archeus/packages/graphics/sdl/spritesheet.c

#include "arc/graphics/spritesheet.h"

#include "spritesheet.h"
#include "renderer.h"
#include "arc/math/point.h"
#include "arc/std/errno.h"
#include <SDL.h>
#include <SDL_image.h>
#include <stdlib.h>

void ARC_Spritesheet_CreateFromFile(ARC_Spritesheet **spritesheet, ARC_Renderer *renderer, ARC_String *path){
    //TODO: allow other types of images
    //init image as a png
    IMG_Init(IMG_INIT_PNG);

    //get and check the SDL surface
    SDL_Surface *surface = IMG_Load(path->data);
    if(!surface){
        arc_errno = ARC_ERRNO_DATA;
        ARC_DEBUG_LOG_ERROR_WITH_VARIABLES("ARC_Spritesheet_CreateFromFile(spritesheet, renderer, path), could not read path \"%s\", SDL2_Image Error: %s", path->data, IMG_GetError());

        //cleanup
        IMG_Quit();

        //set the spritesheet to null and throw an error
        *spritesheet = NULL;
        return;
    }

    //create the place to store the spritesheet
    *spritesheet = (ARC_Spritesheet *)malloc(sizeof(ARC_Spritesheet));

    //set the texture
    SDL_BlendMode tempMode;
    SDL_GetSurfaceBlendMode(surface, &tempMode);
    (*spritesheet)->texture = SDL_CreateTextureFromSurface((SDL_Renderer *)renderer, surface);
    SDL_SetTextureBlendMode((*spritesheet)->texture, tempMode);

    //set the tile size to empty
    (*spritesheet)->size = 0;

    //cleanup
    SDL_FreeSurface(surface);
    IMG_Quit();
}

void ARC_Spritesheet_Destroy(ARC_Spritesheet *spritesheet){
    SDL_DestroyTexture(spritesheet->texture);
    free(spritesheet);
}

void ARC_Spritesheet_RenderArea(ARC_Spritesheet *spritesheet, ARC_Rect sheetBounds, ARC_Renderer *renderer, ARC_Rect renderBounds){
    SDL_RenderCopy((SDL_Renderer *)renderer, spritesheet->texture, (SDL_Rect *)&sheetBounds, (SDL_Rect *)&renderBounds);
}

void ARC_Spritesheet_RenderTile(ARC_Spritesheet *spritesheet, ARC_Point tilePosition, ARC_Renderer *renderer, ARC_Rect renderBounds){
    //error when size is 0
    if(spritesheet->size == 0){
        arc_errno = ARC_ERRNO_NULL;
        ARC_DEBUG_LOG_ERROR("ARC_Spritesheet_RenderTile(spritesheet, tilePosition, renderer, renderBounds), could not render a tile of size 0");
        return;
    }

    //get bounds based on the sheet size
    ARC_Rect sheetBounds = {
        spritesheet->size * tilePosition.x,
        spritesheet->size * tilePosition.y,
        spritesheet->size,
        spritesheet->size
    };

    //render the bounds
    SDL_RenderCopy((SDL_Renderer *)renderer, spritesheet->texture, (SDL_Rect *)&sheetBounds, (SDL_Rect *)&renderBounds);
}

ARC_Point ARC_Spritesheet_GetSize(ARC_Spritesheet *spritesheet){
    ARC_Point size;
    SDL_QueryTexture(spritesheet->texture, NULL, NULL, &size.x, &size.y);
    return size;
}

uint32_t ARC_Spritesheet_GetTileSize(ARC_Spritesheet *spritesheet){
    return spritesheet->size;
}