91 lines
3.0 KiB
C++
91 lines
3.0 KiB
C++
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#include <gtest/gtest.h>
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#include "XCUIBackend/ImGuiTextAtlasProvider.h"
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#include <imgui.h>
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#include <cstdint>
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namespace {
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using XCEngine::Editor::XCUIBackend::IXCUITextAtlasProvider;
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using XCEngine::Editor::XCUIBackend::ImGuiTextAtlasProvider;
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class ImGuiContextScope {
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public:
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ImGuiContextScope() {
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IMGUI_CHECKVERSION();
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ImGui::CreateContext();
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ImGui::StyleColorsDark();
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}
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~ImGuiContextScope() {
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ImGui::DestroyContext();
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}
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};
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void BuildDefaultFontAtlas() {
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ImGuiIO& io = ImGui::GetIO();
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if (io.Fonts->Fonts.empty()) {
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io.Fonts->AddFontDefault();
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}
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unsigned char* pixels = nullptr;
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int width = 0;
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int height = 0;
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io.Fonts->GetTexDataAsRGBA32(&pixels, &width, &height);
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}
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TEST(ImGuiTextAtlasProviderTest, ReturnsEmptyResultsWhenNoContextIsAvailable) {
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ImGuiTextAtlasProvider provider = {};
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IXCUITextAtlasProvider::AtlasTextureView atlasView = {};
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IXCUITextAtlasProvider::FontInfo fontInfo = {};
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IXCUITextAtlasProvider::BakedFontInfo bakedFontInfo = {};
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IXCUITextAtlasProvider::GlyphInfo glyphInfo = {};
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EXPECT_EQ(provider.GetContext(), nullptr);
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EXPECT_FALSE(provider.GetAtlasTextureView(IXCUITextAtlasProvider::PixelFormat::RGBA32, atlasView));
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EXPECT_EQ(provider.GetFontCount(), 0u);
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EXPECT_FALSE(provider.GetDefaultFont().IsValid());
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EXPECT_FALSE(provider.GetFontInfo({}, fontInfo));
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EXPECT_FALSE(provider.GetBakedFontInfo({}, 14.0f, bakedFontInfo));
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EXPECT_FALSE(provider.FindGlyph({}, 14.0f, 'A', glyphInfo));
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}
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TEST(ImGuiTextAtlasProviderTest, ExposesAtlasAndGlyphDataFromExplicitContext) {
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ImGuiContextScope contextScope;
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BuildDefaultFontAtlas();
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ImGuiTextAtlasProvider provider(ImGui::GetCurrentContext());
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IXCUITextAtlasProvider::AtlasTextureView atlasView = {};
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ASSERT_TRUE(provider.GetAtlasTextureView(IXCUITextAtlasProvider::PixelFormat::RGBA32, atlasView));
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EXPECT_TRUE(atlasView.IsValid());
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EXPECT_EQ(atlasView.format, IXCUITextAtlasProvider::PixelFormat::RGBA32);
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EXPECT_GT(atlasView.atlasStorageKey, 0u);
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EXPECT_GT(atlasView.pixelDataKey, 0u);
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const IXCUITextAtlasProvider::FontHandle defaultFont = provider.GetDefaultFont();
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ASSERT_TRUE(defaultFont.IsValid());
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ASSERT_GE(provider.GetFontCount(), 1u);
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IXCUITextAtlasProvider::FontInfo fontInfo = {};
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ASSERT_TRUE(provider.GetFontInfo(defaultFont, fontInfo));
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EXPECT_TRUE(fontInfo.handle.IsValid());
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EXPECT_GT(fontInfo.nominalSize, 0.0f);
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IXCUITextAtlasProvider::BakedFontInfo bakedFontInfo = {};
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ASSERT_TRUE(provider.GetBakedFontInfo(defaultFont, 0.0f, bakedFontInfo));
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EXPECT_GT(bakedFontInfo.lineHeight, 0.0f);
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EXPECT_GT(bakedFontInfo.rasterizerDensity, 0.0f);
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IXCUITextAtlasProvider::GlyphInfo glyphInfo = {};
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ASSERT_TRUE(provider.FindGlyph(defaultFont, 0.0f, 'A', glyphInfo));
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EXPECT_EQ(glyphInfo.requestedCodepoint, static_cast<std::uint32_t>('A'));
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EXPECT_GT(glyphInfo.advanceX, 0.0f);
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EXPECT_GE(glyphInfo.u1, glyphInfo.u0);
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EXPECT_GE(glyphInfo.v1, glyphInfo.v0);
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}
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} // namespace
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