ff26b7ea7c
BUG= Review URL: https://codereview.chromium.org/15873004 git-svn-id: http://skia.googlecode.com/svn/trunk@9259 2bbb7eff-a529-9590-31e7-b0007b416f81
265 lines
7.7 KiB
C++
265 lines
7.7 KiB
C++
/*
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* Copyright 2011 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "gm.h"
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#include "SkCanvas.h"
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#include "SkPath.h"
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#include "SkGradientShader.h"
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static void test_shallow_gradient(SkCanvas* canvas, SkScalar width, SkScalar height) {
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SkColor colors[] = { 0xFF7F7F7F, 0xFF7F7F7F, 0xFF000000 };
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SkScalar pos[] = { 0, 0.35f, SK_Scalar1 };
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SkPoint pts[] = { { 0, 0 }, { width, height } };
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SkShader* s = SkGradientShader::CreateLinear(pts, colors, pos,
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SK_ARRAY_COUNT(colors),
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SkShader::kClamp_TileMode);
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SkPaint paint;
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paint.setShader(s)->unref();
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canvas->drawPaint(paint);
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}
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#include "SkDashPathEffect.h"
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static void test_giant_dash(SkCanvas* canvas) {
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SkPaint paint;
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const SkScalar intervals[] = { SK_Scalar1, SK_Scalar1 };
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paint.setStrokeWidth(2);
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paint.setPathEffect(new SkDashPathEffect(intervals, 2, 0))->unref();
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SkScalar big = 500 * 1000;
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canvas->drawLine(10, 10, big, 10, paint);
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canvas->drawLine(-big, 20, 500, 20, paint);
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canvas->drawLine(-big, 30, big, 30, paint);
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const SkScalar intervals2[] = { 20, 5, 10, 5 };
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paint.setPathEffect(new SkDashPathEffect(intervals2, 4, 17))->unref();
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canvas->translate(0, 40);
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SkScalar x = -500;
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SkScalar width = 3173;
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for (int i = 0; i < 40; ++i) {
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if (i > 10)
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canvas->drawLine(x, 0, x + width, 0, paint);
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x += 1;
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canvas->translate(0, 4);
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}
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}
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// Reproduces bug found here: http://jsfiddle.net/R8Cu5/1/
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//
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#include "SkGradientShader.h"
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static void test_grad(SkCanvas* canvas) {
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SkPoint pts[] = {
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{ 478.544067f, -84.2041016f },
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{ 602.455933f, 625.204102f },
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};
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SkColor colors[] = { SK_ColorBLACK, SK_ColorBLACK, SK_ColorRED, SK_ColorRED };
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SkScalar pos[] = { 0, 0.3f, 0.3f, 1.0f };
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SkShader* s = SkGradientShader::CreateLinear(pts, colors, pos, 4, SkShader::kClamp_TileMode);
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SkPaint p;
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p.setShader(s)->unref();
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canvas->drawPaint(p);
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}
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static SkCanvas* MakeCanvas(const SkIRect& bounds) {
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SkBitmap bm;
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bm.setConfig(SkBitmap::kARGB_8888_Config, bounds.width(), bounds.height());
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bm.allocPixels();
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bm.eraseColor(SK_ColorTRANSPARENT);
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SkCanvas* canvas = new SkCanvas(bm);
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canvas->translate(-SkIntToScalar(bounds.fLeft), -SkIntToScalar(bounds.fTop));
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return canvas;
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}
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#ifdef SK_DEBUG
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static void GetBitmap(const SkCanvas* canvas, SkBitmap* bm) {
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*bm = canvas->getDevice()->accessBitmap(false);
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}
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#endif
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static void compare_canvas(const SkCanvas* a, const SkCanvas* b) {
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#ifdef SK_DEBUG
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SkBitmap bma, bmb;
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GetBitmap(a, &bma);
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GetBitmap(b, &bmb);
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SkASSERT(bma.width() == bmb.width());
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SkASSERT(bma.height() == bmb.height());
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bma.lockPixels();
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bmb.lockPixels();
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for (int y = 0; y < bma.height(); ++y) {
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const SkPMColor* rowa = bma.getAddr32(0, y);
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const SkPMColor* rowb = bmb.getAddr32(0, y);
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SkASSERT(!memcmp(rowa, rowb, bma.width() << 2));
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for (int x = 1; x < bma.width() - 1; ++x) {
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SkASSERT(0xFF000000 == rowa[x]);
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SkASSERT(0xFF000000 == rowb[x]);
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}
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}
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#endif
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}
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static void drawRectAsPath(SkCanvas* canvas, const SkRect& r, const SkPaint& p) {
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SkPath path;
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path.addRect(r);
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canvas->drawPath(path, p);
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}
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static void test_maskFromPath(const SkPath& path) {
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SkIRect bounds;
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path.getBounds().roundOut(&bounds);
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SkPaint paint;
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paint.setAntiAlias(true);
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SkAutoTUnref<SkCanvas> path_canvas(MakeCanvas(bounds));
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path_canvas->drawPath(path, paint);
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SkAutoTUnref<SkCanvas> rect_canvas(MakeCanvas(bounds));
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drawRectAsPath(rect_canvas, path.getBounds(), paint);
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compare_canvas(path_canvas, rect_canvas);
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}
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static void test_mask() {
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for (int i = 1; i <= 20; ++i) {
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const SkScalar dx = SK_Scalar1 / i;
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const SkRect constr = SkRect::MakeWH(dx, SkIntToScalar(2));
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for (int n = 2; n < 20; ++n) {
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SkPath path;
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path.setFillType(SkPath::kEvenOdd_FillType);
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SkRect r = constr;
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while (r.fRight < SkIntToScalar(4)) {
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path.addRect(r);
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r.offset(dx, 0);
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}
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test_maskFromPath(path);
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}
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}
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}
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/** Draw a 2px border around the target, then red behind the target;
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set the clip to match the target, then draw >> the target in blue.
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*/
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static void draw (SkCanvas* canvas, SkRect& target, int x, int y) {
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SkPaint borderPaint;
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borderPaint.setColor(SkColorSetRGB(0x0, 0xDD, 0x0));
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borderPaint.setAntiAlias(true);
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SkPaint backgroundPaint;
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backgroundPaint.setColor(SkColorSetRGB(0xDD, 0x0, 0x0));
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backgroundPaint.setAntiAlias(true);
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SkPaint foregroundPaint;
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foregroundPaint.setColor(SkColorSetRGB(0x0, 0x0, 0xDD));
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foregroundPaint.setAntiAlias(true);
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canvas->save();
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canvas->translate(SkIntToScalar(x), SkIntToScalar(y));
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target.inset(SkIntToScalar(-2), SkIntToScalar(-2));
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canvas->drawRect(target, borderPaint);
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target.inset(SkIntToScalar(2), SkIntToScalar(2));
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canvas->drawRect(target, backgroundPaint);
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canvas->clipRect(target, SkRegion::kIntersect_Op, true);
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target.inset(SkIntToScalar(-4), SkIntToScalar(-4));
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canvas->drawRect(target, foregroundPaint);
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canvas->restore();
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}
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static void draw_square (SkCanvas* canvas, int x, int y) {
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SkRect target (SkRect::MakeWH(10 * SK_Scalar1, 10 * SK_Scalar1));
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draw(canvas, target, x, y);
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}
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static void draw_column (SkCanvas* canvas, int x, int y) {
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SkRect target (SkRect::MakeWH(1 * SK_Scalar1, 10 * SK_Scalar1));
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draw(canvas, target, x, y);
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}
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static void draw_bar (SkCanvas* canvas, int x, int y) {
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SkRect target (SkRect::MakeWH(10 * SK_Scalar1, 1 * SK_Scalar1));
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draw(canvas, target, x, y);
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}
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static void draw_rect_tests (SkCanvas* canvas) {
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draw_square(canvas, 10, 10);
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draw_column(canvas, 30, 10);
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draw_bar(canvas, 10, 30);
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}
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/**
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Test a set of clipping problems discovered while writing blitAntiRect,
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and test all the code paths through the clipping blitters.
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Each region should show as a blue center surrounded by a 2px green
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border, with no red.
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*/
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class AAClipGM : public skiagm::GM {
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public:
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AAClipGM() {
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}
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protected:
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virtual SkString onShortName() SK_OVERRIDE {
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return SkString("aaclip");
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}
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virtual SkISize onISize() SK_OVERRIDE {
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return SkISize::Make(640, 480);
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}
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virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
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if (false) {
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SkRect bounds;
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canvas->getClipBounds(&bounds);
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test_shallow_gradient(canvas, bounds.width(), bounds.height()); return;
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}
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if (false) {
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test_giant_dash(canvas); return;
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}
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if (false) {
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test_grad(canvas); return;
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}
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if (false) { // avoid bit rot, suppress warning
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test_mask();
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}
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// Initial pixel-boundary-aligned draw
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draw_rect_tests(canvas);
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// Repeat 4x with .2, .4, .6, .8 px offsets
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canvas->translate(SK_Scalar1 / 5, SK_Scalar1 / 5);
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canvas->translate(SkIntToScalar(50), 0);
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draw_rect_tests(canvas);
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canvas->translate(SK_Scalar1 / 5, SK_Scalar1 / 5);
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canvas->translate(SkIntToScalar(50), 0);
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draw_rect_tests(canvas);
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canvas->translate(SK_Scalar1 / 5, SK_Scalar1 / 5);
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canvas->translate(SkIntToScalar(50), 0);
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draw_rect_tests(canvas);
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canvas->translate(SK_Scalar1 / 5, SK_Scalar1 / 5);
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canvas->translate(SkIntToScalar(50), 0);
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draw_rect_tests(canvas);
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}
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virtual uint32_t onGetFlags() const { return kSkipPipe_Flag; }
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private:
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typedef skiagm::GM INHERITED;
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};
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DEF_GM( return SkNEW(AAClipGM); )
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