// ClearRGBA()
// Clear the buffer to the given color. The inputs default to 0
// (black, solid alpha, closest palette match).
// Mode Effect
// RGB all pixels become r,g,b
// RGBA all pixels become r,g,b; Alpha becomes a
// GREY all pixels become the value of r,g,b
// INDEXED all pixels become the closest palette match to r,g,b
void ImageClass::ClearRGBA( IMG_BYTE r, IMG_BYTE g, IMG_BYTE b, IMG_BYTE a ) {
unsigned long i;
unsigned long num_bytes = (width * height * pixel_size);
switch( type ) {
case IMAGE_INDEXED:
ClearIndexed( FindPaletteIndex( r, g, b ) );
break;
case IMAGE_RGB:
ClearRGB( r, g, b );
break;
case IMAGE_RGBA:
IMG_BYTE * pixel;
for( i=0; i < num_bytes; i += pixel_size ) {
pixel = &(image[i]);
pixel[0] = r;
pixel[1] = g;
pixel[2] = b;
pixel[3] = a;
}
break;
case IMAGE_GREY:
ClearGrey( GetValueOfRGB( r, g, b ) );
break;
}
}
// Clear()
// Clear the buffer to the given color. The inputs default to 0
// (black, solid alpha, closest palette match).
// Mode Effect
// RGB all pixels become r,g,b
// RGBA all pixels become r,g,b; Alpha becomes a
// GREY all pixels become the value of r,g,b
// INDEXED all pixels become the closest palette match to r,g,b
void ImageClass::Clear( IMG_BYTE r, IMG_BYTE g, IMG_BYTE b, IMG_BYTE a ) {
switch( type ) {
case IMAGE_INDEXED:
ClearIndexed( FindPaletteIndex( r, g, b ) );
break;
case IMAGE_RGB:
ClearRGB( r, g, b );
break;
case IMAGE_RGBA:
ClearRGBA( r, g, b, a );
break;
case IMAGE_GREY:
ClearGrey( ImageClass::GetValueOfRGB( r, g, b ) );
break;
}
}
// ClearGrey()
// Clears the alpha to the given value. Defaults to 0
// (black, or the closest palette index)
// Mode Effect
// RGB clears buffer to value
// RGBA clears buffer to value; Alpha is untouched
// GREY clears buffer to value
// INDEXED clears buffer to closest match to value
void ImageClass::ClearGrey( IMG_BYTE value ) {
unsigned long i;
unsigned long num_bytes = (width * height * pixel_size);
switch( type ) {
case IMAGE_INDEXED:
ClearIndexed( FindPaletteIndex( value, value, value ) );
break;
case IMAGE_RGB:
case IMAGE_RGBA:
ClearRGB( value, value, value );
break;
case IMAGE_GREY:
for( i=0; i < num_bytes; i += pixel_size )
image[i] = value;
break;
}
}
static BOOL CheckPaletteEntry(LOGPALETTE *pal, int index, BYTE r, BYTE g, BYTE b)
{
PALETTEENTRY *entry;
BOOL moved = 0;
entry = &pal->palPalEntry[index];
if ( entry->peRed != r || entry->peGreen != g || entry->peBlue != b ) {
int found = FindPaletteIndex(pal, r, g, b);
if ( found >= 0 ) {
pal->palPalEntry[found] = *entry;
}
entry->peRed = r;
entry->peGreen = g;
entry->peBlue = b;
moved = 1;
}
entry->peFlags = 0;
return moved;
}
