1 files changed, 82 insertions, 0 deletions
diff --git a/test/renderer/pattern_atlas.test.cpp b/test/renderer/pattern_atlas.test.cpp
new file mode 100644
index 0000000000..2a19e463bd
--- /dev/null
+++ b/test/renderer/pattern_atlas.test.cpp
@@ -0,0 +1,82 @@
+#include <mbgl/test/util.hpp>
+#include <mbgl/test/fixture_log_observer.hpp>
+#include <mbgl/test/stub_style_observer.hpp>
+
+#include <mbgl/renderer/pattern_atlas.hpp>
+#include <mbgl/sprite/sprite_parser.hpp>
+#include <mbgl/style/image_impl.hpp>
+#include <mbgl/util/io.hpp>
+#include <mbgl/util/image.hpp>
+#include <mbgl/util/run_loop.hpp>
+#include <mbgl/util/string.hpp>
+
+#include <utility>
+
+using namespace mbgl;
+
+TEST(PatternAtlas, Basic) {
+    FixtureLog log;
+    PatternAtlas patternAtlas;
+
+    auto images = parseSprite(util::read_file("test/fixtures/annotations/emerald.png"),
+                              util::read_file("test/fixtures/annotations/emerald.json"));
+    for (auto& image : images) {
+        if (image->getID() == "metro") {
+            ASSERT_TRUE(patternAtlas.addPattern(*image->baseImpl));
+        }
+    }
+    auto found = patternAtlas.getPattern("metro");
+    ASSERT_TRUE(found);
+
+    auto metro = *found;
+    EXPECT_EQ(1, metro.tl()[0]);
+    EXPECT_EQ(1, metro.tl()[1]);
+    EXPECT_EQ(19, metro.br()[0]);
+    EXPECT_EQ(19, metro.br()[1]);
+    EXPECT_EQ(18, metro.displaySize()[0]);
+    EXPECT_EQ(18, metro.displaySize()[1]);
+    EXPECT_EQ(1.0f, metro.pixelRatio);
+    EXPECT_EQ(patternAtlas.getPixelSize(), patternAtlas.getAtlasImageForTests().size);
+
+    test::checkImage("test/fixtures/image_manager/basic", patternAtlas.getAtlasImageForTests());
+}
+
+TEST(PatternAtlas, Updates) {
+    PatternAtlas patternAtlas;
+
+    PremultipliedImage imageA({ 16, 12 });
+    imageA.fill(255);
+
+    auto added = patternAtlas.addPattern(*makeMutable<style::Image::Impl>("one", std::move(imageA), 1));
+    ASSERT_TRUE(added);
+    auto found = patternAtlas.getPattern("one");
+    ASSERT_TRUE(found);
+    EXPECT_EQ(added->textureRect, found->textureRect);
+
+    auto a = *found;
+    EXPECT_EQ(1, a.tl()[0]);
+    EXPECT_EQ(1, a.tl()[1]);
+    EXPECT_EQ(17, a.br()[0]);
+    EXPECT_EQ(13, a.br()[1]);
+    EXPECT_EQ(16, a.displaySize()[0]);
+    EXPECT_EQ(12, a.displaySize()[1]);
+    EXPECT_EQ(1.0f, a.pixelRatio);
+    test::checkImage("test/fixtures/image_manager/updates_before", patternAtlas.getAtlasImageForTests());
+
+    auto imageB = makeMutable<style::Image::Impl>("one", PremultipliedImage({ 5, 5 }), 1);
+    EXPECT_FALSE(patternAtlas.addPattern(*imageB)); // Already added.
+
+    patternAtlas.removePattern("one");
+    ASSERT_FALSE(patternAtlas.getPattern("one"));
+    EXPECT_TRUE(patternAtlas.addPattern(*imageB)); 
+
+    auto b = *patternAtlas.getPattern("one");
+    EXPECT_EQ(1, b.tl()[0]);
+    EXPECT_EQ(1, b.tl()[1]);
+    EXPECT_EQ(6, b.br()[0]);
+    EXPECT_EQ(6, b.br()[1]);
+    EXPECT_EQ(5, b.displaySize()[0]);
+    EXPECT_EQ(5, b.displaySize()[1]);
+    EXPECT_EQ(1.0f, b.pixelRatio);
+    test::checkImage("test/fixtures/image_manager/updates_after", patternAtlas.getAtlasImageForTests());
+}