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change to use spiffy gradient code.

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2002-01-06  Havoc Pennington  <hp@pobox.com>

	* src/theme.c (meta_theme_get_gradient): change to use spiffy
	gradient code.

	* src/gradient.c: copy lovely gradient code from WindowMaker,
	as usual Dan and Alfredo have very nice code
This commit is contained in:
Havoc Pennington 2002-01-06 17:52:21 +00:00 committed by Havoc Pennington
parent d9934a2d8c
commit ac85e1e225
8 changed files with 1248 additions and 53 deletions
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8
ChangeLog
View File

@ -1,3 +1,11 @@
2002-01-06 Havoc Pennington <hp@pobox.com>
* src/theme.c (meta_theme_get_gradient): change to use spiffy
gradient code.
* src/gradient.c: copy lovely gradient code from WindowMaker,
as usual Dan and Alfredo have very nice code
2002-01-06 Fatih Demir <kabalak@gtranslator.org>
* configure.in: Added "tr" to the languages list.

8
src/Makefile.am
View File

@ -21,6 +21,8 @@ metacity_SOURCES= \
frame.h \
frames.c \
frames.h \
gradient.c \
gradient.h \
inlinepixbufs.h \
keybindings.c \
keybindings.h \
@ -57,6 +59,12 @@ bin_PROGRAMS=metacity
metacity_LDADD= @METACITY_LIBS@
testgradient_SOURCES=gradient.h gradient.c testgradient.c
noinst_PROGRAMS=testgradient
testgradient_LDADD= @METACITY_LIBS@
desktopfilesdir=$(datadir)/gnome/wm-properties
desktopfiles_DATA=metacity.desktop

63
src/frames.c
View File

@ -1758,41 +1758,42 @@ meta_frames_expose_event (GtkWidget *widget,
layout_gc = widget->style->fg_gc[GTK_STATE_NORMAL];
if (flags & META_FRAME_HAS_FOCUS)
{
GdkPixbuf *gradient;
layout_gc = widget->style->fg_gc[GTK_STATE_SELECTED];
#if 0
/* Draw blue background */
gdk_draw_rectangle (frame->window,
widget->style->bg_gc[GTK_STATE_SELECTED],
TRUE,
fgeom.title_rect.x,
fgeom.title_rect.y,
fgeom.title_rect.width,
fgeom.title_rect.height);
#else
{
GdkPixbuf *gradient;
gradient = meta_theme_get_gradient (META_GRADIENT_DIAGONAL,
&widget->style->bg[GTK_STATE_SELECTED],
&widget->style->bg[GTK_STATE_NORMAL],
fgeom.title_rect.width,
fgeom.title_rect.height);
gradient = meta_theme_get_gradient (META_GRADIENT_HORIZONTAL,
&widget->style->bg[GTK_STATE_SELECTED],
&widget->style->bg[GTK_STATE_NORMAL],
fgeom.title_rect.width,
fgeom.title_rect.height);
if (gradient != NULL)
{
gdk_pixbuf_render_to_drawable (gradient,
frame->window,
widget->style->bg_gc[GTK_STATE_SELECTED],
0, 0,
fgeom.title_rect.x,
fgeom.title_rect.y,
fgeom.title_rect.width,
fgeom.title_rect.height,
GDK_RGB_DITHER_NORMAL,
0, 0);
gdk_pixbuf_render_to_drawable (gradient,
frame->window,
widget->style->bg_gc[GTK_STATE_SELECTED],
0, 0,
fgeom.title_rect.x,
fgeom.title_rect.y,
fgeom.title_rect.width,
fgeom.title_rect.height,
GDK_RGB_DITHER_NORMAL,
0, 0);
g_object_unref (G_OBJECT (gradient));
}
#endif
g_object_unref (G_OBJECT (gradient));
}
else
{
/* Fallback to plain selection color */
gdk_draw_rectangle (frame->window,
widget->style->bg_gc[GTK_STATE_SELECTED],
TRUE,
fgeom.title_rect.x,
fgeom.title_rect.y,
fgeom.title_rect.width,
fgeom.title_rect.height);
}
}
if (frame->layout)

853
src/gradient.c Normal file
View File

@ -0,0 +1,853 @@
/* Metacity gradient rendering */
/*
* Copyright (C) 2001 Havoc Pennington, 99% copied from wrlib in
* WindowMaker, Copyright (C) 1997-2000 Dan Pascu and Alfredo Kojima
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or (at your option) any later version.
*
* This program 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
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
* 02111-1307, USA. */
#include "gradient.h"
#include <string.h>
/* This is all Alfredo's and Dan's usual very nice WindowMaker code,
* slightly GTK-ized
*/
static GdkPixbuf* meta_gradient_create_horizontal (int width,
int height,
const GdkColor *from,
const GdkColor *to);
static GdkPixbuf* meta_gradient_create_vertical (int width,
int height,
const GdkColor *from,
const GdkColor *to);
static GdkPixbuf* meta_gradient_create_diagonal (int width,
int height,
const GdkColor *from,
const GdkColor *to);
static GdkPixbuf* meta_gradient_create_multi_horizontal (int width,
int height,
const GdkColor *colors,
int count);
static GdkPixbuf* meta_gradient_create_multi_vertical (int width,
int height,
const GdkColor *colors,
int count);
static GdkPixbuf* meta_gradient_create_multi_diagonal (int width,
int height,
const GdkColor *colors,
int count);
/* Used as the destroy notification function for gdk_pixbuf_new() */
static void
free_buffer (guchar *pixels, gpointer data)
{
g_free (pixels);
}
static GdkPixbuf*
blank_pixbuf (int width, int height, gboolean no_padding)
{
guchar *buf;
int rowstride;
g_return_val_if_fail (width > 0, NULL);
g_return_val_if_fail (height > 0, NULL);
if (no_padding)
rowstride = width * 3;
else
/* Always align rows to 32-bit boundaries */
rowstride = 4 * ((3 * width + 3) / 4);
buf = g_try_malloc (height * rowstride);
if (!buf)
return NULL;
return gdk_pixbuf_new_from_data (buf, GDK_COLORSPACE_RGB,
FALSE, 8,
width, height, rowstride,
free_buffer, NULL);
}
GdkPixbuf*
meta_gradient_create_simple (int width,
int height,
const GdkColor *from,
const GdkColor *to,
MetaGradientType style)
{
switch (style)
{
case META_GRADIENT_HORIZONTAL:
return meta_gradient_create_horizontal (width, height,
from, to);
case META_GRADIENT_VERTICAL:
return meta_gradient_create_vertical (width, height,
from, to);
case META_GRADIENT_DIAGONAL:
return meta_gradient_create_diagonal (width, height,
from, to);
}
g_assert_not_reached ();
return NULL;
}
GdkPixbuf*
meta_gradient_create_multi (int width,
int height,
const GdkColor *colors,
int n_colors,
MetaGradientType style)
{
if (n_colors > 2)
{
switch (style)
{
case META_GRADIENT_HORIZONTAL:
return meta_gradient_create_multi_horizontal (width, height, colors, n_colors);
case META_GRADIENT_VERTICAL:
return meta_gradient_create_multi_vertical (width, height, colors, n_colors);
case META_GRADIENT_DIAGONAL:
return meta_gradient_create_multi_diagonal (width, height, colors, n_colors);
}
}
else if (n_colors > 1)
{
return meta_gradient_create_simple (width, height, &colors[0], &colors[1],
style);
}
else if (n_colors > 0)
{
return meta_gradient_create_simple (width, height, &colors[0], &colors[0],
style);
}
g_assert_not_reached ();
return NULL;
}
/* Interwoven essentially means we have two vertical gradients,
* cut into horizontal strips of the given thickness, and then the strips
* are alternated. I'm not sure what it's good for, just copied since
* WindowMaker had it.
*/
GdkPixbuf*
meta_gradient_create_interwoven (int width,
int height,
const GdkColor colors1[2],
int thickness1,
const GdkColor colors2[2],
int thickness2)
{
int i, j, k, l, ll;
long r1, g1, b1, dr1, dg1, db1;
long r2, g2, b2, dr2, dg2, db2;
GdkPixbuf *pixbuf;
unsigned char *ptr;
unsigned char rr, gg, bb;
unsigned char *pixels;
int rowstride;
pixbuf = blank_pixbuf (width, height, FALSE);
if (pixbuf == NULL)
return NULL;
pixels = gdk_pixbuf_get_pixels (pixbuf);
rowstride = gdk_pixbuf_get_rowstride (pixbuf);
r1 = colors1[0].red<<8;
g1 = colors1[0].green<<8;
b1 = colors1[0].blue<<8;
r2 = colors2[0].red<<8;
g2 = colors2[0].green<<8;
b2 = colors2[0].blue<<8;
dr1 = ((colors1[1].red-colors1[0].red)<<8)/(int)height;
dg1 = ((colors1[1].green-colors1[0].green)<<8)/(int)height;
db1 = ((colors1[1].blue-colors1[0].blue)<<8)/(int)height;
dr2 = ((colors2[1].red-colors2[0].red)<<8)/(int)height;
dg2 = ((colors2[1].green-colors2[0].green)<<8)/(int)height;
db2 = ((colors2[1].blue-colors2[0].blue)<<8)/(int)height;
for (i=0,k=0,l=0,ll=thickness1; i<height; i++)
{
ptr = pixels + i * rowstride;
if (k == 0)
{
rr = r1>>16;
gg = g1>>16;
bb = b1>>16;
}
else
{
rr = r2>>16;
gg = g2>>16;
bb = b2>>16;
}
for (j=0; j<width/8; j++)
{
*(ptr++) = rr; *(ptr++) = gg; *(ptr++) = bb;
*(ptr++) = rr; *(ptr++) = gg; *(ptr++) = bb;
*(ptr++) = rr; *(ptr++) = gg; *(ptr++) = bb;
*(ptr++) = rr; *(ptr++) = gg; *(ptr++) = bb;
*(ptr++) = rr; *(ptr++) = gg; *(ptr++) = bb;
*(ptr++) = rr; *(ptr++) = gg; *(ptr++) = bb;
*(ptr++) = rr; *(ptr++) = gg; *(ptr++) = bb;
*(ptr++) = rr; *(ptr++) = gg; *(ptr++) = bb;
}
switch (width%8)
{
case 7: *(ptr++) = rr; *(ptr++) = gg; *(ptr++) = bb;
case 6: *(ptr++) = rr; *(ptr++) = gg; *(ptr++) = bb;
case 5: *(ptr++) = rr; *(ptr++) = gg; *(ptr++) = bb;
case 4: *(ptr++) = rr; *(ptr++) = gg; *(ptr++) = bb;
case 3: *(ptr++) = rr; *(ptr++) = gg; *(ptr++) = bb;
case 2: *(ptr++) = rr; *(ptr++) = gg; *(ptr++) = bb;
case 1: *(ptr++) = rr; *(ptr++) = gg; *(ptr++) = bb;
}
if (++l == ll)
{
if (k == 0)
{
k = 1;
ll = thickness2;
}
else
{
k = 0;
ll = thickness1;
}
l = 0;
}
r1+=dr1;
g1+=dg1;
b1+=db1;
r2+=dr2;
g2+=dg2;
b2+=db2;
}
return pixbuf;
}
/*
*----------------------------------------------------------------------
* meta_gradient_create_horizontal--
* Renders a horizontal linear gradient of the specified size in the
* GdkPixbuf format with a border of the specified type.
*
* Returns:
* A 24bit GdkPixbuf with the gradient (no alpha channel).
*
* Side effects:
* None
*----------------------------------------------------------------------
*/
static GdkPixbuf*
meta_gradient_create_horizontal (int width, int height,
const GdkColor *from,
const GdkColor *to)
{
int i;
long r, g, b, dr, dg, db;
GdkPixbuf *pixbuf;
unsigned char *ptr;
unsigned char *pixels;
int r0, g0, b0;
int rf, gf, bf;
int rowstride;
/* FIXME the no_padding = TRUE here is a workaround for a problem
* create_diagonal that can't handle a funky rowstride
*/
pixbuf = blank_pixbuf (width, height, TRUE);
if (pixbuf == NULL)
return NULL;
pixels = gdk_pixbuf_get_pixels (pixbuf);
ptr = pixels;
rowstride = gdk_pixbuf_get_rowstride (pixbuf);
r0 = (guchar) (from->red / 256.0);
g0 = (guchar) (from->green / 256.0);
b0 = (guchar) (from->blue / 256.0);
rf = (guchar) (to->red / 256.0);
gf = (guchar) (to->green / 256.0);
bf = (guchar) (to->blue / 256.0);
r = r0 << 16;
g = g0 << 16;
b = b0 << 16;
dr = ((rf-r0)<<16)/(int)width;
dg = ((gf-g0)<<16)/(int)width;
db = ((bf-b0)<<16)/(int)width;
/* render the first line */
for (i=0; i<width; i++)
{
*(ptr++) = (unsigned char)(r>>16);
*(ptr++) = (unsigned char)(g>>16);
*(ptr++) = (unsigned char)(b>>16);
r += dr;
g += dg;
b += db;
}
/* copy the first line to the other lines */
for (i=1; i<height; i++)
{
memcpy (&(pixels[i*rowstride]), pixels, rowstride);
}
return pixbuf;
}
/*
*----------------------------------------------------------------------
* meta_gradient_create_vertical--
* Renders a vertical linear gradient of the specified size in the
* GdkPixbuf format with a border of the specified type.
*
* Returns:
* A 24bit GdkPixbuf with the gradient (no alpha channel).
*
* Side effects:
* None
*----------------------------------------------------------------------
*/
static GdkPixbuf*
meta_gradient_create_vertical (int width, int height,
const GdkColor *from,
const GdkColor *to)
{
int i, j;
long r, g, b, dr, dg, db;
GdkPixbuf *pixbuf;
unsigned char *ptr;
unsigned char rr, gg, bb;
int r0, g0, b0;
int rf, gf, bf;
int rowstride;
unsigned char *pixels;
pixbuf = blank_pixbuf (width, height, FALSE);
if (pixbuf == NULL)
return NULL;
pixels = gdk_pixbuf_get_pixels (pixbuf);
rowstride = gdk_pixbuf_get_rowstride (pixbuf);
r0 = (guchar) (from->red / 256.0);
g0 = (guchar) (from->green / 256.0);
b0 = (guchar) (from->blue / 256.0);
rf = (guchar) (to->red / 256.0);
gf = (guchar) (to->green / 256.0);
bf = (guchar) (to->blue / 256.0);
r = r0<<16;
g = g0<<16;
b = b0<<16;
dr = ((rf-r0)<<16)/(int)height;
dg = ((gf-g0)<<16)/(int)height;
db = ((bf-b0)<<16)/(int)height;
for (i=0; i<height; i++)
{
ptr = pixels + i * rowstride;
rr = r>>16;
gg = g>>16;
bb = b>>16;
for (j=0; j<width/8; j++)
{
*(ptr++) = rr; *(ptr++) = gg; *(ptr++) = bb;
*(ptr++) = rr; *(ptr++) = gg; *(ptr++) = bb;
*(ptr++) = rr; *(ptr++) = gg; *(ptr++) = bb;
*(ptr++) = rr; *(ptr++) = gg; *(ptr++) = bb;
*(ptr++) = rr; *(ptr++) = gg; *(ptr++) = bb;
*(ptr++) = rr; *(ptr++) = gg; *(ptr++) = bb;
*(ptr++) = rr; *(ptr++) = gg; *(ptr++) = bb;
*(ptr++) = rr; *(ptr++) = gg; *(ptr++) = bb;
}
switch (width%8)
{
case 7: *(ptr++) = rr; *(ptr++) = gg; *(ptr++) = bb;
case 6: *(ptr++) = rr; *(ptr++) = gg; *(ptr++) = bb;
case 5: *(ptr++) = rr; *(ptr++) = gg; *(ptr++) = bb;
case 4: *(ptr++) = rr; *(ptr++) = gg; *(ptr++) = bb;
case 3: *(ptr++) = rr; *(ptr++) = gg; *(ptr++) = bb;
case 2: *(ptr++) = rr; *(ptr++) = gg; *(ptr++) = bb;
case 1: *(ptr++) = rr; *(ptr++) = gg; *(ptr++) = bb;
}
r+=dr;
g+=dg;
b+=db;
}
return pixbuf;
}
/*
*----------------------------------------------------------------------
* meta_gradient_create_diagonal--
* Renders a diagonal linear gradient of the specified size in the
* GdkPixbuf format with a border of the specified type.
*
* Returns:
* A 24bit GdkPixbuf with the gradient (no alpha channel).
*
* Side effects:
* None
*----------------------------------------------------------------------
*/
static GdkPixbuf*
meta_gradient_create_diagonal (int width, int height,
const GdkColor *from,
const GdkColor *to)
{
GdkPixbuf *pixbuf, *tmp;
int j;
float a, offset;
unsigned char *ptr;
int r0, g0, b0;
int rf, gf, bf;
unsigned char *pixels;
int rowstride;
if (width == 1)
return meta_gradient_create_vertical (width, height, from, to);
else if (height == 1)
return meta_gradient_create_horizontal (width, height, from, to);
pixbuf = blank_pixbuf (width, height, FALSE);
if (pixbuf == NULL)
return NULL;
pixels = gdk_pixbuf_get_pixels (pixbuf);
rowstride = gdk_pixbuf_get_rowstride (pixbuf);
/* FIXME here is the pixbuf that we require to have width == rowstride
* resulting in no_padding = TRUE in create_horizontal
*/
tmp = meta_gradient_create_horizontal (2*width-1, 1, from, to);
if (!tmp)
{
g_object_unref (G_OBJECT (pixbuf));
return NULL;
}
r0 = (guchar) (from->red / 256.0);
g0 = (guchar) (from->green / 256.0);
b0 = (guchar) (from->blue / 256.0);
rf = (guchar) (to->red / 256.0);
gf = (guchar) (to->green / 256.0);
bf = (guchar) (to->blue / 256.0);
ptr = gdk_pixbuf_get_pixels (tmp);
a = ((float)(width - 1))/((float)(height - 1));
width = width * 3;
/* copy the first line to the other lines with corresponding offset */
for (j=0, offset=0.0; j<rowstride*height; j += rowstride)
{
/* FIXME this algorithm assumes rowstride == width in the source
* pixbuf, because otherwise we'd accidentally copy junk pixels.
*/
memcpy (&(pixels[j]), &ptr[3*(int)offset], width);
offset += a;
}
g_object_unref (G_OBJECT (tmp));
return pixbuf;
}
static GdkPixbuf*
meta_gradient_create_multi_horizontal (int width, int height,
const GdkColor *colors,
int count)
{
int i, j, k;
long r, g, b, dr, dg, db;
GdkPixbuf *pixbuf;
unsigned char *ptr;
unsigned char *pixels;
int width2;
int rowstride;
g_return_val_if_fail (count > 2, NULL);
pixbuf = blank_pixbuf (width, height, FALSE);
if (pixbuf == NULL)
return NULL;
pixels = gdk_pixbuf_get_pixels (pixbuf);
rowstride = gdk_pixbuf_get_rowstride (pixbuf);
ptr = pixels;
if (count > width)
count = width;
if (count > 1)
width2 = width/(count-1);
else
width2 = width;
k = 0;
r = colors[0].red << 8;
g = colors[0].green << 8;
b = colors[0].blue << 8;
/* render the first line */
for (i=1; i<count; i++)
{
dr = ((int)(colors[i].red - colors[i-1].red) <<8)/(int)width2;
dg = ((int)(colors[i].green - colors[i-1].green)<<8)/(int)width2;
db = ((int)(colors[i].blue - colors[i-1].blue) <<8)/(int)width2;
for (j=0; j<width2; j++)
{
*ptr++ = (unsigned char)(r>>16);
*ptr++ = (unsigned char)(g>>16);
*ptr++ = (unsigned char)(b>>16);
r += dr;
g += dg;
b += db;
k++;
}
r = colors[i].red << 8;
g = colors[i].green << 8;
b = colors[i].blue << 8;
}
for (j=k; j<width; j++)
{
*ptr++ = (unsigned char)(r>>16);
*ptr++ = (unsigned char)(g>>16);
*ptr++ = (unsigned char)(b>>16);
}
/* copy the first line to the other lines */
for (i=1; i<height; i++)
{
memcpy (&(pixels[i*rowstride]), pixels, rowstride);
}
return pixbuf;
}
static GdkPixbuf*
meta_gradient_create_multi_vertical (int width, int height,
const GdkColor *colors,
int count)
{
int i, j, k;
long r, g, b, dr, dg, db;
GdkPixbuf *pixbuf;
unsigned char *ptr, *tmp, *pixels;
int height2;
int x;
unsigned char rr, gg, bb;
int rowstride;
int pad;
g_return_val_if_fail (count > 2, NULL);
pixbuf = blank_pixbuf (width, height, FALSE);
if (pixbuf == NULL)
return NULL;
pixels = gdk_pixbuf_get_pixels (pixbuf);
rowstride = gdk_pixbuf_get_rowstride (pixbuf);
pad = rowstride - (width * 3);
ptr = pixels;
if (count > height)
count = height;
if (count > 1)
height2 = height/(count-1);
else
height2 = height;
k = 0;
r = colors[0].red << 8;
g = colors[0].green << 8;
b = colors[0].blue << 8;
for (i=1; i<count; i++)
{
dr = ((int)(colors[i].red - colors[i-1].red) <<8)/(int)height2;
dg = ((int)(colors[i].green - colors[i-1].green)<<8)/(int)height2;
db = ((int)(colors[i].blue - colors[i-1].blue) <<8)/(int)height2;
for (j=0; j<height2; j++)
{
rr = r>>16;
gg = g>>16;
bb = b>>16;
for (x=0; x<width/4; x++)
{
*ptr++ = rr; *ptr++ = gg; *ptr++ = bb;
*ptr++ = rr; *ptr++ = gg; *ptr++ = bb;
*ptr++ = rr; *ptr++ = gg; *ptr++ = bb;
*ptr++ = rr; *ptr++ = gg; *ptr++ = bb;
}
switch (width%4)
{
case 3: *ptr++ = rr; *ptr++ = gg; *ptr++ = bb;
case 2: *ptr++ = rr; *ptr++ = gg; *ptr++ = bb;
case 1: *ptr++ = rr; *ptr++ = gg; *ptr++ = bb;
}
ptr += pad;
r += dr;
g += dg;
b += db;
k++;
}
r = colors[i].red << 8;
g = colors[i].green << 8;
b = colors[i].blue << 8;
}
rr = r>>16;
gg = g>>16;
bb = b>>16;
if (k<height)
{
tmp = ptr;
for (x=0; x<width/4; x++)
{
*ptr++ = rr; *ptr++ = gg; *ptr++ = bb;
*ptr++ = rr; *ptr++ = gg; *ptr++ = bb;
*ptr++ = rr; *ptr++ = gg; *ptr++ = bb;
*ptr++ = rr; *ptr++ = gg; *ptr++ = bb;
}
switch (width%4)
{
case 3: *ptr++ = rr; *ptr++ = gg; *ptr++ = bb;
case 2: *ptr++ = rr; *ptr++ = gg; *ptr++ = bb;
case 1: *ptr++ = rr; *ptr++ = gg; *ptr++ = bb;
default: break;
}
ptr += pad;
for (j=k+1; j<height; j++)
{
memcpy (ptr, tmp, rowstride);
ptr += rowstride;
}
}
return pixbuf;
}
static GdkPixbuf*
meta_gradient_create_multi_diagonal (int width, int height,
const GdkColor *colors,
int count)
{
GdkPixbuf *pixbuf, *tmp;
float a, offset;
int j;
unsigned char *ptr;
unsigned char *pixels;
int rowstride;
g_return_val_if_fail (count > 2, NULL);
if (width == 1)
return meta_gradient_create_multi_vertical (width, height, colors, count);
else if (height == 1)
return meta_gradient_create_multi_horizontal (width, height, colors, count);
pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, FALSE, 8,
width, height);
if (pixbuf == NULL)
return NULL;
pixels = gdk_pixbuf_get_pixels (pixbuf);
rowstride = gdk_pixbuf_get_rowstride (pixbuf);
if (count > width)
count = width;
if (count > height)
count = height;
/* FIXME here again is a bug that requires multi_horizontal
* to have width == rowstride
*/
if (count > 2)
tmp = meta_gradient_create_multi_horizontal (2*width-1, 1, colors, count);
else
/* wrlib multiplies these colors by 256 before passing them in, but
* I think it's a bug in wrlib, so changed here. I could be wrong
* though, if we notice two-color multi diagonals not working.
*/
tmp = meta_gradient_create_horizontal (2*width-1, 1,
&colors[0], &colors[1]);
if (!tmp)
{
g_object_unref (G_OBJECT (pixbuf));
return NULL;
}
ptr = gdk_pixbuf_get_pixels (tmp);
a = ((float)(width - 1))/((float)(height - 1));
width = width * 3;
/* copy the first line to the other lines with corresponding offset */
for (j=0, offset=0; j<rowstride*height; j += rowstride)
{
memcpy (&(pixels[j]), &ptr[3*(int)offset], width);
offset += a;
}
g_object_unref (G_OBJECT (tmp));
return pixbuf;
}
#ifdef META_TEST_GRADIENTS
#include <gtk/gtk.h>
typedef void (* RenderGradientFunc) (GdkDrawable *drawable,
GdkGC *gc,
int width,
int height);
static void
render_simple (GdkDrawable *drawable,
GdkGC *gc,
int width, int height,
MetaGradientType type)
{
GdkPixbuf *pixbuf;
GdkColor from, to;
gdk_color_parse ("blue", &from);
gdk_color_parse ("green", &to);
pixbuf = meta_gradient_create_simple (width, height,
&from, &to,
type);
gdk_pixbuf_render_to_drawable (pixbuf,
drawable,
gc,
0, 0,
0, 0, width, height,
GDK_RGB_DITHER_NORMAL,
0, 0);
g_object_unref (G_OBJECT (pixbuf));
}
static void
render_vertical_func (GdkDrawable *drawable,
GdkGC *gc,
int width, int height)
{
render_simple (drawable, gc, width, height, META_GRADIENT_VERTICAL);
}
static void
render_horizontal_func (GdkDrawable *drawable,
GdkGC *gc,
int width, int height)
{
render_simple (drawable, gc, width, height, META_GRADIENT_HORIZONTAL);
}
static void
render_diagonal_func (GdkDrawable *drawable,
GdkGC *gc,
int width, int height)
{
render_simple (drawable, gc, width, height, META_GRADIENT_DIAGONAL);
}
static gboolean
expose_callback (GtkWidget *widget,
GdkEventExpose *event,
gpointer data)
{
RenderGradientFunc func = data;
(* func) (widget->window,
widget->style->fg_gc[widget->state],
widget->allocation.width,
widget->allocation.height);
return TRUE;
}
static GtkWidget*
create_gradient_window (RenderGradientFunc func)
{
GtkWidget *window;
GtkWidget *drawing_area;
window = gtk_window_new (GTK_WINDOW_POPUP);
drawing_area = gtk_drawing_area_new ();
gtk_widget_set_size_request (drawing_area, 175, 175);
g_signal_connect (G_OBJECT (drawing_area),
"expose_event",
G_CALLBACK (expose_callback),
func);
gtk_container_add (GTK_CONTAINER (window), drawing_area);
return window;
}
void
meta_gradient_test (void)
{
GtkWidget *window;
window = create_gradient_window (render_vertical_func);
gtk_window_move (GTK_WINDOW (window), 0, 0);
gtk_widget_show_all (window);
window = create_gradient_window (render_horizontal_func);
gtk_window_move (GTK_WINDOW (window), 0, 200);
gtk_widget_show_all (window);
window = create_gradient_window (render_diagonal_func);
gtk_window_move (GTK_WINDOW (window), 200, 0);
gtk_widget_show_all (window);
}
#endif

53
src/gradient.h Normal file
View File

@ -0,0 +1,53 @@
/* Metacity gradient rendering */
/*
* Copyright (C) 2001 Havoc Pennington, 99% copied from wrlib in
* WindowMaker, Copyright (C) 1997-2000 Dan Pascu and Alfredo Kojima
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or (at your option) any later version.
*
* This program 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
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
* 02111-1307, USA. */
#ifndef META_GRADIENT_H
#define META_GRADIENT_H
#include <gdk-pixbuf/gdk-pixbuf.h>
#include <gdk/gdkcolor.h>
typedef enum
{
META_GRADIENT_VERTICAL,
META_GRADIENT_HORIZONTAL,
META_GRADIENT_DIAGONAL
} MetaGradientType;
GdkPixbuf* meta_gradient_create_simple (int width,
int height,
const GdkColor *from,
const GdkColor *to,
MetaGradientType style);
GdkPixbuf* meta_gradient_create_multi (int width,
int height,
const GdkColor *colors,
int n_colors,
MetaGradientType style);
GdkPixbuf* meta_gradient_create_interwoven (int width,
int height,
const GdkColor colors1[2],
int thickness1,
const GdkColor colors2[2],
int thickness2);
#endif

246
src/testgradient.c Normal file
View File

@ -0,0 +1,246 @@
/* Metacity gradient test program */
/*
* Copyright (C) 2002 Havoc Pennington
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or (at your option) any later version.
*
* This program 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
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
* 02111-1307, USA. */
#include "gradient.h"
#include <gtk/gtk.h>
typedef void (* RenderGradientFunc) (GdkDrawable *drawable,
GdkGC *gc,
int width,
int height);
static void
render_simple (GdkDrawable *drawable,
GdkGC *gc,
int width, int height,
MetaGradientType type)
{
GdkPixbuf *pixbuf;
GdkColor from, to;
gdk_color_parse ("blue", &from);
gdk_color_parse ("green", &to);
pixbuf = meta_gradient_create_simple (width, height,
&from, &to,
type);
gdk_pixbuf_render_to_drawable (pixbuf,
drawable,
gc,
0, 0,
0, 0, width, height,
GDK_RGB_DITHER_NORMAL,
0, 0);
g_object_unref (G_OBJECT (pixbuf));
}
static void
render_vertical_func (GdkDrawable *drawable,
GdkGC *gc,
int width, int height)
{
render_simple (drawable, gc, width, height, META_GRADIENT_VERTICAL);
}
static void
render_horizontal_func (GdkDrawable *drawable,
GdkGC *gc,
int width, int height)
{
render_simple (drawable, gc, width, height, META_GRADIENT_HORIZONTAL);
}
static void
render_diagonal_func (GdkDrawable *drawable,
GdkGC *gc,
int width, int height)
{
render_simple (drawable, gc, width, height, META_GRADIENT_DIAGONAL);
}
static void
render_multi (GdkDrawable *drawable,
GdkGC *gc,
int width, int height,
MetaGradientType type)
{
GdkPixbuf *pixbuf;
#define N_COLORS 5
GdkColor colors[N_COLORS];
gdk_color_parse ("red", &colors[0]);
gdk_color_parse ("blue", &colors[1]);
gdk_color_parse ("orange", &colors[2]);
gdk_color_parse ("pink", &colors[3]);
gdk_color_parse ("green", &colors[4]);
pixbuf = meta_gradient_create_multi (width, height,
colors, N_COLORS,
type);
gdk_pixbuf_render_to_drawable (pixbuf,
drawable,
gc,
0, 0,
0, 0, width, height,
GDK_RGB_DITHER_NORMAL,
0, 0);
g_object_unref (G_OBJECT (pixbuf));
}
static void
render_vertical_multi_func (GdkDrawable *drawable,
GdkGC *gc,
int width, int height)
{
render_multi (drawable, gc, width, height, META_GRADIENT_VERTICAL);
}
static void
render_horizontal_multi_func (GdkDrawable *drawable,
GdkGC *gc,
int width, int height)
{
render_multi (drawable, gc, width, height, META_GRADIENT_HORIZONTAL);
}
static void
render_diagonal_multi_func (GdkDrawable *drawable,
GdkGC *gc,
int width, int height)
{
render_multi (drawable, gc, width, height, META_GRADIENT_DIAGONAL);
}
static void
render_interwoven_func (GdkDrawable *drawable,
GdkGC *gc,
int width, int height)
{
GdkPixbuf *pixbuf;
#define N_COLORS 4
GdkColor colors[N_COLORS];
gdk_color_parse ("red", &colors[0]);
gdk_color_parse ("blue", &colors[1]);
gdk_color_parse ("pink", &colors[2]);
gdk_color_parse ("green", &colors[3]);
pixbuf = meta_gradient_create_interwoven (width, height,
colors, height / 10,
colors + 2, height / 14);
gdk_pixbuf_render_to_drawable (pixbuf,
drawable,
gc,
0, 0,
0, 0, width, height,
GDK_RGB_DITHER_NORMAL,
0, 0);
g_object_unref (G_OBJECT (pixbuf));
}
static gboolean
expose_callback (GtkWidget *widget,
GdkEventExpose *event,
gpointer data)
{
RenderGradientFunc func = data;
(* func) (widget->window,
widget->style->fg_gc[widget->state],
widget->allocation.width,
widget->allocation.height);
return TRUE;
}
static GtkWidget*
create_gradient_window (const char *title,
RenderGradientFunc func)
{
GtkWidget *window;
GtkWidget *drawing_area;
window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
gtk_window_set_title (GTK_WINDOW (window), title);
drawing_area = gtk_drawing_area_new ();
gtk_widget_set_size_request (drawing_area, 1, 1);
gtk_window_set_default_size (GTK_WINDOW (window), 175, 175);
g_signal_connect (G_OBJECT (drawing_area),
"expose_event",
G_CALLBACK (expose_callback),
func);
gtk_container_add (GTK_CONTAINER (window), drawing_area);
gtk_widget_show_all (window);
return window;
}
static void
meta_gradient_test (void)
{
GtkWidget *window;
window = create_gradient_window ("Simple vertical",
render_vertical_func);
window = create_gradient_window ("Simple horizontal",
render_horizontal_func);
window = create_gradient_window ("Simple diagonal",
render_diagonal_func);
window = create_gradient_window ("Multi vertical",
render_vertical_multi_func);
window = create_gradient_window ("Multi horizontal",
render_horizontal_multi_func);
window = create_gradient_window ("Multi diagonal",
render_diagonal_multi_func);
window = create_gradient_window ("Interwoven",
render_interwoven_func);
}
int
main (int argc, char **argv)
{
gtk_init (&argc, &argv);
meta_gradient_test ();
gtk_main ();
return 0;
}

58
src/theme.c
View File

@ -21,8 +21,10 @@
#include "theme.h"
#include "util.h"
#include "gradient.h"
#include <string.h>
#if 0
/* fill_gradient routine from GNOME background-properties, CVS says
* Michael Fulbright checked it in, Copyright 1998 Red Hat Inc.
*/
@ -101,6 +103,7 @@ fill_gradient (GdkPixbuf *pixbuf,
g_free (row);
}
#endif
typedef struct _CachedGradient CachedGradient;
@ -236,8 +239,8 @@ meta_theme_get_gradient (MetaGradientType type,
"Requesting %s gradient one %d/%d/%d two %d/%d/%d "
"%d x %d\n",
type == META_GRADIENT_VERTICAL ? "vertical" : "horizontal",
color_one->red / 255, color_one->green / 255, color_one->blue / 255,
color_two->red / 255, color_two->green / 255, color_two->blue / 255,
color_one->red / 256, color_one->green / 256, color_one->blue / 256,
color_two->red / 256, color_two->green / 256, color_two->blue / 256,
width, height);
if (gradient_cache == NULL)
@ -266,6 +269,7 @@ meta_theme_get_gradient (MetaGradientType type,
return cached->pixbuf;
}
#if 0
gradient.pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, FALSE, 8,
gradient.width, gradient.height);
@ -276,24 +280,50 @@ meta_theme_get_gradient (MetaGradientType type,
gradient.width,
gradient.height,
0, 0);
#else
gradient.pixbuf = meta_gradient_create_simple (gradient.width,
gradient.height,
&gradient.color_one,
&gradient.color_two,
type);
cached = g_new (CachedGradient, 1);
*cached = gradient;
if (gradient.pixbuf == NULL)
{
meta_topic (META_DEBUG_GRADIENT_CACHE,
"Not enough memory to create gradient of size %d bytes\n",
GRADIENT_SIZE (&gradient));
return NULL;
}
#endif
g_hash_table_insert (gradient_cache, cached, cached);
if (GRADIENT_SIZE (&gradient) > MAX_CACHE_SIZE)
{
cached = g_new (CachedGradient, 1);
*cached = gradient;
meta_topic (META_DEBUG_GRADIENT_CACHE,
"Caching newly-created gradient, size is %d bytes, total cache size %d bytes %d gradients, maximum %d bytes\n",
GRADIENT_SIZE (cached),
cache_size, g_hash_table_size (gradient_cache), MAX_CACHE_SIZE);
g_hash_table_insert (gradient_cache, cached, cached);
cache_size += GRADIENT_SIZE (cached);
meta_topic (META_DEBUG_GRADIENT_CACHE,
"Caching newly-created gradient, size is %d bytes, total cache size %d bytes %d gradients, maximum %d bytes\n",
GRADIENT_SIZE (cached),
cache_size, g_hash_table_size (gradient_cache), MAX_CACHE_SIZE);
g_object_ref (G_OBJECT (cached->pixbuf)); /* to return to caller */
retval = cached->pixbuf;
cache_size += GRADIENT_SIZE (cached);
if (cache_size > MAX_CACHE_SIZE)
expire_some_old_gradients (); /* may unref "cached->pixbuf" and free "cached" */
g_object_ref (G_OBJECT (cached->pixbuf)); /* to return to caller */
retval = cached->pixbuf;
if (cache_size > MAX_CACHE_SIZE)
expire_some_old_gradients (); /* may unref "cached->pixbuf" and free "cached" */
}
else
{
meta_topic (META_DEBUG_GRADIENT_CACHE,
"Gradient of size %d bytes is too large to cache\n",
GRADIENT_SIZE (&gradient));
retval = gradient.pixbuf;
}
return retval;
}

6
src/theme.h
View File

@ -23,16 +23,12 @@
#define META_THEME_H
#include "frames.h"
#include "gradient.h"
/* theme.[hc] is basically responsible for drawing parts of the UI using
* theme data
*/
typedef enum
{
META_GRADIENT_VERTICAL,
META_GRADIENT_HORIZONTAL
} MetaGradientType;
GdkPixbuf* meta_theme_get_gradient (MetaGradientType type,
const GdkColor *color_one,