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|
#include "mupdf/fitz.h"
#include <assert.h>
#include <limits.h>
#include <string.h>
#include <math.h>
fz_pixmap *
fz_keep_pixmap(fz_context *ctx, fz_pixmap *pix)
{
return fz_keep_storable(ctx, &pix->storable);
}
void
fz_drop_pixmap(fz_context *ctx, fz_pixmap *pix)
{
fz_drop_storable(ctx, &pix->storable);
}
void
fz_drop_pixmap_imp(fz_context *ctx, fz_storable *pix_)
{
fz_pixmap *pix = (fz_pixmap *)pix_;
fz_drop_colorspace(ctx, pix->colorspace);
fz_drop_separations(ctx, pix->seps);
if (pix->flags & FZ_PIXMAP_FLAG_FREE_SAMPLES)
fz_free(ctx, pix->samples);
fz_drop_pixmap(ctx, pix->underlying);
fz_free(ctx, pix);
}
fz_pixmap *
fz_new_pixmap_with_data(fz_context *ctx, fz_colorspace *colorspace, int w, int h, fz_separations *seps, int alpha, int stride, unsigned char *samples)
{
fz_pixmap *pix;
int s = fz_count_active_separations(ctx, seps);
int n;
if (w < 0 || h < 0)
fz_throw(ctx, FZ_ERROR_GENERIC, "Illegal dimensions for pixmap %d %d", w, h);
n = alpha + s + fz_colorspace_n(ctx, colorspace);
if (stride < n*w && stride > -n*w)
fz_throw(ctx, FZ_ERROR_GENERIC, "Illegal stride for pixmap (n=%d w=%d, stride=%d)", n, w, stride);
if (samples == NULL && stride < n*w)
fz_throw(ctx, FZ_ERROR_GENERIC, "Illegal -ve stride for pixmap without data");
pix = fz_malloc_struct(ctx, fz_pixmap);
FZ_INIT_STORABLE(pix, 1, fz_drop_pixmap_imp);
pix->x = 0;
pix->y = 0;
pix->w = w;
pix->h = h;
pix->alpha = alpha = !!alpha;
pix->flags = FZ_PIXMAP_FLAG_INTERPOLATE;
pix->xres = 96;
pix->yres = 96;
pix->colorspace = NULL;
pix->n = n;
pix->s = s;
pix->seps = fz_keep_separations(ctx, seps);
pix->stride = stride;
if (colorspace)
{
pix->colorspace = fz_keep_colorspace(ctx, colorspace);
}
else
{
assert(alpha || s);
}
pix->samples = samples;
if (!samples)
{
fz_try(ctx)
{
if (pix->stride - 1 > INT_MAX / pix->n)
fz_throw(ctx, FZ_ERROR_GENERIC, "overly wide image");
pix->samples = fz_malloc_array(ctx, pix->h, pix->stride);
}
fz_catch(ctx)
{
fz_drop_colorspace(ctx, colorspace);
fz_free(ctx, pix);
fz_rethrow(ctx);
}
pix->flags |= FZ_PIXMAP_FLAG_FREE_SAMPLES;
}
return pix;
}
fz_pixmap *
fz_new_pixmap(fz_context *ctx, fz_colorspace *colorspace, int w, int h, fz_separations *seps, int alpha)
{
int stride;
int s = fz_count_active_separations(ctx, seps);
if (!colorspace && s == 0) alpha = 1;
stride = (fz_colorspace_n(ctx, colorspace) + s + alpha) * w;
return fz_new_pixmap_with_data(ctx, colorspace, w, h, seps, alpha, stride, NULL);
}
fz_pixmap *
fz_new_pixmap_with_bbox(fz_context *ctx, fz_colorspace *colorspace, const fz_irect *r, fz_separations *seps, int alpha)
{
fz_pixmap *pixmap;
pixmap = fz_new_pixmap(ctx, colorspace, r->x1 - r->x0, r->y1 - r->y0, seps, alpha);
pixmap->x = r->x0;
pixmap->y = r->y0;
return pixmap;
}
fz_pixmap *
fz_new_pixmap_with_bbox_and_data(fz_context *ctx, fz_colorspace *colorspace, const fz_irect *r, fz_separations *seps, int alpha, unsigned char *samples)
{
int w = r->x1 - r->x0;
int stride;
int s = fz_count_active_separations(ctx, seps);
fz_pixmap *pixmap;
if (!colorspace && s == 0) alpha = 1;
stride = (fz_colorspace_n(ctx, colorspace) + s + alpha) * w;
pixmap = fz_new_pixmap_with_data(ctx, colorspace, w, r->y1 - r->y0, seps, alpha, stride, samples);
pixmap->x = r->x0;
pixmap->y = r->y0;
return pixmap;
}
fz_pixmap *fz_new_pixmap_from_pixmap(fz_context *ctx, fz_pixmap *pixmap, const fz_irect *rect)
{
fz_irect local_rect;
fz_pixmap *subpix;
if (!pixmap)
return NULL;
if (rect == NULL)
{
rect = &local_rect;
local_rect.x0 = pixmap->x;
local_rect.y0 = pixmap->y;
local_rect.x1 = pixmap->x + pixmap->w;
local_rect.y1 = pixmap->y + pixmap->h;
}
else if (rect->x0 < pixmap->x || rect->y0 < pixmap->y || rect->x1 > pixmap->x + pixmap->w || rect->y1 > pixmap->y + pixmap->h)
fz_throw(ctx, FZ_ERROR_GENERIC, "Pixmap region is not a subarea");
subpix = fz_malloc_struct(ctx, fz_pixmap);
*subpix = *pixmap;
subpix->storable.refs = 1;
subpix->x = rect->x0;
subpix->y = rect->y0;
subpix->w = rect->x1 - rect->x0;
subpix->h = rect->y1 - rect->y0;
subpix->samples += (rect->x0 - pixmap->x) + (rect->y0 - pixmap->y) * pixmap->stride;
subpix->underlying = fz_keep_pixmap(ctx, pixmap);
subpix->colorspace = fz_keep_colorspace(ctx, pixmap->colorspace);
subpix->seps = fz_keep_separations(ctx, pixmap->seps);
subpix->flags &= ~FZ_PIXMAP_FLAG_FREE_SAMPLES;
return subpix;
}
fz_irect *
fz_pixmap_bbox(fz_context *ctx, const fz_pixmap *pix, fz_irect *bbox)
{
bbox->x0 = pix->x;
bbox->y0 = pix->y;
bbox->x1 = pix->x + pix->w;
bbox->y1 = pix->y + pix->h;
return bbox;
}
fz_irect *
fz_pixmap_bbox_no_ctx(const fz_pixmap *pix, fz_irect *bbox)
{
bbox->x0 = pix->x;
bbox->y0 = pix->y;
bbox->x1 = pix->x + pix->w;
bbox->y1 = pix->y + pix->h;
return bbox;
}
fz_colorspace *
fz_pixmap_colorspace(fz_context *ctx, fz_pixmap *pix)
{
if (!pix)
return NULL;
return pix->colorspace;
}
int
fz_pixmap_x(fz_context *ctx, fz_pixmap *pix)
{
return pix->x;
}
int
fz_pixmap_y(fz_context *ctx, fz_pixmap *pix)
{
return pix->y;
}
int
fz_pixmap_width(fz_context *ctx, fz_pixmap *pix)
{
return pix->w;
}
int
fz_pixmap_height(fz_context *ctx, fz_pixmap *pix)
{
return pix->h;
}
int
fz_pixmap_components(fz_context *ctx, fz_pixmap *pix)
{
return pix->n;
}
int
fz_pixmap_colorants(fz_context *ctx, fz_pixmap *pix)
{
return pix->n - pix->alpha - pix->s;
}
int
fz_pixmap_spots(fz_context *ctx, fz_pixmap *pix)
{
return pix->s;
}
int
fz_pixmap_alpha(fz_context *ctx, fz_pixmap *pix)
{
return pix->alpha;
}
int
fz_pixmap_stride(fz_context *ctx, fz_pixmap *pix)
{
return pix->stride;
}
unsigned char *
fz_pixmap_samples(fz_context *ctx, fz_pixmap *pix)
{
if (!pix)
return NULL;
return pix->samples;
}
/*
The slowest routine in most CMYK rendering profiles.
We therefore spend some effort to improve it. Rather than
writing bytes, we write uint32_t's.
*/
#ifdef ARCH_ARM
static void
clear_cmyka_bitmap_ARM(uint32_t *samples, int c, int value)
__attribute__((naked));
static void
clear_cmyka_bitmap_ARM(uint32_t *samples, int c, int value)
{
asm volatile(
ENTER_ARM
"stmfd r13!,{r4-r6,r14} \n"
"@ r0 = samples \n"
"@ r1 = c \n"
"@ r2 = value \n"
"mov r3, #255 \n"
"mov r12,#0 @ r12= 0 \n"
"subs r1, r1, #3 \n"
"ble 2f \n"
"str r12,[r13,#-20]! \n"
"str r12,[r13,#4] \n"
"str r12,[r13,#8] \n"
"str r12,[r13,#12] \n"
"str r12,[r13,#16] \n"
"strb r2, [r13,#3] \n"
"strb r3, [r13,#4] \n"
"strb r2, [r13,#8] \n"
"strb r3, [r13,#9] \n"
"strb r2, [r13,#13] \n"
"strb r3, [r13,#14] \n"
"strb r2, [r13,#18] \n"
"strb r3, [r13,#19] \n"
"ldmfd r13!,{r4,r5,r6,r12,r14} \n"
"1: \n"
"stmia r0!,{r4,r5,r6,r12,r14} \n"
"subs r1, r1, #4 \n"
"bgt 1b \n"
"2: \n"
"adds r1, r1, #3 \n"
"ble 4f \n"
"3: \n"
"strb r12,[r0], #1 \n"
"strb r12,[r0], #1 \n"
"strb r12,[r0], #1 \n"
"strb r2, [r0], #1 \n"
"strb r3, [r0], #1 \n"
"subs r1, r1, #1 \n"
"bgt 3b \n"
"4: \n"
"ldmfd r13!,{r4-r6,PC} \n"
ENTER_THUMB
);
}
#endif
static void
clear_cmyk_bitmap(unsigned char *samples, int w, int h, int spots, int stride, int value, int alpha)
{
uint32_t *s = (uint32_t *)(void *)samples;
uint8_t *t;
if (w < 0 || h < 0)
return;
if (spots)
{
int x, i;
spots += 4;
stride -= w * (spots + alpha);
for (; h > 0; h--)
{
for (x = w; x > 0; x--)
{
for (i = spots; i > 0; i--)
*samples++ = value;
if (alpha)
*samples++ = 255;
}
samples += stride;
}
return;
}
if (alpha)
{
int c = w;
stride -= w*5;
if (stride == 0)
{
#ifdef ARCH_ARM
clear_cmyka_bitmap_ARM(s, c, alpha);
return;
#else
/* We can do it all fast (except for maybe a few stragglers) */
union
{
uint8_t bytes[20];
uint32_t words[5];
} d;
c *= h;
h = 1;
d.words[0] = 0;
d.words[1] = 0;
d.words[2] = 0;
d.words[3] = 0;
d.words[4] = 0;
d.bytes[3] = value;
d.bytes[4] = 255;
d.bytes[8] = value;
d.bytes[9] = 255;
d.bytes[13] = value;
d.bytes[14] = 255;
d.bytes[18] = value;
d.bytes[19] = 255;
c -= 3;
{
const uint32_t a0 = d.words[0];
const uint32_t a1 = d.words[1];
const uint32_t a2 = d.words[2];
const uint32_t a3 = d.words[3];
const uint32_t a4 = d.words[4];
while (c > 0)
{
*s++ = a0;
*s++ = a1;
*s++ = a2;
*s++ = a3;
*s++ = a4;
c -= 4;
}
}
c += 3;
#endif
}
t = (unsigned char *)s;
w = c;
while (h--)
{
c = w;
while (c > 0)
{
*t++ = 0;
*t++ = 0;
*t++ = 0;
*t++ = value;
*t++ = 255;
c--;
}
t += stride;
}
}
else
{
stride -= w*4;
if ((stride & 3) == 0)
{
size_t W = w;
if (stride == 0)
{
W *= h;
h = 1;
}
W *= 4;
if (value == 0)
{
while (h--)
{
memset(s, 0, W);
s += (stride>>2);
}
}
else
{
/* We can do it all fast */
union
{
uint8_t bytes[4];
uint32_t word;
} d;
d.word = 0;
d.bytes[3] = value;
{
const uint32_t a0 = d.word;
while (h--)
{
size_t WW = W >> 2;
while (WW--)
{
*s++ = a0;
}
s += (stride>>2);
}
}
}
}
else
{
t = (unsigned char *)s;
while (h--)
{
int c = w;
while (c > 0)
{
*t++ = 0;
*t++ = 0;
*t++ = 0;
*t++ = value;
c--;
}
t += stride;
}
}
}
}
void
fz_clear_pixmap(fz_context *ctx, fz_pixmap *pix)
{
int stride = pix->w * pix->n;
int h = pix->h;
unsigned char *s = pix->samples;
if (stride == pix->stride)
{
stride *= h;
h = 1;
}
if (pix->alpha || fz_colorspace_is_subtractive(ctx, pix->colorspace))
{
while (h--)
{
memset(s, 0, (unsigned int)stride);
s += pix->stride;
}
}
else
{
while (h--)
{
memset(s, 0xff, (unsigned int)stride);
s += pix->stride;
}
}
}
/* This function is horrible, and should be removed from the
* API and replaced with a less magic one. */
void
fz_clear_pixmap_with_value(fz_context *ctx, fz_pixmap *pix, int value)
{
unsigned char *s;
int w, h, n, stride, len;
int alpha = pix->alpha;
w = pix->w;
h = pix->h;
if (w < 0 || h < 0)
return;
/* CMYK needs special handling (and potentially any other subtractive colorspaces) */
if (fz_colorspace_n(ctx, pix->colorspace) == 4)
{
clear_cmyk_bitmap(pix->samples, w, h, pix->s, pix->stride, 255-value, pix->alpha);
return;
}
n = pix->n;
stride = pix->stride;
len = w * n;
s = pix->samples;
if (value == 255 || !alpha)
{
if (stride == len)
{
len *= h;
h = 1;
}
while (h--)
{
memset(s, value, (unsigned int)len);
s += stride;
}
}
else
{
int k, x, y;
stride -= len;
for (y = 0; y < pix->h; y++)
{
for (x = 0; x < pix->w; x++)
{
for (k = 0; k < pix->n - 1; k++)
*s++ = value;
if (alpha)
*s++ = 255;
}
s += stride;
}
}
}
void
fz_fill_pixmap_with_color(fz_context *ctx, fz_pixmap *pix, fz_colorspace *colorspace, float *color, const fz_color_params *color_params)
{
float colorfv[FZ_MAX_COLORS];
unsigned char colorbv[FZ_MAX_COLORS];
int i, n, a, s, x, y, w, h;
n = fz_colorspace_n(ctx, pix->colorspace);
a = pix->alpha;
s = pix->s;
fz_convert_color(ctx, color_params, NULL, pix->colorspace, colorfv, colorspace, color);
for (i = 0; i < n; ++i)
colorbv[i] = colorfv[i] * 255;
w = pix->w;
h = pix->h;
for (y = 0; y < h; ++y)
{
unsigned char *p = pix->samples + y * pix->stride;
for (x = 0; x < w; ++x)
{
for (i = 0; i < n; ++i)
*p++ = colorbv[i];
for (i = 0; i < s; ++i)
*p++ = 0;
if (a)
*p++ = 255;
}
}
}
void
fz_copy_pixmap_rect(fz_context *ctx, fz_pixmap *dest, fz_pixmap *src, const fz_irect *b, const fz_default_colorspaces *default_cs)
{
unsigned char *srcp;
unsigned char *destp;
int y, w, destspan, srcspan;
fz_irect local_b, bb;
local_b = *b;
fz_intersect_irect(&local_b, fz_pixmap_bbox(ctx, dest, &bb));
fz_intersect_irect(&local_b, fz_pixmap_bbox(ctx, src, &bb));
w = local_b.x1 - local_b.x0;
y = local_b.y1 - local_b.y0;
if (w <= 0 || y <= 0)
return;
srcspan = src->stride;
srcp = src->samples + (unsigned int)(srcspan * (local_b.y0 - src->y) + src->n * (local_b.x0 - src->x));
destspan = dest->stride;
destp = dest->samples + (unsigned int)(destspan * (local_b.y0 - dest->y) + dest->n * (local_b.x0 - dest->x));
if (src->n == dest->n)
{
w *= src->n;
do
{
memcpy(destp, srcp, w);
srcp += srcspan;
destp += destspan;
}
while (--y);
}
else
{
fz_pixmap_converter *pc = fz_lookup_pixmap_converter(ctx, dest->colorspace, src->colorspace);
fz_pixmap fake_src = *src;
fake_src.x = local_b.x0;
fake_src.y = local_b.y0;
fake_src.w = w;
fake_src.h = y;
fake_src.samples = srcp;
pc(ctx, dest, &fake_src, NULL, default_cs, fz_default_color_params(ctx), 0);
}
}
void
fz_clear_pixmap_rect_with_value(fz_context *ctx, fz_pixmap *dest, int value, const fz_irect *b)
{
unsigned char *destp;
int x, y, w, k, destspan;
fz_irect bb;
fz_irect local_b = *b;
fz_intersect_irect(&local_b, fz_pixmap_bbox(ctx, dest, &bb));
w = local_b.x1 - local_b.x0;
y = local_b.y1 - local_b.y0;
if (w <= 0 || y <= 0)
return;
destspan = dest->stride;
destp = dest->samples + (unsigned int)(destspan * (local_b.y0 - dest->y) + dest->n * (local_b.x0 - dest->x));
/* CMYK needs special handling (and potentially any other subtractive colorspaces) */
if (fz_colorspace_n(ctx, dest->colorspace) == 4)
{
value = 255 - value;
do
{
unsigned char *s = destp;
for (x = 0; x < w; x++)
{
*s++ = 0;
*s++ = 0;
*s++ = 0;
*s++ = value;
*s++ = 255;
}
destp += destspan;
}
while (--y);
return;
}
if (value == 255)
{
do
{
memset(destp, 255, (unsigned int)(w * dest->n));
destp += destspan;
}
while (--y);
}
else
{
do
{
unsigned char *s = destp;
for (x = 0; x < w; x++)
{
for (k = 0; k < dest->n - 1; k++)
*s++ = value;
*s++ = 255;
}
destp += destspan;
}
while (--y);
}
}
void
fz_premultiply_pixmap(fz_context *ctx, fz_pixmap *pix)
{
unsigned char *s = pix->samples;
unsigned char a;
int k, x, y;
int stride = pix->stride - pix->w * pix->n;
if (!pix->alpha)
return;
for (y = 0; y < pix->h; y++)
{
for (x = 0; x < pix->w; x++)
{
a = s[pix->n - 1];
for (k = 0; k < pix->n - 1; k++)
s[k] = fz_mul255(s[k], a);
s += pix->n;
}
s += stride;
}
}
void
fz_unmultiply_pixmap(fz_context *ctx, fz_pixmap *pix)
{
unsigned char *s = pix->samples;
int a, inva;
int k, x, y;
int stride = pix->stride - pix->w * pix->n;
if (!pix->alpha)
return;
for (y = 0; y < pix->h; y++)
{
for (x = 0; x < pix->w; x++)
{
a = s[pix->n - 1];
inva = a ? 255 * 256 / a : 0;
for (k = 0; k < pix->n - 1; k++)
s[k] = (s[k] * inva) >> 8;
s += pix->n;
}
s += stride;
}
}
fz_pixmap *
fz_alpha_from_gray(fz_context *ctx, fz_pixmap *gray)
{
fz_pixmap *alpha;
unsigned char *sp, *dp;
int w, h, sstride, dstride;
fz_irect bbox;
assert(gray->n == 1);
alpha = fz_new_pixmap_with_bbox(ctx, NULL, fz_pixmap_bbox(ctx, gray, &bbox), 0, 1);
dp = alpha->samples;
dstride = alpha->stride;
sp = gray->samples;
sstride = gray->stride;
h = gray->h;
w = gray->w;
while (h--)
{
memcpy(dp, sp, w);
sp += sstride;
dp += dstride;
}
return alpha;
}
void
fz_tint_pixmap(fz_context *ctx, fz_pixmap *pix, int r, int g, int b)
{
unsigned char *s = pix->samples;
int x, y;
if (pix->colorspace == fz_device_bgr(ctx))
{
int save = r;
r = b;
b = save;
}
else if (pix->colorspace == fz_device_gray(ctx))
{
g = (r + g + b) / 3;
}
else if (pix->colorspace != fz_device_rgb(ctx))
{
fz_throw(ctx, FZ_ERROR_GENERIC, "can only tint RGB, BGR and Gray pixmaps");
}
if (pix->n == 4)
{
assert(pix->alpha);
for (y = 0; y < pix->h; y++)
{
for (x = 0; x < pix->w; x++)
{
s[0] = fz_mul255(s[0], r);
s[1] = fz_mul255(s[1], g);
s[2] = fz_mul255(s[2], b);
s += 4;
}
s += pix->stride - pix->w * 4;
}
}
else if (pix->n == 2)
{
assert(pix->alpha);
for (y = 0; y < pix->h; y++)
{
for (x = 0; x < pix->w; x++)
{
*s = fz_mul255(*s, g);
s += 2;
}
s += pix->stride - pix->w * 2;
}
}
}
void
fz_invert_pixmap(fz_context *ctx, fz_pixmap *pix)
{
unsigned char *s = pix->samples;
int k, x, y;
int n1 = pix->n - pix->alpha;
int n = pix->n;
for (y = 0; y < pix->h; y++)
{
for (x = 0; x < pix->w; x++)
{
for (k = 0; k < n1; k++)
s[k] = 255 - s[k];
s += n;
}
s += pix->stride - pix->w * n;
}
}
void fz_invert_pixmap_rect(fz_context *ctx, fz_pixmap *image, const fz_irect *rect)
{
unsigned char *p;
int x, y, n;
int x0 = fz_clampi(rect->x0 - image->x, 0, image->w);
int x1 = fz_clampi(rect->x1 - image->x, 0, image->w);
int y0 = fz_clampi(rect->y0 - image->y, 0, image->h);
int y1 = fz_clampi(rect->y1 - image->y, 0, image->h);
for (y = y0; y < y1; y++)
{
p = image->samples + (unsigned int)((y * image->stride) + (x0 * image->n));
for (x = x0; x < x1; x++)
{
for (n = image->n; n > 1; n--, p++)
*p = 255 - *p;
p++;
}
}
}
void
fz_gamma_pixmap(fz_context *ctx, fz_pixmap *pix, float gamma)
{
unsigned char gamma_map[256];
unsigned char *s = pix->samples;
int n1 = pix->n - pix->alpha;
int n = pix->n;
int k, x, y;
for (k = 0; k < 256; k++)
gamma_map[k] = pow(k / 255.0f, gamma) * 255;
for (y = 0; y < pix->h; y++)
{
for (x = 0; x < pix->w; x++)
{
for (k = 0; k < n1; k++)
s[k] = gamma_map[s[k]];
s += n;
}
s += pix->stride - pix->w * n;
}
}
size_t
fz_pixmap_size(fz_context *ctx, fz_pixmap * pix)
{
if (pix == NULL)
return 0;
return sizeof(*pix) + pix->n * pix->w * pix->h;
}
fz_pixmap *
fz_convert_pixmap(fz_context *ctx, fz_pixmap *pix, fz_colorspace *ds, fz_colorspace *prf, fz_default_colorspaces *default_cs, const fz_color_params *color_params, int keep_alpha)
{
fz_pixmap *cvt;
if (!ds && !keep_alpha)
fz_throw(ctx, FZ_ERROR_GENERIC, "cannot both throw away and keep alpha");
if (color_params == NULL)
color_params = fz_default_color_params(ctx);
cvt = fz_new_pixmap(ctx, ds, pix->w, pix->h, pix->seps, keep_alpha && pix->alpha);
cvt->xres = pix->xres;
cvt->yres = pix->yres;
cvt->x = pix->x;
cvt->y = pix->y;
if (pix->flags & FZ_PIXMAP_FLAG_INTERPOLATE)
cvt->flags |= FZ_PIXMAP_FLAG_INTERPOLATE;
else
cvt->flags &= ~FZ_PIXMAP_FLAG_INTERPOLATE;
fz_try(ctx)
{
fz_pixmap_converter *pc = fz_lookup_pixmap_converter(ctx, ds, pix->colorspace);
pc(ctx, cvt, pix, prf, default_cs, color_params, 1);
}
fz_catch(ctx)
{
fz_drop_pixmap(ctx, cvt);
fz_rethrow(ctx);
}
return cvt;
}
fz_pixmap *
fz_new_pixmap_from_8bpp_data(fz_context *ctx, int x, int y, int w, int h, unsigned char *sp, int span)
{
fz_pixmap *pixmap = fz_new_pixmap(ctx, NULL, w, h, NULL, 1);
int stride = pixmap->stride;
unsigned char *s = pixmap->samples;
pixmap->x = x;
pixmap->y = y;
for (y = 0; y < h; y++)
{
memcpy(s, sp + y * span, w);
s += stride;
}
return pixmap;
}
fz_pixmap *
fz_new_pixmap_from_1bpp_data(fz_context *ctx, int x, int y, int w, int h, unsigned char *sp, int span)
{
fz_pixmap *pixmap = fz_new_pixmap(ctx, NULL, w, h, NULL, 1);
int stride = pixmap->stride - pixmap->w;
pixmap->x = x;
pixmap->y = y;
for (y = 0; y < h; y++)
{
unsigned char *out = pixmap->samples + y * w;
unsigned char *in = sp + y * span;
unsigned char bit = 0x80;
int ww = w;
while (ww--)
{
*out++ = (*in & bit) ? 255 : 0;
bit >>= 1;
if (bit == 0)
bit = 0x80, in++;
}
out += stride;
}
return pixmap;
}
#ifdef ARCH_ARM
static void
fz_subsample_pixmap_ARM(unsigned char *ptr, int w, int h, int f, int factor,
int n, int fwd, int back, int back2, int fwd2,
int divX, int back4, int fwd4, int fwd3,
int divY, int back5, int divXY)
__attribute__((naked));
static void
fz_subsample_pixmap_ARM(unsigned char *ptr, int w, int h, int f, int factor,
int n, int fwd, int back, int back2, int fwd2,
int divX, int back4, int fwd4, int fwd3,
int divY, int back5, int divXY)
{
asm volatile(
ENTER_ARM
"stmfd r13!,{r1,r4-r11,r14} \n"
"@STACK:r1,<9>,factor,n,fwd,back,back2,fwd2,divX,back4,fwd4,fwd3,divY,back5,divXY\n"
"@ r0 = src = ptr \n"
"@ r1 = w \n"
"@ r2 = h \n"
"@ r3 = f \n"
"mov r9, r0 @ r9 = dst = ptr \n"
"ldr r6, [r13,#4*12] @ r6 = fwd \n"
"ldr r7, [r13,#4*13] @ r7 = back \n"
"subs r2, r2, r3 @ r2 = h -= f \n"
"blt 11f @ Skip if less than a full row \n"
"1: @ for (y = h; y > 0; y--) { \n"
"ldr r1, [r13] @ r1 = w \n"
"subs r1, r1, r3 @ r1 = w -= f \n"
"blt 6f @ Skip if less than a full col \n"
"ldr r4, [r13,#4*10] @ r4 = factor \n"
"ldr r8, [r13,#4*14] @ r8 = back2 \n"
"ldr r12,[r13,#4*15] @ r12= fwd2 \n"
"2: @ for (x = w; x > 0; x--) { \n"
"ldr r5, [r13,#4*11] @ for (nn = n; nn > 0; n--) { \n"
"3: @ \n"
"mov r14,#0 @ r14= v = 0 \n"
"sub r5, r5, r3, LSL #8 @ for (xx = f; xx > 0; x--) { \n"
"4: @ \n"
"add r5, r5, r3, LSL #16 @ for (yy = f; yy > 0; y--) { \n"
"5: @ \n"
"ldrb r11,[r0], r6 @ r11= *src src += fwd \n"
"subs r5, r5, #1<<16 @ xx-- \n"
"add r14,r14,r11 @ v += r11 \n"
"bgt 5b @ } \n"
"sub r0, r0, r7 @ src -= back \n"
"adds r5, r5, #1<<8 @ yy-- \n"
"blt 4b @ } \n"
"mov r14,r14,LSR r4 @ r14 = v >>= factor \n"
"strb r14,[r9], #1 @ *d++ = r14 \n"
"sub r0, r0, r8 @ s -= back2 \n"
"subs r5, r5, #1 @ n-- \n"
"bgt 3b @ } \n"
"add r0, r0, r12 @ s += fwd2 \n"
"subs r1, r1, r3 @ x -= f \n"
"bge 2b @ } \n"
"6: @ Less than a full column left \n"
"adds r1, r1, r3 @ x += f \n"
"beq 11f @ if (x == 0) next row \n"
"@ r0 = src \n"
"@ r1 = x \n"
"@ r2 = y \n"
"@ r3 = f \n"
"@ r4 = factor \n"
"@ r6 = fwd \n"
"@ r7 = back \n"
"@STACK:r1,<9>,factor,n,fwd,back,back2,fwd2,divX,back4,fwd4,fwd3,divY,back5,divXY\n"
"ldr r5, [r13,#4*11] @ for (nn = n; nn > 0; n--) { \n"
"ldr r4, [r13,#4*16] @ r4 = divX \n"
"ldr r8, [r13,#4*17] @ r8 = back4 \n"
"ldr r12,[r13,#4*18] @ r12= fwd4 \n"
"8: @ \n"
"mov r14,#0 @ r14= v = 0 \n"
"sub r5, r5, r1, LSL #8 @ for (xx = x; xx > 0; x--) { \n"
"9: @ \n"
"add r5, r5, r3, LSL #16 @ for (yy = f; yy > 0; y--) { \n"
"10: @ \n"
"ldrb r11,[r0], r6 @ r11= *src src += fwd \n"
"subs r5, r5, #1<<16 @ xx-- \n"
"add r14,r14,r11 @ v += r11 \n"
"bgt 10b @ } \n"
"sub r0, r0, r7 @ src -= back \n"
"adds r5, r5, #1<<8 @ yy-- \n"
"blt 9b @ } \n"
"mul r14,r4, r14 @ r14= v *= divX \n"
"mov r14,r14,LSR #16 @ r14= v >>= 16 \n"
"strb r14,[r9], #1 @ *d++ = r14 \n"
"sub r0, r0, r8 @ s -= back4 \n"
"subs r5, r5, #1 @ n-- \n"
"bgt 8b @ } \n"
"add r0, r0, r12 @ s += fwd4 \n"
"11: @ \n"
"ldr r14,[r13,#4*19] @ r14 = fwd3 \n"
"subs r2, r2, r3 @ h -= f \n"
"add r0, r0, r14 @ s += fwd3 \n"
"bge 1b @ } \n"
"adds r2, r2, r3 @ h += f \n"
"beq 21f @ if no stray row, end \n"
"@ So doing one last (partial) row \n"
"@STACK:r1,<9>,factor,n,fwd,back,back2,fwd2,divX,back4,fwd4,fwd3,divY,back5,divXY\n"
"@ r0 = src = ptr \n"
"@ r1 = w \n"
"@ r2 = h \n"
"@ r3 = f \n"
"@ r4 = factor \n"
"@ r5 = n \n"
"@ r6 = fwd \n"
"12: @ for (y = h; y > 0; y--) { \n"
"ldr r1, [r13] @ r1 = w \n"
"ldr r7, [r13,#4*21] @ r7 = back5 \n"
"ldr r8, [r13,#4*14] @ r8 = back2 \n"
"subs r1, r1, r3 @ r1 = w -= f \n"
"blt 17f @ Skip if less than a full col \n"
"ldr r4, [r13,#4*20] @ r4 = divY \n"
"ldr r12,[r13,#4*15] @ r12= fwd2 \n"
"13: @ for (x = w; x > 0; x--) { \n"
"ldr r5, [r13,#4*11] @ for (nn = n; nn > 0; n--) { \n"
"14: @ \n"
"mov r14,#0 @ r14= v = 0 \n"
"sub r5, r5, r3, LSL #8 @ for (xx = f; xx > 0; x--) { \n"
"15: @ \n"
"add r5, r5, r2, LSL #16 @ for (yy = y; yy > 0; y--) { \n"
"16: @ \n"
"ldrb r11,[r0], r6 @ r11= *src src += fwd \n"
"subs r5, r5, #1<<16 @ xx-- \n"
"add r14,r14,r11 @ v += r11 \n"
"bgt 16b @ } \n"
"sub r0, r0, r7 @ src -= back5 \n"
"adds r5, r5, #1<<8 @ yy-- \n"
"blt 15b @ } \n"
"mul r14,r4, r14 @ r14 = x *= divY \n"
"mov r14,r14,LSR #16 @ r14 = v >>= 16 \n"
"strb r14,[r9], #1 @ *d++ = r14 \n"
"sub r0, r0, r8 @ s -= back2 \n"
"subs r5, r5, #1 @ n-- \n"
"bgt 14b @ } \n"
"add r0, r0, r12 @ s += fwd2 \n"
"subs r1, r1, r3 @ x -= f \n"
"bge 13b @ } \n"
"17: @ Less than a full column left \n"
"adds r1, r1, r3 @ x += f \n"
"beq 21f @ if (x == 0) end \n"
"@ r0 = src \n"
"@ r1 = x \n"
"@ r2 = y \n"
"@ r3 = f \n"
"@ r4 = factor \n"
"@ r6 = fwd \n"
"@ r7 = back5 \n"
"@ r8 = back2 \n"
"@STACK:r1,<9>,factor,n,fwd,back,back2,fwd2,divX,back4,fwd4,fwd3,divY,back5,divXY\n"
"ldr r4, [r13,#4*22] @ r4 = divXY \n"
"ldr r5, [r13,#4*11] @ for (nn = n; nn > 0; n--) { \n"
"ldr r8, [r13,#4*17] @ r8 = back4 \n"
"18: @ \n"
"mov r14,#0 @ r14= v = 0 \n"
"sub r5, r5, r1, LSL #8 @ for (xx = x; xx > 0; x--) { \n"
"19: @ \n"
"add r5, r5, r2, LSL #16 @ for (yy = y; yy > 0; y--) { \n"
"20: @ \n"
"ldrb r11,[r0],r6 @ r11= *src src += fwd \n"
"subs r5, r5, #1<<16 @ xx-- \n"
"add r14,r14,r11 @ v += r11 \n"
"bgt 20b @ } \n"
"sub r0, r0, r7 @ src -= back5 \n"
"adds r5, r5, #1<<8 @ yy-- \n"
"blt 19b @ } \n"
"mul r14,r4, r14 @ r14= v *= divX \n"
"mov r14,r14,LSR #16 @ r14= v >>= 16 \n"
"strb r14,[r9], #1 @ *d++ = r14 \n"
"sub r0, r0, r8 @ s -= back4 \n"
"subs r5, r5, #1 @ n-- \n"
"bgt 18b @ } \n"
"21: @ \n"
"ldmfd r13!,{r1,r4-r11,PC} @ pop, return to thumb \n"
ENTER_THUMB
);
}
#endif
void
fz_subsample_pixmap(fz_context *ctx, fz_pixmap *tile, int factor)
{
int dst_w, dst_h, w, h, fwd, fwd2, fwd3, back, back2, n, f;
unsigned char *s, *d;
#ifndef ARCH_ARM
int x, y, xx, yy, nn;
#endif
if (!tile)
return;
assert(tile->stride >= tile->w * tile->n);
s = d = tile->samples;
f = 1<<factor;
w = tile->w;
h = tile->h;
n = tile->n;
dst_w = (w + f-1)>>factor;
dst_h = (h + f-1)>>factor;
fwd = tile->stride;
back = f*fwd-n;
back2 = f*n-1;
fwd2 = (f-1)*n;
fwd3 = (f-1)*fwd + tile->stride - w * n;
factor *= 2;
#ifdef ARCH_ARM
{
int strayX = w%f;
int divX = (strayX ? 65536/(strayX*f) : 0);
int fwd4 = (strayX-1) * n;
int back4 = strayX*n-1;
int strayY = h%f;
int divY = (strayY ? 65536/(strayY*f) : 0);
int back5 = fwd * strayY - n;
int divXY = (strayY*strayX ? 65536/(strayX*strayY) : 0);
fz_subsample_pixmap_ARM(s, w, h, f, factor, n, fwd, back,
back2, fwd2, divX, back4, fwd4, fwd3,
divY, back5, divXY);
}
#else
for (y = h - f; y >= 0; y -= f)
{
for (x = w - f; x >= 0; x -= f)
{
for (nn = n; nn > 0; nn--)
{
int v = 0;
for (xx = f; xx > 0; xx--)
{
for (yy = f; yy > 0; yy--)
{
v += *s;
s += fwd;
}
s -= back;
}
*d++ = v >> factor;
s -= back2;
}
s += fwd2;
}
/* Do any strays */
x += f;
if (x > 0)
{
int div = x * f;
int fwd4 = (x-1) * n;
int back4 = x*n-1;
for (nn = n; nn > 0; nn--)
{
int v = 0;
for (xx = x; xx > 0; xx--)
{
for (yy = f; yy > 0; yy--)
{
v += *s;
s += fwd;
}
s -= back;
}
*d++ = v / div;
s -= back4;
}
s += fwd4;
}
s += fwd3;
}
/* Do any stray line */
y += f;
if (y > 0)
{
int div = y * f;
int back5 = fwd * y - n;
for (x = w - f; x >= 0; x -= f)
{
for (nn = n; nn > 0; nn--)
{
int v = 0;
for (xx = f; xx > 0; xx--)
{
for (yy = y; yy > 0; yy--)
{
v += *s;
s += fwd;
}
s -= back5;
}
*d++ = v / div;
s -= back2;
}
s += fwd2;
}
/* Do any stray at the end of the stray line */
x += f;
if (x > 0)
{
int back4 = x * n - 1;
div = x * y;
for (nn = n; nn > 0; nn--)
{
int v = 0;
for (xx = x; xx > 0; xx--)
{
for (yy = y; yy > 0; yy--)
{
v += *s;
s += fwd;
}
s -= back5;
}
*d++ = v / div;
s -= back4;
}
}
}
#endif
tile->w = dst_w;
tile->h = dst_h;
tile->stride = dst_w * n;
tile->samples = fz_resize_array(ctx, tile->samples, dst_w * n, dst_h);
}
void
fz_set_pixmap_resolution(fz_context *ctx, fz_pixmap *pix, int xres, int yres)
{
pix->xres = xres;
pix->yres = yres;
}
void
fz_md5_pixmap(fz_context *ctx, fz_pixmap *pix, unsigned char digest[16])
{
fz_md5 md5;
fz_md5_init(&md5);
if (pix)
{
unsigned char *s = pix->samples;
int h = pix->h;
int ss = pix->stride;
int len = pix->w * pix->n;
while (h--)
{
fz_md5_update(&md5, s, len);
s += ss;
}
}
fz_md5_final(&md5, digest);
}
#ifdef HAVE_VALGRIND
int fz_valgrind_pixmap(const fz_pixmap *pix)
{
int w, h, n, total;
int ww, hh, nn;
int stride;
const unsigned char *p = pix->samples;
if (pix == NULL)
return 0;
total = 0;
ww = pix->w;
hh = pix->h;
nn = pix->n;
stride = pix->stride - ww*nn;
for (h = 0; h < hh; h++)
{
for (w = 0; w < ww; w++)
for (n = 0; n < nn; n++)
if (*p++) total ++;
p += stride;
}
return total;
}
#endif /* HAVE_VALGRIND */
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