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c_sixel.c
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c_sixel.c
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/* -*- c-basic-offset:2; tab-width:2; indent-tabs-mode:nil -*- */
#include <string.h> /* memcpy */
#include <sys/stat.h> /* fstat */
#include <pobl/bl_util.h> /* BL_MIN */
#include <pobl/bl_mem.h> /* alloca */
/*
* The size of the base palettes.
* SIXEL_PALETTE_SIZE should be less than 1024.
* (See the block of if ((color = params[0]) >= SIXEL_PALETTE_SIZE))
*/
#ifndef SIXEL_PALETTE_SIZE
#define SIXEL_PALETTE_SIZE 256
#endif
/*
* Support sixel graphics extension which "sayaka --ormode on" outputs.
* (See https://github.com/isaki68k/sayaka/,
* https://github.com/isaki68k/sayaka/blob/master/vala/sixel.native.c#L113)
*/
#if 1
#define SIXEL_ORMODE
#endif
#ifdef SIXEL_1BPP
#define correct_height correct_height_1bpp
#define load_sixel_from_data load_sixel_from_data_1bpp
#define SIXEL_RGB100(r, g, b) ((9 * (r) * (r) + 30 * (g) * (g) + (b) * (b) > \
9 * 50 * 50 + 30 * 50 * 50 + 50 * 50) ? 1 : 0)
#define SIXEL_RGB255(r, g, b) ((9 * (r) * (r) + 30 * (g) * (g) + (b) * (b) > \
9 * 127 * 127 + 30 * 127 * 127 + 127 * 127) ? 1 : 0)
#define CARD_HEAD_SIZE 0
#define pixel_t u_int8_t
#elif defined(SIXEL_SHAREPALETTE) /* Both sixel and system uses same palette (works on fb alone) */
#define correct_height correct_height_sharepalette
#define load_sixel_from_data load_sixel_from_data_sharepalette
#define CARD_HEAD_SIZE 0
#ifdef USE_GRF
#define pixel_t u_int16_t
#else
#define pixel_t u_int8_t
#endif
#else
#define SIXEL_RGB100(r, g, b) ((((r)*255 / 100) << 16) | (((g)*255 / 100) << 8) | ((b)*255 / 100))
#ifndef CARD_HEAD_SIZE
#ifdef GDK_PIXBUF_VERSION
#define CARD_HEAD_SIZE 0
#else
#define CARD_HEAD_SIZE 8
#endif
#endif /* CARD_HEAD_SIZE */
#define pixel_t u_int32_t
#endif /* SIXEL_1BPP */
#define PIXEL_SIZE sizeof(pixel_t)
/* --- static variables --- */
#if !defined(SIXEL_1BPP) && !defined(SIXEL_SHAREPALETTE)
static pixel_t *custom_palette;
#endif
/* --- static functions --- */
#ifndef __GET_PARAMS__
#define __GET_PARAMS__
static u_int get_params(int *params, u_int max_params, const char **p) {
u_int count;
const char *start;
memset(params, 0, sizeof(int) * max_params);
for (start = *p, count = 0; count < max_params; count++) {
while (1) {
if ('0' <= **p && **p <= '9') {
params[count] = params[count] * 10 + (**p - '0');
} else if (**p == ';') {
(*p)++;
break;
} else {
if (start == *p) {
return 0;
} else {
(*p)--;
return count + 1;
}
}
(*p)++;
}
}
(*p)--;
return count;
}
#endif /* __GET_PARAMS__ */
#ifndef __READ_SIXEL_FILE__
#define __READ_SIXEL_FILE__
static char *read_sixel_file(const char *path) {
FILE* fp;
struct stat st;
char * data;
size_t len;
if (!(fp = fopen(path, "r"))) {
#ifdef DEBUG
bl_debug_printf(BL_DEBUG_TAG " failed to open %s\n.", path);
#endif
return NULL;
}
fstat(fileno(fp), &st);
/*
* - malloc() should be used here because alloca() could return insufficient
* memory.
* - Cast to char* is necessary because this function can be compiled by g++.
*/
if (!(data = (char*)malloc(st.st_size + 1))) {
fclose(fp);
return NULL;
}
len = fread(data, 1, st.st_size, fp);
fclose(fp);
data[len] = '\0';
return data;
}
#endif
#ifndef __REALLOC_PIXELS_INTERN__
#define __REALLOC_PIXELS_INTERN__
static int realloc_pixels_intern(u_char **pixels, size_t new_stride, int new_height,
size_t cur_stride, int cur_height, int n_copy_rows) {
u_char *p;
u_char *src;
u_char *dst;
int y;
if (new_stride < cur_stride) {
if (new_height > cur_height) {
/* Not supported */
#ifdef DEBUG
bl_error_printf(BL_DEBUG_TAG
" Sixel width bytes is shrunk (%d->%d) but height is lengthen (%d->%d)\n",
cur_stride, new_stride, cur_height, new_height);
#endif
return 0;
} else /* if (new_height < cur_height) */ {
#ifdef DEBUG
bl_debug_printf(BL_DEBUG_TAG
" Sixel data: %d bytes %d rows -> shrink %d bytes %d rows (No alloc)\n",
cur_stride, cur_height, new_stride, new_height);
#endif
dst = src = *pixels;
for (y = 1; y < n_copy_rows; y++) {
memmove((dst += new_stride), (src += cur_stride), new_stride);
}
return 1;
}
}
/* 'new_stride == cur_stride && new_height == cur_height' is checked before calling this. */
else if (new_stride == cur_stride && new_height < cur_height) {
/* do nothing */
return 1;
}
if (new_stride > (SSIZE_MAX - CARD_HEAD_SIZE) / new_height) {
/* integer overflow */
return 0;
}
if (new_stride == cur_stride /* && new_height > cur_height */) {
#ifdef DEBUG
bl_debug_printf(BL_DEBUG_TAG " Sixel data: %d bytes %d rows -> realloc %d bytes %d rows\n",
cur_stride, cur_height, new_stride, new_height);
#endif
/* Cast to u_char* is necessary because this function can be compiled by g++. */
if ((p = (u_char*)realloc(*pixels - CARD_HEAD_SIZE,
CARD_HEAD_SIZE + new_stride * new_height))) {
p += CARD_HEAD_SIZE;
} else {
#ifdef DEBUG
bl_debug_printf(BL_DEBUG_TAG " realloc failed.\n.");
#endif
return 0;
}
memset(p + cur_stride * cur_height, 0, new_stride * (new_height - cur_height));
} else if (new_stride * new_height <= cur_stride * cur_height) {
/* cur_stride < new_stride, but cur_height > new_height */
#ifdef DEBUG
bl_debug_printf(BL_DEBUG_TAG
" Sixel data: %d bytes %d rows -> %d bytes %d rows (No alloc)\n",
cur_stride, cur_height, new_stride, new_height);
#endif
src = (*pixels) + n_copy_rows * cur_stride;
dst = (*pixels) + n_copy_rows * new_stride;
y = 1;
while (1) {
memset((dst -= new_stride) + cur_stride, 0, new_stride - cur_stride);
if (y++ >= n_copy_rows) {
break;
}
memmove(dst, (src -= cur_stride), cur_stride);
}
return 1;
} else {
#ifdef DEBUG
bl_debug_printf(BL_DEBUG_TAG " Sixel data: %d bytes %d rows -> calloc %d bytes %d rows\n",
cur_stride, cur_height, new_stride, new_height);
#endif
/* Cast to u_char* is necessary because this function can be compiled by g++. */
if ((p = (u_char*)calloc(CARD_HEAD_SIZE + new_stride * new_height, 1))) {
p += CARD_HEAD_SIZE;
} else {
#ifdef DEBUG
bl_debug_printf(BL_DEBUG_TAG " calloc failed.\n.");
#endif
return 0;
}
for (y = 0; y < n_copy_rows; y++) {
memcpy(p + (y * new_stride), (*pixels) + (y * cur_stride), cur_stride);
}
if (*pixels) {
free((*pixels) - CARD_HEAD_SIZE);
}
}
*pixels = p;
return 1;
}
#endif
/* realloc_pixels() might not be inlined because it is called twice. */
#define realloc_pixels(pixels, new_width, new_height, cur_width, cur_height, n_copy_rows) \
((new_width) == (cur_width) && (new_height) == (cur_height) ? \
1 : realloc_pixels_intern(pixels, new_width * PIXEL_SIZE, new_height, \
cur_width * PIXEL_SIZE, cur_height, n_copy_rows))
/*
* Correct the height which is always multiple of 6, but this doesn't
* necessarily work.
*/
static void correct_height(pixel_t *pixels, int width, int *height /* multiple of 6 */) {
int x;
int y;
pixels += (width * (*height - 1));
for (y = 0; y < 5; y++) {
for (x = 0; x < width; x++) {
if (pixels[x]) {
return;
}
}
(*height)--;
pixels -= width;
}
}
/*
* load_sixel_from_file() returns at least 1024*1024 pixels memory even if
* the actual image size is less than it.
* It is the caller that should shrink (realloc) it.
*/
static u_char *load_sixel_from_data(const char *file_data, u_int *width_ret, u_int *height_ret,
int *transparent) {
const char *p = file_data;
u_char *pixels;
int params[6];
u_int n; /* number of params */
int init_width;
int pix_x;
int pix_y;
int stride;
int cur_width;
int cur_height;
int width;
int height;
int rep;
int color;
int asp_x;
#ifdef SIXEL_ORMODE
int ormode = 0;
#endif
#ifdef SIXEL_SHAREPALETTE
u_int8_t color_indexes[] =
{ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79,
80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95,
96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111,
112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127,
128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143,
144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159,
160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175,
176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191,
192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207,
208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223,
224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239,
240, 241, 242, 243, 244, 245, 246, 247, 248, 249, 250, 251, 252, 253, 254, 255 };
#else
/* VT340 Default Color Map */
static pixel_t default_palette[] = {
SIXEL_RGB100(0, 0, 0), /* BLACK */
SIXEL_RGB100(20, 20, 80), /* BLUE */
SIXEL_RGB100(80, 13, 13), /* RED */
SIXEL_RGB100(20, 80, 20), /* GREEN */
SIXEL_RGB100(80, 20, 80), /* MAGENTA */
SIXEL_RGB100(20, 80, 80), /* CYAN */
SIXEL_RGB100(80, 80, 20), /* YELLOW */
SIXEL_RGB100(53, 53, 53), /* GRAY 50% */
SIXEL_RGB100(26, 26, 26), /* GRAY 25% */
SIXEL_RGB100(33, 33, 60), /* BLUE* */
SIXEL_RGB100(60, 26, 26), /* RED* */
SIXEL_RGB100(33, 60, 33), /* GREEN* */
SIXEL_RGB100(60, 33, 60), /* MAGENTA* */
SIXEL_RGB100(33, 60, 60), /* CYAN* */
SIXEL_RGB100(60, 60, 33), /* YELLOW* */
SIXEL_RGB100(80, 80, 80) /* GRAY 75% */
};
pixel_t *palette;
pixel_t *base_palette;
pixel_t *ext_palette = NULL;
#endif
pixels = NULL;
init_width = 0;
cur_width = cur_height = width = height = 0;
#ifndef SIXEL_SHAREPALETTE
#ifndef SIXEL_1BPP
if (custom_palette) {
base_palette = palette = custom_palette;
if (palette[SIXEL_PALETTE_SIZE] == 0) /* No active palette */ {
memcpy(palette, default_palette, sizeof(default_palette));
memset(palette + 16, 0, sizeof(pixel_t) * SIXEL_PALETTE_SIZE - sizeof(default_palette));
}
} else
#endif
{
base_palette = palette = (pixel_t*)alloca(sizeof(pixel_t) * SIXEL_PALETTE_SIZE);
memcpy(palette, default_palette, sizeof(default_palette));
memset(palette + 16, 0, sizeof(pixel_t) * SIXEL_PALETTE_SIZE - sizeof(default_palette));
}
#endif
/* Place here this in case 'goto end' or 'goto body'. */
if (transparent) {
*transparent = 0; /* can be changed in processing P2. */
}
restart:
while (1) {
if (*p == '\0') {
#ifdef DEBUG
bl_debug_printf(BL_DEBUG_TAG " Illegal format\n.");
#endif
goto end;
} else if (*p == '\x90') {
break;
} else if (*p == '\x1b') {
if (*(++p) == 'P') {
break;
}
} else {
p++;
}
}
if (*(++p) != ';') {
/* P1 */
switch (*p) {
case 'q':
/* The default value. (2:1 is documented though) */
asp_x = 1;
#if 0
asp_y = 1;
#endif
goto body;
#if 0
case '0':
case '1':
case '5':
case '6':
asp_x = 1;
asp_y = 2;
break;
case '2':
asp_x = 1;
asp_y = 5;
break;
case '3':
case '4':
asp_x = 1;
asp_y = 3;
break;
case '7':
case '8':
case '9':
asp_x = 1;
asp_y = 1;
break;
default:
#ifdef DEBUG
bl_debug_printf(BL_DEBUG_TAG " Illegal format.\n.");
#endif
goto end;
#else
case '\0':
#ifdef DEBUG
bl_debug_printf(BL_DEBUG_TAG " Illegal format.\n.");
#endif
goto end;
default:
asp_x = 1; /* XXX */
#endif
}
if (p[1] == ';') {
p++;
}
} else {
/* P1 is omitted. */
asp_x = 1; /* V:H=2:1 */
#if 0
asp_y = 2;
#endif
}
if (*(++p) != ';') {
/* P2 */
switch (*p) {
case 'q':
goto body;
#ifdef SIXEL_ORMODE
case '5':
ormode = 1;
break;
#endif
case '1':
if (transparent) {
*transparent = 1;
}
break;
case '\0':
#ifdef DEBUG
bl_debug_printf(BL_DEBUG_TAG " Illegal format.\n.");
#endif
goto end;
#if 0
case '0':
case '2':
#endif
default:
#ifdef DEBUG
bl_debug_printf(BL_DEBUG_TAG " Illegal format.\n.");
#endif
break;
}
if (p[1] == ';') {
p++;
}
}
#if 0
else {
/* P2 is omitted. */
}
#endif
/* Ignoring P3 */
while (*(++p) != 'q') {
if (*p == '\0') {
#ifdef DEBUG
bl_debug_printf(BL_DEBUG_TAG " Illegal format.\n.");
#endif
goto end;
}
}
body:
#ifdef SIXEL_SHAREPALETTE
{
char *p2;
/* 'p + 2' is to skip '#' of "#0;9;%d;%d;%d" appended just after "DCS ... q" in vt_parser.c */
if (!(p2 = memchr(p + 2, '#', 50)) || (p2[2] != ';' && p2[3] != ';' && p2[4] != ';')) {
/* If color definition is not found, load_sixel_from_data_sharepalette() exits. */
goto error;
}
}
#endif
rep = asp_x; /* always >= 1 */
pix_x = pix_y = 0;
stride = width * PIXEL_SIZE;
color = 0;
while (*(++p) != '\0') {
if (*p >= '?' && *p <= '\x7E') {
u_int new_width;
u_int new_height;
int a;
int b;
int y;
u_char *line;
if (height < pix_y + 6) {
new_height = height + 516 /* 6*86 */;
} else {
new_height = height;
}
if (width < pix_x + rep) {
u_int expand = BL_MAX(rep, 512);
u_int h;
new_width = width + expand;
stride += (expand * PIXEL_SIZE);
h = width * height / new_width;
/*
* h=17, pix_y=6
* h=17/6*6=12 == pix_y + 6
*/
if (h >= pix_y + 11) {
h = h / 6 * 6;
new_height = h;
}
} else {
new_width = width;
}
if (!realloc_pixels(&pixels, new_width, new_height, width, height, pix_y + 6)) {
break;
}
width = new_width;
height = new_height;
b = *p - '?';
a = 0x01;
line = pixels + pix_y * stride + pix_x * PIXEL_SIZE;
#ifdef SIXEL_ORMODE
if (ormode) {
for (y = 0; y < 6; y++) {
if ((b & a) != 0) {
int x = 0;
do {
((pixel_t*)line)[x++] |= color;
} while (x < rep); /* rep >= 1 */
}
a <<= 1;
line += stride;
}
} else
#endif
{
#ifdef SIXEL_SHAREPALETTE
for (y = 0; y < 6; y++) {
if ((b & a) != 0) {
#ifdef USE_GRF
int x = 0;
do {
((u_int16_t*)line)[x++] = color_indexes[color];
} while (x < rep); /* rep >= 1 */
#else
memset(line, color_indexes[color], rep);
#endif
}
a <<= 1;
line += stride;
}
#else
for (y = 0; y < 6; y++) {
if ((b & a) != 0) {
int x = 0;
do {
#ifdef SIXEL_1BPP
/* 0x80 is opaque mark */
((pixel_t*)line)[x++] = 0x80 | palette[color];
#else
((pixel_t*)line)[x++] = palette[color];
#endif
} while (x < rep); /* rep >= 1 */
}
a <<= 1;
line += stride;
}
#endif /* SIXEL_SHAREPALETTE */
}
pix_x += rep;
if (cur_width < pix_x) {
cur_width = pix_x;
}
if (cur_height < pix_y + 6) {
cur_height = pix_y + 6;
}
rep = asp_x; /* always >= 1 */
} else if (*p == '!') {
/* ! Pn Ch */
if (*(++p) == '\0') {
#ifdef DEBUG
bl_debug_printf(BL_DEBUG_TAG " Illegal format.\n.");
#endif
break;
}
if (get_params(params, 1, &p) > 0) {
if ((rep = params[0]) < 1) {
rep = 1;
}
rep *= asp_x;
}
} else if (*p == '$' || *p == '-') {
pix_x = 0;
rep = asp_x; /* always >= 1 */
if (*p == '-') {
if (!init_width && width > cur_width && cur_width > 0) {
int y;
#ifdef DEBUG
bl_debug_printf("Sixel width is shrunk (%d -> %d)\n", width, cur_width);
#endif
for (y = 1; y < cur_height; y++) {
memmove(pixels + y * cur_width * PIXEL_SIZE, pixels + y * width * PIXEL_SIZE,
cur_width * PIXEL_SIZE);
}
memset(pixels + y * cur_width * PIXEL_SIZE, 0,
(cur_height * (width - cur_width) * PIXEL_SIZE));
width = cur_width;
stride = width * PIXEL_SIZE;
init_width = 1;
}
pix_y += 6;
}
} else if (*p == '#') /* # Pc ; Pu; Px; Py; Pz */ {
if (*(++p) == '\0') {
#ifdef DEBUG
bl_debug_printf(BL_DEBUG_TAG " Illegal format.\n.");
#endif
break;
}
n = get_params(params, BL_ARRAY_SIZE(params), &p);
if (n > 0) {
if ((color = params[0]) >= SIXEL_PALETTE_SIZE) {
#ifdef SIXEL_SHAREPALETTE
color = SIXEL_PALETTE_SIZE - 1;
#else
if (color >= 1024) {
color = 0;
goto use_base_palette;
} else {
color -= SIXEL_PALETTE_SIZE;
if (!ext_palette) {
if (!(ext_palette = (pixel_t*)alloca(sizeof(pixel_t) *
(1024 - SIXEL_PALETTE_SIZE)))) {
color = 0;
goto use_base_palette;
}
memset(ext_palette, 0, 1024 - SIXEL_PALETTE_SIZE);
}
palette = ext_palette;
}
#endif
} else {
if (color < 0) {
color = 0;
}
#ifndef SIXEL_SHAREPALETTE
use_base_palette:
palette = base_palette;
#endif
}
}
if (n > 4) {
int rgba[4]; /* The arguments of bl_hls_to_rgb() are 'int*' */
rgba[3] = 255;
if (params[1] == 1) {
/* HLS */
bl_hls_to_rgb(&rgba[0], &rgba[1], &rgba[2],
BL_MIN(params[2], 360), BL_MIN(params[3], 100), BL_MIN(params[4], 100));
if (n > 5 && params[5] < 100) {
rgba[3] = params[5] * 255 / 100;
}
} else if (params[1] == 2
#ifndef SIXEL_SHAREPALETTE
|| params[1] == 9 /* see vt_parser.c */
#endif
) {
/* RGB */
rgba[0] = params[2] >= 100 ? 255 : params[2] * 255 / 100;
rgba[1] = params[3] >= 100 ? 255 : params[3] * 255 / 100;
rgba[2] = params[4] >= 100 ? 255 : params[4] * 255 / 100;
if (n > 5 && params[5] < 100) {
rgba[3] = params[5] * 255 / 100;
}
} else if (params[1] == 3) {
/* R8G8B8 */
rgba[0] = params[2] >= 255 ? 255 : params[2];
rgba[1] = params[3] >= 255 ? 255 : params[3];
rgba[2] = params[4] >= 255 ? 255 : params[4];
if (n > 5 && params[5] < 255) {
rgba[3] = params[5];
}
} else {
continue;
}
#if defined(SIXEL_1BPP)
palette[color] = SIXEL_RGB255(rgba[0], rgba[1], rgba[2]);
#elif defined(SIXEL_SHAREPALETTE)
{
u_int8_t r, g, b;
/* fb/ui_display.h which defines ui_cmap_get_pixel_rgb() is included from ui_imagelib.c */
if (!ui_cmap_get_pixel_rgb(&r, &g, &b, color) ||
abs(r - rgba[0]) >= 0x10 || abs(g - rgba[1]) >= 0x10 || abs(b - rgba[2]) >= 0x10) {
u_long closest;
/*
* fb/ui_display.h which defines ui_cmap_get_closest_color() is included
* from ui_imagelib.c
*/
if (ui_cmap_get_closest_color(&closest, rgba[0], rgba[1], rgba[2])) {
color_indexes[color] = closest;
} else {
goto error;
}
}
}
#else
#if defined(GDK_PIXBUF_VERSION) || defined(USE_QUARTZ)
/* RGBA */
((u_char*)(palette + color))[0] = rgba[0];
((u_char*)(palette + color))[1] = rgba[1];
((u_char*)(palette + color))[2] = rgba[2];
((u_char*)(palette + color))[3] = rgba[3];
#else
/* ARGB */
palette[color] = (rgba[3] << 24) | (rgba[0] << 16) | (rgba[1] << 8) | rgba[2];
#endif
if (palette == custom_palette && palette[SIXEL_PALETTE_SIZE] <= color) {
/*
* Set max active palette number for NetBSD/OpenBSD.
* (See load_file() in fb/ui_imagelib.c)
*/
palette[SIXEL_PALETTE_SIZE] = color + 1;
}
#endif
#ifdef __DEBUG
bl_debug_printf(BL_DEBUG_TAG " Set rgb %x for color %d.\n", palette[color], color);
#endif
}
} else if (*p == '"') /* " Pan ; Pad ; Ph ; Pv */ {
u_int new_width = 0;
u_int new_height = 0;
int need_resize = 0;
if (*(++p) == '\0') {
#ifdef DEBUG
bl_debug_printf(BL_DEBUG_TAG " Illegal format.\n.");
#endif
break;
}
if ((n = get_params(params, 4, &p)) == 1) {
params[1] = 1;
n = 2;
}
switch (n) {
case 4:
new_height = (params[3] + 5) / 6 * 6;
case 3:
new_width = params[2];
#if 0
case 2:
/* V:H=params[0]:params[1] */
#if 0
asp_x = params[1];
asp_y = params[0];
#else
rep /= asp_x;
if ((asp_x = params[1] / params[0]) == 0) {
asp_x = 1; /* XXX */
}
rep *= asp_x;
#endif
#endif
}
if (width < new_width) {
/* w200 h100 -> w400 h0 case is ignored. */
if (new_height > 0) {
need_resize = 1;
if (height > new_height) {
new_height = height;
}
}
}
if (height < new_height) {
/* w200 h100 -> w0 h200 case is ignored. */
if (new_width > 0) {
need_resize = 1;
if (width > new_width) {
new_width = width;
}
}
}
if (need_resize &&
realloc_pixels(&pixels, new_width, new_height, width, height, pix_y + 6)) {
width = new_width;
stride = new_width * PIXEL_SIZE;
height = new_height;
}
} else if (*p == '\x1b') {
if (*(++p) == '\\') {
#ifdef DEBUG
bl_debug_printf(BL_DEBUG_TAG " EOF.\n.");
#endif
/* See is_separated_sixel() in vt_parser.c */
if (*(p + 1) != '\0') {
goto restart;
}
break;
} else if (*p == '\0') {
break;
}
} else if (*p == '\x9c') {
#ifdef DEBUG
bl_debug_printf(BL_DEBUG_TAG " EOF.\n.");
#endif
/* See is_separated_sixel() in vt_parser.c */
if (*(p + 1) != '\0') {
goto restart;
}
break;
}
}
end:
#if !defined(SIXEL_1BPP) && !defined(SIXEL_SHAREPALETTE)
custom_palette = NULL;
#endif
if (cur_width > 0 && realloc_pixels(&pixels, cur_width, cur_height, width, height, cur_height)) {
correct_height((pixel_t*)pixels, cur_width, &cur_height);
#ifdef DEBUG
bl_debug_printf("Shrink size w %d h %d -> w %d h %d\n", width, height, cur_width, cur_height);
#endif
#ifdef SIXEL_ORMODE
if (ormode) {
int x, y;
pixel_t *p = (pixel_t*)pixels;
for (y = 0; y < cur_height; y++) {
for (x = 0; x < cur_width; x++) {
#if defined(SIXEL_SHAREPALETTE)
*p = color_indexes[*p];
#elif defined(SIXEL_1BPP)
/* 0x80 is opaque mark */
*p = 0x80 | palette[*p];
#else
*p = palette[*p];
#endif
p++;
}
}
}
#endif
*width_ret = cur_width;
*height_ret = cur_height;
return pixels;
}
#ifdef DEBUG
bl_debug_printf(BL_DEBUG_TAG " Nothing is drawn.\n");
#endif
#ifdef SIXEL_SHAREPALETTE
error:
#endif
if (pixels) {
free(pixels - CARD_HEAD_SIZE);
}
return NULL;
}
#if !defined(SIXEL_1BPP) && !defined(SIXEL_SHAREPALETTE)
static u_char *load_sixel_from_file(const char *path, u_int *width_ret, u_int *height_ret,
int *transparent) {
char *file_data;
u_char *pixels;
if ((file_data = read_sixel_file(path))) {
pixels = load_sixel_from_data(file_data, width_ret, height_ret, transparent);
free(file_data);
return pixels;
} else {
return NULL;
}
}
pixel_t *ui_set_custom_sixel_palette(pixel_t *palette /* NULL -> Create new palette */
) {
if (!palette) {
palette = (pixel_t*)calloc(sizeof(pixel_t), SIXEL_PALETTE_SIZE + 1);
}
return (custom_palette = palette);
}
#endif
#if defined(BL_DEBUG) && !defined(TEST_SIXEL)