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/*
* Copyright 2011 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 "SkPath.h"
static SkCanvas* MakeCanvas(const SkIRect& bounds) {
SkBitmap bm;
bm.setConfig(SkBitmap::kARGB_8888_Config, bounds.width(), bounds.height());
bm.allocPixels();
bm.eraseColor(0);
SkCanvas* canvas = new SkCanvas(bm);
canvas->translate(-SkIntToScalar(bounds.fLeft), -SkIntToScalar(bounds.fTop));
return canvas;
}
static void GetBitmap(const SkCanvas* canvas, SkBitmap* bm) {
*bm = canvas->getDevice()->accessBitmap(false);
}
static void compare_canvas(const SkCanvas* a, const SkCanvas* b) {
SkBitmap bma, bmb;
GetBitmap(a, &bma);
GetBitmap(b, &bmb);
SkASSERT(bma.width() == bmb.width());
SkASSERT(bma.height() == bmb.height());
bma.lockPixels();
bmb.lockPixels();
for (int y = 0; y < bma.height(); ++y) {
const SkPMColor* rowa = bma.getAddr32(0, y);
const SkPMColor* rowb = bmb.getAddr32(0, y);
SkASSERT(!memcmp(rowa, rowb, bma.width() << 2));
for (int x = 1; x < bma.width() - 1; ++x) {
SkASSERT(0xFF000000 == rowa[x]);
SkASSERT(0xFF000000 == rowb[x]);
}
}
}
static void drawRectAsPath(SkCanvas* canvas, const SkRect& r, const SkPaint& p) {
SkPath path;
path.addRect(r);
canvas->drawPath(path, p);
}
static void test_maskFromPath(const SkPath& path) {
SkIRect bounds;
path.getBounds().roundOut(&bounds);
SkPaint paint;
paint.setAntiAlias(true);
SkAutoTUnref<SkCanvas> path_canvas(MakeCanvas(bounds));
path_canvas->drawPath(path, paint);
SkAutoTUnref<SkCanvas> rect_canvas(MakeCanvas(bounds));
drawRectAsPath(rect_canvas, path.getBounds(), paint);
compare_canvas(path_canvas, rect_canvas);
}
static void test_mask() {
for (int i = 1; i <= 20; ++i) {
const SkScalar dx = SK_Scalar1 / i;
const SkRect constr = SkRect::MakeWH(dx, SkIntToScalar(2));
for (int n = 2; n < 20; ++n) {
SkPath path;
path.setFillType(SkPath::kEvenOdd_FillType);
SkRect r = constr;
while (r.fRight < SkIntToScalar(4)) {
path.addRect(r);
r.offset(dx, 0);
}
test_maskFromPath(path);
}
}
}
namespace skiagm {
/** Draw a 2px border around the target, then red behind the target;
set the clip to match the target, then draw >> the target in blue.
*/
static void draw (SkCanvas* canvas, SkRect& target, int x, int y) {
SkPaint borderPaint;
borderPaint.setColor(SkColorSetRGB(0x0, 0xDD, 0x0));
borderPaint.setAntiAlias(true);
SkPaint backgroundPaint;
backgroundPaint.setColor(SkColorSetRGB(0xDD, 0x0, 0x0));
backgroundPaint.setAntiAlias(true);
SkPaint foregroundPaint;
foregroundPaint.setColor(SkColorSetRGB(0x0, 0x0, 0xDD));
foregroundPaint.setAntiAlias(true);
canvas->save();
canvas->translate(SkIntToScalar(x), SkIntToScalar(y));
target.inset(SkIntToScalar(-2), SkIntToScalar(-2));
canvas->drawRect(target, borderPaint);
target.inset(SkIntToScalar(2), SkIntToScalar(2));
canvas->drawRect(target, backgroundPaint);
canvas->clipRect(target, SkRegion::kIntersect_Op, true);
target.inset(SkIntToScalar(-4), SkIntToScalar(-4));
canvas->drawRect(target, foregroundPaint);
canvas->restore();
}
static void draw_square (SkCanvas* canvas, int x, int y) {
SkRect target (SkRect::MakeWH(10 * SK_Scalar1, 10 * SK_Scalar1));
draw(canvas, target, x, y);
}
static void draw_column (SkCanvas* canvas, int x, int y) {
SkRect target (SkRect::MakeWH(1 * SK_Scalar1, 10 * SK_Scalar1));
draw(canvas, target, x, y);
}
static void draw_bar (SkCanvas* canvas, int x, int y) {
SkRect target (SkRect::MakeWH(10 * SK_Scalar1, 1 * SK_Scalar1));
draw(canvas, target, x, y);
}
static void draw_rect_tests (SkCanvas* canvas) {
draw_square(canvas, 10, 10);
draw_column(canvas, 30, 10);
draw_bar(canvas, 10, 30);
}
/**
Test a set of clipping problems discovered while writing blitAntiRect,
and test all the code paths through the clipping blitters.
Each region should show as a blue center surrounded by a 2px green
border, with no red.
*/
class AAClipGM : public GM {
public:
AAClipGM() {
}
protected:
virtual SkString onShortName() {
return SkString("aaclip");
}
virtual SkISize onISize() {
return make_isize(640, 480);
}
virtual void onDraw(SkCanvas* canvas) {
if (false) { // avoid bit rot, suppress warning
test_mask();
}
// Initial pixel-boundary-aligned draw
draw_rect_tests(canvas);
// Repeat 4x with .2, .4, .6, .8 px offsets
canvas->translate(SK_Scalar1 / 5, SK_Scalar1 / 5);
canvas->translate(SkIntToScalar(50), 0);
draw_rect_tests(canvas);
canvas->translate(SK_Scalar1 / 5, SK_Scalar1 / 5);
canvas->translate(SkIntToScalar(50), 0);
draw_rect_tests(canvas);
canvas->translate(SK_Scalar1 / 5, SK_Scalar1 / 5);
canvas->translate(SkIntToScalar(50), 0);
draw_rect_tests(canvas);
canvas->translate(SK_Scalar1 / 5, SK_Scalar1 / 5);
canvas->translate(SkIntToScalar(50), 0);
draw_rect_tests(canvas);
}
private:
typedef GM INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
static GM* MyFactory(void*) { return new AAClipGM; }
static GMRegistry reg(MyFactory);
}
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