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gradient: Port from GdkColor to GdkRGBA

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GdkColor is about to be deprecated, so move to GdkRGBA instead.
It might be worth considering using cairo patterns for the gradients
rather than using custom code to render gradients to a pixbuf which
is then drawn with cairo, but for now this is just a straight port
of the existing code.

https://bugzilla.gnome.org/show_bug.cgi?id=650586
This commit is contained in:
Florian Müllner 2011-05-12 16:47:45 +02:00
parent 48cabd1364
commit 8199699e7c
4 changed files with 104 additions and 97 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

10
src/meta/gradient.h
View file

@ -37,19 +37,19 @@ typedef enum
GdkPixbuf* meta_gradient_create_simple (int width,
int height,
const GdkColor *from,
const GdkColor *to,
const GdkRGBA *from,
const GdkRGBA *to,
MetaGradientType style);
GdkPixbuf* meta_gradient_create_multi (int width,
int height,
const GdkColor *colors,
const GdkRGBA *colors,
int n_colors,
MetaGradientType style);
GdkPixbuf* meta_gradient_create_interwoven (int width,
int height,
const GdkColor colors1[2],
const GdkRGBA colors1[2],
int thickness1,
const GdkColor colors2[2],
const GdkRGBA colors2[2],
int thickness2);

130
src/ui/gradient.c
View file

@ -31,27 +31,27 @@
*/
static GdkPixbuf* meta_gradient_create_horizontal (int width,
int height,
const GdkColor *from,
const GdkColor *to);
const GdkRGBA *from,
const GdkRGBA *to);
static GdkPixbuf* meta_gradient_create_vertical (int width,
int height,
const GdkColor *from,
const GdkColor *to);
const GdkRGBA *from,
const GdkRGBA *to);
static GdkPixbuf* meta_gradient_create_diagonal (int width,
int height,
const GdkColor *from,
const GdkColor *to);
const GdkRGBA *from,
const GdkRGBA *to);
static GdkPixbuf* meta_gradient_create_multi_horizontal (int width,
int height,
const GdkColor *colors,
const GdkRGBA *colors,
int count);
static GdkPixbuf* meta_gradient_create_multi_vertical (int width,
int height,
const GdkColor *colors,
const GdkRGBA *colors,
int count);
static GdkPixbuf* meta_gradient_create_multi_diagonal (int width,
int height,
const GdkColor *colors,
const GdkRGBA *colors,
int count);
@ -100,8 +100,8 @@ blank_pixbuf (int width, int height, gboolean no_padding)
GdkPixbuf*
meta_gradient_create_simple (int width,
int height,
const GdkColor *from,
const GdkColor *to,
const GdkRGBA *from,
const GdkRGBA *to,
MetaGradientType style)
{
switch (style)
@ -136,7 +136,7 @@ meta_gradient_create_simple (int width,
GdkPixbuf*
meta_gradient_create_multi (int width,
int height,
const GdkColor *colors,
const GdkRGBA *colors,
int n_colors,
MetaGradientType style)
{
@ -181,9 +181,9 @@ meta_gradient_create_multi (int width,
GdkPixbuf*
meta_gradient_create_interwoven (int width,
int height,
const GdkColor colors1[2],
const GdkRGBA colors1[2],
int thickness1,
const GdkColor colors2[2],
const GdkRGBA colors2[2],
int thickness2)
{
@ -202,21 +202,21 @@ meta_gradient_create_interwoven (int width,
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;
r1 = (long)(colors1[0].red*0xffffff);
g1 = (long)(colors1[0].green*0xffffff);
b1 = (long)(colors1[0].blue*0xffffff);
r2 = colors2[0].red<<8;
g2 = colors2[0].green<<8;
b2 = colors2[0].blue<<8;
r2 = (long)(colors2[0].red*0xffffff);
g2 = (long)(colors2[0].green*0xffffff);
b2 = (long)(colors2[0].blue*0xffffff);
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;
dr1 = ((colors1[1].red-colors1[0].red)*0xffffff)/(int)height;
dg1 = ((colors1[1].green-colors1[0].green)*0xffffff)/(int)height;
db1 = ((colors1[1].blue-colors1[0].blue)*0xffffff)/(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;
dr2 = ((colors2[1].red-colors2[0].red)*0xffffff)/(int)height;
dg2 = ((colors2[1].green-colors2[0].green)*0xffffff)/(int)height;
db2 = ((colors2[1].blue-colors2[0].blue)*0xffffff)/(int)height;
for (i=0,k=0,l=0,ll=thickness1; i<height; i++)
{
@ -280,8 +280,8 @@ meta_gradient_create_interwoven (int width,
*/
static GdkPixbuf*
meta_gradient_create_horizontal (int width, int height,
const GdkColor *from,
const GdkColor *to)
const GdkRGBA *from,
const GdkRGBA *to)
{
int i;
long r, g, b, dr, dg, db;
@ -300,12 +300,12 @@ meta_gradient_create_horizontal (int width, int height,
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);
r0 = (guchar) (from->red * 0xff);
g0 = (guchar) (from->green * 0xff);
b0 = (guchar) (from->blue * 0xff);
rf = (guchar) (to->red * 0xff);
gf = (guchar) (to->green * 0xff);
bf = (guchar) (to->blue * 0xff);
r = r0 << 16;
g = g0 << 16;
@ -348,8 +348,8 @@ meta_gradient_create_horizontal (int width, int height,
*/
static GdkPixbuf*
meta_gradient_create_vertical (int width, int height,
const GdkColor *from,
const GdkColor *to)
const GdkRGBA *from,
const GdkRGBA *to)
{
int i, j;
long r, g, b, dr, dg, db;
@ -367,12 +367,12 @@ meta_gradient_create_vertical (int width, int height,
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);
r0 = (guchar) (from->red * 0xff);
g0 = (guchar) (from->green * 0xff);
b0 = (guchar) (from->blue * 0xff);
rf = (guchar) (to->red * 0xff);
gf = (guchar) (to->green * 0xff);
bf = (guchar) (to->blue * 0xff);
r = r0<<16;
g = g0<<16;
@ -419,8 +419,8 @@ meta_gradient_create_vertical (int width, int height,
static GdkPixbuf*
meta_gradient_create_diagonal (int width, int height,
const GdkColor *from,
const GdkColor *to)
const GdkRGBA *from,
const GdkRGBA *to)
{
GdkPixbuf *pixbuf, *tmp;
int j;
@ -467,7 +467,7 @@ meta_gradient_create_diagonal (int width, int height,
static GdkPixbuf*
meta_gradient_create_multi_horizontal (int width, int height,
const GdkColor *colors,
const GdkRGBA *colors,
int count)
{
int i, j, k;
@ -498,16 +498,16 @@ meta_gradient_create_multi_horizontal (int width, int height,
k = 0;
r = colors[0].red << 8;
g = colors[0].green << 8;
b = colors[0].blue << 8;
r = (long)(colors[0].red * 0xffffff);
g = (long)(colors[0].green * 0xffffff);
b = (long)(colors[0].blue * 0xffffff);
/* 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;
dr = (int)((colors[i].red - colors[i-1].red) *0xffffff)/(int)width2;
dg = (int)((colors[i].green - colors[i-1].green)*0xffffff)/(int)width2;
db = (int)((colors[i].blue - colors[i-1].blue) *0xffffff)/(int)width2;
for (j=0; j<width2; j++)
{
*ptr++ = (unsigned char)(r>>16);
@ -518,9 +518,9 @@ meta_gradient_create_multi_horizontal (int width, int height,
b += db;
k++;
}
r = colors[i].red << 8;
g = colors[i].green << 8;
b = colors[i].blue << 8;
r = (long)(colors[i].red * 0xffffff);
g = (long)(colors[i].green * 0xffffff);
b = (long)(colors[i].blue * 0xffffff);
}
for (j=k; j<width; j++)
{
@ -539,7 +539,7 @@ meta_gradient_create_multi_horizontal (int width, int height,
static GdkPixbuf*
meta_gradient_create_multi_vertical (int width, int height,
const GdkColor *colors,
const GdkRGBA *colors,
int count)
{
int i, j, k;
@ -570,15 +570,15 @@ meta_gradient_create_multi_vertical (int width, int height,
k = 0;
r = colors[0].red << 8;
g = colors[0].green << 8;
b = colors[0].blue << 8;
r = (long)(colors[0].red * 0xffffff);
g = (long)(colors[0].green * 0xffffff);
b = (long)(colors[0].blue * 0xffffff);
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;
dr = (int)((colors[i].red - colors[i-1].red) *0xffffff)/(int)height2;
dg = (int)((colors[i].green - colors[i-1].green)*0xffffff)/(int)height2;
db = (int)((colors[i].blue - colors[i-1].blue) *0xffffff)/(int)height2;
for (j=0; j<height2; j++)
{
@ -597,9 +597,9 @@ meta_gradient_create_multi_vertical (int width, int height,
b += db;
k++;
}
r = colors[i].red << 8;
g = colors[i].green << 8;
b = colors[i].blue << 8;
r = (long)(colors[i].red * 0xffffff);
g = (long)(colors[i].green * 0xffffff);
b = (long)(colors[i].blue * 0xffffff);
}
if (k<height)
@ -629,7 +629,7 @@ meta_gradient_create_multi_vertical (int width, int height,
static GdkPixbuf*
meta_gradient_create_multi_diagonal (int width, int height,
const GdkColor *colors,
const GdkRGBA *colors,
int count)
{
GdkPixbuf *pixbuf, *tmp;

50
src/ui/testgradient.c
View file

@ -33,18 +33,20 @@ draw_checkerboard (cairo_t *cr,
int height)
{
gint i, j, xcount, ycount;
GdkColor color1, color2;
GdkRGBA color1, color2;
#define CHECK_SIZE 10
#define SPACING 2
color1.red = 30000;
color1.green = 30000;
color1.blue = 30000;
color1.red = 30000. / 65535.;
color1.green = 30000. / 65535.;
color1.blue = 30000. / 65535.;
color1.alpha = 1.0;
color2.red = 50000;
color2.green = 50000;
color2.blue = 50000;
color2.red = 50000. / 65535.;
color2.green = 50000. / 65535.;
color2.blue = 50000. / 65535.;
color2.alpha = 1.0;
xcount = 0;
i = SPACING;
@ -55,9 +57,9 @@ draw_checkerboard (cairo_t *cr,
while (j < height)
{
if (ycount % 2)
gdk_cairo_set_source_color (cr, &color1);
gdk_cairo_set_source_rgba (cr, &color1);
else
gdk_cairo_set_source_color (cr, &color2);
gdk_cairo_set_source_rgba (cr, &color2);
/* If we're outside event->area, this will do nothing.
* It might be mildly more efficient if we handled
@ -82,10 +84,10 @@ render_simple (cairo_t *cr,
gboolean with_alpha)
{
GdkPixbuf *pixbuf;
GdkColor from, to;
GdkRGBA from, to;
gdk_color_parse ("blue", &from);
gdk_color_parse ("green", &to);
gdk_rgba_parse (&from, "blue");
gdk_rgba_parse (&to, "green");
pixbuf = meta_gradient_create_simple (width, height,
&from, &to,
@ -153,13 +155,13 @@ render_multi (cairo_t *cr,
{
GdkPixbuf *pixbuf;
#define N_COLORS 5
GdkColor colors[N_COLORS];
GdkRGBA 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]);
gdk_rgba_parse (&colors[0], "red");
gdk_rgba_parse (&colors[1], "blue");
gdk_rgba_parse (&colors[2], "orange");
gdk_rgba_parse (&colors[3], "pink");
gdk_rgba_parse (&colors[4], "green");
pixbuf = meta_gradient_create_multi (width, height,
colors, N_COLORS,
@ -200,12 +202,12 @@ render_interwoven_func (cairo_t *cr,
{
GdkPixbuf *pixbuf;
#define N_COLORS 4
GdkColor colors[N_COLORS];
GdkRGBA 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]);
gdk_rgba_parse (&colors[0], "red");
gdk_rgba_parse (&colors[1], "blue");
gdk_rgba_parse (&colors[2], "pink");
gdk_rgba_parse (&colors[3], "green");
pixbuf = meta_gradient_create_interwoven (width, height,
colors, height / 10,
@ -234,7 +236,7 @@ draw_callback (GtkWidget *widget,
gtk_style_context_lookup_color (style, "foreground-color", &color);
gtk_style_context_restore (style);
cairo_set_source_rgba (cr, color.red, color.green, color.blue, color.alpha);
gdk_cairo_set_source_rgba (cr, &color);
(* func) (cr,
gtk_widget_get_allocated_width (widget),

11
src/ui/theme.c
View file

@ -1020,7 +1020,7 @@ meta_gradient_spec_render (const MetaGradientSpec *spec,
int height)
{
int n_colors;
GdkColor *colors;
GdkRGBA *colors;
GSList *tmp;
int i;
GdkPixbuf *pixbuf;
@ -1030,13 +1030,18 @@ meta_gradient_spec_render (const MetaGradientSpec *spec,
if (n_colors == 0)
return NULL;
colors = g_new (GdkColor, n_colors);
colors = g_new (GdkRGBA, n_colors);
i = 0;
tmp = spec->color_specs;
while (tmp != NULL)
{
meta_color_spec_render (tmp->data, style, &colors[i]);
GdkColor gdk_color;
meta_color_spec_render (tmp->data, style, &gdk_color);
colors[i].red = gdk_color.red / 65535.;
colors[i].green = gdk_color.green / 65535.;
colors[i].blue = gdk_color.blue / 65535.;
tmp = tmp->next;
++i;