+++ /dev/null
-/*
-Copyright (C) 2001-2006, William Joseph.
-All Rights Reserved.
-
-This file is part of GtkRadiant.
-
-GtkRadiant is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2 of the License, or
-(at your option) any later version.
-
-GtkRadiant 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 General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with GtkRadiant; if not, write to the Free Software
-Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-*/
-
-#include "tga.h"
-
-#include "ifilesystem.h"
-#include "iarchive.h"
-#include "idatastream.h"
-
-typedef unsigned char byte;
-
-#include <stdlib.h>
-
-#include "generic/bitfield.h"
-#include "imagelib.h"
-#include "bytestreamutils.h"
-
-// represents x,y origin of tga image being decoded
-class Flip00 {}; // no flip
-class Flip01 {}; // vertical flip only
-class Flip10 {}; // horizontal flip only
-class Flip11 {}; // both
-
-template<typename PixelDecoder>
-void image_decode(PointerInputStream& istream, PixelDecoder& decode, RGBAImage& image, const Flip00&)
-{
- RGBAPixel* end = image.pixels + (image.height * image.width);
- for(RGBAPixel* row = end; row != image.pixels; row -= image.width)
- {
- for(RGBAPixel* pixel = row - image.width; pixel != row; ++pixel)
- {
- decode(istream, *pixel);
- }
- }
-}
-
-template<typename PixelDecoder>
-void image_decode(PointerInputStream& istream, PixelDecoder& decode, RGBAImage& image, const Flip01&)
-{
- RGBAPixel* end = image.pixels + (image.height * image.width);
- for(RGBAPixel* row = image.pixels; row != end; row += image.width)
- {
- for(RGBAPixel* pixel = row; pixel != row + image.width; ++pixel)
- {
- decode(istream, *pixel);
- }
- }
-}
-
-template<typename PixelDecoder>
-void image_decode(PointerInputStream& istream, PixelDecoder& decode, RGBAImage& image, const Flip10&)
-{
- RGBAPixel* end = image.pixels + (image.height * image.width);
- for(RGBAPixel* row = end; row != image.pixels; row -= image.width)
- {
- for(RGBAPixel* pixel = row; pixel != row - image.width;)
- {
- decode(istream, *--pixel);
- }
- }
-}
-
-template<typename PixelDecoder>
-void image_decode(PointerInputStream& istream, PixelDecoder& decode, RGBAImage& image, const Flip11&)
-{
- RGBAPixel* end = image.pixels + (image.height * image.width);
- for(RGBAPixel* row = image.pixels; row != end; row += image.width)
- {
- for(RGBAPixel* pixel = row + image.width; pixel != row;)
- {
- decode(istream, *--pixel);
- }
- }
-}
-
-inline void istream_read_gray(PointerInputStream& istream, RGBAPixel& pixel)
-{
- istream.read(&pixel.blue, 1);
- pixel.red = pixel.green = pixel.blue;
- pixel.alpha = 0xff;
-}
-
-inline void istream_read_rgb(PointerInputStream& istream, RGBAPixel& pixel)
-{
- istream.read(&pixel.blue, 1);
- istream.read(&pixel.green, 1);
- istream.read(&pixel.red, 1);
- pixel.alpha = 0xff;
-}
-
-inline void istream_read_rgba(PointerInputStream& istream, RGBAPixel& pixel)
-{
- istream.read(&pixel.blue, 1);
- istream.read(&pixel.green, 1);
- istream.read(&pixel.red, 1);
- istream.read(&pixel.alpha, 1);
-}
-
-class TargaDecodeGrayPixel
-{
-public:
- void operator()(PointerInputStream& istream, RGBAPixel& pixel)
- {
- istream_read_gray(istream, pixel);
- }
-};
-
-template<typename Flip>
-void targa_decode_grayscale(PointerInputStream& istream, RGBAImage& image, const Flip& flip)
-{
- TargaDecodeGrayPixel decode;
- image_decode(istream, decode, image, flip);
-}
-
-class TargaDecodeRGBPixel
-{
-public:
- void operator()(PointerInputStream& istream, RGBAPixel& pixel)
- {
- istream_read_rgb(istream, pixel);
- }
-};
-
-template<typename Flip>
-void targa_decode_rgb(PointerInputStream& istream, RGBAImage& image, const Flip& flip)
-{
- TargaDecodeRGBPixel decode;
- image_decode(istream, decode, image, flip);
-}
-
-class TargaDecodeRGBAPixel
-{
-public:
- void operator()(PointerInputStream& istream, RGBAPixel& pixel)
- {
- istream_read_rgba(istream, pixel);
- }
-};
-
-template<typename Flip>
-void targa_decode_rgba(PointerInputStream& istream, RGBAImage& image, const Flip& flip)
-{
- TargaDecodeRGBAPixel decode;
- image_decode(istream, decode, image, flip);
-}
-
-typedef byte TargaPacket;
-typedef byte TargaPacketSize;
-
-inline void targa_packet_read_istream(TargaPacket& packet, PointerInputStream& istream)
-{
- istream.read(&packet, 1);
-}
-
-inline bool targa_packet_is_rle(const TargaPacket& packet)
-{
- return (packet & 0x80) != 0;
-}
-
-inline TargaPacketSize targa_packet_size(const TargaPacket& packet)
-{
- return 1 + (packet & 0x7f);
-}
-
-
-class TargaDecodeRGBPixelRLE
-{
- TargaPacketSize m_packetSize;
- RGBAPixel m_pixel;
- TargaPacket m_packet;
-public:
- TargaDecodeRGBPixelRLE() : m_packetSize(0)
- {
- }
- void operator()(PointerInputStream& istream, RGBAPixel& pixel)
- {
- if(m_packetSize == 0)
- {
- targa_packet_read_istream(m_packet, istream);
- m_packetSize = targa_packet_size(m_packet);
-
- if(targa_packet_is_rle(m_packet))
- {
- istream_read_rgb(istream, m_pixel);
- }
- }
-
- if(targa_packet_is_rle(m_packet))
- {
- pixel = m_pixel;
- }
- else
- {
- istream_read_rgb(istream, pixel);
- }
-
- --m_packetSize;
- }
-};
-
-template<typename Flip>
-void targa_decode_rle_rgb(PointerInputStream& istream, RGBAImage& image, const Flip& flip)
-{
- TargaDecodeRGBPixelRLE decode;
- image_decode(istream, decode, image, flip);
-}
-
-class TargaDecodeRGBAPixelRLE
-{
- TargaPacketSize m_packetSize;
- RGBAPixel m_pixel;
- TargaPacket m_packet;
-public:
- TargaDecodeRGBAPixelRLE() : m_packetSize(0)
- {
- }
- void operator()(PointerInputStream& istream, RGBAPixel& pixel)
- {
- if(m_packetSize == 0)
- {
- targa_packet_read_istream(m_packet, istream);
- m_packetSize = targa_packet_size(m_packet);
-
- if(targa_packet_is_rle(m_packet))
- {
- istream_read_rgba(istream, m_pixel);
- }
- }
-
- if(targa_packet_is_rle(m_packet))
- {
- pixel = m_pixel;
- }
- else
- {
- istream_read_rgba(istream, pixel);
- }
-
- --m_packetSize;
- }
-};
-
-template<typename Flip>
-void targa_decode_rle_rgba(PointerInputStream& istream, RGBAImage& image, const Flip& flip)
-{
- TargaDecodeRGBAPixelRLE decode;
- image_decode(istream, decode, image, flip);
-}
-
-struct TargaHeader
-{
- unsigned char id_length, colormap_type, image_type;
- unsigned short colormap_index, colormap_length;
- unsigned char colormap_size;
- unsigned short x_origin, y_origin, width, height;
- unsigned char pixel_size, attributes;
-};
-
-inline void targa_header_read_istream(TargaHeader& targa_header, PointerInputStream& istream)
-{
- targa_header.id_length = istream_read_byte(istream);
- targa_header.colormap_type = istream_read_byte(istream);
- targa_header.image_type = istream_read_byte(istream);
-
- targa_header.colormap_index = istream_read_int16_le(istream);
- targa_header.colormap_length = istream_read_int16_le(istream);
- targa_header.colormap_size = istream_read_byte(istream);
- targa_header.x_origin = istream_read_int16_le(istream);
- targa_header.y_origin = istream_read_int16_le(istream);
- targa_header.width = istream_read_int16_le(istream);
- targa_header.height = istream_read_int16_le(istream);
- targa_header.pixel_size = istream_read_byte(istream);
- targa_header.attributes = istream_read_byte(istream);
-
- if (targa_header.id_length != 0)
- istream.seek(targa_header.id_length); // skip TARGA image comment
-}
-
-template<typename Type>
-class ScopeDelete
-{
- Type* m_value;
- ScopeDelete(const ScopeDelete&);
- ScopeDelete& operator=(const ScopeDelete&);
-public:
- ScopeDelete(Type* value) : m_value(value)
- {
- }
- ~ScopeDelete()
- {
- delete m_value;
- }
- Type* get_pointer() const
- {
- return m_value;
- }
-};
-
-template<typename Flip>
-Image* Targa_decodeImageData(const TargaHeader& targa_header, PointerInputStream& istream, const Flip& flip)
-{
- RGBAImage* image = new RGBAImage(targa_header.width, targa_header.height);
-
- if (targa_header.image_type == 2 || targa_header.image_type == 3)
- {
- switch (targa_header.pixel_size)
- {
- case 8:
- targa_decode_grayscale(istream, *image, flip);
- break;
- case 24:
- targa_decode_rgb(istream, *image, flip);
- break;
- case 32:
- targa_decode_rgba(istream, *image, flip);
- break;
- default:
- globalErrorStream() << "LoadTGA: illegal pixel_size '" << targa_header.pixel_size << "'\n";
- image->release();
- return 0;
- }
- }
- else if (targa_header.image_type == 10)
- {
- switch (targa_header.pixel_size)
- {
- case 24:
- targa_decode_rle_rgb(istream, *image, flip);
- break;
- case 32:
- targa_decode_rle_rgba(istream, *image, flip);
- break;
- default:
- globalErrorStream() << "LoadTGA: illegal pixel_size '" << targa_header.pixel_size << "'\n";
- image->release();
- return 0;
- }
- }
-
- return image;
-}
-
-const unsigned int TGA_FLIP_HORIZONTAL = 0x10;
-const unsigned int TGA_FLIP_VERTICAL = 0x20;
-
-Image* LoadTGABuff(const byte* buffer)
-{
- PointerInputStream istream(buffer);
- TargaHeader targa_header;
-
- targa_header_read_istream(targa_header, istream);
-
- if (targa_header.image_type != 2 && targa_header.image_type != 10 && targa_header.image_type != 3)
- {
- globalErrorStream() << "LoadTGA: TGA type " << targa_header.image_type << " not supported\n";
- globalErrorStream() << "LoadTGA: Only type 2 (RGB), 3 (gray), and 10 (RGB) TGA images supported\n";
- return 0;
- }
-
- if (targa_header.colormap_type != 0)
- {
- globalErrorStream() << "LoadTGA: colormaps not supported\n";
- return 0;
- }
-
- if ((targa_header.pixel_size != 32 && targa_header.pixel_size != 24)
- && targa_header.image_type != 3)
- {
- globalErrorStream() << "LoadTGA: Only 32 or 24 bit images supported\n";
- return 0;
- }
-
- if(!bitfield_enabled(targa_header.attributes, TGA_FLIP_HORIZONTAL)
- && !bitfield_enabled(targa_header.attributes, TGA_FLIP_VERTICAL))
- {
- return Targa_decodeImageData(targa_header, istream, Flip00());
- }
- if(!bitfield_enabled(targa_header.attributes, TGA_FLIP_HORIZONTAL)
- && bitfield_enabled(targa_header.attributes, TGA_FLIP_VERTICAL))
- {
- return Targa_decodeImageData(targa_header, istream, Flip01());
- }
- if(bitfield_enabled(targa_header.attributes, TGA_FLIP_HORIZONTAL)
- && !bitfield_enabled(targa_header.attributes, TGA_FLIP_VERTICAL))
- {
- return Targa_decodeImageData(targa_header, istream, Flip10());
- }
- if(bitfield_enabled(targa_header.attributes, TGA_FLIP_HORIZONTAL)
- && bitfield_enabled(targa_header.attributes, TGA_FLIP_VERTICAL))
- {
- return Targa_decodeImageData(targa_header, istream, Flip11());
- }
-
- // unreachable
- return 0;
-}
-
-Image* LoadTGA(ArchiveFile& file)
-{
- ScopedArchiveBuffer buffer(file);
- return LoadTGABuff(buffer.buffer);
-}
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