#include <SDL2/SDL.h>#include <SDL2/SDL_image.h>#include <SDL2/SDL_mixer.h> #include "loader.h"#include "printsdlerror.h"#include "util.h" /*Copyright (c) 2013-2021 Devine Lu Linvega2018 web port by rezmason2021 C89 port by rezmason Permission to use, copy, modify, and distribute this software for anypurpose with or without fee is hereby granted, provided that the abovecopyright notice and this permission notice appear in all copies. THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIESWITH REGARD TO THIS SOFTWARE.*/ static SDL_Renderer *_renderer = NULL;static char *basePath = NULL;static SDL_Surface *missingSurface = NULL; Sound *createEmptySound(){	Sound *sound = (Sound *)malloc(sizeof(Sound));	sound->path = NULL;	sound->chunk = NULL;	sound->volume = 1;	return sound;} voiddrawSurfaceToImage(Image *image, SDL_Surface *surface){	SDL_Texture *texture = SDL_CreateTextureFromSurface(_renderer, surface);	if(texture == NULL) {		printSDLError("SDL could not create texture.");	} else {		SDL_SetTextureBlendMode(texture, SDL_BLENDMODE_BLEND);		image->w = surface->w;		image->h = surface->h;		image->texture = texture;	}} intloadImage(Image *image){	char *fullPath = concat(basePath, image->filePath);	SDL_Surface *loadedSurface = IMG_Load(fullPath);	if(loadedSurface == NULL) {		printSDLError("SDL could not load image %s.", fullPath);		drawSurfaceToImage(image, missingSurface);	} else {		drawSurfaceToImage(image, loadedSurface);		SDL_FreeSurface(loadedSurface);	} 	free(fullPath);	return image->texture != NULL;} intloadSound(Sound *sound){	char *fullPath = concat(basePath, sound->path);	SDL_RWops *file = SDL_RWFromFile(fullPath, "rb");	Mix_Chunk *chunk = Mix_LoadWAV_RW(file, 1);	if(chunk == NULL) {		printSDLError("SDL could not load chunk %s.", fullPath);	} else {		int volume = MIX_MAX_VOLUME * sound->volume;		sound->chunk = chunk;		if(volume < 0) {			volume = 0;		}		Mix_VolumeChunk(chunk, volume);	}	free(fullPath);	return sound->chunk != NULL;} voidLoader_Init(SDL_Renderer *renderer){	_renderer = renderer;	basePath = SDL_GetBasePath();	missingSurface = SDL_CreateRGBSurface(0, 1, 1, 32, 0, 0, 0, 0);#ifdef DEBUG	/* In debug builds, missing images appear magenta. */	SDL_FillRect(missingSurface, NULL, SDL_MapRGB(missingSurface->format, 0xFF, 0, 0xFF));#endif} voidLoader_Quit(){	_renderer = NULL;	free(basePath);	basePath = NULL;	SDL_FreeSurface(missingSurface);	missingSurface = NULL;} Image *Loader_CreateImage(Image **ptr, LoadType loadType, char *filePath){	Image *image = (Image *)malloc(sizeof(Image));	image->texture = NULL;	image->loadType = loadType;	image->filePath = filePath;	*ptr = image;	return image;} intLoader_LoadImage(Image *image){	if(image == NULL) {		return 1;	}	Loader_UnloadImage(image);	return loadImage(image);} voidLoader_UnloadImage(Image *image){	if(image == NULL) {		return;	}	if(image->texture != NULL) {		SDL_DestroyTexture(image->texture);		image->texture = NULL;	}} voidLoader_DestroyImage(Image *image){	if(image == NULL) {		return;	}	Loader_UnloadImage(image);	free(image);} Sound *Loader_CreateSound(Sound **ptr, char *path, float volume){	Sound *sound = createEmptySound();	sound->path = path;	sound->volume = volume;	*ptr = sound;	return sound;} intLoader_LoadSound(Sound *sound){	if(sound == NULL) {		return 1;	}	Loader_UnloadSound(sound);	return loadSound(sound);} voidLoader_UnloadSound(Sound *sound){	if(sound == NULL) {		return;	}	if(sound->chunk != NULL) {		Mix_FreeChunk(sound->chunk);		sound->chunk = NULL;	}} voidLoader_DestroySound(Sound *sound){	if(sound == NULL) {		return;	}	Loader_UnloadSound(sound);	free(sound);} intLoader_LoadText(char **ptr, char *path){	char *text = NULL;	char *fullPath = concat(basePath, path); 	SDL_RWops *file = SDL_RWFromFile(fullPath, "r"); 	if(file == NULL) {		printSDLError("SDL could not open text %s.", fullPath);	} else {		long fileSize = file->size(file);		text = calloc(fileSize + 1, 1); 		if(SDL_RWread(file, text, fileSize, 1) == 0) {			printSDLError("SDL could not read text %s.", fullPath);			free(text);			text = NULL;		} 		SDL_RWclose(file);	} 	free(fullPath);	*ptr = text;	return text != NULL;} intLoader_LoadCursor(SDL_Cursor **ptr, char *path){	SDL_Cursor *cursor = NULL;	char *fullPath = concat(basePath, path);	SDL_Surface *loadedSurface = IMG_Load(fullPath);	if(loadedSurface == NULL) {		printSDLError("SDL could not load image %s.", fullPath);	} else {		cursor = SDL_CreateColorCursor(loadedSurface, loadedSurface->w / 2, loadedSurface->h / 2);		if(cursor == NULL) {			printSDLError("SDL could not create a cursor from %s.", fullPath);		} 		SDL_FreeSurface(loadedSurface);	} 	free(fullPath);	*ptr = cursor;	return cursor != NULL;}