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/*
* Copyright 2012 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SkCanvas.h"
#include "SkPictureRecorder.h"
#include "SkTileGrid.h"
#include "Test.h"
enum Tile {
kTopLeft_Tile = 0x1,
kTopRight_Tile = 0x2,
kBottomLeft_Tile = 0x4,
kBottomRight_Tile = 0x8,
kAll_Tile = kTopLeft_Tile | kTopRight_Tile | kBottomLeft_Tile | kBottomRight_Tile,
};
class MockCanvas : public SkCanvas {
public:
MockCanvas(const SkBitmap& bm) : SkCanvas(bm) {}
virtual void drawRect(const SkRect& rect, const SkPaint&) {
// This capture occurs before quick reject.
fRects.push(rect);
}
SkTDArray<SkRect> fRects;
};
static void verify_tile_hits(skiatest::Reporter* reporter, SkRect rect,
uint32_t tileMask, int borderPixels = 0) {
SkTileGridFactory::TileGridInfo info;
info.fMargin.set(borderPixels, borderPixels);
info.fOffset.setZero();
info.fTileInterval.set(10 - 2 * borderPixels, 10 - 2 * borderPixels);
SkTileGrid grid(2, 2, info);
grid.insert(0, rect, false);
REPORTER_ASSERT(reporter, grid.tileCount(0, 0) ==
((tileMask & kTopLeft_Tile)? 1 : 0));
REPORTER_ASSERT(reporter, grid.tileCount(1, 0) ==
((tileMask & kTopRight_Tile)? 1 : 0));
REPORTER_ASSERT(reporter, grid.tileCount(0, 1) ==
((tileMask & kBottomLeft_Tile)? 1 : 0));
REPORTER_ASSERT(reporter, grid.tileCount(1, 1) ==
((tileMask & kBottomRight_Tile)? 1 : 0));
}
DEF_TEST(TileGrid_UnalignedQuery, reporter) {
// Use SkTileGridPicture to generate a SkTileGrid with a helper
SkTileGridFactory::TileGridInfo info;
info.fMargin.setEmpty();
info.fOffset.setZero();
info.fTileInterval.set(10, 10);
SkRect rect1 = SkRect::MakeXYWH(SkIntToScalar(0), SkIntToScalar(0),
SkIntToScalar(8), SkIntToScalar(8));
SkRect rect2 = SkRect::MakeXYWH(SkIntToScalar(11), SkIntToScalar(11),
SkIntToScalar(1), SkIntToScalar(1));
SkTileGridFactory factory(info);
SkPictureRecorder recorder;
SkCanvas* canvas = recorder.beginRecording(20, 20, &factory, 0);
SkPaint paint;
canvas->drawRect(rect1, paint);
canvas->drawRect(rect2, paint);
SkAutoTUnref<SkPicture> picture(recorder.endRecording());
SkBitmap store;
store.allocN32Pixels(1, 1);
// Test parts of top-left tile
{
MockCanvas mockCanvas(store);
picture->playback(&mockCanvas);
REPORTER_ASSERT(reporter, 1 == mockCanvas.fRects.count());
REPORTER_ASSERT(reporter, rect1 == mockCanvas.fRects[0]);
}
{
MockCanvas mockCanvas(store);
mockCanvas.translate(-7.99f, -7.99f);
picture->playback(&mockCanvas);
REPORTER_ASSERT(reporter, 1 == mockCanvas.fRects.count());
REPORTER_ASSERT(reporter, rect1 == mockCanvas.fRects[0]);
}
// Corner overlap
{
MockCanvas mockCanvas(store);
mockCanvas.translate(-9.5f, -9.5f);
picture->playback(&mockCanvas);
REPORTER_ASSERT(reporter, 2 == mockCanvas.fRects.count());
REPORTER_ASSERT(reporter, rect1 == mockCanvas.fRects[0]);
REPORTER_ASSERT(reporter, rect2 == mockCanvas.fRects[1]);
}
// Intersect bottom right tile, but does not overlap rect 2
{
MockCanvas mockCanvas(store);
mockCanvas.translate(-16.0f, -16.0f);
picture->playback(&mockCanvas);
REPORTER_ASSERT(reporter, 1 == mockCanvas.fRects.count());
REPORTER_ASSERT(reporter, rect2 == mockCanvas.fRects[0]);
}
// Out of bounds queries, snap to border tiles
{
MockCanvas mockCanvas(store);
mockCanvas.translate(2.0f, 0.0f);
picture->playback(&mockCanvas);
REPORTER_ASSERT(reporter, 1 == mockCanvas.fRects.count());
REPORTER_ASSERT(reporter, rect1 == mockCanvas.fRects[0]);
}
{
MockCanvas mockCanvas(store);
mockCanvas.translate(0.0f, 2.0f);
picture->playback(&mockCanvas);
REPORTER_ASSERT(reporter, 1 == mockCanvas.fRects.count());
REPORTER_ASSERT(reporter, rect1 == mockCanvas.fRects[0]);
}
{
MockCanvas mockCanvas(store);
mockCanvas.translate(-22.0f, -16.0f);
picture->playback(&mockCanvas);
REPORTER_ASSERT(reporter, 1 == mockCanvas.fRects.count());
REPORTER_ASSERT(reporter, rect2 == mockCanvas.fRects[0]);
}
{
MockCanvas mockCanvas(store);
mockCanvas.translate(-16.0f, -22.0f);
picture->playback(&mockCanvas);
REPORTER_ASSERT(reporter, 1 == mockCanvas.fRects.count());
REPORTER_ASSERT(reporter, rect2 == mockCanvas.fRects[0]);
}
}
DEF_TEST(TileGrid_OverlapOffsetQueryAlignment, reporter) {
// Use SkTileGridPicture to generate a SkTileGrid with a helper
SkTileGridFactory::TileGridInfo info;
info.fMargin.set(1, 1);
info.fOffset.set(-1, -1);
info.fTileInterval.set(8, 8);
// rect landing entirely in top left tile
SkRect rect1 = SkRect::MakeXYWH(SkIntToScalar(0), SkIntToScalar(0),
SkIntToScalar(1), SkIntToScalar(1));
// rect landing entirely in center tile
SkRect rect2 = SkRect::MakeXYWH(SkIntToScalar(12), SkIntToScalar(12),
SkIntToScalar(1), SkIntToScalar(1));
// rect landing entirely in bottomright tile
SkRect rect3 = SkRect::MakeXYWH(SkIntToScalar(19), SkIntToScalar(19),
SkIntToScalar(1), SkIntToScalar(1));
SkTileGridFactory factory(info);
SkPictureRecorder recorder;
SkCanvas* canvas = recorder.beginRecording(20, 20, &factory, 0);
SkPaint paint;
canvas->drawRect(rect1, paint);
canvas->drawRect(rect2, paint);
canvas->drawRect(rect3, paint);
SkAutoTUnref<SkPicture> picture(recorder.endRecording());
SkBitmap tileBitmap;
tileBitmap.allocN32Pixels(10, 10);
SkBitmap moreThanATileBitmap;
moreThanATileBitmap.allocN32Pixels(11, 11);
SkBitmap tinyBitmap;
tinyBitmap.allocN32Pixels(2, 2);
// Test parts of top-left tile
{
// The offset should cancel the top and left borders of the top left tile
// So a look-up at interval 0-10 should be grid aligned,
MockCanvas mockCanvas(tileBitmap);
picture->playback(&mockCanvas);
REPORTER_ASSERT(reporter, 1 == mockCanvas.fRects.count());
REPORTER_ASSERT(reporter, rect1 == mockCanvas.fRects[0]);
}
{
// Encroaching border by one pixel
MockCanvas mockCanvas(moreThanATileBitmap);
picture->playback(&mockCanvas);
REPORTER_ASSERT(reporter, 2 == mockCanvas.fRects.count());
REPORTER_ASSERT(reporter, rect1 == mockCanvas.fRects[0]);
REPORTER_ASSERT(reporter, rect2 == mockCanvas.fRects[1]);
}
{
// Tile stride is 8 (tileWidth - 2 * border pixels
// so translating by 8, should make query grid-aligned
// with middle tile.
MockCanvas mockCanvas(tileBitmap);
mockCanvas.translate(SkIntToScalar(-8), SkIntToScalar(-8));
picture->playback(&mockCanvas);
REPORTER_ASSERT(reporter, 1 == mockCanvas.fRects.count());
REPORTER_ASSERT(reporter, rect2 == mockCanvas.fRects[0]);
}
{
MockCanvas mockCanvas(tileBitmap);
mockCanvas.translate(-7.9f, -7.9f);
picture->playback(&mockCanvas);
REPORTER_ASSERT(reporter, 2 == mockCanvas.fRects.count());
REPORTER_ASSERT(reporter, rect1 == mockCanvas.fRects[0]);
REPORTER_ASSERT(reporter, rect2 == mockCanvas.fRects[1]);
}
{
MockCanvas mockCanvas(tileBitmap);
mockCanvas.translate(-8.1f, -8.1f);
picture->playback(&mockCanvas);
REPORTER_ASSERT(reporter, 2 == mockCanvas.fRects.count());
REPORTER_ASSERT(reporter, rect2 == mockCanvas.fRects[0]);
REPORTER_ASSERT(reporter, rect3 == mockCanvas.fRects[1]);
}
{
// Regression test for crbug.com/234688
// Once the 2x2 device region is inset by margin, it yields an empty
// adjusted region, sitting right on top of the tile boundary.
MockCanvas mockCanvas(tinyBitmap);
mockCanvas.translate(-8.0f, -8.0f);
picture->playback(&mockCanvas);
// This test passes by not asserting. We do not validate the rects recorded
// because the result is numerically unstable (floating point equality).
// The content of any one of the four tiles of the tilegrid would be a valid
// result since any bbox that covers the center point of the canvas will be
// recorded in all four tiles.
}
}
DEF_TEST(TileGrid, reporter) {
// Out of bounds
verify_tile_hits(reporter, SkRect::MakeXYWH(30, 0, 1, 1), 0);
verify_tile_hits(reporter, SkRect::MakeXYWH(0, 30, 1, 1), 0);
verify_tile_hits(reporter, SkRect::MakeXYWH(-10, 0, 1, 1), 0);
verify_tile_hits(reporter, SkRect::MakeXYWH(0, -10, 1, 1), 0);
// Dilation for AA consideration
verify_tile_hits(reporter, SkRect::MakeXYWH(0, 0, 9, 9), kTopLeft_Tile);
verify_tile_hits(reporter, SkRect::MakeXYWH(0, 0, 10, 10), kAll_Tile);
verify_tile_hits(reporter, SkRect::MakeXYWH(9, 9, 1, 1), kAll_Tile);
verify_tile_hits(reporter, SkRect::MakeXYWH(10, 10, 1, 1), kAll_Tile);
verify_tile_hits(reporter, SkRect::MakeXYWH(11, 11, 1, 1), kBottomRight_Tile);
// BorderPixels
verify_tile_hits(reporter, SkRect::MakeXYWH(0, 0, 6, 6), kTopLeft_Tile, 1);
verify_tile_hits(reporter, SkRect::MakeXYWH(0, 0, 7, 7), kAll_Tile, 1);
verify_tile_hits(reporter, SkRect::MakeXYWH(9, 9, 1, 1), kAll_Tile, 1);
verify_tile_hits(reporter, SkRect::MakeXYWH(10, 10, 1, 1), kBottomRight_Tile, 1);
verify_tile_hits(reporter, SkRect::MakeXYWH(17, 17, 1, 1), kBottomRight_Tile, 1);
// BBoxes that overlap tiles
verify_tile_hits(reporter, SkRect::MakeXYWH(5, 5, 10, 1), kTopLeft_Tile | kTopRight_Tile);
verify_tile_hits(reporter, SkRect::MakeXYWH(5, 5, 1, 10), kTopLeft_Tile | kBottomLeft_Tile);
verify_tile_hits(reporter, SkRect::MakeXYWH(5, 5, 10, 10), kAll_Tile);
verify_tile_hits(reporter, SkRect::MakeXYWH(-10, -10, 40, 40),kAll_Tile);
}
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