69 lines
1.7 KiB
C++
69 lines
1.7 KiB
C++
#include "./sdlrenderer_texture_uploader.hpp"
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#include <cassert>
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#include <cstdint>
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#include <cstring>
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SDLRendererTextureUploader::SDLRendererTextureUploader(SDL_Renderer* renderer_) :
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renderer(renderer_)
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{
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}
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uint64_t SDLRendererTextureUploader::uploadRGBA(const uint8_t* data, uint32_t width, uint32_t height, Filter filter, Access access) {
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// TODO: test if pitch is 4 or 4*width
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SDL_Surface* surf = SDL_CreateSurfaceFrom(
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(void*)data,
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width, height,
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4*width,
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SDL_PIXELFORMAT_RGBA32 // auto big/little
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);
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assert(surf); // TODO: add error reporting
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// hacky hint usage
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if (access == Access::STREAMING) {
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SDL_SetHint("SDL_TextureAccess", "SDL_TEXTUREACCESS_STREAMING");
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} else {
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SDL_SetHint("SDL_TextureAccess", "SDL_TEXTUREACCESS_STATIC");
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}
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// TODO: cleanup hints after
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SDL_Texture* tex = SDL_CreateTextureFromSurface(renderer, surf);
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assert(tex); // TODO: add error reporting
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if (filter == NEAREST) {
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SDL_SetTextureScaleMode(tex, SDL_SCALEMODE_NEAREST);
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} else if (filter == LINEAR) {
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SDL_SetTextureScaleMode(tex, SDL_SCALEMODE_LINEAR);
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}
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SDL_DestroySurface(surf);
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return reinterpret_cast<uint64_t>(tex);
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}
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bool SDLRendererTextureUploader::updateRGBA(uint64_t tex_id, const uint8_t* data, size_t size) {
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auto* texture = static_cast<SDL_Texture*>(reinterpret_cast<void*>(tex_id));
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if (texture == nullptr) {
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return false;
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}
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uint8_t* pixels = nullptr;
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int pitch = 0;
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if (SDL_LockTexture(texture, nullptr, (void**)&pixels, &pitch) != 0) {
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// TODO: error
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return false;
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}
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std::memcpy(pixels, data, size);
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SDL_UnlockTexture(texture);
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return true;
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}
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void SDLRendererTextureUploader::destroy(uint64_t tex_id) {
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SDL_DestroyTexture(static_cast<SDL_Texture*>(reinterpret_cast<void*>(tex_id)));
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}
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