forked from Green-Sky/tomato
80 lines
1.8 KiB
C++
80 lines
1.8 KiB
C++
#include "./image_loader_sdl_bmp.hpp"
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#include <SDL3/SDL.h>
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#include <iostream>
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#include <cassert>
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ImageLoaderSDLBMP::ImageInfo ImageLoaderSDLBMP::loadInfoFromMemory(const uint8_t* data, uint64_t data_size) {
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ImageInfo res;
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auto* ios = SDL_IOFromConstMem(data, data_size);
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SDL_Surface* surf = SDL_LoadBMP_IO(ios, SDL_TRUE);
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if (surf == nullptr) {
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return res;
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}
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assert(surf->w >= 0);
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assert(surf->h >= 0);
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res.width = surf->w;
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res.height = surf->h;
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res.file_ext = "bmp";
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SDL_DestroySurface(surf);
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return res;
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}
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ImageLoaderSDLBMP::ImageResult ImageLoaderSDLBMP::loadFromMemoryRGBA(const uint8_t* data, uint64_t data_size) {
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auto* ios = SDL_IOFromConstMem(data, data_size);
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SDL_Surface* surf = SDL_LoadBMP_IO(ios, SDL_TRUE);
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if (surf == nullptr) {
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return {};
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}
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SDL_Surface* conv_surf = SDL_ConvertSurface(surf, SDL_PIXELFORMAT_RGBA32);
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SDL_DestroySurface(surf);
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if (conv_surf == nullptr) {
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return {};
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}
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assert(conv_surf->w >= 0);
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assert(conv_surf->h >= 0);
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if (conv_surf->w > 16*1024 || conv_surf->h > 10*1024) {
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std::cerr << "IL_SDLBMP error: image too large\n";
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return {};
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}
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ImageResult res;
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if (SDL_MUSTLOCK(conv_surf)) {
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if (!SDL_LockSurface(conv_surf)) {
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std::cerr << "IL_SDLBMP error: " << SDL_GetError() << "\n";
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SDL_DestroySurface(conv_surf);
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return {};
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}
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}
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res.width = conv_surf->w;
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res.height = conv_surf->h;
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res.file_ext = "bmp";
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auto& new_frame = res.frames.emplace_back();
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new_frame.ms = 0;
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new_frame.data = {(const uint8_t*)conv_surf->pixels, ((const uint8_t*)conv_surf->pixels) + (conv_surf->w*conv_surf->h*4)};
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if (SDL_MUSTLOCK(conv_surf)) {
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SDL_UnlockSurface(conv_surf);
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}
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SDL_DestroySurface(conv_surf);
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std::cout << "IL_SDLBMP: loaded img " << res.width << "x" << res.height << "\n";
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return res;
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}
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