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[core] Make Image safer

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Provide Image::copy, which handles copying rectangles from a source to a destination, with thorough bounds checking.

Also fixes an indexing error in SpriteAtlas, where the top row of pixels in a wrapped image was copied from the wrong source row.
This commit is contained in:
John Firebaugh
2017-02-10 17:18:18 -08:00
parent c6d5eaf479
commit 94f011895c
15 changed files with 163 additions and 116 deletions
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8
test/text/glyph_pbf.test.cpp
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@@ -44,15 +44,17 @@ TEST(GlyphPBF, Parsing) {
glyphAtlasObserver.glyphsLoaded = [&](const FontStack&, const GlyphRange&) {
loop.stop();
auto sdfs = glyphAtlas.getGlyphSet(fontStack)->getSDFs();
const auto& sdfs = glyphAtlas.getGlyphSet(fontStack)->getSDFs();
// The fake glyphs don't contain a glyph that has the ID 0; it only contains glyphs with
// undefined IDs, but the parser should remove them.
EXPECT_TRUE(sdfs.size() == 1);
EXPECT_TRUE(sdfs.find(69) != sdfs.end());
auto& sdf = sdfs[69];
EXPECT_EQ("xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"s, sdf.bitmap);
auto& sdf = sdfs.at(69);
AlphaImage expected({7, 7});
expected.fill('x');
EXPECT_EQ(expected, sdf.bitmap);
EXPECT_EQ(1u, sdf.metrics.width);
EXPECT_EQ(1u, sdf.metrics.height);
EXPECT_EQ(20, sdf.metrics.left);