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[w3m-dev 03300] framebuffer: 8bit color support

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* w3mimg/fb/fb.c: support FB_VISUAL_PSEUDOCOLOR 256 colors
From: Hiroyuki Ito <hito@crl.go.jp>
This commit is contained in:
Fumitoshi UKAI
2002-09-09 14:03:44 +00:00
parent 0317882329
commit 0e63c0c10c
2 changed files with 195 additions and 39 deletions
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227
w3mimg/fb/fb.c
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@@ -1,4 +1,4 @@
/* $Id: fb.c,v 1.6 2002/07/30 16:03:01 ukai Exp $ */
/* $Id: fb.c,v 1.7 2002/09/09 14:03:45 ukai Exp $ */
/**************************************************************************
fb.c 0.3 Copyright (C) 2002, hito
**************************************************************************/
@@ -18,6 +18,20 @@
#define FB_ENV "FRAMEBUFFER"
#define FB_DEFDEV "/dev/fb0"
#define MONO_OFFSET_8BIT 0x40
#define COLORS_MONO_8BIT 0x40
#define MONO_MASK_8BIT 0xFC
#define MONO_SHIFT_8BIT 2
#define COLOR_OFFSET_8BIT 0x80
#define COLORS_8BIT 0x80
#define RED_MASK_8BIT 0xC0
#define GREEN_MASK_8BIT 0xE0
#define BLUE_MASK_8BIT 0xC0
#define RED_SHIFT_8BIT 1
#define GREEN_SHIFT_8BIT 3
#define BLUE_SHIFT_8BIT 6
#define FALSE 0
#define TRUE 1
@@ -30,10 +44,14 @@ static int fb_fscrn_get(int fbfp, struct fb_fix_screeninfo *scinfo);
static void *fb_mmap(int fbfp, struct fb_fix_screeninfo *scinfo);
static int fb_munmap(void *buf, struct fb_fix_screeninfo *scinfo);
static int fb_vscrn_get(int fbfp, struct fb_var_screeninfo *scinfo);
static int fb_cmap_set(int fbfp, struct fb_cmap *cmap);
static int fb_cmap_get(int fbfp, struct fb_cmap *cmap);
static int fb_cmap_init(void);
static int fb_get_cmap_index(int r, int g, int b);
static struct fb_fix_screeninfo fscinfo;
static struct fb_var_screeninfo vscinfo;
static struct fb_cmap *cmap = NULL;
static struct fb_cmap *cmap = NULL, *cmap_org = NULL;
static int is_open = FALSE;
static int fbfp = -1;
static size_t pixel_size = 0;
@@ -78,17 +96,31 @@ fb_open(void)
goto ERR_END;
}
if (!((fscinfo.visual == FB_VISUAL_TRUECOLOR ||
fscinfo.visual == FB_VISUAL_DIRECTCOLOR) &&
(vscinfo.bits_per_pixel == 15 ||
vscinfo.bits_per_pixel == 16 ||
vscinfo.bits_per_pixel == 24 || vscinfo.bits_per_pixel == 32))) {
if (fscinfo.visual == FB_VISUAL_PSEUDOCOLOR && vscinfo.bits_per_pixel == 8) {
if (fb_cmap_get(fbfp, cmap)) {
fprintf(stderr, "Can't get color map.\n");
fb_cmap_destroy(cmap);
cmap = NULL;
goto ERR_END;
}
if (fb_cmap_init())
goto ERR_END;
pixel_size = 1;
}
else if ((fscinfo.visual == FB_VISUAL_TRUECOLOR ||
fscinfo.visual == FB_VISUAL_DIRECTCOLOR) &&
(vscinfo.bits_per_pixel == 15 ||
vscinfo.bits_per_pixel == 16 ||
vscinfo.bits_per_pixel == 24 || vscinfo.bits_per_pixel == 32)) {
pixel_size = (vscinfo.bits_per_pixel + 7) / CHAR_BIT;
}
else {
fprintf(stderr, "This type of framebuffer is not supported.\n");
goto ERR_END;
}
pixel_size = (vscinfo.bits_per_pixel + 7) / CHAR_BIT;
is_open = TRUE;
return 0;
@@ -107,6 +139,11 @@ fb_close(void)
fb_cmap_destroy(cmap);
cmap = NULL;
}
if (cmap_org != NULL) {
fb_cmap_set(fbfp, cmap_org);
fb_cmap_destroy(cmap_org);
cmap = NULL;
}
if (buf != NULL) {
fb_munmap(buf, &fscinfo);
buf = NULL;
@@ -171,20 +208,23 @@ void
fb_image_pset(FB_IMAGE * image, int x, int y, int r, int g, int b)
{
unsigned long work;
int offset;
if (image == NULL || is_open != TRUE || x >= image->width
|| y >= image->height)
return;
offset = image->rowstride * y + pixel_size * x;
work =
((r >> (CHAR_BIT - vscinfo.red.length)) << vscinfo.red.offset) +
((g >> (CHAR_BIT - vscinfo.green.length)) << vscinfo.green.offset) +
((b >> (CHAR_BIT - vscinfo.blue.length)) << vscinfo.blue.offset);
memcpy(image->data + offset, &work, pixel_size);
if (pixel_size == 1) {
work = fb_get_cmap_index(r, g, b);
}
else {
work =
((r >> (CHAR_BIT - vscinfo.red.length)) << vscinfo.red.offset) +
((g >> (CHAR_BIT - vscinfo.green.length)) << vscinfo.green.
offset) +
((b >> (CHAR_BIT - vscinfo.blue.length)) << vscinfo.blue.offset);
}
memcpy(image->data + image->rowstride * y + pixel_size * x, &work,
pixel_size);
}
void
@@ -196,10 +236,16 @@ fb_image_fill(FB_IMAGE * image, int r, int g, int b)
if (image == NULL || is_open != TRUE)
return;
work =
((r >> (CHAR_BIT - vscinfo.red.length)) << vscinfo.red.offset) +
((g >> (CHAR_BIT - vscinfo.green.length)) << vscinfo.green.offset) +
((b >> (CHAR_BIT - vscinfo.blue.length)) << vscinfo.blue.offset);
if (pixel_size == 1) {
work = fb_get_cmap_index(r, g, b);
}
else {
work =
((r >> (CHAR_BIT - vscinfo.red.length)) << vscinfo.red.offset) +
((g >> (CHAR_BIT - vscinfo.green.length)) << vscinfo.green.
offset) +
((b >> (CHAR_BIT - vscinfo.blue.length)) << vscinfo.blue.offset);
}
for (offset = 0; offset < image->len; offset += pixel_size) {
memcpy(image->data + offset, &work, pixel_size);
@@ -266,7 +312,8 @@ fb_image_rotate(FB_IMAGE * image, int direction)
ofst -= image->rowstride;
}
}
} else {
}
else {
for (x = image->rowstride - pixel_size; x >= 0; x -= pixel_size) {
ofst = x;
for (y = 0; y < image->height; y++) {
@@ -369,10 +416,16 @@ fb_pset(int x, int y, int r, int g, int b)
if (offset >= fscinfo.smem_len)
return;
work =
((r >> (CHAR_BIT - vscinfo.red.length)) << vscinfo.red.offset) +
((g >> (CHAR_BIT - vscinfo.green.length)) << vscinfo.green.offset) +
((b >> (CHAR_BIT - vscinfo.blue.length)) << vscinfo.blue.offset);
if (pixel_size == 1) {
work = fb_get_cmap_index(r, g, b);
}
else {
work =
((r >> (CHAR_BIT - vscinfo.red.length)) << vscinfo.red.offset) +
((g >> (CHAR_BIT - vscinfo.green.length)) << vscinfo.green.
offset) +
((b >> (CHAR_BIT - vscinfo.blue.length)) << vscinfo.blue.offset);
}
memcpy(buf + offset, &work, pixel_size);
}
@@ -392,15 +445,27 @@ fb_get_color(int x, int y, int *r, int *g, int *b)
memcpy(&work, buf + offset, pixel_size);
*r = ((work >> vscinfo.red.
offset) & (0x000000ff >> (CHAR_BIT - vscinfo.red.length)))
<< (CHAR_BIT - vscinfo.red.length);
*g = ((work >> vscinfo.green.
offset) & (0x000000ff >> (CHAR_BIT - vscinfo.green.length)))
<< (CHAR_BIT - vscinfo.green.length);
*b = ((work >> vscinfo.blue.
offset) & (0x000000ff >> (CHAR_BIT - vscinfo.blue.length)))
<< (CHAR_BIT - vscinfo.blue.length);
if (pixel_size == 1) {
if (cmap == NULL)
return 1;
if (cmap->red)
*r = *(cmap->red + work) >> CHAR_BIT;
if (cmap->green)
*g = *(cmap->green + work) >> CHAR_BIT;
if (cmap->blue)
*b = *(cmap->blue + work) >> CHAR_BIT;
}
else {
*r = ((work >> vscinfo.red.
offset) & (0x000000ff >> (CHAR_BIT - vscinfo.red.length)))
<< (CHAR_BIT - vscinfo.red.length);
*g = ((work >> vscinfo.green.
offset) & (0x000000ff >> (CHAR_BIT - vscinfo.green.length)))
<< (CHAR_BIT - vscinfo.green.length);
*b = ((work >> vscinfo.blue.
offset) & (0x000000ff >> (CHAR_BIT - vscinfo.blue.length)))
<< (CHAR_BIT - vscinfo.blue.length);
}
return 0;
}
@@ -697,6 +762,93 @@ fb_vscrn_disp(void)
}
/********* static functions **************/
static
int
fb_get_cmap_index(int r, int g, int b)
{
int work;
if ((r & GREEN_MASK_8BIT) == (g & GREEN_MASK_8BIT)
&& (g & GREEN_MASK_8BIT) == (b & GREEN_MASK_8BIT)) {
work = (r >> MONO_SHIFT_8BIT) + MONO_OFFSET_8BIT;
}
else {
work = ((r & RED_MASK_8BIT) >> RED_SHIFT_8BIT)
+ ((g & GREEN_MASK_8BIT) >> GREEN_SHIFT_8BIT)
+ ((b & BLUE_MASK_8BIT) >> BLUE_SHIFT_8BIT)
+ COLOR_OFFSET_8BIT;
}
return work;
}
static int
fb_cmap_init(void)
{
int lp;
if (cmap == NULL)
return 1;
if (cmap->len < COLOR_OFFSET_8BIT + COLORS_8BIT) {
fprintf(stderr, "Can't allocate enough color.\n");
return 1;
}
if (cmap_org == NULL) {
if ((cmap_org =
fb_cmap_create(&fscinfo, &vscinfo)) == (struct fb_cmap *)-1) {
return 1;
}
if (fb_cmap_get(fbfp, cmap_org)) {
fprintf(stderr, "Can't get color map.\n");
fb_cmap_destroy(cmap_org);
cmap_org = NULL;
return 1;
}
}
cmap->start = MONO_OFFSET_8BIT;
cmap->len = COLORS_8BIT + COLORS_MONO_8BIT;
for (lp = 0; lp < COLORS_MONO_8BIT; lp++) {
int c;
c = (lp << (MONO_SHIFT_8BIT + 8)) +
(lp ? (0xFFFF - (MONO_MASK_8BIT << 8)) : 0);
if (cmap->red)
*(cmap->red + lp) = c;
if (cmap->green)
*(cmap->green + lp) = c;
if (cmap->blue)
*(cmap->blue + lp) = c;
}
for (lp = 0; lp < COLORS_8BIT; lp++) {
int r, g, b;
r = lp & (RED_MASK_8BIT >> RED_SHIFT_8BIT);
g = lp & (GREEN_MASK_8BIT >> GREEN_SHIFT_8BIT);
b = lp & (BLUE_MASK_8BIT >> BLUE_SHIFT_8BIT);
if (cmap->red)
*(cmap->red + lp + COLORS_MONO_8BIT)
= (r << (RED_SHIFT_8BIT + 8)) +
(r ? (0xFFFF - (RED_MASK_8BIT << 8)) : 0);
if (cmap->green)
*(cmap->green + lp + COLORS_MONO_8BIT)
= (g << (GREEN_SHIFT_8BIT + 8)) +
(g ? (0xFFFF - (GREEN_MASK_8BIT << 8)) : 0);
if (cmap->blue)
*(cmap->blue + lp + COLORS_MONO_8BIT)
= (b << (BLUE_SHIFT_8BIT + 8)) +
(b ? (0xFFFF - (BLUE_MASK_8BIT << 8)) : 0);
}
if (fb_cmap_set(fbfp, cmap)) {
fb_cmap_destroy(cmap);
cmap = NULL;
fprintf(stderr, "Can't set color map.\n");
return 1;
}
return 0;
}
/*
* (struct fb_cmap)<29>ǥХ<C7A5><D0A5><EFBFBD><EFBFBD>˰<EFBFBD>¸<EFBFBD><C2B8><EFBFBD>ʤ<EFBFBD><CAA4><EFBFBD><EFBFBD>顼<EFBFBD>ޥå׾<C3A5><D7BE><EFBFBD>
@@ -789,7 +941,6 @@ fb_cmap_destroy(struct fb_cmap *cmap)
free(cmap);
}
#if 0
static int
fb_cmap_get(int fbfp, struct fb_cmap *cmap)
{
@@ -809,7 +960,7 @@ fb_cmap_set(int fbfp, struct fb_cmap *cmap)
}
return 0;
}
#endif
/*
* <20>ե졼<D5A5><ECA1BC><EFBFBD>Хåե<C3A5><D5A5><EFBFBD><EFBFBD>Ф<EFBFBD><D0A4>륢<EFBFBD><EBA5A2><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
*