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added antialiasing 

2001-01-11  Sven Neumann  <sven@gimp.org>

	* libgimp/gimpcolorarea.c: added antialiasing
This commit is contained in:
Sven Neumann 2001-01-11 15:54:42 +00:00 committed by Sven Neumann
parent 09e5207a33
commit 4de527aba0
3 changed files with 98 additions and 26 deletions
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4
ChangeLog
View File

@ -1,3 +1,7 @@
2001-01-11 Sven Neumann <sven@gimp.org>
* libgimp/gimpcolorarea.c: added antialiasing
2001-01-11 Sven Neumann <sven@gimp.org>
* libgimp/gimpcolorbutton.[ch]: allow width/height of the color_area

60
libgimp/gimpcolorarea.c
View File

@ -264,6 +264,7 @@ gimp_color_area_has_alpha (GimpColorArea *gca)
static void
gimp_color_area_update (GimpColorArea *gca)
{
gint window_width, window_height;
guint x, y;
guint width, height;
guchar light[3];
@ -271,6 +272,7 @@ gimp_color_area_update (GimpColorArea *gca)
guchar opaque[3];
guchar *p;
guchar *buf;
gdouble frac;
g_return_if_fail (gca != NULL);
g_return_if_fail (GIMP_IS_COLOR_AREA (gca));
@ -278,18 +280,22 @@ gimp_color_area_update (GimpColorArea *gca)
if (! GTK_WIDGET_REALIZED (GTK_WIDGET (gca)))
return;
gdk_window_get_size (GTK_WIDGET (gca)->window, &width, &height);
gdk_window_get_size (GTK_WIDGET (gca)->window,
&window_width, &window_height);
if (!width || !height)
if (window_width < 1 || window_height < 1)
return;
width = window_width;
height = window_height;
p = buf = g_new (guchar, width * 3);
opaque[0] = gca->color.r * 255.999;
opaque[1] = gca->color.g * 255.999;
opaque[2] = gca->color.b * 255.999;
if (gca->alpha)
if (gca->alpha && gca->color.a < 1.0)
{
light[0] = (GIMP_CHECK_LIGHT +
(gca->color.r - GIMP_CHECK_LIGHT) * gca->color.a) * 255.999;
@ -310,27 +316,55 @@ gimp_color_area_update (GimpColorArea *gca)
for (x = 0; x < width; x++)
{
if (x <= y)
if (x * height < y * width)
{
*p++ = opaque[0];
*p++ = opaque[1];
*p++ = opaque[2];
continue;
}
else if (((x / GIMP_CHECK_SIZE_SM) ^ (y / GIMP_CHECK_SIZE_SM))
& 1)
frac = (gdouble) (x * height) / (gdouble) width - y;
if (((x / GIMP_CHECK_SIZE_SM) ^ (y / GIMP_CHECK_SIZE_SM)) & 1)
{
*p++ = light[0];
*p++ = light[1];
*p++ = light[2];
if ((gint) frac)
{
*p++ = light[0];
*p++ = light[1];
*p++ = light[2];
}
else
{
*p++ = (gdouble) light[0] * frac +
(gdouble) opaque[0] * (1.0 - frac);
*p++ = (gdouble) light[1] * frac +
(gdouble) opaque[1] * (1.0 - frac);
*p++ = (gdouble) light[2] * frac +
(gdouble) opaque[2] * (1.0 - frac);
}
}
else
{
*p++ = dark[0];
*p++ = dark[1];
*p++ = dark[2];
if ((gint) frac)
{
*p++ = dark[0];
*p++ = dark[1];
*p++ = dark[2];
}
else
{
*p++ = (gdouble) dark[0] * frac +
(gdouble) opaque[0] * (1.0 - frac);
*p++ = (gdouble) dark[1] * frac +
(gdouble) opaque[1] * (1.0 - frac);
*p++ = (gdouble) dark[2] * frac +
(gdouble) opaque[2] * (1.0 - frac);
}
}
}
gtk_preview_draw_row (GTK_PREVIEW (gca), buf,
0, height - y - 1, width);
}

60
libgimpwidgets/gimpcolorarea.c
View File

@ -264,6 +264,7 @@ gimp_color_area_has_alpha (GimpColorArea *gca)
static void
gimp_color_area_update (GimpColorArea *gca)
{
gint window_width, window_height;
guint x, y;
guint width, height;
guchar light[3];
@ -271,6 +272,7 @@ gimp_color_area_update (GimpColorArea *gca)
guchar opaque[3];
guchar *p;
guchar *buf;
gdouble frac;
g_return_if_fail (gca != NULL);
g_return_if_fail (GIMP_IS_COLOR_AREA (gca));
@ -278,18 +280,22 @@ gimp_color_area_update (GimpColorArea *gca)
if (! GTK_WIDGET_REALIZED (GTK_WIDGET (gca)))
return;
gdk_window_get_size (GTK_WIDGET (gca)->window, &width, &height);
gdk_window_get_size (GTK_WIDGET (gca)->window,
&window_width, &window_height);
if (!width || !height)
if (window_width < 1 || window_height < 1)
return;
width = window_width;
height = window_height;
p = buf = g_new (guchar, width * 3);
opaque[0] = gca->color.r * 255.999;
opaque[1] = gca->color.g * 255.999;
opaque[2] = gca->color.b * 255.999;
if (gca->alpha)
if (gca->alpha && gca->color.a < 1.0)
{
light[0] = (GIMP_CHECK_LIGHT +
(gca->color.r - GIMP_CHECK_LIGHT) * gca->color.a) * 255.999;
@ -310,27 +316,55 @@ gimp_color_area_update (GimpColorArea *gca)
for (x = 0; x < width; x++)
{
if (x <= y)
if (x * height < y * width)
{
*p++ = opaque[0];
*p++ = opaque[1];
*p++ = opaque[2];
continue;
}
else if (((x / GIMP_CHECK_SIZE_SM) ^ (y / GIMP_CHECK_SIZE_SM))
& 1)
frac = (gdouble) (x * height) / (gdouble) width - y;
if (((x / GIMP_CHECK_SIZE_SM) ^ (y / GIMP_CHECK_SIZE_SM)) & 1)
{
*p++ = light[0];
*p++ = light[1];
*p++ = light[2];
if ((gint) frac)
{
*p++ = light[0];
*p++ = light[1];
*p++ = light[2];
}
else
{
*p++ = (gdouble) light[0] * frac +
(gdouble) opaque[0] * (1.0 - frac);
*p++ = (gdouble) light[1] * frac +
(gdouble) opaque[1] * (1.0 - frac);
*p++ = (gdouble) light[2] * frac +
(gdouble) opaque[2] * (1.0 - frac);
}
}
else
{
*p++ = dark[0];
*p++ = dark[1];
*p++ = dark[2];
if ((gint) frac)
{
*p++ = dark[0];
*p++ = dark[1];
*p++ = dark[2];
}
else
{
*p++ = (gdouble) dark[0] * frac +
(gdouble) opaque[0] * (1.0 - frac);
*p++ = (gdouble) dark[1] * frac +
(gdouble) opaque[1] * (1.0 - frac);
*p++ = (gdouble) dark[2] * frac +
(gdouble) opaque[2] * (1.0 - frac);
}
}
}
gtk_preview_draw_row (GTK_PREVIEW (gca), buf,
0, height - y - 1, width);
}