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/* Framebuffer Graphics Libary for Linux, Copyright 1993 Harm Hanemaayer */
/* cbitmap.c Compiled bitmaps */
#include <stdio.h>
#include <stdlib.h>
#include <vga.h>
#include "inlstring.h" /* include inline string operations */
#include "vgagl.h"
#include "def.h"
void gl_compileboxmask(int w, int h, void *_dp1, void *_dp2)
{
/* Compiled format: <bytes_to_skip (0-254)><number_of_pixels (0-255)> */
/* <pixel_data>[<end_of_line(255)>]... */
uchar *dp1 = _dp1;
uchar *dp2 = _dp2;
int i;
for (i = 0; i < h; i++) {
int x = 0;
while (x < w) {
int count;
/* count zeroes */
count = 0;
while (x < w && *(dp1 + count) == 0 && count < 254) {
count++;
x++;
}
dp1 += count;
if (x < w) {
*dp2++ = count;
/* count nonzeroes */
count = 0;
while (x < w && *(dp1 + count) != 0 && count < 255) {
*(dp2 + count + 1) = *(dp1 + count);
count++;
x++;
}
*dp2 = count;
dp2 += count + 1;
dp1 += count;
}
}
*dp2++ = 0xff;
}
}
int gl_compiledboxmasksize(int w, int h, void *_dp1)
{
/* Compiled format: <bytes_to_skip (0-254)><number_of_pixels (0-255)> */
/* <pixel_data>[<end_of_line(255)>]... */
uchar *dp1 = _dp1;
int size = 0;
int i;
for (i = 0; i < h; i++) {
int x = 0;
while (x < w) {
int count;
/* count zeroes */
count = 0;
while (x < w && *(dp1 + count) == 0 && count < 254) {
count++;
x++;
}
size++;
dp1 += count;
/* count nonzeroes */
if (x < w) {
count = 0;
while (x < w && *(dp1 + count) != 0 && count < 255) {
count++;
x++;
}
size += count + 1;
dp1 += count;
}
}
size++;
}
return size;
}
static void gl_putboxmaskcompiledclip(int nx, int ny, int nw, int nh, int _x,
int _y, int w, int h, void *_dp)
{
/* Special case costly clipping */
uchar *dp = _dp;
uchar *vp, *vpline;
int y;
vpline = VBUF + _y * BYTEWIDTH + _x;
for (y = _y; y < ny + nh; y++) {
int x = _x;
vp = vpline;
for (;;) {
int count = *dp++;
if (count == 0xff)
break; /* end of line */
vp += count;
x += count;
count = *dp++;
/* __memcpy gives severe bug here */
if (y >= ny) {
if (x >= nx)
if (x + count > __clipx2 + 1) {
if (x <= __clipx2)
__memcpyb(vp, dp, __clipx2 - x + 1);
} else
__memcpyb(vp, dp, count);
else if (x + count > __clipx1) {
if (x + count > __clipx2 + 1)
__memcpyb(vp + __clipx1 - x,
dp + __clipx1 - x,
__clipx2 - __clipx1 + 1);
else
__memcpy(vp + __clipx1 - x,
dp + __clipx1 - x,
count - __clipx1 + x);
};
};
x += count;
vp += count;
dp += count;
}
vpline += BYTEWIDTH;
}
}
#define ADJUSTBITMAPBOX() \
nw = w; nh = h; nx = x; ny = y; \
if (nx + nw < __clipx1 || nx > __clipx2) \
return; \
if (ny + nh < __clipy1 || ny > __clipy2) \
return; \
if (nx < __clipx1) { /* left adjust */ \
nw += nx - __clipx1; \
nx = __clipx1; \
} \
if (ny < __clipy1) { /* top adjust */ \
nh += ny - __clipy1; \
ny = __clipy1; \
} \
if (nx + nw > __clipx2) /* right adjust */ \
nw = __clipx2 - nx + 1; \
if (ny + nh > __clipy2) /* bottom adjust */ \
nh = __clipy2 - ny + 1; \
void gl_putboxmaskcompiled(int x, int y, int w, int h, void *_dp)
{
/* no clipping */
uchar *dp = _dp;
uchar *vp, *vpline;
int i;
if (MODETYPE != CONTEXT_LINEAR && MODETYPE != CONTEXT_VIRTUAL) {
printf("vgagl: putboxmaskcompiled only supported in linear framebuffer\n");
return;
}
if (__clip) {
int nx, ny, nw, nh;
ADJUSTBITMAPBOX();
if (nw != w || nh != h) {
gl_putboxmaskcompiledclip(nx, ny, nw, nh, x, y, w, h,
dp);
return;
}
}
vpline = VBUF + y * BYTEWIDTH + x;
for (i = 0; i < h; i++) {
vp = vpline;
for (;;) {
int count = *dp++;
if (count == 0xff)
break; /* end of line */
vp += count;
count = *dp++;
/* __memcpy gives severe bug here */
__memcpyb(vp, dp, count);
vp += count;
dp += count;
}
vpline += BYTEWIDTH;
}
}
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