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Diffstat (limited to 'cc/layers/picture_layer_impl.cc')
| -rw-r--r-- | cc/layers/picture_layer_impl.cc | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/cc/layers/picture_layer_impl.cc b/cc/layers/picture_layer_impl.cc index 93d9bf1..695f539 100644 --- a/cc/layers/picture_layer_impl.cc +++ b/cc/layers/picture_layer_impl.cc @@ -52,6 +52,10 @@ const int kMinHeightForGpuRasteredTile = 256; // of using the same tile size. const int kTileRoundUp = 64; +// For performance reasons and to support compressed tile textures, tile +// width and height should be an even multiple of 4 in size. +const int kTileMinimalAlignment = 4; + } // namespace namespace cc { @@ -781,6 +785,10 @@ gfx::Size PictureLayerImpl::CalculateTileSize( tile_height = std::min(tile_height, default_tile_height); } + // Ensure that tile width and height are properly aligned. + tile_width = MathUtil::UncheckedRoundUp(tile_width, kTileMinimalAlignment); + tile_height = MathUtil::UncheckedRoundUp(tile_height, kTileMinimalAlignment); + // Under no circumstance should we be larger than the max texture size. tile_width = std::min(tile_width, max_texture_size); tile_height = std::min(tile_height, max_texture_size); |