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#include <math.h> |
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#include "../config.h" |
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#include "rxvt.h" |
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|
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#if HAVE_IMG |
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|
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#define float_to_component(d) ((d) * 65535.99) |
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|
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rxvt_img::rxvt_img (rxvt_screen *screen, XRenderPictFormat *format, int width, int height) |
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: s(screen), w(width), h(height), format(format), shared(false) |
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{ |
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pm = XCreatePixmap (s->display->dpy, s->display->root, w, h, format->depth); |
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} |
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|
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rxvt_img::rxvt_img (rxvt_screen *screen, XRenderPictFormat *format, int width, int height, Pixmap pixmap) |
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: s(screen), pm(pixmap), w(width), h(height), format(format), shared(false) |
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{ |
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} |
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|
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rxvt_img * |
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rxvt_img::new_from_file (rxvt_screen *s, const char *filename) |
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{ |
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GError *err; |
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GdkPixbuf *pb = gdk_pixbuf_new_from_file (filename, &err); |
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|
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if (!pb) |
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return 0; |
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|
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rxvt_img *img = new rxvt_img ( |
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s, |
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XRenderFindStandardFormat (s->display->dpy, gdk_pixbuf_get_has_alpha (pb) ? PictStandardARGB32 : PictStandardRGB24), |
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gdk_pixbuf_get_width (pb), |
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gdk_pixbuf_get_height (pb) |
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); |
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|
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img->render (pb, 0, 0, img->w, img->h, 0, 0); |
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|
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return img; |
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} |
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|
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rxvt_img::~rxvt_img () |
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{ |
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if (!shared) |
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XFreePixmap (s->display->dpy, pm); |
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} |
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|
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void |
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rxvt_img::fill (const rxvt_color &c) |
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{ |
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XGCValues gcv; |
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gcv.foreground = c; |
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GC gc = XCreateGC (s->display->dpy, pm, GCForeground, &gcv); |
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XFillRectangle (s->display->dpy, pm, gc, 0, 0, w, h); |
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XFreeGC (s->display->dpy, gc); |
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} |
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|
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static void |
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get_gaussian_kernel (int radius, int width, double *kernel, XFixed *params) |
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{ |
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double sigma = radius / 2.0; |
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double scale = sqrt (2.0 * M_PI) * sigma; |
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double sum = 0.0; |
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|
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for (int i = 0; i < width; i++) |
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{ |
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double x = i - width / 2; |
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kernel[i] = exp (-(x * x) / (2.0 * sigma * sigma)) / scale; |
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sum += kernel[i]; |
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} |
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|
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params[0] = XDoubleToFixed (width); |
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params[1] = XDoubleToFixed (1); |
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|
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for (int i = 0; i < width; i++) |
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params[i+2] = XDoubleToFixed (kernel[i] / sum); |
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} |
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|
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void |
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rxvt_img::blur (int rh, int rv) |
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{ |
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if (!(s->display->flags & DISPLAY_HAS_RENDER_CONV)) |
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return; |
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|
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Display *dpy = s->display->dpy; |
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int size = max (rh, rv) * 2 + 1; |
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double *kernel = (double *)malloc (size * sizeof (double)); |
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XFixed *params = (XFixed *)malloc ((size + 2) * sizeof (XFixed)); |
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|
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XRenderPictureAttributes pa; |
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|
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pa.repeat = RepeatPad; |
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Picture src = XRenderCreatePicture (dpy, pm, format, CPRepeat, &pa); |
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Pixmap tmp = XCreatePixmap (dpy, pm, w, h, format->depth); |
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Picture dst = XRenderCreatePicture (dpy, tmp, format, CPRepeat, &pa); |
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XFreePixmap (dpy, tmp); |
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|
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if (kernel && params) |
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{ |
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size = rh * 2 + 1; |
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get_gaussian_kernel (rh, size, kernel, params); |
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|
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XRenderSetPictureFilter (dpy, src, FilterConvolution, params, size+2); |
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XRenderComposite (dpy, |
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PictOpSrc, |
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src, |
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None, |
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dst, |
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0, 0, |
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0, 0, |
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0, 0, |
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w, h); |
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|
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::swap (src, dst); |
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|
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size = rv * 2 + 1; |
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get_gaussian_kernel (rv, size, kernel, params); |
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::swap (params[0], params[1]); |
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|
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XRenderSetPictureFilter (dpy, src, FilterConvolution, params, size+2); |
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XRenderComposite (dpy, |
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PictOpSrc, |
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src, |
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None, |
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dst, |
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0, 0, |
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0, 0, |
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0, 0, |
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w, h); |
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} |
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|
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free (kernel); |
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free (params); |
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XRenderFreePicture (dpy, src); |
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XRenderFreePicture (dpy, dst); |
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} |
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|
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static Picture |
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create_xrender_mask (Display *dpy, Drawable drawable, Bool argb) |
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{ |
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Pixmap pixmap = XCreatePixmap (dpy, drawable, 1, 1, argb ? 32 : 8); |
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|
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XRenderPictFormat *format = XRenderFindStandardFormat (dpy, argb ? PictStandardARGB32 : PictStandardA8); |
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XRenderPictureAttributes pa; |
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pa.repeat = True; |
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Picture mask = XRenderCreatePicture (dpy, pixmap, format, CPRepeat, &pa); |
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|
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XFreePixmap (dpy, pixmap); |
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|
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return mask; |
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} |
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|
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void |
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rxvt_img::brightness (double r, double g, double b, double a) |
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{ |
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Display *dpy = s->display->dpy; |
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Picture src = create_xrender_mask (dpy, pm, True); |
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Picture dst = XRenderCreatePicture (dpy, pm, format, 0, 0); |
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|
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XRenderColor mask_c; |
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mask_c.red = float_to_component (r); |
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mask_c.green = float_to_component (g); |
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mask_c.blue = float_to_component (b); |
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mask_c.alpha = float_to_component (a); |
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XRenderFillRectangle (dpy, PictOpSrc, src, &mask_c, 0, 0, 1, 1); |
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|
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XRenderComposite (dpy, PictOpAdd, src, None, dst, 0, 0, 0, 0, 0, 0, w, h); |
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} |
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|
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void |
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rxvt_img::contrast (double r, double g, double b, double a) |
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{ |
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if (!(s->display->flags & DISPLAY_HAS_RENDER_MUL)) |
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return; |
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|
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Display *dpy = s->display->dpy; |
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Picture src = create_xrender_mask (dpy, pm, True); |
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Picture dst = XRenderCreatePicture (dpy, pm, format, 0, 0); |
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|
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XRenderColor mask_c; |
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mask_c.red = float_to_component (r); |
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mask_c.green = float_to_component (g); |
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mask_c.blue = float_to_component (b); |
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mask_c.alpha = float_to_component (a); |
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XRenderFillRectangle (dpy, PictOpSrc, src, &mask_c, 0, 0, 1, 1); |
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|
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XRenderComposite (dpy, PictOpMultiply, src, None, dst, 0, 0, 0, 0, 0, 0, w, h); |
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} |
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|
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void |
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rxvt_img::render (GdkPixbuf *pixbuf, int src_x, int src_y, int width, int height, int dst_x, int dst_y) |
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{ |
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//TODO |
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} |
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|
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rxvt_img * |
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rxvt_img::copy () |
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{ |
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GC gc = XCreateGC (s->display->dpy, pm, 0, 0); |
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Pixmap pm2 = XCreatePixmap (s->display->dpy, pm, w, h, format->depth); |
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XCopyArea (s->display->dpy, pm, pm2, gc, 0, 0, w, h, 0, 0); |
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XFreeGC (s->display->dpy, gc); |
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return new rxvt_img (s, format, w, h, pm2); |
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} |
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|
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rxvt_img * |
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rxvt_img::transform (int new_width, int new_height, double matrix[16]) |
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{ |
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//TODO |
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} |
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|
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rxvt_img * |
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rxvt_img::scale (int new_width, int new_height) |
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{ |
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// use transform |
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//TODO |
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} |
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|
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|
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#endif |
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|