674 lines
20 KiB
C
674 lines
20 KiB
C
/* -*- indent-tabs-mode: nil; tab-width: 4; c-basic-offset: 4; -*-
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gradient.c for the Openbox window manager
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Copyright (c) 2006 Mikael Magnusson
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Copyright (c) 2003 Ben Jansens
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Copyright (c) 2003 Derek Foreman
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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See the COPYING file for a copy of the GNU General Public License.
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*/
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#include "render.h"
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#include "gradient.h"
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#include "color.h"
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#include <glib.h>
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static void highlight(RrPixel32 *x, RrPixel32 *y, gboolean raised);
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static void gradient_solid(RrAppearance *l, gint w, gint h);
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static void gradient_splitvertical(RrAppearance *a, gint w, gint h);
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static void gradient_vertical(RrSurface *sf, gint w, gint h);
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static void gradient_horizontal(RrSurface *sf, gint w, gint h);
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static void gradient_mirrorhorizontal(RrSurface *sf, gint w, gint h);
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static void gradient_diagonal(RrSurface *sf, gint w, gint h);
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static void gradient_crossdiagonal(RrSurface *sf, gint w, gint h);
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static void gradient_pyramid(RrSurface *sf, gint inw, gint inh);
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void RrRender(RrAppearance *a, gint w, gint h)
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{
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RrPixel32 *data = a->surface.pixel_data;
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RrPixel32 current;
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guint r,g,b;
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gint off, x;
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switch (a->surface.grad) {
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case RR_SURFACE_SOLID:
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gradient_solid(a, w, h);
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break;
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case RR_SURFACE_SPLIT_VERTICAL:
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gradient_splitvertical(a, w, h);
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break;
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case RR_SURFACE_VERTICAL:
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gradient_vertical(&a->surface, w, h);
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break;
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case RR_SURFACE_HORIZONTAL:
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gradient_horizontal(&a->surface, w, h);
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break;
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case RR_SURFACE_MIRROR_HORIZONTAL:
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gradient_mirrorhorizontal(&a->surface, w, h);
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break;
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case RR_SURFACE_DIAGONAL:
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gradient_diagonal(&a->surface, w, h);
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break;
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case RR_SURFACE_CROSS_DIAGONAL:
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gradient_crossdiagonal(&a->surface, w, h);
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break;
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case RR_SURFACE_PYRAMID:
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gradient_pyramid(&a->surface, w, h);
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break;
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default:
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g_assert_not_reached(); /* unhandled gradient */
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return;
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}
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if (a->surface.interlaced) {
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gint i;
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RrPixel32 *p;
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r = a->surface.interlace_color->r;
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g = a->surface.interlace_color->g;
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b = a->surface.interlace_color->b;
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current = (r << RrDefaultRedOffset)
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+ (g << RrDefaultGreenOffset)
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+ (b << RrDefaultBlueOffset);
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p = data;
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for (i = 0; i < h; i += 2, p += w)
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for (x = 0; x < w; ++x, ++p)
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*p = current;
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}
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if (a->surface.relief == RR_RELIEF_FLAT && a->surface.border) {
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r = a->surface.border_color->r;
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g = a->surface.border_color->g;
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b = a->surface.border_color->b;
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current = (r << RrDefaultRedOffset)
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+ (g << RrDefaultGreenOffset)
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+ (b << RrDefaultBlueOffset);
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for (off = 0, x = 0; x < w; ++x, off++) {
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*(data + off) = current;
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*(data + off + ((h-1) * w)) = current;
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}
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for (off = 0, x = 0; x < h; ++x, off++) {
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*(data + (off * w)) = current;
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*(data + (off * w) + w - 1) = current;
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}
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}
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if (a->surface.relief != RR_RELIEF_FLAT) {
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if (a->surface.bevel == RR_BEVEL_1) {
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for (off = 1, x = 1; x < w - 1; ++x, off++)
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highlight(data + off,
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data + off + (h-1) * w,
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a->surface.relief==RR_RELIEF_RAISED);
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for (off = 0, x = 0; x < h; ++x, off++)
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highlight(data + off * w,
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data + off * w + w - 1,
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a->surface.relief==RR_RELIEF_RAISED);
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}
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if (a->surface.bevel == RR_BEVEL_2) {
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for (off = 2, x = 2; x < w - 2; ++x, off++)
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highlight(data + off + w,
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data + off + (h-2) * w,
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a->surface.relief==RR_RELIEF_RAISED);
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for (off = 1, x = 1; x < h-1; ++x, off++)
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highlight(data + off * w + 1,
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data + off * w + w - 2,
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a->surface.relief==RR_RELIEF_RAISED);
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}
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}
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}
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static void highlight(RrPixel32 *x, RrPixel32 *y, gboolean raised)
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{
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gint r, g, b;
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RrPixel32 *up, *down;
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if (raised) {
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up = x;
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down = y;
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} else {
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up = y;
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down = x;
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}
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r = (*up >> RrDefaultRedOffset) & 0xFF;
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r += r >> 1;
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g = (*up >> RrDefaultGreenOffset) & 0xFF;
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g += g >> 1;
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b = (*up >> RrDefaultBlueOffset) & 0xFF;
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b += b >> 1;
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if (r > 0xFF) r = 0xFF;
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if (g > 0xFF) g = 0xFF;
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if (b > 0xFF) b = 0xFF;
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*up = (r << RrDefaultRedOffset) + (g << RrDefaultGreenOffset)
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+ (b << RrDefaultBlueOffset);
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r = (*down >> RrDefaultRedOffset) & 0xFF;
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r = (r >> 1) + (r >> 2);
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g = (*down >> RrDefaultGreenOffset) & 0xFF;
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g = (g >> 1) + (g >> 2);
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b = (*down >> RrDefaultBlueOffset) & 0xFF;
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b = (b >> 1) + (b >> 2);
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*down = (r << RrDefaultRedOffset) + (g << RrDefaultGreenOffset)
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+ (b << RrDefaultBlueOffset);
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}
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static void create_bevel_colors(RrAppearance *l)
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{
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gint r, g, b;
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/* light color */
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r = l->surface.primary->r;
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r += r >> 1;
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g = l->surface.primary->g;
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g += g >> 1;
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b = l->surface.primary->b;
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b += b >> 1;
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if (r > 0xFF) r = 0xFF;
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if (g > 0xFF) g = 0xFF;
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if (b > 0xFF) b = 0xFF;
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g_assert(!l->surface.bevel_light);
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l->surface.bevel_light = RrColorNew(l->inst, r, g, b);
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/* dark color */
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r = l->surface.primary->r;
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r = (r >> 1) + (r >> 2);
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g = l->surface.primary->g;
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g = (g >> 1) + (g >> 2);
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b = l->surface.primary->b;
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b = (b >> 1) + (b >> 2);
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g_assert(!l->surface.bevel_dark);
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l->surface.bevel_dark = RrColorNew(l->inst, r, g, b);
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}
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static void gradient_solid(RrAppearance *l, gint w, gint h)
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{
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gint i;
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RrPixel32 pix;
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RrPixel32 *data = l->surface.pixel_data;
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RrSurface *sp = &l->surface;
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gint left = 0, top = 0, right = w - 1, bottom = h - 1;
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pix = (sp->primary->r << RrDefaultRedOffset)
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+ (sp->primary->g << RrDefaultGreenOffset)
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+ (sp->primary->b << RrDefaultBlueOffset);
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for (i = 0; i < w * h; i++)
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*data++ = pix;
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if (sp->interlaced)
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return;
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XFillRectangle(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->primary),
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0, 0, w, h);
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switch (sp->relief) {
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case RR_RELIEF_RAISED:
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if (!sp->bevel_dark)
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create_bevel_colors(l);
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switch (sp->bevel) {
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case RR_BEVEL_1:
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XDrawLine(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->bevel_dark),
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left, bottom, right, bottom);
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XDrawLine(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->bevel_dark),
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right, bottom, right, top);
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XDrawLine(RrDisplay(l->inst), l->pixmap,RrColorGC(sp->bevel_light),
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left, top, right, top);
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XDrawLine(RrDisplay(l->inst), l->pixmap,RrColorGC(sp->bevel_light),
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left, bottom, left, top);
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break;
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case RR_BEVEL_2:
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XDrawLine(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->bevel_dark),
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left + 2, bottom - 1, right - 2, bottom - 1);
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XDrawLine(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->bevel_dark),
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right - 1, bottom - 1, right - 1, top + 1);
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XDrawLine(RrDisplay(l->inst), l->pixmap,RrColorGC(sp->bevel_light),
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left + 2, top + 1, right - 2, top + 1);
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XDrawLine(RrDisplay(l->inst), l->pixmap,RrColorGC(sp->bevel_light),
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left + 1, bottom - 1, left + 1, top + 1);
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break;
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default:
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g_assert_not_reached(); /* unhandled BevelType */
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}
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break;
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case RR_RELIEF_SUNKEN:
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if (!sp->bevel_dark)
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create_bevel_colors(l);
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switch (sp->bevel) {
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case RR_BEVEL_1:
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XDrawLine(RrDisplay(l->inst), l->pixmap,RrColorGC(sp->bevel_light),
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left, bottom, right, bottom);
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XDrawLine(RrDisplay(l->inst), l->pixmap,RrColorGC(sp->bevel_light),
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right, bottom, right, top);
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XDrawLine(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->bevel_dark),
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left, top, right, top);
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XDrawLine(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->bevel_dark),
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left, bottom, left, top);
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break;
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case RR_BEVEL_2:
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XDrawLine(RrDisplay(l->inst), l->pixmap,RrColorGC(sp->bevel_light),
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left + 2, bottom - 1, right - 2, bottom - 1);
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XDrawLine(RrDisplay(l->inst), l->pixmap,RrColorGC(sp->bevel_light),
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right - 1, bottom - 1, right - 1, top + 1);
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XDrawLine(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->bevel_dark),
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left + 2, top + 1, right - 2, top + 1);
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XDrawLine(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->bevel_dark),
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left + 1, bottom - 1, left + 1, top + 1);
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break;
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default:
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g_assert_not_reached(); /* unhandled BevelType */
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}
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break;
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case RR_RELIEF_FLAT:
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if (sp->border) {
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XDrawRectangle(RrDisplay(l->inst), l->pixmap,
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RrColorGC(sp->border_color),
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left, top, right, bottom);
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}
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break;
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default:
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g_assert_not_reached(); /* unhandled ReliefType */
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}
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}
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/* * * * * * * * * * * * * * GRADIENT MAGIC WOOT * * * * * * * * * * * * * * */
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#define VARS(x) \
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guint color##x[3]; \
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gint len##x, cdelta##x[3], error##x[3] = { 0, 0, 0 }, inc##x[3]; \
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gboolean bigslope##x[3] /* color slope > 1 */
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#define SETUP(x, from, to, w) \
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len##x = w; \
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\
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color##x[0] = from->r; \
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color##x[1] = from->g; \
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color##x[2] = from->b; \
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\
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cdelta##x[0] = to->r - from->r; \
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cdelta##x[1] = to->g - from->g; \
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cdelta##x[2] = to->b - from->b; \
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\
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if (cdelta##x[0] < 0) { \
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cdelta##x[0] = -cdelta##x[0]; \
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inc##x[0] = -1; \
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} else \
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inc##x[0] = 1; \
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if (cdelta##x[1] < 0) { \
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cdelta##x[1] = -cdelta##x[1]; \
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inc##x[1] = -1; \
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} else \
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inc##x[1] = 1; \
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if (cdelta##x[2] < 0) { \
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cdelta##x[2] = -cdelta##x[2]; \
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inc##x[2] = -1; \
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} else \
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inc##x[2] = 1; \
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bigslope##x[0] = cdelta##x[0] > w;\
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bigslope##x[1] = cdelta##x[1] > w;\
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bigslope##x[2] = cdelta##x[2] > w
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#define COLOR_RR(x, c) \
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c->r = color##x[0]; \
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c->g = color##x[1]; \
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c->b = color##x[2]
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#define COLOR(x) \
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((color##x[0] << RrDefaultRedOffset) + \
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(color##x[1] << RrDefaultGreenOffset) + \
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(color##x[2] << RrDefaultBlueOffset))
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#define INCREMENT(x, i) \
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(inc##x[i])
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#define NEXT(x) \
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{ \
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gint i; \
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for (i = 2; i >= 0; --i) { \
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if (!cdelta##x[i]) continue; \
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\
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if (!bigslope##x[i]) { \
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/* Y (color) is dependant on X */ \
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error##x[i] += cdelta##x[i]; \
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if ((error##x[i] << 1) >= len##x) { \
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color##x[i] += INCREMENT(x, i); \
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error##x[i] -= len##x; \
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} \
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} else { \
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/* X is dependant on Y (color) */ \
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while (1) { \
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color##x[i] += INCREMENT(x, i); \
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error##x[i] += len##x; \
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if ((error##x[i] << 1) >= cdelta##x[i]) { \
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error##x[i] -= cdelta##x[i]; \
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break; \
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} \
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} \
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} \
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} \
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}
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static void gradient_splitvertical(RrAppearance *a, gint w, gint h)
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{
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gint x, y1, y3, r, g, b;
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RrSurface *sf = &a->surface;
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RrPixel32 *data = sf->pixel_data;
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RrPixel32 current;
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RrColor *primary_light, *secondary_light;
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VARS(y1);
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VARS(y3);
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r = sf->primary->r;
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r += r >> 2;
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g = sf->primary->g;
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g += g >> 2;
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b = sf->primary->b;
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b += b >> 2;
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if (r > 0xFF) r = 0xFF;
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if (g > 0xFF) g = 0xFF;
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if (b > 0xFF) b = 0xFF;
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primary_light = RrColorNew(a->inst, r, g, b);
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r = sf->secondary->r;
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r += r >> 4;
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g = sf->secondary->g;
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g += g >> 4;
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b = sf->secondary->b;
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b += b >> 4;
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if (r > 0xFF) r = 0xFF;
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if (g > 0xFF) g = 0xFF;
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if (b > 0xFF) b = 0xFF;
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secondary_light = RrColorNew(a->inst, r, g, b);
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SETUP(y1, primary_light, sf->primary, (h / 2) -1);
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SETUP(y3, sf->secondary, secondary_light, (h / 2) -1);
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for (y1 = h - 1; y1 > (h / 2) -1; --y1) { /* 0 -> h-1 */
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current = COLOR(y1);
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for (x = w - 1; x >= 0; --x) /* 0 -> w */
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*(data++) = current;
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NEXT(y1);
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}
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for (y3 = (h / 2) - 1; y3 > 0; --y3) {
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current = COLOR(y3);
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for (x = w - 1; x >= 0; --x)
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*(data++) = current;
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NEXT(y3);
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}
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current = COLOR(y3);
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for (x = w - 1; x >= 0; --x) /* 0 -> w */
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*(data++) = current;
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RrColorFree(primary_light);
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RrColorFree(secondary_light);
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}
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static void gradient_horizontal(RrSurface *sf, gint w, gint h)
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{
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gint x, y;
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RrPixel32 *data = sf->pixel_data, *datav;
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RrPixel32 current;
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VARS(x);
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SETUP(x, sf->primary, sf->secondary, w);
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for (x = w - 1; x > 0; --x) { /* 0 -> w-1 */
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current = COLOR(x);
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datav = data;
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for (y = h - 1; y >= 0; --y) { /* 0 -> h */
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*datav = current;
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datav += w;
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}
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++data;
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NEXT(x);
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}
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current = COLOR(x);
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for (y = h - 1; y >= 0; --y) /* 0 -> h */
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*(data + y * w) = current;
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}
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static void gradient_mirrorhorizontal(RrSurface *sf, gint w, gint h)
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{
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gint x, y;
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RrPixel32 *data = sf->pixel_data, *datav;
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RrPixel32 current;
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VARS(x);
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SETUP(x, sf->primary, sf->secondary, w/2);
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if (w > 1) {
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for (x = w - 1; x > w/2-1; --x) { /* 0 -> w-1 */
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current = COLOR(x);
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datav = data;
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for (y = h - 1; y >= 0; --y) { /* 0 -> h */
|
|
*datav = current;
|
|
datav += w;
|
|
}
|
|
++data;
|
|
|
|
NEXT(x);
|
|
}
|
|
SETUP(x, sf->secondary, sf->primary, w/2);
|
|
for (x = w/2 - 1; x > 0; --x) { /* 0 -> w-1 */
|
|
current = COLOR(x);
|
|
datav = data;
|
|
for (y = h - 1; y >= 0; --y) { /* 0 -> h */
|
|
*datav = current;
|
|
datav += w;
|
|
}
|
|
++data;
|
|
|
|
NEXT(x);
|
|
}
|
|
}
|
|
current = COLOR(x);
|
|
for (y = h - 1; y >= 0; --y) /* 0 -> h */
|
|
*(data + y * w) = current;
|
|
}
|
|
|
|
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;
|
|
}
|
|
|