| /* |
| * Copyright 2017 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "gm/gm.h" |
| #include "include/core/SkBitmap.h" |
| #include "include/core/SkCanvas.h" |
| #include "include/core/SkColor.h" |
| #include "include/core/SkImage.h" |
| #include "include/core/SkRect.h" |
| #include "include/core/SkTypes.h" |
| #include "include/gpu/GrDirectContext.h" |
| #include "include/gpu/GrRecordingContext.h" |
| |
| // This test exercises Ganesh's drawing of tiled bitmaps. In particular, that the offsets and the |
| // extents of the tiles don't cause gaps between tiles. |
| static void draw_tile_bitmap_with_fractional_offset(SkCanvas* canvas, bool vertical) { |
| // This should match kBmpSmallTileSize in SkGpuDevice.cpp. Note that our canvas size is tuned |
| // to this constant as well. |
| const int kTileSize = 1 << 10; |
| |
| // We're going to draw a section of the bitmap that intersects 3 tiles (3x1 or 1x3). |
| // We need that to be < 50% of the total image, so our image is 7 tiles (7x1 or 1x7). |
| const int kBitmapLongEdge = 7 * kTileSize; |
| const int kBitmapShortEdge = 1 * kTileSize; |
| |
| if (auto dContext = GrAsDirectContext(canvas->recordingContext())) { |
| // To trigger tiling, we also need the image to be more than 50% of the cache, so we |
| // ensure the cache is sized to make that true. |
| const int kBitmapArea = kBitmapLongEdge * kBitmapShortEdge; |
| const size_t kBitmapBytes = kBitmapArea * sizeof(SkPMColor); |
| |
| const size_t newMaxResourceBytes = kBitmapBytes + (kBitmapBytes / 2); |
| dContext->setResourceCacheLimit(newMaxResourceBytes); |
| } |
| |
| // Construct our bitmap as either very wide or very tall |
| SkBitmap bmp; |
| bmp.allocN32Pixels(vertical ? kBitmapShortEdge : kBitmapLongEdge, |
| vertical ? kBitmapLongEdge : kBitmapShortEdge, true); |
| bmp.eraseColor(SK_ColorWHITE); |
| |
| // Draw ten strips with varying fractional offset to catch any rasterization issues with tiling |
| for (int i = 0; i < 10; ++i) { |
| float offset = i * 0.1f; |
| if (vertical) { |
| canvas->drawImageRect(bmp.asImage(), |
| SkRect::MakeXYWH(0, (kTileSize - 50) + offset, 32, 1124.0f), |
| SkRect::MakeXYWH(37.0f * i, 0.0f, 32.0f, 1124.0f), |
| SkSamplingOptions(), nullptr, |
| SkCanvas::kStrict_SrcRectConstraint); |
| } else { |
| canvas->drawImageRect(bmp.asImage(), |
| SkRect::MakeXYWH((kTileSize - 50) + offset, 0, 1124, 32), |
| SkRect::MakeXYWH(0.0f, 37.0f * i, 1124.0f, 32.0f), |
| SkSamplingOptions(), nullptr, |
| SkCanvas::kStrict_SrcRectConstraint); |
| } |
| } |
| } |
| |
| DEF_SIMPLE_GM_BG(bitmaptiled_fractional_horizontal, canvas, 1124, 365, SK_ColorBLACK) { |
| draw_tile_bitmap_with_fractional_offset(canvas, /* vertical= */ false); |
| } |
| |
| DEF_SIMPLE_GM_BG(bitmaptiled_fractional_vertical, canvas, 365, 1124, SK_ColorBLACK) { |
| draw_tile_bitmap_with_fractional_offset(canvas, /* vertical= */ true); |
| } |