diff options
Diffstat (limited to 'raster/imageunpack.c')
| -rw-r--r-- | raster/imageunpack.c | 233 |
1 files changed, 0 insertions, 233 deletions
diff --git a/raster/imageunpack.c b/raster/imageunpack.c deleted file mode 100644 index a07d4f16..00000000 --- a/raster/imageunpack.c +++ /dev/null @@ -1,233 +0,0 @@ -#include "fitz-base.h" -#include "fitz-world.h" -#include "fitz-draw.h" - -typedef unsigned char byte; - -/* - * Apply decode parameters - */ - -static void decodetile(fz_pixmap *pix, int skip, float *decode) -{ - int min[FZ_MAXCOLORS]; - int max[FZ_MAXCOLORS]; - int sub[FZ_MAXCOLORS]; - int needed = 0; - int n = pix->n; - byte *p = pix->samples; - int wh = pix->w * pix->h; - int i; - int justinvert = 1; - - min[0] = 0; - max[0] = 255; - sub[0] = 255; - - for (i = skip; i < n; i++) - { - min[i] = decode[(i - skip) * 2] * 255; - max[i] = decode[(i - skip) * 2 + 1] * 255; - sub[i] = max[i] - min[i]; - needed |= (min[i] != 0) | (max[i] != 255); - justinvert &= min[i] == 255 && max[i] == 0 && sub[i] == -255; - } - - if (!needed) - return; - - switch (n) { - case 1: - while (wh--) - { - p[0] = min[0] + fz_mul255(sub[0], p[0]); - p ++; - } - break; - case 2: - if (justinvert) { - unsigned *wp = (unsigned *)p; - - if ((((unsigned)wp) & 3) == 0) { - int hwh = wh / 2; - wh = wh - 2 * hwh; - while(hwh--) { - unsigned in = *wp; -#if BYTE_ORDER == LITTLE_ENDIAN - unsigned out = in ^ 0xff00ff00; -#else - unsigned out = in ^ 0x00ff00ff; -#endif - *wp++ = out; - } - p = (byte *)wp; - } - if (wh--) { - p[0] = p[0]; - p[1] = 255 - p[1]; - p += 2; - } - } - else - while (wh--) - { - p[0] = min[0] + fz_mul255(sub[0], p[0]); - p[1] = min[1] + fz_mul255(sub[1], p[1]); - p += 2; - } - break; - default: - while (wh--) - { - for (i = 0; i < n; i++) - p[i] = min[i] + fz_mul255(sub[i], p[i]); - p += n; - } - } -} - -/* - * Unpack image samples and optionally pad pixels with opaque alpha - */ - -#define tbit(buf,x) ((buf[x >> 3] >> ( 7 - (x & 7) ) ) & 1 ) * 255 -#define ttwo(buf,x) ((buf[x >> 2] >> ( ( 3 - (x & 3) ) << 1 ) ) & 3 ) * 85 -#define tnib(buf,x) ((buf[x >> 1] >> ( ( 1 - (x & 1) ) << 2 ) ) & 15 ) * 17 -#define toct(buf,x) (buf[x]) - -static byte t1pad0[256][8]; -static byte t1pad1[256][16]; - -static void init1() -{ - static int inited = 0; - byte bits[1]; - int i, k, x; - - if (inited) - return; - - for (i = 0; i < 256; i++) - { - bits[0] = i; - for (k = 0; k < 8; k++) - { - x = tbit(bits, k); - t1pad0[i][k] = x; - t1pad1[i][k * 2 + 0] = 255; - t1pad1[i][k * 2 + 1] = x; - } - } - - inited = 1; -} - -static void loadtile1(byte * restrict src, int sw, byte * restrict dst, int dw, int w, int h, int pad) -{ - byte *sp; - byte *dp; - int x; - - init1(); - - if (pad == 0) - { - int w3 = w >> 3; - while (h--) - { - sp = src; - dp = dst; - for (x = 0; x < w3; x++) - { - memcpy(dp, t1pad0[*sp++], 8); - dp += 8; - } - x = x << 3; - if (x < w) - memcpy(dp, t1pad0[*sp], w - x); - src += sw; - dst += dw; - } - } - - else if (pad == 1) - { - int w3 = w >> 3; - while (h--) - { - sp = src; - dp = dst; - for (x = 0; x < w3; x++) - { - memcpy(dp, t1pad1[*sp++], 16); - dp += 16; - } - x = x << 3; - if (x < w) - memcpy(dp, t1pad1[*sp], (w - x) << 1); - src += sw; - dst += dw; - } - } - - else - { - while (h--) - { - dp = dst; - for (x = 0; x < w; x++) - { - if ((x % pad) == 0) - *dp++ = 255; - *dp++ = tbit(src, x); - } - src += sw; - dst += dw; - } - } -} - -#define TILE(getf) \ -{ \ - int x; \ - if (!pad) \ - while (h--) \ - { \ - for (x = 0; x < w; x++) \ - dst[x] = getf(src, x); \ - src += sw; \ - dst += dw; \ - } \ - else { \ - int tpad; \ - while (h--) \ - { \ - byte *dp = dst; \ - tpad = 0; \ - for (x = 0; x < w; x++) \ - { \ - if (!tpad--) { \ - tpad = pad-1; \ - *dp++ = 255; \ - } \ - *dp++ = getf(src, x); \ - } \ - src += sw; \ - dst += dw; \ - } \ - } \ -} - -static void loadtile2(byte * restrict src, int sw, byte * restrict dst, int dw, int w, int h, int pad) - TILE(ttwo) -static void loadtile4(byte * restrict src, int sw, byte * restrict dst, int dw, int w, int h, int pad) - TILE(tnib) -static void loadtile8(byte * restrict src, int sw, byte * restrict dst, int dw, int w, int h, int pad) - TILE(toct) - -void (*fz_decodetile)(fz_pixmap *pix, int skip, float *decode) = decodetile; -void (*fz_loadtile1)(byte*, int sw, byte*, int dw, int w, int h, int pad) = loadtile1; -void (*fz_loadtile2)(byte*, int sw, byte*, int dw, int w, int h, int pad) = loadtile2; -void (*fz_loadtile4)(byte*, int sw, byte*, int dw, int w, int h, int pad) = loadtile4; -void (*fz_loadtile8)(byte*, int sw, byte*, int dw, int w, int h, int pad) = loadtile8; - |