/* -*- mode: C; c-file-style: "linux" -*- */ /* GdkPixbuf library - Windows Icon/Cursor image loader * * Copyright (C) 1999 The Free Software Foundation * * Authors: Arjan van de Ven * Federico Mena-Quintero * * 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 #include #include #ifdef HAVE_UNISTD_H #include #endif #include #include "gdk-pixbuf-private.h" #include "gdk-pixbuf-io.h" #include /* 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 { gint width; gint height; guint depth; guint Negative; /* Negative = 1 -> top down BMP, Negative = 0 -> bottom up BMP */ }; struct ico_progressive_state { GdkPixbufModuleSizeFunc size_func; GdkPixbufModulePreparedFunc prepared_func; GdkPixbufModuleUpdatedFunc 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; /* 32 = RGBA 24 = RGB 16 = 555 RGB 8 = 8 bit colormapped 4 = 4 bpp colormapped 1 = 1 bit bitonal */ gboolean cursor; gint x_hot; gint y_hot; struct headerpair Header; /* Decoded (BE->CPU) header */ gint DIBoffset; gint ImageScore; GdkPixbuf *pixbuf; /* Our "target" */ }; static gpointer gdk_pixbuf__ico_image_begin_load(GdkPixbufModuleSizeFunc size_func, GdkPixbufModulePreparedFunc prepared_func, GdkPixbufModuleUpdatedFunc updated_func, gpointer user_data, GError **error); static gboolean gdk_pixbuf__ico_image_stop_load(gpointer data, GError **error); static gboolean gdk_pixbuf__ico_image_load_increment(gpointer data, const guchar * buf, guint size, GError **error); static void context_free (struct ico_progressive_state *context) { if (context->LineBuf != NULL) g_free (context->LineBuf); context->LineBuf = NULL; if (context->HeaderBuf != NULL) g_free (context->HeaderBuf); if (context->pixbuf) g_object_unref (context->pixbuf); g_free (context); } static void DecodeHeader(guchar *Data, gint Bytes, struct ico_progressive_state *State, GError **error) { /* For ICO's we have to be very clever. There are multiple images possible in an .ICO. As a simple heuristic, we select the image which occupies the largest number of bytes. */ 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 */ State->cursor = ((Data[3] << 8) + Data[2] == 2) ? TRUE : FALSE; IconCount = (Data[5] << 8) + (Data[4]); State->HeaderSize = 6 + IconCount*16; if (State->HeaderSize>State->BytesInHeaderBuf) { guchar *tmp=g_try_realloc(State->HeaderBuf,State->HeaderSize); if (!tmp) { g_set_error (error, GDK_PIXBUF_ERROR, GDK_PIXBUF_ERROR_INSUFFICIENT_MEMORY, _("Not enough memory to load icon")); return; } State->HeaderBuf = tmp; 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=State->ImageScore) { State->ImageScore = ThisScore; State->x_hot = (Ptr[5] << 8) + Ptr[4]; State->y_hot = (Ptr[7] << 8) + Ptr[6]; State->DIBoffset = (Ptr[15]<<24)+(Ptr[14]<<16)+ (Ptr[13]<<8) + (Ptr[12]); } Ptr += 16; } if (State->DIBoffset < 0) { g_set_error (error, GDK_PIXBUF_ERROR, GDK_PIXBUF_ERROR_CORRUPT_IMAGE, _("Invalid header in icon")); return; } /* 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) { guchar *tmp=g_try_realloc(State->HeaderBuf,State->HeaderSize); if (!tmp) { g_set_error (error, GDK_PIXBUF_ERROR, GDK_PIXBUF_ERROR_INSUFFICIENT_MEMORY, _("Not enough memory to load icon")); return; } State->HeaderBuf = tmp; State->BytesInHeaderBuf = State->HeaderSize; } if (BytesHeaderSize) 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]); if (State->Header.width == 0) { g_set_error (error, GDK_PIXBUF_ERROR, GDK_PIXBUF_ERROR_CORRUPT_IMAGE, _("Icon has zero width")); return; } 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 */ if (State->Header.height == 0) { g_set_error (error, GDK_PIXBUF_ERROR, GDK_PIXBUF_ERROR_CORRUPT_IMAGE, _("Icon has zero height")); return; } 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 < 0) { g_set_error (error, GDK_PIXBUF_ERROR, GDK_PIXBUF_ERROR_CORRUPT_IMAGE, _("Invalid header in icon")); return; } if (State->HeaderSize>State->BytesInHeaderBuf) { guchar *tmp=g_try_realloc(State->HeaderBuf,State->HeaderSize); if (!tmp) { g_set_error (error, GDK_PIXBUF_ERROR, GDK_PIXBUF_ERROR_INSUFFICIENT_MEMORY, _("Not enough memory to load icon")); return; } State->HeaderBuf = tmp; State->BytesInHeaderBuf = State->HeaderSize; } if (Bytes < State->HeaderSize) return; if ((BIH[16] != 0) || (BIH[17] != 0) || (BIH[18] != 0) || (BIH[19] != 0)) { /* FIXME: is this the correct message? */ g_set_error (error, GDK_PIXBUF_ERROR, GDK_PIXBUF_ERROR_CORRUPT_IMAGE, _("Compressed icons are not supported")); return; } /* 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; } g_assert (State->Header.width > 0); g_assert (State->Header.height > 0); if (State->Type == 32) State->LineWidth = State->Header.width * 4; else if (State->Type == 24) State->LineWidth = State->Header.width * 3; else if (State->Type == 16) State->LineWidth = State->Header.width * 2; else if (State->Type == 8) State->LineWidth = State->Header.width * 1; else if (State->Type == 4) State->LineWidth = (State->Header.width+1)/2; else if (State->Type == 1) { State->LineWidth = State->Header.width / 8; if ((State->Header.width & 7) != 0) State->LineWidth++; } else { g_set_error (error, GDK_PIXBUF_ERROR, GDK_PIXBUF_ERROR_CORRUPT_IMAGE, _("Unsupported icon type")); return; } /* 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_try_malloc(State->LineWidth); if (!State->LineBuf) { g_set_error (error, GDK_PIXBUF_ERROR, GDK_PIXBUF_ERROR_INSUFFICIENT_MEMORY, _("Not enough memory to load icon")); return; } } g_assert(State->LineBuf != NULL); if (State->pixbuf == NULL) { #if 1 if (State->size_func) { gint width = State->Header.width; gint height = State->Header.height; (*State->size_func) (&width, &height, State->user_data); if (width == 0 || height == 0) { State->LineWidth = 0; return; } } #endif State->pixbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB, TRUE, 8, State->Header.width, State->Header.height); if (!State->pixbuf) { g_set_error (error, GDK_PIXBUF_ERROR, GDK_PIXBUF_ERROR_INSUFFICIENT_MEMORY, _("Not enough memory to load icon")); return; } if (State->cursor) { gchar hot[10]; g_snprintf (hot, 10, "%d", State->x_hot); gdk_pixbuf_set_option (State->pixbuf, "x_hot", hot); g_snprintf (hot, 10, "%d", State->y_hot); gdk_pixbuf_set_option (State->pixbuf, "y_hot", hot); } if (State->prepared_func != NULL) /* Notify the client that we are ready to go */ (*State->prepared_func) (State->pixbuf, NULL, 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) */ static gpointer gdk_pixbuf__ico_image_begin_load(GdkPixbufModuleSizeFunc size_func, GdkPixbufModulePreparedFunc prepared_func, GdkPixbufModuleUpdatedFunc updated_func, gpointer user_data, GError **error) { struct ico_progressive_state *context; context = g_new0(struct ico_progressive_state, 1); context->size_func = size_func; context->prepared_func = prepared_func; context->updated_func = updated_func; context->user_data = user_data; context->HeaderSize = 54; context->HeaderBuf = g_try_malloc(14 + 40 + 4*256 + 512); if (!context->HeaderBuf) { g_free (context); g_set_error (error, GDK_PIXBUF_ERROR, GDK_PIXBUF_ERROR_INSUFFICIENT_MEMORY, _("Not enough memory to load ICO file")); return NULL; } /* 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 */ static gboolean gdk_pixbuf__ico_image_stop_load(gpointer data, GError **error) { struct ico_progressive_state *context = (struct ico_progressive_state *) data; /* FIXME this thing needs to report errors if * we have unused image data */ g_return_val_if_fail(context != NULL, TRUE); context_free (context); return TRUE; } static void OneLine32 (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 * 4 + 2]; Pixels[X * 4 + 1] = context->LineBuf[X * 4 + 1]; Pixels[X * 4 + 2] = context->LineBuf[X * 4 + 0]; Pixels[X * 4 + 3] = context->LineBuf[X * 4 + 3]; X++; } } 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 OneLine16 (struct ico_progressive_state *context) { int i; guchar *pixels; guchar *src; 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); src = context->LineBuf; for (i = 0; i < context->Header.width; i++) { int v, r, g, b; v = (int) src[0] | ((int) src[1] << 8); src += 2; /* Extract 5-bit RGB values */ r = (v >> 10) & 0x1f; g = (v >> 5) & 0x1f; b = v & 0x1f; /* Fill the rightmost bits to form 8-bit values */ *pixels++ = (r << 3) | (r >> 2); *pixels++ = (g << 3) | (g >> 2); *pixels++ = (b << 3) | (b >> 2); pixels++; /* skip alpha channel */ } } 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 (XHeader.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; /* Ignore the XOR mask for XP style 32-bpp icons with alpha */ if (context->Header.depth == 32) return; 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 Header.height) { if (context->Type == 32) OneLine32 (context); else if (context->Type == 24) OneLine24(context); else if (context->Type == 16) OneLine16 (context); else if (context->Type == 8) OneLine8(context); else if (context->Type == 4) OneLine4(context); else if (context->Type == 1) OneLine1(context); else g_assert_not_reached (); } 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.height, context->Header.width, 1, 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 */ static gboolean gdk_pixbuf__ico_image_load_increment(gpointer data, const 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 && context->pixbuf == NULL) { GError *decode_err = NULL; DecodeHeader(context->HeaderBuf, context->HeaderDone, context, &decode_err); if (context->LineBuf != NULL && context->LineWidth == 0) return TRUE; if (decode_err) { g_propagate_error (error, decode_err); return FALSE; } } } return TRUE; } /* saving ICOs */ static gint write8 (FILE *f, guint8 *data, gint count) { gint bytes; gint written; written = 0; while (count > 0) { bytes = fwrite ((char*) data, sizeof (char), count, f); if (bytes <= 0) break; count -= bytes; data += bytes; written += bytes; } return written; } static gint write16 (FILE *f, guint16 *data, gint count) { gint i; for (i = 0; i < count; i++) data[i] = GUINT16_TO_LE (data[i]); return write8 (f, (guint8*) data, count * 2); } static gint write32 (FILE *f, guint32 *data, gint count) { gint i; for (i = 0; i < count; i++) data[i] = GUINT32_TO_LE (data[i]); return write8 (f, (guint8*) data, count * 4); } typedef struct _IconEntry IconEntry; struct _IconEntry { gint width; gint height; gint depth; gint hot_x; gint hot_y; guint8 n_colors; guint32 *colors; guint xor_rowstride; guint8 *xor; guint and_rowstride; guint8 *and; }; static gboolean fill_entry (IconEntry *icon, GdkPixbuf *pixbuf, gint hot_x, gint hot_y, GError **error) { guchar *p, *pixels, *and, *xor; gint n_channels, v, x, y; if (icon->width > 255 || icon->height > 255) { g_set_error (error, GDK_PIXBUF_ERROR, GDK_PIXBUF_ERROR_BAD_OPTION, _("Image too large to be saved as ICO")); return FALSE; } if (hot_x > -1 && hot_y > -1) { icon->hot_x = hot_x; icon->hot_x = hot_y; if (icon->hot_x >= icon->width || icon->hot_y >= icon->height) { g_set_error (error, GDK_PIXBUF_ERROR, GDK_PIXBUF_ERROR_BAD_OPTION, _("Cursor hotspot outside image")); return FALSE; } } else { icon->hot_x = -1; icon->hot_y = -1; } switch (icon->depth) { case 32: icon->xor_rowstride = icon->width * 4; break; case 24: icon->xor_rowstride = icon->width * 3; break; case 16: icon->xor_rowstride = icon->width * 2; break; default: g_set_error (error, GDK_PIXBUF_ERROR, GDK_PIXBUF_ERROR_BAD_OPTION, _("Unsupported depth for ICO file: %d"), icon->depth); return FALSE; } if ((icon->xor_rowstride % 4) != 0) icon->xor_rowstride = 4 * ((icon->xor_rowstride / 4) + 1); icon->xor = g_new0 (guchar, icon->xor_rowstride * icon->height); icon->and_rowstride = icon->width / 8; if ((icon->and_rowstride % 4) != 0) icon->and_rowstride = 4 * ((icon->and_rowstride / 4) + 1); icon->and = g_new0 (guchar, icon->and_rowstride * icon->height); pixels = gdk_pixbuf_get_pixels (pixbuf); n_channels = gdk_pixbuf_get_n_channels (pixbuf); for (y = 0; y < icon->height; y++) { p = pixels + gdk_pixbuf_get_rowstride (pixbuf) * (icon->height - 1 - y); and = icon->and + icon->and_rowstride * y; xor = icon->xor + icon->xor_rowstride * y; for (x = 0; x < icon->width; x++) { switch (icon->depth) { case 32: xor[0] = p[2]; xor[1] = p[1]; xor[2] = p[0]; xor[3] = 0xff; if (n_channels == 4) { xor[3] = p[3]; if (p[3] < 0x80) *and |= 1 << (7 - x % 8); } xor += 4; break; case 24: xor[0] = p[2]; xor[1] = p[1]; xor[2] = p[0]; if (n_channels == 4 && p[3] < 0x80) *and |= 1 << (7 - x % 8); xor += 3; break; case 16: v = ((p[0] >> 3) << 10) | ((p[1] >> 3) << 5) | (p[2] >> 3); xor[0] = v & 0xff; xor[1] = v >> 8; if (n_channels == 4 && p[3] < 0x80) *and |= 1 << (7 - x % 8); xor += 2; break; } p += n_channels; if (x % 8 == 7) and++; } } return TRUE; } static void free_entry (IconEntry *icon) { g_free (icon->colors); g_free (icon->and); g_free (icon->xor); g_free (icon); } static void write_icon (FILE *f, GSList *entries) { IconEntry *icon; GSList *entry; guint8 bytes[4]; guint16 words[4]; guint32 dwords[6]; gint type; gint n_entries; gint offset; gint size; if (((IconEntry *)entries->data)->hot_x > -1) type = 2; else type = 1; n_entries = g_slist_length (entries); /* header */ words[0] = 0; words[1] = type; words[2] = n_entries; write16 (f, words, 3); offset = 6 + 16 * n_entries; for (entry = entries; entry; entry = entry->next) { icon = (IconEntry *)entry->data; size = 40 + icon->height * (icon->and_rowstride + icon->xor_rowstride); /* directory entry */ bytes[0] = icon->width; bytes[1] = icon->height; bytes[2] = icon->n_colors; bytes[3] = 0; write8 (f, bytes, 4); if (type == 1) { words[0] = 1; words[1] = icon->depth; } else { words[0] = icon->hot_x; words[1] = icon->hot_y; } write16 (f, words, 2); dwords[0] = size; dwords[1] = offset; write32 (f, dwords, 2); offset += size; } for (entry = entries; entry; entry = entry->next) { icon = (IconEntry *)entry->data; /* bitmap header */ dwords[0] = 40; dwords[1] = icon->width; dwords[2] = icon->height * 2; write32 (f, dwords, 3); words[0] = 1; words[1] = icon->depth; write16 (f, words, 2); dwords[0] = 0; dwords[1] = 0; dwords[2] = 0; dwords[3] = 0; dwords[4] = 0; dwords[5] = 0; write32 (f, dwords, 6); /* image data */ write8 (f, icon->xor, icon->xor_rowstride * icon->height); write8 (f, icon->and, icon->and_rowstride * icon->height); } } static gboolean gdk_pixbuf__ico_image_save (FILE *f, GdkPixbuf *pixbuf, gchar **keys, gchar **values, GError **error) { gint hot_x, hot_y; IconEntry *icon; GSList *entries = NULL; /* support only single-image ICOs for now */ icon = g_new0 (IconEntry, 1); icon->width = gdk_pixbuf_get_width (pixbuf); icon->height = gdk_pixbuf_get_height (pixbuf); icon->depth = gdk_pixbuf_get_has_alpha (pixbuf) ? 32 : 24; hot_x = -1; hot_y = -1; /* parse options */ if (keys && *keys) { gchar **kiter; gchar **viter; for (kiter = keys, viter = values; *kiter && *viter; kiter++, viter++) { char *endptr; if (strcmp (*kiter, "depth") == 0) { sscanf (*viter, "%d", &icon->depth); } else if (strcmp (*kiter, "x_hot") == 0) { hot_x = strtol (*viter, &endptr, 10); } else if (strcmp (*kiter, "y_hot") == 0) { hot_y = strtol (*viter, &endptr, 10); } } } if (!fill_entry (icon, pixbuf, hot_x, hot_y, error)) { free_entry (icon); return FALSE; } entries = g_slist_append (entries, icon); write_icon (f, entries); g_slist_foreach (entries, (GFunc)free_entry, NULL); g_slist_free (entries); return TRUE; } void MODULE_ENTRY (ico, fill_vtable) (GdkPixbufModule *module) { module->begin_load = gdk_pixbuf__ico_image_begin_load; module->stop_load = gdk_pixbuf__ico_image_stop_load; module->load_increment = gdk_pixbuf__ico_image_load_increment; module->save = gdk_pixbuf__ico_image_save; } void MODULE_ENTRY (ico, fill_info) (GdkPixbufFormat *info) { static GdkPixbufModulePattern signature[] = { { " \x1 ", "zz znz", 100 }, { " \x2 ", "zz znz", 100 }, { NULL, NULL, 0 } }; static gchar * mime_types[] = { "image/x-icon", NULL }; static gchar * extensions[] = { "ico", "cur", NULL }; info->name = "ico"; info->signature = signature; info->description = N_("The ICO image format"); info->mime_types = mime_types; info->extensions = extensions; info->flags = GDK_PIXBUF_FORMAT_WRITABLE; info->license = "LGPL"; }