Commit bcf604ef authored by Jonathan Blandford's avatar Jonathan Blandford Committed by Jonathan Blandford

Added another loader from Arjan to handle .ico files. Cool.

1999-11-29  Jonathan Blandford  <jrb@redhat.com>

        * src/Makefile.am (ICO_LIB): Added another loader from Arjan to
	handle .ico files.  Cool.
parent d3d54550
......@@ -13,6 +13,8 @@ endif
GIF_LIB = libpixbuf-gif.la
ICO_LIB = libpixbuf-ico.la
RAS_LIB = libpixbuf-ras.la
if HAVE_TIFF
......@@ -29,6 +31,7 @@ libexec_LTLIBRARIES = \
$(PNG_LIB) \
$(JPEG_LIB) \
$(GIF_LIB) \
$(ICO_LIB) \
$(RAS_LIB) \
$(XPM_LIB) \
$(TIFF_LIB) \
......@@ -104,6 +107,13 @@ libpixbuf_gif_la_SOURCES = io-gif.c
libpixbuf_gif_la_LDFLAGS = -avoid-version -module
libpixbuf_gif_la_LIBADD =
#
# The ICO loader
#
libpixbuf_ico_la_SOURCES = io-ico.c
libpixbuf_ico_la_LDFLAGS = -avoid-version -module
libpixbuf_ico_la_LIBADD =
#
# The RAS loader
#
......
......@@ -136,6 +136,23 @@ pixbuf_check_sunras (guchar *buffer, int size)
return TRUE;
}
static gboolean
pixbuf_check_ico (guchar *buffer, int size)
{
/* Note that this may cause false positives, but .ico's don't
have a magic number.*/
if (size < 6)
return FALSE;
if (buffer [0] != 0x0 ||
buffer [1] != 0x0 ||
buffer [2] != 0x1 ||
buffer [3] != 0x0 ||
buffer [5] != 0x0 )
return FALSE;
return TRUE;
}
static gboolean
pixbuf_check_bmp (guchar *buffer, int size)
......@@ -159,6 +176,7 @@ GdkPixbufModule file_formats [] = {
{ "xpm", pixbuf_check_xpm, NULL, NULL, NULL, NULL, NULL, NULL },
{ "pnm", pixbuf_check_pnm, NULL, NULL, NULL, NULL, NULL, NULL },
{ "ras", pixbuf_check_sunras, NULL, NULL, NULL, NULL, NULL, NULL },
{ "ico", pixbuf_check_ico, NULL, NULL, NULL, NULL, NULL, NULL },
{ "bmp", pixbuf_check_bmp, NULL, NULL, NULL, NULL, NULL, NULL },
{ NULL, NULL, NULL, NULL, NULL, NULL, NULL }
};
......
/* GdkPixbuf library - Windows Bitmap image loader
*
* Copyright (C) 1999 The Free Software Foundation
*
* Authors: Arjan van de Ven <arjan@fenrus.demon.nl>
* Federico Mena-Quintero <federico@gimp.org>
*
* Based on io-bmp.c
*
* 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.
*/
/*
Icons are just like BMP's, except for the header.
Known bugs:
* bi-tonal files aren't tested
*/
#include <config.h>
#include <stdio.h>
#include <unistd.h>
#include <sys/mman.h>
#include <glib.h>
#include <gdk/gdk.h>
#include <gtk/gtk.h>
#include "gdk-pixbuf/gdk-pixbuf.h"
#include "gdk-pixbuf/gdk-pixbuf-io.h"
struct headerpair {
guint width;
guint height;
guint depth;
guint Negative; /* Negative = 1 -> top down BMP,
Negative = 0 -> bottom up BMP */
};
/*
These structures are actually dummies. These are according to
the "Windows API reference guide volume II" as written by Borland,
but GCC fiddles with the alignment of the internal members.
*/
struct BitmapFileHeader {
gushort bfType;
guint bfSize;
guint reserverd;
guint bfOffbits;
};
struct BitmapInfoHeader {
guint biSize;
guint biWidth;
guint biHeight;
gushort biPlanes;
gushort biBitCount;
guint biCompression;
guint biSizeImage;
guint biXPelsPerMeter;
guint biYPelsPerMeter;
guint biClrUsed;
guint biClrImportant;
};
static void DumpBIH(unsigned char *BIH)
{ /* For debugging */
printf("biSize = %i \n",
(BIH[3] << 24) + (BIH[2] << 16) + (BIH[1] << 8) + (BIH[0]));
printf("biWidth = %i \n",
(BIH[7] << 24) + (BIH[6] << 16) + (BIH[5] << 8) + (BIH[4]));
printf("biHeight = %i \n",
(BIH[11] << 24) + (BIH[10] << 16) + (BIH[9] << 8) +
(BIH[8]));
printf("biPlanes = %i \n", (BIH[13] << 8) + (BIH[12]));
printf("biBitCount = %i \n", (BIH[15] << 8) + (BIH[14]));
printf("biCompress = %i \n",
(BIH[19] << 24) + (BIH[18] << 16) + (BIH[17] << 8) +
(BIH[16]));
printf("biSizeImage = %i \n",
(BIH[23] << 24) + (BIH[22] << 16) + (BIH[21] << 8) +
(BIH[20]));
printf("biXPels = %i \n",
(BIH[27] << 24) + (BIH[26] << 16) + (BIH[25] << 8) +
(BIH[24]));
printf("biYPels = %i \n",
(BIH[31] << 24) + (BIH[30] << 16) + (BIH[29] << 8) +
(BIH[28]));
printf("biClrUsed = %i \n",
(BIH[35] << 24) + (BIH[34] << 16) + (BIH[33] << 8) +
(BIH[32]));
printf("biClrImprtnt= %i \n",
(BIH[39] << 24) + (BIH[38] << 16) + (BIH[37] << 8) +
(BIH[36]));
}
/*
This does a byte-order swap. Does glib have something like
be32_to_cpu() ??
*/
static unsigned int le32_to_cpu(guint i)
{
unsigned int i2;
return i2;
}
/*
Destroy notification function for the libart pixbuf
*/
static void free_buffer(gpointer user_data, gpointer data)
{
free(data);
}
/* Progressive loading */
struct ico_progressive_state {
ModulePreparedNotifyFunc prepared_func;
ModuleUpdatedNotifyFunc updated_func;
gpointer user_data;
gint HeaderSize; /* The size of the header-part (incl colormap) */
guchar *HeaderBuf; /* The buffer for the header (incl colormap) */
gint BytesInHeaderBuf; /* The size of the allocated HeaderBuf */
gint HeaderDone; /* The nr of bytes actually in HeaderBuf */
gint LineWidth; /* The width of a line in bytes */
guchar *LineBuf; /* Buffer for 1 line */
gint LineDone; /* # of bytes in LineBuf */
gint Lines; /* # of finished lines */
gint Type; /*
24 = RGB
8 = 8 bit colormapped
1 = 1 bit bitonal
*/
struct headerpair Header; /* Decoded (BE->CPU) header */
gint DIBoffset;
gint ImageScore;
GdkPixbuf *pixbuf; /* Our "target" */
};
gpointer
image_begin_load(ModulePreparedNotifyFunc prepared_func,
ModuleUpdatedNotifyFunc updated_func, gpointer user_data);
void image_stop_load(gpointer data);
gboolean image_load_increment(gpointer data, guchar * buf, guint size);
/* Shared library entry point */
GdkPixbuf *image_load(FILE * f)
{
guchar *membuf;
size_t length;
struct ico_progressive_state *State;
int fd;
GdkPixbuf *pb;
State = image_begin_load(NULL, NULL, NULL);
membuf = g_malloc(4096);
g_assert(membuf != NULL);
while (feof(f) == 0) {
length = fread(membuf, 1, 4096, f);
if (length > 0)
image_load_increment(State, membuf, length);
}
g_free(membuf);
if (State->pixbuf != NULL)
gdk_pixbuf_ref(State->pixbuf);
pb = State->pixbuf;
image_stop_load(State);
return State->pixbuf;
}
static void DecodeHeader(guchar *Data, gint Bytes,
struct ico_progressive_state *State)
{
/* For ICO's we have to be very clever. There are multiple images possible
in an .ICO. For now, we select (in order of priority):
1) The one with the highest number of colors
2) The largest one
*/
gint IconCount = 0; /* The number of icon-versions in the file */
guchar *BIH; /* The DIB for the used icon */
guchar *Ptr;
gint I;
/* Step 1: The ICO header */
IconCount = (Data[5] << 8) + (Data[4]);
printf("There are %i icons in this file \n",IconCount);
State->HeaderSize = 6 + IconCount*16;
if (State->HeaderSize>State->BytesInHeaderBuf) {
State->HeaderBuf=g_realloc(State->HeaderBuf,State->HeaderSize);
State->BytesInHeaderBuf = State->HeaderSize;
}
if (Bytes < State->HeaderSize)
return;
/* We now have all the "short-specs" of the versions
So we iterate through them and select the best one */
State->ImageScore = 0;
State->DIBoffset = 0;
Ptr = Data + 6;
for (I=0;I<IconCount;I++) {
int ThisWidth, ThisHeight,ThisColors;
int ThisScore;
ThisWidth = Ptr[0];
ThisHeight = Ptr[1];
ThisColors = (Ptr[2]);
if (ThisColors==0)
ThisColors=256; /* Yes, this is in the spec */
printf("Option: %ix%ix%i ",ThisWidth,ThisHeight,ThisColors);
ThisScore = ThisColors*1024+ThisWidth*ThisHeight;
if (ThisScore>State->ImageScore) {
State->ImageScore = ThisScore;
State->DIBoffset = (Ptr[15]<<24)+(Ptr[14]<<16)+
(Ptr[13]<<8) + (Ptr[12]);
printf("*");
}
printf("\n");
Ptr += 16;
}
/* We now have a winner, pointed to in State->DIBoffset,
so we know how many bytes are in the "header" part. */
State->HeaderSize = State->DIBoffset + 40; /* 40 = sizeof(InfoHeader) */
if (State->HeaderSize>State->BytesInHeaderBuf) {
State->HeaderBuf=g_realloc(State->HeaderBuf,State->HeaderSize);
State->BytesInHeaderBuf = State->HeaderSize;
}
if (Bytes<State->HeaderSize)
return;
BIH = Data+State->DIBoffset;
/* DumpBIH(BIH);*/
/* Add the palette to the headersize */
State->Header.width =
(BIH[7] << 24) + (BIH[6] << 16) + (BIH[5] << 8) + (BIH[4]);
State->Header.height =
(BIH[11] << 24) + (BIH[10] << 16) + (BIH[9] << 8) + (BIH[8])/2;
/* /2 because the BIH height includes the transparency mask */
State->Header.depth = (BIH[15] << 8) + (BIH[14]);;
State->Type = State->Header.depth; /* This may be less trivial someday */
if (State->Lines>State->Header.height)
State->Type = 1;
I =(BIH[35] << 24) + (BIH[34] << 16) + (BIH[33] << 8) + (BIH[32]);
if ((I==0)&&(State->Type==1))
I = 2*4;
if ((I==0)&&(State->Type==4))
I = 16*4;
if ((I==0)&&(State->Type==8))
I = 256*4;
State->HeaderSize+=I;
if (State->HeaderSize>State->BytesInHeaderBuf) {
State->HeaderBuf=g_realloc(State->HeaderBuf,State->HeaderSize);
State->BytesInHeaderBuf = State->HeaderSize;
}
if (Bytes < State->HeaderSize)
return;
if ((BIH[16] != 0) || (BIH[17] != 0) || (BIH[18] != 0)
|| (BIH[19] != 0)) {
g_assert(0); /* Compressed icons aren't allowed */
}
if (State->Header.height < 0) {
State->Header.height = -State->Header.height;
State->Header.Negative = 1;
}
if (State->Header.width < 0) {
State->Header.width = -State->Header.width;
State->Header.Negative = 0;
}
if (State->Type == 24)
State->LineWidth = State->Header.width * 3;
if (State->Type == 8)
State->LineWidth = State->Header.width * 1;
if (State->Type == 4) {
State->LineWidth = State->Header.width/2;
if ((State->Header.width & 1) != 0)
State->LineWidth++;
}
if (State->Type == 1) {
State->LineWidth = State->Header.width / 8;
if ((State->Header.width & 7) != 0)
State->LineWidth++;
}
/* Pad to a 32 bit boundary */
if (((State->LineWidth % 4) > 0))
State->LineWidth = (State->LineWidth / 3) * 3 + 3;
if (State->LineBuf == NULL)
State->LineBuf = g_malloc(State->LineWidth);
g_assert(State->LineBuf != NULL);
if (State->pixbuf == NULL) {
State->pixbuf =
gdk_pixbuf_new(ART_PIX_RGB, TRUE, 8,
(gint) State->Header.width,
(gint) State->Header.height);
if (State->prepared_func != NULL)
/* Notify the client that we are ready to go */
(*State->prepared_func) (State->pixbuf,
State->user_data);
}
}
/*
* func - called when we have pixmap created (but no image data)
* user_data - passed as arg 1 to func
* return context (opaque to user)
*/
gpointer
image_begin_load(ModulePreparedNotifyFunc prepared_func,
ModuleUpdatedNotifyFunc updated_func, gpointer user_data)
{
struct ico_progressive_state *context;
context = g_new0(struct ico_progressive_state, 1);
context->prepared_func = prepared_func;
context->updated_func = updated_func;
context->user_data = user_data;
context->HeaderSize = 54;
context->HeaderBuf = g_malloc(14 + 40 + 4*256 + 512);
/* 4*256 for the colormap */
context->BytesInHeaderBuf = 14 + 40 + 4*256 + 512 ;
context->HeaderDone = 0;
context->LineWidth = 0;
context->LineBuf = NULL;
context->LineDone = 0;
context->Lines = 0;
context->Type = 0;
memset(&context->Header, 0, sizeof(struct headerpair));
context->pixbuf = NULL;
return (gpointer) context;
}
/*
* context - returned from image_begin_load
*
* free context, unref gdk_pixbuf
*/
void image_stop_load(gpointer data)
{
struct ico_progressive_state *context =
(struct ico_progressive_state *) data;
g_return_if_fail(context != NULL);
if (context->LineBuf != NULL)
g_free(context->LineBuf);
context->LineBuf = NULL;
if (context->HeaderBuf != NULL)
g_free(context->HeaderBuf);
if (context->pixbuf)
gdk_pixbuf_unref(context->pixbuf);
g_free(context);
}
static void OneLine24(struct ico_progressive_state *context)
{
gint X;
guchar *Pixels;
X = 0;
if (context->Header.Negative == 0)
Pixels = context->pixbuf->art_pixbuf->pixels +
gdk_pixbuf_get_rowstride(context->pixbuf) *
(context->Header.height - context->Lines - 1);
else
Pixels = context->pixbuf->art_pixbuf->pixels +
gdk_pixbuf_get_rowstride(context->pixbuf) *
context->Lines;
while (X < context->Header.width) {
Pixels[X * 4 + 0] = context->LineBuf[X * 3 + 2];
Pixels[X * 4 + 1] = context->LineBuf[X * 3 + 1];
Pixels[X * 4 + 2] = context->LineBuf[X * 3 + 0];
X++;
}
}
static void OneLine8(struct ico_progressive_state *context)
{
gint X;
guchar *Pixels;
X = 0;
if (context->Header.Negative == 0)
Pixels = context->pixbuf->art_pixbuf->pixels +
gdk_pixbuf_get_rowstride(context->pixbuf) *
(context->Header.height - context->Lines - 1);
else
Pixels = context->pixbuf->art_pixbuf->pixels +
gdk_pixbuf_get_rowstride(context->pixbuf) *
context->Lines;
while (X < context->Header.width) {
/* The joys of having a BGR byteorder */
Pixels[X * 4 + 0] =
context->HeaderBuf[4 * context->LineBuf[X] + 42+context->DIBoffset];
Pixels[X * 4 + 1] =
context->HeaderBuf[4 * context->LineBuf[X] + 41+context->DIBoffset];
Pixels[X * 4 + 2] =
context->HeaderBuf[4 * context->LineBuf[X] + 40+context->DIBoffset];
X++;
}
}
static void OneLine4(struct ico_progressive_state *context)
{
gint X;
guchar *Pixels;
X = 0;
if (context->Header.Negative == 0)
Pixels = context->pixbuf->art_pixbuf->pixels +
gdk_pixbuf_get_rowstride(context->pixbuf) *
(context->Header.height - context->Lines - 1);
else
Pixels = context->pixbuf->art_pixbuf->pixels +
gdk_pixbuf_get_rowstride(context->pixbuf) *
context->Lines;
while (X < context->Header.width) {
guchar Pix;
Pix = context->LineBuf[X/2];
Pixels[X * 4 + 0] =
context->HeaderBuf[4 * (Pix>>4) + 42+context->DIBoffset];
Pixels[X * 4 + 1] =
context->HeaderBuf[4 * (Pix>>4) + 41+context->DIBoffset];
Pixels[X * 4 + 2] =
context->HeaderBuf[4 * (Pix>>4) + 40+context->DIBoffset];
X++;
if (X<context->Header.width) {
/* Handle the other 4 bit pixel only when there is one */
Pixels[X * 4 + 0] =
context->HeaderBuf[4 * (Pix&15) + 42+context->DIBoffset];
Pixels[X * 4 + 1] =
context->HeaderBuf[4 * (Pix&15) + 41+context->DIBoffset];
Pixels[X * 4 + 2] =
context->HeaderBuf[4 * (Pix&15) + 40+context->DIBoffset];
X++;
}
}
}
static void OneLine1(struct ico_progressive_state *context)
{
gint X;
guchar *Pixels;
X = 0;
if (context->Header.Negative == 0)
Pixels = context->pixbuf->art_pixbuf->pixels +
gdk_pixbuf_get_rowstride(context->pixbuf) *
(context->Header.height - context->Lines - 1);
else
Pixels = context->pixbuf->art_pixbuf->pixels +
gdk_pixbuf_get_rowstride(context->pixbuf) *
context->Lines;
while (X < context->Header.width) {
int Bit;
Bit = (context->LineBuf[X / 8]) >> (7 - (X & 7));
Bit = Bit & 1;
/* The joys of having a BGR byteorder */
Pixels[X * 4 + 0] = context->HeaderBuf[Bit + 32];
Pixels[X * 4 + 1] = context->HeaderBuf[Bit + 2 + 32];
Pixels[X * 4 + 2] = context->HeaderBuf[Bit + 4 + 32];
X++;
}
}
static void OneLineTransp(struct ico_progressive_state *context)
{
gint X;
guchar *Pixels;
X = 0;
if (context->Header.Negative == 0)
Pixels = context->pixbuf->art_pixbuf->pixels +
gdk_pixbuf_get_rowstride(context->pixbuf) *
(2*context->Header.height - context->Lines - 1);
else
Pixels = context->pixbuf->art_pixbuf->pixels +
gdk_pixbuf_get_rowstride(context->pixbuf) *
(context->Lines-context->Header.height);
while (X < context->Header.width) {
int Bit;
Bit = (context->LineBuf[X / 8]) >> (7 - (X & 7));
Bit = Bit & 1;
/* The joys of having a BGR byteorder */
Pixels[X * 4 + 3] = 255-Bit*255;
#if 0
if (Bit){
Pixels[X*4+0] = 255;
Pixels[X*4+1] = 255;
Pixels[X*4+2] = 255;
} else {
Pixels[X*4+0] = 0;
Pixels[X*4+1] = 0;
Pixels[X*4+2] = 0;
}
#endif
X++;
}
}
static void OneLine(struct ico_progressive_state *context)
{
context->LineDone = 0;
if (context->Lines >= context->Header.height*2) {
return;
}
if (context->Lines <context->Header.height) {
if (context->Type == 24)
OneLine24(context);
if (context->Type == 8)
OneLine8(context);
if (context->Type == 4)
OneLine4(context);
if (context->Type == 1)
OneLine1(context);
} else
{
OneLineTransp(context);
}
context->Lines++;
if (context->Lines>=context->Header.height) {
context->Type = 1;
context->LineWidth = context->Header.width / 8;
if ((context->Header.width & 7) != 0)
context->LineWidth++;
/* Pad to a 32 bit boundary */
if (((context->LineWidth % 4) > 0))
context->LineWidth = (context->LineWidth / 4) * 4 + 4;
}
if (context->updated_func != NULL) {
(*context->updated_func) (context->pixbuf,
context->user_data,
0,
context->Lines,
context->Header.width,
context->Header.height);
}
}
/*
* context - from image_begin_load
* buf - new image data
* size - length of new image data
*
* append image data onto inrecrementally built output image
*/
gboolean image_load_increment(gpointer data, guchar * buf, guint size)
{
struct ico_progressive_state *context =
(struct ico_progressive_state *) data;
gint BytesToCopy;
while (size > 0) {
printf("Y=%i C=%i H=%i\n",context->Lines,context->Type,context->Header.height);
g_assert(context->LineDone >= 0);
if (context->HeaderDone < context->HeaderSize) { /* We still
have headerbytes to do */
BytesToCopy =
context->HeaderSize - context->HeaderDone;
if (BytesToCopy > size)
BytesToCopy = size;
memcpy(context->HeaderBuf + context->HeaderDone,
buf, BytesToCopy);
size -= BytesToCopy;
buf += BytesToCopy;
context->HeaderDone += BytesToCopy;
} else
{
BytesToCopy =
context->LineWidth - context->LineDone;
if (BytesToCopy > size)
BytesToCopy = size;
if (BytesToCopy > 0) {