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add sdl bmp image loader

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Green Sky
2023-07-30 16:00:55 +02:00
parent 42b3866753
commit c0b57c30bd
5 changed files with 102 additions and 11 deletions
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53
src/image_loader_sdl_bmp.cpp Normal file
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#include "./image_loader_sdl_bmp.hpp"
#include <SDL3/SDL.h>
ImageLoaderSDLBMP::ImageInfo ImageLoaderSDLBMP::loadInfoFromMemory(const uint8_t* data, uint64_t data_size) {
ImageInfo res;
auto* rw_ctx = SDL_RWFromConstMem(data, data_size);
SDL_Surface* surf = SDL_LoadBMP_RW(rw_ctx, SDL_TRUE);
if (surf == nullptr) {
return res;
}
res.width = surf->w;
res.height = surf->h;
SDL_DestroySurface(surf);
return res;
}
ImageLoaderSDLBMP::ImageResult ImageLoaderSDLBMP::loadFromMemoryRGBA(const uint8_t* data, uint64_t data_size) {
ImageResult res;
auto* rw_ctx = SDL_RWFromConstMem(data, data_size);
SDL_Surface* surf = SDL_LoadBMP_RW(rw_ctx, SDL_TRUE);
if (surf == nullptr) {
return res;
}
SDL_Surface* conv_surf = SDL_ConvertSurfaceFormat(surf, SDL_PIXELFORMAT_RGBA32);
SDL_DestroySurface(surf);
if (conv_surf == nullptr) {
return res;
}
res.width = surf->w;
res.height = surf->h;
SDL_LockSurface(conv_surf);
auto& new_frame = res.frames.emplace_back();
new_frame.ms = 0;
new_frame.data.insert(new_frame.data.cbegin(), (const uint8_t*)conv_surf->pixels, ((const uint8_t*)conv_surf->pixels) + (surf->w*surf->h*4));
SDL_UnlockSurface(conv_surf);
SDL_DestroySurface(conv_surf);
return res;
}