306 lines
8.7 KiB
C
306 lines
8.7 KiB
C
#include "asset_manager.h"
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#include <SDL3/SDL_render.h>
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#include <stdarg.h>
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#include <string.h>
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#include "memory_alloc.h"
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#include "linked_list.h"
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#include "display.h"
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#include "errors.h"
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asset_t *create_asset(asset_type_t asset_type)
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{
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asset_t *asset = malloc(sizeof(asset_t));
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if(!asset)
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{
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error_printf("Failed to allocate memory : %d", errno);
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return NULL;
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}
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asset->type = asset_type;
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asset->nb_refs = 0;
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return asset;
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}
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void destroy_asset(asset_t *asset)
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{
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free(asset->name);
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switch(asset->type)
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{
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case ASSET_TEXTURE:
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SDL_DestroyTexture(asset->data.texture);
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break;
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default:
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error_printf("Asset type not valid : %d", asset->type);
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break;
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}
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free(asset);
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}
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void destroy_asset_header_def(asset_header_def_t *asset_header_def)
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{
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free(asset_header_def->name);
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free(asset_header_def);
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}
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int asset_manager_init(asset_manager_t *asset_manager)
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{
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assert("Asset manager cannot be NULL" && asset_manager);
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linked_list_init(&asset_manager->assets, sizeof(asset_t), (deleter_t)destroy_asset);
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linked_list_init(&asset_manager->assets_header_defs, sizeof(asset_header_def_t), (deleter_t)destroy_asset_header_def);
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asset_manager->asset_file = fopen(ASSET_FILE_NAME, "rb");
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if(!asset_manager->asset_file)
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{
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error_printf("Failed to open asset file : %d", errno);
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return EXIT_FAILURE;
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}
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size_t nb_assets;
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size_t ret = fread(&nb_assets, sizeof(nb_assets), 1, asset_manager->asset_file);
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if(ret != 1)
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{
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error_printf("Failed to read asset file.");
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return EXIT_FAILURE;
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}
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for(size_t i = 0; i < nb_assets; i++)
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{
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elem_t *elem = elem_create(&asset_manager->assets_header_defs);
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if(!elem) return EXIT_FAILURE;
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size_t cap = 0;
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ret = getdelim(&((asset_header_def_t *)elem->data)->name, &cap, '\0', asset_manager->asset_file);
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if(ret == SIZE_MAX)
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{
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error_printf("Failed to read asset file.");
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return EXIT_FAILURE;
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}
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ret = fread(&((asset_header_def_t *)elem->data)->start, sizeof(((asset_header_def_t *)elem->data)->start), 1, asset_manager->asset_file);
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if(ret != 1)
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{
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error_printf("Failed to read asset file.");
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return EXIT_FAILURE;
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}
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linked_list_push_back_elem(&asset_manager->assets_header_defs, elem);
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}
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debug_printf("Initialized asset manager.");
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return EXIT_SUCCESS;
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}
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int asset_manager_exit(asset_manager_t *asset_manager)
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{
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assert("Asset manager cannot be NULL" && asset_manager);
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linked_list_clear(&asset_manager->assets_header_defs);
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linked_list_clear(&asset_manager->assets);
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if(fclose(asset_manager->asset_file))
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{
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error_printf("Failed to close asset file : %d", errno);
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return EXIT_FAILURE;
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}
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debug_printf("Exited asset manager.");
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return EXIT_SUCCESS;
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}
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// Only for this file
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// No args
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static inline bool condition_is_asset_unused(elem_t *elem, va_list args __attribute__((unused)))
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{
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return !((asset_t *)elem->data)->nb_refs;
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}
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inline void asset_manager_collect_garbage(asset_manager_t *asset_manager)
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{
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assert("Asset manager cannot be NULL" && asset_manager);
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linked_list_remove_if(&asset_manager->assets, condition_is_asset_unused);
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}
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// Only for this file
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// Arg : const char *asset_name
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static inline bool condition_is_asset_name(elem_t *elem, va_list args)
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{
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return !strcmp(((asset_t *)elem->data)->name, va_arg(args, const char *));
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}
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//Only for this file
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// Arg : const char *asset_name
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static inline bool condition_is_asset_header_def_name(elem_t *elem, va_list args)
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{
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return !strcmp(((asset_header_def_t *)elem->data)->name, va_arg(args, const char *));
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}
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static inline int load_texture(asset_manager_t *asset_manager, asset_t *asset, asset_header_def_t *asset_header_def)
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{
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if(fseek(asset_manager->asset_file, asset_header_def->start, SEEK_SET))
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{
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error_printf("Failed to seek in asset file : %d", errno);
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return EXIT_FAILURE;
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}
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size_t width, height;
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if(fread(&width, sizeof(width), 1, asset_manager->asset_file) != 1)
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{
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error_printf("Failed to read in asset file.");
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return EXIT_FAILURE;
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}
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if(fread(&height, sizeof(height), 1, asset_manager->asset_file) != 1)
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{
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error_printf("Failed to read in asset file.");
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return EXIT_FAILURE;
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}
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SDL_Surface *tmp_surface = SDL_CreateSurface(width, height, SDL_PIXELFORMAT_RGB565);
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if(!tmp_surface)
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{
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error_printf("Failed to create temporary surface : %s", SDL_GetError());
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return EXIT_FAILURE;
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}
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if(!SDL_LockSurface(tmp_surface))
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{
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error_printf("Failed to lock temporary surface : %s", SDL_GetError());
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SDL_DestroySurface(tmp_surface);
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return EXIT_FAILURE;
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}
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if(fread(tmp_surface->pixels, sizeof(uint16_t), width * height, asset_manager->asset_file) != width * height)
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{
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error_printf("Failed to read asset file.");
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SDL_DestroySurface(tmp_surface);
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return EXIT_FAILURE;
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}
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if(!SDL_SetSurfaceColorKey(tmp_surface, true, 0xF81F))
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{
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error_printf("Failed to set color key of temporary surface : %s", SDL_GetError());
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SDL_DestroySurface(tmp_surface);
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return EXIT_FAILURE;
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}
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asset->data.texture = SDL_CreateTextureFromSurface(renderer, tmp_surface);
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if(!asset->data.texture)
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{
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error_printf("Failed to create texture from temporary surface : %s", SDL_GetError());
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SDL_DestroySurface(tmp_surface);
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return EXIT_FAILURE;
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}
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SDL_DestroySurface(tmp_surface);
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return EXIT_SUCCESS;
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}
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int asset_manager_load_asset(asset_manager_t *asset_manager, const char *asset_name, asset_type_t asset_type)
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{
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assert("Asset manager cannot be NULL" && asset_manager);
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// Check if asset has alread been loaded.
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asset_t *asset = linked_list_get_if(&asset_manager->assets, condition_is_asset_name, asset_name);
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if(!asset)
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{
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// If it didn't, load it
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asset_header_def_t *asset_header_def = linked_list_get_if(&asset_manager->assets_header_defs, condition_is_asset_header_def_name, asset_name);
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if(!asset_header_def)
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{
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error_printf("Asset doesn't exist in asset file : %s", asset_name);
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return EXIT_FAILURE;
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}
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asset = create_asset(asset_type);
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if(!asset) return EXIT_FAILURE;
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asset->name = malloc(strlen(asset_name) + 1);
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if(!asset->name)
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{
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error_printf("Failed to allocate memory for asset name : %d", errno);
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destroy_asset(asset);
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return EXIT_FAILURE;
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}
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strcpy(asset->name, asset_name);
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asset->type = asset_type;
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switch(asset_type)
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{
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case ASSET_TEXTURE:
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if(load_texture(asset_manager, asset, asset_header_def)) return EXIT_FAILURE;
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break;
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default:
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error_printf("Asset type doesn't exists : %d", asset_type);
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destroy_asset(asset);
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return EXIT_FAILURE;
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}
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linked_list_push_back(&asset_manager->assets, asset);
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}
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asset->nb_refs++;
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debug_printf("Asset \"%s\" has been loaded, nb refs : %lu", asset->name, asset->nb_refs);
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return EXIT_SUCCESS;
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}
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int asset_manager_let_go_asset(asset_manager_t *asset_manager, const char *asset_name)
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{
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assert("Asset manager cannot be NULL" && asset_manager);
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asset_t *asset = linked_list_get_if(&asset_manager->assets, condition_is_asset_name, asset_name);
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if(!asset)
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{
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error_printf("Asset doesn't exists : %s", asset_name);
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}
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asset->nb_refs--;
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debug_printf("Asset \"%s\" has been let go, nb refs : %lu", asset->name, asset->nb_refs);
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return EXIT_SUCCESS;
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}
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texture_t *asset_manager_get_texture(asset_manager_t *asset_manager, const char *asset_name)
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{
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assert("Asset manager cannot be NULL" && asset_manager);
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asset_t *asset = linked_list_get_if(&asset_manager->assets, condition_is_asset_name, asset_name);
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if(!asset)
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{
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error_printf("Asset \"%s\" hasn't been loaded yet.", asset_name);
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return NULL;
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}
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if(asset->type != ASSET_TEXTURE)
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{
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error_printf("Asset \"%s\" isn't of type ASSET_TEXTURE.", asset_name);
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return NULL;
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}
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return asset->data.texture;
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}
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int asset_manager_draw_texture(texture_t *texture, rect_t *src_rect, rect_t *dst_rect, bool flip)
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{
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frect_t src_frect, dst_frect;
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rect_to_frect(src_rect, &src_frect);
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rect_to_frect(dst_rect, &dst_frect);
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if(!SDL_RenderTextureRotated(renderer, texture, &src_frect, &dst_frect, 0, NULL, flip))
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{
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error_printf("Failed to copy texture to renderer : %s", SDL_GetError());
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return EXIT_FAILURE;
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}
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return EXIT_SUCCESS;
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}
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