1 files changed, 163 insertions, 0 deletions
diff --git a/source/Sprite.cpp b/source/Sprite.cpp
new file mode 100644
index 0000000..cb8d327
--- /dev/null
+++ b/source/Sprite.cpp
@@ -0,0 +1,163 @@
+#include "Sprite.hpp"
+
+#include "Image.hpp"
+#include "RapidJsonHelper.hpp"
+
+#include <rapidjson/document.h>
+#include <memory>
+
+using namespace std::literals;
+
+bool Sprite::IsValid() const {
+	return mAtlas != nullptr;
+}
+
+bool IresSpriteFiles::IsValid() const {
+	return !spriteFiles.empty();
+}
+
+Sprite* IresSpriteFiles::CreateInstance() const {
+	if (IsValid()) {
+		return nullptr;
+	}
+
+	std::vector<Texture::AtlasSource> sources;
+	sources.resize(spriteFiles.size());
+	for (auto& file : spriteFiles) {
+	}
+
+	Texture::AtlasOutput atlasOut;
+	Texture::AtlasInput atlasIn{
+		.sources = sources,
+		.packingMode = Texture::PM_KeepSquare,
+	};
+	atlasIn.sources = sources;
+	auto atlas = std::make_unique<Texture>();
+	if (atlas->InitAtlas(atlasIn, &atlasOut) != Texture::EC_Success) {
+		return nullptr;
+	}
+
+	auto sprite = std::make_unique<Sprite>();
+	sprite->mAtlas.Attach(atlas.release());
+	sprite->mBoundingBox = atlasOut.elements[0].subregionSize;
+	sprite->mFrames.reserve(atlasOut.elements.size());
+	for (auto& elm : atlasOut.elements) {
+		// Validate bounding box
+		if (sprite->mBoundingBox != elm.subregionSize) {
+			return nullptr;
+		}
+
+		// Copy frame subregion
+		sprite->mFrames.push_back(elm.subregion);
+	}
+	return sprite.release();
+}
+
+Sprite* IresSpriteFiles::GetInstance() {
+	if (mInstance == nullptr) {
+		mInstance.Attach(CreateInstance());
+	}
+	return mInstance.Get();
+}
+
+void IresSpriteFiles::InvalidateInstance() {
+	mInstance.Attach(nullptr);
+}
+
+void IresSpriteFiles::Write(rapidjson::Value& value, rapidjson::Document& root) const {
+	value.AddMember("Sprites", rapidjson::WriteVectorPrimitives(root, spriteFiles.begin(), spriteFiles.end()), root.GetAllocator());
+}
+
+void IresSpriteFiles::Read(const rapidjson::Value& value) {
+	auto rvFileList = rapidjson::GetProperty(value, rapidjson::kArrayType, "Sprites"sv);
+	if (!rvFileList) return;
+	spriteFiles.clear();
+	rapidjson::ReadVectorPrimitives<decltype(spriteFiles)>(*rvFileList, spriteFiles);
+}
+
+bool IresSpritesheet::IsValid() const {
+	return !spritesheetFile.empty() &&
+		sheetWSplit != 0 &&
+		sheetHSplit != 0;
+}
+
+void IresSpritesheet::ResplitSpritesheet(Sprite* sprite, int wSplit, int hSplit) {
+	auto atlas = sprite->GetAtlas();
+	auto size = atlas->GetInfo().size;
+	int frameWidth = size.x / wSplit;
+	int frameHeight = size.y / hSplit;
+
+	sprite->mBoundingBox = { frameWidth, frameHeight };
+	sprite->mFrames.clear();
+	sprite->mFrames.reserve(wSplit * hSplit);
+
+	// Width and height in UV coordinates for each frame
+	float deltaU = 1.0f / wSplit;
+	float deltaV = 1.0f / hSplit;
+	for (int y = 0; y < hSplit; ++y) {
+		for (int x = 0; x < wSplit; ++x) {
+			auto& subregion = sprite->mFrames.emplace_back();
+			// Top left
+			subregion.u0 = deltaU * x;
+			subregion.v0 = deltaV * y;
+			// Bottom right
+			subregion.u1 = subregion.u0 + deltaU;
+			subregion.u1 = subregion.v0 + deltaV;
+		}
+	}
+}
+
+Sprite* IresSpritesheet::CreateInstance() const {
+	if (!IsValid()) {
+		return nullptr;
+	}
+
+	auto atlas = std::make_unique<Texture>();
+	if (!atlas->InitFromFile(spritesheetFile.c_str())) {
+		return nullptr;
+	}
+
+	auto sprite = std::make_unique<Sprite>();
+	sprite->mAtlas.Attach(atlas.release());
+	ResplitSpritesheet(sprite.get(), sheetWSplit, sheetHSplit);
+	return sprite.release();
+}
+
+Sprite* IresSpritesheet::GetInstance() {
+	if (mInstance == nullptr) {
+		mInstance.Attach(CreateInstance());
+	}
+	return mInstance.Get();
+}
+
+void IresSpritesheet::InvalidateInstance() {
+	mInstance.Attach(nullptr);
+}
+
+void IresSpritesheet::Write(rapidjson::Value& value, rapidjson::Document& root) const {
+	value.AddMember("SpriteSheet", spritesheetFile, root.GetAllocator());
+	value.AddMember("WSplit", sheetWSplit, root.GetAllocator());
+	value.AddMember("HSplit", sheetHSplit, root.GetAllocator());
+}
+
+void IresSpritesheet::Read(const rapidjson::Value& value) {
+	BRUSSEL_JSON_GET(value, "SpriteSheet", std::string, spritesheetFile, return );
+	BRUSSEL_JSON_GET(value, "WSplit", int, sheetWSplit, return );
+	BRUSSEL_JSON_GET(value, "HSplit", int, sheetHSplit, return );
+}
+
+SpriteMesh::SpriteMesh(Sprite* sprite)
+	: mSprite(sprite) {
+}
+
+void SpriteMesh::SetFrame(int frame) {
+	// TODO
+}
+
+void SpriteMesh::PlayFrame() {
+	// TODO
+}
+
+void SpriteMesh::SetPlaybackSpeed(int speed) {
+	// TODO
+}