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/* $Id: fb_gdkpixbuf.c,v 1.6 2002/07/22 16:17:32 ukai Exp $ */
/**************************************************************************
fb_gdkpixbuf.c 0.3 Copyright (C) 2002, hito
**************************************************************************/
#include <gdk-pixbuf/gdk-pixbuf.h>
#include "fb.h"
#include "fb_img.h"
static void draw(FB_IMAGE * img, GdkPixbuf * pixbuf);
static GdkPixbuf *resize_image(GdkPixbuf * pixbuf, int width, int height);
int
get_image_size(char *filename, int *w, int *h)
{
GdkPixbuf *pixbuf;
if (filename == NULL)
return 1;
pixbuf = gdk_pixbuf_new_from_file(filename);
if (pixbuf == NULL)
return 1;
*w = gdk_pixbuf_get_width(pixbuf);
*h = gdk_pixbuf_get_height(pixbuf);
gdk_pixbuf_finalize(pixbuf);
return 0;
}
FB_IMAGE *
fb_image_load(char *filename, int w, int h)
{
GdkPixbuf *pixbuf;
FB_IMAGE *img;
if (filename == NULL)
return NULL;
pixbuf = gdk_pixbuf_new_from_file(filename);
if (pixbuf == NULL)
return NULL;
pixbuf = resize_image(pixbuf, w, h);
if (pixbuf == NULL)
return NULL;
w = gdk_pixbuf_get_width(pixbuf);
h = gdk_pixbuf_get_height(pixbuf);
img = fb_image_new(w, h);
if (img == NULL) {
gdk_pixbuf_finalize(pixbuf);
return NULL;
}
draw(img, pixbuf);
gdk_pixbuf_finalize(pixbuf);
return img;
}
void
draw(FB_IMAGE * img, GdkPixbuf * pixbuf)
{
int i, j, r, g, b, offset, bpp, rowstride;
guchar *pixels;
gboolean alpha;
if (img == NULL || pixbuf == NULL)
return;
rowstride = gdk_pixbuf_get_rowstride(pixbuf);
pixels = gdk_pixbuf_get_pixels(pixbuf);
alpha = gdk_pixbuf_get_has_alpha(pixbuf);
bpp = rowstride / img->width;
for (j = 0; j < img->height; j++) {
offset = j * rowstride;
for (i = 0; i < img->width; i++, offset += bpp) {
r = pixels[offset];
g = pixels[offset + 1];
b = pixels[offset + 2];
if (alpha && pixels[offset + 3] == 0)
fb_image_pset(img, i, j, bg_r, bg_g, bg_b);
else
fb_image_pset(img, i, j, r, g, b);
}
}
return;
}
static GdkPixbuf *
resize_image(GdkPixbuf * pixbuf, int width, int height)
{
GdkPixbuf * resized_pixbuf;
int w, h;
if (pixbuf == NULL)
return NULL;
w = gdk_pixbuf_get_width(pixbuf);
h = gdk_pixbuf_get_height(pixbuf);
if (width < 1 || height < 1)
return pixbuf;
if (w == width && h == height)
return pixbuf;
resized_pixbuf =
gdk_pixbuf_scale_simple(pixbuf, width, height, GDK_INTERP_HYPER);
gdk_pixbuf_finalize(pixbuf);
if (resized_pixbuf == NULL)
return NULL;
return resized_pixbuf;
}
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