tomato/src/sdlrenderer_texture_uploader.cpp

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