Add XCUI new editor sandbox phase 1

tests/NewEditor/test_xcui_standalone_text_atlas_provider.cpp

@@ -0,0 +1,45 @@
+#include <gtest/gtest.h>
+
+#include "XCUIBackend/XCUIStandaloneTextAtlasProvider.h"
+
+#include <cstdint>
+
+namespace {
+
+using XCEngine::Editor::XCUIBackend::IXCUITextAtlasProvider;
+using XCEngine::Editor::XCUIBackend::XCUIStandaloneTextAtlasProvider;
+
+TEST(XCUIStandaloneTextAtlasProviderTest, BuildsDefaultEditorAtlasWithoutImGuiContext) {
+    XCUIStandaloneTextAtlasProvider provider = {};
+
+    IXCUITextAtlasProvider::AtlasTextureView atlasView = {};
+    ASSERT_TRUE(provider.IsReady());
+    ASSERT_TRUE(provider.GetAtlasTextureView(IXCUITextAtlasProvider::PixelFormat::RGBA32, atlasView));
+    EXPECT_TRUE(atlasView.IsValid());
+    EXPECT_EQ(atlasView.format, IXCUITextAtlasProvider::PixelFormat::RGBA32);
+    EXPECT_GT(provider.GetFontCount(), 0u);
+}
+
+TEST(XCUIStandaloneTextAtlasProviderTest, ExposesDefaultFontMetricsAndGlyphs) {
+    XCUIStandaloneTextAtlasProvider provider = {};
+    const IXCUITextAtlasProvider::FontHandle defaultFont = provider.GetDefaultFont();
+    ASSERT_TRUE(defaultFont.IsValid());
+
+    IXCUITextAtlasProvider::FontInfo fontInfo = {};
+    ASSERT_TRUE(provider.GetFontInfo(defaultFont, fontInfo));
+    EXPECT_GT(fontInfo.nominalSize, 0.0f);
+
+    IXCUITextAtlasProvider::BakedFontInfo bakedFontInfo = {};
+    ASSERT_TRUE(provider.GetBakedFontInfo(defaultFont, 0.0f, bakedFontInfo));
+    EXPECT_GT(bakedFontInfo.lineHeight, 0.0f);
+    EXPECT_GT(bakedFontInfo.rasterizerDensity, 0.0f);
+
+    IXCUITextAtlasProvider::GlyphInfo glyphInfo = {};
+    ASSERT_TRUE(provider.FindGlyph(defaultFont, 0.0f, static_cast<std::uint32_t>('A'), glyphInfo));
+    EXPECT_EQ(glyphInfo.requestedCodepoint, static_cast<std::uint32_t>('A'));
+    EXPECT_GT(glyphInfo.advanceX, 0.0f);
+    EXPECT_GE(glyphInfo.u1, glyphInfo.u0);
+    EXPECT_GE(glyphInfo.v1, glyphInfo.v0);
+}
+
+} // namespace