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Rev 369 Rev 373
Line 320... Line 320...
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	unsigned char *img = image;
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	unsigned char *img = image;
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	int i, j;
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	int i, j;
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	for( i = width * height; i > 0; --i )
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	for( i = width * height; i > 0; --i )
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	{
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	{
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		/* float scale = powf( 2.0f, img[3] - 128.0f ) / 255.0f; */
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		/* float scale = powf( 2.0f, img[3] - 128.0f ) / 255.0f; */
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		float scale = ldexp( 1.0f / 255.0f, (int)(img[3]) - 128 );
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		float scale = (float)ldexp( 1.0f / 255.0f, (int)(img[3]) - 128 );
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		for( j = 0; j < 3; ++j )
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		for( j = 0; j < 3; ++j )
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		{
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		{
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			if( img[j] * scale > max_val )
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			if( img[j] * scale > max_val )
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			{
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			{
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				max_val = img[j] * scale;
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				max_val = img[j] * scale;
Line 361... Line 361...
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	for( i = width * height; i > 0; --i )
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	for( i = width * height; i > 0; --i )
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	{
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	{
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		/* decode this pixel, and find the max */
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		/* decode this pixel, and find the max */
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		float r,g,b,e, m;
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		float r,g,b,e, m;
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		/* e = scale * powf( 2.0f, img[3] - 128.0f ) / 255.0f; */
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		/* e = scale * powf( 2.0f, img[3] - 128.0f ) / 255.0f; */
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		e = scale * ldexp( 1.0f / 255.0f, (int)(img[3]) - 128 );
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		e = scale * (float)ldexp( 1.0f / 255.0f, (int)(img[3]) - 128 );
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		r = e * img[0];
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		r = e * img[0];
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		g = e * img[1];
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		g = e * img[1];
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		b = e * img[2];
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		b = e * img[2];
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		m = (r > g) ? r : g;
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		m = (r > g) ? r : g;
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		m = (b > m) ? b : m;
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		m = (b > m) ? b : m;
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		/* and encode it into RGBdivA */
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		/* and encode it into RGBdivA */
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		iv = (m != 0.0f) ? (int)(255.0f / m) : 1.0f;
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		iv = (m != 0.0f) ? (int)(255.0f / m) : 1;
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		iv = (iv < 1) ? 1 : iv;
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		iv = (iv < 1) ? 1 : iv;
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		img[3] = (iv > 255) ? 255 : iv;
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		img[3] = (iv > 255) ? 255 : iv;
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		iv = (int)(img[3] * r + 0.5f);
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		iv = (int)(img[3] * r + 0.5f);
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		img[0] = (iv > 255) ? 255 : iv;
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		img[0] = (iv > 255) ? 255 : iv;
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		iv = (int)(img[3] * g + 0.5f);
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		iv = (int)(img[3] * g + 0.5f);
Line 410... Line 410...
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	for( i = width * height; i > 0; --i )
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	for( i = width * height; i > 0; --i )
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	{
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	{
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		/* decode this pixel, and find the max */
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		/* decode this pixel, and find the max */
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		float r,g,b,e, m;
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		float r,g,b,e, m;
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		/* e = scale * powf( 2.0f, img[3] - 128.0f ) / 255.0f; */
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		/* e = scale * powf( 2.0f, img[3] - 128.0f ) / 255.0f; */
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		e = scale * ldexp( 1.0f / 255.0f, (int)(img[3]) - 128 );
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		e = scale * (float)ldexp( 1.0f / 255.0f, (int)(img[3]) - 128 );
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		r = e * img[0];
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		r = e * img[0];
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		g = e * img[1];
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		g = e * img[1];
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		b = e * img[2];
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		b = e * img[2];
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		m = (r > g) ? r : g;
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		m = (r > g) ? r : g;
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		m = (b > m) ? b : m;
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		m = (b > m) ? b : m;
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		/* and encode it into RGBdivA */
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		/* and encode it into RGBdivA */
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		iv = (m != 0.0f) ? (int)sqrtf( 255.0f * 255.0f / m ) : 1.0f;
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		iv = (m != 0.0f) ? (int)sqrtf( 255.0f * 255.0f / m ) : 1;
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		iv = (iv < 1) ? 1 : iv;
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		iv = (iv < 1) ? 1 : iv;
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		img[3] = (iv > 255) ? 255 : iv;
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		img[3] = (iv > 255) ? 255 : iv;
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		iv = (int)(img[3] * img[3] * r / 255.0f + 0.5f);
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		iv = (int)(img[3] * img[3] * r / 255.0f + 0.5f);
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		img[0] = (iv > 255) ? 255 : iv;
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		img[0] = (iv > 255) ? 255 : iv;
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		iv = (int)(img[3] * img[3] * g / 255.0f + 0.5f);
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		iv = (int)(img[3] * img[3] * g / 255.0f + 0.5f);