more setup

src/sdlrenderer_texture_uploader.cpp

@@ -0,0 +1,32 @@
+#include "./sdlrenderer_texture_uploader.hpp"
+
+#include <cassert>
+
+SDLRendererTextureUploader::SDLRendererTextureUploader(SDL_Renderer* renderer_) :
+	renderer(renderer_)
+{
+}
+
+uint64_t SDLRendererTextureUploader::uploadRGBA(const uint8_t* data, uint32_t width, uint32_t height) {
+	// TODO: test if pitch is 4 or 4*width
+	SDL_Surface* surf = SDL_CreateSurfaceFrom(
+		(void*)data,
+		width, height,
+		4*width,
+		//SDL_PIXELFORMAT_RGBA8888
+		SDL_PIXELFORMAT_ABGR8888 // little endian
+	);
+	assert(surf); // TODO: add error reporting
+
+	SDL_Texture* tex = SDL_CreateTextureFromSurface(renderer, surf);
+	assert(tex); // TODO: add error reporting
+
+	SDL_DestroySurface(surf);
+
+	return reinterpret_cast<uint64_t>(tex);
+}
+
+void SDLRendererTextureUploader::destroy(uint64_t tex_id) {
+	SDL_DestroyTexture(static_cast<SDL_Texture*>(reinterpret_cast<void*>(tex_id)));
+}
+