x11_w3mimg.c

一个终端下的网页浏览器

/* $Id: x11_w3mimg.c,v 1.25 2003/07/13 16:19:10 ukai Exp $ */
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include "config.h"

#if defined(USE_IMLIB)
#include <Imlib.h>
#elif defined(USE_IMLIB2)
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <Imlib2.h>
#elif defined(USE_GDKPIXBUF)
#include <gdk-pixbuf/gdk-pixbuf-xlib.h>
#else
#error no Imlib and GdkPixbuf support
#endif

#include "w3mimg/w3mimg.h"

#define OFFSET_X	2
#define OFFSET_Y	2

struct x11_info {
    Display *display;
    Window window, parent;
    unsigned long background_pixel;
    GC imageGC;
#if defined(USE_IMLIB)
    ImlibData *id;
#elif defined(USE_GDKPIXBUF)
    int init_flag;
#endif
};

#if defined(USE_GDKPIXBUF)
struct x11_image {
    int total;
    int no;
    int wait;
    int delay;
    Pixmap *pixmap;
};

static void
get_animation_size(GdkPixbufAnimation * animation, int *w, int *h, int *delay)
{
    GList *frames;
    int iw, ih, n, i, d = -1;

    frames = gdk_pixbuf_animation_get_frames(animation);
    n = gdk_pixbuf_animation_get_num_frames(animation);
    *w = gdk_pixbuf_animation_get_width(animation);
    *h = gdk_pixbuf_animation_get_height(animation);
    for (i = 0; i < n; i++) {
	GdkPixbufFrame *frame;
	GdkPixbuf *pixbuf;
	int tmp;

	frame = (GdkPixbufFrame *) g_list_nth_data(frames, i);
	tmp = gdk_pixbuf_frame_get_delay_time(frame);
	if (tmp > d)
	    d = tmp;
	pixbuf = gdk_pixbuf_frame_get_pixbuf(frame);
	iw = gdk_pixbuf_frame_get_x_offset(frame)
	    + gdk_pixbuf_get_width(pixbuf);
	ih = gdk_pixbuf_frame_get_y_offset(frame)
	    + gdk_pixbuf_get_height(pixbuf);
	if (iw > *w)
	    *w = iw;
	if (ih > *h)
	    *h = ih;
    }
    if (delay)
	*delay = d;
}

#endif

static int
x11_init(w3mimg_op * self)
{
    struct x11_info *xi;
    if (self == NULL)
	return 0;
    xi = (struct x11_info *)self->priv;
    if (xi == NULL)
	return 0;
#if defined(USE_IMLIB)
    if (!xi->id) {
	xi->id = Imlib_init(xi->display);
	if (!xi->id)
	    return 0;
    }
#elif defined(USE_GDKPIXBUF)
    if (!xi->init_flag) {
	gdk_pixbuf_xlib_init(xi->display, 0);
	xi->init_flag = TRUE;
    }
#endif
    if (!xi->imageGC) {
	xi->imageGC = XCreateGC(xi->display, xi->parent, 0, NULL);
	if (!xi->imageGC)
	    return 0;
    }
    return 1;
}

static int
x11_finish(w3mimg_op * self)
{
    struct x11_info *xi;
    if (self == NULL)
	return 0;
    xi = (struct x11_info *)self->priv;
    if (xi == NULL)
	return 0;
    if (xi->imageGC) {
	XFreeGC(xi->display, xi->imageGC);
	xi->imageGC = NULL;
    }
    return 1;
}

static int
x11_clear(w3mimg_op * self, int x, int y, int w, int h)
{
    struct x11_info *xi;
    if (self == NULL)
	return 0;
    xi = (struct x11_info *)self->priv;
    if (xi == NULL)
	return 0;

    if (x < 0)
	x = 0;
    if (y < 0)
	y = 0;

    XClearArea(xi->display, xi->window, x, y, w, h, False);
    return 1;
}

static int
x11_active(w3mimg_op * self)
{
    struct x11_info *xi;
    if (self == NULL)
	return 0;
    xi = (struct x11_info *)self->priv;
    if (xi == NULL)
	return 0;
    if (!xi->imageGC)
	return 0;
    return 1;
}

static void
x11_set_background(w3mimg_op * self, char *background)
{
    XColor screen_def, exact_def;
    struct x11_info *xi;
    if (self == NULL)
	return;
    xi = (struct x11_info *)self->priv;
    if (xi == NULL)
	return;

    if (background &&
	XAllocNamedColor(xi->display, DefaultColormap(xi->display, 0),
			 background, &screen_def, &exact_def))
	xi->background_pixel = screen_def.pixel;
    else {
	Pixmap p;
	GC gc;
	XImage *i;

	p = XCreatePixmap(xi->display, xi->window, 1, 1,
			  DefaultDepth(xi->display, 0));
	gc = XCreateGC(xi->display, xi->window, 0, NULL);
	if (!p || !gc)
	    exit(1);		/* XXX */
	XCopyArea(xi->display, xi->window, p, gc,
		  (self->offset_x >= 1) ? (self->offset_x - 1) : 0,
		  (self->offset_y >= 1) ? (self->offset_y - 1) : 0,
		  1, 1, 0, 0);
	i = XGetImage(xi->display, p, 0, 0, 1, 1, -1, ZPixmap);
	if (!i)
	    exit(1);
	xi->background_pixel = XGetPixel(i, 0, 0);
	XDestroyImage(i);
	XFreeGC(xi->display, gc);
	XFreePixmap(xi->display, p);
    }
}

static void
x11_sync(w3mimg_op * self)
{
    struct x11_info *xi;
    if (self == NULL)
	return;
    xi = (struct x11_info *)self->priv;
    if (xi == NULL)
	return;
    XSync(xi->display, False);
}

static void
x11_close(w3mimg_op * self)
{
    /* XCloseDisplay(xi->display); */
}

#if defined(USE_GDKPIXBUF)
static struct x11_image *
x11_img_new(struct x11_info *xi, int w, int h, int n)
{
    struct x11_image *img = NULL;
    int i;

    img = malloc(sizeof(*img));
    if (!img)
	goto ERROR;

    img->pixmap = calloc(n, sizeof(*(img->pixmap)));
    if (!img->pixmap)
	goto ERROR;

    for (i = 0; i < n; i++) {
	img->pixmap[i] = XCreatePixmap(xi->display, xi->parent, w, h,
				       DefaultDepth(xi->display, 0));
	if (!img->pixmap[i])
	    goto ERROR;

	XSetForeground(xi->display, xi->imageGC, xi->background_pixel);
	XFillRectangle(xi->display, (Pixmap) img->pixmap[i], xi->imageGC, 0, 0,
		       w, h);
    }

    img->no = 0;
    img->total = n;
    img->wait = 0;
    img->delay = -1;

    return img;
  ERROR:
    if (img) {
	if (img->pixmap) {
	    for (i = 0; i < n; i++) {
		if (img->pixmap[i])
		    XFreePixmap(xi->display, (Pixmap) img->pixmap[i]);
	    }
	    free(img->pixmap);
	}
	free(img);
    }
    return NULL;
}

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_BILINEAR);
    if (resized_pixbuf == NULL)
	return NULL;
    return resized_pixbuf;
}
#endif

static int
x11_load_image(w3mimg_op * self, W3MImage * img, char *fname, int w, int h)
{
    struct x11_info *xi;
#if defined(USE_IMLIB)
    ImlibImage *im;
#elif defined(USE_IMLIB2)
    Imlib_Image im;
#elif defined(USE_GDKPIXBUF)
    GdkPixbufAnimation *animation;
    GList *frames;
    int i, j, iw, ih, n, frame_num, delay, max_anim;
    double ratio_w, ratio_h;
    struct x11_image *ximg;
    Pixmap tmp_pixmap;
#endif

    if (self == NULL)
	return 0;
    xi = (struct x11_info *)self->priv;
    if (xi == NULL)
	return 0;

#if defined(USE_IMLIB)
    im = Imlib_load_image(xi->id, fname);
    if (!im)
	return 0;
    if (w <= 0)
	w = im->rgb_width;
    if (h <= 0)
	h = im->rgb_height;
    img->pixmap = (void *)XCreatePixmap(xi->display, xi->parent, w, h,
					DefaultDepth(xi->display, 0));
    if (!img->pixmap)
	return 0;
    XSetForeground(xi->display, xi->imageGC, xi->background_pixel);
    XFillRectangle(xi->display, (Pixmap) img->pixmap, xi->imageGC, 0, 0, w, h);
    Imlib_paste_image(xi->id, im, (Pixmap) img->pixmap, 0, 0, w, h);
    Imlib_kill_image(xi->id, im);
#elif defined(USE_IMLIB2)
    im = imlib_load_image(fname);
    if (!im)
	return 0;
    imlib_context_set_image(im);
    if (w <= 0)
	w = imlib_image_get_width();
    if (h <= 0)
	h = imlib_image_get_height();
    img->pixmap = (void *)XCreatePixmap(xi->display, xi->parent, w, h,
					DefaultDepth(xi->display, 0));
    if (!img->pixmap)
	return 0;
    XSetForeground(xi->display, xi->imageGC, xi->background_pixel);
    XFillRectangle(xi->display, (Pixmap) img->pixmap, xi->imageGC, 0, 0, w, h);
    imlib_context_set_display(xi->display);
    imlib_context_set_visual(DefaultVisual(xi->display, 0));
    imlib_context_set_colormap(DefaultColormap(xi->display, 0));
    imlib_context_set_drawable((Drawable) img->pixmap);
    imlib_render_image_on_drawable_at_size(0, 0, w, h);
    imlib_free_image();
#elif defined(USE_GDKPIXBUF)
    max_anim = self->max_anim;
    animation = gdk_pixbuf_animation_new_from_file(fname);
    if (!animation)
	return 0;
    frames = gdk_pixbuf_animation_get_frames(animation);
    frame_num = n = gdk_pixbuf_animation_get_num_frames(animation);

    get_animation_size(animation, &iw, &ih, &delay);
    if (delay <= 0)
	max_anim = -1;

    if (max_anim < 0) {
	frame_num = (-max_anim > n) ? n : -max_anim;
    }
    else if (max_anim > 0) {
	frame_num = n = (max_anim > n) ? n : max_anim;
    }

    if (w < 1 || h < 1) {