gtk/gdk-pixbuf/io-ico.c
Havoc Pennington 7a4c689387 Some updates
2000-10-18  Havoc Pennington  <hp@redhat.com>

	* gtk/gtk-sections.txt: Some updates

	* gdk/gdk-sections.txt: remove GdkPixbufAlphaMode

	* gdk-pixbuf/gdk-pixbuf-sections.txt: Add new API, remove
	GdkPixbufClass/GdkAnimationClass since those are private

	* gdk-pixbuf/Makefile.am (IGNORE_HFILES): ignore more headers

2000-10-18  Havoc Pennington  <hp@redhat.com>

	* gtk/gtktextiter.c (gtk_text_iter_forward_to_newline): Fix a bug
	where any number of empty lines would get skipped

	* gtk/gtktextiter.h: Remove padding from GtkTextIter; live on the
	edge.

	* gtk/gtktextiter.c (gtk_text_iter_make_surreal): enhance the
	warning about invalid iterators (explain more thoroughly)
	(gtk_text_iter_in_region): rename gtk_text_iter_in_range

	* gtk/gtktextview.c (FOCUS_EDGE_WIDTH): Make focus rectangle less
	big

	* demos/*.c: Add error handling

	* gtk/gtktextbuffer.c: don't modify const iterators

	* gtk/gdk-pixbuf-loader.c: Add full error handling here

	* gtk/gtkimage.c (gtk_image_set_from_file): ignore errors
	on file load

	* gtk/gtkiconfactory.c: Update to reflect addition of error
	handling to gdk-pixbuf loaders

2000-10-16  Havoc Pennington  <hp@redhat.com>

	* gdk-pixbuf-io.c (gdk_pixbuf_get_module)
	(gdk_pixbuf_get_named_module) (gdk_pixbuf_load_module):
	add error reporting here also

	* make-inline-pixbuf.c (main): use GError

	* io-xpm.c: include unistd.h

	* gdk-pixbuf-util.c: include string.h

	* io-*.c: add error reporting

	* gdk-pixbuf-animation.c (gdk_pixbuf_animation_new_from_file): add
	error reporting

	* gdk-pixbuf-io.c (gdk_pixbuf_new_from_file): Add error reporting

	* gdk-pixbuf-io.h: Add GError** to load_increment and load
	methods

	* gdk-pixbuf-io.c (gdk_pixbuf_save) (gdk_pixbuf_savev): return
	a G_FILE_ERROR if we fail to write or close the file.

	* gdk-pixbuf.h: remove GDK_PIXBUF_ERROR_IO, instead we'll use
	G_FILE_ERROR_*. Rename enum to GdkPixbufError, properly following
	the GError naming rules. Add GError** to load functions.
2000-10-18 18:42:54 +00:00

702 lines
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/* GdkPixbuf library - Windows Icon/Cursor 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 Lesser 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser 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.
*/
#undef DUMPBIH
/*
Icons are just like BMP's, except for the header.
Known bugs:
* bi-tonal files aren't tested
*/
#include <config.h>
#include <stdio.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <string.h>
#include "gdk-pixbuf-private.h"
#include "gdk-pixbuf-io.h"
/*
These structures are actually dummies. These are according to
the "Windows API reference guide volume II" as written by
Borland International, 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;
};
#ifdef DUMPBIH
/*
DumpBIH printf's the values in a BitmapInfoHeader to the screen, for
debugging purposes.
*/
static void DumpBIH(unsigned char *BIH)
{
printf("biSize = %i \n",
(int)(BIH[3] << 24) + (BIH[2] << 16) + (BIH[1] << 8) + (BIH[0]));
printf("biWidth = %i \n",
(int)(BIH[7] << 24) + (BIH[6] << 16) + (BIH[5] << 8) + (BIH[4]));
printf("biHeight = %i \n",
(int)(BIH[11] << 24) + (BIH[10] << 16) + (BIH[9] << 8) +
(BIH[8]));
printf("biPlanes = %i \n", (int)(BIH[13] << 8) + (BIH[12]));
printf("biBitCount = %i \n", (int)(BIH[15] << 8) + (BIH[14]));
printf("biCompress = %i \n",
(int)(BIH[19] << 24) + (BIH[18] << 16) + (BIH[17] << 8) +
(BIH[16]));
printf("biSizeImage = %i \n",
(int)(BIH[23] << 24) + (BIH[22] << 16) + (BIH[21] << 8) +
(BIH[20]));
printf("biXPels = %i \n",
(int)(BIH[27] << 24) + (BIH[26] << 16) + (BIH[25] << 8) +
(BIH[24]));
printf("biYPels = %i \n",
(int)(BIH[31] << 24) + (BIH[30] << 16) + (BIH[29] << 8) +
(BIH[28]));
printf("biClrUsed = %i \n",
(int)(BIH[35] << 24) + (BIH[34] << 16) + (BIH[33] << 8) +
(BIH[32]));
printf("biClrImprtnt= %i \n",
(int)(BIH[39] << 24) + (BIH[38] << 16) + (BIH[37] << 8) +
(BIH[36]));
}
#endif
/* Progressive loading */
struct headerpair {
guint width;
guint height;
guint depth;
guint Negative; /* Negative = 1 -> top down BMP,
Negative = 0 -> bottom up BMP */
};
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
gdk_pixbuf__ico_image_begin_load(ModulePreparedNotifyFunc prepared_func,
ModuleUpdatedNotifyFunc updated_func,
ModuleFrameDoneNotifyFunc frame_done_func,
ModuleAnimationDoneNotifyFunc anim_done_func,
gpointer user_data,
GError **error);
void gdk_pixbuf__ico_image_stop_load(gpointer data);
gboolean gdk_pixbuf__ico_image_load_increment(gpointer data, guchar * buf, guint size,
GError **error);
/* Shared library entry point --> Can go when generic_image_load
enters gdk-pixbuf-io */
GdkPixbuf *
gdk_pixbuf__ico_image_load(FILE * f, GError **error)
{
guchar *membuf;
size_t length;
struct ico_progressive_state *State;
GdkPixbuf *pb;
State = gdk_pixbuf__ico_image_begin_load(NULL, NULL, NULL,
NULL, NULL, error);
if (State == NULL)
return NULL;
membuf = g_malloc(4096);
g_assert(membuf != NULL);
while (feof(f) == 0) {
length = fread(membuf, 1, 4096, f);
if (length > 0)
if (!gdk_pixbuf__ico_image_load_increment(State, membuf, length,
error)) {
gdk_pixbuf__ico_image_stop_load (State);
return NULL;
}
}
g_free(membuf);
if (State->pixbuf != NULL)
gdk_pixbuf_ref(State->pixbuf);
pb = State->pixbuf;
gdk_pixbuf__ico_image_stop_load(State);
return pb;
}
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]);
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, ugh */
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]);
}
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;
#ifdef DUMPBIH
DumpBIH(BIH);
#endif
/* Add the palette to the headersize */
State->Header.width =
(int)(BIH[7] << 24) + (BIH[6] << 16) + (BIH[5] << 8) + (BIH[4]);
State->Header.height =
(int)(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;
if (State->Lines>=State->Header.height)
State->Type = 1; /* The transparency mask is 1 bpp */
/* Determine the palette size. If the header indicates 0, it
is actually the maximum for the bpp. You have to love the
guys who made the spec. */
I = (int)(BIH[35] << 24) + (BIH[34] << 16) + (BIH[33] << 8) + (BIH[32]);
I = I*4;
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 */
}
/* Negative heights mean top-down pixel-order */
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;
}
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+1)/2;
}
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 / 4) * 4 + 4;
if (State->LineBuf == NULL)
State->LineBuf = g_malloc(State->LineWidth);
g_assert(State->LineBuf != NULL);
if (State->pixbuf == NULL) {
State->pixbuf =
gdk_pixbuf_new(GDK_COLORSPACE_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
gdk_pixbuf__ico_image_begin_load(ModulePreparedNotifyFunc prepared_func,
ModuleUpdatedNotifyFunc updated_func,
ModuleFrameDoneNotifyFunc frame_done_func,
ModuleAnimationDoneNotifyFunc anim_done_func,
gpointer user_data,
GError **error)
{
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 gdk_pixbuf__ico_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->pixels +
context->pixbuf->rowstride *
(context->Header.height - context->Lines - 1));
else
Pixels = (context->pixbuf->pixels +
context->pixbuf->rowstride *
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->pixels +
context->pixbuf->rowstride *
(context->Header.height - context->Lines - 1));
else
Pixels = (context->pixbuf->pixels +
context->pixbuf->rowstride *
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->pixels +
context->pixbuf->rowstride *
(context->Header.height - context->Lines - 1));
else
Pixels = (context->pixbuf->pixels +
context->pixbuf->rowstride *
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->pixels +
context->pixbuf->rowstride *
(context->Header.height - context->Lines - 1));
else
Pixels = (context->pixbuf->pixels +
context->pixbuf->rowstride *
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] = Bit*255;
Pixels[X * 4 + 1] = Bit*255;
Pixels[X * 4 + 2] = Bit*255;
X++;
}
}
static void OneLineTransp(struct ico_progressive_state *context)
{
gint X;
guchar *Pixels;
X = 0;
if (context->Header.Negative == 0)
Pixels = (context->pixbuf->pixels +
context->pixbuf->rowstride *
(2*context->Header.height - context->Lines - 1));
else
Pixels = (context->pixbuf->pixels +
context->pixbuf->rowstride *
(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;
} else {
Pixels[X*4+0] = 0;
Pixels[X*4+1] = 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,
0,
context->Lines,
context->Header.width,
context->Header.height,
context->user_data);
}
}
/*
* context - from image_begin_load
* buf - new image data
* size - length of new image data
*
* append image data onto inrecrementally built output image
*/
gboolean
gdk_pixbuf__ico_image_load_increment(gpointer data, guchar * buf, guint size,
GError **error)
{
struct ico_progressive_state *context =
(struct ico_progressive_state *) data;
gint BytesToCopy;
while (size > 0) {
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;
memmove(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) {
memmove(context->LineBuf +
context->LineDone, buf,
BytesToCopy);
size -= BytesToCopy;
buf += BytesToCopy;
context->LineDone += BytesToCopy;
}
if ((context->LineDone >= context->LineWidth) &&
(context->LineWidth > 0))
OneLine(context);
}
if (context->HeaderDone >= 6)
DecodeHeader(context->HeaderBuf,
context->HeaderDone, context);
}
return TRUE;
}