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/* $Id: fb_gdkpixbuf.c,v 1.8 2002/09/09 14:00:18 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, int bg, int x, int y, int w, int h,
GdkPixbuf * pixbuf);
static GdkPixbuf *resize_image(GdkPixbuf * pixbuf, int width, int height);
int
get_image_size(char *filename, int *w, int *h)
{
GdkPixbufAnimation *animation;
if (filename == NULL)
return 1;
animation = gdk_pixbuf_animation_new_from_file(filename);
if (animation == NULL)
return 1;
*w = gdk_pixbuf_animation_get_width(animation);
*h = gdk_pixbuf_animation_get_height(animation);
gdk_pixbuf_animation_unref(animation);
return 0;
}
FB_IMAGE **
fb_image_load(char *filename, int w, int h)
{
GdkPixbufAnimation *animation;
GList *frames;
double ratio_w, ratio_h;
int n, i, fw, fh;
FB_IMAGE **fb_frame;
GdkPixbufFrameAction action = GDK_PIXBUF_FRAME_REVERT;
if (filename == NULL)
return NULL;
animation = gdk_pixbuf_animation_new_from_file(filename);
if (animation == NULL)
return NULL;
frames = gdk_pixbuf_animation_get_frames(animation);
fw = gdk_pixbuf_animation_get_width(animation);
fh = gdk_pixbuf_animation_get_height(animation);
n = gdk_pixbuf_animation_get_num_frames(animation);
if (w < 1 || h < 1) {
w = fw;
h = fh;
ratio_w = ratio_h = 1;
}
else {
ratio_w = 1.0 * w / fw;
ratio_h = 1.0 * h / fh;
}
fb_frame = fb_frame_new(w, h, n);
if (fb_frame == NULL)
goto END;
for (i = 0; i < n; i++) {
GdkPixbufFrame *frame;
GdkPixbuf *org_pixbuf, *pixbuf;
int width, height, ofstx, ofsty;
frame = (GdkPixbufFrame *) g_list_nth_data(frames, i);
org_pixbuf = gdk_pixbuf_frame_get_pixbuf(frame);
ofstx = gdk_pixbuf_frame_get_x_offset(frame);
ofsty = gdk_pixbuf_frame_get_y_offset(frame);
width = gdk_pixbuf_get_width(org_pixbuf);
height = gdk_pixbuf_get_height(org_pixbuf);
if (ofstx == 0 && ofsty == 0 && width == fw && height == fh) {
pixbuf = resize_image(org_pixbuf, w, h);
}
else {
pixbuf =
resize_image(org_pixbuf, width * ratio_w, height * ratio_h);
ofstx *= ratio_w;
ofsty *= ratio_h;
}
width = gdk_pixbuf_get_width(pixbuf);
height = gdk_pixbuf_get_height(pixbuf);
fb_frame[i]->delay = gdk_pixbuf_frame_get_delay_time(frame);
if (i > 0) {
switch (action) {
case GDK_PIXBUF_FRAME_RETAIN:
fb_image_copy(fb_frame[i], fb_frame[i - 1]);
break;
case GDK_PIXBUF_FRAME_DISPOSE:
if (bg_r != 0 || bg_g != 0 || bg_b != 0) {
fb_image_fill(fb_frame[i], bg_r, bg_g, bg_b);
}
break;
case GDK_PIXBUF_FRAME_REVERT:
fb_image_copy(fb_frame[i], fb_frame[0]);
break;
default:
fb_image_copy(fb_frame[i], fb_frame[0]);
}
}
action = gdk_pixbuf_frame_get_action(frame);
draw(fb_frame[i], !i, ofstx, ofsty, width, height, pixbuf);
if (org_pixbuf != pixbuf)
gdk_pixbuf_finalize(pixbuf);
}
END:
gdk_pixbuf_animation_unref(animation);
return fb_frame;
}
static void
draw(FB_IMAGE * img, int bg, int x, int y, int w, int h, 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 / w;
for (j = 0; j < h; j++) {
offset = j * rowstride;
for (i = 0; i < w; i++, offset += bpp) {
r = pixels[offset];
g = pixels[offset + 1];
b = pixels[offset + 2];
if (alpha && pixels[offset + 3] == 0) {
if (bg)
fb_image_pset(img, i + x, j + y, bg_r, bg_g, bg_b);
}
else {
fb_image_pset(img, i + x, j + y, 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);
if (resized_pixbuf == NULL)
return NULL;
return resized_pixbuf;
}
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