int ratt_table_pos_isfrag(ratt_table_t *table, size_t pos)
{
uint8_t const *slot = table->frag_mask;
if (!ratt_table_isempty(table)
&& pos <= table->last)
shift_mask_slot(slot, pos);
return (*slot & shift_mask(pos));
return 0;
}
static inline int frag_mask_unset(uint8_t *slot, size_t pos, size_t *cnt)
{
uint8_t bitmask = shift_mask(pos);
shift_mask_slot(slot, pos);
if (!(*slot & bitmask)) {
debug("bitmask 0x%x absent from mask slot", bitmask);
return FAIL;
}
*slot &= ~bitmask;
(*cnt)--;
return OK;
}
static inline int frag_mask_set(uint8_t *slot, size_t pos, size_t *cnt)
{
uint8_t bitmask = shift_mask(pos);
shift_mask_slot(slot, pos);
if (*slot & bitmask) {
debug("bitmask 0x%x already set in mask slot", bitmask);
return FAIL;
}
*slot |= bitmask;
(*cnt)++;
return OK;
}
static inline int is_frag(uint8_t const *slot, size_t pos)
{
shift_mask_slot(slot, pos);
return (*slot & shift_mask(pos));
}
/* We separate device allocation and initialization at customer request. */
int
gs_initialize_wordimagedevice(gx_device_memory * new_dev, const gs_matrix * pmat,
uint width, uint height, const byte * colors, int colors_size,
bool word_oriented, bool page_device, gs_memory_t * mem)
{
const gx_device_memory *proto_dev;
int palette_count = colors_size;
int num_components = 1;
int pcount;
int bits_per_pixel;
float x_pixels_per_unit, y_pixels_per_unit;
byte palette[256 * 3];
bool has_color;
switch (colors_size) {
case 3 * 2:
palette_count = 2;
num_components = 3;
case 2:
bits_per_pixel = 1;
break;
case 3 * 4:
palette_count = 4;
num_components = 3;
case 4:
bits_per_pixel = 2;
break;
case 3 * 16:
palette_count = 16;
num_components = 3;
case 16:
bits_per_pixel = 4;
break;
case 3 * 256:
palette_count = 256;
num_components = 3;
case 256:
bits_per_pixel = 8;
break;
case -16:
bits_per_pixel = 16;
palette_count = 0;
break;
case -24:
bits_per_pixel = 24;
palette_count = 0;
break;
case -32:
bits_per_pixel = 32;
palette_count = 0;
break;
default:
return_error(gs_error_rangecheck);
}
proto_dev = (word_oriented ?
gdev_mem_word_device_for_bits(bits_per_pixel) :
gdev_mem_device_for_bits(bits_per_pixel));
if (proto_dev == 0) /* no suitable device */
return_error(gs_error_rangecheck);
pcount = palette_count * 3;
/* Check to make sure the palette contains white and black, */
/* and, if it has any colors, the six primaries. */
if (bits_per_pixel <= 8) {
const byte *p;
byte *q;
int primary_mask = 0;
int i;
has_color = false;
for (i = 0, p = colors, q = palette;
i < palette_count; i++, q += 3
) {
int mask = 1;
switch (num_components) {
case 1: /* gray */
q[0] = q[1] = q[2] = *p++;
break;
default /* case 3 */ : /* RGB */
q[0] = p[0], q[1] = p[1], q[2] = p[2];
p += 3;
}
#define shift_mask(b,n)\
switch ( b ) { case 0xff: mask <<= n; case 0: break; default: mask = 0; }
shift_mask(q[0], 4);
shift_mask(q[1], 2);
shift_mask(q[2], 1);
#undef shift_mask
primary_mask |= mask;
if (q[0] != q[1] || q[0] != q[2])
has_color = true;
}
switch (primary_mask) {
case 129: /* just black and white */
if (has_color) /* color but no primaries */
return_error(gs_error_rangecheck);
case 255: /* full color */
break;
default:
return_error(gs_error_rangecheck);
}
} else
has_color = true;
/*
* The initial transformation matrix must map 1 user unit to
* 1/72". Let W and H be the width and height in pixels, and
* assume the initial matrix is of the form [A 0 0 B X Y].
* Then the size of the image in user units is (W/|A|,H/|B|),
* hence the size in inches is ((W/|A|)/72,(H/|B|)/72), so
* the number of pixels per inch is
* (W/((W/|A|)/72),H/((H/|B|)/72)), or (|A|*72,|B|*72).
* Similarly, if the initial matrix is [0 A B 0 X Y] for a 90
* or 270 degree rotation, the size of the image in user
* units is (W/|B|,H/|A|), so the pixels per inch are
* (|B|*72,|A|*72). We forbid non-orthogonal transformation
* matrices.
*/
if (is_fzero2(pmat->xy, pmat->yx))
x_pixels_per_unit = pmat->xx, y_pixels_per_unit = pmat->yy;
else if (is_fzero2(pmat->xx, pmat->yy))
x_pixels_per_unit = pmat->yx, y_pixels_per_unit = pmat->xy;
else
return_error(gs_error_undefinedresult);
/* All checks done, initialize the device. */
if (bits_per_pixel == 1) {
/* Determine the polarity from the palette. */
gs_make_mem_device(new_dev, proto_dev, mem,
(page_device ? 1 : -1), 0);
/* This is somewhat bogus, but does the right thing */
/* in the only cases we care about. */
gdev_mem_mono_set_inverted(new_dev,
(palette[0] | palette[1] | palette[2]) != 0);
} else {
byte *dev_palette = gs_alloc_string(mem, pcount,
"gs_makeimagedevice(palette)");
if (dev_palette == 0)
return_error(gs_error_VMerror);
gs_make_mem_device(new_dev, proto_dev, mem,
(page_device ? 1 : -1), 0);
new_dev->palette.size = pcount;
new_dev->palette.data = dev_palette;
memcpy(dev_palette, palette, pcount);
if (!has_color) {
new_dev->color_info.num_components = 1;
new_dev->color_info.max_color = 0;
new_dev->color_info.dither_colors = 0;
new_dev->color_info.gray_index = 0;
}
}
/* Memory defice is always initialised as an internal device but */
/* this is an external device */
new_dev->retained = true;
rc_init(new_dev, new_dev->memory, 1);
new_dev->initial_matrix = *pmat;
new_dev->MarginsHWResolution[0] = new_dev->HWResolution[0] =
fabs(x_pixels_per_unit) * 72;
new_dev->MarginsHWResolution[1] = new_dev->HWResolution[1] =
fabs(y_pixels_per_unit) * 72;
gx_device_set_width_height((gx_device *) new_dev, width, height);
/* Set the ImagingBBox so we get a correct clipping region. */
{
gs_rect bbox;
bbox.p.x = 0;
bbox.p.y = 0;
bbox.q.x = width;
bbox.q.y = height;
gs_bbox_transform_inverse(&bbox, pmat, &bbox);
new_dev->ImagingBBox[0] = bbox.p.x;
new_dev->ImagingBBox[1] = bbox.p.y;
new_dev->ImagingBBox[2] = bbox.q.x;
new_dev->ImagingBBox[3] = bbox.q.y;
new_dev->ImagingBBox_set = true;
}
/* The bitmap will be allocated when the device is opened. */
new_dev->is_open = false;
new_dev->bitmap_memory = mem;
return 0;
}
