1 files changed, 353 insertions, 0 deletions
diff --git a/bitmap/tgawriter.cpp b/bitmap/tgawriter.cpp
new file mode 100644
index 0000000..a73c996
--- /dev/null
+++ b/bitmap/tgawriter.cpp
@@ -0,0 +1,353 @@
+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+//===========================================================================//
+
+#include <stdlib.h>
+#include <stdio.h>
+#include "tier0/dbg.h"
+#include <malloc.h>
+#include "filesystem.h"
+#include "bitmap/tgawriter.h"
+#include "tier1/utlbuffer.h"
+#include "bitmap/imageformat.h"
+#include "tier2/tier2.h"
+#include "tier2/fileutils.h"
+
+// memdbgon must be the last include file in a .cpp file!!!
+#include "tier0/memdbgon.h"
+
+namespace TGAWriter
+{
+
+#pragma pack(1)
+struct TGAHeader_t
+{
+	unsigned char 	id_length;
+	unsigned char   colormap_type;
+	unsigned char   image_type;
+	unsigned short	colormap_index;
+	unsigned short  colormap_length;
+	unsigned char	colormap_size;
+	unsigned short	x_origin;
+	unsigned short	y_origin;
+	unsigned short	width;
+	unsigned short	height;
+	unsigned char	pixel_size;
+	unsigned char	attributes;
+};
+#pragma pack()
+
+#define fputc myfputc
+#define fwrite myfwrite
+
+static void fputLittleShort( unsigned short s, CUtlBuffer &buffer )
+{
+	buffer.PutChar( s & 0xff );
+	buffer.PutChar( s >> 8 );
+}
+
+static inline void myfputc( unsigned char c, FileHandle_t fileHandle )
+{
+	g_pFullFileSystem->Write( &c, 1, fileHandle );
+}
+
+static inline void myfwrite( void const *data, int size1, int size2, FileHandle_t fileHandle )
+{
+	g_pFullFileSystem->Write( data, size1 * size2, fileHandle );
+}
+
+
+//-----------------------------------------------------------------------------
+// FIXME: assumes that we don't need to do gamma correction.
+//-----------------------------------------------------------------------------
+bool WriteToBuffer( unsigned char *pImageData, CUtlBuffer &buffer, int width, int height, 
+					ImageFormat srcFormat, ImageFormat dstFormat )
+{
+	TGAHeader_t header;
+
+	// Fix the dstFormat to match what actually is going to go into the file
+	switch( dstFormat )
+	{
+	case IMAGE_FORMAT_RGB888:
+		dstFormat = IMAGE_FORMAT_BGR888;
+		break;
+#if defined( _X360 )
+	case IMAGE_FORMAT_LINEAR_RGB888:
+		dstFormat = IMAGE_FORMAT_LINEAR_BGR888;
+		break;
+#endif
+	case IMAGE_FORMAT_RGBA8888:
+		dstFormat = IMAGE_FORMAT_BGRA8888;
+		break;
+	}
+
+	header.id_length = 0; // comment length
+	header.colormap_type = 0; // ???
+
+	switch( dstFormat )
+	{
+	case IMAGE_FORMAT_BGR888:
+#if defined( _X360 )
+	case IMAGE_FORMAT_LINEAR_BGR888:
+#endif
+		header.image_type = 2; // 24/32 bit uncompressed TGA
+		header.pixel_size = 24;
+		break;
+	case IMAGE_FORMAT_BGRA8888:
+		header.image_type = 2; // 24/32 bit uncompressed TGA
+		header.pixel_size = 32;
+		break;
+	case IMAGE_FORMAT_I8:
+		header.image_type = 1; // 8 bit uncompressed TGA
+		header.pixel_size = 8;
+		break;
+	default:
+		return false;
+		break;
+	}
+
+	header.colormap_index = 0;
+	header.colormap_length = 0;
+	header.colormap_size = 0;
+	header.x_origin = 0;
+	header.y_origin = 0;
+	header.width = ( unsigned short )width;
+	header.height = ( unsigned short )height;
+	header.attributes = 0x20;	// Makes it so we don't have to vertically flip the image
+
+	buffer.PutChar( header.id_length );
+	buffer.PutChar( header.colormap_type );
+	buffer.PutChar( header.image_type );
+	fputLittleShort( header.colormap_index, buffer );
+	fputLittleShort( header.colormap_length, buffer );
+	buffer.PutChar( header.colormap_size );
+	fputLittleShort( header.x_origin, buffer );
+	fputLittleShort( header.y_origin, buffer );
+	fputLittleShort( header.width, buffer );
+	fputLittleShort( header.height, buffer );
+	buffer.PutChar( header.pixel_size );
+	buffer.PutChar( header.attributes );
+
+	int nSizeInBytes = width * height * ImageLoader::SizeInBytes( dstFormat );
+	buffer.EnsureCapacity( buffer.TellPut() + nSizeInBytes );
+	unsigned char *pDst = (unsigned char*)buffer.PeekPut();
+
+	if ( !ImageLoader::ConvertImageFormat( pImageData, srcFormat, pDst, dstFormat, width, height ) )
+		return false;
+
+	buffer.SeekPut( CUtlBuffer::SEEK_CURRENT, nSizeInBytes );
+	return true;
+}
+
+bool WriteDummyFileNoAlloc( const char *fileName, int width, int height, enum ImageFormat dstFormat )
+{
+	TGAHeader_t tgaHeader;
+
+	Assert( g_pFullFileSystem );
+	if( !g_pFullFileSystem )
+	{
+		return false;
+	}
+	COutputFile fp( fileName );
+
+	int nBytesPerPixel, nImageType, nPixelSize;
+
+	switch( dstFormat )
+	{
+	case IMAGE_FORMAT_BGR888:
+#if defined( _X360 )
+	case IMAGE_FORMAT_LINEAR_BGR888:
+#endif
+		nBytesPerPixel = 3; // 24/32 bit uncompressed TGA
+		nPixelSize = 24;
+		nImageType = 2;
+		break;
+	case IMAGE_FORMAT_BGRA8888:
+		nBytesPerPixel = 4; // 24/32 bit uncompressed TGA
+		nPixelSize = 32;
+		nImageType = 2;
+		break;
+	case IMAGE_FORMAT_I8:
+		nBytesPerPixel = 1; // 8 bit uncompressed TGA
+		nPixelSize = 8;
+		nImageType = 1;
+		break;
+	default:
+		return false;
+		break;
+	}
+
+    memset( &tgaHeader, 0, sizeof(tgaHeader) );
+    tgaHeader.id_length  = 0;
+    tgaHeader.image_type = (unsigned char) nImageType;
+    tgaHeader.width      = (unsigned short) width;
+    tgaHeader.height     = (unsigned short) height;
+    tgaHeader.pixel_size = (unsigned char) nPixelSize;
+    tgaHeader.attributes = 0x20;
+
+    // Write the Targa header
+	fp.Write( &tgaHeader, sizeof(TGAHeader_t) );
+
+	// Write out width * height black pixels
+	unsigned char black[4] = { 0x1E, 0x9A, 0xFF, 0x00 };
+	for (int i = 0; i < width * height; i++)
+	{
+		fp.Write( black, nBytesPerPixel );
+	}
+
+	return true;
+}
+
+bool WriteTGAFile( const char *fileName, int width, int height, enum ImageFormat srcFormat, uint8 const *srcData, int nStride )
+{
+	TGAHeader_t tgaHeader;
+
+	COutputFile fp( fileName );
+
+	int nBytesPerPixel, nImageType, nPixelSize;
+
+	bool bMustConvert = false;
+	ImageFormat dstFormat = srcFormat;
+ 
+	switch( srcFormat )
+	{
+	case IMAGE_FORMAT_BGR888:
+#if defined( _X360 )
+	case IMAGE_FORMAT_LINEAR_BGR888:
+#endif
+		nBytesPerPixel = 3; // 24/32 bit uncompressed TGA
+		nPixelSize = 24;
+		nImageType = 2;
+		break;
+	case IMAGE_FORMAT_BGRA8888:
+		nBytesPerPixel = 4; // 24/32 bit uncompressed TGA
+		nPixelSize = 32;
+		nImageType = 2;
+		break;
+	case IMAGE_FORMAT_RGBA8888:
+		bMustConvert = true;
+		dstFormat = IMAGE_FORMAT_BGRA8888;
+		nBytesPerPixel = 4; // 24/32 bit uncompressed TGA
+		nPixelSize = 32;
+		nImageType = 2;
+		break;
+	case IMAGE_FORMAT_I8:
+		nBytesPerPixel = 1; // 8 bit uncompressed TGA
+		nPixelSize = 8;
+		nImageType = 1;
+		break;
+	default:
+		return false;
+		break;
+	}
+
+    memset( &tgaHeader, 0, sizeof(tgaHeader) );
+    tgaHeader.id_length  = 0;
+    tgaHeader.image_type = (unsigned char) nImageType;
+    tgaHeader.width      = (unsigned short) width;
+    tgaHeader.height     = (unsigned short) height;
+    tgaHeader.pixel_size = (unsigned char) nPixelSize;
+    tgaHeader.attributes = 0x20;
+
+    // Write the Targa header
+	fp.Write( &tgaHeader, sizeof(TGAHeader_t) );
+
+	// Write out image data
+	if ( bMustConvert )
+	{
+		uint8 *pLineBuf = new uint8[ nBytesPerPixel * width ];
+		while( height-- )
+		{
+			ImageLoader::ConvertImageFormat( srcData, srcFormat, pLineBuf, dstFormat, width, 1 );
+			fp.Write( pLineBuf, nBytesPerPixel * width );
+			srcData += nStride;
+		}
+		delete[] pLineBuf;
+	}
+	else
+	{
+		while( height-- )
+		{
+			fp.Write( srcData, nBytesPerPixel * width );
+			srcData += nStride;
+		}
+		
+	}
+	return true;
+}
+
+
+bool WriteRectNoAlloc( unsigned char *pImageData, const char *fileName, int nXOrigin, int nYOrigin, int width, int height, int nStride, enum ImageFormat srcFormat )
+{
+	Assert( g_pFullFileSystem );
+	if( !g_pFullFileSystem )
+	{
+		return false;
+	}
+	FileHandle_t fp;
+	fp = g_pFullFileSystem->Open( fileName, "r+b" );
+
+	//
+	// Read in the targa header
+	//
+	TGAHeader_t tgaHeader;
+	g_pFullFileSystem->Read( &tgaHeader, sizeof(tgaHeader), fp );
+
+
+	int nBytesPerPixel, nPixelSize;
+
+	switch( srcFormat )
+	{
+	case IMAGE_FORMAT_BGR888:
+#if defined( _X360 )
+	case IMAGE_FORMAT_LINEAR_BGR888:
+#endif
+		nBytesPerPixel = 3; // 24/32 bit uncompressed TGA
+		nPixelSize = 24;
+		break;
+	case IMAGE_FORMAT_BGRA8888:
+		nBytesPerPixel = 4; // 24/32 bit uncompressed TGA
+		nPixelSize = 32;
+		break;
+	case IMAGE_FORMAT_I8:
+		nBytesPerPixel = 1; // 8 bit uncompressed TGA
+		nPixelSize = 8;
+		break;
+	default:
+		return false;
+		break;
+	}
+
+	// Verify src data matches the targa we're going to write into
+	if ( nPixelSize != tgaHeader.pixel_size )
+	{
+		Warning( "TGA doesn't match source data.\n" );
+		return false;
+	}
+
+
+	// Seek to the origin of the target subrect from the beginning of the file
+	g_pFullFileSystem->Seek( fp, nBytesPerPixel * (tgaHeader.width * nYOrigin + nXOrigin), FILESYSTEM_SEEK_CURRENT );
+
+	unsigned char *pSrc = pImageData;
+
+	// Run through each scanline of the incoming rect
+	for (int row=0; row < height; row++ )
+	{
+		g_pFullFileSystem->Write( pSrc, nBytesPerPixel * width, fp );
+
+		// Advance src pointer to next scanline
+		pSrc += nBytesPerPixel * nStride;
+
+		// Seek ahead in the file
+		g_pFullFileSystem->Seek( fp, nBytesPerPixel * ( tgaHeader.width - width ), FILESYSTEM_SEEK_CURRENT );
+	}
+
+	g_pFullFileSystem->Close( fp );
+	return true;
+}
+
+} // end namespace TGAWriter
+