mirror of
https://gitlab.gnome.org/GNOME/gtk.git
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e0fee22e78
2001-01-22 Havoc Pennington <hp@redhat.com>
* Makefile.am: Add built marshaller files to support
GdkPixbufLoader signals
* gdk-pixbuf-io.c (gdk_pixbuf_load_module): have
GDK_PIXBUF_MODULEDIR unconditionally replace the compiled-in
module location, rather than acting as a fallback, because we are
using GDK_PIXBUF_MODULEDIR to use gdk-pixbuf before installing it.
* gdk-pixbuf.h: include gdk-pixbuf-loader.h
* gdk-pixbuf-loader.h, gdk-pixbuf-loader.c: Move back over here
from gtk, and add error to close(), because stop_load may do
parsing of the image.
* pixops/have_mmx.S (_pixops_have_mmx): add newline at end of file
* io-*.c: make individual operations static, and add fill_vtable
functions which are exported. Fix the collection of type warnings
that surfaced, including a number of functions that didn't
properly take a GError and some that weren't
const-correct. Involved adding error handling for a few loaders.
* gdk-pixbuf-io.h: Add error reporting to stop_load function
* gdk-pixbuf-io.c (gdk_pixbuf_load_module): change to just look up
a function that fills in the GdkPixbufModule vtable, instead of
looking up all the image functions individually; this means we
can get type safety within modules for the loader functions.
Also it means you don't have to keep the statically compiled and
GModule versions in sync.
* test-gdk-pixbuf.c (main): remove gdk_pixbuf_init()
* make-inline-pixbuf.c (main): remove call to gdk_pixbuf_init()
* gdk-pixbuf.h: nuke gdk_pixbuf_init()
* gdk-pixbuf-animation.c (gdk_pixbuf_frame_get_type): g_type_init
() here
* gdk-pixbuf.c (gdk_pixbuf_get_type): g_type_init () here
* gdk-pixbuf-animation.c (gdk_pixbuf_animation_get_type):
g_type_init() here
2001-01-22 Havoc Pennington <hp@redhat.com>
* demos/testanimation.c: fix to reflect gdk-pixbuf changes
* demos/testpixbuf.c: fix to reflect gdk-pixbuf changes
* gtk/gdk-pixbuf-loader.c, gtk/gdk-pixbuf-loader.h:
Remove, move back to gdk-pixbuf
* gtk/gtktextiter.c, gtk/gtktextiter.h: add sentence equivalents
to all the word functions
* gtk/gtktextview.c (gtk_text_view_start_cursor_blink): return
before doing anything on NULL layout or if we don't have the focus
* gtk/testtext.c (fill_example_buffer): "justification"
* gtk/gtktexttag.h, gtk/gtktexttag.c: change the tag attribute
to be called "justification" not "justify"
* demos/gtk-demo/textview.c (create_tags): "justification"
* gtk/gtktextlayout.c (set_para_values): Handle char-wise wrapping
800 lines
20 KiB
C
800 lines
20 KiB
C
/* GdkPixbuf library - Windows Bitmap image loader
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*
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* Copyright (C) 1999 The Free Software Foundation
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*
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* Authors: Arjan van de Ven <arjan@fenrus.demon.nl>
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* Federico Mena-Quintero <federico@gimp.org>
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*
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* Based on io-ras.c
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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/*
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Known bugs:
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* 4bpp compressed files don't work
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* bi-tonal files aren't tested with palettes
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*/
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#include <config.h>
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#include <stdio.h>
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#include <string.h>
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#include "gdk-pixbuf-private.h"
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#include "gdk-pixbuf-io.h"
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/*
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These structures are actually dummies. These are according to
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the "Windows API reference guide volume II" as written by
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Borland International, but GCC fiddles with the alignment of
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the internal members, so these aren't actually usable.
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*/
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struct BitmapFileHeader {
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gushort bfType;
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guint bfSize;
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guint reserverd;
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guint bfOffbits;
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};
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struct BitmapInfoHeader {
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guint biSize;
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guint biWidth;
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guint biHeight;
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gushort biPlanes;
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gushort biBitCount;
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guint biCompression;
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guint biSizeImage;
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guint biXPelsPerMeter;
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guint biYPelsPerMeter;
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guint biClrUsed;
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guint biClrImportant;
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};
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/*
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DumpBIH printf's the values in a BitmapInfoHeader to the screen, for
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debugging purposes.
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*/
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#if DUMPBIH
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static void DumpBIH(unsigned char *BIH)
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{
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printf("biSize = %i \n",
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(int) (BIH[3] << 24) + (BIH[2] << 16) + (BIH[1] << 8) +
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(BIH[0]));
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printf("biWidth = %i \n",
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(int) (BIH[7] << 24) + (BIH[6] << 16) + (BIH[5] << 8) +
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(BIH[4]));
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printf("biHeight = %i \n",
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(int) (BIH[11] << 24) + (BIH[10] << 16) + (BIH[9] << 8) +
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(BIH[8]));
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printf("biPlanes = %i \n", (int) (BIH[13] << 8) + (BIH[12]));
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printf("biBitCount = %i \n", (int) (BIH[15] << 8) + (BIH[14]));
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printf("biCompress = %i \n",
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(int) (BIH[19] << 24) + (BIH[18] << 16) + (BIH[17] << 8) +
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(BIH[16]));
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printf("biSizeImage = %i \n",
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(int) (BIH[23] << 24) + (BIH[22] << 16) + (BIH[21] << 8) +
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(BIH[20]));
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printf("biXPels = %i \n",
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(int) (BIH[27] << 24) + (BIH[26] << 16) + (BIH[25] << 8) +
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(BIH[24]));
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printf("biYPels = %i \n",
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(int) (BIH[31] << 24) + (BIH[30] << 16) + (BIH[29] << 8) +
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(BIH[28]));
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printf("biClrUsed = %i \n",
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(int) (BIH[35] << 24) + (BIH[34] << 16) + (BIH[33] << 8) +
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(BIH[32]));
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printf("biClrImprtnt= %i \n",
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(int) (BIH[39] << 24) + (BIH[38] << 16) + (BIH[37] << 8) +
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(BIH[36]));
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}
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#endif
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/* struct headerpair contains the decoded width/height/depth info for
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the current bitmap */
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struct headerpair {
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guint width;
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guint height;
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guint depth;
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guint Negative; /* Negative = 1 -> top down BMP,
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Negative = 0 -> bottom up BMP */
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};
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/* Data needed for the "state" during decompression */
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struct bmp_compression_state {
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gint phase; /* 0 = clean,
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1 = count received
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2 = escape received
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3 = in "raw" run
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4 = Relative part 1 is next
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5 = Relative part 2 is next
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6 = end of image -> No more input allowed
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*/
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gint RunCount;
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gint XDelta;
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gint YDelta;
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};
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/* Progressive loading */
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struct bmp_progressive_state {
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ModulePreparedNotifyFunc prepared_func;
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ModuleUpdatedNotifyFunc updated_func;
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gpointer user_data;
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gint HeaderSize; /* The size of the header-part (incl colormap) */
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guchar *HeaderBuf; /* The buffer for the header (incl colormap) */
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gint HeaderDone; /* The nr of bytes actually in HeaderBuf */
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gint LineWidth; /* The width of a line in bytes */
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guchar *LineBuf; /* Buffer for 1 line */
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gint LineDone; /* # of bytes in LineBuf */
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gint Lines; /* # of finished lines */
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gint Type; /*
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32 = RGB + alpha
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24 = RGB
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4 = 4 bpp colormapped
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8 = 8 bpp colormapped
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1 = 1 bit bitonal
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*/
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gint Compressed;
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struct bmp_compression_state compr;
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struct headerpair Header; /* Decoded (BE->CPU) header */
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GdkPixbuf *pixbuf; /* Our "target" */
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};
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static gpointer
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gdk_pixbuf__bmp_image_begin_load(ModulePreparedNotifyFunc prepared_func,
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ModuleUpdatedNotifyFunc updated_func,
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ModuleFrameDoneNotifyFunc frame_done_func,
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ModuleAnimationDoneNotifyFunc
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anim_done_func, gpointer user_data,
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GError **error);
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static gboolean gdk_pixbuf__bmp_image_stop_load(gpointer data, GError **error);
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static gboolean gdk_pixbuf__bmp_image_load_increment(gpointer data,
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const guchar * buf,
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guint size,
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GError **error);
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/* Shared library entry point --> This should be removed when
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generic_image_load enters gdk-pixbuf-io. */
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static GdkPixbuf *gdk_pixbuf__bmp_image_load(FILE * f, GError **error)
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{
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guchar membuf[4096];
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size_t length;
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struct bmp_progressive_state *State;
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GdkPixbuf *pb;
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State =
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gdk_pixbuf__bmp_image_begin_load(NULL, NULL, NULL, NULL, NULL,
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error);
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if (State == NULL)
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return NULL;
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while (feof(f) == 0) {
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length = fread(membuf, 1, 4096, f);
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if (length > 0)
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if (!gdk_pixbuf__bmp_image_load_increment(State,
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membuf,
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length,
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error)) {
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gdk_pixbuf__bmp_image_stop_load (State, NULL);
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return NULL;
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}
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}
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if (State->pixbuf != NULL)
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gdk_pixbuf_ref(State->pixbuf);
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pb = State->pixbuf;
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gdk_pixbuf__bmp_image_stop_load(State, NULL);
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return pb;
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}
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static gboolean DecodeHeader(unsigned char *BFH, unsigned char *BIH,
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struct bmp_progressive_state *State,
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GError **error)
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{
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gboolean retval = TRUE;
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/* FIXME this is totally unrobust against bogus image data. */
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#if DUMPBIH
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DumpBIH(BIH);
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#endif
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State->Header.width =
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(int) (BIH[7] << 24) + (BIH[6] << 16) + (BIH[5] << 8) +
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(BIH[4]);
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State->Header.height =
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(int) (BIH[11] << 24) + (BIH[10] << 16) + (BIH[9] << 8) +
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(BIH[8]);
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State->Header.depth = (int) (BIH[15] << 8) + (BIH[14]);;
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State->Type = State->Header.depth; /* This may be less trivial someday */
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State->HeaderSize =
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(int) ((BFH[13] << 24) + (BFH[12] << 16) + (BFH[11] << 8) +
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(BFH[10]));
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if (State->HeaderSize >= 14 + 40 + 1024)
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State->HeaderBuf =
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g_realloc(State->HeaderBuf, State->HeaderSize);
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if ((BIH[16] != 0) || (BIH[17] != 0) || (BIH[18] != 0)
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|| (BIH[19] != 0)) {
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State->Compressed = 1;
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}
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/* Negative heights indicates bottom-down pixelorder */
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if (State->Header.height < 0) {
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State->Header.height = -State->Header.height;
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State->Header.Negative = 1;
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}
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if (State->Header.width < 0) {
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State->Header.width = -State->Header.width;
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State->Header.Negative = 0;
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}
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if (State->Type == 32)
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State->LineWidth = State->Header.width * 4;
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if (State->Type == 24)
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State->LineWidth = State->Header.width * 3;
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if (State->Type == 8)
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State->LineWidth = State->Header.width * 1;
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if (State->Type == 4)
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State->LineWidth = (State->Header.width + 1) / 2;
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if (State->Type == 1) {
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State->LineWidth = State->Header.width / 8;
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if ((State->Header.width & 7) != 0)
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State->LineWidth++;
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}
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/* Pad to a 32 bit boundary */
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if (((State->LineWidth % 4) > 0) && (State->Compressed == 0))
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State->LineWidth = (State->LineWidth / 4) * 4 + 4;
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if (State->LineBuf == NULL)
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State->LineBuf = g_malloc(State->LineWidth);
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if (State->pixbuf == NULL) {
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if (State->Type == 32)
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State->pixbuf =
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gdk_pixbuf_new(GDK_COLORSPACE_RGB, TRUE, 8,
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(gint) State->Header.width,
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(gint) State->Header.height);
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else
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State->pixbuf =
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gdk_pixbuf_new(GDK_COLORSPACE_RGB, FALSE, 8,
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(gint) State->Header.width,
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(gint) State->Header.height);
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if (State->pixbuf == NULL) {
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g_set_error (error,
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GDK_PIXBUF_ERROR,
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GDK_PIXBUF_ERROR_INSUFFICIENT_MEMORY,
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_("Not enough memory to load bitmap image"));
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retval = FALSE;
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}
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if (State->prepared_func != NULL)
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/* Notify the client that we are ready to go */
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(*State->prepared_func) (State->pixbuf, State->user_data);
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}
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return retval;
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}
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/*
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* func - called when we have pixmap created (but no image data)
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* user_data - passed as arg 1 to func
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* return context (opaque to user)
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*/
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static gpointer
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gdk_pixbuf__bmp_image_begin_load(ModulePreparedNotifyFunc prepared_func,
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ModuleUpdatedNotifyFunc updated_func,
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ModuleFrameDoneNotifyFunc frame_done_func,
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ModuleAnimationDoneNotifyFunc
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anim_done_func, gpointer user_data,
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GError **error)
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{
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struct bmp_progressive_state *context;
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context = g_new0(struct bmp_progressive_state, 1);
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context->prepared_func = prepared_func;
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context->updated_func = updated_func;
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context->user_data = user_data;
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context->HeaderSize = 54;
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context->HeaderBuf = g_malloc(14 + 40 + 1024);
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/* 14 for the BitmapFileHeader, 40 for the BitmapImageHeader and
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1024 for the colormap */
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context->HeaderDone = 0;
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context->LineWidth = 0;
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context->LineBuf = NULL;
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context->LineDone = 0;
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context->Lines = 0;
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context->Type = 0;
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memset(&context->Header, 0, sizeof(struct headerpair));
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memset(&context->compr, 0, sizeof(struct bmp_compression_state));
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context->pixbuf = NULL;
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return (gpointer) context;
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}
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/*
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* context - returned from image_begin_load
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*
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* free context, unref gdk_pixbuf
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*/
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static gboolean gdk_pixbuf__bmp_image_stop_load(gpointer data, GError **error)
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{
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struct bmp_progressive_state *context =
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(struct bmp_progressive_state *) data;
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/* FIXME this thing needs to report errors if
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* we have unused image data
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*/
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g_return_val_if_fail(context != NULL, TRUE);
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if (context->LineBuf != NULL)
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g_free(context->LineBuf);
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context->LineBuf = NULL;
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if (context->HeaderBuf != NULL)
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g_free(context->HeaderBuf);
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context->LineBuf = NULL;
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if (context->pixbuf)
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gdk_pixbuf_unref(context->pixbuf);
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g_free(context);
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return TRUE;
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}
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/*
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The OneLineXX functions are called when 1 line worth of data is present.
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OneLine24 is the 24 bpp-version.
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*/
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static void OneLine32(struct bmp_progressive_state *context)
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{
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gint X;
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guchar *Pixels;
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X = 0;
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if (context->Header.Negative == 0)
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Pixels = (context->pixbuf->pixels +
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context->pixbuf->rowstride *
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(context->Header.height - context->Lines - 1));
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else
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Pixels = (context->pixbuf->pixels +
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context->pixbuf->rowstride *
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context->Lines);
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while (X < context->Header.width) {
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Pixels[X * 4 + 0] = context->LineBuf[X * 4 + 2];
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Pixels[X * 4 + 1] = context->LineBuf[X * 4 + 1];
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Pixels[X * 4 + 2] = context->LineBuf[X * 4 + 0];
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Pixels[X * 4 + 3] = context->LineBuf[X * 4 + 3];
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X++;
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}
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}
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static void OneLine24(struct bmp_progressive_state *context)
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{
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gint X;
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guchar *Pixels;
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X = 0;
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if (context->Header.Negative == 0)
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Pixels = (context->pixbuf->pixels +
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context->pixbuf->rowstride *
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(context->Header.height - context->Lines - 1));
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else
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Pixels = (context->pixbuf->pixels +
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context->pixbuf->rowstride *
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context->Lines);
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while (X < context->Header.width) {
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Pixels[X * 3 + 0] = context->LineBuf[X * 3 + 2];
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Pixels[X * 3 + 1] = context->LineBuf[X * 3 + 1];
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Pixels[X * 3 + 2] = context->LineBuf[X * 3 + 0];
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X++;
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}
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}
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static void OneLine8(struct bmp_progressive_state *context)
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{
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gint X;
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guchar *Pixels;
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X = 0;
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if (context->Header.Negative == 0)
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Pixels = (context->pixbuf->pixels +
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context->pixbuf->rowstride *
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(context->Header.height - context->Lines - 1));
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else
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Pixels = (context->pixbuf->pixels +
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context->pixbuf->rowstride *
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context->Lines);
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while (X < context->Header.width) {
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Pixels[X * 3 + 0] =
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context->HeaderBuf[4 * context->LineBuf[X] + 56];
|
||
Pixels[X * 3 + 1] =
|
||
context->HeaderBuf[4 * context->LineBuf[X] + 55];
|
||
Pixels[X * 3 + 2] =
|
||
context->HeaderBuf[4 * context->LineBuf[X] + 54];
|
||
X++;
|
||
}
|
||
}
|
||
|
||
static void OneLine4(struct bmp_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 * 3 + 0] =
|
||
context->HeaderBuf[4 * (Pix >> 4) + 56];
|
||
Pixels[X * 3 + 1] =
|
||
context->HeaderBuf[4 * (Pix >> 4) + 55];
|
||
Pixels[X * 3 + 2] =
|
||
context->HeaderBuf[4 * (Pix >> 4) + 54];
|
||
X++;
|
||
if (X < context->Header.width) {
|
||
/* Handle the other 4 bit pixel only when there is one */
|
||
Pixels[X * 3 + 0] =
|
||
context->HeaderBuf[4 * (Pix & 15) + 56];
|
||
Pixels[X * 3 + 1] =
|
||
context->HeaderBuf[4 * (Pix & 15) + 55];
|
||
Pixels[X * 3 + 2] =
|
||
context->HeaderBuf[4 * (Pix & 15) + 54];
|
||
X++;
|
||
}
|
||
}
|
||
|
||
}
|
||
|
||
static void OneLine1(struct bmp_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) {
|
||
gint Bit;
|
||
|
||
Bit = (context->LineBuf[X / 8]) >> (7 - (X & 7));
|
||
Bit = Bit & 1;
|
||
Pixels[X * 3 + 0] = Bit * 255;
|
||
Pixels[X * 3 + 1] = Bit * 255;
|
||
Pixels[X * 3 + 2] = Bit * 255;
|
||
X++;
|
||
}
|
||
}
|
||
|
||
|
||
static void OneLine(struct bmp_progressive_state *context)
|
||
{
|
||
context->LineDone = 0;
|
||
if (context->Lines >= context->Header.height)
|
||
return;
|
||
|
||
if (context->Type == 32)
|
||
OneLine32(context);
|
||
if (context->Type == 24)
|
||
OneLine24(context);
|
||
if (context->Type == 8)
|
||
OneLine8(context);
|
||
if (context->Type == 4)
|
||
OneLine4(context);
|
||
if (context->Type == 1)
|
||
OneLine1(context);
|
||
|
||
context->Lines++;
|
||
|
||
if (context->updated_func != NULL) {
|
||
(*context->updated_func) (context->pixbuf,
|
||
0,
|
||
context->Lines,
|
||
context->Header.width,
|
||
context->Header.height,
|
||
context->user_data);
|
||
|
||
}
|
||
}
|
||
|
||
/* DoCompressedByte handles 1 byte of incomming compressed data */
|
||
static void
|
||
DoCompressedByte(struct bmp_progressive_state *context, guchar ** buf,
|
||
gint * size)
|
||
{
|
||
gint BytesToCopy;
|
||
switch (context->compr.phase) {
|
||
case 0: /* Neutral state */
|
||
if ((*buf)[0] != 0) { /* run count */
|
||
context->compr.phase = 1;
|
||
context->compr.RunCount = (*buf)[0];
|
||
|
||
} else { /* Escape */
|
||
context->compr.phase = 2;
|
||
}
|
||
(*buf)++;
|
||
(*size)--;
|
||
break;
|
||
case 1: /* Run count received.... */
|
||
while (context->compr.RunCount > 0) {
|
||
BytesToCopy =
|
||
context->LineWidth - context->LineDone;
|
||
if (BytesToCopy > context->compr.RunCount)
|
||
BytesToCopy = context->compr.RunCount;
|
||
if (BytesToCopy > 0) {
|
||
memset(context->LineBuf +
|
||
context->LineDone, (*buf)[0],
|
||
BytesToCopy);
|
||
|
||
context->compr.RunCount -= BytesToCopy;
|
||
context->LineDone += BytesToCopy;
|
||
}
|
||
if ((context->LineDone >= context->LineWidth)
|
||
&& (context->LineWidth > 0)) {
|
||
OneLine(context);
|
||
}
|
||
}
|
||
context->compr.phase = 0;
|
||
(*buf)++;
|
||
(*size)--;
|
||
break;
|
||
case 2: /* Escape received */
|
||
if ((*buf)[0] == 0) { /* End of line */
|
||
context->compr.phase = 0;
|
||
if (context->LineDone > 0)
|
||
OneLine(context);
|
||
} else if ((*buf)[0] == 1) { /* End of image */
|
||
OneLine(context);
|
||
context->compr.phase = 6;
|
||
(*size) = 0;
|
||
break;
|
||
} else if ((*buf)[0] == 2) { /* Cursor displacement */
|
||
context->compr.phase = 4;
|
||
} else {
|
||
context->compr.phase = 3;
|
||
context->compr.RunCount = (*buf)[0];
|
||
if (context->compr.RunCount & 1)
|
||
context->compr.phase = 7;
|
||
|
||
}
|
||
(*buf)++;
|
||
(*size)--;
|
||
|
||
break;
|
||
case 3:
|
||
while ((context->compr.RunCount > 0)
|
||
&& (*size > 0)) {
|
||
BytesToCopy =
|
||
context->LineWidth - context->LineDone;
|
||
if (BytesToCopy > context->compr.RunCount)
|
||
BytesToCopy = context->compr.RunCount;
|
||
if (BytesToCopy > *size)
|
||
BytesToCopy = *size;
|
||
|
||
if (BytesToCopy > 0) {
|
||
memcpy(context->LineBuf +
|
||
context->LineDone, *buf,
|
||
BytesToCopy);
|
||
|
||
context->compr.RunCount -= BytesToCopy;
|
||
(*buf) += BytesToCopy;
|
||
(*size) -= BytesToCopy;
|
||
context->LineDone += BytesToCopy;
|
||
}
|
||
if ((context->LineDone >= context->LineWidth)
|
||
&& (context->LineWidth > 0))
|
||
OneLine(context);
|
||
}
|
||
if (context->compr.RunCount <= 0)
|
||
context->compr.phase = 0;
|
||
|
||
break;
|
||
case 4:
|
||
context->compr.phase = 5;
|
||
context->compr.XDelta = (*buf)[0];
|
||
(*buf)++;
|
||
(*size)--;
|
||
break;
|
||
case 5:
|
||
context->compr.phase = 0;
|
||
context->compr.YDelta = (*buf)[0];
|
||
g_assert(0); /* No implementatio of this yet */
|
||
/* If this happens, please email me (arjan@fenrus.demon.nl)
|
||
the image concerned. */
|
||
(*buf)++;
|
||
(*size)--;
|
||
break;
|
||
case 6:
|
||
(*size) = 0;
|
||
break;
|
||
case 7: /* Odd raw run */
|
||
while ((context->compr.RunCount > 0) && (*size > 0)) {
|
||
BytesToCopy =
|
||
context->LineWidth - context->LineDone;
|
||
if (BytesToCopy > context->compr.RunCount)
|
||
BytesToCopy = context->compr.RunCount;
|
||
if (BytesToCopy > *size)
|
||
BytesToCopy = *size;
|
||
|
||
if (BytesToCopy > 0) {
|
||
memcpy(context->LineBuf +
|
||
context->LineDone, *buf,
|
||
BytesToCopy);
|
||
|
||
context->compr.RunCount -= BytesToCopy;
|
||
(*buf) += BytesToCopy;
|
||
(*size) -= BytesToCopy;
|
||
context->LineDone += BytesToCopy;
|
||
}
|
||
if ((context->LineDone >= context->LineWidth)
|
||
&& (context->LineWidth > 0))
|
||
OneLine(context);
|
||
}
|
||
if (context->compr.RunCount <= 0)
|
||
context->compr.phase = 8;
|
||
|
||
break;
|
||
case 8: /* Eat dummy byte; */
|
||
(*buf)++;
|
||
(*size)--;
|
||
context->compr.phase = 0;
|
||
break;
|
||
}
|
||
}
|
||
|
||
/*
|
||
* context - from image_begin_load
|
||
* buf - new image data
|
||
* size - length of new image data
|
||
*
|
||
* append image data onto inrecrementally built output image
|
||
*/
|
||
static gboolean
|
||
gdk_pixbuf__bmp_image_load_increment(gpointer data,
|
||
const guchar * buf,
|
||
guint size,
|
||
GError **error)
|
||
{
|
||
struct bmp_progressive_state *context =
|
||
(struct bmp_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 if (context->Compressed) {
|
||
/* Compression is done 1 byte at a time for now */
|
||
DoCompressedByte(context, &buf, &size);
|
||
|
||
} else {
|
||
/* Uncompressed pixeldata */
|
||
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 >= 14 + 40)
|
||
if (!DecodeHeader(context->HeaderBuf,
|
||
context->HeaderBuf + 14, context,
|
||
error))
|
||
return FALSE;
|
||
|
||
|
||
}
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
void
|
||
gdk_pixbuf__bmp_fill_vtable (GdkPixbufModule *module)
|
||
{
|
||
module->load = gdk_pixbuf__bmp_image_load;
|
||
module->begin_load = gdk_pixbuf__bmp_image_begin_load;
|
||
module->stop_load = gdk_pixbuf__bmp_image_stop_load;
|
||
module->load_increment = gdk_pixbuf__bmp_image_load_increment;
|
||
}
|