--- /dev/null
+/* GDK - The GIMP Drawing Kit
+ * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+/* For more information on GdkRgb, see http://www.levien.com/gdkrgb/
+
+ Raph Levien <raph@acm.org>
+ */
+
+#include <math.h>
+#include <stdio.h>
+
+#include <gtk/gtk.h>
+
+#define ENABLE_GRAYSCALE
+
+#include <gdk/gdkprivate.h>
+#include "gdkrgb.h"
+
+typedef struct _GdkRgbInfo GdkRgbInfo;
+
+typedef void (*GdkRgbConvFunc) (GdkImage *image,
+ gint x0, gint y0,
+ gint width, gint height,
+ guchar *buf, int rowstride,
+ gint x_align, gint y_align,
+ GdkRgbCmap *cmap);
+
+/* Some of these fields should go, as they're not being used at all.
+ Globals should generally migrate into here - it's very likely that
+ we'll want to run more than one GdkRgbInfo context at the same time
+ (i.e. some but not all windows have privately installed
+ colormaps). */
+
+struct _GdkRgbInfo
+{
+ GdkVisual *visual;
+ GdkColormap *cmap;
+
+ gulong *color_pixels;
+ gulong *gray_pixels;
+ gulong *reserved_pixels;
+
+ gulong *lookup_red;
+ gulong *lookup_green;
+ gulong *lookup_blue;
+
+ GtkDitherInfo *dither_red;
+ GtkDitherInfo *dither_green;
+ GtkDitherInfo *dither_blue;
+ GtkDitherInfo *dither_gray;
+ guchar ***dither_matrix;
+
+ guint nred_shades;
+ guint ngreen_shades;
+ guint nblue_shades;
+ guint ngray_shades;
+ guint nreserved;
+
+ guint bpp;
+ gint cmap_alloced;
+ gdouble gamma;
+
+ /* Generally, the stage buffer is used to convert 32bit RGB, gray,
+ and indexed images into 24 bit packed RGB. */
+ guchar *stage_buf;
+
+ GdkRgbCmap *gray_cmap;
+
+ gboolean dith_default;
+
+ /* Convert functions */
+ GdkRgbConvFunc conv;
+ GdkRgbConvFunc conv_d;
+
+ GdkRgbConvFunc conv_32;
+ GdkRgbConvFunc conv_32_d;
+
+ GdkRgbConvFunc conv_gray;
+ GdkRgbConvFunc conv_gray_d;
+
+ GdkRgbConvFunc conv_indexed;
+ GdkRgbConvFunc conv_indexed_d;
+};
+
+static gboolean gdk_rgb_install_cmap = FALSE;
+static gint gdk_rgb_min_colors = 5 * 5 * 5;
+static gboolean gdk_rgb_verbose = FALSE;
+
+#define IMAGE_WIDTH 256
+#define STAGE_ROWSTRIDE (IMAGE_WIDTH * 3)
+#define IMAGE_HEIGHT 64
+#define N_IMAGES 6
+
+static GdkRgbInfo *image_info = NULL;
+static GdkImage *static_image[N_IMAGES];
+static gint static_image_idx;
+
+static guchar *colorcube;
+static guchar *colorcube_d;
+
+static gint
+gdk_rgb_cmap_fail (const char *msg, GdkColormap *cmap, gulong *pixels)
+{
+ gulong free_pixels[256];
+ gint n_free;
+ gint i;
+
+#ifdef VERBOSE
+ g_print ("%s", msg);
+#endif
+ n_free = 0;
+ for (i = 0; i < 256; i++)
+ if (pixels[i] < 256)
+ free_pixels[n_free++] = pixels[i];
+ if (n_free)
+ gdk_colors_free (cmap, free_pixels, n_free, 0);
+ return 0;
+}
+
+static void
+gdk_rgb_make_colorcube (gulong *pixels, gint nr, gint ng, gint nb)
+{
+ guchar rt[16], gt[16], bt[16];
+ gint i;
+
+ colorcube = g_new (guchar, 4096);
+ for (i = 0; i < 16; i++)
+ {
+ rt[i] = ng * nb * ((i * 17 * (nr - 1) + 128) >> 8);
+ gt[i] = nb * ((i * 17 * (ng - 1) + 128) >> 8);
+ bt[i] = ((i * 17 * (nb - 1) + 128) >> 8);
+ }
+
+ for (i = 0; i < 4096; i++)
+ {
+ colorcube[i] = pixels[rt[i >> 8] + gt[(i >> 4) & 0x0f] + bt[i & 0x0f]];
+#ifdef VERBOSE
+ g_print ("%03x %02x %x %x %x\n", i, colorcube[i], rt[i >> 8], gt[(i >> 4) & 0x0f], bt[i & 0x0f]);
+#endif
+ }
+}
+
+/* this is the colorcube suitable for dithering */
+static void
+gdk_rgb_make_colorcube_d (gulong *pixels, gint nr, gint ng, gint nb)
+{
+ gint r, g, b;
+ gint i;
+
+ colorcube_d = g_new (guchar, 512);
+ for (i = 0; i < 512; i++)
+ {
+ r = MIN (nr - 1, i >> 6);
+ g = MIN (ng - 1, (i >> 3) & 7);
+ b = MIN (nb - 1, i & 7);
+ colorcube_d[i] = pixels[(r * ng + g) * nb + b];
+ }
+}
+
+/* Try installing a color cube of the specified size.
+ Make the colorcube and return TRUE on success */
+static gint
+gdk_rgb_try_colormap (gint nr, gint ng, gint nb)
+{
+ gint r, g, b;
+ gint ri, gi, bi;
+ gint r0, g0, b0;
+ GdkColormap *cmap;
+ GdkColor color;
+ gulong pixels[256];
+ gulong junk[256];
+ gint i;
+ gint d2;
+ gint colors_needed;
+ gint idx;
+ gint best[256];
+
+ if (nr * ng * nb < gdk_rgb_min_colors)
+ return FALSE;
+
+ if (image_info->cmap_alloced)
+ cmap = image_info->cmap;
+ else
+ cmap = gdk_colormap_get_system ();
+
+ colors_needed = nr * ng * nb;
+ for (i = 0; i < 256; i++)
+ {
+ best[i] = 192;
+ pixels[i] = 256;
+ }
+
+#ifndef GAMMA
+ if (!gdk_rgb_install_cmap)
+ /* find color cube colors that are already present */
+ for (i = 0; i < MIN (256, cmap->size); i++)
+ {
+ r = cmap->colors[i].red >> 8;
+ g = cmap->colors[i].green >> 8;
+ b = cmap->colors[i].blue >> 8;
+ ri = (r * (nr - 1) + 128) >> 8;
+ gi = (g * (ng - 1) + 128) >> 8;
+ bi = (b * (nb - 1) + 128) >> 8;
+ r0 = ri * 255 / (nr - 1);
+ g0 = gi * 255 / (ng - 1);
+ b0 = bi * 255 / (nb - 1);
+ idx = ((ri * nr) + gi) * nb + bi;
+ d2 = (r - r0) * (r - r0) + (g - g0) * (g - g0) + (b - b0) * (b - b0);
+ if (d2 < best[idx]) {
+ if (pixels[idx] < 256)
+ gdk_colors_free (cmap, pixels + idx, 1, 0);
+ else
+ colors_needed--;
+ color = cmap->colors[i];
+ if (!gdk_color_alloc (cmap, &color))
+ return gdk_rgb_cmap_fail ("error allocating system color\n",
+ cmap, pixels);
+ pixels[idx] = color.pixel; /* which is almost certainly i */
+ best[idx] = d2;
+ }
+ }
+#endif
+
+ if (colors_needed)
+ {
+ if (!gdk_colors_alloc (cmap, 0, NULL, 0, junk, colors_needed))
+ {
+ char tmp_str[80];
+
+ sprintf (tmp_str,
+ "%d %d %d colormap failed (in gdk_colors_alloc)\n",
+ nr, ng, nb);
+ return gdk_rgb_cmap_fail (tmp_str, cmap, pixels);
+ }
+
+ gdk_colors_free (cmap, junk, colors_needed, 0);
+ }
+
+ for (r = 0, i = 0; r < nr; r++)
+ for (g = 0; g < ng; g++)
+ for (b = 0; b < nb; b++, i++)
+ {
+ if (pixels[i] == 256)
+ {
+ color.red = r * 65535 / (nr - 1);
+ color.green = g * 65535 / (ng - 1);
+ color.blue = b * 65535 / (nb - 1);
+
+#ifdef GAMMA
+ color.red = 65535 * pow (color.red / 65535.0, 0.5);
+ color.green = 65535 * pow (color.green / 65535.0, 0.5);
+ color.blue = 65535 * pow (color.blue / 65535.0, 0.5);
+#endif
+
+ if (!gdk_color_alloc (cmap, &color))
+ {
+ char tmp_str[80];
+
+ sprintf (tmp_str, "%d %d %d colormap failed\n",
+ nr, ng, nb);
+ return gdk_rgb_cmap_fail (tmp_str,
+ cmap, pixels);
+ }
+ pixels[i] = color.pixel;
+ }
+#ifdef VERBOSE
+ g_print ("%d: %lx\n", i, pixels[i]);
+#endif
+ }
+
+ image_info->nred_shades = nr;
+ image_info->ngreen_shades = ng;
+ image_info->nblue_shades = nb;
+ gdk_rgb_make_colorcube (pixels, nr, ng, nb);
+ gdk_rgb_make_colorcube_d (pixels, nr, ng, nb);
+ return TRUE;
+}
+
+/* Return TRUE on success. */
+static gboolean
+gdk_rgb_do_colormaps (void)
+{
+ const gint sizes[][3] = {
+ /* { 6, 7, 6 }, */
+ { 6, 6, 6 },
+ { 6, 6, 5 },
+ { 6, 6, 4 },
+ { 5, 5, 5 },
+ { 5, 5, 4 },
+ { 4, 4, 4 },
+ { 4, 4, 3 },
+ { 3, 3, 3 },
+ { 2, 2, 2 }
+ };
+ const gint n_sizes = sizeof(sizes) / (3 * sizeof(gint));
+ gint i;
+
+ for (i = 0; i < n_sizes; i++)
+ if (gdk_rgb_try_colormap (sizes[i][0], sizes[i][1], sizes[i][2]))
+ return TRUE;
+ return FALSE;
+}
+
+void
+gdk_rgb_set_verbose (gboolean verbose)
+{
+ gdk_rgb_verbose = verbose;
+}
+
+void
+gdk_rgb_set_install (gboolean install)
+{
+ gdk_rgb_install_cmap = install;
+}
+
+void
+gdk_rgb_set_min_colors (gint min_colors)
+{
+ gdk_rgb_min_colors = min_colors;
+}
+
+/* Return a "score" based on the following criteria (in hex):
+
+ x000 is the quality - 1 is 1bpp, 2 is 4bpp,
+ 4 is 8bpp,
+ 7 is 15bpp truecolor, 8 is 16bpp truecolor,
+ 9 is 24bpp truecolor.
+ 0x00 is the speed - 1 is the normal case,
+ 2 means faster than normal
+ 00x0 gets a point for being the system visual
+ 000x gets a point for being pseudocolor
+
+ A caveat: in the 8bpp modes, being the system visual seems to be
+ quite important. Thus, all of the 8bpp modes should be ranked at
+ the same speed.
+*/
+static guint32
+gdk_rgb_score_visual (GdkVisual *visual)
+{
+ guint32 quality, speed, sys, pseudo;
+ gchar* visual_names[] =
+ {
+ "static gray",
+ "grayscale",
+ "static color",
+ "pseudo color",
+ "true color",
+ "direct color",
+ };
+
+
+ quality = 0;
+ speed = 1;
+ sys = 0;
+ if (visual->type == GDK_VISUAL_TRUE_COLOR ||
+ visual->type == GDK_VISUAL_DIRECT_COLOR)
+ {
+ if (visual->depth == 24)
+ {
+ quality = 9;
+ /* Should test for MSB visual here, and set speed if so. */
+ }
+ else if (visual->depth == 16)
+ quality = 8;
+ else if (visual->depth == 15)
+ quality = 7;
+ else if (visual->depth == 8)
+ quality = 4;
+ }
+ else if (visual->type == GDK_VISUAL_PSEUDO_COLOR)
+ {
+ if (visual->depth == 8)
+ quality = 4;
+ }
+ else if (visual->type == GDK_VISUAL_STATIC_GRAY
+#ifdef ENABLE_GRAYSCALE
+ || visual->type == GDK_VISUAL_GRAYSCALE
+#endif
+ )
+ {
+ if (visual->depth == 8)
+ quality = 4;
+ else if (visual->depth == 4)
+ quality = 2;
+ else if (visual->depth == 1)
+ quality = 1;
+ }
+
+ if (quality == 0)
+ return 0;
+
+ sys = (visual == gdk_visual_get_system ());
+
+ pseudo = (visual->type == GDK_VISUAL_PSEUDO_COLOR);
+
+ if (gdk_rgb_verbose)
+ g_print ("Visual 0x%x, type = %s, depth = %d, %x:%x:%x%s; score=%x\n",
+ (gint)(((GdkVisualPrivate *)visual)->xvisual->visualid),
+ visual_names[visual->type],
+ visual->depth,
+ visual->red_mask,
+ visual->green_mask,
+ visual->blue_mask,
+ sys ? " (system)" : "",
+ (quality << 12) | (speed << 8) | (sys << 4) | pseudo);
+
+ return (quality << 12) | (speed << 8) | (sys << 4) | pseudo;
+}
+
+static void
+gdk_rgb_choose_visual (void)
+{
+ GList *visuals;
+ guint32 score, best_score;
+ GdkVisual *visual, *best_visual;
+
+ visuals = gdk_list_visuals ();
+
+ best_visual = visuals->data;
+ best_score = gdk_rgb_score_visual (best_visual);
+ visuals = visuals->next;
+ while (visuals)
+ {
+ visual = visuals->data;
+ score = gdk_rgb_score_visual (visual);
+ if (score > best_score)
+ {
+ best_score = score;
+ best_visual = visual;
+ }
+ visuals = visuals->next;
+ }
+
+ image_info->visual = best_visual;
+}
+
+static void gdk_rgb_select_conv (GdkImage *image);
+
+static void
+gdk_rgb_set_gray_cmap (GdkColormap *cmap)
+{
+ gint i;
+ GdkColor color;
+ gint status;
+ gulong pixels[256];
+ gint r, g, b, gray;
+
+ for (i = 0; i < 256; i++)
+ {
+ color.pixel = i;
+ color.red = i * 257;
+ color.green = i * 257;
+ color.blue = i * 257;
+ status = gdk_color_alloc (cmap, &color);
+ pixels[i] = color.pixel;
+#ifdef VERBOSE
+ g_print ("allocating pixel %d, %x %x %x, result %d\n",
+ color.pixel, color.red, color.green, color.blue, status);
+#endif
+ }
+
+ /* Now, we make fake colorcubes - we ultimately just use the pseudocolor
+ methods. */
+
+ colorcube = g_new (guchar, 4096);
+
+ for (i = 0; i < 4096; i++)
+ {
+ r = (i >> 4) & 0xf0;
+ r = r | r >> 4;
+ g = i & 0xf0;
+ g = g | g >> 4;
+ b = (i << 4 & 0xf0);
+ b = b | b >> 4;
+ gray = (g + ((r + b) >> 1)) >> 1;
+ colorcube[i] = pixels[gray];
+ }
+}
+
+void
+gdk_rgb_init (void)
+{
+ gint i;
+ gint byte_order[1] = { 1 };
+
+ /* check endian sanity */
+#ifdef WORDS_BIGENDIAN
+ if (((char *)byte_order)[0] == 1)
+ g_error ("gtk_rgb_init: WORDS_BIGENDIAN is defined, but this is a little endian machine.\n\n");
+#else
+ if (((char *)byte_order)[0] != 1)
+ g_error ("gtk_rgb_init: WORDS_BIGENDIAN is not defined, but this is a little endian machine.\n\n");
+#endif
+
+ if (image_info == NULL)
+ {
+ image_info = g_new0 (GdkRgbInfo, 1);
+
+ image_info->visual = NULL;
+ image_info->cmap = NULL;
+
+ image_info->color_pixels = NULL;
+ image_info->gray_pixels = NULL;
+ image_info->reserved_pixels = NULL;
+
+ image_info->lookup_red = NULL;
+ image_info->lookup_green = NULL;
+ image_info->lookup_blue = NULL;
+
+ image_info->dither_red = NULL;
+ image_info->dither_green = NULL;
+ image_info->dither_blue = NULL;
+ image_info->dither_gray = NULL;
+ image_info->dither_matrix = NULL;
+
+ image_info->nred_shades = 6;
+ image_info->ngreen_shades = 6;
+ image_info->nblue_shades = 4;
+ image_info->ngray_shades = 24;
+ image_info->nreserved = 0;
+
+ image_info->bpp = 0;
+ image_info->cmap_alloced = FALSE;
+ image_info->gamma = 1.0;
+
+ image_info->stage_buf = NULL;
+
+ gdk_rgb_choose_visual ();
+
+ if (image_info->visual->type == GDK_VISUAL_PSEUDO_COLOR)
+ {
+ if (gdk_rgb_install_cmap ||
+ image_info->visual != gdk_visual_get_system ())
+ {
+ image_info->cmap = gdk_colormap_new (image_info->visual, FALSE);
+ image_info->cmap_alloced = TRUE;
+ }
+ if (!gdk_rgb_do_colormaps ())
+ {
+ image_info->cmap = gdk_colormap_new (image_info->visual, FALSE);
+ image_info->cmap_alloced = TRUE;
+ gdk_rgb_do_colormaps ();
+ }
+ if (gdk_rgb_verbose)
+ g_print ("color cube: %d x %d x %d\n",
+ image_info->nred_shades,
+ image_info->ngreen_shades,
+ image_info->nblue_shades);
+
+ if (!image_info->cmap_alloced)
+ image_info->cmap = gdk_colormap_get_system ();
+ }
+#ifdef ENABLE_GRAYSCALE
+ else if (image_info->visual->type == GDK_VISUAL_GRAYSCALE)
+ {
+ image_info->cmap = gdk_colormap_new (image_info->visual, FALSE);
+ gdk_rgb_set_gray_cmap (image_info->cmap);
+ image_info->cmap_alloced = TRUE;
+ }
+#endif
+ else
+ {
+ /* Always install colormap in direct color. */
+ if (image_info->visual->type != GDK_VISUAL_DIRECT_COLOR &&
+ image_info->visual == gdk_visual_get_system ())
+ image_info->cmap = gdk_colormap_get_system ();
+ else
+ {
+ image_info->cmap = gdk_colormap_new (image_info->visual, FALSE);
+ image_info->cmap_alloced = TRUE;
+ }
+ }
+
+ for (i = 0; i < N_IMAGES; i++)
+ static_image[i] = gdk_image_new (GDK_IMAGE_FASTEST,
+ image_info->visual,
+ IMAGE_WIDTH, IMAGE_HEIGHT);
+
+ image_info->bpp = static_image[0]->bpp;
+
+ gdk_rgb_select_conv (static_image[0]);
+
+ }
+}
+
+/* convert an rgb value into an X pixel code */
+gulong
+gdk_rgb_xpixel_from_rgb (guint32 rgb)
+{
+ gulong pixel;
+
+ if (image_info->visual->type == GDK_VISUAL_PSEUDO_COLOR)
+ pixel = colorcube[((rgb & 0xf00000) >> 12) |
+ ((rgb & 0xf000) >> 8) |
+ ((rgb & 0xf0) >> 4)];
+ else
+ {
+#ifdef VERBOSE
+ g_print ("shift, prec: r %d %d g %d %d b %d %d\n",
+ image_info->visual->red_shift,
+ image_info->visual->red_prec,
+ image_info->visual->green_shift,
+ image_info->visual->green_prec,
+ image_info->visual->blue_shift,
+ image_info->visual->blue_prec);
+#endif
+
+ pixel = (((((rgb & 0xff0000) >> 16) >>
+ (8 - image_info->visual->red_prec)) <<
+ image_info->visual->red_shift) +
+ ((((rgb & 0xff00) >> 8) >>
+ (8 - image_info->visual->green_prec)) <<
+ image_info->visual->green_shift) +
+ (((rgb & 0xff) >>
+ (8 - image_info->visual->blue_prec)) <<
+ image_info->visual->blue_shift));
+
+ ;
+ }
+
+ return pixel;
+}
+
+void
+gdk_rgb_gc_set_foreground (GdkGC *gc, guint32 rgb)
+{
+ GdkColor color;
+
+ color.pixel = gdk_rgb_xpixel_from_rgb (rgb);
+ gdk_gc_set_foreground (gc, &color);
+}
+
+void
+gdk_rgb_gc_set_background (GdkGC *gc, guint32 rgb)
+{
+ GdkColor color;
+
+ color.pixel = gdk_rgb_xpixel_from_rgb (rgb);
+ gdk_gc_set_background (gc, &color);
+}
+
+#ifndef WORDS_BIGENDIAN
+#define HAIRY_CONVERT_8
+#endif
+
+#ifdef HAIRY_CONVERT_8
+static void
+gdk_rgb_convert_8 (GdkImage *image,
+ gint x0, gint y0, gint width, gint height,
+ guchar *buf, int rowstride,
+ gint x_align, gint y_align, GdkRgbCmap *cmap)
+{
+ int x, y;
+ gint bpl;
+ guchar *obuf, *obptr;
+ guchar *bptr, *bp2;
+ gint r, g, b;
+
+ bptr = buf;
+ bpl = image->bpl;
+ obuf = ((guchar *)image->mem) + y0 * bpl + x0;
+ for (y = 0; y < height; y++)
+ {
+ bp2 = bptr;
+ obptr = obuf;
+ if (width < 8 || (((unsigned long)obuf | (unsigned long) bp2) & 3))
+ {
+ for (x = 0; x < width; x++)
+ {
+ r = *bp2++;
+ g = *bp2++;
+ b = *bp2++;
+ obptr[0] = colorcube[((r & 0xf0) << 4) |
+ (g & 0xf0) |
+ (b >> 4)];
+ obptr++;
+ }
+ }
+ else
+ {
+ for (x = 0; x < width - 3; x += 4)
+ {
+ guint32 r1b0g0r0;
+ guint32 g2r2b1g1;
+ guint32 b3g3r3b2;
+
+ r1b0g0r0 = ((guint32 *)bp2)[0];
+ g2r2b1g1 = ((guint32 *)bp2)[1];
+ b3g3r3b2 = ((guint32 *)bp2)[2];
+ ((guint32 *)obptr)[0] =
+ colorcube[((r1b0g0r0 & 0xf0) << 4) |
+ ((r1b0g0r0 & 0xf000) >> 8) |
+ ((r1b0g0r0 & 0xf00000) >> 20)] |
+ (colorcube[((r1b0g0r0 & 0xf0000000) >> 20) |
+ (g2r2b1g1 & 0xf0) |
+ ((g2r2b1g1 & 0xf000) >> 12)] << 8) |
+ (colorcube[((g2r2b1g1 & 0xf00000) >> 12) |
+ ((g2r2b1g1 & 0xf0000000) >> 24) |
+ ((b3g3r3b2 & 0xf0) >> 4)] << 16) |
+ (colorcube[((b3g3r3b2 & 0xf000) >> 4) |
+ ((b3g3r3b2 & 0xf00000) >> 16) |
+ (b3g3r3b2 >> 28)] << 24);
+ bp2 += 12;
+ obptr += 4;
+ }
+ for (; x < width; x++)
+ {
+ r = *bp2++;
+ g = *bp2++;
+ b = *bp2++;
+ obptr[0] = colorcube[((r & 0xf0) << 4) |
+ (g & 0xf0) |
+ (b >> 4)];
+ obptr++;
+ }
+ }
+ bptr += rowstride;
+ obuf += bpl;
+ }
+}
+#else
+static void
+gdk_rgb_convert_8 (GdkImage *image,
+ gint x0, gint y0, gint width, gint height,
+ guchar *buf, int rowstride,
+ gint x_align, gint y_align, GdkRgbCmap *cmap)
+{
+ int x, y;
+ gint bpl;
+ guchar *obuf, *obptr;
+ guchar *bptr, *bp2;
+ gint r, g, b;
+
+ bptr = buf;
+ bpl = image->bpl;
+ obuf = ((guchar *)image->mem) + y0 * bpl + x0;
+ for (y = 0; y < height; y++)
+ {
+ bp2 = bptr;
+ obptr = obuf;
+ for (x = 0; x < width; x++)
+ {
+ r = *bp2++;
+ g = *bp2++;
+ b = *bp2++;
+ obptr[0] = colorcube[((r & 0xf0) << 4) |
+ (g & 0xf0) |
+ (b >> 4)];
+ obptr++;
+ }
+ bptr += rowstride;
+ obuf += bpl;
+ }
+}
+#endif
+
+#if 1
+
+/* This dither table was generated by Raph Levien using patented
+ technology (US Patent 5,276,535). The dither table itself is in the
+ public domain. */
+
+#define DM_WIDTH 128
+#define DM_HEIGHT 128
+static guchar DM[128][128] =
+{
+ { 0, 41, 23, 5, 17, 39, 7, 15, 62, 23, 40, 51, 31, 47, 9, 32, 52, 27, 57, 25, 6, 61, 27, 52, 37, 7, 40, 63, 18, 36, 10, 42, 25, 62, 45, 34, 20, 42, 37, 14, 35, 29, 50, 10, 61, 2, 40, 8, 37, 12, 58, 22, 5, 41, 10, 39, 0, 60, 11, 46, 2, 55, 38, 17, 36, 59, 13, 54, 37, 56, 8, 29, 16, 13, 63, 22, 41, 55, 7, 20, 49, 14, 23, 55, 37, 23, 19, 36, 15, 49, 23, 63, 30, 14, 38, 27, 53, 13, 22, 41, 19, 31, 7, 19, 50, 30, 49, 16, 3, 32, 56, 40, 29, 34, 8, 48, 19, 45, 4, 51, 12, 46, 35, 49, 16, 42, 12, 62 },
+ { 30, 57, 36, 54, 47, 34, 52, 27, 43, 4, 28, 7, 17, 36, 62, 13, 44, 7, 18, 48, 33, 21, 44, 14, 30, 47, 12, 33, 5, 55, 31, 58, 13, 30, 4, 17, 52, 10, 60, 26, 46, 0, 39, 27, 42, 22, 47, 25, 60, 32, 9, 38, 48, 17, 59, 30, 49, 18, 34, 25, 51, 19, 5, 48, 21, 8, 28, 46, 1, 32, 41, 19, 54, 47, 37, 18, 28, 11, 44, 30, 39, 56, 2, 33, 8, 42, 61, 28, 58, 8, 46, 9, 41, 4, 58, 7, 21, 48, 59, 10, 52, 14, 42, 57, 12, 25, 7, 53, 42, 24, 11, 50, 17, 59, 42, 2, 36, 60, 32, 17, 63, 29, 21, 7, 59, 32, 24, 39 },
+ { 22, 8, 16, 32, 3, 25, 13, 57, 18, 45, 58, 39, 55, 20, 5, 42, 23, 34, 63, 1, 51, 10, 58, 4, 60, 23, 53, 27, 44, 21, 3, 48, 8, 50, 43, 54, 27, 32, 5, 55, 21, 58, 12, 53, 6, 36, 14, 50, 17, 29, 53, 15, 24, 52, 7, 36, 13, 42, 4, 53, 9, 35, 61, 26, 56, 32, 49, 15, 62, 23, 6, 60, 2, 31, 4, 48, 58, 38, 15, 61, 5, 25, 47, 28, 50, 15, 7, 40, 3, 32, 33, 52, 25, 50, 35, 42, 61, 3, 28, 36, 23, 63, 4, 33, 46, 62, 36, 23, 60, 6, 54, 28, 4, 37, 23, 55, 25, 8, 42, 54, 14, 6, 56, 38, 19, 52, 4, 46 },
+ { 48, 53, 43, 12, 45, 63, 30, 37, 9, 34, 21, 1, 25, 47, 29, 58, 3, 54, 15, 39, 29, 17, 38, 35, 20, 43, 1, 49, 15, 59, 29, 39, 22, 35, 16, 23, 1, 47, 39, 18, 8, 44, 25, 31, 57, 19, 63, 4, 45, 3, 42, 61, 1, 31, 45, 20, 57, 29, 62, 21, 32, 41, 14, 44, 3, 39, 5, 34, 10, 43, 51, 35, 23, 52, 40, 10, 21, 1, 53, 18, 51, 43, 12, 62, 18, 54, 26, 51, 20, 57, 14, 1, 62, 16, 11, 18, 32, 39, 17, 44, 1, 48, 26, 37, 18, 2, 51, 14, 28, 45, 35, 18, 57, 13, 47, 11, 51, 20, 2, 39, 31, 47, 25, 1, 50, 11, 60, 7 },
+ { 18, 28, 1, 56, 21, 10, 51, 2, 46, 54, 14, 61, 11, 50, 13, 38, 19, 31, 45, 9, 55, 24, 47, 5, 54, 9, 62, 11, 35, 8, 51, 14, 57, 6, 63, 40, 58, 14, 51, 28, 62, 34, 15, 48, 1, 41, 30, 35, 55, 21, 34, 11, 49, 37, 8, 52, 4, 23, 15, 43, 1, 58, 11, 23, 53, 16, 55, 26, 58, 18, 27, 12, 45, 14, 25, 63, 42, 33, 27, 35, 9, 31, 21, 38, 1, 44, 34, 12, 48, 38, 21, 44, 29, 47, 26, 53, 1, 46, 54, 8, 59, 29, 11, 55, 22, 41, 33, 20, 39, 1, 48, 9, 44, 32, 5, 62, 29, 44, 57, 23, 10, 58, 34, 43, 15, 37, 26, 33 },
+ { 51, 38, 59, 24, 35, 42, 19, 60, 5, 32, 41, 26, 43, 33, 7, 53, 48, 11, 59, 23, 42, 2, 61, 30, 16, 40, 32, 24, 56, 41, 19, 33, 37, 26, 47, 9, 31, 22, 2, 45, 9, 54, 4, 37, 21, 52, 11, 23, 7, 57, 16, 25, 55, 18, 63, 27, 46, 39, 56, 10, 50, 37, 29, 47, 19, 63, 24, 9, 46, 2, 39, 60, 9, 57, 30, 7, 49, 11, 59, 3, 45, 57, 5, 60, 29, 22, 5, 60, 30, 9, 59, 18, 40, 6, 57, 36, 30, 12, 24, 34, 15, 40, 52, 6, 49, 9, 58, 4, 63, 12, 26, 61, 22, 53, 38, 16, 35, 14, 28, 50, 42, 17, 5, 28, 62, 20, 54, 12 },
+ { 26, 6, 31, 15, 49, 6, 38, 27, 22, 49, 16, 56, 2, 62, 30, 21, 0, 36, 28, 6, 49, 32, 13, 52, 26, 50, 19, 46, 3, 26, 62, 0, 53, 12, 29, 3, 53, 41, 60, 24, 38, 13, 58, 16, 43, 9, 59, 39, 46, 28, 44, 40, 2, 33, 13, 41, 16, 6, 47, 31, 26, 17, 57, 6, 38, 0, 42, 36, 29, 52, 20, 31, 48, 0, 34, 56, 20, 36, 23, 54, 14, 41, 24, 37, 10, 55, 46, 25, 16, 45, 36, 4, 55, 23, 15, 8, 50, 62, 5, 56, 44, 20, 13, 28, 59, 31, 24, 47, 31, 52, 37, 17, 40, 0, 26, 49, 3, 60, 7, 33, 0, 61, 53, 40, 8, 45, 2, 41 },
+ { 16, 63, 43, 4, 61, 24, 56, 13, 53, 8, 36, 12, 24, 41, 16, 46, 60, 26, 52, 39, 14, 57, 21, 37, 0, 45, 7, 59, 38, 17, 43, 10, 45, 20, 61, 43, 19, 11, 33, 17, 50, 32, 23, 61, 28, 49, 26, 0, 18, 51, 5, 60, 22, 58, 29, 0, 59, 34, 19, 62, 3, 52, 7, 44, 30, 59, 13, 50, 15, 62, 7, 17, 38, 22, 44, 15, 40, 4, 47, 28, 33, 17, 49, 16, 51, 40, 10, 56, 0, 53, 13, 49, 28, 38, 60, 21, 43, 19, 37, 27, 3, 51, 34, 39, 0, 45, 15, 43, 10, 21, 3, 55, 8, 33, 59, 10, 41, 18, 52, 24, 46, 20, 30, 13, 58, 22, 36, 57 },
+ { 50, 34, 11, 47, 29, 17, 44, 0, 33, 63, 28, 46, 52, 5, 57, 10, 42, 18, 4, 63, 20, 8, 44, 10, 56, 34, 14, 29, 5, 54, 23, 59, 32, 49, 7, 34, 49, 27, 56, 0, 42, 7, 46, 3, 40, 6, 54, 32, 62, 13, 36, 10, 47, 8, 35, 49, 24, 51, 12, 40, 22, 35, 60, 12, 22, 51, 33, 4, 40, 25, 43, 55, 5, 54, 12, 61, 26, 51, 8, 62, 0, 53, 7, 63, 2, 32, 19, 34, 42, 24, 31, 63, 2, 10, 45, 33, 0, 48, 9, 61, 22, 47, 8, 62, 18, 56, 7, 54, 27, 57, 46, 30, 50, 19, 45, 30, 56, 36, 22, 47, 11, 38, 3, 51, 32, 48, 18, 9 },
+ { 0, 21, 40, 19, 52, 9, 37, 48, 20, 40, 3, 18, 27, 38, 35, 22, 31, 56, 13, 35, 46, 28, 60, 40, 27, 18, 61, 50, 41, 30, 7, 36, 2, 25, 16, 57, 5, 15, 47, 29, 55, 19, 30, 52, 15, 34, 20, 12, 43, 30, 20, 54, 25, 44, 53, 12, 38, 5, 55, 27, 48, 15, 33, 27, 45, 8, 19, 28, 56, 11, 33, 49, 18, 36, 29, 2, 45, 16, 39, 19, 31, 43, 27, 35, 20, 52, 26, 6, 61, 11, 41, 17, 29, 51, 20, 56, 25, 32, 41, 17, 53, 31, 25, 14, 42, 23, 35, 16, 38, 6, 34, 12, 15, 62, 6, 21, 13, 1, 63, 9, 55, 27, 43, 25, 14, 4, 31, 55 },
+ { 44, 29, 61, 2, 35, 58, 26, 15, 60, 10, 51, 59, 14, 55, 8, 50, 2, 44, 25, 51, 1, 33, 16, 4, 48, 36, 2, 21, 12, 57, 48, 13, 51, 55, 40, 28, 37, 62, 8, 39, 12, 63, 36, 10, 59, 24, 56, 47, 9, 50, 41, 1, 32, 17, 6, 21, 61, 30, 9, 43, 1, 54, 41, 2, 54, 37, 48, 61, 1, 46, 21, 3, 58, 24, 50, 32, 60, 10, 57, 25, 46, 12, 59, 4, 45, 13, 57, 47, 27, 39, 5, 58, 47, 14, 35, 4, 52, 13, 60, 6, 36, 10, 45, 55, 4, 50, 29, 2, 61, 50, 25, 58, 44, 24, 36, 42, 54, 28, 40, 32, 16, 56, 6, 62, 46, 39, 60, 23 },
+ { 7, 48, 14, 54, 23, 40, 4, 45, 30, 22, 42, 32, 1, 44, 20, 29, 58, 8, 37, 19, 41, 54, 24, 58, 9, 53, 25, 46, 34, 16, 23, 38, 27, 11, 18, 1, 52, 21, 35, 22, 48, 5, 25, 45, 18, 38, 2, 27, 35, 4, 57, 15, 62, 39, 57, 28, 42, 16, 36, 60, 24, 18, 10, 63, 20, 5, 16, 23, 37, 14, 59, 27, 41, 8, 13, 42, 21, 35, 6, 50, 3, 38, 15, 48, 30, 39, 17, 3, 49, 14, 53, 33, 24, 7, 61, 44, 11, 39, 23, 49, 19, 58, 1, 32, 36, 12, 60, 41, 20, 13, 41, 4, 39, 1, 48, 8, 18, 51, 14, 44, 5, 37, 21, 34, 1, 26, 10, 37 },
+ { 53, 36, 27, 9, 50, 12, 32, 55, 2, 57, 7, 17, 48, 34, 63, 15, 40, 26, 62, 11, 49, 6, 31, 39, 22, 42, 6, 63, 1, 39, 60, 4, 42, 61, 32, 45, 24, 44, 2, 60, 16, 41, 53, 1, 33, 61, 49, 17, 63, 23, 45, 26, 33, 3, 23, 46, 2, 50, 20, 4, 45, 34, 49, 30, 39, 58, 44, 31, 53, 34, 6, 52, 30, 47, 63, 1, 53, 22, 42, 31, 58, 23, 54, 22, 61, 8, 36, 59, 22, 35, 21, 1, 55, 40, 27, 16, 30, 54, 2, 29, 43, 16, 39, 63, 21, 46, 26, 10, 48, 32, 19, 53, 30, 56, 26, 60, 33, 4, 61, 23, 49, 59, 15, 53, 19, 58, 42, 16 },
+ { 20, 5, 59, 46, 25, 62, 7, 19, 43, 25, 37, 61, 11, 24, 4, 54, 12, 52, 3, 32, 17, 61, 12, 47, 15, 55, 18, 31, 53, 28, 9, 50, 21, 6, 55, 9, 58, 14, 54, 26, 33, 7, 31, 58, 13, 21, 8, 42, 29, 6, 37, 11, 48, 52, 14, 60, 11, 39, 56, 32, 14, 58, 7, 26, 17, 4, 42, 8, 11, 47, 19, 38, 10, 17, 26, 37, 9, 55, 28, 13, 18, 40, 6, 33, 1, 43, 25, 11, 51, 7, 62, 43, 18, 37, 3, 57, 45, 9, 38, 58, 5, 52, 27, 7, 17, 53, 5, 57, 37, 2, 63, 9, 22, 15, 11, 38, 25, 45, 35, 0, 28, 10, 41, 30, 50, 8, 31, 57 },
+ { 49, 33, 16, 38, 1, 42, 51, 34, 53, 14, 28, 49, 30, 56, 36, 23, 43, 20, 38, 56, 22, 45, 28, 0, 62, 35, 26, 44, 11, 19, 52, 35, 44, 15, 30, 38, 10, 31, 40, 4, 46, 50, 20, 40, 27, 44, 51, 14, 56, 53, 19, 59, 7, 29, 41, 19, 35, 25, 8, 52, 22, 44, 13, 53, 50, 32, 61, 24, 56, 25, 63, 0, 45, 57, 33, 59, 16, 46, 4, 62, 50, 11, 60, 37, 52, 19, 55, 29, 37, 46, 13, 26, 48, 10, 50, 34, 21, 63, 26, 13, 42, 33, 22, 55, 35, 28, 43, 15, 24, 51, 27, 34, 46, 49, 58, 3, 52, 9, 57, 19, 48, 55, 3, 35, 12, 45, 24, 3 },
+ { 41, 11, 56, 28, 18, 31, 22, 10, 37, 6, 47, 13, 3, 41, 9, 46, 0, 48, 29, 6, 34, 10, 55, 37, 20, 8, 49, 3, 41, 59, 14, 25, 0, 63, 19, 47, 27, 51, 17, 57, 23, 10, 61, 6, 54, 3, 38, 31, 0, 22, 34, 43, 20, 55, 31, 0, 49, 63, 29, 38, 3, 62, 28, 40, 0, 22, 14, 35, 2, 48, 15, 43, 23, 14, 3, 29, 49, 20, 39, 34, 0, 44, 29, 9, 15, 47, 5, 42, 0, 31, 58, 5, 31, 61, 23, 15, 0, 47, 19, 50, 24, 3, 59, 11, 44, 0, 31, 59, 6, 42, 17, 60, 0, 39, 20, 31, 43, 17, 29, 40, 12, 25, 60, 22, 52, 15, 63, 29 },
+ { 20, 52, 8, 44, 62, 4, 59, 49, 17, 63, 21, 39, 60, 18, 52, 27, 33, 59, 14, 51, 59, 43, 24, 5, 51, 30, 57, 17, 32, 5, 37, 56, 48, 34, 42, 3, 60, 5, 36, 13, 43, 37, 18, 34, 25, 12, 59, 24, 47, 36, 11, 50, 3, 38, 9, 58, 16, 5, 43, 18, 47, 10, 37, 18, 59, 46, 29, 52, 40, 12, 34, 28, 56, 36, 53, 7, 43, 8, 24, 52, 26, 17, 56, 43, 24, 32, 63, 20, 57, 16, 22, 52, 36, 8, 41, 56, 29, 32, 54, 7, 35, 57, 14, 48, 20, 62, 13, 39, 53, 29, 8, 45, 13, 29, 7, 61, 14, 54, 6, 63, 38, 32, 18, 43, 2, 39, 6, 47 },
+ { 0, 58, 23, 35, 13, 46, 12, 39, 0, 31, 55, 24, 5, 35, 15, 61, 17, 5, 39, 25, 18, 2, 50, 33, 41, 13, 39, 23, 62, 46, 29, 12, 22, 8, 56, 25, 20, 49, 32, 62, 0, 56, 11, 46, 63, 42, 9, 16, 55, 5, 60, 15, 62, 26, 45, 21, 36, 51, 13, 57, 31, 24, 55, 6, 35, 9, 57, 5, 20, 60, 7, 51, 5, 19, 40, 25, 61, 32, 56, 12, 36, 48, 21, 2, 58, 12, 39, 28, 9, 50, 40, 12, 44, 18, 25, 49, 6, 38, 11, 62, 18, 46, 30, 9, 40, 25, 49, 19, 10, 36, 55, 22, 33, 52, 41, 18, 37, 27, 49, 21, 2, 46, 7, 53, 33, 61, 27, 35 },
+ { 41, 31, 5, 39, 51, 26, 33, 57, 27, 41, 9, 44, 54, 29, 48, 7, 44, 36, 57, 10, 31, 63, 16, 45, 11, 60, 1, 47, 7, 20, 43, 3, 58, 36, 13, 52, 39, 7, 15, 28, 22, 48, 30, 21, 1, 29, 49, 44, 27, 17, 40, 30, 24, 42, 12, 53, 33, 7, 47, 20, 1, 42, 11, 49, 25, 43, 17, 32, 45, 27, 41, 21, 31, 62, 11, 49, 2, 15, 42, 5, 63, 7, 41, 27, 49, 6, 54, 23, 46, 34, 2, 28, 54, 3, 59, 12, 46, 17, 42, 28, 40, 1, 37, 51, 5, 55, 2, 34, 47, 16, 3, 62, 47, 5, 23, 56, 1, 44, 12, 34, 51, 16, 57, 11, 25, 17, 54, 13 },
+ { 60, 26, 55, 18, 3, 60, 20, 6, 52, 15, 50, 19, 32, 11, 23, 53, 26, 21, 1, 47, 42, 27, 8, 58, 21, 27, 53, 36, 26, 54, 31, 50, 17, 30, 45, 1, 29, 59, 44, 53, 41, 4, 35, 58, 51, 19, 32, 4, 52, 34, 48, 8, 51, 5, 56, 2, 25, 61, 27, 38, 54, 27, 62, 21, 51, 1, 39, 62, 10, 50, 1, 58, 13, 47, 38, 18, 35, 54, 22, 51, 30, 19, 59, 34, 14, 32, 44, 4, 60, 15, 52, 62, 20, 43, 30, 35, 21, 60, 4, 52, 12, 24, 61, 18, 30, 42, 23, 61, 25, 50, 27, 38, 11, 59, 12, 35, 50, 30, 59, 24, 8, 42, 28, 37, 48, 9, 44, 21 },
+ { 10, 47, 15, 50, 30, 43, 8, 45, 29, 2, 36, 59, 1, 58, 41, 3, 63, 31, 54, 20, 13, 55, 35, 38, 4, 44, 15, 9, 61, 2, 14, 38, 61, 10, 23, 54, 18, 12, 24, 2, 14, 55, 16, 8, 38, 14, 41, 60, 10, 23, 1, 58, 32, 17, 28, 37, 41, 15, 3, 60, 15, 33, 4, 36, 16, 59, 28, 14, 23, 55, 37, 18, 44, 28, 2, 57, 30, 10, 27, 46, 14, 38, 3, 53, 21, 61, 17, 35, 10, 41, 26, 7, 33, 9, 57, 1, 53, 37, 26, 20, 56, 48, 9, 33, 58, 16, 37, 7, 45, 1, 57, 15, 32, 26, 42, 23, 7, 20, 4, 54, 31, 62, 22, 1, 59, 30, 4, 51 },
+ { 36, 2, 38, 11, 24, 36, 54, 22, 62, 47, 25, 8, 28, 45, 16, 38, 12, 43, 9, 37, 49, 3, 23, 52, 18, 30, 50, 33, 19, 42, 49, 26, 6, 40, 47, 35, 63, 38, 50, 33, 60, 26, 36, 47, 24, 57, 6, 26, 39, 63, 19, 44, 14, 46, 61, 9, 50, 30, 45, 23, 10, 50, 44, 8, 31, 54, 6, 46, 36, 4, 30, 54, 8, 52, 22, 41, 4, 60, 40, 0, 58, 24, 45, 10, 37, 1, 48, 30, 56, 17, 38, 48, 24, 47, 19, 39, 14, 8, 45, 32, 2, 34, 27, 44, 4, 52, 11, 56, 31, 21, 40, 19, 44, 51, 2, 63, 46, 58, 36, 43, 14, 5, 50, 38, 14, 56, 40, 23 },
+ { 61, 46, 32, 63, 54, 1, 14, 34, 12, 40, 18, 49, 37, 10, 61, 30, 51, 24, 60, 7, 29, 40, 62, 11, 46, 58, 6, 56, 24, 10, 34, 52, 21, 59, 16, 3, 27, 5, 20, 46, 9, 40, 7, 62, 2, 30, 53, 15, 48, 10, 28, 35, 54, 6, 21, 34, 18, 55, 7, 40, 57, 19, 26, 60, 41, 13, 24, 51, 19, 61, 9, 25, 34, 15, 63, 11, 45, 17, 20, 47, 33, 8, 31, 62, 43, 26, 53, 7, 24, 59, 0, 13, 55, 4, 62, 27, 51, 31, 63, 15, 58, 7, 54, 14, 46, 22, 28, 43, 12, 63, 8, 54, 5, 17, 39, 33, 15, 10, 27, 17, 47, 34, 19, 45, 27, 12, 33, 17 },
+ { 5, 28, 21, 7, 17, 48, 42, 58, 23, 4, 63, 14, 55, 21, 34, 5, 19, 0, 45, 17, 52, 15, 25, 32, 0, 22, 40, 13, 45, 62, 18, 0, 43, 11, 33, 55, 30, 42, 57, 19, 51, 31, 22, 43, 18, 45, 34, 0, 43, 31, 56, 3, 23, 40, 59, 0, 44, 13, 48, 35, 2, 32, 46, 0, 21, 48, 35, 3, 40, 32, 43, 59, 0, 48, 33, 26, 53, 36, 55, 12, 51, 16, 55, 5, 18, 29, 11, 39, 51, 19, 45, 31, 42, 21, 35, 6, 22, 47, 10, 38, 23, 50, 20, 36, 0, 60, 38, 4, 50, 35, 48, 34, 24, 57, 9, 53, 28, 48, 61, 0, 56, 24, 53, 3, 63, 6, 42, 57 },
+ { 13, 53, 45, 40, 58, 27, 6, 16, 38, 51, 33, 30, 43, 2, 47, 56, 40, 50, 33, 57, 27, 5, 47, 42, 60, 36, 16, 54, 28, 4, 37, 57, 28, 51, 22, 8, 45, 14, 6, 39, 0, 54, 11, 59, 28, 12, 50, 21, 61, 13, 19, 38, 49, 11, 25, 37, 58, 29, 22, 63, 14, 56, 12, 53, 30, 63, 9, 57, 26, 12, 47, 16, 23, 39, 50, 6, 31, 2, 25, 6, 28, 41, 36, 22, 50, 57, 42, 3, 34, 8, 28, 61, 11, 50, 16, 54, 41, 0, 55, 43, 5, 29, 41, 63, 25, 16, 53, 18, 26, 10, 21, 0, 61, 30, 41, 22, 3, 38, 20, 39, 29, 8, 41, 16, 36, 52, 22, 19 },
+ { 55, 34, 0, 25, 10, 32, 56, 44, 28, 0, 57, 7, 26, 53, 23, 8, 13, 35, 22, 12, 36, 60, 20, 8, 14, 29, 48, 2, 41, 49, 23, 13, 39, 7, 48, 58, 25, 53, 34, 62, 28, 16, 48, 4, 37, 56, 27, 5, 36, 52, 46, 7, 62, 33, 52, 11, 17, 53, 5, 28, 41, 24, 38, 17, 5, 39, 20, 45, 15, 56, 5, 38, 60, 8, 14, 57, 21, 48, 62, 39, 59, 13, 1, 60, 9, 32, 16, 63, 44, 25, 52, 15, 36, 2, 60, 29, 12, 33, 25, 17, 59, 45, 13, 8, 49, 32, 6, 40, 59, 29, 45, 37, 13, 47, 6, 55, 30, 45, 9, 52, 13, 59, 25, 47, 32, 1, 49, 30 },
+ { 9, 39, 14, 61, 49, 37, 3, 20, 50, 13, 41, 19, 46, 17, 38, 59, 28, 62, 4, 44, 54, 1, 34, 51, 55, 7, 63, 32, 21, 8, 56, 31, 62, 19, 36, 1, 41, 17, 24, 12, 42, 35, 25, 52, 20, 8, 44, 59, 25, 2, 22, 42, 16, 29, 4, 46, 20, 36, 43, 9, 51, 8, 49, 26, 58, 33, 54, 1, 37, 29, 52, 20, 27, 45, 19, 35, 42, 16, 10, 32, 20, 49, 46, 27, 40, 4, 47, 22, 13, 55, 4, 47, 26, 44, 23, 40, 58, 19, 48, 13, 31, 2, 57, 34, 42, 19, 61, 32, 14, 55, 5, 51, 26, 19, 58, 16, 49, 14, 62, 5, 33, 44, 21, 7, 60, 26, 11, 41 },
+ { 62, 24, 47, 29, 8, 19, 53, 11, 60, 24, 32, 61, 4, 55, 31, 2, 49, 16, 39, 9, 31, 24, 43, 17, 26, 38, 11, 25, 58, 43, 12, 35, 3, 46, 15, 32, 63, 4, 49, 56, 2, 60, 10, 32, 63, 17, 39, 12, 55, 30, 57, 9, 48, 55, 39, 24, 60, 2, 58, 31, 19, 61, 34, 3, 42, 11, 22, 46, 7, 61, 10, 42, 3, 55, 32, 1, 58, 28, 44, 54, 4, 34, 23, 15, 56, 20, 37, 58, 6, 30, 38, 18, 63, 9, 32, 5, 51, 3, 62, 37, 52, 18, 39, 23, 3, 51, 9, 47, 1, 23, 43, 15, 60, 35, 11, 40, 1, 36, 31, 26, 57, 2, 37, 54, 18, 44, 58, 16 },
+ { 5, 51, 3, 33, 43, 62, 21, 42, 35, 9, 48, 15, 36, 10, 22, 42, 20, 46, 26, 56, 50, 12, 59, 3, 48, 19, 45, 53, 1, 27, 47, 17, 52, 24, 56, 11, 51, 21, 37, 30, 20, 46, 14, 41, 1, 47, 33, 7, 41, 17, 35, 27, 20, 1, 14, 54, 26, 33, 18, 47, 1, 44, 14, 59, 16, 52, 28, 18, 49, 31, 25, 34, 63, 13, 51, 24, 9, 50, 3, 23, 38, 63, 7, 52, 29, 46, 11, 33, 50, 22, 57, 36, 1, 57, 49, 17, 39, 28, 9, 35, 6, 27, 53, 15, 55, 30, 24, 58, 36, 41, 11, 52, 32, 3, 44, 25, 62, 23, 51, 15, 42, 22, 50, 10, 39, 4, 31, 35 },
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+ { 39, 27, 63, 20, 35, 41, 4, 45, 26, 5, 38, 13, 44, 2, 50, 17, 37, 52, 2, 13, 28, 58, 24, 51, 21, 8, 34, 48, 27, 42, 18, 51, 31, 56, 5, 36, 38, 44, 4, 17, 26, 11, 38, 23, 42, 8, 56, 39, 24, 51, 5, 56, 21, 59, 14, 6, 18, 42, 22, 35, 16, 37, 3, 25, 39, 46, 63, 5, 50, 17, 58, 8, 55, 3, 50, 12, 43, 17, 47, 2, 51, 9, 62, 12, 1, 35, 13, 50, 1, 37, 12, 51, 19, 29, 46, 59, 22, 58, 33, 45, 22, 60, 10, 32, 61, 39, 8, 33, 25, 36, 20, 60, 38, 4, 21, 5, 28, 45, 12, 18, 42, 11, 49, 1, 27, 40, 6, 30 },
+ { 24, 16, 42, 1, 50, 10, 48, 17, 33, 43, 24, 48, 21, 55, 31, 42, 10, 21, 63, 35, 49, 6, 33, 13, 41, 53, 10, 20, 60, 6, 53, 26, 12, 41, 22, 60, 14, 28, 63, 33, 49, 3, 45, 16, 48, 26, 14, 46, 18, 30, 35, 26, 8, 50, 29, 51, 25, 57, 12, 47, 53, 9, 62, 20, 54, 2, 36, 15, 40, 28, 33, 13, 38, 24, 46, 1, 29, 56, 33, 20, 44, 24, 41, 26, 57, 20, 63, 8, 30, 55, 5, 41, 62, 8, 34, 2, 37, 10, 19, 6, 37, 1, 53, 23, 5, 27, 58, 22, 43, 12, 50, 26, 9, 34, 54, 32, 49, 1, 59, 37, 22, 46, 25, 36, 51, 15, 54, 46 },
+ { 52, 7, 45, 33, 26, 58, 14, 60, 7, 54, 3, 58, 8, 34, 14, 5, 59, 30, 18, 44, 8, 22, 48, 62, 3, 26, 55, 38, 23, 16, 39, 1, 62, 24, 49, 9, 53, 19, 46, 7, 19, 60, 31, 58, 2, 34, 53, 7, 59, 2, 62, 42, 46, 19, 36, 11, 44, 4, 38, 28, 1, 43, 32, 51, 12, 29, 56, 22, 52, 2, 62, 49, 22, 60, 14, 35, 63, 5, 25, 57, 14, 53, 4, 46, 18, 31, 42, 22, 47, 20, 58, 31, 16, 43, 23, 54, 30, 42, 52, 57, 29, 49, 30, 13, 45, 48, 16, 55, 6, 63, 1, 44, 14, 58, 19, 47, 15, 24, 51, 34, 6, 55, 5, 63, 20, 41, 21, 9 },
+ { 30, 62, 18, 55, 5, 23, 39, 29, 49, 30, 15, 36, 28, 46, 60, 25, 39, 46, 4, 32, 61, 40, 15, 30, 36, 45, 14, 2, 49, 33, 57, 45, 18, 32, 3, 45, 30, 2, 35, 52, 40, 27, 13, 21, 38, 63, 20, 28, 37, 23, 16, 10, 13, 55, 2, 62, 21, 32, 60, 17, 58, 23, 5, 40, 16, 48, 7, 45, 10, 26, 43, 19, 6, 31, 52, 21, 39, 16, 48, 9, 37, 28, 36, 55, 7, 48, 3, 59, 15, 45, 25, 1, 53, 13, 47, 7, 62, 15, 4, 25, 12, 41, 18, 60, 38, 11, 34, 19, 39, 31, 29, 56, 23, 42, 3, 27, 60, 41, 8, 16, 61, 29, 43, 9, 32, 2, 60, 34 },
+ { 3, 38, 13, 37, 52, 44, 2, 19, 12, 42, 63, 19, 40, 1, 20, 50, 12, 55, 15, 56, 27, 1, 54, 11, 57, 18, 32, 63, 44, 4, 29, 13, 37, 61, 35, 16, 42, 57, 12, 22, 6, 55, 43, 10, 50, 5, 44, 11, 48, 52, 34, 58, 28, 41, 38, 30, 7, 52, 11, 49, 30, 14, 45, 27, 59, 34, 21, 38, 32, 58, 11, 36, 56, 42, 9, 41, 3, 54, 31, 42, 0, 60, 16, 11, 39, 24, 52, 33, 6, 36, 10, 40, 32, 60, 26, 20, 39, 28, 47, 34, 63, 8, 54, 3, 24, 56, 0, 51, 13, 47, 16, 40, 7, 35, 52, 11, 36, 4, 57, 30, 39, 13, 18, 50, 58, 28, 12, 48 },
+ { 57, 24, 49, 21, 10, 31, 61, 36, 56, 0, 22, 53, 11, 56, 32, 7, 36, 27, 41, 9, 46, 19, 34, 42, 25, 7, 50, 9, 28, 21, 54, 8, 50, 7, 27, 59, 10, 25, 48, 62, 37, 0, 33, 58, 25, 18, 32, 61, 0, 15, 45, 5, 50, 3, 23, 55, 47, 17, 40, 6, 60, 34, 53, 8, 41, 0, 61, 13, 54, 4, 46, 28, 0, 17, 48, 27, 58, 13, 23, 61, 33, 21, 50, 30, 62, 8, 14, 29, 56, 27, 61, 49, 17, 2, 44, 11, 51, 0, 59, 17, 40, 20, 32, 47, 36, 21, 42, 28, 60, 4, 54, 10, 59, 17, 30, 62, 21, 43, 26, 48, 0, 56, 36, 25, 8, 44, 39, 17 },
+ { 10, 42, 4, 59, 27, 47, 8, 23, 51, 32, 45, 6, 37, 26, 48, 43, 62, 0, 21, 53, 38, 12, 51, 5, 60, 47, 24, 37, 59, 15, 35, 47, 22, 55, 0, 50, 21, 40, 6, 29, 15, 52, 24, 8, 41, 55, 13, 29, 40, 56, 24, 31, 19, 33, 61, 15, 0, 35, 24, 42, 21, 2, 19, 57, 24, 15, 30, 50, 20, 25, 40, 16, 57, 34, 61, 8, 29, 45, 6, 49, 11, 47, 2, 44, 19, 57, 38, 50, 12, 42, 21, 4, 35, 52, 28, 56, 23, 36, 13, 45, 4, 52, 27, 14, 6, 62, 9, 45, 21, 37, 25, 46, 33, 49, 0, 44, 7, 53, 13, 19, 53, 31, 3, 47, 15, 56, 22, 51 },
+ { 35, 28, 53, 32, 1, 16, 54, 40, 9, 17, 25, 58, 14, 59, 3, 22, 16, 51, 31, 5, 23, 58, 28, 17, 35, 20, 0, 42, 11, 52, 3, 31, 41, 17, 43, 13, 32, 54, 18, 60, 32, 45, 17, 49, 2, 36, 51, 22, 7, 36, 9, 63, 48, 12, 46, 26, 43, 28, 63, 13, 48, 37, 51, 33, 5, 47, 55, 9, 42, 63, 7, 51, 24, 12, 37, 19, 55, 34, 18, 38, 15, 28, 54, 34, 5, 43, 22, 0, 48, 14, 54, 24, 58, 9, 38, 5, 32, 55, 21, 30, 49, 9, 59, 43, 30, 51, 35, 26, 7, 53, 2, 22, 14, 27, 57, 18, 38, 24, 33, 45, 10, 41, 20, 60, 37, 5, 32, 0 },
+ { 63, 19, 15, 40, 62, 35, 14, 28, 46, 61, 4, 49, 35, 10, 29, 54, 33, 8, 45, 62, 37, 1, 43, 55, 10, 52, 61, 30, 19, 40, 25, 62, 11, 38, 27, 58, 36, 3, 46, 8, 39, 4, 62, 28, 47, 20, 4, 54, 47, 27, 43, 1, 21, 38, 8, 58, 10, 54, 4, 56, 9, 26, 12, 39, 60, 27, 18, 37, 1, 31, 35, 5, 45, 50, 2, 43, 26, 1, 59, 23, 56, 40, 7, 26, 58, 17, 32, 63, 25, 39, 7, 31, 45, 19, 63, 15, 48, 8, 37, 61, 16, 34, 1, 56, 18, 3, 15, 58, 49, 32, 63, 41, 55, 5, 40, 22, 50, 6, 59, 2, 63, 23, 52, 11, 26, 61, 44, 23 },
+ { 11, 56, 46, 6, 22, 43, 58, 3, 34, 21, 38, 30, 18, 44, 52, 13, 41, 57, 17, 28, 14, 49, 25, 7, 33, 39, 26, 6, 56, 48, 1, 20, 56, 5, 46, 9, 19, 51, 30, 25, 56, 21, 35, 14, 57, 42, 16, 33, 10, 57, 17, 59, 41, 25, 53, 37, 20, 40, 30, 18, 31, 62, 44, 22, 3, 44, 11, 48, 23, 53, 18, 60, 29, 22, 62, 15, 53, 47, 10, 41, 3, 19, 52, 36, 13, 46, 10, 35, 3, 61, 41, 16, 1, 50, 26, 42, 18, 46, 2, 25, 54, 20, 39, 23, 47, 31, 41, 12, 38, 17, 8, 19, 31, 48, 12, 61, 9, 54, 29, 35, 15, 38, 6, 43, 34, 14, 7, 47 },
+ { 39, 2, 33, 26, 53, 8, 18, 50, 41, 12, 53, 1, 63, 24, 19, 39, 2, 24, 47, 10, 60, 38, 19, 63, 48, 4, 15, 45, 32, 14, 60, 36, 29, 53, 23, 63, 34, 12, 61, 1, 43, 11, 53, 30, 1, 26, 60, 45, 23, 39, 3, 29, 12, 50, 4, 16, 51, 3, 45, 36, 50, 1, 16, 54, 35, 14, 57, 30, 58, 9, 46, 14, 41, 10, 32, 38, 4, 30, 21, 51, 32, 63, 25, 1, 60, 27, 53, 18, 51, 22, 28, 55, 34, 12, 40, 3, 60, 29, 57, 41, 6, 44, 11, 53, 8, 61, 24, 57, 1, 28, 44, 59, 36, 3, 34, 25, 41, 31, 16, 44, 22, 47, 28, 58, 1, 49, 54, 29 },
+ { 58, 25, 50, 13, 38, 30, 60, 24, 6, 57, 27, 42, 9, 45, 6, 61, 30, 50, 4, 34, 29, 3, 46, 13, 22, 42, 58, 28, 9, 39, 23, 44, 7, 15, 44, 2, 40, 15, 47, 41, 23, 37, 7, 59, 38, 11, 34, 6, 62, 14, 52, 35, 55, 19, 32, 61, 33, 24, 57, 6, 22, 59, 29, 7, 49, 25, 40, 3, 17, 39, 27, 52, 0, 55, 16, 57, 24, 61, 36, 6, 29, 12, 48, 39, 20, 44, 6, 40, 33, 5, 48, 10, 57, 36, 22, 51, 33, 9, 24, 12, 62, 29, 50, 35, 14, 43, 5, 33, 47, 52, 13, 23, 10, 51, 56, 16, 46, 1, 49, 4, 61, 9, 52, 18, 31, 21, 36, 17 },
+ { 19, 42, 9, 48, 2, 44, 11, 37, 48, 20, 33, 16, 55, 35, 49, 15, 37, 20, 59, 16, 53, 22, 56, 31, 50, 11, 34, 54, 16, 51, 4, 49, 33, 53, 21, 28, 56, 24, 31, 9, 52, 16, 48, 24, 44, 13, 51, 20, 31, 49, 18, 6, 34, 2, 44, 14, 47, 8, 15, 43, 13, 41, 33, 52, 20, 61, 7, 51, 34, 62, 4, 20, 36, 33, 43, 8, 46, 13, 53, 17, 45, 42, 9, 31, 52, 11, 30, 56, 13, 59, 17, 44, 27, 6, 62, 11, 43, 17, 49, 38, 26, 2, 16, 27, 58, 21, 54, 18, 26, 5, 35, 61, 43, 27, 7, 39, 14, 58, 37, 55, 20, 33, 13, 40, 62, 10, 55, 5 },
+ { 51, 14, 61, 29, 59, 20, 55, 31, 0, 49, 11, 60, 3, 26, 22, 56, 0, 40, 12, 43, 41, 8, 36, 0, 17, 57, 24, 2, 46, 26, 61, 18, 0, 38, 12, 59, 6, 49, 3, 57, 19, 63, 5, 33, 18, 54, 28, 56, 0, 43, 26, 46, 63, 27, 56, 22, 27, 54, 38, 28, 63, 24, 10, 45, 0, 31, 42, 21, 12, 25, 44, 49, 59, 6, 26, 50, 3, 34, 27, 59, 0, 35, 62, 16, 4, 58, 47, 0, 43, 24, 37, 2, 54, 20, 46, 31, 0, 56, 34, 5, 55, 45, 60, 37, 0, 40, 10, 38, 63, 46, 15, 20, 0, 53, 21, 62, 30, 11, 24, 27, 40, 0, 57, 26, 3, 45, 27, 35 },
+};
+
+#else
+#define DM_WIDTH 8
+#define DM_HEIGHT 8
+static guchar DM[8][8] =
+{
+ { 0, 32, 8, 40, 2, 34, 10, 42 },
+ { 48, 16, 56, 24, 50, 18, 58, 26 },
+ { 12, 44, 4, 36, 14, 46, 6, 38 },
+ { 60, 28, 52, 20, 62, 30, 54, 22 },
+ { 3, 35, 11, 43, 1, 33, 9, 41 },
+ { 51, 19, 59, 27, 49, 17, 57, 25 },
+ { 15, 47, 7, 39, 13, 45, 5, 37 },
+ { 63, 31, 55, 23, 61, 29, 53, 21 }
+};
+#endif
+
+static void
+gdk_rgb_convert_8_d666 (GdkImage *image,
+ gint x0, gint y0, gint width, gint height,
+ guchar *buf, int rowstride,
+ gint x_align, gint y_align, GdkRgbCmap *cmap)
+{
+ int x, y;
+ gint bpl;
+ guchar *obuf, *obptr;
+ guchar *bptr, *bp2;
+ gint r, g, b;
+ guchar *dmp;
+ gint dith;
+
+ bptr = buf;
+ bpl = image->bpl;
+ obuf = ((guchar *)image->mem) + y0 * bpl + x0;
+ for (y = 0; y < height; y++)
+ {
+ dmp = DM[(y_align + y) & (DM_HEIGHT - 1)];
+ bp2 = bptr;
+ obptr = obuf;
+ for (x = 0; x < width; x++)
+ {
+ r = *bp2++;
+ g = *bp2++;
+ b = *bp2++;
+ dith = (dmp[(x_align + x) & (DM_WIDTH - 1)] << 2) | 7;
+ r = ((r * 5) + dith) >> 8;
+ g = ((g * 5) + (262 - dith)) >> 8;
+ b = ((b * 5) + dith) >> 8;
+ obptr[0] = colorcube_d[(r << 6) | (g << 3) | b];
+ obptr++;
+ }
+ bptr += rowstride;
+ obuf += bpl;
+ }
+}
+
+static void
+gdk_rgb_convert_8_d (GdkImage *image,
+ gint x0, gint y0, gint width, gint height,
+ guchar *buf, int rowstride,
+ gint x_align, gint y_align,
+ GdkRgbCmap *cmap)
+{
+ int x, y;
+ gint bpl;
+ guchar *obuf, *obptr;
+ guchar *bptr, *bp2;
+ gint r, g, b;
+ guchar *dmp;
+ gint dith;
+ gint rs, gs, bs;
+
+ bptr = buf;
+ bpl = image->bpl;
+ rs = image_info->nred_shades - 1;
+ gs = image_info->ngreen_shades - 1;
+ bs = image_info->nblue_shades - 1;
+ obuf = ((guchar *)image->mem) + y0 * bpl + x0;
+ for (y = 0; y < height; y++)
+ {
+ dmp = DM[(y_align + y) & (DM_HEIGHT - 1)];
+ bp2 = bptr;
+ obptr = obuf;
+ for (x = 0; x < width; x++)
+ {
+ r = *bp2++;
+ g = *bp2++;
+ b = *bp2++;
+ dith = (dmp[(x_align + x) & (DM_WIDTH - 1)] << 2) | 7;
+ r = ((r * rs) + dith) >> 8;
+ g = ((g * gs) + (262 - dith)) >> 8;
+ b = ((b * bs) + dith) >> 8;
+ obptr[0] = colorcube_d[(r << 6) | (g << 3) | b];
+ obptr++;
+ }
+ bptr += rowstride;
+ obuf += bpl;
+ }
+}
+
+static void
+gdk_rgb_convert_8_indexed (GdkImage *image,
+ gint x0, gint y0, gint width, gint height,
+ guchar *buf, int rowstride,
+ gint x_align, gint y_align, GdkRgbCmap *cmap)
+{
+ int x, y;
+ gint bpl;
+ guchar *obuf, *obptr;
+ guchar *bptr, *bp2;
+ guchar c;
+ guchar *lut;
+
+ lut = cmap->lut;
+ bptr = buf;
+ bpl = image->bpl;
+ obuf = ((guchar *)image->mem) + y0 * bpl + x0;
+ for (y = 0; y < height; y++)
+ {
+ bp2 = bptr;
+ obptr = obuf;
+ for (x = 0; x < width; x++)
+ {
+ c = *bp2++;
+ obptr[0] = lut[c];
+ obptr++;
+ }
+ bptr += rowstride;
+ obuf += bpl;
+ }
+}
+
+static void
+gdk_rgb_convert_gray8 (GdkImage *image,
+ gint x0, gint y0, gint width, gint height,
+ guchar *buf, int rowstride,
+ gint x_align, gint y_align, GdkRgbCmap *cmap)
+{
+ int x, y;
+ gint bpl;
+ guchar *obuf, *obptr;
+ guchar *bptr, *bp2;
+ gint r, g, b;
+
+ bptr = buf;
+ bpl = image->bpl;
+ obuf = ((guchar *)image->mem) + y0 * bpl + x0;
+ for (y = 0; y < height; y++)
+ {
+ bp2 = bptr;
+ obptr = obuf;
+ for (x = 0; x < width; x++)
+ {
+ r = *bp2++;
+ g = *bp2++;
+ b = *bp2++;
+ obptr[0] = (g + ((b + r) >> 1)) >> 1;
+ obptr++;
+ }
+ bptr += rowstride;
+ obuf += bpl;
+ }
+}
+
+static void
+gdk_rgb_convert_gray8_gray (GdkImage *image,
+ gint x0, gint y0, gint width, gint height,
+ guchar *buf, int rowstride,
+ gint x_align, gint y_align, GdkRgbCmap *cmap)
+{
+ int y;
+ gint bpl;
+ guchar *obuf;
+ guchar *bptr;
+
+ bptr = buf;
+ bpl = image->bpl;
+ obuf = ((guchar *)image->mem) + y0 * bpl + x0;
+ for (y = 0; y < height; y++)
+ {
+ memcpy (obuf, bptr, width);
+ bptr += rowstride;
+ obuf += bpl;
+ }
+}
+
+#ifndef WORDS_BIGENDIAN
+#define HAIRY_CONVERT_565
+#endif
+
+#ifdef HAIRY_CONVERT_565
+/* Render a 24-bit RGB image in buf into the GdkImage, without dithering.
+ This assumes native byte ordering - what should really be done is to
+ check whether static_image->byte_order is consistent with the _ENDIAN
+ config flag, and if not, use a different function.
+
+ This one is even faster than the one below - its inner loop loads 3
+ words (i.e. 4 24-bit pixels), does a lot of shifting and masking,
+ then writes 2 words. */
+static void
+gdk_rgb_convert_565 (GdkImage *image,
+ gint x0, gint y0, gint width, gint height,
+ guchar *buf, int rowstride,
+ gint x_align, gint y_align, GdkRgbCmap *cmap)
+{
+ int x, y;
+ guchar *obuf, *obptr;
+ gint bpl;
+ guchar *bptr, *bp2;
+ guchar r, g, b;
+
+ bptr = buf;
+ bpl = image->bpl;
+ obuf = ((guchar *)image->mem) + y0 * bpl + x0 * 2;
+ for (y = 0; y < height; y++)
+ {
+ bp2 = bptr;
+ obptr = obuf;
+ if (width < 8 || (((unsigned long)obuf | (unsigned long) bp2) & 3))
+ {
+ for (x = 0; x < width; x++)
+ {
+ r = *bp2++;
+ g = *bp2++;
+ b = *bp2++;
+ ((guint16 *)obptr)[0] = ((r & 0xf8) << 8) |
+ ((g & 0xfc) << 3) |
+ (b >> 3);
+ obptr += 2;
+ }
+ }
+ else
+ {
+ for (x = 0; x < width - 3; x += 4)
+ {
+ guint32 r1b0g0r0;
+ guint32 g2r2b1g1;
+ guint32 b3g3r3b2;
+
+ r1b0g0r0 = ((guint32 *)bp2)[0];
+ g2r2b1g1 = ((guint32 *)bp2)[1];
+ b3g3r3b2 = ((guint32 *)bp2)[2];
+ ((guint32 *)obptr)[0] =
+ ((r1b0g0r0 & 0xf8) << 8) |
+ ((r1b0g0r0 & 0xfc00) >> 5) |
+ ((r1b0g0r0 & 0xf80000) >> 19) |
+ (r1b0g0r0 & 0xf8000000) |
+ ((g2r2b1g1 & 0xfc) << 19) |
+ ((g2r2b1g1 & 0xf800) << 5);
+ ((guint32 *)obptr)[1] =
+ ((g2r2b1g1 & 0xf80000) >> 8) |
+ ((g2r2b1g1 & 0xfc000000) >> 21) |
+ ((b3g3r3b2 & 0xf8) >> 3) |
+ ((b3g3r3b2 & 0xf800) << 16) |
+ ((b3g3r3b2 & 0xfc0000) << 3) |
+ ((b3g3r3b2 & 0xf8000000) >> 11);
+ bp2 += 12;
+ obptr += 8;
+ }
+ for (; x < width; x++)
+ {
+ r = *bp2++;
+ g = *bp2++;
+ b = *bp2++;
+ ((guint16 *)obptr)[0] = ((r & 0xf8) << 8) |
+ ((g & 0xfc) << 3) |
+ (b >> 3);
+ obptr += 2;
+ }
+ }
+ bptr += rowstride;
+ obuf += bpl;
+ }
+}
+#else
+/* Render a 24-bit RGB image in buf into the GdkImage, without dithering.
+ This assumes native byte ordering - what should really be done is to
+ check whether static_image->byte_order is consistent with the _ENDIAN
+ config flag, and if not, use a different function.
+
+ This routine is faster than the one included with Gtk 1.0 for a number
+ of reasons:
+
+ 1. Shifting instead of lookup tables (less memory traffic).
+
+ 2. Much less register pressure, especially because shifts are
+ in the code.
+
+ 3. A memcpy is avoided (i.e. the transfer function).
+
+ 4. On big-endian architectures, byte swapping is avoided.
+
+ That said, it wouldn't be hard to make it even faster - just make an
+ inner loop that reads 3 words (i.e. 4 24-bit pixels), does a lot of
+ shifting and masking, then writes 2 words.
+*/
+static void
+gdk_rgb_convert_565 (GdkImage *image,
+ gint x0, gint y0, gint width, gint height,
+ guchar *buf, int rowstride,
+ gint x_align, gint y_align, GdkRgbCmap *cmap)
+{
+ int x, y;
+ guchar *obuf;
+ gint bpl;
+ guchar *bptr, *bp2;
+ guchar r, g, b;
+
+ bptr = buf;
+ bpl = image->bpl;
+ obuf = ((guchar *)image->mem) + y0 * bpl + x0 * 2;
+ for (y = 0; y < height; y++)
+ {
+ bp2 = bptr;
+ for (x = 0; x < width; x++)
+ {
+ r = *bp2++;
+ g = *bp2++;
+ b = *bp2++;
+ ((unsigned short *)obuf)[x] = ((r & 0xf8) << 8) |
+ ((g & 0xfc) << 3) |
+ (b >> 3);
+ }
+ bptr += rowstride;
+ obuf += bpl;
+ }
+}
+#endif
+
+#ifdef HAIRY_CONVERT_565
+static void
+gdk_rgb_convert_565_gray (GdkImage *image,
+ gint x0, gint y0, gint width, gint height,
+ guchar *buf, int rowstride,
+ gint x_align, gint y_align, GdkRgbCmap *cmap)
+{
+ int x, y;
+ guchar *obuf, *obptr;
+ gint bpl;
+ guchar *bptr, *bp2;
+ guchar g;
+
+ bptr = buf;
+ bpl = image->bpl;
+ obuf = ((guchar *)image->mem) + y0 * bpl + x0 * 2;
+ for (y = 0; y < height; y++)
+ {
+ bp2 = bptr;
+ obptr = obuf;
+ if (width < 8 || (((unsigned long)obuf | (unsigned long) bp2) & 3))
+ {
+ for (x = 0; x < width; x++)
+ {
+ g = *bp2++;
+ ((guint16 *)obptr)[0] = ((g & 0xf8) << 8) |
+ ((g & 0xfc) << 3) |
+ (g >> 3);
+ obptr += 2;
+ }
+ }
+ else
+ {
+ for (x = 0; x < width - 3; x += 4)
+ {
+ guint32 g3g2g1g0;
+
+ g3g2g1g0 = ((guint32 *)bp2)[0];
+ ((guint32 *)obptr)[0] =
+ ((g3g2g1g0 & 0xf8) << 8) |
+ ((g3g2g1g0 & 0xfc) << 3) |
+ ((g3g2g1g0 & 0xf8) >> 3) |
+ (g3g2g1g0 & 0xf800) << 16 |
+ ((g3g2g1g0 & 0xfc00) << 11) |
+ ((g3g2g1g0 & 0xf800) << 5);
+ ((guint32 *)obptr)[1] =
+ ((g3g2g1g0 & 0xf80000) >> 8) |
+ ((g3g2g1g0 & 0xfc0000) >> 13) |
+ ((g3g2g1g0 & 0xf80000) >> 19) |
+ (g3g2g1g0 & 0xf8000000) |
+ ((g3g2g1g0 & 0xfc000000) >> 5) |
+ ((g3g2g1g0 & 0xf8000000) >> 11);
+ bp2 += 4;
+ obptr += 8;
+ }
+ for (; x < width; x++)
+ {
+ g = *bp2++;
+ ((guint16 *)obptr)[0] = ((g & 0xf8) << 8) |
+ ((g & 0xfc) << 3) |
+ (g >> 3);
+ obptr += 2;
+ }
+ }
+ bptr += rowstride;
+ obuf += bpl;
+ }
+}
+#else
+static void
+gdk_rgb_convert_565_gray (GdkImage *image,
+ gint x0, gint y0, gint width, gint height,
+ guchar *buf, int rowstride,
+ gint x_align, gint y_align, GdkRgbCmap *cmap)
+{
+ int x, y;
+ guchar *obuf;
+ gint bpl;
+ guchar *bptr, *bp2;
+ guchar g;
+
+ bptr = buf;
+ bpl = image->bpl;
+ obuf = ((guchar *)image->mem) + y0 * bpl + x0 * 2;
+ for (y = 0; y < height; y++)
+ {
+ bp2 = bptr;
+ for (x = 0; x < width; x++)
+ {
+ g = *bp2++;
+ ((guint16 *)obptr)[0] = ((g & 0xf8) << 8) |
+ ((g & 0xfc) << 3) |
+ (g >> 3);
+ }
+ bptr += rowstride;
+ obuf += bpl;
+ }
+}
+#endif
+
+static void
+gdk_rgb_convert_565_br (GdkImage *image,
+ gint x0, gint y0, gint width, gint height,
+ guchar *buf, int rowstride,
+ gint x_align, gint y_align, GdkRgbCmap *cmap)
+{
+ int x, y;
+ guchar *obuf;
+ gint bpl;
+ guchar *bptr, *bp2;
+ guchar r, g, b;
+
+ bptr = buf;
+ bpl = image->bpl;
+ obuf = ((guchar *)image->mem) + y0 * bpl + x0 * 2;
+ for (y = 0; y < height; y++)
+ {
+ bp2 = bptr;
+ for (x = 0; x < width; x++)
+ {
+ r = *bp2++;
+ g = *bp2++;
+ b = *bp2++;
+ /* final word is:
+ g4 g3 g2 b7 b6 b5 b4 b3 r7 r6 r5 r4 r3 g7 g6 g5
+ */
+ ((unsigned short *)obuf)[x] = (r & 0xf8) |
+ ((g & 0xe0) >> 5) |
+ ((g & 0x1c) << 11) |
+ ((b & 0xf8) << 5);
+ }
+ bptr += rowstride;
+ obuf += bpl;
+ }
+}
+
+static void
+gdk_rgb_convert_565_d (GdkImage *image,
+ gint x0, gint y0, gint width, gint height,
+ guchar *buf, int rowstride,
+ gint x_align, gint y_align, GdkRgbCmap *cmap)
+{
+ int x, y;
+ guchar *obuf;
+ gint bpl;
+ guchar *bptr, *bp2;
+ guchar r, g, b;
+ gint dith;
+ gint r1, g1, b1;
+ guchar *dmp;
+
+ bptr = buf;
+ bpl = image->bpl;
+ obuf = ((guchar *)image->mem) + y0 * bpl + x0 * 2;
+ for (y = 0; y < height; y++)
+ {
+ dmp = DM[(y_align + y) & (DM_HEIGHT - 1)];
+ bp2 = bptr;
+ for (x = 0; x < width; x++)
+ {
+ r = *bp2++;
+ g = *bp2++;
+ b = *bp2++;
+ dith = dmp[(x_align + x) & (DM_WIDTH - 1)] >> 3;
+ r1 = r + dith;
+ g1 = g + ((7 - dith) >> 1);
+ b1 = b + dith;
+ ((unsigned short *)obuf)[x] = (((r1 - (r1 >> 5)) & 0xf8) << 8) |
+ (((g1 - (g1 >> 6)) & 0xfc) << 3) |
+ (((b1 - (b1 >> 5)) & 0xf8) >> 3);
+ }
+ bptr += rowstride;
+ obuf += bpl;
+ }
+}
+
+static void
+gdk_rgb_convert_555 (GdkImage *image,
+ gint x0, gint y0, gint width, gint height,
+ guchar *buf, int rowstride,
+ gint x_align, gint y_align, GdkRgbCmap *cmap)
+{
+ int x, y;
+ guchar *obuf;
+ gint bpl;
+ guchar *bptr, *bp2;
+ guchar r, g, b;
+
+ bptr = buf;
+ bpl = image->bpl;
+ obuf = ((guchar *)image->mem) + y0 * bpl + x0 * 2;
+ for (y = 0; y < height; y++)
+ {
+ bp2 = bptr;
+ for (x = 0; x < width; x++)
+ {
+ r = *bp2++;
+ g = *bp2++;
+ b = *bp2++;
+ ((unsigned short *)obuf)[x] = ((r & 0xf8) << 7) |
+ ((g & 0xf8) << 2) |
+ (b >> 3);
+ }
+ bptr += rowstride;
+ obuf += bpl;
+ }
+}
+
+static void
+gdk_rgb_convert_555_br (GdkImage *image,
+ gint x0, gint y0, gint width, gint height,
+ guchar *buf, int rowstride,
+ gint x_align, gint y_align, GdkRgbCmap *cmap)
+{
+ int x, y;
+ guchar *obuf;
+ gint bpl;
+ guchar *bptr, *bp2;
+ guchar r, g, b;
+
+ bptr = buf;
+ bpl = image->bpl;
+ obuf = ((guchar *)image->mem) + y0 * bpl + x0 * 2;
+ for (y = 0; y < height; y++)
+ {
+ bp2 = bptr;
+ for (x = 0; x < width; x++)
+ {
+ r = *bp2++;
+ g = *bp2++;
+ b = *bp2++;
+ /* final word is:
+ g5 g4 g3 b7 b6 b5 b4 b3 0 r7 r6 r5 r4 r3 g7 g6
+ */
+ ((unsigned short *)obuf)[x] = ((r & 0xf8) >> 1) |
+ ((g & 0xc0) >> 6) |
+ ((g & 0x18) << 10) |
+ ((b & 0xf8) << 5);
+ }
+ bptr += rowstride;
+ obuf += bpl;
+ }
+}
+
+static void
+gdk_rgb_convert_888_msb (GdkImage *image,
+ gint x0, gint y0, gint width, gint height,
+ guchar *buf, int rowstride,
+ gint x_align, gint y_align, GdkRgbCmap *cmap)
+{
+ int y;
+ guchar *obuf;
+ gint bpl;
+ guchar *bptr;
+
+ bptr = buf;
+ bpl = image->bpl;
+ obuf = ((guchar *)image->mem) + y0 * bpl + x0 * 3;
+ for (y = 0; y < height; y++)
+ {
+ memcpy (obuf, bptr, width + width + width);
+ bptr += rowstride;
+ obuf += bpl;
+ }
+}
+
+/* todo: optimize this */
+#ifndef WORDS_BIGENDIAN
+#define HAIRY_CONVERT_888
+#endif
+
+#ifdef HAIRY_CONVERT_888
+static void
+gdk_rgb_convert_888_lsb (GdkImage *image,
+ gint x0, gint y0, gint width, gint height,
+ guchar *buf, int rowstride,
+ gint x_align, gint y_align, GdkRgbCmap *cmap)
+{
+ int x, y;
+ guchar *obuf, *obptr;
+ gint bpl;
+ guchar *bptr, *bp2;
+ int r, g, b;
+
+ bptr = buf;
+ bpl = image->bpl;
+ obuf = ((guchar *)image->mem) + y0 * bpl + x0 * 3;
+ for (y = 0; y < height; y++)
+ {
+ bp2 = bptr;
+ obptr = obuf;
+ if (width < 8 || (((unsigned long)obuf | (unsigned long) bp2) & 3))
+ {
+ for (x = 0; x < width; x++)
+ {
+ r = bp2[0];
+ g = bp2[1];
+ b = bp2[2];
+ *obptr++ = b;
+ *obptr++ = g;
+ *obptr++ = r;
+ bp2 += 3;
+ }
+ }
+ else
+ {
+ for (x = 0; x < width - 3; x += 4)
+ {
+ guint32 r1b0g0r0;
+ guint32 g2r2b1g1;
+ guint32 b3g3r3b2;
+
+ r1b0g0r0 = ((guint32 *)bp2)[0];
+ g2r2b1g1 = ((guint32 *)bp2)[1];
+ b3g3r3b2 = ((guint32 *)bp2)[2];
+ ((guint32 *)obptr)[0] =
+ (r1b0g0r0 & 0xff00) |
+ ((r1b0g0r0 & 0xff0000) >> 16) |
+ (((g2r2b1g1 & 0xff00) | (r1b0g0r0 & 0xff)) << 16);
+ ((guint32 *)obptr)[1] =
+ (g2r2b1g1 & 0xff0000ff) |
+ ((r1b0g0r0 & 0xff000000) >> 16) |
+ ((b3g3r3b2 & 0xff) << 16);
+ ((guint32 *)obptr)[2] =
+ (((g2r2b1g1 & 0xff0000) | (b3g3r3b2 & 0xff000000)) >> 16) |
+ ((b3g3r3b2 & 0xff00) << 16) |
+ ((b3g3r3b2 & 0xff0000));
+ bp2 += 12;
+ obptr += 12;
+ }
+ for (; x < width; x++)
+ {
+ r = bp2[0];
+ g = bp2[1];
+ b = bp2[2];
+ *obptr++ = b;
+ *obptr++ = g;
+ *obptr++ = r;
+ bp2 += 3;
+ }
+ }
+ bptr += rowstride;
+ obuf += bpl;
+ }
+}
+#else
+static void
+gdk_rgb_convert_888_lsb (GdkImage *image,
+ gint x0, gint y0, gint width, gint height,
+ guchar *buf, int rowstride,
+ gint x_align, gint y_align, GdkRgbCmap *cmap)
+{
+ int x, y;
+ guchar *obuf;
+ gint bpl;
+ guchar *bptr, *bp2;
+ int r, g, b;
+
+ bptr = buf;
+ bpl = image->bpl;
+ obuf = ((guchar *)image->mem) + y0 * bpl + x0 * 3;
+ for (y = 0; y < height; y++)
+ {
+ bp2 = bptr;
+ for (x = 0; x < width; x++)
+ {
+ r = bp2[0];
+ g = bp2[1];
+ b = bp2[2];
+ obuf[x * 3] = b;
+ obuf[x * 3 + 1] = g;
+ obuf[x * 3 + 2] = r;
+ bp2 += 3;
+ }
+ bptr += rowstride;
+ obuf += bpl;
+ }
+}
+#endif
+
+/* convert 24-bit packed to 32-bit unpacked */
+/* todo: optimize this */
+static void
+gdk_rgb_convert_0888 (GdkImage *image,
+ gint x0, gint y0, gint width, gint height,
+ guchar *buf, int rowstride,
+ gint x_align, gint y_align, GdkRgbCmap *cmap)
+{
+ int x, y;
+ guchar *obuf;
+ gint bpl;
+ guchar *bptr, *bp2;
+ int r, g, b;
+
+ bptr = buf;
+ bpl = image->bpl;
+ obuf = ((guchar *)image->mem) + y0 * bpl + x0 * 4;
+ for (y = 0; y < height; y++)
+ {
+ bp2 = bptr;
+ for (x = 0; x < width; x++)
+ {
+ r = bp2[0];
+ g = bp2[1];
+ b = bp2[2];
+ ((unsigned long *)obuf)[x] = (r << 16) | (g << 8) | b;
+ bp2 += 3;
+ }
+ bptr += rowstride;
+ obuf += bpl;
+ }
+}
+
+static void
+gdk_rgb_convert_0888_br (GdkImage *image,
+ gint x0, gint y0, gint width, gint height,
+ guchar *buf, int rowstride,
+ gint x_align, gint y_align, GdkRgbCmap *cmap)
+{
+ int x, y;
+ guchar *obuf;
+ gint bpl;
+ guchar *bptr, *bp2;
+ int r, g, b;
+
+ bptr = buf;
+ bpl = image->bpl;
+ obuf = ((guchar *)image->mem) + y0 * bpl + x0 * 4;
+ for (y = 0; y < height; y++)
+ {
+ bp2 = bptr;
+ for (x = 0; x < width; x++)
+ {
+ r = bp2[0];
+ g = bp2[1];
+ b = bp2[2];
+ ((unsigned long *)obuf)[x] = (b << 24) | (g << 16) | (r << 8);
+ bp2 += 3;
+ }
+ bptr += rowstride;
+ obuf += bpl;
+ }
+}
+
+/* Generic truecolor/directcolor conversion function. Slow, but these
+ are oddball modes. */
+static void
+gdk_rgb_convert_truecolor_lsb (GdkImage *image,
+ gint x0, gint y0, gint width, gint height,
+ guchar *buf, int rowstride,
+ gint x_align, gint y_align,
+ GdkRgbCmap *cmap)
+{
+ int x, y;
+ guchar *obuf, *obptr;
+ gint bpl;
+ guchar *bptr, *bp2;
+ gint r, g, b;
+ gint r_right, r_left;
+ gint g_right, g_left;
+ gint b_right, b_left;
+ gint bpp;
+ guint32 pixel;
+ gint i;
+
+ r_right = 8 - image_info->visual->red_prec;
+ r_left = image_info->visual->red_shift;
+ g_right = 8 - image_info->visual->green_prec;
+ g_left = image_info->visual->green_shift;
+ b_right = 8 - image_info->visual->blue_prec;
+ b_left = image_info->visual->blue_shift;
+ bpp = image_info->bpp;
+ bptr = buf;
+ bpl = image->bpl;
+ obuf = ((guchar *)image->mem) + y0 * bpl + x0 * bpp;
+ for (y = 0; y < height; y++)
+ {
+ obptr = obuf;
+ bp2 = bptr;
+ for (x = 0; x < width; x++)
+ {
+ r = bp2[0];
+ g = bp2[1];
+ b = bp2[2];
+ pixel = ((r >> r_right) << r_left) |
+ ((g >> g_right) << g_left) |
+ ((b >> b_right) << b_left);
+ for (i = 0; i < bpp; i++)
+ {
+ *obptr++ = pixel & 0xff;
+ pixel >>= 8;
+ }
+ bp2 += 3;
+ }
+ bptr += rowstride;
+ obuf += bpl;
+ }
+}
+
+static void
+gdk_rgb_convert_truecolor_lsb_d (GdkImage *image,
+ gint x0, gint y0, gint width, gint height,
+ guchar *buf, int rowstride,
+ gint x_align, gint y_align,
+ GdkRgbCmap *cmap)
+{
+ int x, y;
+ guchar *obuf, *obptr;
+ gint bpl;
+ guchar *bptr, *bp2;
+ gint r, g, b;
+ gint r_right, r_left, r_prec;
+ gint g_right, g_left, g_prec;
+ gint b_right, b_left, b_prec;
+ gint bpp;
+ guint32 pixel;
+ gint i;
+ gint dith;
+ gint r1, g1, b1;
+ guchar *dmp;
+
+ r_right = 8 - image_info->visual->red_prec;
+ r_left = image_info->visual->red_shift;
+ r_prec = image_info->visual->red_prec;
+ g_right = 8 - image_info->visual->green_prec;
+ g_left = image_info->visual->green_shift;
+ g_prec = image_info->visual->green_prec;
+ b_right = 8 - image_info->visual->blue_prec;
+ b_left = image_info->visual->blue_shift;
+ b_prec = image_info->visual->blue_prec;
+ bpp = image_info->bpp;
+ bptr = buf;
+ bpl = image->bpl;
+ obuf = ((guchar *)image->mem) + y0 * bpl + x0 * bpp;
+ for (y = 0; y < height; y++)
+ {
+ dmp = DM[(y_align + y) & (DM_HEIGHT - 1)];
+ obptr = obuf;
+ bp2 = bptr;
+ for (x = 0; x < width; x++)
+ {
+ r = bp2[0];
+ g = bp2[1];
+ b = bp2[2];
+ dith = dmp[(x_align + x) & (DM_WIDTH - 1)] << 2;
+ r1 = r + (dith >> r_prec);
+ g1 = g + ((252 - dith) >> g_prec);
+ b1 = b + (dith >> b_prec);
+ pixel = (((r1 - (r1 >> r_prec)) >> r_right) << r_left) |
+ (((g1 - (g1 >> g_prec)) >> g_right) << g_left) |
+ (((b1 - (b1 >> b_prec)) >> b_right) << b_left);
+ for (i = 0; i < bpp; i++)
+ {
+ *obptr++ = pixel & 0xff;
+ pixel >>= 8;
+ }
+ bp2 += 3;
+ }
+ bptr += rowstride;
+ obuf += bpl;
+ }
+}
+
+static void
+gdk_rgb_convert_truecolor_msb (GdkImage *image,
+ gint x0, gint y0, gint width, gint height,
+ guchar *buf, int rowstride,
+ gint x_align, gint y_align,
+ GdkRgbCmap *cmap)
+{
+ int x, y;
+ guchar *obuf, *obptr;
+ gint bpl;
+ guchar *bptr, *bp2;
+ gint r, g, b;
+ gint r_right, r_left;
+ gint g_right, g_left;
+ gint b_right, b_left;
+ gint bpp;
+ guint32 pixel;
+ gint shift, shift_init;
+
+ r_right = 8 - image_info->visual->red_prec;
+ r_left = image_info->visual->red_shift;
+ g_right = 8 - image_info->visual->green_prec;
+ g_left = image_info->visual->green_shift;
+ b_right = 8 - image_info->visual->blue_prec;
+ b_left = image_info->visual->blue_shift;
+ bpp = image_info->bpp;
+ bptr = buf;
+ bpl = image->bpl;
+ obuf = ((guchar *)image->mem) + y0 * bpl + x0 * bpp;
+ shift_init = (bpp - 1) << 3;
+ for (y = 0; y < height; y++)
+ {
+ obptr = obuf;
+ bp2 = bptr;
+ for (x = 0; x < width; x++)
+ {
+ r = bp2[0];
+ g = bp2[1];
+ b = bp2[2];
+ pixel = ((r >> r_right) << r_left) |
+ ((g >> g_right) << g_left) |
+ ((b >> b_right) << b_left);
+ for (shift = shift_init; shift >= 0; shift -= 8)
+ {
+ *obptr++ = (pixel >> shift) & 0xff;
+ }
+ bp2 += 3;
+ }
+ bptr += rowstride;
+ obuf += bpl;
+ }
+}
+
+static void
+gdk_rgb_convert_truecolor_msb_d (GdkImage *image,
+ gint x0, gint y0, gint width, gint height,
+ guchar *buf, int rowstride,
+ gint x_align, gint y_align,
+ GdkRgbCmap *cmap)
+{
+ int x, y;
+ guchar *obuf, *obptr;
+ gint bpl;
+ guchar *bptr, *bp2;
+ gint r, g, b;
+ gint r_right, r_left, r_prec;
+ gint g_right, g_left, g_prec;
+ gint b_right, b_left, b_prec;
+ gint bpp;
+ guint32 pixel;
+ gint shift, shift_init;
+ gint dith;
+ gint r1, g1, b1;
+ guchar *dmp;
+
+ r_right = 8 - image_info->visual->red_prec;
+ r_left = image_info->visual->red_shift;
+ r_prec = image_info->visual->red_prec;
+ g_right = 8 - image_info->visual->green_prec;
+ g_left = image_info->visual->green_shift;
+ g_prec = image_info->visual->green_prec;
+ b_right = 8 - image_info->visual->blue_prec;
+ b_left = image_info->visual->blue_shift;
+ b_prec = image_info->visual->blue_prec;
+ bpp = image_info->bpp;
+ bptr = buf;
+ bpl = image->bpl;
+ obuf = ((guchar *)image->mem) + y0 * bpl + x0 * bpp;
+ shift_init = (bpp - 1) << 3;
+ for (y = 0; y < height; y++)
+ {
+ dmp = DM[(y_align + y) & (DM_HEIGHT - 1)];
+ obptr = obuf;
+ bp2 = bptr;
+ for (x = 0; x < width; x++)
+ {
+ r = bp2[0];
+ g = bp2[1];
+ b = bp2[2];
+ dith = dmp[(x_align + x) & (DM_WIDTH - 1)] << 2;
+ r1 = r + (dith >> r_prec);
+ g1 = g + ((252 - dith) >> g_prec);
+ b1 = b + (dith >> b_prec);
+ pixel = (((r1 - (r1 >> r_prec)) >> r_right) << r_left) |
+ (((g1 - (g1 >> g_prec)) >> g_right) << g_left) |
+ (((b1 - (b1 >> b_prec)) >> b_right) << b_left);
+ for (shift = shift_init; shift >= 0; shift -= 8)
+ {
+ *obptr++ = (pixel >> shift) & 0xff;
+ }
+ bp2 += 3;
+ }
+ bptr += rowstride;
+ obuf += bpl;
+ }
+}
+
+/* Returns a pointer to the stage buffer. */
+static guchar *
+gdk_rgb_ensure_stage (void)
+{
+ if (image_info->stage_buf == NULL)
+ image_info->stage_buf = g_malloc (IMAGE_HEIGHT * STAGE_ROWSTRIDE);
+ return image_info->stage_buf;
+}
+
+/* This is slow. Speed me up, please. */
+static void
+gdk_rgb_32_to_stage (guchar *buf, gint rowstride, gint width, gint height)
+{
+ gint x, y;
+ guchar *pi_start, *po_start;
+ guchar *pi, *po;
+
+ pi_start = buf;
+ po_start = gdk_rgb_ensure_stage ();
+ for (y = 0; y < height; y++)
+ {
+ pi = pi_start;
+ po = po_start;
+ for (x = 0; x < width; x++)
+ {
+ *po++ = *pi++;
+ *po++ = *pi++;
+ *po++ = *pi++;
+ pi++;
+ }
+ pi_start += rowstride;
+ po_start += STAGE_ROWSTRIDE;
+ }
+}
+
+/* Generic 32bit RGB conversion function - convert to 24bit packed, then
+ go from there. */
+static void
+gdk_rgb_convert_32_generic (GdkImage *image,
+ gint x0, gint y0, gint width, gint height,
+ guchar *buf, gint rowstride,
+ gint x_align, gint y_align, GdkRgbCmap *cmap)
+{
+ gdk_rgb_32_to_stage (buf, rowstride, width, height);
+
+ (*image_info->conv) (image, x0, y0, width, height,
+ image_info->stage_buf, STAGE_ROWSTRIDE,
+ x_align, y_align, cmap);
+}
+
+/* Generic 32bit RGB conversion function - convert to 24bit packed, then
+ go from there. */
+static void
+gdk_rgb_convert_32_generic_d (GdkImage *image,
+ gint x0, gint y0, gint width, gint height,
+ guchar *buf, gint rowstride,
+ gint x_align, gint y_align, GdkRgbCmap *cmap)
+{
+ gdk_rgb_32_to_stage (buf, rowstride, width, height);
+
+ (*image_info->conv_d) (image, x0, y0, width, height,
+ image_info->stage_buf, STAGE_ROWSTRIDE,
+ x_align, y_align, cmap);
+}
+
+/* This is slow. Speed me up, please. */
+static void
+gdk_rgb_gray_to_stage (guchar *buf, gint rowstride, gint width, gint height)
+{
+ gint x, y;
+ guchar *pi_start, *po_start;
+ guchar *pi, *po;
+ guchar gray;
+
+ pi_start = buf;
+ po_start = gdk_rgb_ensure_stage ();
+ for (y = 0; y < height; y++)
+ {
+ pi = pi_start;
+ po = po_start;
+ for (x = 0; x < width; x++)
+ {
+ gray = *pi++;
+ *po++ = gray;
+ *po++ = gray;
+ *po++ = gray;
+ }
+ pi_start += rowstride;
+ po_start += STAGE_ROWSTRIDE;
+ }
+}
+
+/* Generic gray conversion function - convert to 24bit packed, then go
+ from there. */
+static void
+gdk_rgb_convert_gray_generic (GdkImage *image,
+ gint x0, gint y0, gint width, gint height,
+ guchar *buf, gint rowstride,
+ gint x_align, gint y_align, GdkRgbCmap *cmap)
+{
+ gdk_rgb_gray_to_stage (buf, rowstride, width, height);
+
+ (*image_info->conv) (image, x0, y0, width, height,
+ image_info->stage_buf, STAGE_ROWSTRIDE,
+ x_align, y_align, cmap);
+}
+
+static void
+gdk_rgb_convert_gray_generic_d (GdkImage *image,
+ gint x0, gint y0, gint width, gint height,
+ guchar *buf, gint rowstride,
+ gint x_align, gint y_align, GdkRgbCmap *cmap)
+{
+ gdk_rgb_gray_to_stage (buf, rowstride, width, height);
+
+ (*image_info->conv_d) (image, x0, y0, width, height,
+ image_info->stage_buf, STAGE_ROWSTRIDE,
+ x_align, y_align, cmap);
+}
+
+/* Render grayscale using indexed method. */
+static void
+gdk_rgb_convert_gray_cmap (GdkImage *image,
+ gint x0, gint y0, gint width, gint height,
+ guchar *buf, gint rowstride,
+ gint x_align, gint y_align, GdkRgbCmap *cmap)
+{
+ (*image_info->conv_indexed) (image, x0, y0, width, height,
+ buf, rowstride,
+ x_align, y_align, image_info->gray_cmap);
+}
+
+#if 0
+static void
+gdk_rgb_convert_gray_cmap_d (GdkImage *image,
+ gint x0, gint y0, gint width, gint height,
+ guchar *buf, gint rowstride,
+ gint x_align, gint y_align, GdkRgbCmap *cmap)
+{
+ (*image_info->conv_indexed_d) (image, x0, y0, width, height,
+ buf, rowstride,
+ x_align, y_align, image_info->gray_cmap);
+}
+#endif
+
+/* This is slow. Speed me up, please. */
+static void
+gdk_rgb_indexed_to_stage (guchar *buf, gint rowstride, gint width, gint height,
+ GdkRgbCmap *cmap)
+{
+ gint x, y;
+ guchar *pi_start, *po_start;
+ guchar *pi, *po;
+ gint rgb;
+
+ pi_start = buf;
+ po_start = gdk_rgb_ensure_stage ();
+ for (y = 0; y < height; y++)
+ {
+ pi = pi_start;
+ po = po_start;
+ for (x = 0; x < width; x++)
+ {
+ rgb = cmap->colors[*pi++];
+ *po++ = rgb >> 16;
+ *po++ = (rgb >> 8) & 0xff;
+ *po++ = rgb & 0xff;
+ }
+ pi_start += rowstride;
+ po_start += STAGE_ROWSTRIDE;
+ }
+}
+
+/* Generic gray conversion function - convert to 24bit packed, then go
+ from there. */
+static void
+gdk_rgb_convert_indexed_generic (GdkImage *image,
+ gint x0, gint y0, gint width, gint height,
+ guchar *buf, gint rowstride,
+ gint x_align, gint y_align, GdkRgbCmap *cmap)
+{
+ gdk_rgb_indexed_to_stage (buf, rowstride, width, height, cmap);
+
+ (*image_info->conv) (image, x0, y0, width, height,
+ image_info->stage_buf, STAGE_ROWSTRIDE,
+ x_align, y_align, cmap);
+}
+
+static void
+gdk_rgb_convert_indexed_generic_d (GdkImage *image,
+ gint x0, gint y0, gint width, gint height,
+ guchar *buf, gint rowstride,
+ gint x_align, gint y_align,
+ GdkRgbCmap *cmap)
+{
+ gdk_rgb_indexed_to_stage (buf, rowstride, width, height, cmap);
+
+ (*image_info->conv_d) (image, x0, y0, width, height,
+ image_info->stage_buf, STAGE_ROWSTRIDE,
+ x_align, y_align, cmap);
+}
+
+/* Select a conversion function based on the visual and a
+ representative image. */
+static void
+gdk_rgb_select_conv (GdkImage *image)
+{
+ GdkByteOrder byte_order;
+ gint depth, bpp, byterev;
+ GdkVisualType vtype;
+ guint32 red_mask, green_mask, blue_mask;
+ GdkRgbConvFunc conv, conv_d;
+ GdkRgbConvFunc conv_32, conv_32_d;
+ GdkRgbConvFunc conv_gray, conv_gray_d;
+ GdkRgbConvFunc conv_indexed, conv_indexed_d;
+
+ depth = image_info->visual->depth;
+ bpp = image->bpp;
+
+ byte_order = image->byte_order;
+
+#ifdef WORDS_BIGENDIAN
+ byterev = (byte_order == GDK_LSB_FIRST);
+#else
+ byterev = (byte_order == GDK_MSB_FIRST);
+#endif
+
+ vtype = image_info->visual->type;
+ if (vtype == GDK_VISUAL_DIRECT_COLOR)
+ vtype = GDK_VISUAL_TRUE_COLOR;
+
+ red_mask = image_info->visual->red_mask;
+ green_mask = image_info->visual->green_mask;
+ blue_mask = image_info->visual->blue_mask;
+
+ conv = NULL;
+ conv_d = NULL;
+
+ conv_32 = gdk_rgb_convert_32_generic;
+ conv_32_d = gdk_rgb_convert_32_generic_d;
+
+ conv_gray = gdk_rgb_convert_gray_generic;
+ conv_gray_d = gdk_rgb_convert_gray_generic_d;
+
+ conv_indexed = gdk_rgb_convert_indexed_generic;
+ conv_indexed_d = gdk_rgb_convert_indexed_generic_d;
+
+ image_info->dith_default = FALSE;
+
+ if (bpp == 2 && depth == 16 && !byterev &&
+ red_mask == 0xf800 && green_mask == 0x7e0 && blue_mask == 0x1f)
+ {
+ conv = gdk_rgb_convert_565;
+ conv_d = gdk_rgb_convert_565_d;
+ conv_gray = gdk_rgb_convert_565_gray;
+ }
+ else if (bpp == 2 && depth == 16 &&
+ vtype == GDK_VISUAL_TRUE_COLOR && byterev &&
+ red_mask == 0xf800 && green_mask == 0x7e0 && blue_mask == 0x1f)
+ conv = gdk_rgb_convert_565_br;
+
+ else if (bpp == 2 && depth == 15 &&
+ vtype == GDK_VISUAL_TRUE_COLOR && !byterev &&
+ red_mask == 0x7c00 && green_mask == 0x3e0 && blue_mask == 0x1f)
+ conv = gdk_rgb_convert_555;
+
+ else if (bpp == 2 && depth == 15 &&
+ vtype == GDK_VISUAL_TRUE_COLOR && byterev &&
+ red_mask == 0x7c00 && green_mask == 0x3e0 && blue_mask == 0x1f)
+ conv = gdk_rgb_convert_555_br;
+
+ /* I'm not 100% sure about the 24bpp tests */
+ else if (bpp == 3 && depth == 24 &&
+ vtype == GDK_VISUAL_TRUE_COLOR && byte_order == GDK_LSB_FIRST &&
+ red_mask == 0xff0000 && green_mask == 0xff00 && blue_mask == 0xff)
+ conv = gdk_rgb_convert_888_lsb;
+ else if (bpp == 3 && depth == 24 &&
+ vtype == GDK_VISUAL_TRUE_COLOR && byte_order == GDK_MSB_FIRST &&
+ red_mask == 0xff0000 && green_mask == 0xff00 && blue_mask == 0xff)
+ conv = gdk_rgb_convert_888_msb;
+ else if (bpp == 4 && depth == 24 &&
+ vtype == GDK_VISUAL_TRUE_COLOR && !byterev &&
+ red_mask == 0xff0000 && green_mask == 0xff00 && blue_mask == 0xff)
+ conv = gdk_rgb_convert_0888;
+ else if (bpp == 4 && depth == 24 &&
+ vtype == GDK_VISUAL_TRUE_COLOR && byterev &&
+ red_mask == 0xff0000 && green_mask == 0xff00 && blue_mask == 0xff)
+ conv = gdk_rgb_convert_0888_br;
+
+ else if (vtype == GDK_VISUAL_TRUE_COLOR && byte_order == GDK_LSB_FIRST)
+ {
+ conv = gdk_rgb_convert_truecolor_lsb;
+ conv_d = gdk_rgb_convert_truecolor_lsb_d;
+ }
+ else if (vtype == GDK_VISUAL_TRUE_COLOR && byte_order == GDK_MSB_FIRST)
+ {
+ conv = gdk_rgb_convert_truecolor_msb;
+ conv = gdk_rgb_convert_truecolor_msb_d;
+ }
+ else if (bpp == 1 && depth == 8 && (vtype == GDK_VISUAL_PSEUDO_COLOR
+#ifdef ENABLE_GRAYSCALE
+ || vtype == GDK_VISUAL_GRAYSCALE
+#endif
+ ))
+ {
+ image_info->dith_default = TRUE;
+ conv = gdk_rgb_convert_8;
+ if (vtype != GDK_VISUAL_GRAYSCALE)
+ {
+ if (image_info->nred_shades == 6 &&
+ image_info->ngreen_shades == 6 &&
+ image_info->nblue_shades == 6)
+ conv_d = gdk_rgb_convert_8_d666;
+ else
+ conv_d = gdk_rgb_convert_8_d;
+ }
+ conv_indexed = gdk_rgb_convert_8_indexed;
+ conv_gray = gdk_rgb_convert_gray_cmap;
+ }
+ else if (bpp == 1 && depth == 8 && (vtype == GDK_VISUAL_STATIC_GRAY
+#ifdef not_ENABLE_GRAYSCALE
+ || vtype == GDK_VISUAL_GRAYSCALE
+#endif
+ ))
+ {
+ conv = gdk_rgb_convert_gray8;
+ conv_gray = gdk_rgb_convert_gray8_gray;
+ }
+
+ if (conv_d == NULL)
+ conv_d = conv;
+
+ image_info->conv = conv;
+ image_info->conv_d = conv_d;
+
+ image_info->conv_32 = conv_32;
+ image_info->conv_32_d = conv_32_d;
+
+ image_info->conv_gray = conv_gray;
+ image_info->conv_gray_d = conv_gray_d;
+
+ image_info->conv_indexed = conv_indexed;
+ image_info->conv_indexed_d = conv_indexed_d;
+}
+
+static gint horiz_idx;
+static gint horiz_y = IMAGE_HEIGHT;
+static gint vert_idx;
+static gint vert_x = IMAGE_WIDTH;
+static gint tile_idx;
+static gint tile_x = IMAGE_WIDTH;
+static gint tile_y1 = IMAGE_HEIGHT;
+static gint tile_y2 = IMAGE_HEIGHT;
+
+#ifdef VERBOSE
+static gint sincelast;
+#endif
+
+/* Defining NO_FLUSH can cause inconsistent screen updates, but is useful
+ for performance evaluation. */
+
+#undef NO_FLUSH
+
+static gint
+gdk_rgb_alloc_scratch_image (void)
+{
+ if (static_image_idx == N_IMAGES)
+ {
+#ifndef NO_FLUSH
+ gdk_flush ();
+#endif
+#ifdef VERBOSE
+ g_print ("flush, %d puts since last flush\n", sincelast);
+ sincelast = 0;
+#endif
+ static_image_idx = 0;
+ horiz_y = IMAGE_HEIGHT;
+ vert_x = IMAGE_WIDTH;
+ tile_x = IMAGE_WIDTH;
+ tile_y1 = tile_y2 = IMAGE_HEIGHT;
+ }
+ return static_image_idx++;
+}
+
+static GdkImage *
+gdk_rgb_alloc_scratch (gint width, gint height, gint *x0, gint *y0)
+{
+ GdkImage *image;
+ gint idx;
+
+
+ if (width >= (IMAGE_WIDTH >> 1))
+ {
+ if (height >= (IMAGE_HEIGHT >> 1))
+ {
+ idx = gdk_rgb_alloc_scratch_image ();
+ *x0 = 0;
+ *y0 = 0;
+ }
+ else
+ {
+ if (height + horiz_y > IMAGE_HEIGHT)
+ {
+ horiz_idx = gdk_rgb_alloc_scratch_image ();
+ horiz_y = 0;
+ }
+ idx = horiz_idx;
+ *x0 = 0;
+ *y0 = horiz_y;
+ horiz_y += height;
+ }
+ }
+ else
+ {
+ if (height >= (IMAGE_HEIGHT >> 1))
+ {
+ if (width + vert_x > IMAGE_WIDTH)
+ {
+ vert_idx = gdk_rgb_alloc_scratch_image ();
+ vert_x = 0;
+ }
+ idx = vert_idx;
+ *x0 = vert_x;
+ *y0 = 0;
+ vert_x += (width + 3) & -4;
+ }
+ else
+ {
+ if (width + tile_x > IMAGE_WIDTH)
+ {
+ tile_y1 = tile_y2;
+ tile_x = 0;
+ }
+ if (height + tile_y1 > IMAGE_HEIGHT)
+ {
+ tile_idx = gdk_rgb_alloc_scratch_image ();
+ tile_x = 0;
+ tile_y1 = 0;
+ tile_y2 = 0;
+ }
+ if (height + tile_y1 > tile_y2)
+ tile_y2 = height + tile_y1;
+ idx = tile_idx;
+ *x0 = tile_x;
+ *y0 = tile_y1;
+ tile_x += (width + 3) & -4;
+ }
+ }
+ image = static_image[idx];
+#ifdef VERBOSE
+ g_print ("index %d, x %d, y %d (%d x %d)\n", idx, *x0, *y0, width, height);
+ sincelast++;
+#endif
+ return image;
+}
+
+static void
+gdk_draw_rgb_image_core (GdkDrawable *drawable,
+ GdkGC *gc,
+ gint x,
+ gint y,
+ gint width,
+ gint height,
+ guchar *buf,
+ gint pixstride,
+ gint rowstride,
+ GdkRgbConvFunc conv,
+ GdkRgbCmap *cmap)
+{
+ gint y0, x0;
+ gint xs0, ys0;
+ GdkImage *image;
+ gint width1, height1;
+ guchar *buf_ptr;
+
+ for (y0 = 0; y0 < height; y0 += IMAGE_HEIGHT)
+ {
+ height1 = MIN (height - y0, IMAGE_HEIGHT);
+ for (x0 = 0; x0 < width; x0 += IMAGE_WIDTH)
+ {
+ width1 = MIN (width - x0, IMAGE_WIDTH);
+ buf_ptr = buf + y0 * rowstride + x0 * pixstride;
+
+ image = gdk_rgb_alloc_scratch (width1, height1, &xs0, &ys0);
+
+ conv (image, xs0, ys0, width1, height1, buf_ptr, rowstride,
+ x + x0, y + y0, cmap);
+
+ gdk_draw_image (drawable, gc,
+ image, xs0, ys0, x + x0, y + y0, width1, height1);
+ }
+ }
+}
+
+
+void
+gdk_draw_rgb_image (GdkDrawable *drawable,
+ GdkGC *gc,
+ gint x,
+ gint y,
+ gint width,
+ gint height,
+ GdkRgbDither dith,
+ guchar *rgb_buf,
+ gint rowstride)
+{
+ if (dith == GDK_RGB_DITHER_NONE || (dith == GDK_RGB_DITHER_NORMAL &&
+ !image_info->dith_default))
+ gdk_draw_rgb_image_core (drawable, gc, x, y, width, height,
+ rgb_buf, 3, rowstride, image_info->conv, NULL);
+ else
+ gdk_draw_rgb_image_core (drawable, gc, x, y, width, height,
+ rgb_buf, 3, rowstride, image_info->conv_d, NULL);
+}
+
+void
+gdk_draw_rgb_32_image (GdkDrawable *drawable,
+ GdkGC *gc,
+ gint x,
+ gint y,
+ gint width,
+ gint height,
+ GdkRgbDither dith,
+ guchar *buf,
+ gint rowstride)
+{
+ if (dith == GDK_RGB_DITHER_NONE || (dith == GDK_RGB_DITHER_NORMAL &&
+ !image_info->dith_default))
+ gdk_draw_rgb_image_core (drawable, gc, x, y, width, height,
+ buf, 4, rowstride,
+ image_info->conv_32, NULL);
+ else
+ gdk_draw_rgb_image_core (drawable, gc, x, y, width, height,
+ buf, 4, rowstride,
+ image_info->conv_32_d, NULL);
+}
+
+static void
+gdk_rgb_make_gray_cmap (GdkRgbInfo *info)
+{
+ guint32 rgb[256];
+ gint i;
+
+ for (i = 0; i < 256; i++)
+ rgb[i] = (i << 16) | (i << 8) | i;
+ info->gray_cmap = gdk_rgb_cmap_new (rgb, 256);
+}
+
+void
+gdk_draw_gray_image (GdkDrawable *drawable,
+ GdkGC *gc,
+ gint x,
+ gint y,
+ gint width,
+ gint height,
+ GdkRgbDither dith,
+ guchar *buf,
+ gint rowstride)
+{
+ if (image_info->bpp == 1 &&
+ image_info->gray_cmap == NULL &&
+ (image_info->visual->type == GDK_VISUAL_PSEUDO_COLOR ||
+ image_info->visual->type == GDK_VISUAL_GRAYSCALE))
+ gdk_rgb_make_gray_cmap (image_info);
+
+ if (dith == GDK_RGB_DITHER_NONE || (dith == GDK_RGB_DITHER_NORMAL &&
+ !image_info->dith_default))
+ gdk_draw_rgb_image_core (drawable, gc, x, y, width, height,
+ buf, 1, rowstride,
+ image_info->conv_gray, NULL);
+ else
+ gdk_draw_rgb_image_core (drawable, gc, x, y, width, height,
+ buf, 1, rowstride,
+ image_info->conv_gray_d, NULL);
+}
+
+GdkRgbCmap *
+gdk_rgb_cmap_new (guint32 *colors, gint n_colors)
+{
+ GdkRgbCmap *cmap;
+ int i, j;
+ guint32 rgb;
+
+ g_return_val_if_fail (n_colors >= 0, NULL);
+ g_return_val_if_fail (n_colors <= 256, NULL);
+ cmap = g_new (GdkRgbCmap, 1);
+ memcpy (cmap->colors, colors, n_colors * sizeof(guint32));
+ if (image_info->bpp == 1 &&
+ (image_info->visual->type == GDK_VISUAL_PSEUDO_COLOR ||
+ image_info->visual->type == GDK_VISUAL_GRAYSCALE))
+ for (i = 0; i < n_colors; i++)
+ {
+ rgb = colors[i];
+ j = ((rgb & 0xf00000) >> 12) |
+ ((rgb & 0xf000) >> 8) |
+ ((rgb & 0xf0) >> 4);
+#ifdef VERBOSE
+ g_print ("%d %x %x %d\n", i, j, colorcube[j]);
+#endif
+ cmap->lut[i] = colorcube[j];
+ }
+ return cmap;
+}
+
+void
+gdk_rgb_cmap_free (GdkRgbCmap *cmap)
+{
+ g_free (cmap);
+}
+
+void
+gdk_draw_indexed_image (GdkDrawable *drawable,
+ GdkGC *gc,
+ gint x,
+ gint y,
+ gint width,
+ gint height,
+ GdkRgbDither dith,
+ guchar *buf,
+ gint rowstride,
+ GdkRgbCmap *cmap)
+{
+ if (dith == GDK_RGB_DITHER_NONE || (dith == GDK_RGB_DITHER_NORMAL &&
+ !image_info->dith_default))
+ gdk_draw_rgb_image_core (drawable, gc, x, y, width, height,
+ buf, 1, rowstride,
+ image_info->conv_indexed, cmap);
+ else
+ gdk_draw_rgb_image_core (drawable, gc, x, y, width, height,
+ buf, 1, rowstride,
+ image_info->conv_indexed_d, cmap);
+}
+
+gboolean
+gdk_rgb_ditherable (void)
+{
+ return (image_info->conv != image_info->conv_d);
+}
+
+GdkColormap *
+gdk_rgb_get_cmap (void)
+{
+ return image_info->cmap;
+}
+
+GdkVisual *
+gdk_rgb_get_visual (void)
+{
+ return image_info->visual;
+}
projects / ~andy / gtk / commitdiff