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skia2/tests/TileGridTest.cpp
mtklein 6bd41969a0 BBHs: void* data -> unsigned data 
Now that the old backend's not using BBHs, we can specialize them for
SkRecord's needs.  The only thing we really want to store is op index, which
should always be small enough to fit into an unsigned (unsigned also helps keep
it straight from other ints floating around).

This means we'll need half (32-bit) or a quarter (64-bit) the bytes in SkTileGrid,
because we don't have to store an extra int for ordering.

BUG=skia:2834

Review URL: https://codereview.chromium.org/617393004
2014-10-02 07:41:56 -07:00

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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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