markmental/evil-qemacs
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions
evil-qemacs/cfb.c
Charlie Gordon d286b27756 made more local variables static 
fixed bug in cfb32_fill_rectangle
use c99 syntax for new style struct initializers instead of gcc specific
simplified tolower unsigned char hacks
fixed various sparse warnings
2007-12-06 17:43:47 +00:00

352 lines
9 KiB
C
Raw Blame History

/*
* Frame buffer low level functions for QEmacs
*
* Copyright (c) 2001, 2002 Fabrice Bellard.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "qe.h"
#include "cfb.h"
#include "fbfrender.h"
static unsigned int cfb15_get_color(unsigned int color)
{
unsigned int r, g, b;
r = (color >> 16) & 0xff;
g = (color >> 8) & 0xff;
b = (color) & 0xff;
return ((((r) >> 3) << 10) | (((g) >> 3) << 5) | ((b) >> 3));
}
static unsigned int cfb16_get_color(unsigned int color)
{
unsigned int r, g, b;
r = (color >> 16) & 0xff;
g = (color >> 8) & 0xff;
b = (color) & 0xff;
return ((((r) >> 3) << 11) | (((g) >> 2) << 5) | ((b) >> 3));
}
static unsigned int cfb24_get_color(unsigned int color)
{
return color & 0xffffff;
}
static void cfb16_fill_rectangle(QEditScreen *s,
int x1, int y1, int w, int h, QEColor color)
{
CFBContext *cfb = s->private;
unsigned char *dest, *d;
int y, n;
unsigned int col;
col = cfb->get_color(color);
col = (col << 16) | col;
dest = cfb->base + y1 * cfb->wrap + x1 * 2;
if (color == QECOLOR_XOR) {
/* XXX: suppress this mess */
for (y = 0; y < h; y++) {
d = dest;
for (n = w; n != 0; n--) {
((short *)d)[0] ^= 0xffff;
d += 2;
}
dest += cfb->wrap;
}
} else {
for (y = 0; y < h; y++) {
d = dest;
n = w;
if (((int)d & 3) != 0) {
((short *)d)[0] = col;
d += 2;
n--;
}
while (n >= 8) {
((int *)d)[0] = col;
((int *)d)[1] = col;
((int *)d)[2] = col;
((int *)d)[3] = col;
d += 16;
n -= 8;
}
while (n > 0) {
((short *)d)[0] = col;
d += 2;
n--;
}
dest += cfb->wrap;
}
}
}
static void cfb32_fill_rectangle(QEditScreen *s,
int x1, int y1, int w, int h, QEColor color)
{
CFBContext *cfb = s->private;
unsigned char *dest, *d;
int y, n;
unsigned int col;
col = cfb->get_color(color);
dest = cfb->base + y1 * cfb->wrap + x1 * 4;
if (color == QECOLOR_XOR) {
/* XXX: suppress this mess */
for (y = 0; y < h; y++) {
d = dest;
for (n = w; n != 0; n--) {
((int *)d)[0] ^= 0x00ffffff;
d += 4;
}
dest += cfb->wrap;
}
} else {
for (y = 0; y < h; y++) {
d = dest;
n = w;
while (n >= 4) {
((int *)d)[0] = col;
((int *)d)[1] = col;
((int *)d)[2] = col;
((int *)d)[3] = col;
d += 16;
n -= 4;
}
while (n > 0) {
((int *)d)[0] = col;
d += 4;
n--;
}
dest += cfb->wrap;
}
}
}
static void cfb16_draw_glyph(QEditScreen *s1,
int x1, int y1, int w, int h, QEColor color,
unsigned char *glyph, int glyph_wrap)
{
CFBContext *cfb = s1->private;
unsigned char *dest, *d, *s, *src;
int n;
unsigned int col;
col = cfb->get_color(color);
dest = cfb->base + y1 * cfb->wrap + x1 * 2;
src = glyph;
while (h > 0) {
n = w;
s = src;
d = dest;
while (n >= 4) {
if (s[0] >= 0x80)
((short *)d)[0] = col;
if (s[1] >= 0x80)
((short *)d)[1] = col;
if (s[2] >= 0x80)
((short *)d)[2] = col;
if (s[3] >= 0x80)
((short *)d)[3] = col;
s += 4;
d += 4 * 2;
n -= 4;
}
while (n > 0) {
if (s[0] >= 0x80)
((short *)d)[0] = col;
s++;
d += 2;
n--;
}
h--;
src += glyph_wrap;
dest += cfb->wrap;
}
}
static void cfb32_draw_glyph(QEditScreen *s1,
int x1, int y1, int w, int h, QEColor color,
unsigned char *glyph, int glyph_wrap)
{
CFBContext *cfb = s1->private;
unsigned char *dest, *d, *s, *src;
int n;
unsigned int col;
col = cfb->get_color(color);
dest = cfb->base + y1 * cfb->wrap + x1 * 4;
src = glyph;
while (h > 0) {
n = w;
s = src;
d = dest;
while (n >= 4) {
if (s[0] >= 0x80)
((int *)d)[0] = col;
if (s[1] >= 0x80)
((int *)d)[1] = col;
if (s[2] >= 0x80)
((int *)d)[2] = col;
if (s[3] >= 0x80)
((int *)d)[3] = col;
s += 4;
d += 4 * 4;
n -= 4;
}
while (n > 0) {
if (s[0] >= 0x80)
((int *)d)[0] = col;
s++;
d += 4;
n--;
}
h--;
src += glyph_wrap;
dest += cfb->wrap;
}
}
static void cfb_draw_text(QEditScreen *s, QEFont *font,
int x_start, int y, const unsigned int *str, int len,
QEColor color)
{
CFBContext *cfb = s->private;
GlyphCache *g;
unsigned char *glyph_ptr;
int i, x1, y1, x2, y2, wrap, x;
unsigned int cc;
x = x_start;
for (i = 0;i < len; i++) {
cc = str[i];
g = decode_cached_glyph(s, font, cc);
if (!g)
continue;
x1 = x + g->x;
x2 = x1 + g->w;
y2 = y - g->y;
y1 = y2 - g->h;
glyph_ptr = g->data;
wrap = g->w;
if (x1 >= s->clip_x1 && y1 >= s->clip_y1 &&
x2 <= s->clip_x2 && y2 <= s->clip_y2)
goto draw;
if (x2 <= s->clip_x1 || y2 <= s->clip_y1 ||
x1 >= s->clip_x2 || y1 >= s->clip_y2)
goto nodraw;
if (x1 < s->clip_x1) {
glyph_ptr += s->clip_x1 - x1;
x1 = s->clip_x1;
}
if (x2 > s->clip_x2)
x2 = s->clip_x2;
if (y1 < s->clip_y1) {
glyph_ptr += (s->clip_y1 - y1) * wrap;
y1 = s->clip_y1;
}
if (y2 > s->clip_y2)
y2 = s->clip_y2;
draw:
cfb->draw_glyph(s, x1, y1,
x2 - x1, y2 - y1,
color, glyph_ptr, wrap);
nodraw:
x += g->xincr;
}
/* underline synthesis */
if (font->style & (QE_STYLE_UNDERLINE | QE_STYLE_LINE_THROUGH)) {
int dy, h, w;
h = (font->descent + 2) / 4;
if (h < 1)
h = 1;
w = x - x_start;
if (font->style & QE_STYLE_UNDERLINE) {
dy = (font->descent + 1) / 3;
fill_rectangle(s, x_start, y + dy, w, h, color);
}
if (font->style & QE_STYLE_LINE_THROUGH) {
dy = -(font->ascent / 2 - 1);
fill_rectangle(s, x_start, y + dy, w, h, color);
}
}
}
static void cfb_set_clip(__unused__ QEditScreen *s,
__unused__ int x, __unused__ int y,
__unused__ int w, __unused__ int h)
{
}
int cfb_init(QEditScreen *s,
void *base, int wrap, int depth, const char *font_path)
{
CFBContext *cfb = s->private;
cfb->base = base;
cfb->wrap = wrap;
cfb->depth = depth;
cfb->bpp = (depth + 7) / 8;
switch (depth) {
case 15:
cfb->get_color = cfb15_get_color;
break;
case 16:
cfb->get_color = cfb16_get_color;
break;
case 24:
default:
cfb->get_color = cfb24_get_color;
break;
}
switch (cfb->bpp) {
case 2:
s->dpy.dpy_fill_rectangle = cfb16_fill_rectangle;
cfb->draw_glyph = cfb16_draw_glyph;
break;
default:
case 4:
s->dpy.dpy_fill_rectangle = cfb32_fill_rectangle;
cfb->draw_glyph = cfb32_draw_glyph;
break;
}
s->dpy.dpy_set_clip = cfb_set_clip;
s->dpy.dpy_draw_text = cfb_draw_text;
/* fbf font handling init */
s->dpy.dpy_text_metrics = fbf_text_metrics;
s->dpy.dpy_open_font = fbf_open_font;
s->dpy.dpy_close_font = fbf_close_font;
return fbf_render_init(font_path);
}
Reference in a new issue View git blame Copy permalink