| // ========================================================== |
| // TARGA Loader and Writer |
| // |
| // Design and implementation by |
| // - Floris van den Berg (flvdberg@wxs.nl) |
| // - Jani Kajala (janik@remedy.fi) |
| // - Martin Weber (martweb@gmx.net) |
| // - Machiel ten Brinke (brinkem@uni-one.nl) |
| // - Peter Lemmens (peter.lemmens@planetinternet.be) |
| // - Hervé Drolon (drolon@infonie.fr) |
| // - Mihail Naydenov (mnaydenov@users.sourceforge.net) |
| // |
| // This file is part of FreeImage 3 |
| // |
| // COVERED CODE IS PROVIDED UNDER THIS LICENSE ON AN "AS IS" BASIS, WITHOUT WARRANTY |
| // OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, WITHOUT LIMITATION, WARRANTIES |
| // THAT THE COVERED CODE IS FREE OF DEFECTS, MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE |
| // OR NON-INFRINGING. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE COVERED |
| // CODE IS WITH YOU. SHOULD ANY COVERED CODE PROVE DEFECTIVE IN ANY RESPECT, YOU (NOT |
| // THE INITIAL DEVELOPER OR ANY OTHER CONTRIBUTOR) ASSUME THE COST OF ANY NECESSARY |
| // SERVICING, REPAIR OR CORRECTION. THIS DISCLAIMER OF WARRANTY CONSTITUTES AN ESSENTIAL |
| // PART OF THIS LICENSE. NO USE OF ANY COVERED CODE IS AUTHORIZED HEREUNDER EXCEPT UNDER |
| // THIS DISCLAIMER. |
| // |
| // Use at your own risk! |
| // ========================================================== |
| |
| #include "FreeImage.h" |
| #include "Utilities.h" |
| |
| // ---------------------------------------------------------- |
| // Constants + headers |
| // ---------------------------------------------------------- |
| |
| #ifdef _WIN32 |
| #pragma pack(push, 1) |
| #else |
| #pragma pack(1) |
| #endif |
| |
| typedef struct tagTGAHEADER { |
| BYTE id_length; // ID length |
| BYTE color_map_type; // color map type |
| BYTE image_type; // image type |
| |
| WORD cm_first_entry; // first entry index |
| WORD cm_length; // color map length |
| BYTE cm_size; // color map entry size, in bits |
| |
| WORD is_xorigin; // X-origin of image |
| WORD is_yorigin; // Y-origin of image |
| WORD is_width; // image width |
| WORD is_height; // image height |
| BYTE is_pixel_depth; // pixel depth |
| BYTE is_image_descriptor; // image descriptor |
| } TGAHEADER; |
| |
| typedef struct tagTGAFOOTER { |
| DWORD extension_offset; // extension area offset |
| DWORD developer_offset; // developer directory offset |
| char signature[18]; // signature string |
| } TGAFOOTER; |
| |
| #ifdef _WIN32 |
| #pragma pack(pop) |
| #else |
| #pragma pack() |
| #endif |
| |
| // ---------------------------------------------------------- |
| // Image type |
| // |
| #define TGA_NULL 0 // no image data included |
| #define TGA_CMAP 1 // uncompressed, color-mapped image |
| #define TGA_RGB 2 // uncompressed, true-color image |
| #define TGA_MONO 3 // uncompressed, black-and-white image |
| #define TGA_RLECMAP 9 // run-length encoded, color-mapped image |
| #define TGA_RLERGB 10 // run-length encoded, true-color image |
| #define TGA_RLEMONO 11 // run-length encoded, black-and-white image |
| #define TGA_CMPCMAP 32 // compressed (Huffman/Delta/RLE) color-mapped image (e.g., VDA/D) - Obsolete |
| #define TGA_CMPCMAP4 33 // compressed (Huffman/Delta/RLE) color-mapped four pass image (e.g., VDA/D) - Obsolete |
| |
| |
| // ========================================================== |
| // Internal functions |
| // ========================================================== |
| |
| /** |
| This struct is used only when loading RLE compressed images. |
| It is needed because it is (really) hard to determine the size of a |
| compressed line in the file (and allocate line cache as usual, refilling it at line change). |
| We use an arbitrary size instead and access it through this struct, it takes care to refill when needed. |
| NOTE: access must be *fast*, so safety measures are minimal. |
| */ |
| typedef struct tagCacheIO { |
| BYTE *ptr; |
| BYTE *home; |
| BYTE *end; |
| size_t size; |
| FreeImageIO *io; // not necessary, but |
| fi_handle handle; // passing them as args is slower |
| } CacheIO; |
| |
| /** |
| Returns TRUE on success and FAlSE if malloc fails |
| Note however that I do not use this returned value in the code. |
| Allocating line cache even for a 100 000 wide 32bit bitmap will take under |
| half a megabyte. Out of Mem is really not an issue! |
| */ |
| static BOOL |
| cacheIO_alloc(CacheIO *ch, FreeImageIO *io, fi_handle handle, size_t size) { |
| ch->home = NULL; |
| ch->home = (BYTE*)malloc(size); |
| if(ch->home == NULL) { |
| return FALSE; |
| } |
| ch->end = ch->home + size; |
| ch->size = size; |
| ch->io = io; |
| ch->handle = handle; |
| ch->ptr = ch->end; //will force refill on first access |
| |
| return TRUE; |
| } |
| |
| static void |
| cacheIO_free(CacheIO *ch) { |
| if(ch->home != NULL) { |
| free(ch->home); |
| } |
| } |
| |
| inline static BYTE |
| cacheIO_getByte(CacheIO *ch) { |
| if(ch->ptr >= ch->end) { |
| ch->ptr = ch->home; |
| ch->io->read_proc(ch->ptr, sizeof(BYTE), (unsigned)ch->size, ch->handle);//### EOF - no problem? |
| } |
| BYTE result = *ch->ptr; |
| ch->ptr++; |
| |
| return result; |
| } |
| |
| inline static BYTE* |
| cacheIO_getBytes(CacheIO *ch, size_t count /*must be < ch.size!*/) { |
| if(ch->ptr + count >= ch->end) { |
| // 'count' bytes might span two cache bounds, SEEK back to add them in the new cache |
| long read = (long)(ch->ptr - ch->home); |
| ch->io->seek_proc(ch->handle, -(((long)ch->size - read)), SEEK_CUR); |
| ch->ptr = ch->home; |
| ch->io->read_proc(ch->ptr, sizeof(BYTE), (unsigned)ch->size, ch->handle);//### EOF - no problem? |
| } |
| BYTE *result = ch->ptr; |
| ch->ptr += count; |
| |
| return result; |
| } |
| |
| static BYTE * |
| Internal_GetScanLine(FIBITMAP *dib, int scanline, int flipvert) { |
| //assert ((scanline >= 0) && (scanline < (int)FreeImage_GetHeight(dib))); |
| |
| if (flipvert) { |
| return FreeImage_GetScanLine(dib, scanline); |
| } else { |
| return FreeImage_GetScanLine(dib, FreeImage_GetHeight(dib) - scanline - 1); |
| } |
| } |
| |
| #ifdef FREEIMAGE_BIGENDIAN |
| static void |
| SwapHeader(TGAHEADER *header) { |
| SwapShort(&header->cm_first_entry); |
| SwapShort(&header->cm_length); |
| SwapShort(&header->is_xorigin); |
| SwapShort(&header->is_yorigin); |
| SwapShort(&header->is_width); |
| SwapShort(&header->is_height); |
| } |
| |
| static void |
| SwapFooter(TGAFOOTER *footer) { |
| SwapLong(&footer->extension_offset); |
| SwapLong(&footer->developer_offset); |
| } |
| #endif |
| |
| // ========================================================== |
| // Plugin Interface |
| // ========================================================== |
| |
| static int s_format_id; |
| |
| // ========================================================== |
| // Plugin Implementation |
| // ========================================================== |
| |
| static const char * DLL_CALLCONV |
| Format() { |
| return "TARGA"; |
| } |
| |
| static const char * DLL_CALLCONV |
| Description() { |
| return "Truevision Targa"; |
| } |
| |
| static const char * DLL_CALLCONV |
| Extension() { |
| return "tga,targa"; |
| } |
| |
| static const char * DLL_CALLCONV |
| RegExpr() { |
| return NULL; |
| } |
| |
| static const char * DLL_CALLCONV |
| MimeType() { |
| return "image/freeimage-tga"; |
| } |
| |
| static BOOL DLL_CALLCONV |
| Validate(FreeImageIO *io, fi_handle handle) { |
| TGAHEADER header; |
| char extra[256]; // 256 temporary bytes (only 255 will be used though) |
| |
| // try to read the header in a whole |
| if(io->read_proc(&header, sizeof(tagTGAHEADER), 1, handle) != 1) |
| return FALSE; |
| |
| #ifdef FREEIMAGE_BIGENDIAN |
| SwapHeader(&header); |
| #endif |
| |
| // The Color Map Type should be a 0 or a 1... |
| // NOTE: are other values possible? |
| // NO, according to http://cvs.sf.net/viewcvs.py/eifogl/eifogl/utility/tga/tga_file.e?rev=1.3 |
| // and it seems that the current Targa implementation for FreeImage |
| // assumes that anything other than 0 means that there is a Color Map |
| if(header.color_map_type != 0 && header.color_map_type != 1) { |
| return FALSE; |
| } |
| |
| // If the Color Map Type is 1 then we validate the map entry information... |
| // NOTA: let's stay compatible with the current FreeImage Targa implementation |
| // and check against Type 0 instead against Type 1 |
| if(header.color_map_type != 0) { |
| // It doesn't make any sense if the first entry is larger than the Color Map Table |
| if(header.cm_first_entry >= header.cm_length) |
| return FALSE; |
| |
| // NOTE : maybe we should check header.cm_size for known values? |
| // for now, don't allow 0 or anything bigger than 32 |
| if(header.cm_size <= 0 || header.cm_size > 32) |
| return FALSE; |
| } |
| else { |
| // I have disabled this because I'm not really sure |
| // but can one assume that if there is no Color Map |
| // than all 3 related values are zeroed? |
| // NOTE: atleast in my test files that seems to be the case... |
| /* |
| if(header.cm_first_entry != 0 || header.cm_length != 0 || header.cm_size != 0) |
| return FALSE; |
| */ |
| } |
| |
| // the width/height shouldn't be 0, right? |
| if(header.is_width == 0 || header.is_height == 0) { |
| return FALSE; |
| } |
| |
| // the extra data (following after the header) should be there |
| if(io->read_proc(extra, 1, header.id_length, handle) != header.id_length) |
| return FALSE; |
| |
| // let's now verify all the types that are supported by FreeImage |
| // NOTE : this is our final verification |
| switch(header.is_pixel_depth) { |
| case 8: |
| switch(header.image_type) { |
| case TGA_CMAP: |
| case TGA_MONO: |
| case TGA_RLECMAP: |
| case TGA_RLEMONO: return TRUE; |
| } |
| break; |
| case 15: |
| case 16: |
| case 24: |
| case 32: |
| switch(header.image_type) { |
| case TGA_RGB: |
| case TGA_RLERGB: return TRUE; |
| } |
| } |
| |
| return FALSE; |
| } |
| |
| static BOOL DLL_CALLCONV |
| SupportsExportDepth(int depth) { |
| return ( |
| (depth == 8) || |
| (depth == 16) || |
| (depth == 24) || |
| (depth == 32) |
| ); |
| } |
| |
| static BOOL DLL_CALLCONV |
| SupportsExportType(FREE_IMAGE_TYPE type) { |
| return (type == FIT_BITMAP) ? TRUE : FALSE; |
| } |
| |
| // ---------------------------------------------------------- |
| |
| static FIBITMAP * DLL_CALLCONV |
| Load(FreeImageIO *io, fi_handle handle, int page, int flags, void *data) { |
| if (handle) { |
| try { |
| // remember the start offset |
| long start_offset = io->tell_proc(handle); |
| |
| // remember end-of-file (used for RLE cache) |
| io->seek_proc(handle, 0, SEEK_END); |
| long eof = io->tell_proc(handle); |
| io->seek_proc(handle, start_offset, SEEK_SET ); |
| |
| // read and process the bitmap's header |
| |
| FIBITMAP *dib = NULL; |
| TGAHEADER header; |
| |
| io->read_proc(&header, sizeof(tagTGAHEADER), 1, handle); |
| |
| #ifdef FREEIMAGE_BIGENDIAN |
| SwapHeader(&header); |
| #endif |
| |
| int line = CalculateLine(header.is_width, header.is_pixel_depth); |
| int pitch = CalculatePitch(line); |
| // It seems this ALWAYS is: 8 for 32bit, 1 for 16bit, 0 for 24bit |
| int alphabits = header.is_image_descriptor & 0x0f; |
| int fliphoriz = (header.is_image_descriptor & 0x10) ? 0 : 1; //currently FreeImage improperly treats this as flipvert also |
| int flipvert = (header.is_image_descriptor & 0x20) ? 1 : 0; |
| |
| // skip comment |
| io->seek_proc(handle, header.id_length, SEEK_CUR); |
| |
| switch (header.is_pixel_depth) { |
| case 8 : |
| { |
| dib = FreeImage_Allocate(header.is_width, header.is_height, 8); |
| |
| if (dib == NULL) { |
| throw FI_MSG_ERROR_DIB_MEMORY; |
| } |
| |
| // read the palette |
| |
| RGBQUAD *palette = FreeImage_GetPalette(dib); |
| |
| if (header.color_map_type == 0) { |
| // no color-map data is included with this image ... |
| // build a greyscale palette |
| for (unsigned i = 0; i < 256; i++) { |
| palette[i].rgbRed = (BYTE)i; |
| palette[i].rgbGreen = (BYTE)i; |
| palette[i].rgbBlue = (BYTE)i; |
| } |
| } |
| else { |
| unsigned count, csize; |
| |
| // calculate the color map size |
| csize = header.cm_length * header.cm_size / 8; |
| BYTE *cmap = (BYTE*)malloc(csize * sizeof(BYTE)); |
| |
| io->read_proc(cmap, sizeof(BYTE), csize, handle); |
| |
| // build the palette |
| switch(header.cm_size) { |
| case 16: |
| { |
| WORD *rgb555 = (WORD*)&cmap[0]; |
| for (count = header.cm_first_entry; count < header.cm_length; count++) { |
| palette[count].rgbRed = (BYTE)((((*rgb555 & FI16_555_RED_MASK) >> FI16_555_RED_SHIFT) * 0xFF) / 0x1F); |
| palette[count].rgbGreen = (BYTE)((((*rgb555 & FI16_555_GREEN_MASK) >> FI16_555_GREEN_SHIFT) * 0xFF) / 0x1F); |
| palette[count].rgbBlue = (BYTE)((((*rgb555 & FI16_555_BLUE_MASK) >> FI16_555_BLUE_SHIFT) * 0xFF) / 0x1F); |
| rgb555++; |
| } |
| } |
| break; |
| |
| case 24: |
| { |
| FILE_BGR *bgr = (FILE_BGR*)&cmap[0]; |
| for (count = header.cm_first_entry; count < header.cm_length; count++) { |
| palette[count].rgbBlue = bgr->b; |
| palette[count].rgbGreen = bgr->g; |
| palette[count].rgbRed = bgr->r; |
| bgr++; |
| } |
| } |
| break; |
| |
| case 32: |
| { |
| BYTE trns[256]; |
| |
| // clear the transparency table |
| memset(trns, 0xFF, 256); |
| |
| FILE_BGRA *bgra = (FILE_BGRA*)&cmap[0]; |
| for (count = header.cm_first_entry; count < header.cm_length; count++) { |
| palette[count].rgbBlue = bgra->b; |
| palette[count].rgbGreen = bgra->g; |
| palette[count].rgbRed = bgra->r; |
| // alpha |
| trns[count] = bgra->a; |
| bgra++; |
| } |
| |
| // set the tranparency table |
| FreeImage_SetTransparencyTable(dib, trns, 256); |
| } |
| break; |
| } |
| |
| free(cmap); |
| } |
| |
| // read in the bitmap bits |
| |
| switch (header.image_type) { |
| case TGA_CMAP: |
| case TGA_MONO: |
| { |
| BYTE *bits = NULL; |
| |
| if (fliphoriz) { |
| for (unsigned count = 0; count < header.is_height; count++) { |
| bits = Internal_GetScanLine(dib, header.is_height - count - 1, flipvert); |
| io->read_proc(bits, sizeof(BYTE), line, handle); |
| } |
| } |
| else { |
| for (unsigned count = 0; count < header.is_height; count++) { |
| bits = Internal_GetScanLine(dib, count, flipvert); |
| io->read_proc(bits, sizeof(BYTE), line, handle); |
| } |
| } |
| |
| break; |
| } |
| |
| case TGA_RLECMAP: |
| case TGA_RLEMONO: //(8 bit) |
| { |
| BYTE rle = 0; |
| BYTE *bits; |
| |
| // Compute the *rough* size of a line... |
| long pixels_offset = io->tell_proc(handle); |
| long sz = ((eof - pixels_offset) / header.is_height); |
| |
| // ...and allocate cache of this size (yields best results) |
| CacheIO cache; |
| cacheIO_alloc(&cache, io, handle, sz); |
| |
| int y = 0, x = 0; |
| |
| if (fliphoriz) { |
| bits = Internal_GetScanLine(dib, header.is_height - y - 1, flipvert); |
| } else { |
| bits = Internal_GetScanLine(dib, y, flipvert); |
| } |
| |
| while(y < header.is_height) { |
| |
| rle = cacheIO_getByte(&cache); |
| |
| BOOL has_rle = rle & 0x80; |
| rle &= ~0x80; // remove type-bit |
| |
| BYTE rle_count = rle + 1; |
| |
| if (has_rle) { |
| |
| BYTE val = cacheIO_getByte(&cache); |
| |
| for(int ix = 0; ix < rle_count; ix++) { |
| bits[x++] = val; |
| |
| if(x >= line){ |
| x = 0; |
| y++; |
| if (fliphoriz) { |
| bits = Internal_GetScanLine(dib, header.is_height - y - 1, flipvert); |
| } else { |
| bits = Internal_GetScanLine(dib, y, flipvert); |
| } |
| } |
| } |
| |
| } else { // !has_rle |
| |
| for(int ix = 0; ix < rle_count; ix++) { |
| |
| BYTE val = cacheIO_getByte(&cache); |
| bits[x++] = val; |
| if(x >= line){ |
| x=0; |
| y++; |
| if (fliphoriz) { |
| bits = Internal_GetScanLine(dib, header.is_height - y - 1, flipvert); |
| } else { |
| bits = Internal_GetScanLine(dib, y, flipvert); |
| } |
| } |
| }//< rle_count |
| }//< has_rle |
| }//< while y |
| |
| cacheIO_free(&cache); |
| break; |
| } |
| |
| default : |
| FreeImage_Unload(dib); |
| return NULL; |
| } |
| |
| break; |
| } |
| |
| case 15 : |
| case 16 : |
| { |
| int pixel_bits; |
| |
| // allocate the dib |
| |
| if (TARGA_LOAD_RGB888 & flags) { |
| pixel_bits = 24; |
| dib = FreeImage_Allocate(header.is_width, header.is_height, pixel_bits, FI_RGBA_RED_MASK, FI_RGBA_GREEN_MASK, FI_RGBA_BLUE_MASK); |
| } else { |
| pixel_bits = 16; |
| dib = FreeImage_Allocate(header.is_width, header.is_height, pixel_bits, FI16_555_RED_MASK, FI16_555_GREEN_MASK, FI16_555_BLUE_MASK); |
| } |
| |
| if (dib == NULL) { |
| throw FI_MSG_ERROR_DIB_MEMORY; |
| } |
| |
| int line = CalculateLine(header.is_width, pixel_bits); |
| |
| const unsigned pixel_size = unsigned(pixel_bits) / 8; |
| |
| // note header.cm_size is a misleading name, it should be seen as header.cm_bits |
| // ignore current position in file and set filepointer explicitly from the beginning of the file |
| |
| int garblen = 0; |
| |
| if (header.color_map_type != 0) { |
| garblen = (int)((header.cm_size + 7) / 8) * header.cm_length; /* should byte align */ |
| } else { |
| garblen = 0; |
| } |
| |
| io->seek_proc(handle, start_offset, SEEK_SET); |
| io->seek_proc(handle, sizeof(tagTGAHEADER) + header.id_length + garblen, SEEK_SET); |
| |
| // read in the bitmap bits |
| |
| switch (header.image_type) { |
| case TGA_RGB: //(16 bit) |
| { |
| // in(put)_line cache |
| WORD *in_line = (WORD*)malloc(header.is_width * sizeof(WORD)); |
| if(!in_line) throw FI_MSG_ERROR_MEMORY; |
| |
| const int h = header.is_height; |
| for (int y = 0; y < h; y++) { |
| BYTE *bits; |
| |
| if (fliphoriz) { |
| bits = Internal_GetScanLine(dib, h - y - 1, flipvert); |
| } else { |
| bits = Internal_GetScanLine(dib, y, flipvert); |
| } |
| io->read_proc(in_line, sizeof(WORD), header.is_width, handle); |
| |
| WORD *pixel = in_line; |
| for (int x = 0; x < line; x += pixel_size) { |
| |
| #ifdef FREEIMAGE_BIGENDIAN |
| SwapShort(pixel); |
| #endif |
| |
| if (TARGA_LOAD_RGB888 & flags) { |
| bits[x + FI_RGBA_BLUE] = (BYTE)((((*pixel & FI16_555_BLUE_MASK) >> FI16_555_BLUE_SHIFT) * 0xFF) / 0x1F); |
| bits[x + FI_RGBA_GREEN] = (BYTE)((((*pixel & FI16_555_GREEN_MASK) >> FI16_555_GREEN_SHIFT) * 0xFF) / 0x1F); |
| bits[x + FI_RGBA_RED] = (BYTE)((((*pixel & FI16_555_RED_MASK) >> FI16_555_RED_SHIFT) * 0xFF) / 0x1F); |
| } else { |
| *reinterpret_cast<WORD*>(bits + x) = 0x7FFF & *pixel; |
| } |
| pixel++; |
| } |
| } |
| |
| free(in_line); |
| break; |
| } |
| |
| case TGA_RLERGB: //(16 bit) |
| { |
| BYTE rle; |
| BYTE *bits; |
| |
| // Compute the *rough* size of a line... |
| long pixels_offset = io->tell_proc(handle); |
| long sz = ((eof - pixels_offset) / header.is_height); |
| |
| // ...and allocate cache of this size (yields best results) |
| CacheIO cache; |
| cacheIO_alloc(&cache, io, handle, sz); |
| |
| int y = 0, x = 0; |
| |
| if (fliphoriz) { |
| bits = Internal_GetScanLine(dib, header.is_height - y - 1, flipvert); |
| } else { |
| bits = Internal_GetScanLine(dib, y, flipvert); |
| } |
| |
| while( y < header.is_height) { |
| rle = cacheIO_getByte(&cache); |
| |
| BOOL has_rle = rle & 0x80; |
| rle &= ~0x80; //remove type-bit |
| |
| int rle_count = rle + 1; |
| |
| if (has_rle) { |
| |
| WORD *val = (WORD*)cacheIO_getBytes(&cache, sizeof(WORD)); |
| #ifdef FREEIMAGE_BIGENDIAN |
| SwapShort(val); |
| #endif |
| for (int ix = 0; ix < rle_count; ix++) { |
| if (TARGA_LOAD_RGB888 & flags) { |
| bits[x + FI_RGBA_BLUE] = (BYTE)((((*val & FI16_555_BLUE_MASK) >> FI16_555_BLUE_SHIFT) * 0xFF) / 0x1F); |
| bits[x + FI_RGBA_GREEN] = (BYTE)((((*val & FI16_555_GREEN_MASK) >> FI16_555_GREEN_SHIFT) * 0xFF) / 0x1F); |
| bits[x + FI_RGBA_RED] = (BYTE)((((*val & FI16_555_RED_MASK) >> FI16_555_RED_SHIFT) * 0xFF) / 0x1F); |
| } else { |
| *reinterpret_cast<WORD *>(bits + x) = 0x7FFF & *val; |
| } |
| |
| x += pixel_size; |
| |
| if(x >= line){ |
| x = 0; |
| y++; |
| |
| if (fliphoriz) { |
| bits = Internal_GetScanLine(dib, header.is_height - y - 1, flipvert); |
| } else { |
| bits = Internal_GetScanLine(dib, y, flipvert); |
| } |
| } |
| } |
| |
| } else { |
| |
| for (int ix = 0; ix < rle_count; ix++) { |
| WORD *val = (WORD*)cacheIO_getBytes(&cache, sizeof(WORD)); |
| |
| #ifdef FREEIMAGE_BIGENDIAN |
| SwapShort(val); |
| #endif |
| |
| if (TARGA_LOAD_RGB888 & flags) { |
| bits[x + FI_RGBA_BLUE] = (BYTE)((((*val & FI16_555_BLUE_MASK) >> FI16_555_BLUE_SHIFT) * 0xFF) / 0x1F); |
| bits[x + FI_RGBA_GREEN] = (BYTE)((((*val & FI16_555_GREEN_MASK) >> FI16_555_GREEN_SHIFT) * 0xFF) / 0x1F); |
| bits[x + FI_RGBA_RED] = (BYTE)((((*val & FI16_555_RED_MASK) >> FI16_555_RED_SHIFT) * 0xFF) / 0x1F); |
| } else { |
| *reinterpret_cast<WORD *>(bits + x) = 0x7FFF & *val; |
| } |
| |
| x += pixel_size; |
| |
| if(x >= line){ |
| x = 0; |
| y++; |
| if (fliphoriz) { |
| bits = Internal_GetScanLine(dib, header.is_height - y - 1, flipvert); |
| } else { |
| bits = Internal_GetScanLine(dib, y, flipvert); |
| } |
| } |
| |
| }//< rle_count |
| }//< has_rle |
| }//< while |
| |
| cacheIO_free(&cache); |
| break; |
| } |
| |
| default : |
| FreeImage_Unload(dib); |
| return NULL; |
| } |
| |
| break; |
| } |
| |
| case 24 : |
| { |
| dib = FreeImage_Allocate(header.is_width, header.is_height, 24, FI_RGBA_RED_MASK, FI_RGBA_GREEN_MASK, FI_RGBA_BLUE_MASK); |
| |
| if (dib == NULL) { |
| throw FI_MSG_ERROR_DIB_MEMORY; |
| } |
| |
| // read in the bitmap bits |
| |
| switch (header.image_type) { |
| case TGA_RGB://(24 bit) |
| { |
| FILE_BGR* bgr_line = (FILE_BGR*)malloc(header.is_width * sizeof(FILE_BGR)); |
| if(!bgr_line) throw FI_MSG_ERROR_MEMORY; |
| |
| if (fliphoriz) { |
| for (unsigned count = header.is_height; count > 0; count--) { |
| BYTE *bits = Internal_GetScanLine(dib, count-1, flipvert); |
| io->read_proc(bgr_line, sizeof(FILE_BGR), header.is_width, handle); |
| |
| FILE_BGR *bgr = bgr_line; |
| for (int x = 0; x < line; x += 3) { |
| bits[x + FI_RGBA_BLUE] = bgr->b; |
| bits[x + FI_RGBA_GREEN] = bgr->g; |
| bits[x + FI_RGBA_RED] = bgr->r; |
| bgr++; |
| } |
| } |
| |
| } else { |
| for (unsigned count = 0; count < header.is_height; count++) { |
| BYTE *bits = Internal_GetScanLine(dib, count, flipvert); |
| io->read_proc(bgr_line, sizeof(FILE_BGR), header.is_width, handle); |
| |
| FILE_BGR *bgr = bgr_line; |
| for (int x = 0; x < line; x += 3) { |
| bits[x + FI_RGBA_BLUE] = bgr->b; |
| bits[x + FI_RGBA_GREEN] = bgr->g; |
| bits[x + FI_RGBA_RED] = bgr->r; |
| bgr++; |
| } |
| } |
| } |
| |
| free(bgr_line); |
| break; |
| } |
| |
| case TGA_RLERGB://(24 bit) |
| { |
| |
| BYTE rle; |
| BYTE *bits; |
| |
| // Compute the *rough* size of a line... |
| long pixels_offset = io->tell_proc(handle); |
| long sz = ((eof - pixels_offset) / header.is_height); |
| |
| // ...and allocate cache of this size (yields best results) |
| CacheIO cache; |
| cacheIO_alloc(&cache, io, handle, sz); |
| |
| int x = 0, y = 0; |
| if (fliphoriz) { |
| bits = Internal_GetScanLine(dib, header.is_height - y - 1, flipvert); |
| } else { |
| bits = Internal_GetScanLine(dib, y, flipvert); |
| } |
| |
| while( y < header.is_height) { |
| rle = cacheIO_getByte(&cache); |
| |
| BOOL has_rle = rle & 0x80; |
| rle &= ~0x80; //remove type-bit |
| |
| BYTE rle_count = rle + 1; |
| |
| if (has_rle) { |
| |
| FILE_BGR *val = (FILE_BGR*)cacheIO_getBytes(&cache, sizeof(FILE_BGR)); |
| |
| for (int ix = 0; ix < rle_count; ix++) { |
| bits[x + FI_RGBA_BLUE] = val->b; |
| bits[x + FI_RGBA_GREEN] = val->g; |
| bits[x + FI_RGBA_RED] = val->r; |
| |
| x += 3; |
| |
| if(x >= line){ |
| x = 0; |
| y++; |
| |
| if (fliphoriz) { |
| bits = Internal_GetScanLine(dib, header.is_height - y - 1, flipvert); |
| } else { |
| bits = Internal_GetScanLine(dib, y, flipvert); |
| } |
| } |
| }//<rle_count |
| } else { //<!has_rle |
| |
| for (int ix = 0; ix < rle_count; ix++) { |
| FILE_BGR *val = (FILE_BGR*)cacheIO_getBytes(&cache, sizeof(FILE_BGR)); |
| |
| bits[x + FI_RGBA_BLUE] = val->b; |
| bits[x + FI_RGBA_GREEN] = val->g; |
| bits[x + FI_RGBA_RED] = val->r; |
| |
| x += 3; |
| |
| if(x >= line){ |
| x = 0; |
| y++; |
| |
| if (fliphoriz) { |
| bits = Internal_GetScanLine(dib, header.is_height - y - 1, flipvert); |
| } else { |
| bits = Internal_GetScanLine(dib, y, flipvert); |
| } |
| } |
| |
| }//< rle_count |
| }//< has_rle |
| }//< while |
| |
| cacheIO_free(&cache); |
| break; |
| } |
| |
| default : |
| FreeImage_Unload(dib); |
| return NULL; |
| } |
| |
| break; |
| } |
| |
| case 32 : |
| { |
| int pixel_bits; |
| |
| if (TARGA_LOAD_RGB888 & flags) { |
| pixel_bits = 24; |
| } else { |
| pixel_bits = 32; |
| } |
| |
| const unsigned pixel_size = unsigned (pixel_bits) / 8; |
| |
| // Allocate the DIB |
| dib = FreeImage_Allocate(header.is_width, header.is_height, pixel_bits, FI_RGBA_RED_MASK, FI_RGBA_GREEN_MASK, FI_RGBA_BLUE_MASK); |
| |
| if (dib == NULL) { |
| throw FI_MSG_ERROR_DIB_MEMORY; |
| } |
| |
| // read in the bitmap bits |
| |
| switch (header.image_type) { |
| case TGA_RGB://(32 bit) |
| { |
| // uncompressed |
| |
| // in_line cache |
| FILE_BGRA* in_line = (FILE_BGRA*)malloc(header.is_width * 4); |
| if(!in_line) throw FI_MSG_ERROR_MEMORY; |
| |
| const int w = header.is_width; // yes, it does make a (minor) difference |
| const int h = header.is_height; // to move these outside |
| |
| for (int y = 0; y < h; y++) { |
| BYTE *bits; |
| |
| if (fliphoriz) { |
| bits = Internal_GetScanLine(dib, h - y - 1, flipvert); |
| } else { |
| bits = Internal_GetScanLine(dib, y, flipvert); |
| } |
| |
| io->read_proc(in_line, 4, w, handle); |
| |
| FILE_BGRA *bgra = in_line; |
| for (int x = 0; x < w; x++) { |
| bits[FI_RGBA_BLUE] = bgra->b; |
| bits[FI_RGBA_GREEN] = bgra->g; |
| bits[FI_RGBA_RED] = bgra->r; |
| |
| if ((TARGA_LOAD_RGB888 & flags) != TARGA_LOAD_RGB888) { |
| bits[FI_RGBA_ALPHA] = bgra->a; |
| } |
| |
| bgra++; |
| bits += pixel_size; |
| } |
| } |
| |
| free(in_line); |
| break; |
| } |
| case TGA_RLERGB://(32 bit) |
| { |
| BYTE rle; |
| BYTE *bits; |
| |
| // Compute the *rough* size of a line... |
| long pixels_offset = io->tell_proc(handle); |
| long sz = ((eof - pixels_offset) / header.is_height); |
| |
| // ...and allocate cache of this size (yields best results) |
| CacheIO cache; |
| cacheIO_alloc(&cache, io, handle, sz); |
| |
| int x = 0, y = 0; |
| if (fliphoriz) { |
| bits = Internal_GetScanLine(dib, header.is_height - y - 1, flipvert); |
| } else { |
| bits = Internal_GetScanLine(dib, y, flipvert); |
| } |
| |
| while( y < header.is_height) { |
| |
| rle = cacheIO_getByte(&cache); |
| |
| BOOL has_rle = rle & 0x80; |
| rle &= ~0x80; // remove type-bit |
| |
| BYTE rle_count = rle + 1; |
| |
| if (has_rle) { |
| |
| FILE_BGRA *val = (FILE_BGRA*)cacheIO_getBytes(&cache, sizeof(FILE_BGRA)); |
| |
| for (int ix = 0; ix < rle_count; ix++) { |
| #if FREEIMAGE_COLORORDER == FREEIMAGE_COLORORDER_BGR |
| *(reinterpret_cast<unsigned*>(bits+x)) = *(reinterpret_cast<unsigned*> (val)); |
| #else // NOTE This is faster then doing reinterpret_cast + INPLACESWAP for RGB! |
| bits[x + FI_RGBA_BLUE] = val->b; |
| bits[x + FI_RGBA_GREEN] = val->g; |
| bits[x + FI_RGBA_RED] = val->r; |
| bits[x + FI_RGBA_ALPHA] = val->a; |
| #endif |
| x += 4; |
| |
| if(x >= line) { |
| x = 0; |
| y++; |
| |
| if (fliphoriz) { |
| bits = Internal_GetScanLine(dib, header.is_height - y - 1, flipvert); |
| } else { |
| bits = Internal_GetScanLine(dib, y, flipvert); |
| } |
| } |
| } |
| } else {//<!has_rle |
| |
| for (int ix = 0; ix < rle_count; ix++) { |
| FILE_BGRA *val = (FILE_BGRA*)cacheIO_getBytes(&cache, sizeof(FILE_BGRA)); |
| #if FREEIMAGE_COLORORDER == FREEIMAGE_COLORORDER_BGR |
| *(reinterpret_cast<unsigned*>(bits+x)) = *(reinterpret_cast<unsigned*> (val)); |
| #else |
| bits[x + FI_RGBA_BLUE] = val->b; |
| bits[x + FI_RGBA_GREEN] = val->g; |
| bits[x + FI_RGBA_RED] = val->r; |
| bits[x + FI_RGBA_ALPHA] = val->a; |
| #endif |
| x += 4; |
| |
| if(x >= line){ |
| x = 0; |
| y++; |
| |
| if (fliphoriz) { |
| bits = Internal_GetScanLine(dib, header.is_height - y - 1, flipvert); |
| } else { |
| bits = Internal_GetScanLine(dib, y, flipvert); |
| } |
| } |
| |
| }//< rle_count |
| }//< has_rle |
| }//< while y |
| |
| cacheIO_free(&cache); |
| break; |
| } |
| |
| default : |
| FreeImage_Unload(dib); |
| return NULL; |
| } |
| |
| break; |
| } |
| } |
| |
| return (FIBITMAP *)dib; |
| |
| } catch(const char *message) { |
| FreeImage_OutputMessageProc(s_format_id, message); |
| |
| return NULL; |
| } |
| } |
| |
| return NULL; |
| } |
| |
| static BOOL DLL_CALLCONV |
| Save(FreeImageIO *io, FIBITMAP *dib, fi_handle handle, int page, int flags, void *data) { |
| if ((dib != NULL) && (handle != NULL)) { |
| RGBQUAD *palette = FreeImage_GetPalette(dib); |
| int bpp = FreeImage_GetBPP(dib); |
| |
| // write the file header |
| |
| TGAHEADER header; |
| header.id_length = 0; |
| header.cm_first_entry = 0; |
| header.is_xorigin = 0; |
| header.is_yorigin = 0; |
| header.is_width = (WORD)FreeImage_GetWidth(dib); |
| header.is_height = (WORD)FreeImage_GetHeight(dib); |
| header.is_pixel_depth = (BYTE)bpp; |
| header.is_image_descriptor = 0; |
| |
| if (palette) { |
| header.color_map_type = 1; |
| header.image_type = TGA_CMAP; |
| header.cm_length = (WORD)(1 << bpp); |
| if(FreeImage_IsTransparent(dib)) { |
| header.cm_size = 32; |
| } else { |
| header.cm_size = 24; |
| } |
| } else { |
| header.color_map_type = 0; |
| header.image_type = TGA_RGB; |
| header.cm_length = 0; |
| header.cm_size = 0; |
| } |
| |
| // write the header |
| |
| #ifdef FREEIMAGE_BIGENDIAN |
| SwapHeader(&header); |
| #endif |
| io->write_proc(&header, sizeof(header), 1, handle); |
| #ifdef FREEIMAGE_BIGENDIAN |
| SwapHeader(&header); |
| #endif |
| |
| // write the palette |
| |
| if (palette) { |
| if(FreeImage_IsTransparent(dib)) { |
| FILE_BGRA *bgra_pal = (FILE_BGRA*)malloc(header.cm_length * sizeof(FILE_BGRA)); |
| |
| // get the transparency table |
| BYTE *trns = FreeImage_GetTransparencyTable(dib); |
| |
| for(unsigned i = 0; i < header.cm_length; i++) { |
| bgra_pal[i].b = palette[i].rgbBlue; |
| bgra_pal[i].g = palette[i].rgbGreen; |
| bgra_pal[i].r = palette[i].rgbRed; |
| bgra_pal[i].a = trns[i]; |
| } |
| |
| io->write_proc(bgra_pal, sizeof(FILE_BGRA), header.cm_length, handle); |
| |
| free(bgra_pal); |
| |
| } else { |
| FILE_BGR *bgr_pal = (FILE_BGR*)malloc(header.cm_length * sizeof(FILE_BGR)); |
| |
| for(unsigned i = 0; i < header.cm_length; i++) { |
| bgr_pal[i].b = palette[i].rgbBlue; |
| bgr_pal[i].g = palette[i].rgbGreen; |
| bgr_pal[i].r = palette[i].rgbRed; |
| } |
| |
| io->write_proc(bgr_pal, sizeof(FILE_BGR), header.cm_length, handle); |
| |
| free(bgr_pal); |
| } |
| } |
| |
| // write the data bits |
| |
| for (unsigned y = 0; y < header.is_height; y++) { |
| BYTE *bits = FreeImage_GetScanLine(dib, y); |
| |
| switch(bpp) { |
| case 8: |
| { |
| io->write_proc(bits, header.is_width, 1, handle); |
| break; |
| } |
| case 16: |
| { |
| WORD pixel; |
| for(unsigned x = 0; x < header.is_width; x++) { |
| pixel = *(((WORD *)bits) + x); |
| #ifdef FREEIMAGE_BIGENDIAN |
| SwapShort(&pixel); |
| #endif |
| io->write_proc(&pixel, sizeof(WORD), 1, handle); |
| } |
| break; |
| } |
| case 24: |
| { |
| FILE_BGR bgr; |
| RGBTRIPLE *trip; |
| for(unsigned x = 0; x < header.is_width; x++) { |
| trip = ((RGBTRIPLE *)bits) + x; |
| bgr.b = trip->rgbtBlue; |
| bgr.g = trip->rgbtGreen; |
| bgr.r = trip->rgbtRed; |
| io->write_proc(&bgr, sizeof(FILE_BGR), 1, handle); |
| } |
| break; |
| } |
| case 32: |
| { |
| FILE_BGRA bgra; |
| RGBQUAD *quad; |
| for(unsigned x = 0; x < header.is_width; x++) { |
| quad = ((RGBQUAD *)bits) + x; |
| bgra.b = quad->rgbBlue; |
| bgra.g = quad->rgbGreen; |
| bgra.r = quad->rgbRed; |
| bgra.a = quad->rgbReserved; |
| io->write_proc(&bgra, sizeof(FILE_BGRA), 1, handle); |
| } |
| break; |
| } |
| } |
| } |
| |
| // write the TARGA signature |
| |
| TGAFOOTER footer; |
| footer.developer_offset = 0; |
| footer.extension_offset = 0; |
| strcpy(footer.signature, "TRUEVISION-XFILE."); |
| |
| #ifdef FREEIMAGE_BIGENDIAN |
| SwapFooter(&footer); |
| #endif |
| io->write_proc(&footer, sizeof(footer), 1, handle); |
| |
| return TRUE; |
| } |
| |
| return FALSE; |
| } |
| |
| // ========================================================== |
| // Init |
| // ========================================================== |
| |
| void DLL_CALLCONV |
| InitTARGA(Plugin *plugin, int format_id) { |
| s_format_id = format_id; |
| |
| plugin->format_proc = Format; |
| plugin->description_proc = Description; |
| plugin->extension_proc = Extension; |
| plugin->regexpr_proc = RegExpr; |
| plugin->open_proc = NULL; |
| plugin->close_proc = NULL; |
| plugin->pagecount_proc = NULL; |
| plugin->pagecapability_proc = NULL; |
| plugin->load_proc = Load; |
| plugin->save_proc = Save; |
| plugin->validate_proc = Validate; |
| plugin->mime_proc = MimeType; |
| plugin->supports_export_bpp_proc = SupportsExportDepth; |
| plugin->supports_export_type_proc = SupportsExportType; |
| plugin->supports_icc_profiles_proc = NULL; |
| } |