Project structure update

src/assets/AssetsLoader.cpp

@@ -0,0 +1,92 @@
+#include "AssetsLoader.h"
+#include "Assets.h"
+
+#include <iostream>
+
+AssetsLoader::AssetsLoader(Assets* assets) : assets(assets) {
+}
+
+void AssetsLoader::addLoader(int tag, aloader_func func) {
+	loaders[tag] = func;
+}
+
+void AssetsLoader::add(int tag, const std::string filename, const std::string alias) {
+	entries.push(aloader_entry{ tag, filename, alias });
+}
+
+bool AssetsLoader::hasNext() const {
+	return !entries.empty();
+}
+
+bool AssetsLoader::loadNext() {
+	const aloader_entry& entry = entries.front();
+	std::cout << "    loading " << entry.filename << " as " << entry.alias << std::endl;
+	std::cout.flush();
+	auto found = loaders.find(entry.tag);
+	if (found == loaders.end()) {
+		std::cerr << "unknown asset tag " << entry.tag << std::endl;
+		return false;
+	}
+	aloader_func loader = found->second;
+	bool status = loader(assets, entry.filename, entry.alias);
+	entries.pop();
+	return status;
+}
+
+#include "../coders/png.h"
+#include "../graphics/Shader.h"
+#include "../graphics/Texture.h"
+#include "../graphics/Font.h"
+
+bool _load_shader(Assets* assets, const std::string& filename, const std::string& name) {
+	Shader* shader = load_shader(filename + ".glslv", filename + ".glslf");
+	if (shader == nullptr) {
+		std::cerr << "failed to load shader '" << name << "'" << std::endl;
+		return false;
+	}
+	assets->store(shader, name);
+	return true;
+}
+
+bool _load_texture(Assets* assets, const std::string& filename, const std::string& name) {
+	Texture* texture = png::load_texture(filename);
+	if (texture == nullptr) {
+		std::cerr << "failed to load texture '" << name << "'" << std::endl;
+		return false;
+	}
+	assets->store(texture, name);
+	return true;
+}
+
+bool _load_font(Assets* assets, const std::string& filename, const std::string& name) {
+	std::vector<Texture*> pages;
+	for (size_t i = 0; i <= 4; i++) {
+		Texture* texture = png::load_texture(filename + "_" + std::to_string(i) + ".png");
+		if (texture == nullptr) {
+			std::cerr << "failed to load bitmap font '" << name << "' (missing page " << std::to_string(i) << ")" << std::endl;
+			return false;
+		}
+		pages.push_back(texture);
+	}
+	Font* font = new Font(pages);
+	assets->store(font, name);
+	return true;
+}
+
+void AssetsLoader::createDefaults(AssetsLoader& loader) {
+	loader.addLoader(ASSET_SHADER, _load_shader);
+	loader.addLoader(ASSET_TEXTURE, _load_texture);
+	loader.addLoader(ASSET_FONT, _load_font);
+}
+
+void AssetsLoader::addDefaults(AssetsLoader& loader) {
+	loader.add(ASSET_SHADER, "res/main", "main");
+	loader.add(ASSET_SHADER, "res/crosshair", "crosshair");
+	loader.add(ASSET_SHADER, "res/lines", "lines");
+	loader.add(ASSET_SHADER, "res/ui", "ui");
+
+	loader.add(ASSET_TEXTURE, "res/block.png", "block");
+	loader.add(ASSET_TEXTURE, "res/slot.png", "slot");
+
+	loader.add(ASSET_FONT, "res/font", "normal");
+}