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#include "config.h"
#include <stdio.h>
#include <glib.h>
#include <string.h>
#include "portab.h"
#include "surface.h"
#include "system.h"
static surface_t *create(int width, int height, int depth, boolean has_pixel, boolean has_alpha) {
surface_t *s = g_new0(surface_t, 1);
s->width = width;
s->height = height;
s->has_alpha = has_alpha;
s->has_pixel = has_pixel;
s->bytes_per_line = width;
s->bytes_per_pixel = 1;
s->depth = depth;
if (s->has_pixel) {
switch (s->depth) {
case 8:
s->pixel = g_new0(BYTE, width * (height +1));
s->bytes_per_line = width;
s->bytes_per_pixel = 1;
break;
case 15:
case 16:
s->pixel = g_new0(BYTE, width * (height +1) * 2);
s->bytes_per_line = width * 2;
s->bytes_per_pixel = 2;
break;
case 24:
case 32:
s->pixel = g_new0(BYTE, width * (height +1) * 4);
s->bytes_per_line = width * 4;
s->bytes_per_pixel = 4;
break;
default:
WARNING("depth %d is not supported\n", s->depth);
}
} else {
s->pixel = NULL;
}
if (s->has_alpha) {
s->alpha = g_new0(BYTE, width * (height +1));
}
return s;
}
/**
* surface (pixel + alpha)
* @param width: surface
* @param height: surfaceι⤵
* @param depth: surfacepixelBPP (8|15|16|24|32), alpha8
* @return surface ֥
*/
surface_t *sf_create_surface(int width, int height, int depth) {
return create(width, height, depth, TRUE, TRUE);
}
/**
* surface (alphaΤ)
* @param width: surface
* @param height: surfaceι⤵
* @return surface ֥
*/
surface_t *sf_create_alpha(int width, int height) {
return create(width, height, 8, FALSE, TRUE);
}
/**
* surface (pixelΤ)
* @param width: surface
* @param height: surfaceι⤵
* @param depth: surfaceBPP(8|15|16|24|32)
* @return surface ֥
*/
surface_t *sf_create_pixel(int width, int height, int depth) {
return create(width, height, depth, TRUE, FALSE);
}
/**
* surface֥Ȥγ
* @param s: 륪֥
* @return: ʤ
*/
void sf_free(surface_t *s) {
if (s == NULL) return;
if (s->pixel) g_free(s->pixel);
if (s->alpha) g_free(s->alpha);
g_free(s);
}
/**
* surface ʣ(dupulicate)
* @param in: ʣ
* @return : ʣsurface
*/
surface_t *sf_dup(surface_t *in) {
surface_t *sf;
int len;
if (in == NULL) return NULL;
sf = g_new(surface_t, 1);
memcpy(sf, in, sizeof(surface_t));
if (in->has_pixel) {
len = sf->bytes_per_line * sf->height;
sf->pixel = g_new(BYTE, len + sf->bytes_per_line);
memcpy(sf->pixel, in->pixel, len);
}
if (in->has_alpha) {
len = sf->width * sf->height;
sf->alpha = g_new(BYTE, len + sf->width);
memcpy(sf->alpha, in->alpha, len);
}
return sf;
}
/**
* surfaceΤΥԡ
* @param dst: ԡ surface
* @param src: ԡ surface
* @return ʤ
*/
void sf_copyall(surface_t *dst, surface_t *src) {
int len;
if (src == NULL || dst == NULL) return;
if (src->width != dst->width) return;
if (src->height != dst->height) return;
if (src->bytes_per_pixel != dst->bytes_per_pixel) return;
if (src->has_alpha && dst->has_alpha) {
len = src->width * src->height;
memcpy(dst->alpha, src->alpha, len);
}
if (src->has_pixel && dst->has_pixel) {
len = src->bytes_per_line * src->height;
memcpy(dst->pixel, src->pixel, len);
}
}
/**
* surface ʣ
* @param in: ʣ
* @param copypixel: pixelԡ뤫
* @param copyalpha: alpha pixel ԡ뤫
* @return: ʣ surface
*/
surface_t *sf_dup2(surface_t *in, boolean copypixel, boolean copyalpha) {
surface_t *sf;
int len;
if (in == NULL) return NULL;
sf = g_new(surface_t, 1);
memcpy(sf, in, sizeof(surface_t));
if (in->has_pixel) {
len = sf->bytes_per_line * sf->height;
sf->pixel = g_new(BYTE, len + sf->bytes_per_line);
if (copypixel) {
memcpy(sf->pixel, in->pixel, len);
}
}
if (in->has_alpha) {
len = sf->width * sf->height;
sf->alpha = g_new(BYTE, len + sf->width);
if (copyalpha) {
memcpy(sf->alpha, in->alpha, len);
}
}
return sf;
}
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