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-rw-r--r--render/gradient.c836
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diff --git a/render/gradient.c b/render/gradient.c
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-/* -*- 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;
- register 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)
-{
- register 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)
-{
- register 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);
-}
-
-/*! Repeat the first pixel over the entire block of memory
- @param start The block of memory. start[0] will be copied
- to the rest of the block.
- @param w The width of the block of memory (including the already-set first
- element
-*/
-static inline void repeat_pixel(RrPixel32 *start, gint w)
-{
- register gint x;
- RrPixel32 *dest;
-
- dest = start + 1;
-
- /* for really small things, just copy ourselves */
- if (w < 8) {
- for (x = w-1; x > 0; --x)
- *(dest++) = *start;
- }
-
- /* for >= 8, then use O(log n) memcpy's... */
- else {
- gchar *cdest;
- gint lenbytes;
-
- /* copy the first 3 * 32 bits (3 words) ourselves - then we have
- 3 + the original 1 = 4 words to make copies of at a time
-
- this is faster than doing memcpy for 1 or 2 words at a time
- */
- for (x = 3; x > 0; --x)
- *(dest++) = *start;
-
- /* cdest is a pointer to the pixel data that is typed char* so that
- adding 1 to its position moves it only one byte
-
- lenbytes is the amount of bytes that we will be copying each
- iteration. this doubles each time through the loop.
-
- x is the number of bytes left to copy into. lenbytes will alwaysa
- be bounded by x
-
- this loop will run O(log n) times (n is the number of bytes we
- need to copy into), since the size of the copy is doubled each
- iteration. it seems that gcc does some nice optimizations to make
- this memcpy very fast on hardware with support for vector operations
- such as mmx or see. here is an idea of the kind of speed up we are
- getting by doing this (splitvertical3 switches from doing
- "*(data++) = color" n times to doing this memcpy thing log n times:
-
- % cumulative self self total
- time seconds seconds calls ms/call ms/call name
- 49.44 0.88 0.88 1063 0.83 0.83 splitvertical1
- 47.19 1.72 0.84 1063 0.79 0.79 splitvertical2
- 2.81 1.77 0.05 1063 0.05 0.05 splitvertical3
- */
- cdest = (gchar*)dest;
- lenbytes = 4 * sizeof(RrPixel32);
- for (x = (w - 4) * sizeof(RrPixel32); x > 0;) {
- memcpy(cdest, start, lenbytes);
- x -= lenbytes;
- cdest += lenbytes;
- lenbytes <<= 1;
- if (lenbytes > x)
- lenbytes = x;
- }
- }
-}
-
-static void gradient_parentrelative(RrAppearance *a, gint w, gint h)
-{
- RrPixel32 *source, *dest;
- gint sw, sh, partial_w, partial_h;
- register gint 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)
-{
- register 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) \
- register gint len##x; \
- guint color##x[3]; \
- gint 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) \
-{ \
- register 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)
-{
- register gint y1, y2, y3;
- RrSurface *sf = &a->surface;
- RrPixel32 *data;
- register 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 & 1);
- y3sz = MAX(h/2, 1);
- }
- else {
- y1sz = h/2 - (1 - (h & 1));
- 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);
-
- /* find the color for the first pixel of each row first */
- data = sf->pixel_data;
-
- for (y1 = y1sz-1; y1 > 0; --y1) {
- *data = COLOR(y1);
- data += w;
- NEXT(y1);
- }
- *data = COLOR(y1);
- data += w;
- if (y2sz) {
- for (y2 = y2sz-1; y2 > 0; --y2) {
- *data = COLOR(y2);
- data += w;
- NEXT(y2);
- }
- *data = COLOR(y2);
- data += w;
- }
- for (y3 = y3sz-1; y3 > 0; --y3) {
- *data = COLOR(y3);
- data += w;
- NEXT(y3);
- }
- *data = COLOR(y3);
-
- /* copy the first pixels into the whole rows */
- data = sf->pixel_data;
- for (y1 = h; y1 > 0; --y1) {
- repeat_pixel(data, w);
- data += w;
- }
-}
-
-static void gradient_horizontal(RrSurface *sf, gint w, gint h)
-{
- register gint x, y, cpbytes;
- RrPixel32 *data = sf->pixel_data, *datav;
- gchar *datac;
-
- VARS(x);
- SETUP(x, sf->primary, sf->secondary, w);
-
- /* set the color values for the first row */
- datav = data;
- for (x = w - 1; x > 0; --x) { /* 0 -> w - 1 */
- *datav = COLOR(x);
- ++datav;
- NEXT(x);
- }
- *datav = COLOR(x);
- ++datav;
-
- /* copy the first row to the rest in O(logn) copies */
- datac = (gchar*)datav;
- cpbytes = 1 * w * sizeof(RrPixel32);
- for (y = (h - 1) * w * sizeof(RrPixel32); y > 0;) {
- memcpy(datac, data, cpbytes);
- y -= cpbytes;
- datac += cpbytes;
- cpbytes <<= 1;
- if (cpbytes > y)
- cpbytes = y;
- }
-}
-
-static void gradient_mirrorhorizontal(RrSurface *sf, gint w, gint h)
-{
- register gint x, y, half1, half2, cpbytes;
- RrPixel32 *data = sf->pixel_data, *datav;
- gchar *datac;
-
- VARS(x);
-
- half1 = (w + 1) / 2;
- half2 = w / 2;
-
- /* set the color values for the first row */
-
- 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;
- }
-
- /* copy the first row to the rest in O(logn) copies */
- datac = (gchar*)datav;
- cpbytes = 1 * w * sizeof(RrPixel32);
- for (y = (h - 1) * w * sizeof(RrPixel32); y > 0;) {
- memcpy(datac, data, cpbytes);
- y -= cpbytes;
- datac += cpbytes;
- cpbytes <<= 1;
- if (cpbytes > y)
- cpbytes = y;
- }
-}
-
-static void gradient_vertical(RrSurface *sf, gint w, gint h)
-{
- register gint y;
- RrPixel32 *data;
-
- VARS(y);
- SETUP(y, sf->primary, sf->secondary, h);
-
- /* find the color for the first pixel of each row first */
- data = sf->pixel_data;
-
- for (y = h - 1; y > 0; --y) { /* 0 -> h-1 */
- *data = COLOR(y);
- data += w;
- NEXT(y);
- }
- *data = COLOR(y);
-
- /* copy the first pixels into the whole rows */
- data = sf->pixel_data;
- for (y = h; y > 0; --y) {
- repeat_pixel(data, w);
- data += w;
- }
-}
-
-static void gradient_diagonal(RrSurface *sf, gint w, gint h)
-{
- register 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)
-{
- register 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 w, gint h)
-{
- RrPixel32 *ldata, *rdata;
- RrPixel32 *cp;
- RrColor left, right;
- RrColor extracorner;
- register gint x, y, halfw, halfh, midx, midy;
-
- 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;
-
- halfw = w >> 1;
- halfh = h >> 1;
- midx = w - halfw - halfw; /* 0 or 1, depending if w is even or odd */
- midy = h - halfh - halfh; /* 0 or 1, depending if h is even or odd */
-
- SETUP(lefty, sf->primary, (&extracorner), halfh + midy);
- SETUP(righty, (&extracorner), sf->secondary, halfh + midy);
-
- /* draw the top half
-
- it is faster to draw both top quarters together than to draw one and
- then copy it over to the other side.
- */
-
- ldata = sf->pixel_data;
- rdata = ldata + w - 1;
- for (y = halfh + midy; y > 0; --y) { /* 0 -> (h+1)/2 */
- RrPixel32 c;
-
- COLOR_RR(lefty, (&left));
- COLOR_RR(righty, (&right));
-
- SETUP(x, (&left), (&right), halfw + midx);
-
- for (x = halfw + midx - 1; x > 0; --x) { /* 0 -> (w+1)/2 */
- c = COLOR(x);
- *(ldata++) = *(rdata--) = c;
-
- NEXT(x);
- }
- c = COLOR(x);
- *ldata = *rdata = c;
- ldata += halfw + 1;
- rdata += halfw - 1 + midx + w;
-
- NEXT(lefty);
- NEXT(righty);
- }
-
- /* copy the top half into the bottom half, mirroring it, so we can only
- copy one row at a time
-
- it is faster, to move the writing pointer forward, and the reading
- pointer backward
-
- this is the current code, moving the write pointer forward and read
- pointer backward
- 41.78 4.26 1.78 504 3.53 3.53 gradient_pyramid2
- this is the opposite, moving the read pointer forward and the write
- pointer backward
- 42.27 4.40 1.86 504 3.69 3.69 gradient_pyramid2
-
- */
- ldata = sf->pixel_data + (halfh - 1) * w;
- cp = ldata + (midy + 1) * w;
- for (y = halfh; y > 0; --y) {
- memcpy(cp, ldata, w * sizeof(RrPixel32));
- ldata -= w;
- cp += w;
- }
-}
generated by cgit v1.2.3 (git 2.25.1) at 2026-02-17 23:37:16 +0000