#include "geom.h"
#include "image.h"
#include "color.h"
+#include "imagecache.h"
#include <glib.h>
#define FLOOR(i) ((i) & (~0UL << FRACTION))
#define AVERAGE(a, b) (((((a) ^ (b)) & 0xfefefefeL) >> 1) + ((a) & (b)))
-static void ImageCopyResampled(RrPixel32 *dst, RrPixel32 *src,
- gulong dstW, gulong dstH,
- gulong srcW, gulong srcH)
+void RrImagePicInit(RrImagePic *pic, gint w, gint h, RrPixel32 *data)
{
+ gint i;
+
+ pic->width = w;
+ pic->height = h;
+ pic->data = data;
+ pic->sum = 0;
+ for (i = w*h; i > 0; --i)
+ pic->sum += *(data++);
+}
+
+static void RrImagePicFree(RrImagePic *pic)
+{
+ if (pic) {
+ g_free(pic->data);
+ g_free(pic);
+ }
+}
+
+/*! Add a picture to an Image, that is, add another copy of the image at
+ another size. This may add it to the "originals" list or to the
+ "resized" list. */
+static void AddPicture(RrImage *self, RrImagePic ***list, gint *len,
+ RrImagePic *pic)
+{
+ gint i;
+
+ g_assert(pic->width > 0 && pic->height > 0);
+
+ g_assert(g_hash_table_lookup(self->cache->table, pic) == NULL);
+
+ /* grow the list */
+ *list = g_renew(RrImagePic*, *list, ++*len);
+
+ /* move everything else down one */
+ for (i = *len-1; i > 0; --i)
+ (*list)[i] = (*list)[i-1];
+
+ /* set the new picture up at the front of the list */
+ (*list)[0] = pic;
+
+ /* add the picture as a key to point to this image in the cache */
+ g_hash_table_insert(self->cache->table, (*list)[0], self);
+
+#ifdef DEBUG
+ g_debug("Adding %s picture to the cache:\n "
+ "Image 0x%x, w %d h %d Hash %u",
+ (*list == self->original ? "ORIGINAL" : "RESIZED"),
+ (guint)self, pic->width, pic->height, RrImagePicHash(pic));
+#endif
+}
+
+/*! Remove a picture from an Image. This may remove it from the "originals"
+ list or the "resized" list. */
+static void RemovePicture(RrImage *self, RrImagePic ***list,
+ gint i, gint *len)
+{
+ gint j;
+
+#ifdef DEBUG
+ g_debug("Removing %s picture from the cache:\n "
+ "Image 0x%x, w %d h %d Hash %u",
+ (*list == self->original ? "ORIGINAL" : "RESIZED"),
+ (guint)self, (*list)[i]->width, (*list)[i]->height,
+ RrImagePicHash((*list)[i]));
+#endif
+
+ /* remove the picture as a key in the cache */
+ g_hash_table_remove(self->cache->table, (*list)[i]);
+
+ /* free the picture */
+ RrImagePicFree((*list)[i]);
+ /* shift everything down one */
+ for (j = i; j < *len-1; ++j)
+ (*list)[j] = (*list)[j+1];
+ /* shrink the list */
+ *list = g_renew(RrImagePic*, *list, --*len);
+}
+
+/*! Given a picture in RGBA format, of a specified size, resize it to the new
+ requested size (but keep its aspect ratio). If the image does not need to
+ be resized (it is already the right size) then this returns NULL. Otherwise
+ it returns a newly allocated RrImagePic with the resized picture inside it
+*/
+static RrImagePic* ResizeImage(RrPixel32 *src,
+ gulong srcW, gulong srcH,
+ gulong dstW, gulong dstH)
+{
+ RrPixel32 *dst, *dststart;
+ RrImagePic *pic;
gulong dstX, dstY, srcX, srcY;
gulong srcX1, srcX2, srcY1, srcY2;
gulong ratioX, ratioY;
+ gulong aspectW, aspectH;
+
+ /* keep the aspect ratio */
+ aspectW = dstW;
+ aspectH = (gint)(dstW * ((gdouble)srcH / srcW));
+ if (aspectH > dstH) {
+ aspectH = dstH;
+ aspectW = (gint)(dstH * ((gdouble)srcW / srcH));
+ }
+ dstW = aspectW;
+ dstH = aspectH;
+
+ if (srcW == dstW && srcH == dstH)
+ return NULL; /* no scaling needed ! */
+
+ dststart = dst = g_new(RrPixel32, dstW * dstH);
ratioX = (srcW << FRACTION) / dstW;
ratioY = (srcH << FRACTION) / dstH;
(alpha << RrDefaultAlphaOffset);
}
}
+
+ pic = g_new(RrImagePic, 1);
+ RrImagePicInit(pic, dstW, dstH, dststart);
+
+ return pic;
}
-void RrImageDraw(RrPixel32 *target, RrTextureRGBA *rgba,
- gint target_w, gint target_h,
- RrRect *area)
+/*! This drawns an RGBA picture into the target, within the rectangle specified
+ by the area parameter. If the area's size differs from the source's then it
+ will be centered within the rectangle */
+void DrawRGBA(RrPixel32 *target, gint target_w, gint target_h,
+ RrPixel32 *source, gint source_w, gint source_h,
+ gint alpha, RrRect *area)
{
RrPixel32 *dest;
- RrPixel32 *source;
- gint sw, sh, dw, dh;
gint col, num_pixels;
+ gint dw, dh;
- sw = rgba->width;
- sh = rgba->height;
+ g_assert(source_w <= area->width && source_h <= area->height);
+ g_assert(area->x + area->width <= target_w);
+ g_assert(area->y + area->height <= target_h);
- /* keep the ratio */
+ /* keep the aspect ratio */
dw = area->width;
- dh = (gint)(dw * ((gdouble)sh / sw));
+ dh = (gint)(dw * ((gdouble)source_h / source_w));
if (dh > area->height) {
dh = area->height;
- dw = (gint)(dh * ((gdouble)sw / sh));
- }
-
- if (sw != dw || sh != dh) {
- /*if (!(rgba->cache && dw == rgba->cwidth && dh == rgba->cheight))*/ {
- g_free(rgba->cache);
- rgba->cache = g_new(RrPixel32, dw * dh);
- ImageCopyResampled(rgba->cache, rgba->data, dw, dh, sw, sh);
- rgba->cwidth = dw;
- rgba->cheight = dh;
- }
- source = rgba->cache;
- } else {
- source = rgba->data;
+ dw = (gint)(dh * ((gdouble)source_w / source_h));
}
/* copy source -> dest, and apply the alpha channel.
-
center the image if it is smaller than the area */
col = 0;
num_pixels = dw * dh;
dest = target + area->x + (area->width - dw) / 2 +
(target_w * (area->y + (area->height - dh) / 2));
while (num_pixels-- > 0) {
- guchar alpha, r, g, b, bgr, bgg, bgb;
+ guchar a, r, g, b, bgr, bgg, bgb;
/* apply the rgba's opacity as well */
- alpha = ((*source >> RrDefaultAlphaOffset) * rgba->alpha) >> 8;
+ a = ((*source >> RrDefaultAlphaOffset) * alpha) >> 8;
r = *source >> RrDefaultRedOffset;
g = *source >> RrDefaultGreenOffset;
b = *source >> RrDefaultBlueOffset;
bgg = *dest >> RrDefaultGreenOffset;
bgb = *dest >> RrDefaultBlueOffset;
- r = bgr + (((r - bgr) * alpha) >> 8);
- g = bgg + (((g - bgg) * alpha) >> 8);
- b = bgb + (((b - bgb) * alpha) >> 8);
+ r = bgr + (((r - bgr) * a) >> 8);
+ g = bgg + (((g - bgg) * a) >> 8);
+ b = bgb + (((b - bgb) * a) >> 8);
*dest = ((r << RrDefaultRedOffset) |
(g << RrDefaultGreenOffset) |
}
}
}
+
+/*! Draw an RGBA texture into a target pixel buffer. */
+void RrImageDrawRGBA(RrPixel32 *target, RrTextureRGBA *rgba,
+ gint target_w, gint target_h,
+ RrRect *area)
+{
+ RrImagePic *scaled;
+
+ scaled = ResizeImage(rgba->data, rgba->width, rgba->height,
+ area->width, area->height);
+
+ if (scaled) {
+#ifdef DEBUG
+ g_warning("Scaling an RGBA! You should avoid this and just make "
+ "it the right size yourself!");
+#endif
+ DrawRGBA(target, target_w, target_h,
+ scaled->data, scaled->width, scaled->height,
+ rgba->alpha, area);
+ RrImagePicFree(scaled);
+ }
+ else
+ DrawRGBA(target, target_w, target_h,
+ rgba->data, rgba->width, rgba->height,
+ rgba->alpha, area);
+}
+
+/*! Create a new RrImage, which is linked to an image cache */
+RrImage* RrImageNew(RrImageCache *cache)
+{
+ RrImage *self;
+
+ g_assert(cache != NULL);
+
+ self = g_new0(RrImage, 1);
+ self->ref = 1;
+ self->cache = cache;
+ return self;
+}
+
+void RrImageRef(RrImage *self)
+{
+ ++self->ref;
+}
+
+void RrImageUnref(RrImage *self)
+{
+ if (self && --self->ref == 0) {
+#ifdef DEBUG
+ g_debug("Refcount to 0, removing ALL pictures from the cache:\n "
+ "Image 0x%x", (guint)self);
+#endif
+ while (self->n_original > 0)
+ RemovePicture(self, &self->original, 0, &self->n_original);
+ while (self->n_resized > 0)
+ RemovePicture(self, &self->resized, 0, &self->n_resized);
+ g_free(self);
+ }
+}
+
+/*! Add a new picture with the given RGBA pixel data and dimensions into the
+ RrImage. This adds an "original" picture to the image.
+*/
+void RrImageAddPicture(RrImage *self, RrPixel32 *data, gint w, gint h)
+{
+ gint i;
+ RrImagePic *pic;
+
+ /* make sure we don't already have this size.. */
+ for (i = 0; i < self->n_original; ++i)
+ if (self->original[i]->width == w && self->original[i]->height == h) {
+#ifdef DEBUG
+ g_debug("Found duplicate ORIGINAL image:\n "
+ "Image 0x%x, w %d h %d", (guint)self, w, h);
+#endif
+ return;
+ }
+
+ /* remove any resized pictures of this same size */
+ for (i = 0; i < self->n_resized; ++i)
+ if (self->resized[i]->width == w || self->resized[i]->height == h) {
+ RemovePicture(self, &self->resized, i, &self->n_resized);
+ break;
+ }
+
+ /* add the new picture */
+ pic = g_new(RrImagePic, 1);
+ RrImagePicInit(pic, w, h, g_memdup(data, w*h*sizeof(RrPixel32)));
+ AddPicture(self, &self->original, &self->n_original, pic);
+}
+
+/*! Remove the picture from the RrImage which has the given dimensions. This
+ removes an "original" picture from the image.
+*/
+void RrImageRemovePicture(RrImage *self, gint w, gint h)
+{
+ gint i;
+
+ /* remove any resized pictures of this same size */
+ for (i = 0; i < self->n_original; ++i)
+ if (self->original[i]->width == w && self->original[i]->height == h) {
+ RemovePicture(self, &self->original, i, &self->n_original);
+ break;
+ }
+}
+
+/*! Draw an RrImage texture into a target pixel buffer. If the RrImage does
+ not contain a picture of the appropriate size, then one of its "original"
+ pictures will be resized and used (and stored in the RrImage as a "resized"
+ picture).
+ */
+void RrImageDrawImage(RrPixel32 *target, RrTextureImage *img,
+ gint target_w, gint target_h,
+ RrRect *area)
+{
+ gint i, min_diff, min_i, min_aspect_diff, min_aspect_i;
+ RrImage *self;
+ RrImagePic *pic;
+ gboolean free_pic;
+
+ self = img->image;
+ pic = NULL;
+ free_pic = FALSE;
+
+ /* is there an original of this size? (only w or h has to be right cuz
+ we maintain aspect ratios) */
+ for (i = 0; i < self->n_original; ++i)
+ if (self->original[i]->width == area->width ||
+ self->original[i]->height == area->height)
+ {
+ pic = self->original[i];
+ break;
+ }
+
+ /* is there a resize of this size? */
+ for (i = 0; i < self->n_resized; ++i)
+ if (self->resized[i]->width == area->width ||
+ self->resized[i]->height == area->height)
+ {
+ gint j;
+ RrImagePic *saved;
+
+ /* save the selected one */
+ saved = self->resized[i];
+
+ /* shift all the others down */
+ for (j = i; j > 0; --j)
+ self->resized[j] = self->resized[j-1];
+
+ /* and move the selected one to the top of the list */
+ self->resized[0] = saved;
+
+ pic = self->resized[0];
+ break;
+ }
+
+ if (!pic) {
+ gdouble aspect;
+
+ /* find an original with a close size */
+ min_diff = min_aspect_diff = -1;
+ min_i = min_aspect_i = 0;
+ aspect = ((gdouble)area->width) / area->height;
+ for (i = 0; i < self->n_original; ++i) {
+ gint diff;
+ gint wdiff, hdiff;
+ gdouble myasp;
+
+ /* our size difference metric.. */
+ wdiff = self->original[i]->width - area->width;
+ hdiff = self->original[i]->height - area->height;
+ diff = (wdiff * wdiff) + (hdiff * hdiff);
+
+ /* find the smallest difference */
+ if (min_diff < 0 || diff < min_diff) {
+ min_diff = diff;
+ min_i = i;
+ }
+ /* and also find the smallest difference with the same aspect
+ ratio (and prefer this one) */
+ myasp = ((gdouble)self->original[i]->width) /
+ self->original[i]->height;
+ if (ABS(aspect - myasp) < 0.0000001 &&
+ (min_aspect_diff < 0 || diff < min_aspect_diff))
+ {
+ min_aspect_diff = diff;
+ min_aspect_i = i;
+ }
+ }
+
+ /* use the aspect ratio correct source if there is one */
+ if (min_aspect_i >= 0)
+ min_i = min_aspect_i;
+
+ /* resize the original to the given area */
+ pic = ResizeImage(self->original[min_i]->data,
+ self->original[min_i]->width,
+ self->original[min_i]->height,
+ area->width, area->height);
+
+ /* add the resized image to the image, as the first in the resized
+ list */
+ if (self->n_resized >= self->cache->max_resized_saved)
+ /* remove the last one (last used one) */
+ RemovePicture(self, &self->resized, self->n_resized - 1,
+ &self->n_resized);
+ if (self->cache->max_resized_saved)
+ /* add it to the top of the resized list */
+ AddPicture(self, &self->resized, &self->n_resized, pic);
+ else
+ free_pic = TRUE; /* don't leak mem! */
+ }
+
+ g_assert(pic != NULL);
+
+ DrawRGBA(target, target_w, target_h,
+ pic->data, pic->width, pic->height,
+ img->alpha, area);
+ if (free_pic)
+ RrImagePicFree(pic);
+}
projects / mikachu / openbox.git / blobdiff