462 lines
10 KiB
C++
462 lines
10 KiB
C++
//========= Copyright Valve Corporation, All rights reserved. ============//
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//
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// Purpose:
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//
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//=============================================================================//
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#include "bitmap/bitmap.h"
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#include "dbg.h"
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// Should be last include
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#include "tier0/memdbgon.h"
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bool Bitmap_t::IsValid() const
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{
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if ( m_nWidth <= 0 || m_nHeight <= 0 || m_pBits == NULL )
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{
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Assert( m_nWidth == 0 );
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Assert( m_nHeight == 0 );
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Assert( m_pBits == NULL );
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return false;
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}
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return true;
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}
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void Bitmap_t::Clear()
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{
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if ( m_pBits && m_bOwnsBuffer )
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{
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free( m_pBits );
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}
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Reset();
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}
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void Bitmap_t::Init( int xs, int ys, ImageFormat imageFormat, int nStride )
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{
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// Check for bogus allocation sizes
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if (xs <= 0 || ys <= 0 )
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{
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Assert( xs == 0 );
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Assert( ys == 0 );
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Clear();
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return;
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}
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int nPixSize = ImageLoader::SizeInBytes( imageFormat );
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// Auto detect stride
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if ( nStride == 0 )
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{
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nStride = nPixSize * xs;
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}
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// Check for NOP
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if (
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m_pBits
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&& m_bOwnsBuffer
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&& m_nWidth == xs
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&& m_nHeight == ys
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&& nStride == m_nStride
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&& nPixSize == m_nPixelSize )
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{
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// We're already got a buffer of the right size.
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// The only thing that might be wrong is the pixel format.
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m_ImageFormat = imageFormat;
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return;
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}
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// Free up anything already allocated
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Clear();
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// Remember dimensions and pixel format
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m_nWidth = xs;
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m_nHeight = ys;
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m_ImageFormat = imageFormat;
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m_nPixelSize = nPixSize;
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m_nStride = nStride;
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// Allocate buffer. Because this is a PC game,
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// failure is impossible....right?
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m_pBits = (byte *)malloc( ys * m_nStride );
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// Assume ownership
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m_bOwnsBuffer = true;
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}
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void Bitmap_t::SetBuffer( int nWidth, int nHeight, ImageFormat imageFormat, unsigned char *pBits, bool bAssumeOwnership, int nStride )
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{
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Assert( pBits );
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Assert( nWidth > 0 );
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Assert( nHeight > 0 );
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// Free up anything already allocated
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Clear();
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// Remember dimensions and pixel format
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m_nWidth = nWidth;
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m_nHeight = nHeight;
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m_ImageFormat = imageFormat;
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m_nPixelSize = ImageLoader::SizeInBytes( imageFormat );
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if ( nStride == 0 )
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{
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m_nStride = m_nPixelSize * nWidth;
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}
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else
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{
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m_nStride = nStride;
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}
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// Set our buffer pointer
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m_pBits = pBits;
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// Assume ownership of the buffer, if requested
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m_bOwnsBuffer = bAssumeOwnership;
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// We should be good to go
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Assert( IsValid() );
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}
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Color Bitmap_t::GetColor( int x, int y ) const
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{
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Assert( x >= 0 && x < m_nWidth );
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Assert( y >= 0 && y < m_nHeight );
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Assert( m_pBits );
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// Get pointer to pixel data
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byte *ptr = m_pBits + (y*m_nStride) + x* m_nPixelSize;
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// Check supported image formats
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switch ( m_ImageFormat )
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{
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case IMAGE_FORMAT_RGBA8888:
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return Color( ptr[0], ptr[1], ptr[2], ptr[3] );
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case IMAGE_FORMAT_ABGR8888:
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return Color( ptr[3], ptr[2], ptr[1], ptr[0] );
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default:
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Assert( !"Unsupport image format!");
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return Color( 255,0,255,255 );
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}
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}
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void Bitmap_t::SetColor( int x, int y, Color c )
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{
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Assert( x >= 0 && x < m_nWidth );
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Assert( y >= 0 && y < m_nHeight );
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Assert( m_pBits );
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// Get pointer to pixel data
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byte *ptr = m_pBits + (y*m_nStride) + x* m_nPixelSize;
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// Check supported image formats
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switch ( m_ImageFormat )
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{
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case IMAGE_FORMAT_RGBA8888:
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ptr[0] = c.r();
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ptr[1] = c.g();
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ptr[2] = c.b();
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ptr[3] = c.a();
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break;
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case IMAGE_FORMAT_ABGR8888:
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ptr[0] = c.a();
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ptr[1] = c.b();
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ptr[2] = c.g();
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ptr[3] = c.r();
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break;
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default:
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Assert( !"Unsupport image format!");
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break;
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}
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}
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//bool LoadVTF( const char *pszFilename )
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//{
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//
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// // Load the raw file data
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// CUtlBuffer fileData;
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// if ( !filesystem->ReadFile( pszFilename, "game", fileData ) )
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// {
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// Warning( "Failed to load %s\n", pszFilename);
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// return false;
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// }
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//
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// return LoadVTFFromBuffer( fileData, pszFilename );
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//}
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//
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//bool LoadVTFFromBuffer( CUtlBuffer fileData, const char *pszDebugName = "buffer" )
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//{
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//
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// // Parse it into VTF object
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// IVTFTexture *pVTFTexture( CreateVTFTexture() );
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// if ( !pVTFTexture->Unserialize( fileData ) )
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// {
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// DestroyVTFTexture( pVTFTexture );
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// Warning( "Failed to deserialize VTF %s\n", pszDebugName);
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// return false;
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// }
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//
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// // We are re-reading our own files, so they should be 8888's
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// if ( pVTFTexture->Format() != IMAGE_FORMAT_RGBA8888 )
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// {
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// DestroyVTFTexture( pVTFTexture );
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// Warning( "%s isn't RGBA8888\n", pszDebugName);
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// return false;
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// }
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//
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// // Copy the image data
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// Allocate( pVTFTexture->Width(), pVTFTexture->Height() );
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// for ( int y = 0 ; y < m_nHeight ; ++y )
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// {
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// memcpy( PixPtr(0, y), pVTFTexture->ImageData(0, 0, 0, 0, y), m_nWidth*4 );
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// }
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//
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// // Clean up
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// DestroyVTFTexture( pVTFTexture );
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// return true;
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//}
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//
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//bool SaveVTF( CUtlBuffer &outBuffer )
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//{
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// // Create the VTF to write into
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// IVTFTexture *pVTFTexture( CreateVTFTexture() );
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// const int nFlags = TEXTUREFLAGS_NOMIP | TEXTUREFLAGS_NOLOD | TEXTUREFLAGS_SRGB;
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// if ( !pVTFTexture->Init( m_nWidth, m_nHeight, 1, IMAGE_FORMAT_RGBA8888, nFlags, 1, 1 ) )
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// {
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// DestroyVTFTexture( pVTFTexture );
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// return false;
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// }
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//
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// // write the rgba image to the vtf texture using the pixel writer
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// CPixelWriter pixelWriter;
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// pixelWriter.SetPixelMemory( pVTFTexture->Format(), pVTFTexture->ImageData(), pVTFTexture->RowSizeInBytes( 0 ) );
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//
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// for (int y = 0; y < m_nHeight; ++y)
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// {
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// pixelWriter.Seek( 0, y );
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// for (int x = 0; x < m_nWidth; ++x)
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// {
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// Color c = GetPix( x, y );
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// pixelWriter.WritePixel( c.r(), c.g(), c.b(), c.a() );
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// }
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// }
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//
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// // Serialize to the buffer
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// if ( !pVTFTexture->Serialize( outBuffer ) )
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// {
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// DestroyVTFTexture( pVTFTexture );
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// return false;
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// }
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// DestroyVTFTexture( pVTFTexture );
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// return true;
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//}
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//void Resize( int nNewSizeX, int nNewSizeY, const Image *pImgSrc = NULL )
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//{
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// if ( pImgSrc == NULL )
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// {
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// pImgSrc = this;
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// }
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//
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// if ( nNewSizeX == m_nWidth && nNewSizeY == m_nHeight && pImgSrc == this )
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// {
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// return;
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// }
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//
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// byte *pNewData = (byte *)malloc( nNewSizeX * nNewSizeY * 4 );
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// ImgUtl_StretchRGBAImage( pImgSrc->m_pBits, pImgSrc->m_nWidth, pImgSrc->m_nHeight, pNewData, nNewSizeX, nNewSizeY );
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// Clear();
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// m_pBits = pNewData;
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// m_nWidth = nNewSizeX;
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// m_nHeight = nNewSizeY;
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//}
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//
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//void Crop( int x0, int y0, int nNewSizeX, int nNewSizeY, const Image *pImgSrc )
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//{
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// if ( pImgSrc == NULL )
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// {
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// pImgSrc = this;
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// }
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//
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// if ( nNewSizeX == m_nWidth && nNewSizeY == m_nHeight && pImgSrc == this )
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// {
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// return;
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// }
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//
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//
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// Assert( x0 >= 0 );
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// Assert( y0 >= 0 );
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// Assert( x0 + nNewSizeX <= pImgSrc->m_nWidth );
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// Assert( y0 + nNewSizeY <= pImgSrc->m_nHeight );
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//
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// // Allocate new buffer
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// int nRowSize = nNewSizeX * 4;
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// byte *pNewData = (byte *)malloc( nNewSizeY * nRowSize );
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//
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// // Copy data, one row at a time
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// for ( int y = 0 ; y < nNewSizeY ; ++y )
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// {
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// memcpy( pNewData + y*nRowSize, pImgSrc->PixPtr(x0, y0+y), nRowSize );
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// }
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//
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// // Replace current buffer with the new one
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// Clear();
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// m_pBits = pNewData;
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// m_nWidth = nNewSizeX;
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// m_nHeight = nNewSizeY;
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//}
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void Bitmap_t::MakeLogicalCopyOf( Bitmap_t &src, bool bTransferBufferOwnership )
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{
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// What does it mean to make a logical copy of an
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// invalid bitmap? I'll tell you what it means: you have a bug.
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Assert( src.IsValid() );
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// Free up anything we already own
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Clear();
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// Copy all of the member variables so we are
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// a logical copy of the source bitmap
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m_nWidth = src.m_nWidth;
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m_nHeight = src.m_nHeight;
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m_nPixelSize = src.m_nPixelSize;
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m_nStride = src.m_nStride;
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m_ImageFormat = src.m_ImageFormat;
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m_pBits = src.m_pBits;
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Assert( !m_bOwnsBuffer );
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// Check for assuming ownership of the buffer
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if ( bTransferBufferOwnership )
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{
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if ( src.m_bOwnsBuffer )
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{
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m_bOwnsBuffer = true;
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src.m_bOwnsBuffer = false;
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}
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else
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{
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// They don't own the buffer? Then who does?
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// Maybe nobody, and it would safe to assume
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// ownership. But more than likely, this is a
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// bug.
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Assert( src.m_bOwnsBuffer );
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// And a leak is better than a double-free.
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// Don't assume ownership of the buffer.
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}
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}
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}
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void Bitmap_t::Crop( int x0, int y0, int nWidth, int nHeight, const Bitmap_t *pImgSource )
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{
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// Check for cropping in place, then save off our data to a temp
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Bitmap_t temp;
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if ( pImgSource == this || !pImgSource )
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{
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temp.MakeLogicalCopyOf( *this, m_bOwnsBuffer );
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pImgSource = &temp;
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}
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// No source image?
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if ( !pImgSource->IsValid() )
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{
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Assert( pImgSource->IsValid() );
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return;
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}
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// Sanity check crop rectangle
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Assert( x0 >= 0 );
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Assert( y0 >= 0 );
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Assert( x0 + nWidth <= pImgSource->Width() );
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Assert( y0 + nHeight <= pImgSource->Height() );
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// Allocate buffer
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Init( nWidth, nHeight, pImgSource->Format() );
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// Something wrong?
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if ( !IsValid() )
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{
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Assert( IsValid() );
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return;
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}
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// Copy the data a row at a time
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int nRowSize = m_nWidth * m_nPixelSize;
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for ( int y = 0 ; y < m_nHeight ; ++y )
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{
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memcpy( GetPixel(0,y), pImgSource->GetPixel( x0, y + y0 ), nRowSize );
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}
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}
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void Bitmap_t::SetPixelData( const Bitmap_t &src, int nSrcX1, int nSrcY1, int nCopySizeX, int nCopySizeY, int nDestX1, int nDestY1 )
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{
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// Safety
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if ( !src.IsValid() )
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{
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Assert( src.IsValid() );
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return;
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}
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if ( !IsValid() )
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{
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Assert( IsValid() );
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return;
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}
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// You need to specify a valid source rectangle, we cannot clip that for you
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if ( nSrcX1 < 0 || nSrcY1 < 0 || nSrcX1 + nCopySizeX > src.Width() || nSrcY1 + nCopySizeY > src.Height() )
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{
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Assert( nSrcX1 >= 0 );
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Assert( nSrcY1 >= 0 );
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Assert( nSrcX1 + nCopySizeX <= src.Width() );
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Assert( nSrcY1 + nCopySizeY <= src.Height() );
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return;
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}
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// But we can clip the rectangle if it extends outside the destination image in a perfectly
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// reasonable way
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if ( nDestX1 < 0 )
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{
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nCopySizeX += nDestX1;
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nDestX1 = 0;
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}
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if ( nDestX1 + nCopySizeX > Width() )
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{
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nCopySizeX = Width() - nDestX1;
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}
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if ( nDestY1 < 0 )
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{
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nCopySizeY += nDestY1;
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nDestY1 = 0;
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}
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if ( nDestY1 + nCopySizeY > Height() )
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{
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nCopySizeY = Height() - nDestY1;
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}
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if ( nCopySizeX <= 0 || nCopySizeY <= 0 )
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{
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return;
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}
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// Copy the pixel data
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for ( int y = 0 ; y < nCopySizeY ; ++y )
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{
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// Wow, this could be a lot faster in the common case
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// that the pixe formats are the same. But...this code
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// is simple and works, and is NOT the root of all evil.
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for ( int x = 0 ; x < nCopySizeX ; ++x )
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{
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Color c = src.GetColor( nSrcX1 + x, nSrcY1 + y );
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SetColor( nDestX1 + x, nDestY1 + y, c );
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}
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}
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}
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void Bitmap_t::SetPixelData( const Bitmap_t &src, int nDestX1, int nDestY1 )
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{
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SetPixelData( src, 0, 0, src.Width(), src.Height(), nDestX1, nDestY1 );
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}
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