archeus/packages/graphics/sdl3/sprite.c

#include "arc/graphics/sprite.h"

#include "spritesheet.h"
#include "arc/math/point.h"
#include "arc/math/rectangle.h"
#include "arc/std/errno.h"
#include <stdlib.h>
#include <SDL3/SDL.h>

void ARC_Sprite_Create(ARC_Sprite **sprite, ARC_Spritesheet *spritesheet, ARC_Array frames){
    *sprite = (ARC_Sprite *)malloc(sizeof(ARC_Sprite));
    (*sprite)->spritesheet = spritesheet;
    (*sprite)->frames = frames;
    (*sprite)->frameIndex = 0;

    (*sprite)->angle = 0.0;

    (*sprite)->origin = (ARC_FPoint){ 0.0, 0.0 };

    //called this way to also set the alpha mod
    ARC_Sprite_SetOpacity(*sprite, 1.0f);

    (*sprite)->axis = ARC_SPRITE_AXIS_NONE;
}

void ARC_Sprite_Destroy(ARC_Sprite *sprite){
    free(sprite);
}

void ARC_Sprite_Copy(ARC_Sprite **newSprite, ARC_Sprite *oldSprite){
    *newSprite = (ARC_Sprite *)malloc(sizeof(ARC_Sprite));
    (*newSprite)->spritesheet = oldSprite->spritesheet;
    (*newSprite)->frames      = oldSprite->frames;
    (*newSprite)->frameIndex  = oldSprite->frameIndex;
    (*newSprite)->angle       = oldSprite->angle;
    (*newSprite)->origin      = oldSprite->origin;
    (*newSprite)->opacity     = oldSprite->opacity;
}

void ARC_Sprite_Render(ARC_Sprite *sprite, ARC_Renderer *renderer, ARC_FRect renderBounds){
    SDL_RenderTexture((SDL_Renderer *)renderer, sprite->spritesheet->texture, (SDL_FRect *)(sprite->frames.data + sprite->frameIndex), (SDL_FRect *)&renderBounds);
}

void ARC_Sprite_RenderAt(ARC_Sprite *sprite, ARC_Renderer *renderer, ARC_FPoint point, double scale){
    ARC_FRect sourceRect = *(ARC_FRect *)(sprite->frames.data + sprite->frameIndex);
    //TODO: check that this works
    ARC_FRect destinationRect = {
        (point.x - sprite->origin.x) * scale,
        (point.y - sprite->origin.y) * scale,
        sourceRect.w * scale,
        sourceRect.h * scale
    };

    //TODO: probably want to optomize this
    SDL_FlipMode flip = SDL_FLIP_NONE;
    if(sprite->axis & ARC_SPRITE_AXIS_X){
        flip |= SDL_FLIP_HORIZONTAL;
    }

    if(sprite->axis & ARC_SPRITE_AXIS_Y){
        flip |= SDL_FLIP_VERTICAL;
    }

    SDL_RenderTextureRotated((SDL_Renderer *)renderer, sprite->spritesheet->texture, (SDL_FRect *)&sourceRect, (SDL_FRect *)&destinationRect, sprite->angle, (SDL_FPoint *)&(sprite->origin), flip);
}

void ARC_Sprite_IterateFrame(ARC_Sprite *sprite){
    sprite->frameIndex++;

    if(sprite->frameIndex == sprite->frames.size){
        sprite->frameIndex = 0;
    }
}

void ARC_Sprite_SetFrameIndex(ARC_Sprite *sprite, uint32_t index){
    if(sprite->frames.size <= index){
        arc_errno = ARC_ERRNO_DATA;
        ARC_DEBUG_LOG_ERROR_WITH_VARIABLES("in ARC_Sprite_SetFrameIndex(sprite, %d); index out of bounds", index);
        return;
    }
    sprite->frameIndex = index;
}

void ARC_Sprite_SetAngle(ARC_Sprite *sprite, double angle){
    sprite->angle = angle;
}

void ARC_Sprite_SetOrigin(ARC_Sprite *sprite, ARC_FPoint origin){
    sprite->origin = origin;
}

void ARC_Sprite_SetOpacity(ARC_Sprite *sprite, float opacity){
    sprite->opacity = opacity;
    SDL_SetTextureAlphaMod((SDL_Texture *)sprite->spritesheet->texture, sprite->opacity); 
}

uint32_t ARC_Sprite_GetFrameIndex(ARC_Sprite *sprite){
    return sprite->frameIndex;
}

ARC_FRect *ARC_Sprite_GetBounds(ARC_Sprite *sprite){
    return (ARC_FRect *)sprite->frames.data + sprite->frameIndex;
}

ARC_Array ARC_Sprite_GetAllBounds(ARC_Sprite *sprite){
    return sprite->frames;
}