nilix/openbox
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions
openbox/render/gradient.c

726 lines
22 KiB
C
Raw Blame History

/* -*- indent-tabs-mode: nil; tab-width: 4; c-basic-offset: 4; -*-
gradient.c for the Openbox window manager
Copyright (c) 2006 Mikael Magnusson
Copyright (c) 2003-2008 Dana Jansens
Copyright (c) 2003 Derek Foreman
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.
See the COPYING file for a copy of the GNU General Public License.
*/
#include "render.h"
#include "gradient.h"
#include "color.h"
#include <glib.h>
#include <string.h>
static void highlight(RrSurface *s, RrPixel32 *x, RrPixel32 *y,
gboolean raised);
static void gradient_parentrelative(RrAppearance *a, gint w, gint h);
static void gradient_solid(RrAppearance *l, gint w, gint h);
static void gradient_splitvertical(RrAppearance *a, gint w, gint h);
static void gradient_vertical(RrSurface *sf, gint w, gint h);
static void gradient_horizontal(RrSurface *sf, gint w, gint h);
static void gradient_mirrorhorizontal(RrSurface *sf, gint w, gint h);
static void gradient_diagonal(RrSurface *sf, gint w, gint h);
static void gradient_crossdiagonal(RrSurface *sf, gint w, gint h);
static void gradient_pyramid(RrSurface *sf, gint inw, gint inh);
void RrRender(RrAppearance *a, gint w, gint h)
{
RrPixel32 *data = a->surface.pixel_data;
RrPixel32 current;
guint r,g,b;
gint off, x;
switch (a->surface.grad) {
case RR_SURFACE_PARENTREL:
gradient_parentrelative(a, w, h);
break;
case RR_SURFACE_SOLID:
gradient_solid(a, w, h);
break;
case RR_SURFACE_SPLIT_VERTICAL:
gradient_splitvertical(a, w, h);
break;
case RR_SURFACE_VERTICAL:
gradient_vertical(&a->surface, w, h);
break;
case RR_SURFACE_HORIZONTAL:
gradient_horizontal(&a->surface, w, h);
break;
case RR_SURFACE_MIRROR_HORIZONTAL:
gradient_mirrorhorizontal(&a->surface, w, h);
break;
case RR_SURFACE_DIAGONAL:
gradient_diagonal(&a->surface, w, h);
break;
case RR_SURFACE_CROSS_DIAGONAL:
gradient_crossdiagonal(&a->surface, w, h);
break;
case RR_SURFACE_PYRAMID:
gradient_pyramid(&a->surface, w, h);
break;
default:
g_assert_not_reached(); /* unhandled gradient */
return;
}
if (a->surface.interlaced) {
gint i;
RrPixel32 *p;
r = a->surface.interlace_color->r;
g = a->surface.interlace_color->g;
b = a->surface.interlace_color->b;
current = (r << RrDefaultRedOffset)
+ (g << RrDefaultGreenOffset)
+ (b << RrDefaultBlueOffset);
p = data;
for (i = 0; i < h; i += 2, p += w)
for (x = 0; x < w; ++x, ++p)
*p = current;
}
if (a->surface.relief == RR_RELIEF_FLAT && a->surface.border) {
r = a->surface.border_color->r;
g = a->surface.border_color->g;
b = a->surface.border_color->b;
current = (r << RrDefaultRedOffset)
+ (g << RrDefaultGreenOffset)
+ (b << RrDefaultBlueOffset);
for (off = 0, x = 0; x < w; ++x, off++) {
*(data + off) = current;
*(data + off + ((h-1) * w)) = current;
}
for (off = 0, x = 0; x < h; ++x, off++) {
*(data + (off * w)) = current;
*(data + (off * w) + w - 1) = current;
}
}
if (a->surface.relief != RR_RELIEF_FLAT) {
if (a->surface.bevel == RR_BEVEL_1) {
for (off = 1, x = 1; x < w - 1; ++x, off++)
highlight(&a->surface, data + off,
data + off + (h-1) * w,
a->surface.relief==RR_RELIEF_RAISED);
for (off = 0, x = 0; x < h; ++x, off++)
highlight(&a->surface, data + off * w,
data + off * w + w - 1,
a->surface.relief==RR_RELIEF_RAISED);
}
if (a->surface.bevel == RR_BEVEL_2) {
for (off = 2, x = 2; x < w - 2; ++x, off++)
highlight(&a->surface, data + off + w,
data + off + (h-2) * w,
a->surface.relief==RR_RELIEF_RAISED);
for (off = 1, x = 1; x < h-1; ++x, off++)
highlight(&a->surface, data + off * w + 1,
data + off * w + w - 2,
a->surface.relief==RR_RELIEF_RAISED);
}
}
}
static void highlight(RrSurface *s, RrPixel32 *x, RrPixel32 *y, gboolean raised)
{
gint r, g, b;
RrPixel32 *up, *down;
if (raised) {
up = x;
down = y;
} else {
up = y;
down = x;
}
r = (*up >> RrDefaultRedOffset) & 0xFF;
r += (r * s->bevel_light_adjust) >> 8;
g = (*up >> RrDefaultGreenOffset) & 0xFF;
g += (g * s->bevel_light_adjust) >> 8;
b = (*up >> RrDefaultBlueOffset) & 0xFF;
b += (b * s->bevel_light_adjust) >> 8;
if (r > 0xFF) r = 0xFF;
if (g > 0xFF) g = 0xFF;
if (b > 0xFF) b = 0xFF;
*up = (r << RrDefaultRedOffset) + (g << RrDefaultGreenOffset)
+ (b << RrDefaultBlueOffset);
r = (*down >> RrDefaultRedOffset) & 0xFF;
r -= (r * s->bevel_dark_adjust) >> 8;
g = (*down >> RrDefaultGreenOffset) & 0xFF;
g -= (g * s->bevel_dark_adjust) >> 8;
b = (*down >> RrDefaultBlueOffset) & 0xFF;
b -= (b * s->bevel_dark_adjust) >> 8;
*down = (r << RrDefaultRedOffset) + (g << RrDefaultGreenOffset)
+ (b << RrDefaultBlueOffset);
}
static void create_bevel_colors(RrAppearance *l)
{
gint r, g, b;
/* light color */
r = l->surface.primary->r;
r += (r * l->surface.bevel_light_adjust) >> 8;
g = l->surface.primary->g;
g += (g * l->surface.bevel_light_adjust) >> 8;
b = l->surface.primary->b;
b += (b * l->surface.bevel_light_adjust) >> 8;
if (r > 0xFF) r = 0xFF;
if (g > 0xFF) g = 0xFF;
if (b > 0xFF) b = 0xFF;
g_assert(!l->surface.bevel_light);
l->surface.bevel_light = RrColorNew(l->inst, r, g, b);
/* dark color */
r = l->surface.primary->r;
r -= (r * l->surface.bevel_dark_adjust) >> 8;
g = l->surface.primary->g;
g -= (g * l->surface.bevel_dark_adjust) >> 8;
b = l->surface.primary->b;
b -= (b * l->surface.bevel_dark_adjust) >> 8;
g_assert(!l->surface.bevel_dark);
l->surface.bevel_dark = RrColorNew(l->inst, r, g, b);
}
static void gradient_parentrelative(RrAppearance *a, gint w, gint h)
{
RrPixel32 *source, *dest;
gint sw, sh, partial_w, partial_h, i;
g_assert (a->surface.parent);
g_assert (a->surface.parent->w);
sw = a->surface.parent->w;
sh = a->surface.parent->h;
/* This is a little hack. When a texture is parentrelative, and the same
area as the parent, and has a bevel, it will draw its bevel on top
of the parent's, amplifying it. So instead, rerender the child with
the parent's settings, but the child's bevel and interlace */
if (a->surface.relief != RR_RELIEF_FLAT &&
(a->surface.parent->surface.relief != RR_RELIEF_FLAT ||
a->surface.parent->surface.border) &&
!a->surface.parentx && !a->surface.parenty &&
sw == w && sh == h)
{
RrSurface old = a->surface;
a->surface = a->surface.parent->surface;
/* turn these off for the parent */
a->surface.relief = RR_RELIEF_FLAT;
a->surface.border = FALSE;
a->surface.pixel_data = old.pixel_data;
RrRender(a, w, h);
a->surface = old;
} else {
source = (a->surface.parent->surface.pixel_data +
a->surface.parentx + sw * a->surface.parenty);
dest = a->surface.pixel_data;
if (a->surface.parentx + w > sw) {
partial_w = sw - a->surface.parentx;
} else partial_w = w;
if (a->surface.parenty + h > sh) {
partial_h = sh - a->surface.parenty;
} else partial_h = h;
for (i = 0; i < partial_h; i++, source += sw, dest += w) {
memcpy(dest, source, partial_w * sizeof(RrPixel32));
}
}
}
static void gradient_solid(RrAppearance *l, gint w, gint h)
{
gint i;
RrPixel32 pix;
RrPixel32 *data = l->surface.pixel_data;
RrSurface *sp = &l->surface;
gint left = 0, top = 0, right = w - 1, bottom = h - 1;
pix = (sp->primary->r << RrDefaultRedOffset)
+ (sp->primary->g << RrDefaultGreenOffset)
+ (sp->primary->b << RrDefaultBlueOffset);
for (i = 0; i < w * h; i++)
*data++ = pix;
if (sp->interlaced)
return;
XFillRectangle(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->primary),
0, 0, w, h);
switch (sp->relief) {
case RR_RELIEF_RAISED:
if (!sp->bevel_dark)
create_bevel_colors(l);
switch (sp->bevel) {
case RR_BEVEL_1:
XDrawLine(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->bevel_dark),
left, bottom, right, bottom);
XDrawLine(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->bevel_dark),
right, bottom, right, top);
XDrawLine(RrDisplay(l->inst), l->pixmap,RrColorGC(sp->bevel_light),
left, top, right, top);
XDrawLine(RrDisplay(l->inst), l->pixmap,RrColorGC(sp->bevel_light),
left, bottom, left, top);
break;
case RR_BEVEL_2:
XDrawLine(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->bevel_dark),
left + 2, bottom - 1, right - 2, bottom - 1);
XDrawLine(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->bevel_dark),
right - 1, bottom - 1, right - 1, top + 1);
XDrawLine(RrDisplay(l->inst), l->pixmap,RrColorGC(sp->bevel_light),
left + 2, top + 1, right - 2, top + 1);
XDrawLine(RrDisplay(l->inst), l->pixmap,RrColorGC(sp->bevel_light),
left + 1, bottom - 1, left + 1, top + 1);
break;
default:
g_assert_not_reached(); /* unhandled BevelType */
}
break;
case RR_RELIEF_SUNKEN:
if (!sp->bevel_dark)
create_bevel_colors(l);
switch (sp->bevel) {
case RR_BEVEL_1:
XDrawLine(RrDisplay(l->inst), l->pixmap,RrColorGC(sp->bevel_light),
left, bottom, right, bottom);
XDrawLine(RrDisplay(l->inst), l->pixmap,RrColorGC(sp->bevel_light),
right, bottom, right, top);
XDrawLine(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->bevel_dark),
left, top, right, top);
XDrawLine(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->bevel_dark),
left, bottom, left, top);
break;
case RR_BEVEL_2:
XDrawLine(RrDisplay(l->inst), l->pixmap,RrColorGC(sp->bevel_light),
left + 2, bottom - 1, right - 2, bottom - 1);
XDrawLine(RrDisplay(l->inst), l->pixmap,RrColorGC(sp->bevel_light),
right - 1, bottom - 1, right - 1, top + 1);
XDrawLine(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->bevel_dark),
left + 2, top + 1, right - 2, top + 1);
XDrawLine(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->bevel_dark),
left + 1, bottom - 1, left + 1, top + 1);
break;
default:
g_assert_not_reached(); /* unhandled BevelType */
}
break;
case RR_RELIEF_FLAT:
if (sp->border) {
XDrawRectangle(RrDisplay(l->inst), l->pixmap,
RrColorGC(sp->border_color),
left, top, right, bottom);
}
break;
default:
g_assert_not_reached(); /* unhandled ReliefType */
}
}
/* * * * * * * * * * * * * * GRADIENT MAGIC WOOT * * * * * * * * * * * * * * */
#define VARS(x) \
guint color##x[3]; \
gint len##x, cdelta##x[3], error##x[3] = { 0, 0, 0 }, inc##x[3]; \
gboolean bigslope##x[3] /* color slope > 1 */
#define SETUP(x, from, to, w) \
len##x = w; \
\
color##x[0] = from->r; \
color##x[1] = from->g; \
color##x[2] = from->b; \
\
cdelta##x[0] = to->r - from->r; \
cdelta##x[1] = to->g - from->g; \
cdelta##x[2] = to->b - from->b; \
\
if (cdelta##x[0] < 0) { \
cdelta##x[0] = -cdelta##x[0]; \
inc##x[0] = -1; \
} else \
inc##x[0] = 1; \
if (cdelta##x[1] < 0) { \
cdelta##x[1] = -cdelta##x[1]; \
inc##x[1] = -1; \
} else \
inc##x[1] = 1; \
if (cdelta##x[2] < 0) { \
cdelta##x[2] = -cdelta##x[2]; \
inc##x[2] = -1; \
} else \
inc##x[2] = 1; \
bigslope##x[0] = cdelta##x[0] > w;\
bigslope##x[1] = cdelta##x[1] > w;\
bigslope##x[2] = cdelta##x[2] > w
#define COLOR_RR(x, c) \
c->r = color##x[0]; \
c->g = color##x[1]; \
c->b = color##x[2]
#define COLOR(x) \
((color##x[0] << RrDefaultRedOffset) + \
(color##x[1] << RrDefaultGreenOffset) + \
(color##x[2] << RrDefaultBlueOffset))
#define INCREMENT(x, i) \
(inc##x[i])
#define NEXT(x) \
{ \
gint i; \
for (i = 2; i >= 0; --i) { \
if (!cdelta##x[i]) continue; \
\
if (!bigslope##x[i]) { \
/* Y (color) is dependant on X */ \
error##x[i] += cdelta##x[i]; \
if ((error##x[i] << 1) >= len##x) { \
color##x[i] += INCREMENT(x, i); \
error##x[i] -= len##x; \
} \
} else { \
/* X is dependant on Y (color) */ \
while (1) { \
color##x[i] += INCREMENT(x, i); \
error##x[i] += len##x; \
if ((error##x[i] << 1) >= cdelta##x[i]) { \
error##x[i] -= cdelta##x[i]; \
break; \
} \
} \
} \
} \
}
static void gradient_splitvertical(RrAppearance *a, gint w, gint h)
{
gint x, y1, y2, y3;
RrSurface *sf = &a->surface;
RrPixel32 *data = sf->pixel_data;
RrPixel32 current;
gint y1sz, y2sz, y3sz;
VARS(y1);
VARS(y2);
VARS(y3);
/* if h <= 5, then a 0 or 1px middle gradient.
if h > 5, then always a 1px middle gradient.
*/
if (h <= 5) {
y1sz = MAX(h/2, 0);
y2sz = (h < 3 ? 0 : h % 2);
y3sz = MAX(h/2, 1);
}
else {
y1sz = h/2 - (1 - (h % 2));
y2sz = 1;
y3sz = h/2;
}
SETUP(y1, sf->split_primary, sf->primary, y1sz);
if (y2sz) {
/* setup to get the colors _in between_ these other 2 */
SETUP(y2, sf->primary, sf->secondary, y2sz + 2);
NEXT(y2); /* skip the first one, its the same as the last of y1 */
}
SETUP(y3, sf->secondary, sf->split_secondary, y3sz);
for (y1 = y1sz; y1 > 0; --y1) {
current = COLOR(y1);
for (x = w - 1; x >= 0; --x)
*(data++) = current;
NEXT(y1);
}
for (y2 = y2sz; y2 > 0; --y2) {
current = COLOR(y2);
for (x = w - 1; x >= 0; --x)
*(data++) = current;
NEXT(y2);
}
for (y3 = y3sz; y3 > 0; --y3) {
current = COLOR(y3);
for (x = w - 1; x >= 0; --x)
*(data++) = current;
NEXT(y3);
}
}
static void gradient_horizontal(RrSurface *sf, gint w, gint h)
{
gint x, y;
RrPixel32 *data = sf->pixel_data, *datav;
VARS(x);
SETUP(x, sf->primary, sf->secondary, w);
datav = data;
for (x = w - 1; x > 0; --x) { /* 0 -> w - 1 */
*datav = COLOR(x);
++datav;
NEXT(x);
}
*datav = COLOR(x);
++datav;
for (y = h - 1; y > 0; --y) { /* 1 -> h */
memcpy(datav, data, w * sizeof(RrPixel32));
datav += w;
}
}
static void gradient_mirrorhorizontal(RrSurface *sf, gint w, gint h)
{
gint x, y, half1, half2;
RrPixel32 *data = sf->pixel_data, *datav;
VARS(x);
half1 = (w + 1) / 2;
half2 = w / 2;
SETUP(x, sf->primary, sf->secondary, half1);
datav = data;
for (x = half1 - 1; x > 0; --x) { /* 0 -> half1 - 1 */
*datav = COLOR(x);
++datav;
NEXT(x);
}
*datav = COLOR(x);
++datav;
if (half2 > 0) {
SETUP(x, sf->secondary, sf->primary, half2);
for (x = half2 - 1; x > 0; --x) { /* 0 -> half2 - 1 */
*datav = COLOR(x);
++datav;
NEXT(x);
}
*datav = COLOR(x);
++datav;
}
for (y = h - 1; y > 0; --y) { /* 1 -> h */
memcpy(datav, data, w * sizeof(RrPixel32));
datav += w;
}
}
static void gradient_vertical(RrSurface *sf, gint w, gint h)
{
gint x, y;
RrPixel32 *data = sf->pixel_data;
RrPixel32 current;
VARS(y);
SETUP(y, sf->primary, sf->secondary, h);
for (y = h - 1; y > 0; --y) { /* 0 -> h-1 */
current = COLOR(y);
for (x = w - 1; x >= 0; --x) /* 0 -> w */
*(data++) = current;
NEXT(y);
}
current = COLOR(y);
for (x = w - 1; x >= 0; --x) /* 0 -> w */
*(data++) = current;
}
static void gradient_diagonal(RrSurface *sf, gint w, gint h)
{
gint x, y;
RrPixel32 *data = sf->pixel_data;
RrColor left, right;
RrColor extracorner;
VARS(lefty);
VARS(righty);
VARS(x);
extracorner.r = (sf->primary->r + sf->secondary->r) / 2;
extracorner.g = (sf->primary->g + sf->secondary->g) / 2;
extracorner.b = (sf->primary->b + sf->secondary->b) / 2;
SETUP(lefty, sf->primary, (&extracorner), h);
SETUP(righty, (&extracorner), sf->secondary, h);
for (y = h - 1; y > 0; --y) { /* 0 -> h-1 */
COLOR_RR(lefty, (&left));
COLOR_RR(righty, (&right));
SETUP(x, (&left), (&right), w);
for (x = w - 1; x > 0; --x) { /* 0 -> w-1 */
*(data++) = COLOR(x);
NEXT(x);
}
*(data++) = COLOR(x);
NEXT(lefty);
NEXT(righty);
}
COLOR_RR(lefty, (&left));
COLOR_RR(righty, (&right));
SETUP(x, (&left), (&right), w);
for (x = w - 1; x > 0; --x) { /* 0 -> w-1 */
*(data++) = COLOR(x);
NEXT(x);
}
*data = COLOR(x);
}
static void gradient_crossdiagonal(RrSurface *sf, gint w, gint h)
{
gint x, y;
RrPixel32 *data = sf->pixel_data;
RrColor left, right;
RrColor extracorner;
VARS(lefty);
VARS(righty);
VARS(x);
extracorner.r = (sf->primary->r + sf->secondary->r) / 2;
extracorner.g = (sf->primary->g + sf->secondary->g) / 2;
extracorner.b = (sf->primary->b + sf->secondary->b) / 2;
SETUP(lefty, (&extracorner), sf->secondary, h);
SETUP(righty, sf->primary, (&extracorner), h);
for (y = h - 1; y > 0; --y) { /* 0 -> h-1 */
COLOR_RR(lefty, (&left));
COLOR_RR(righty, (&right));
SETUP(x, (&left), (&right), w);
for (x = w - 1; x > 0; --x) { /* 0 -> w-1 */
*(data++) = COLOR(x);
NEXT(x);
}
*(data++) = COLOR(x);
NEXT(lefty);
NEXT(righty);
}
COLOR_RR(lefty, (&left));
COLOR_RR(righty, (&right));
SETUP(x, (&left), (&right), w);
for (x = w - 1; x > 0; --x) { /* 0 -> w-1 */
*(data++) = COLOR(x);
NEXT(x);
}
*data = COLOR(x);
}
static void gradient_pyramid(RrSurface *sf, gint inw, gint inh)
{
gint x, y, w = (inw >> 1) + 1, h = (inh >> 1) + 1;
RrPixel32 *data = sf->pixel_data;
RrPixel32 *end = data + inw*inh - 1;
RrPixel32 current;
RrColor left, right;
RrColor extracorner;
VARS(lefty);
VARS(righty);
VARS(x);
extracorner.r = (sf->primary->r + sf->secondary->r) / 2;
extracorner.g = (sf->primary->g + sf->secondary->g) / 2;
extracorner.b = (sf->primary->b + sf->secondary->b) / 2;
SETUP(lefty, (&extracorner), sf->secondary, h);
SETUP(righty, sf->primary, (&extracorner), h);
for (y = h - 1; y > 0; --y) { /* 0 -> h-1 */
COLOR_RR(lefty, (&left));
COLOR_RR(righty, (&right));
SETUP(x, (&left), (&right), w);
for (x = w - 1; x > 0; --x) { /* 0 -> w-1 */
current = COLOR(x);
*(data+x) = current;
*(data+inw-x) = current;
*(end-x) = current;
*(end-(inw-x)) = current;
NEXT(x);
}
current = COLOR(x);
*(data+x) = current;
*(data+inw-x) = current;
*(end-x) = current;
*(end-(inw-x)) = current;
data+=inw;
end-=inw;
NEXT(lefty);
NEXT(righty);
}
COLOR_RR(lefty, (&left));
COLOR_RR(righty, (&right));
SETUP(x, (&left), (&right), w);
for (x = w - 1; x > 0; --x) { /* 0 -> w-1 */
current = COLOR(x);
*(data+x) = current;
*(data+inw-x) = current;
*(end-x) = current;
*(end-(inw-x)) = current;
NEXT(x);
}
current = COLOR(x);
*(data+x) = current;
*(data+inw-x) = current;
*(end-x) = current;
*(end-(inw-x)) = current;
}
Reference in a new issue View git blame Copy permalink