ILAPI ILpal* ILAPIENTRY iCopyPal() { ILpal *Pal; if (iCurImage == NULL || iCurImage->Pal.Palette == NULL || iCurImage->Pal.PalSize == 0 || iCurImage->Pal.PalType == IL_PAL_NONE) { ilSetError(IL_ILLEGAL_OPERATION); return NULL; } Pal = (ILpal*)ialloc(sizeof(ILpal)); if (Pal == NULL) { return NULL; } if (!iCopyPalette(Pal, &iCurImage->Pal)) { ifree(Pal); return NULL; } return Pal; }
ILboolean GetImages(ILpal *GlobalPal, GIFHEAD *GifHead) { IMAGEDESC ImageDesc, OldImageDesc; GFXCONTROL Gfx; ILboolean BaseImage = IL_TRUE; ILimage *Image = iCurImage, *TempImage = NULL; ILuint NumImages = 0, i; ILint input; Gfx.Used = IL_TRUE; while (!ieof()) { ILubyte DisposalMethod = 1; i = itell(); if (!SkipExtensions(&Gfx)) goto error_clean; i = itell(); if (!Gfx.Used) DisposalMethod = (Gfx.Packed & 0x1C) >> 2; //read image descriptor ImageDesc.Separator = igetc(); if (ImageDesc.Separator != 0x2C) //end of image break; ImageDesc.OffX = GetLittleUShort(); ImageDesc.OffY = GetLittleUShort(); ImageDesc.Width = GetLittleUShort(); ImageDesc.Height = GetLittleUShort(); ImageDesc.ImageInfo = igetc(); if (ieof()) { ilGetError(); // Gets rid of the IL_FILE_READ_ERROR that inevitably results. break; } if (!BaseImage) { NumImages++; Image->Next = ilNewImage(iCurImage->Width, iCurImage->Height, 1, 1, 1); if (Image->Next == NULL) goto error_clean; //20040612: DisposalMethod controls how the new images data is to be combined //with the old image. 0 means that it doesn't matter how they are combined, //1 means keep the old image, 2 means set to background color, 3 is //load the image that was in place before the current (this is not implemented //here! (TODO?)) if (DisposalMethod == 2 || DisposalMethod == 3) //Note that this is actually wrong, too: If the image has a local //color table, we should really search for the best fit of the //background color table and use that index (?). Furthermore, //we should only memset the part of the image that is not read //later (if we are sure that no parts of the read image are transparent). if (!Gfx.Used && Gfx.Packed & 0x1) memset(Image->Next->Data, Gfx.Transparent, Image->SizeOfData); else memset(Image->Next->Data, GifHead->Background, Image->SizeOfData); else if (DisposalMethod == 1 || DisposalMethod == 0) memcpy(Image->Next->Data, Image->Data, Image->SizeOfData); //Interlacing has to be removed after the image was copied (line above) if (OldImageDesc.ImageInfo & (1 << 6)) { // Image is interlaced. if (!RemoveInterlace(Image)) goto error_clean; } Image = Image->Next; Image->Format = IL_COLOUR_INDEX; Image->Origin = IL_ORIGIN_UPPER_LEFT; } else { BaseImage = IL_FALSE; if (!Gfx.Used && Gfx.Packed & 0x1) memset(Image->Data, Gfx.Transparent, Image->SizeOfData); else memset(Image->Data, GifHead->Background, Image->SizeOfData); //memset(Image->Data, GifHead->Background, Image->SizeOfData); } Image->OffX = ImageDesc.OffX; Image->OffY = ImageDesc.OffY; // Check to see if the image has its own palette. if (ImageDesc.ImageInfo & (1 << 7)) { if (!iGetPalette(ImageDesc.ImageInfo, &Image->Pal)) { goto error_clean; } } else { if (!iCopyPalette(&Image->Pal, GlobalPal)) { goto error_clean; } } if (!GifGetData(Image->Data + ImageDesc.OffX + ImageDesc.OffY*Image->Width, Image->SizeOfData, ImageDesc.Width, ImageDesc.Height, Image->Width, &Gfx)) { ilSetError(IL_ILLEGAL_FILE_VALUE); goto error_clean; } // See if there was a valid graphics control extension. if (!Gfx.Used) { Gfx.Used = IL_TRUE; Image->Duration = Gfx.Delay * 10; // We want it in milliseconds. // See if a transparent colour is defined. if (Gfx.Packed & 1) { if (!ConvertTransparent(Image, Gfx.Transparent)) { goto error_clean; } } } i = itell(); // Terminates each block. if((input = igetc()) == IL_EOF) goto error_clean; if (input != 0x00) iseek(-1, IL_SEEK_CUR); // break; OldImageDesc = ImageDesc; } //Deinterlace last image if (OldImageDesc.ImageInfo & (1 << 6)) { // Image is interlaced. if (!RemoveInterlace(Image)) goto error_clean; } iCurImage->NumNext = NumImages; if (BaseImage) // Was not able to load any images in... return IL_FALSE; return IL_TRUE; error_clean: Image = iCurImage->Next; while (Image) { TempImage = Image; Image = Image->Next; ilCloseImage(TempImage); } return IL_FALSE; }
// Internal function used to load the BLP. ILboolean iLoadBlpInternal(void) { BLP2HEAD Header; ILubyte *CompData; ILimage *Image; ILuint Mip, j, x, CompSize, AlphaSize, AlphaOff; ILint y; ILboolean BaseCreated = IL_FALSE; ILubyte *DataAndAlpha = NULL, *Palette = NULL, AlphaMask; //, *JpegHeader, *JpegData; if (iCurImage == NULL) { ilSetError(IL_ILLEGAL_OPERATION); return IL_FALSE; } if (!iGetBlp2Head(&Header)) { ilSetError(IL_INVALID_FILE_HEADER); return IL_FALSE; } if (!iCheckBlp2(&Header)) { goto check_blp1; } //@TODO: Remove this! if (Header.Type != BLP_TYPE_DXTC_RAW) return IL_FALSE; switch (Header.Compression) { case BLP_RAW: for (Mip = 0; Mip < 16; Mip++) { // Possible maximum of 16 mipmaps if (BaseCreated) { if (Header.HasMips == 0) // Does not have mipmaps, so we are done. break; if (Image->Width == 1 && Image->Height == 1) // Already at the smallest mipmap (1x1), so we are done. break; if (Header.MipOffsets[Mip] == 0 || Header.MipLengths == 0) // No more mipmaps in the file. break; } switch (Header.AlphaBits) { case 0: if (!BaseCreated) { // Have not created the base image yet, so use ilTexImage. if (!ilTexImage(Header.Width, Header.Height, 1, 1, IL_COLOUR_INDEX, IL_UNSIGNED_BYTE, NULL)) return IL_FALSE; Image = iCurImage; BaseCreated = IL_TRUE; Image->Pal.Palette = (ILubyte*)ialloc(256 * 4); // 256 entries of ARGB8888 values (1024). if (Image->Pal.Palette == NULL) return IL_FALSE; Image->Pal.PalSize = 1024; Image->Pal.PalType = IL_PAL_BGRA32; //@TODO: Find out if this is really BGRA data. if (iread(Image->Pal.Palette, 1, 1024) != 1024) // Read in the palette. return IL_FALSE; } else { Image->Mipmaps = ilNewImageFull(Image->Width >> 1, Image->Height >> 1, 1, 1, IL_COLOUR_INDEX, IL_UNSIGNED_BYTE, NULL); if (Image->Mipmaps == NULL) return IL_FALSE; // Copy the palette from the first image before we change our Image pointer. iCopyPalette(&Image->Mipmaps->Pal, &Image->Pal); // Move to the next mipmap in the linked list. Image = Image->Mipmaps; } // The origin should be in the upper left. Image->Origin = IL_ORIGIN_UPPER_LEFT; // These two should be the same (tells us how much data is in the file for this mipmap level). if (Header.MipLengths[Mip] != Image->SizeOfData) { ilSetError(IL_INVALID_FILE_HEADER); return IL_FALSE; } // Finally read in the image data. iseek(Header.MipOffsets[Mip], IL_SEEK_SET); if (iread(Image->Data, 1, Image->SizeOfData) != Image->SizeOfData) return IL_FALSE; break; case 1: if (!BaseCreated) { // Have not created the base image yet, so use ilTexImage. if (!ilTexImage(Header.Width, Header.Height, 1, 4, IL_BGRA, IL_UNSIGNED_BYTE, NULL)) return IL_FALSE; Image = iCurImage; BaseCreated = IL_TRUE; Palette = (ILubyte*)ialloc(256 * 4); if (Palette == NULL) return IL_FALSE; // Read in the palette. if (iread(Palette, 1, 1024) != 1024) { ifree(Palette); return IL_FALSE; } // We only allocate this once and reuse this buffer with every mipmap (since successive ones are smaller). DataAndAlpha = (ILubyte*)ialloc(Image->Width * Image->Height); if (DataAndAlpha == NULL) { ifree(DataAndAlpha); ifree(Palette); return IL_FALSE; } } else { Image->Mipmaps = ilNewImageFull(Image->Width >> 1, Image->Height >> 1, 1, 4, IL_BGRA, IL_UNSIGNED_BYTE, NULL); if (Image->Mipmaps == NULL) return IL_FALSE; // Move to the next mipmap in the linked list. Image = Image->Mipmaps; } // The origin should be in the upper left. Image->Origin = IL_ORIGIN_UPPER_LEFT; // Determine the size of the alpha data following the color indices. AlphaSize = Image->Width * Image->Height / 8; if (AlphaSize == 0) AlphaSize = 1; // Should never be 0. // These two should be the same (tells us how much data is in the file for this mipmap level). if (Header.MipLengths[Mip] != Image->SizeOfData / 4 + AlphaSize) { ilSetError(IL_INVALID_FILE_HEADER); return IL_FALSE; } // Seek to the data and read it. iseek(Header.MipOffsets[Mip], IL_SEEK_SET); if (iread(DataAndAlpha, Image->Width * Image->Height, 1) != 1) { ifree(DataAndAlpha); ifree(Palette); return IL_FALSE; } // Convert the color-indexed data to BGRX. for (j = 0; j < Image->Width * Image->Height; j++) { Image->Data[j*4] = Palette[DataAndAlpha[j]*4]; Image->Data[j*4+1] = Palette[DataAndAlpha[j]*4+1]; Image->Data[j*4+2] = Palette[DataAndAlpha[j]*4+2]; } // Read in the alpha list. if (iread(DataAndAlpha, AlphaSize, 1) != 1) { ifree(DataAndAlpha); ifree(Palette); return IL_FALSE; } AlphaMask = 0x01; // Lowest bit AlphaOff = 0; // The really strange thing about this alpha data is that it is upside-down when compared to the // regular color-indexed data, so we have to flip it. for (y = Image->Height - 1; y >= 0; y--) { for (x = 0; x < Image->Width; x++) { if (AlphaMask == 0) { // Shifting it past the highest bit makes it 0, since we only have 1 byte. AlphaOff++; // Move along the alpha buffer. AlphaMask = 0x01; // Reset the alpha mask. } // This is just 1-bit alpha, so it is either on or off. Image->Data[Image->Bps * y + x * 4 + 3] = DataAndAlpha[AlphaOff] & AlphaMask ? 0xFF : 0x00; AlphaMask <<= 1; } } break; default: //@TODO: Accept any other alpha values? ilSetError(IL_INVALID_FILE_HEADER); return IL_FALSE; } } // Done, so we can finally free these two. ifree(DataAndAlpha); ifree(Palette); break; case BLP_DXTC: for (Mip = 0; Mip < 16; Mip++) { // Possible maximum of 16 mipmaps //@TODO: Other formats //if (Header.AlphaBits == 0) // if (!ilTexImage(Header.Width, Header.Height, 1, 3, IL_RGB, IL_UNSIGNED_BYTE, NULL)) // return IL_FALSE; if (!BaseCreated) { // Have not created the base image yet, so use ilTexImage. if (!ilTexImage(Header.Width, Header.Height, 1, 4, IL_RGBA, IL_UNSIGNED_BYTE, NULL)) return IL_FALSE; Image = iCurImage; BaseCreated = IL_TRUE; } else { if (Header.HasMips == 0) // Does not have mipmaps, so we are done. break; if (Image->Width == 1 && Image->Height == 1) // Already at the smallest mipmap (1x1), so we are done. break; if (Header.MipOffsets[Mip] == 0 || Header.MipLengths[Mip] == 0) // No more mipmaps in the file. break; //@TODO: Other formats // ilNewImageFull automatically changes widths and heights of 0 to 1, so we do not have to worry about it. Image->Mipmaps = ilNewImageFull(Image->Width >> 1, Image->Height >> 1, 1, 4, IL_RGBA, IL_UNSIGNED_BYTE, NULL); if (Image->Mipmaps == NULL) return IL_FALSE; Image = Image->Mipmaps; } // The origin should be in the upper left. Image->Origin = IL_ORIGIN_UPPER_LEFT; //@TODO: Only do the allocation once. CompData = (ILubyte*)ialloc(Header.MipLengths[Mip]); if (CompData == NULL) return IL_FALSE; // Read in the compressed mipmap data. iseek(Header.MipOffsets[Mip], IL_SEEK_SET); if (iread(CompData, 1, Header.MipLengths[Mip]) != Header.MipLengths[Mip]) { ifree(CompData); return IL_FALSE; } switch (Header.AlphaBits) { case 0: // DXT1 without alpha case 1: // DXT1 with alpha // Check to make sure that the MipLength reported is the size needed, so that // DecompressDXT1 does not crash. CompSize = ((Image->Width + 3) / 4) * ((Image->Height + 3) / 4) * 8; if (CompSize != Header.MipLengths[Mip]) { ilSetError(IL_INVALID_FILE_HEADER); ifree(CompData); return IL_FALSE; } if (!DecompressDXT1(Image, CompData)) { ifree(CompData); return IL_FALSE; } break; case 8: // Check to make sure that the MipLength reported is the size needed, so that // DecompressDXT3/5 do not crash. CompSize = ((Image->Width + 3) / 4) * ((Image->Height + 3) / 4) * 16; if (CompSize != Header.MipLengths[Mip]) { ifree(CompData); ilSetError(IL_INVALID_FILE_HEADER); return IL_FALSE; } switch (Header.AlphaType) { case 0: // All three of case 1: // these refer to case 8: // DXT3... if (!DecompressDXT3(Image, CompData)) { ifree(CompData); return IL_FALSE; } break; case 7: // DXT5 compression if (!DecompressDXT5(Image, CompData)) { ifree(CompData); return IL_FALSE; } break; //default: // Should already be checked by iCheckBlp2. } break; //default: // Should already be checked by iCheckBlp2. } //@TODO: Save DXTC data. ifree(CompData); } break; //default: } return ilFixImage(); check_blp1: iseek(-148, IL_SEEK_CUR); // Go back the size of the BLP2 header, since we tried reading it. return iLoadBlp1(); }