static int get_rgb_shifts(void)
{
get_shifts(xwa.visual->red_mask, &r_pos, &r_size, &r_scale);
get_shifts(xwa.visual->green_mask, &g_pos, &g_size, &g_scale);
get_shifts(xwa.visual->blue_mask, &b_pos, &b_size, &b_scale);
return (1 << r_size) * (1 << g_size) * (1 << b_size);
}
action* parse_actions(int stateno) {
register action *actions;
actions = get_shifts(stateno);
actions = add_reductions(stateno, actions);
return (actions);
}
RImage *RCreateImageFromXImage(RContext * context, XImage * image, XImage * mask)
{
RImage *img;
int x, y;
unsigned long pixel;
unsigned char *data;
int rshift, gshift, bshift;
int rmask, gmask, bmask;
assert(image != NULL);
assert(image->format == ZPixmap);
assert(!mask || mask->format == ZPixmap);
img = RCreateImage(image->width, image->height, mask != NULL);
if (!img) {
return NULL;
}
/* I don't know why, but XGetImage() for pixmaps don't set the
* {red,green,blue}_mask values correctly.
*/
if (context->depth == image->depth) {
rmask = context->visual->red_mask;
gmask = context->visual->green_mask;
bmask = context->visual->blue_mask;
} else {
rmask = image->red_mask;
gmask = image->green_mask;
bmask = image->blue_mask;
}
/* how many bits to shift to normalize the color into 8bpp */
rshift = get_shifts(rmask) - 8;
gshift = get_shifts(gmask) - 8;
bshift = get_shifts(bmask) - 8;
data = img->data;
if (image->depth == 1) {
for (y = 0; y < image->height; y++) {
for (x = 0; x < image->width; x++) {
pixel = XGetPixel(image, x, y);
if (pixel) {
*data++ = 0;
*data++ = 0;
*data++ = 0;
} else {
*data++ = 0xff;
*data++ = 0xff;
*data++ = 0xff;
}
if (mask)
data++;
}
}
} else {
for (y = 0; y < image->height; y++) {
for (x = 0; x < image->width; x++) {
pixel = XGetPixel(image, x, y);
*(data++) = NORMALIZE_RED(pixel);
*(data++) = NORMALIZE_GREEN(pixel);
*(data++) = NORMALIZE_BLUE(pixel);
if (mask)
data++;
}
}
}
#define MIN(a,b) ((a)<(b)?(a):(b))
if (mask) {
data = img->data + 3; /* Skip R, G & B */
for (y = 0; y < MIN(mask->height, image->height); y++) {
for (x = 0; x < MIN(mask->width, image->width); x++) {
if (mask->width <= image->width && XGetPixel(mask, x, y)) {
*data = 0xff;
} else {
*data = 0;
}
data += 4;
}
for (; x < image->width; x++) {
*data = 0;
data += 4;
}
}
for (; y < image->height; y++) {
for (x = 0; x < image->width; x++) {
*data = 0;
data += 4;
}
}
}
return img;
}
