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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 "SkBitmapDevice.h"
#include "SkCanvas.h"
#include "SkCanvasStateUtils.h"
#include "SkDrawFilter.h"
#include "SkError.h"
#include "SkPaint.h"
#include "SkRRect.h"
#include "SkRect.h"
#include "Test.h"
static void test_complex_layers(skiatest::Reporter* reporter) {
const int WIDTH = 400;
const int HEIGHT = 400;
const int SPACER = 10;
SkRect rect = SkRect::MakeXYWH(SkIntToScalar(SPACER), SkIntToScalar(SPACER),
SkIntToScalar(WIDTH-(2*SPACER)),
SkIntToScalar((HEIGHT-(2*SPACER)) / 7));
const SkColorType colorTypes[] = {
kRGB_565_SkColorType, kPMColor_SkColorType
};
const int configCount = sizeof(colorTypes) / sizeof(SkBitmap::Config);
const int layerAlpha[] = { 255, 255, 0 };
const SkCanvas::SaveFlags flags[] = { SkCanvas::kARGB_NoClipLayer_SaveFlag,
SkCanvas::kARGB_ClipLayer_SaveFlag,
SkCanvas::kARGB_NoClipLayer_SaveFlag
};
REPORTER_ASSERT(reporter, sizeof(layerAlpha) == sizeof(flags));
const int layerCombinations = sizeof(layerAlpha) / sizeof(int);
for (int i = 0; i < configCount; ++i) {
SkBitmap bitmaps[2];
for (int j = 0; j < 2; ++j) {
bitmaps[j].allocPixels(SkImageInfo::Make(WIDTH, HEIGHT,
colorTypes[i],
kPremul_SkAlphaType));
SkCanvas canvas(bitmaps[j]);
canvas.drawColor(SK_ColorRED);
for (int k = 0; k < layerCombinations; ++k) {
// draw a rect within the layer's bounds and again outside the layer's bounds
canvas.saveLayerAlpha(&rect, layerAlpha[k], flags[k]);
SkCanvasState* state = NULL;
SkCanvas* tmpCanvas = NULL;
if (j) {
state = SkCanvasStateUtils::CaptureCanvasState(&canvas);
REPORTER_ASSERT(reporter, state);
tmpCanvas = SkCanvasStateUtils::CreateFromCanvasState(state);
REPORTER_ASSERT(reporter, tmpCanvas);
} else {
tmpCanvas = SkRef(&canvas);
}
SkPaint bluePaint;
bluePaint.setColor(SK_ColorBLUE);
bluePaint.setStyle(SkPaint::kFill_Style);
tmpCanvas->drawRect(rect, bluePaint);
tmpCanvas->translate(0, rect.height() + SPACER);
tmpCanvas->drawRect(rect, bluePaint);
tmpCanvas->unref();
SkCanvasStateUtils::ReleaseCanvasState(state);
canvas.restore();
// translate the canvas for the next iteration
canvas.translate(0, 2*(rect.height() + SPACER));
}
}
// now we memcmp the two bitmaps
REPORTER_ASSERT(reporter, bitmaps[0].getSize() == bitmaps[1].getSize());
REPORTER_ASSERT(reporter, !memcmp(bitmaps[0].getPixels(),
bitmaps[1].getPixels(),
bitmaps[0].getSize()));
}
}
////////////////////////////////////////////////////////////////////////////////
static void test_complex_clips(skiatest::Reporter* reporter) {
const int WIDTH = 400;
const int HEIGHT = 400;
const int SPACER = 10;
SkIRect layerRect = SkIRect::MakeWH(WIDTH, HEIGHT / 4);
layerRect.inset(2*SPACER, 2*SPACER);
SkIRect clipRect = layerRect;
clipRect.fRight = clipRect.fLeft + (clipRect.width() / 2) - (2*SPACER);
clipRect.outset(SPACER, SPACER);
SkIRect regionBounds = clipRect;
regionBounds.offset(clipRect.width() + (2*SPACER), 0);
SkIRect regionInterior = regionBounds;
regionInterior.inset(SPACER*3, SPACER*3);
SkRegion clipRegion;
clipRegion.setRect(regionBounds);
clipRegion.op(regionInterior, SkRegion::kDifference_Op);
const SkRegion::Op clipOps[] = { SkRegion::kIntersect_Op,
SkRegion::kIntersect_Op,
SkRegion::kReplace_Op,
};
const SkCanvas::SaveFlags flags[] = { SkCanvas::kARGB_NoClipLayer_SaveFlag,
SkCanvas::kARGB_ClipLayer_SaveFlag,
SkCanvas::kARGB_NoClipLayer_SaveFlag,
};
REPORTER_ASSERT(reporter, sizeof(clipOps) == sizeof(flags));
const int layerCombinations = sizeof(flags) / sizeof(SkCanvas::SaveFlags);
SkBitmap bitmaps[2];
for (int i = 0; i < 2; ++i) {
bitmaps[i].allocN32Pixels(WIDTH, HEIGHT);
SkCanvas canvas(bitmaps[i]);
canvas.drawColor(SK_ColorRED);
SkRegion localRegion = clipRegion;
for (int j = 0; j < layerCombinations; ++j) {
SkRect layerBounds = SkRect::Make(layerRect);
canvas.saveLayerAlpha(&layerBounds, 128, flags[j]);
SkCanvasState* state = NULL;
SkCanvas* tmpCanvas = NULL;
if (i) {
state = SkCanvasStateUtils::CaptureCanvasState(&canvas);
REPORTER_ASSERT(reporter, state);
tmpCanvas = SkCanvasStateUtils::CreateFromCanvasState(state);
REPORTER_ASSERT(reporter, tmpCanvas);
} else {
tmpCanvas = SkRef(&canvas);
}
tmpCanvas->save();
tmpCanvas->clipRect(SkRect::Make(clipRect), clipOps[j]);
tmpCanvas->drawColor(SK_ColorBLUE);
tmpCanvas->restore();
tmpCanvas->clipRegion(localRegion, clipOps[j]);
tmpCanvas->drawColor(SK_ColorBLUE);
tmpCanvas->unref();
SkCanvasStateUtils::ReleaseCanvasState(state);
canvas.restore();
// translate the canvas and region for the next iteration
canvas.translate(0, SkIntToScalar(2*(layerRect.height() + (SPACER))));
localRegion.translate(0, 2*(layerRect.height() + SPACER));
}
}
// now we memcmp the two bitmaps
REPORTER_ASSERT(reporter, bitmaps[0].getSize() == bitmaps[1].getSize());
REPORTER_ASSERT(reporter, !memcmp(bitmaps[0].getPixels(),
bitmaps[1].getPixels(),
bitmaps[0].getSize()));
}
////////////////////////////////////////////////////////////////////////////////
class TestDrawFilter : public SkDrawFilter {
public:
virtual bool filter(SkPaint*, Type) SK_OVERRIDE { return true; }
};
static void test_draw_filters(skiatest::Reporter* reporter) {
TestDrawFilter drawFilter;
SkBitmap bitmap;
bitmap.allocN32Pixels(10, 10);
SkCanvas canvas(bitmap);
canvas.setDrawFilter(&drawFilter);
SkCanvasState* state = SkCanvasStateUtils::CaptureCanvasState(&canvas);
REPORTER_ASSERT(reporter, state);
SkCanvas* tmpCanvas = SkCanvasStateUtils::CreateFromCanvasState(state);
REPORTER_ASSERT(reporter, tmpCanvas);
REPORTER_ASSERT(reporter, NULL != canvas.getDrawFilter());
REPORTER_ASSERT(reporter, NULL == tmpCanvas->getDrawFilter());
tmpCanvas->unref();
SkCanvasStateUtils::ReleaseCanvasState(state);
}
////////////////////////////////////////////////////////////////////////////////
// we need this function to prevent SkError from printing to stdout
static void error_callback(SkError code, void* ctx) {}
static void test_soft_clips(skiatest::Reporter* reporter) {
SkBitmap bitmap;
bitmap.allocN32Pixels(10, 10);
SkCanvas canvas(bitmap);
SkRRect roundRect;
roundRect.setOval(SkRect::MakeWH(5, 5));
canvas.clipRRect(roundRect, SkRegion::kIntersect_Op, true);
SkSetErrorCallback(error_callback, NULL);
SkCanvasState* state = SkCanvasStateUtils::CaptureCanvasState(&canvas);
REPORTER_ASSERT(reporter, !state);
REPORTER_ASSERT(reporter, kInvalidOperation_SkError == SkGetLastError());
SkClearLastError();
}
DEF_TEST(CanvasState, reporter) {
test_complex_layers(reporter);
test_complex_clips(reporter);
test_draw_filters(reporter);
test_soft_clips(reporter);
}
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