-
-/* GdkPixbuf library - JPEG image loader
+/* GdkPixbuf library - SUNRAS image loader
*
* Copyright (C) 1999 The Free Software Foundation
*
#include <glib.h>
#include "gdk-pixbuf.h"
#include "gdk-pixbuf-io.h"
-
\f
-/* Header structure for sunras files.
+
+/*
+ Header structure for sunras files.
All values are in big-endian order on disk
*/
-
-struct rasterfile
-{
- guint magic;
- guint width;
- guint height;
- guint depth;
- guint length;
- guint type;
- guint maptype;
- guint maplength;
+
+struct rasterfile {
+ guint magic;
+ guint width;
+ guint height;
+ guint depth;
+ guint length;
+ guint type;
+ guint maptype;
+ guint maplength;
};
/*
-This does a byte-order swap. Does glib have something like
-be32_to_cpu() ??
+ This does a byte-order swap. Does glib have something like
+ be32_to_cpu() ??
*/
+
unsigned int ByteOrder(unsigned int i)
{
unsigned int i2;
- i2 = ((i&255)<<24) | (((i>>8)&255)<<16) | (((i>>16)&255)<<8)|((i>>24)&255);
- return i2;
+ i2 =
+ ((i & 255) << 24) | (((i >> 8) & 255) << 16) |
+ (((i >> 16) & 255) << 8) | ((i >> 24) & 255);
+ return i2;
}
-/* Destroy notification function for the libart pixbuf */
-static void
-free_buffer (gpointer user_data, gpointer data)
+/*
+ Destroy notification function for the libart pixbuf
+*/
+
+static void free_buffer(gpointer user_data, gpointer data)
{
- free (data);
+ free(data);
+}
+
+/*
+
+OneLineBGR does what it says: Reads one line from file.
+Note: It also changes BGR pixelorder to RGB as libart currently
+doesn't support ART_PIX_BGR.
+
+*/
+static OneLineBGR(FILE * f, guint Width, guchar * pixels, gint bpp)
+{
+ gint result, X;
+ guchar DummyByte;
+
+ result = fread(pixels, 1, Width * bpp, f);
+
+ g_assert(result == Width * bpp);
+ if (((Width * bpp) & 7) != 0) /* Not 16 bit aligned */
+ fread(&DummyByte, 1, 1, f);
+ X = 0;
+ while (X < Width) {
+ guchar Blue;
+ Blue = pixels[X * bpp];
+ pixels[X * bpp] = pixels[X * bpp + 2];
+ pixels[X * bpp + 2] = Blue;
+ X++;
+ }
}
/* Shared library entry point */
-GdkPixbuf *
-image_load (FILE *f)
+GdkPixbuf *image_load(FILE * f)
{
- gboolean failed = FALSE;
- gint i, ctype, bpp;
+ gint i, bpp, Y;
guchar *pixels;
-
struct rasterfile Header;
- i=fread(&Header,1,sizeof(Header),f);
- g_assert(i==32);
+ i = fread(&Header, 1, sizeof(Header), f);
+ g_assert(i == 32);
+
+ /* Correct the byteorder of the header here */
Header.width = ByteOrder(Header.width);
Header.height = ByteOrder(Header.height);
Header.depth = ByteOrder(Header.depth);
-
-
+ Header.length = ByteOrder(Header.length);
+ Header.type = ByteOrder(Header.type);
+ Header.maptype = ByteOrder(Header.maptype);
+ Header.maplength = ByteOrder(Header.maplength);
+
+
+ bpp = 0;
if (Header.depth == 32)
bpp = 4;
else
bpp = 3;
- pixels = (guchar*)malloc (Header.width * Header.height * bpp);
+ g_assert(bpp != 0); /* Only 24 and 32 bpp for now */
+
+ pixels = (guchar *) malloc(Header.width * Header.height * bpp);
if (!pixels) {
return NULL;
}
- fread(pixels,Header.width*bpp,Header.height,f);
-
- if (bpp==4)
- return gdk_pixbuf_new_from_data (pixels, ART_PIX_RGB, TRUE,
- Header.width, Header.height,
- Header.width * bpp,
- free_buffer, NULL);
- else
- return gdk_pixbuf_new_from_data (pixels, ART_PIX_RGB, FALSE,
- Header.width, Header.height, Header.width * bpp,
- free_buffer, NULL);
-}
-
-/* These avoid the setjmp()/longjmp() crap in libpng */
-
-typedef struct _LoadContext LoadContext;
-
-struct _LoadContext {
-
- ModulePreparedNotifyFunc notify_func;
- gpointer notify_user_data;
-
- GdkPixbuf* pixbuf;
-
- guint fatal_error_occurred : 1;
+ /*
-};
-
-gpointer
-image_begin_load (ModulePreparedNotifyFunc prepare_func,
- ModuleUpdatedNotifyFunc update_func,
- gpointer user_data)
-{
- LoadContext* lc;
-
- lc = g_new0(LoadContext, 1);
-
- lc->fatal_error_occurred = FALSE;
-
- lc->notify_func = prepare_func;
- lc->notify_user_data = user_data;
-
- return lc;
-}
+ Loop through the file, one line at a time.
+ Only BGR-style files are handled right now.
-void
-image_stop_load (gpointer context)
-{
- LoadContext* lc = context;
-
- g_return_if_fail(lc != NULL);
-
- gdk_pixbuf_unref(lc->pixbuf);
-
- g_free(lc);
-}
-
-gboolean
-image_load_increment(gpointer context, guchar *buf, guint size)
-{
- LoadContext* lc = context;
-
- g_return_val_if_fail(lc != NULL, FALSE);
+ */
+ Y = 0;
+ while (Y < Header.height) {
+ OneLineBGR(f, Header.width,
+ &pixels[Y * Header.width * bpp], bpp);
+ Y++;
+ }
- if (lc->fatal_error_occurred)
- return FALSE;
- else
- return TRUE;
+ if (bpp == 4)
+ return gdk_pixbuf_new_from_data(pixels, ART_PIX_RGB, TRUE,
+ Header.width,
+ Header.height,
+ Header.width * bpp,
+ free_buffer, NULL);
+ else
+ return gdk_pixbuf_new_from_data(pixels, ART_PIX_RGB, FALSE,
+ Header.width,
+ Header.height,
+ Header.width * bpp,
+ free_buffer, NULL);
}
-
-
projects / gtk4.git / commitdiff