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RasterDisplay.cxx
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//
// CUPS/PWG Raster display widget methods.
//
// Copyright © 2002-2023 by Michael R Sweet.
//
// Licensed under Apache License v2.0. See the file "LICENSE" for more
// information.
//
#include "RasterDisplay.h"
#include <FL/Fl.H>
#include <FL/Fl_Window.H>
#include <FL/fl_ask.H>
#include <FL/fl_draw.H>
#include <FL/Fl_Preferences.H>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#if _WIN32
# include <io.h>
#else
# include <unistd.h>
#endif // _WIN32
#include <fcntl.h>
#include <errno.h>
#include <math.h>
#include <limits.h>
#include <FL/names.h>
//
// Absolute value macro...
//
#define abs(a) ((a) < 0 ? -(a) : (a))
//
// Constants...
//
#define D65_X (0.412453 + 0.357580 + 0.180423)
#define D65_Y (0.212671 + 0.715160 + 0.072169)
#define D65_Z (0.019334 + 0.119193 + 0.950227)
//
// Local globals...
//
static int endian_offset = -1;
static Fl_Preferences *prefs = NULL;
//
// Local functions...
//
static void convert_cmy(cups_page_header_t *header, uchar *line,
uchar *colors, uchar *pixels);
static void convert_cmyk(cups_page_header_t *header, uchar *line,
uchar *colors, uchar *pixels);
static void convert_device(cups_page_header_t *header, uchar *line, uchar *colors, uchar *pixels, uchar device_colors[][3]);
static void convert_k(cups_page_header_t *header, uchar *line,
uchar *colors, uchar *pixels);
static void convert_kcmy(cups_page_header_t *header, uchar *line,
uchar *colors, uchar *pixels);
static void convert_kcmycm(cups_page_header_t *header, uchar *line,
uchar *colors, uchar *pixels);
static void convert_lab(cups_page_header_t *header, uchar *line,
uchar *colors, uchar *pixels);
static void convert_rgb(cups_page_header_t *header, uchar *line,
uchar *colors, uchar *pixels);
static void convert_rgba(cups_page_header_t *header, int y, uchar *line,
uchar *colors, uchar *pixels);
static void convert_rgbw(cups_page_header_t *header, uchar *line,
uchar *colors, uchar *pixels);
static void convert_w(cups_page_header_t *header, uchar *line,
uchar *colors, uchar *pixels);
static void convert_xyz(cups_page_header_t *header, uchar *line,
uchar *colors, uchar *pixels);
static void convert_ymc(cups_page_header_t *header, uchar *line,
uchar *colors, uchar *pixels);
static void convert_ymck(cups_page_header_t *header, uchar *line,
uchar *colors, uchar *pixels);
static ssize_t raster_cb(gzFile ctx, unsigned char *buffer, size_t length);
static size_t rasterOffset(cups_raster_t *r);
static void rasterReset(cups_raster_t *r);
//
// 'RasterDisplay::RasterDisplay()' - Create a new raster display widget.
//
RasterDisplay::RasterDisplay(
int X, // I - X position
int Y, // I - Y position
int W, // I - Width
int H, // I - Height
const char *L) // I - Label string
: Fl_Group(X, Y, W, H, L),
xscrollbar_(X, Y + H - SBWIDTH, W - SBWIDTH, SBWIDTH),
yscrollbar_(X + W - SBWIDTH, Y, SBWIDTH, H - SBWIDTH)
{
end();
box(FL_DOWN_BOX);
memset(&header_, 0, sizeof(header_));
fp_ = NULL;
filename_ = NULL;
ras_ = NULL;
pixels_ = NULL;
alloc_pixels_ = 0;
colors_ = NULL;
alloc_colors_ = 0;
factor_ = 0.0;
mode_ = RASTER_MODE_ZOOM_IN;
mouse_x_ = 0;
mouse_y_ = 0;
xscrollbar_.type(FL_HORIZONTAL);
xscrollbar_.callback(scrollbar_cb, this);
yscrollbar_.type(FL_VERTICAL);
yscrollbar_.callback(scrollbar_cb, this);
resize(X, Y, W, H);
}
//
// 'RasterDisplay::~RasterDisplay()' - Destroy a raster display widget.
//
RasterDisplay::~RasterDisplay()
{
close_file();
}
//
// 'RasterDisplay::close_file()' - Close an opened raster file.
//
int // O - 1 on success, 0 on failure
RasterDisplay::close_file()
{
if (ras_)
{
cupsRasterClose(ras_);
ras_ = NULL;
}
if (fp_)
{
gzclose(fp_);
fp_ = NULL;
}
if (filename_)
{
free((void *)filename_);
filename_ = NULL;
}
if (pixels_)
{
delete[] pixels_;
pixels_ = NULL;
alloc_pixels_ = 0;
}
if (colors_)
{
delete[] colors_;
colors_ = NULL;
alloc_colors_ = 0;
}
memset(&header_, 0, sizeof(header_));
return (1);
}
//
// 'RasterDisplay::draw()' - Draw the raster display widget.
//
void
RasterDisplay::draw()
{
int xoff, yoff; // Offset of image
int X, Y, W, H; // Interior of widget
#ifdef DEBUG
puts("RasterDisplay::draw()");
#endif // DEBUG
X = x() + Fl::box_dx(box());
Y = y() + Fl::box_dy(box());
W = visible_w();
H = visible_h();
if (damage() & FL_DAMAGE_SCROLL)
fl_push_clip(X, Y, W, H);
if (factor_)
draw_box(box(), x(), y(), w() - SBWIDTH, h() - SBWIDTH, color());
else
draw_box();
if (damage() & FL_DAMAGE_SCROLL)
{
fl_pop_clip();
}
else if (factor_)
{
fl_color(FL_GRAY);
fl_rectf(x() + w() - SBWIDTH, y() + h() - SBWIDTH, SBWIDTH, SBWIDTH);
}
if (ras_ && pixels_ && header_.cupsWidth && header_.cupsHeight)
{
#ifdef DEBUG
printf(" pixels_=%p, cupsWidth=%d, cupsHeight=%d\n", pixels_,
header_.cupsWidth, header_.cupsHeight);
#endif // DEBUG
fl_push_clip(X, Y, W, H);
if (xsize_ <= W)
xoff = (W - xsize_) / 2;
else
xoff = 0;
if (ysize_ <= H)
yoff = (H - ysize_) / 2;
else
yoff = 0;
xoff += X;
yoff += Y;
xstep_ = header_.cupsWidth / xsize_;
xmod_ = header_.cupsWidth % xsize_;
#ifdef DEBUG
printf(" xoff=%d, yoff=%d, xsize_=%d, ysize_=%d, xstep_=%d, xmod_=%d\n", xoff, yoff, xsize_, ysize_, xstep_, xmod_);
#endif // DEBUG
fl_draw_image(image_cb, this, xoff, yoff, xsize_ > W ? W : xsize_, ysize_ > H ? H : ysize_, bpp_);
fl_pop_clip();
}
draw_label(X, Y, W, H - 2 * labelsize());
if (factor_)
{
if (damage() & FL_DAMAGE_SCROLL)
{
update_child(xscrollbar_);
update_child(yscrollbar_);
}
else
{
draw_child(xscrollbar_);
draw_child(yscrollbar_);
}
}
}
//
// 'RasterDisplay::get_color()' - Return the original color value for a coordinate.
//
uchar * // O - Color values or NULL
RasterDisplay::get_color(int X, // I - X position in image
int Y) // I - Y position in image
{
if (!colors_ || X < 0 || X >= (int)header_.cupsWidth ||
Y < 0 || Y >= (int)header_.cupsHeight)
return (NULL);
else
return (colors_ + (Y * header_.cupsWidth + X) * bpc_);
}
//
// 'RasterDisplay::get_pixel()' - Return the displayed color value for a coordinate.
//
uchar * // O - RGB color value or NULL
RasterDisplay::get_pixel(int X, // I - X position in image
int Y) // I - Y position in image
{
if (!pixels_ || X < 0 || X >= (int)header_.cupsWidth ||
Y < 0 || Y >= (int)header_.cupsHeight)
return (NULL);
else
return (pixels_ + (Y * header_.cupsWidth + X) * bpp_);
}
//
// 'RasterDisplay::handle()' - Handle events in the widget.
//
int // O - 1 if handled, 0 otherwise
RasterDisplay::handle(int event) // I - Event to handle
{
if (header_.cupsWidth && header_.cupsHeight)
{
switch (event)
{
case FL_ENTER :
case FL_MOVE :
update_mouse_xy();
if ((!yscrollbar_.visible() || Fl::event_x() < yscrollbar_.x()) &&
(!xscrollbar_.visible() || Fl::event_y() < xscrollbar_.y()))
switch (mode_)
{
case RASTER_MODE_PAN :
fl_cursor(FL_CURSOR_MOVE);
break;
case RASTER_MODE_ZOOM_IN :
case RASTER_MODE_ZOOM_OUT :
fl_cursor(FL_CURSOR_DEFAULT);
break;
default :
case RASTER_MODE_CLICK :
fl_cursor(FL_CURSOR_CROSS);
break;
}
else
fl_cursor(FL_CURSOR_DEFAULT);
return (1);
case FL_LEAVE :
fl_cursor(FL_CURSOR_DEFAULT);
return (1);
case FL_SHORTCUT :
switch (Fl::event_key())
{
case '-' : // Zoom out
if (factor_)
scale(factor_ * 0.8f);
else
scale((float)xsize_ / (float)header_.cupsWidth * 0.8f);
return (1);
case '=' : // Zoom in
if (factor_)
scale(factor_ * 1.25f);
else
scale((float)xsize_ / (float)header_.cupsWidth * 1.25f);
return (1);
case '0' : // Fit
scale(0.0f);
return (1);
case '1' : // 100%
case '2' : // 200%
case '3' : // 300%
case '4' : // 400%
case '5' : // 500%
case '6' : // 600%
case '7' : // 700%
case '8' : // 800%
scale((float)(Fl::event_key() - '0'));
return (1);
case '9' : // 2000% (max)
scale(20.0f);
return (1);
}
break;
case FL_PUSH :
if ((!yscrollbar_.visible() || Fl::event_x() < yscrollbar_.x()) &&
(!xscrollbar_.visible() || Fl::event_y() < xscrollbar_.y()))
{
update_mouse_xy();
last_x_ = Fl::event_x_root();
last_y_ = Fl::event_y_root();
start_x_ = mouse_x_;
start_y_ = mouse_y_;
start_ex_ = Fl::event_x();
start_ey_ = Fl::event_y();
if (mode_ == RASTER_MODE_CLICK)
do_callback();
return (1);
}
break;
case FL_DRAG :
switch (mode_)
{
case RASTER_MODE_PAN :
position(xscrollbar_.value() + last_x_ - Fl::event_x_root(),
yscrollbar_.value() + last_y_ - Fl::event_y_root());
break;
case RASTER_MODE_ZOOM_IN :
if ((Fl::event_x() < start_ex_ && Fl::event_y() < start_ey_) ||
(Fl::event_x() > start_ex_ && Fl::event_y() > start_ey_))
fl_cursor(FL_CURSOR_NWSE);
else
fl_cursor(FL_CURSOR_NESW);
window()->make_current();
fl_overlay_rect(start_ex_, start_ey_,
Fl::event_x() - start_ex_,
Fl::event_y() - start_ey_);
break;
case RASTER_MODE_CLICK :
do_callback();
break;
}
last_x_ = Fl::event_x_root();
last_y_ = Fl::event_y_root();
update_mouse_xy();
return (1);
case FL_RELEASE :
update_mouse_xy();
switch (mode_)
{
case RASTER_MODE_ZOOM_IN :
window()->make_current();
fl_cursor(FL_CURSOR_DEFAULT);
fl_overlay_clear();
if (Fl::event_button() == FL_LEFT_MOUSE)
{
int W, H;
W = visible_w();
H = visible_h();
if (abs(start_ex_ - Fl::event_x()) > 4 ||
abs(start_ey_ - Fl::event_y()) > 4)
{
// Zoom to box...
float xfactor, yfactor;
xfactor = (float)W / (float)abs(mouse_x_ - start_x_);
yfactor = (float)H / (float)abs(mouse_y_ - start_y_);
// printf("start_x_=%d, start_y_=%d, mouse_x_=%d, mouse_y_=%d\n",
// start_x_, start_y_, mouse_x_, mouse_y_);
// printf("W=%d, H=%d, dx=%d, dy=%d\n", W, H,
// abs(mouse_x_ - start_x_), abs(mouse_x_ - start_x_));
// printf("xfactor=%g, yfactor=%g\n", xfactor, yfactor);
scale(xfactor < yfactor ? xfactor : yfactor);
position((int)((mouse_x_ < start_x_ ? mouse_x_ : start_x_) * scale()),
(int)((mouse_y_ < start_y_ ? mouse_y_ : start_y_) * scale()));
}
else
{
if (factor_)
scale(factor_ * 1.25f);
else
scale((float)xsize_ / (float)header_.cupsWidth * 1.25f);
position((int)((mouse_x_ < start_x_ ? mouse_x_ : start_x_) * scale()) - W / 2,
(int)((mouse_y_ < start_y_ ? mouse_y_ : start_y_) * scale()) - H / 2);
}
break;
}
case RASTER_MODE_ZOOM_OUT :
if (factor_)
scale(factor_ * 0.8f);
else
scale((float)xsize_ / (float)header_.cupsWidth * 0.8f);
break;
case RASTER_MODE_CLICK :
do_callback();
break;
}
return (1);
case FL_ZOOM_GESTURE :
if (Fl::event_dy() < 0)
{
// Zoom out
if (factor_)
scale(factor_ * 0.875f);
else
scale((float)xsize_ / (float)header_.cupsWidth * 0.875f);
}
else
{
// Zoom in
// update_mouse_xy();
if (factor_)
scale(factor_ * 1.125f);
else
scale((float)xsize_ / (float)header_.cupsWidth * 1.125f);
int W, H;
W = visible_w();
H = visible_h();
position((int)(mouse_x_ * scale()) - W / 2, (int)(mouse_y_ * scale()) - H / 2);
}
return (1);
}
}
return (Fl_Group::handle(event));
}
//
// 'RasterDisplay::image_cb()' - Provide a single line of an image.
//
void
RasterDisplay::image_cb(void *p, // I - Raster display widget
int X, // I - X offset
int Y, // I - Y offset
int W, // I - Width of image row
uchar *D) // O - Image data
{
RasterDisplay *display; // Display widget
const uchar *inptr; // Pointer into image
int bpp, // Bytes per pixel value
xerr, // Bresenheim values
xstep, // ...
xmod, // ...
xsize; // ...
// printf("image_cb(p=%p, X=%d, Y=%d, W=%d, D=%p)\n", p, X, Y, W, D);
display = (RasterDisplay *)p;
bpp = display->bpp_;
xstep = display->xstep_ * bpp;
xmod = display->xmod_;
xsize = display->xsize_;
xerr = ((X + display->xscrollbar_.value()) * xmod) % xsize;
X = (X + display->xscrollbar_.value()) * display->header_.cupsWidth / xsize;
Y = (Y + display->yscrollbar_.value()) * display->header_.cupsHeight / display->ysize_;
inptr = display->pixels_ + (Y * display->header_.cupsWidth + X) * bpp;
if (xstep == bpp && xmod == 0)
{
memcpy(D, inptr, (size_t)W * bpp);
}
else if (bpp == 1)
{
for (; W > 0; W --)
{
*D++ = *inptr;
inptr += xstep;
xerr += xmod;
if (xerr >= xsize)
{
xerr -= xsize;
inptr += bpp;
}
}
}
else
{
for (; W > 0; W --)
{
*D++ = inptr[0];
*D++ = inptr[1];
*D++ = inptr[2];
inptr += xstep;
xerr += xmod;
if (xerr >= xsize)
{
xerr -= xsize;
inptr += bpp;
}
}
}
}
//
// 'RasterDisplay::is_subtractive()' - Is the color space subtractive?
//
int
RasterDisplay::is_subtractive()
{
return ((header_.cupsColorSpace >= CUPS_CSPACE_K && header_.cupsColorSpace <= CUPS_CSPACE_SILVER) ||
(header_.cupsColorSpace >= CUPS_CSPACE_DEVICE1 && header_.cupsColorSpace <= CUPS_CSPACE_DEVICEF));
}
//
// 'RasterDisplay::load_colors()' - Load device colors.
//
void
RasterDisplay::load_colors()
{
int i; // Looping var
char key[256], // Key string
*value; // Value
unsigned c, m ,y; // Colors
if (!is_subtractive() || header_.cupsBitsPerColor < 8)
return;
if (!prefs)
prefs = new Fl_Preferences(Fl_Preferences::USER, "msweet.org", "rasterview");
for (i = 0; i < header_.cupsNumColors; i ++)
{
snprintf(key, sizeof(key), "cs%dc%d", header_.cupsColorSpace, i);
if (prefs->get(key, value, "") && sscanf(value, "%u %u %u", &c, &m, &y) == 3)
{
device_colors_[i][0] = c;
device_colors_[i][1] = m;
device_colors_[i][2] = y;
}
}
}
//
// 'RasterDisplay::load_page()' - Load the next page from a raster stream.
//
int // O - 1 on success, 0 on failure
RasterDisplay::load_page()
{
union
{
unsigned char bytes[sizeof(int)];
int integer;
} endian_test; // Endian test variable
if (!ras_ || page_ >= num_pages_)
return (0);
if (!cupsRasterReadHeader(ras_, &header_))
{
int err;
fl_alert("Unable to read page header: %s", gzerror(fp_, &err));
return (0);
}
page_ ++;
if (header_.cupsColorOrder == CUPS_ORDER_PLANAR)
{
fl_alert("Sorry, RasterView doesn't support planar raster data at this time.");
return (0);
}
// Allocate memory for the page data...
#ifdef DEBUG
fprintf(stderr, "DEBUG: sizeof(cups_page_header_t) = %d\n", (int)sizeof(cups_page_header_t));
fprintf(stderr, "DEBUG: sizeof(cups_page_header_t) = %d\n", (int)sizeof(cups_page_header_t));
fprintf(stderr, "DEBUG: MediaClass = \"%s\"\n", header_.MediaClass);
fprintf(stderr, "DEBUG: MediaColor = \"%s\"\n", header_.MediaColor);
fprintf(stderr, "DEBUG: MediaType = \"%s\"\n", header_.MediaType);
fprintf(stderr, "DEBUG: OutputType = \"%s\"\n", header_.OutputType);
fprintf(stderr, "DEBUG: AdvanceDistance = %d(%x)\n", header_.AdvanceDistance,
header_.AdvanceDistance);
fprintf(stderr, "DEBUG: AdvanceMedia = %d(%x)\n", header_.AdvanceMedia,
header_.AdvanceMedia);
fprintf(stderr, "DEBUG: Collate = %d(%x)\n", header_.Collate,
header_.Collate);
fprintf(stderr, "DEBUG: CutMedia = %d(%x)\n", header_.CutMedia,
header_.CutMedia);
fprintf(stderr, "DEBUG: Duplex = %d(%x)\n", header_.Duplex, header_.Duplex);
fprintf(stderr, "DEBUG: HWResolution = [ %d(%x) %d(%x) ]\n",
header_.HWResolution[0], header_.HWResolution[0],
header_.HWResolution[1], header_.HWResolution[1]);
fprintf(stderr,
"DEBUG: ImagingBoundingBox = [ %d(%x) %d(%x) %d(%x) %d(%x) ]\n",
header_.ImagingBoundingBox[0], header_.ImagingBoundingBox[0],
header_.ImagingBoundingBox[1], header_.ImagingBoundingBox[1],
header_.ImagingBoundingBox[2], header_.ImagingBoundingBox[2],
header_.ImagingBoundingBox[3], header_.ImagingBoundingBox[3]);
fprintf(stderr, "DEBUG: InsertSheet = %d(%x)\n", header_.InsertSheet,
header_.InsertSheet);
fprintf(stderr, "DEBUG: Jog = %d(%x)\n", header_.Jog, header_.Jog);
fprintf(stderr, "DEBUG: LeadingEdge = %d(%x)\n", header_.LeadingEdge,
header_.LeadingEdge);
fprintf(stderr, "DEBUG: Margins = [ %d(%x) %d(%x) ]\n",
header_.Margins[0], header_.Margins[0],
header_.Margins[1], header_.Margins[1]);
fprintf(stderr, "DEBUG: ManualFeed = %d(%x)\n", header_.ManualFeed,
header_.ManualFeed);
fprintf(stderr, "DEBUG: MediaPosition = %d(%x)\n", header_.MediaPosition,
header_.MediaPosition);
fprintf(stderr, "DEBUG: MediaWeight = %d(%x)\n", header_.MediaWeight,
header_.MediaWeight);
fprintf(stderr, "DEBUG: MirrorPrint = %d(%x)\n", header_.MirrorPrint,
header_.MirrorPrint);
fprintf(stderr, "DEBUG: NegativePrint = %d(%x)\n", header_.NegativePrint,
header_.NegativePrint);
fprintf(stderr, "DEBUG: NumCopies = %d(%x)\n", header_.NumCopies,
header_.NumCopies);
fprintf(stderr, "DEBUG: Orientation = %d(%x)\n", header_.Orientation,
header_.Orientation);
fprintf(stderr, "DEBUG: OutputFaceUp = %d(%x)\n", header_.OutputFaceUp,
header_.OutputFaceUp);
fprintf(stderr, "DEBUG: PageSize = [ %d(%x) %d(%x) ]\n",
header_.PageSize[0], header_.PageSize[0],
header_.PageSize[1], header_.PageSize[1]);
fprintf(stderr, "DEBUG: Separations = %d(%x)\n", header_.Separations,
header_.Separations);
fprintf(stderr, "DEBUG: TraySwitch = %d(%x)\n", header_.TraySwitch,
header_.TraySwitch);
fprintf(stderr, "DEBUG: Tumble = %d(%x)\n", header_.Tumble, header_.Tumble);
fprintf(stderr, "DEBUG: cupsWidth = %d(%x)\n", header_.cupsWidth,
header_.cupsWidth);
fprintf(stderr, "DEBUG: cupsHeight = %d(%x)\n", header_.cupsHeight,
header_.cupsHeight);
fprintf(stderr, "DEBUG: cupsMediaType = %d(%x)\n", header_.cupsMediaType,
header_.cupsMediaType);
fprintf(stderr, "DEBUG: cupsBitsPerColor = %d(%x)\n",
header_.cupsBitsPerColor, header_.cupsBitsPerColor);
fprintf(stderr, "DEBUG: cupsBitsPerPixel = %d(%x)\n",
header_.cupsBitsPerPixel, header_.cupsBitsPerPixel);
fprintf(stderr, "DEBUG: cupsBytesPerLine = %d(%x)\n",
header_.cupsBytesPerLine, header_.cupsBytesPerLine);
fprintf(stderr, "DEBUG: cupsColorOrder = %d(%x)\n", header_.cupsColorOrder,
header_.cupsColorOrder);
fprintf(stderr, "DEBUG: cupsColorSpace = %d(%x)\n", header_.cupsColorSpace,
header_.cupsColorSpace);
fprintf(stderr, "DEBUG: cupsCompression = %d(%x)\n", header_.cupsCompression,
header_.cupsCompression);
fprintf(stderr, "DEBUG: cupsNumColors = %d(%x)\n", header_.cupsNumColors,
header_.cupsNumColors);
#endif // DEBUG
bpp_ = ((header_.cupsBitsPerColor < 8 || !is_subtractive()) && header_.cupsNumColors == 1) ? 1 : 3;
if (header_.cupsWidth == 0 || header_.cupsWidth > 1000000 || header_.cupsHeight == 0 || header_.cupsHeight > 1000000)
{
fl_alert("Sorry, image dimensions are out of range (%ux%u).", header_.cupsWidth, header_.cupsHeight);
return (0);
}
long pixelsize = (long)header_.cupsWidth * bpp_;
long bytes = pixelsize * header_.cupsHeight;
if (bytes >= INT_MAX)
{
fl_alert("Sorry, image is too large to display (%ux%ux%u >= 2GB).", header_.cupsWidth, header_.cupsHeight, header_.cupsBitsPerPixel);
return (0);
}
if (bytes > alloc_pixels_)
{
if (pixels_)
delete[] pixels_;
pixels_ = new uchar[bytes];
alloc_pixels_ = bytes;
if (!pixels_)
{
fl_alert("Unable to allocate %ld bytes for page data.", bytes);
return (0);
}
}
bpc_ = (header_.cupsBitsPerPixel + 7) / 8;
if (header_.cupsColorOrder != CUPS_ORDER_CHUNKED)
bpc_ *= header_.cupsNumColors;
long colorsize = (long)header_.cupsWidth * bpc_;
bytes = colorsize * header_.cupsHeight;
if (bytes > alloc_colors_)
{
if (colors_)
delete[] colors_;
colors_ = new uchar[bytes];
alloc_colors_ = bytes;
if (!colors_)
{
fl_alert("Unable to allocate %ld bytes for page data.", bytes);
return (0);
}
}
// Update the page dimensions/scaling...
resize(x(), y(), w(), h());
memset(colors_, 0, alloc_colors_);
memset(pixels_, 255, alloc_pixels_);
uchar *line = new uchar[header_.cupsBytesPerLine];
if (!line)
{
fl_alert("Unable to allocate %d bytes for raster data.", header_.cupsBytesPerLine);
return (0);
}
// See what word order we need to use...
if (endian_offset < 0)
{
memset(&endian_test, 0, sizeof(endian_test));
endian_test.bytes[sizeof(endian_test.bytes) - 1] = 1;
if (endian_test.integer == 1)
endian_offset = 0; // Big endian
else
endian_offset = 1; // Little endian
}
// Set device colors...
memset(device_colors_, 255, sizeof(device_colors_));
switch (header_.cupsColorSpace)
{
case CUPS_CSPACE_DEVICE3 :
case CUPS_CSPACE_DEVICE4 :
case CUPS_CSPACE_CMY :
case CUPS_CSPACE_CMYK :
device_colors_[0][1] = device_colors_[0][2] = 0;
device_colors_[1][0] = device_colors_[1][2] = 0;
device_colors_[2][0] = device_colors_[2][1] = 0;
break;
case CUPS_CSPACE_YMC :
case CUPS_CSPACE_YMCK :
device_colors_[0][0] = device_colors_[0][1] = 0;
device_colors_[1][0] = device_colors_[1][2] = 0;
device_colors_[2][1] = device_colors_[2][2] = 0;
break;
case CUPS_CSPACE_DEVICE6 :
device_colors_[0][1] = device_colors_[0][2] = 0;
device_colors_[1][0] = device_colors_[1][2] = 0;
device_colors_[2][0] = device_colors_[2][1] = 0;
device_colors_[4][0] = 127; device_colors_[4][1] = device_colors_[4][2] = 0;
device_colors_[5][1] = 127; device_colors_[5][0] = device_colors_[5][2] = 0;
break;
case CUPS_CSPACE_W :
case CUPS_CSPACE_SW :
device_colors_[0][0] = device_colors_[0][1] = device_colors_[0][2] = 0;
break;
case CUPS_CSPACE_RGB :
case CUPS_CSPACE_SRGB :
case CUPS_CSPACE_ADOBERGB :
device_colors_[0][0] = 0;
device_colors_[1][1] = 0;
device_colors_[2][2] = 0;
break;
default :
break;
}
load_colors();
// Read the raster data...
uchar *pptr, // Pointer into pixels_
*cptr; // Pointer into colors_
int py; // Current position in page
for (py = header_.cupsHeight, cptr = colors_, pptr = pixels_;
py > 0;
py --, cptr += colorsize, pptr += pixelsize)
{
if ((py % header_.HWResolution[1]) == 0)
{
// Update the screen to show progress...
redraw();
Fl::check();
}
if (!cupsRasterReadPixels(ras_, line, header_.cupsBytesPerLine))
{
fl_alert("Unable to read page data: %s", strerror(errno));
delete[] line;
return (0);
}
switch (header_.cupsColorSpace)
{
case CUPS_CSPACE_DEVICE1 :
case CUPS_CSPACE_DEVICE2 :
case CUPS_CSPACE_DEVICE3 :
case CUPS_CSPACE_DEVICE4 :
case CUPS_CSPACE_DEVICE5 :
case CUPS_CSPACE_DEVICE6 :
case CUPS_CSPACE_DEVICE7 :
case CUPS_CSPACE_DEVICE8 :
case CUPS_CSPACE_DEVICE9 :
case CUPS_CSPACE_DEVICEA :
case CUPS_CSPACE_DEVICEB :
case CUPS_CSPACE_DEVICEC :
case CUPS_CSPACE_DEVICED :
case CUPS_CSPACE_DEVICEE :
case CUPS_CSPACE_DEVICEF :
convert_device(&header_, line, cptr, pptr, device_colors_);
break;
case CUPS_CSPACE_W :
case CUPS_CSPACE_SW :
convert_w(&header_, line, cptr, pptr);
break;
case CUPS_CSPACE_RGB :
case CUPS_CSPACE_SRGB :
case CUPS_CSPACE_ADOBERGB :
convert_rgb(&header_, line, cptr, pptr);
break;
case CUPS_CSPACE_RGBA :
convert_rgba(&header_, py, line, cptr, pptr);
break;
case CUPS_CSPACE_RGBW :
convert_rgbw(&header_, line, cptr, pptr);
break;
case CUPS_CSPACE_K :
case CUPS_CSPACE_WHITE :
case CUPS_CSPACE_GOLD :
case CUPS_CSPACE_SILVER :
if (header_.cupsBitsPerColor >= 8)
convert_device(&header_, line, cptr, pptr, device_colors_);
else
convert_k(&header_, line, cptr, pptr);
break;
case CUPS_CSPACE_CMY :
if (header_.cupsBitsPerColor >= 8)
convert_device(&header_, line, cptr, pptr, device_colors_);
else
convert_cmy(&header_, line, cptr, pptr);
break;
case CUPS_CSPACE_YMC :
if (header_.cupsBitsPerColor >= 8)
convert_device(&header_, line, cptr, pptr, device_colors_);
else
convert_ymc(&header_, line, cptr, pptr);
break;
case CUPS_CSPACE_KCMYcm :
if (header_.cupsBitsPerColor == 1)
{
convert_kcmycm(&header_, line, cptr, pptr);
break;
}
case CUPS_CSPACE_KCMY :
if (header_.cupsBitsPerColor >= 8)
convert_device(&header_, line, cptr, pptr, device_colors_);
else
convert_kcmy(&header_, line, cptr, pptr);
break;
case CUPS_CSPACE_CMYK :
if (header_.cupsBitsPerColor >= 8)