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A loader for PCX files. (#113035, Josh Beam)

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2003-05-21  Matthias Clasen  <maclas@gmx.de>

	* pixbufloader_pcx.def:
	* io-pcx.c: A loader for PCX files.  (#113035, Josh Beam)

	* gdk-pixbuf-io.c:
	* Makefile.am: Add PCX loader.
This commit is contained in:
Matthias Clasen
2003-05-21 20:20:07 +00:00
committed by Matthias Clasen
parent ec288c7017
commit b5adee991a
11 changed files with 803 additions and 4 deletions
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2
ChangeLog
View File

@ -23,6 +23,8 @@ Tue May 20 21:58:00 2003 Hidetoshi Tajima <hidetoshi.tajima@sun.com>
2003-05-21 Matthias Clasen <maclas@gmx.de>
* configure.in (all_loaders): Add pcx.
* gtk/gtkcalendar.c: Make calendar controls spin. (#112540)
Tue May 20 17:27:24 2003 Owen Taylor <otaylor@redhat.com>

2
ChangeLog.pre-2-10
View File

@ -23,6 +23,8 @@ Tue May 20 21:58:00 2003 Hidetoshi Tajima <hidetoshi.tajima@sun.com>
2003-05-21 Matthias Clasen <maclas@gmx.de>
* configure.in (all_loaders): Add pcx.
* gtk/gtkcalendar.c: Make calendar controls spin. (#112540)
Tue May 20 17:27:24 2003 Owen Taylor <otaylor@redhat.com>

2
ChangeLog.pre-2-4
View File

@ -23,6 +23,8 @@ Tue May 20 21:58:00 2003 Hidetoshi Tajima <hidetoshi.tajima@sun.com>
2003-05-21 Matthias Clasen <maclas@gmx.de>
* configure.in (all_loaders): Add pcx.
* gtk/gtkcalendar.c: Make calendar controls spin. (#112540)
Tue May 20 17:27:24 2003 Owen Taylor <otaylor@redhat.com>

2
ChangeLog.pre-2-6
View File

@ -23,6 +23,8 @@ Tue May 20 21:58:00 2003 Hidetoshi Tajima <hidetoshi.tajima@sun.com>
2003-05-21 Matthias Clasen <maclas@gmx.de>
* configure.in (all_loaders): Add pcx.
* gtk/gtkcalendar.c: Make calendar controls spin. (#112540)
Tue May 20 17:27:24 2003 Owen Taylor <otaylor@redhat.com>

2
ChangeLog.pre-2-8
View File

@ -23,6 +23,8 @@ Tue May 20 21:58:00 2003 Hidetoshi Tajima <hidetoshi.tajima@sun.com>
2003-05-21 Matthias Clasen <maclas@gmx.de>
* configure.in (all_loaders): Add pcx.
* gtk/gtkcalendar.c: Make calendar controls spin. (#112540)
Tue May 20 17:27:24 2003 Owen Taylor <otaylor@redhat.com>

2
configure.in
View File

@ -827,7 +827,7 @@ else
fi
fi
all_loaders="png,bmp,wbmp,gif,ico,ani,jpeg,pnm,ras,tiff,xpm,tga"
all_loaders="png,bmp,wbmp,gif,ico,ani,jpeg,pnm,ras,tiff,xpm,tga,pcx"
included_loaders=""
# If no loaders specified, include all
if test "x$with_included_loaders" = xyes ; then

8
gdk-pixbuf/ChangeLog
View File

@ -1,3 +1,11 @@
2003-05-21 Matthias Clasen <maclas@gmx.de>
* pixbufloader_pcx.def:
* io-pcx.c: A loader for PCX files. (#113035, Josh Beam)
* gdk-pixbuf-io.c:
* Makefile.am: Add PCX loader.
2003-05-19 Matthias Clasen <maclas@gmx.de>
Improve progressive loading from slow sources: (#107368)

17
gdk-pixbuf/Makefile.am
View File

@ -150,6 +150,14 @@ libpixbufloader_tga_la_SOURCES = io-tga.c
libpixbufloader_tga_la_LDFLAGS = -avoid-version -module $(no_undefined)
libpixbufloader_tga_la_LIBADD = $(module_libs)
#
# The PCX loader
#
libpixbufloader_static_pcx_la_SOURCES = io-pcx.c
libpixbufloader_pcx_la_SOURCES = io-pcx.c
libpixbufloader_pcx_la_LDFLAGS = -avoid-version -module $(no_undefined)
libpixbufloader_pcx_la_LIBADD = $(module_libs)
if HAVE_PNG
PNG_LIB = libpixbufloader-png.la
STATIC_PNG_LIB = libpixbufloader-static-png.la
@ -195,6 +203,9 @@ STATIC_XBM_LIB = libpixbufloader-static-xbm.la
TGA_LIB = libpixbufloader-tga.la
STATIC_TGA_LIB = libpixbufloader-static-tga.la
PCX_LIB = libpixbufloader-pcx.la
STATIC_PCX_LIB = libpixbufloader-static-pcx.la
if BUILD_DYNAMIC_MODULES
loader_LTLIBRARIES = \
@ -210,7 +221,8 @@ loader_LTLIBRARIES = \
$(BMP_LIB) \
$(WBMP_LIB) \
$(XBM_LIB) \
$(TGA_LIB)
$(TGA_LIB) \
$(PCX_LIB)
extra_sources =
@ -231,7 +243,8 @@ noinst_LTLIBRARIES = \
$(STATIC_BMP_LIB) \
$(STATIC_WBMP_LIB) \
$(STATIC_XBM_LIB) \
$(STATIC_TGA_LIB)
$(STATIC_TGA_LIB) \
$(STATIC_PCX_LIB)
builtin_objs = @INCLUDED_LOADER_OBJ@

10
gdk-pixbuf/gdk-pixbuf-io.c
View File

@ -413,6 +413,7 @@ module (tiff);
module (xpm);
module (xbm);
module (tga);
module (pcx);
gboolean
_gdk_pixbuf_load_module (GdkPixbufModule *image_module,
@ -518,6 +519,13 @@ _gdk_pixbuf_load_module (GdkPixbufModule *image_module,
}
#endif
#ifdef INCLUDE_pcx
else if (strcmp (image_module->module_name, "pcx") == 0) {
fill_info = MODULE_ENTRY (pcx, fill_info);
fill_vtable = MODULE_ENTRY (pcx, fill_vtable);
}
#endif
if (fill_vtable) {
(* fill_vtable) (image_module);
image_module->info = g_new0 (GdkPixbufFormat, 1);
@ -541,7 +549,7 @@ gdk_pixbuf_io_init ()
gchar *included_formats[] = {
"ani", "png", "bmp", "wbmp", "gif",
"ico", "jpeg", "pnm", "ras", "tiff",
"xpm", "xbm", "tga",
"xpm", "xbm", "tga", "pcx",
NULL
};
gchar **name;

757
gdk-pixbuf/io-pcx.c Normal file
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@ -0,0 +1,757 @@
/*
* GdkPixbuf library - PCX image loader
*
* Copyright (C) 2003 Josh A. Beam
*
* Authors: Josh A. Beam <josh@joshbeam.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include <stdio.h>
#include <string.h>
#include "gdk-pixbuf-private.h"
#include "gdk-pixbuf-io.h"
#define PCX_DEBUG
#define PCX_TASK_DONE 0
#define PCX_TASK_LOAD_HEADER 1
#define PCX_TASK_LOAD_DATA 2
#define PCX_TASK_LOAD_PALETTE 3
struct pcx_header {
guint8 manufacturer;
guint8 version;
guint8 encoding;
guint8 bitsperpixel;
gint16 xmin;
gint16 ymin;
gint16 xmax;
gint16 ymax;
guint16 horizdpi;
guint16 vertdpi;
guint8 palette[48];
guint8 reserved;
guint8 colorplanes;
guint16 bytesperline;
guint16 palettetype;
guint16 hscrsize;
guint16 vscrsize;
guint8 filler[54];
};
struct pcx_context {
GdkPixbuf *pixbuf;
gint rowstride;
GdkPixbufModuleSizeFunc size_func;
GdkPixbufModuleUpdatedFunc updated_func;
GdkPixbufModulePreparedFunc prepared_func;
gpointer user_data;
guchar current_task;
gboolean header_loaded;
struct pcx_header *header;
guint bpp;
gint width, height;
guint num_planes;
guint bytesperline;
guchar *buf;
guint buf_size;
guint buf_pos;
guchar *data;
guchar *line;
guint current_line;
guchar *p_data;
};
/*
* set context's image information based on the header
*/
static void
fill_pcx_context(struct pcx_context *context)
{
struct pcx_header *header = context->header;
context->bpp = header->bitsperpixel;
context->width = header->xmax - header->xmin + 1;
context->height = header->ymax - header->ymin + 1;
context->num_planes = header->colorplanes;
context->bytesperline = header->bytesperline;
if(header->version == 5 && context->bpp == 8 && context->num_planes == 3)
context->bpp = 24;
}
static void
free_pcx_context(struct pcx_context *context, gboolean unref_pixbuf)
{
if(context->header)
g_free(context->header);
if(context->buf)
g_free(context->buf);
if(unref_pixbuf && context->pixbuf)
g_object_unref(context->pixbuf);
if(context->line)
g_free(context->line);
if(context->p_data)
g_free(context->p_data);
g_free(context);
}
/*
* read each plane of a single scanline. store_planes is
* the number of planes that can be stored in the planes array.
* data is the pointer to the block of memory to read
* from, size is the length of that data, and line_bytes
* is where the number of bytes read will be stored.
*/
static gboolean
read_scanline_data(guchar *data, guint size, guchar *planes[],
guint store_planes, guint num_planes, guint bytesperline,
guint *line_bytes)
{
guint i, j;
guint p, count;
guint d = 0;
guint8 byte;
for(p = 0; p < num_planes; p++) {
for(i = 0; i < bytesperline;) { /* i incremented when line byte set */
if(d >= size)
return FALSE;
byte = data[d++];
if(byte >> 6 == 0x3) {
count = byte & ~(0x3 << 6);
if(count == 0)
return FALSE;
if(d >= size)
return FALSE;
byte = data[d++];
} else {
count = 1;
}
for(j = 0; j < count; j++) {
if(p < store_planes)
planes[p][i++] = byte;
else
i++;
if(i >= bytesperline) {
p++;
if(p >= num_planes) {
*line_bytes = d;
return TRUE;
}
i = 0;
}
}
}
}
*line_bytes = d; /* number of bytes read for scanline */
return TRUE;
}
static gpointer
gdk_pixbuf__pcx_begin_load(GdkPixbufModuleSizeFunc size_func,
GdkPixbufModulePreparedFunc prepared_func,
GdkPixbufModuleUpdatedFunc updated_func,
gpointer user_data, GError **error)
{
struct pcx_context *context;
context = g_new0(struct pcx_context, 1);
if(!context)
return NULL;
context->header = g_try_malloc(sizeof(struct pcx_header));
if(!context->header) {
g_free(context);
g_set_error(error, GDK_PIXBUF_ERROR, GDK_PIXBUF_ERROR_INSUFFICIENT_MEMORY, _("Couldn't allocate memory for header"));
return NULL;
}
context->size_func = size_func;
context->updated_func = updated_func;
context->prepared_func = prepared_func;
context->user_data = user_data;
context->current_task = PCX_TASK_LOAD_HEADER;
context->buf = g_try_malloc(sizeof(guchar) * 512);
if(!context->buf) {
g_free(context->header);
g_free(context);
g_set_error(error, GDK_PIXBUF_ERROR, GDK_PIXBUF_ERROR_INSUFFICIENT_MEMORY, _("Couldn't allocate memory for context buffer"));
return NULL;
}
context->buf_size = 512;
context->header_loaded = FALSE;
return context;
}
static gboolean
pcx_resize_context_buf(struct pcx_context *context, guint size)
{
guchar *new_buf;
new_buf = g_try_realloc(context->buf, size);
if(!new_buf)
return FALSE;
context->buf = new_buf;
context->buf_size = size;
return TRUE;
}
/*
* remove a number of bytes (specified by size) from the
* beginning of a context's buf
*/
static gboolean
pcx_chop_context_buf(struct pcx_context *context, guint size)
{
guint i, j;
if(size > context->buf_pos)
return FALSE;
else if(size < 0)
return FALSE;
else if(size == 0)
return TRUE;
for(i = 0, j = size; j < context->buf_pos; i++, j++)
context->buf[i] = context->buf[j];
context->buf_pos -= size;
return TRUE;
}
static guchar
read_pixel_1(guchar *data, guint offset)
{
guchar retval;
guint bit_offset;
if(!(offset % 8)) {
offset /= 8;
retval = data[offset] >> 7;
} else {
bit_offset = offset % 8;
offset -= bit_offset;
offset /= 8;
retval = (data[offset] >> (7 - bit_offset)) & 0x1;
}
return retval;
}
static guchar
read_pixel_4(guchar *data, guint offset)
{
guchar retval;
if(!(offset % 2)) {
offset /= 2;
retval = data[offset] >> 4;
} else {
offset--;
offset /= 2;
retval = data[offset] & 0xf;
}
return retval;
}
static gboolean
pcx_increment_load_data_1(struct pcx_context *context)
{
guint i;
guchar *planes[4];
guint line_bytes;
guint store_planes;
if(context->num_planes == 4) {
planes[0] = context->line;
planes[1] = planes[0] + context->bytesperline;
planes[2] = planes[1] + context->bytesperline;
planes[3] = planes[2] + context->bytesperline;
store_planes = 4;
} else if(context->num_planes == 3) {
planes[0] = context->line;
planes[1] = planes[0] + context->bytesperline;
planes[2] = planes[1] + context->bytesperline;
store_planes = 3;
} else if(context->num_planes == 2) {
planes[0] = context->line;
planes[1] = planes[0] + context->bytesperline;
store_planes = 2;
} else if(context->num_planes == 1) {
planes[0] = context->line;
store_planes = 1;
} else {
return FALSE;
}
while(read_scanline_data(context->buf, context->buf_pos, planes, store_planes, context->num_planes, context->bytesperline, &line_bytes)) {
pcx_chop_context_buf(context, line_bytes);
for(i = 0; i < context->width; i++) {
guchar p;
if(context->num_planes == 4) {
p = read_pixel_1(planes[3], i);
p <<= 1;
p |= read_pixel_1(planes[2], i);
p <<= 1;
p |= read_pixel_1(planes[1], i);
p <<= 1;
p |= read_pixel_1(planes[0], i);
} else if(context->num_planes == 3) {
p = read_pixel_1(planes[2], i);
p <<= 1;
p |= read_pixel_1(planes[1], i);
p <<= 1;
p |= read_pixel_1(planes[0], i);
} else if(context->num_planes == 2) {
p = read_pixel_1(planes[1], i);
p <<= 1;
p |= read_pixel_1(planes[0], i);
} else if(context->num_planes == 1) {
p = read_pixel_1(planes[0], i);
} else {
return FALSE;
}
p &= 0xf;
context->data[context->current_line * context->rowstride + i * 3 + 0] = context->header->palette[p * 3 + 0];
context->data[context->current_line * context->rowstride + i * 3 + 1] = context->header->palette[p * 3 + 1];
context->data[context->current_line * context->rowstride + i * 3 + 2] = context->header->palette[p * 3 + 2];
}
if(context->updated_func)
context->updated_func(context->pixbuf, 0, context->current_line, context->width, 1, context->user_data);
context->current_line++;
if(context->current_line == context->height) {
context->current_task = PCX_TASK_DONE;
return TRUE;
}
}
return TRUE;
}
static gboolean
pcx_increment_load_data_2(struct pcx_context *context)
{
guint i;
guchar *planes[1];
guint line_bytes;
guint shift, h;
planes[0] = context->line;
while(read_scanline_data(context->buf, context->buf_pos, planes, 1, context->num_planes, context->bytesperline, &line_bytes)) {
pcx_chop_context_buf(context, line_bytes);
for(i = 0; i < context->width; i++) {
shift = 6 - 2 * (i % 4);
h = (planes[0][i / 4] >> shift) & 0x3;
context->data[context->current_line * context->rowstride + i * 3 + 0] = context->header->palette[h * 3 + 0];
context->data[context->current_line * context->rowstride + i * 3 + 1] = context->header->palette[h * 3 + 1];
context->data[context->current_line * context->rowstride + i * 3 + 2] = context->header->palette[h * 3 + 2];
}
if(context->updated_func)
context->updated_func(context->pixbuf, 0, context->current_line, context->width, 1, context->user_data);
context->current_line++;
if(context->current_line == context->height) {
context->current_task = PCX_TASK_DONE;
return TRUE;
}
}
return TRUE;
}
static gboolean
pcx_increment_load_data_4(struct pcx_context *context)
{
guint i;
guchar *planes[1];
guint line_bytes;
planes[0] = context->line;
while(read_scanline_data(context->buf, context->buf_pos, planes, 1, context->num_planes, context->bytesperline, &line_bytes)) {
pcx_chop_context_buf(context, line_bytes);
for(i = 0; i < context->width; i++) {
guchar p;
p = read_pixel_4(planes[0], i) & 0xf;
context->data[context->current_line * context->rowstride + i * 3 + 0] = context->header->palette[p * 3 + 0];
context->data[context->current_line * context->rowstride + i * 3 + 1] = context->header->palette[p * 3 + 1];
context->data[context->current_line * context->rowstride + i * 3 + 2] = context->header->palette[p * 3 + 2];
}
if(context->updated_func)
context->updated_func(context->pixbuf, 0, context->current_line, context->width, 1, context->user_data);
context->current_line++;
if(context->current_line == context->height) {
context->current_task = PCX_TASK_DONE;
return TRUE;
}
}
return TRUE;
}
/*
* for loading 8-bit pcx images, we keep a buffer containing
* each pixel's palette number; once we've loaded each scanline,
* we wait for loading to stop and call pcx_load_palette_8,
* which finds the palette at the end of the pcx data and sets the
* RGB data.
*/
static gboolean
pcx_increment_load_data_8(struct pcx_context *context)
{
guint i;
guchar *planes[1];
guint line_bytes;
planes[0] = context->line;
while(read_scanline_data(context->buf, context->buf_pos, planes, 1, context->num_planes, context->bytesperline, &line_bytes)) {
pcx_chop_context_buf(context, line_bytes);
for(i = 0; i < context->width; i++)
context->p_data[context->current_line * context->width + i + 0] = planes[0][i];
context->current_line++;
if(context->current_line == context->height) {
context->current_task = PCX_TASK_LOAD_PALETTE;
return TRUE;
}
}
return TRUE;
}
/*
* read the palette and set the RGB data
*/
static gboolean
pcx_load_palette_8(struct pcx_context *context)
{
guint i, j;
if(context->current_line < context->height)
return FALSE;
if(context->buf_pos >= 769) {
guchar *palette = context->buf + (context->buf_pos - 769);
if(palette[0] == 12) {
palette++;
for(i = 0; i < context->height; i++) {
for(j = 0; j < context->width; j++) {
context->data[i * context->rowstride + j * 3 + 0] = palette[(context->p_data[i * context->width + j]) * 3 + 0];
context->data[i * context->rowstride + j * 3 + 1] = palette[(context->p_data[i * context->width + j]) * 3 + 1];
context->data[i * context->rowstride + j * 3 + 2] = palette[(context->p_data[i * context->width + j]) * 3 + 2];
}
if(context->updated_func)
context->updated_func(context->pixbuf, 0, context->current_line, context->width, 1, context->user_data);
}
#ifdef PCX_DEBUG
g_print("read palette\n");
#endif
context->current_task = PCX_TASK_DONE;
return TRUE;
} else {
#ifdef PCX_DEBUG
g_print("this ain't a palette\n");
#endif
return FALSE;
}
}
return FALSE;
}
/*
* in 24-bit images, each scanline has three color planes
* for red, green, and blue, respectively.
*/
static gboolean
pcx_increment_load_data_24(struct pcx_context *context)
{
guint i;
guchar *planes[3];
guint line_bytes;
planes[0] = context->line;
planes[1] = planes[0] + context->bytesperline;
planes[2] = planes[1] + context->bytesperline;
while(read_scanline_data(context->buf, context->buf_pos, planes, 3, context->num_planes, context->bytesperline, &line_bytes)) {
pcx_chop_context_buf(context, line_bytes);
for(i = 0; i < context->width; i++) {
context->data[context->current_line * context->rowstride + i * 3 + 0] = planes[0][i];
context->data[context->current_line * context->rowstride + i * 3 + 1] = planes[1][i];
context->data[context->current_line * context->rowstride + i * 3 + 2] = planes[2][i];
}
if(context->updated_func)
context->updated_func(context->pixbuf, 0, context->current_line, context->width, 1, context->user_data);
context->current_line++;
if(context->current_line == context->height) {
context->current_task = PCX_TASK_DONE;
return TRUE;
}
}
return TRUE;
}
static gboolean
gdk_pixbuf__pcx_load_increment(gpointer data, const guchar *buf, guint size,
GError **error)
{
struct pcx_context *context = (struct pcx_context *)data;
struct pcx_header *header;
guint i;
gboolean retval = TRUE;
/* if context's buf isn't large enough to hold its current data plus the passed buf, increase its size */
if(context->buf_pos + size > context->buf_size) {
if(!pcx_resize_context_buf(context, sizeof(guchar) * (context->buf_pos + size))) {
g_set_error(error, GDK_PIXBUF_ERROR, GDK_PIXBUF_ERROR_INSUFFICIENT_MEMORY, _("Couldn't allocate memory for context buffer"));
return FALSE;
}
}
for(i = 0; i < size; i++)
context->buf[context->buf_pos++] = buf[i];
if(context->current_task == PCX_TASK_LOAD_HEADER) {
if(!context->header_loaded && context->buf_pos > sizeof(struct pcx_header)) { /* set header */
gint width, height;
memcpy(context->header, context->buf, sizeof(struct pcx_header));
pcx_chop_context_buf(context, sizeof(struct pcx_header));
header = context->header;
/* convert the multi-byte header variables that will be used */
header->xmin = GINT16_FROM_LE(header->xmin);
header->ymin = GINT16_FROM_LE(header->ymin);
header->xmax = GINT16_FROM_LE(header->xmax);
header->ymax = GINT16_FROM_LE(header->ymax);
header->bytesperline = GUINT16_FROM_LE(header->bytesperline);
#ifdef PCX_DEBUG
g_print ("Manufacturer %d\n"
"Version %d\n"
"Encoding %d\n"
"Bits/Pixel %d\n"
"Planes %d\n"
"Palette %d\n",
header->manufacturer, header->version,
header->encoding, header->bitsperpixel,
header->colorplanes, header->palettetype);
#endif
context->header_loaded = TRUE;
fill_pcx_context(context);
width = context->width;
height = context->height;
if(width <= 0 || height <= 0) {
g_set_error(error, GDK_PIXBUF_ERROR, GDK_PIXBUF_ERROR_CORRUPT_IMAGE, _("Image has invalid width and/or height"));
return FALSE;
}
if(context->size_func)
context->size_func(&width, &height, context->user_data);
switch(context->bpp) {
default:
g_set_error(error, GDK_PIXBUF_ERROR, GDK_PIXBUF_ERROR_UNKNOWN_TYPE, _("Image has unsupported bpp"));
return FALSE;
break;
case 1:
if(context->num_planes < 1 || context->num_planes > 4) {
g_set_error(error, GDK_PIXBUF_ERROR, GDK_PIXBUF_ERROR_UNKNOWN_TYPE, _("Image has unsupported number of 1-bit planes"));
return FALSE;
}
break;
case 2:
case 4:
case 8:
if(context->num_planes != 1) {
g_set_error(error, GDK_PIXBUF_ERROR, GDK_PIXBUF_ERROR_UNKNOWN_TYPE, _("Image has unsupported number of %d-bit planes"), context->bpp);
return FALSE;
}
break;
case 24:
break; /* context's bpp is set to 24 if there are three 8-bit planes */
}
#ifdef PCX_DEBUG
g_print("io-pcx: header loaded\n");
g_print("bpp: %u\n", context->bpp);
g_print("dimensions: %ux%u\n", context->width, context->height);
#endif
context->pixbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB, FALSE, 8, context->width, context->height);
if(!context->pixbuf) {
g_set_error(error, GDK_PIXBUF_ERROR, GDK_PIXBUF_ERROR_INSUFFICIENT_MEMORY, _("Couldn't create new pixbuf"));
return FALSE;
}
context->data = gdk_pixbuf_get_pixels(context->pixbuf);
context->rowstride = gdk_pixbuf_get_rowstride(context->pixbuf);
context->line = g_try_malloc(sizeof(guchar) * context->bytesperline * context->num_planes);
if(!context->line) {
g_set_error(error, GDK_PIXBUF_ERROR, GDK_PIXBUF_ERROR_INSUFFICIENT_MEMORY, _("Couldn't allocate memory for line data"));
return FALSE;
}
if(context->bpp == 8) {
context->p_data = g_try_malloc(sizeof(guchar) * context->width * context->height);
if(!context->p_data) {
g_set_error(error, GDK_PIXBUF_ERROR, GDK_PIXBUF_ERROR_INSUFFICIENT_MEMORY, _("Couldn't allocate memory for paletted data"));
return FALSE;
}
}
if(context->prepared_func)
context->prepared_func(context->pixbuf, NULL, context->user_data);
context->current_task = PCX_TASK_LOAD_DATA;
}
retval = TRUE;
}
if(context->current_task == PCX_TASK_LOAD_DATA) {
switch(context->bpp) {
default:
g_set_error(error, GDK_PIXBUF_ERROR, GDK_PIXBUF_ERROR_UNKNOWN_TYPE, _("Image has unsupported bpp"));
retval = FALSE;
break;
case 1:
retval = pcx_increment_load_data_1(context);
break;
case 2:
retval = pcx_increment_load_data_2(context);
break;
case 4:
retval = pcx_increment_load_data_4(context);
break;
case 8:
retval = pcx_increment_load_data_8(context);
break;
case 24:
retval = pcx_increment_load_data_24(context);
break;
}
}
return retval;
}
static gboolean
gdk_pixbuf__pcx_stop_load(gpointer data, GError **error)
{
struct pcx_context *context = (struct pcx_context *)data;
if(context->current_line != context->height) {
g_set_error(error, GDK_PIXBUF_ERROR, GDK_PIXBUF_ERROR_FAILED, _("Didn't get all lines of PCX image"));
free_pcx_context(context, FALSE);
return FALSE;
}
if(context->current_task == PCX_TASK_LOAD_PALETTE) {
if(!pcx_load_palette_8(context)) {
g_set_error(error, GDK_PIXBUF_ERROR, GDK_PIXBUF_ERROR_FAILED, _("No palette found at end of PCX data"));
free_pcx_context(context, FALSE);
return FALSE;
}
}
free_pcx_context(context, FALSE);
return TRUE;
}
void
MODULE_ENTRY (pcx, fill_vtable) (GdkPixbufModule *module)
{
module->begin_load = gdk_pixbuf__pcx_begin_load;
module->stop_load = gdk_pixbuf__pcx_stop_load;
module->load_increment = gdk_pixbuf__pcx_load_increment;
}
void
MODULE_ENTRY (pcx, fill_info) (GdkPixbufFormat *info)
{
static GdkPixbufModulePattern signature[] = {
{ "\x0a \x01", NULL, 100 },
{ "\x0a\x02\x01", NULL, 100 },
{ "\x0a\x03\x01", NULL, 100 },
{ "\x0a\x04\x01", NULL, 100 },
{ "\x0a\x05\x01", NULL, 100 },
{ NULL, NULL, 0 }
};
static gchar *mime_types[] = {
"image/x-pcx",
NULL,
};
static gchar *extensions[] = {
"pcx",
NULL,
};
info->name = "pcx";
info->signature = signature;
info->description = N_("The PCX image format");
info->mime_types = mime_types;
info->extensions = extensions;
info->flags = 0;
}

3
gdk-pixbuf/pixbufloader_pcx.def Normal file
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EXPORTS
fill_vtable
fill_info