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#include "config.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <SDL.h>
#include "portab.h"
#include "surface.h"
#include "system.h"
static surface_t *create(int width, int height, bool has_pixel, bool has_alpha) {
surface_t *s = calloc(1, sizeof(surface_t));
s->width = width;
s->height = height;
if (has_pixel) {
s->sdl_surface = SDL_CreateRGBSurfaceWithFormat(0, width, height, 32, SDL_PIXELFORMAT_RGB888);
}
if (has_alpha) {
s->alpha = calloc(width * (height +1), sizeof(uint8_t));
}
return s;
}
// Create a surface with pixel and alpha data
surface_t *sf_create_surface(int width, int height) {
return create(width, height, true, true);
}
// Create a surface with alpha data only
surface_t *sf_create_alpha(int width, int height) {
return create(width, height, false, true);
}
// Create a surface with pixel data only
surface_t *sf_create_pixel(int width, int height) {
return create(width, height, true, false);
}
/**
* surfaceオブジェクトの開放
* @param s: 開放するオブジェクト
* @return: なし
*/
void sf_free(surface_t *s) {
if (s == NULL) return;
if (s->sdl_surface) SDL_FreeSurface(s->sdl_surface);
if (s->alpha) free(s->alpha);
free(s);
}
/**
* surface の複製を作成(dupulicate)
* @param in: 複製もと
* @return : 複製したsurface
*/
surface_t *sf_dup(surface_t *in) {
surface_t *sf;
int len;
if (in == NULL) return NULL;
sf = malloc(sizeof(surface_t));
memcpy(sf, in, sizeof(surface_t));
if (in->sdl_surface) {
sf->sdl_surface = SDL_ConvertSurface(in->sdl_surface, in->sdl_surface->format, 0);
}
if (in->alpha) {
len = sf->width * sf->height;
sf->alpha = malloc(sizeof(uint8_t) * (len + sf->width));
memcpy(sf->alpha, in->alpha, len);
}
return sf;
}
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