&bounds);
+
+ SkPaint paint;
+ canvas->translate(MARGIN, MARGIN);
+ for (int outset = -15; outset <= 20; outset += 5) {
+ canvas->save();
+ SkRect rect = crop_rect.rect();
+ rect.outset(SkIntToScalar(outset),
+ SkIntToScalar(outset));
+ SkImageFilter::CropRect big_rect(rect, SkImageFilter::CropRect::kHasAll_CropEdge);
+
+ draw(canvas, checkerboard, rect, SkColorFilterImageFilter::Create(
+ cf_alpha_trans, noop_cropped.get(), &big_rect));
+
+ draw(canvas, checkerboard, rect, SkBlurImageFilter::Create(
+ 8.0f, 8.0f, noop_cropped.get(), &big_rect));
+
+ draw(canvas, checkerboard, rect, SkDilateImageFilter::Create(
+ 2, 2, noop_cropped.get(), &big_rect));
+
+ draw(canvas, checkerboard, rect, SkErodeImageFilter::Create(
+ 2, 2, noop_cropped.get(), &big_rect));
+
+ draw(canvas, checkerboard, rect, SkDropShadowImageFilter::Create(
+ SkIntToScalar(10), SkIntToScalar(10), SkIntToScalar(3), SkIntToScalar(3),
+ SK_ColorBLUE, noop_cropped.get(), &big_rect));
+
+ draw(canvas, checkerboard, rect, SkDisplacementMapEffect::Create(
+ SkDisplacementMapEffect::kR_ChannelSelectorType,
+ SkDisplacementMapEffect::kR_ChannelSelectorType,
+ SkIntToScalar(12),
+ gradient_circle_source.get(),
+ noop_cropped.get(),
+ &big_rect));
+
+ draw(canvas, checkerboard, rect, SkOffsetImageFilter::Create(
+ SkIntToScalar(-8), SkIntToScalar(16), noop_cropped.get(), &big_rect));
+
+ canvas->restore();
+ canvas->translate(0, SkIntToScalar(80));
+ }
+ }
+
+private:
+ typedef GM INHERITED;
+};
+
+///////////////////////////////////////////////////////////////////////////////
+
+static skiagm::GM* MyFactory(void*) { return new ImageFiltersCropExpandGM; }
+static skiagm::GMRegistry reg(MyFactory);
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