| FreeImage Documentation -Contents Previous Next Up |
Conversion functions
SubsectionsFreeImage_ConvertToGreyscale
void FreeImage_ConvertToGreyscale(void *dib);
Grays out the given bitmap. FreeImage_ConvertTo8Bits
void *FreeImage_ConvertTo8Bits(void *dib, bool type555 = false);
Converts the given bitmap to 8 bits. If the bitmap is 24 or 32 bit RGB, the color values are converted to grayscale. If the bitmap is 16-bit, the second parameter specifies how the bitmap is treated. If type555 is true, a colour representation of 5-5-5 (5 bits for red, 5 bits for green, 5 bits for blue) is assumed. Otherwise a 5-6-5 (5 bits for red, 6 bits for green, 5 bits for blue) is used. FreeImage_ConvertTo16Bits
void *FreeImage_ConvertTo16Bits(void *dib, bool type555 = false);
Converts the given bitmap to 16 bits. If type555 is true, the bits are ordened in a 5-5-5 style manager, otherwise 5-6-5 is used. FreeImage_ConvertTo24Bits
void *FreeImage_ConvertTo24Bits(void *dib, bool type555 = false);
Converts the given bitmap to 24 bits. If the bitmap is 16-bit, the second parameter specifies how the bitmap is treated. If type555 is true, a colour representation of 5-5-5 (5 bits for red, 5 bits for green, 5 bits for blue) is assumed. Otherwise a 5-6-5 (5 bits for red, 6 bits for green, 5 bits for blue) is used. FreeImage_ConvertTo32Bits
void *FreeImage_ConvertTo32Bits(void *dib, bool type555 = false);
Converts the given bitmap to 32 bits. If the bitmap is 16-bit, the second parameter specifies how the bitmap is treated. If type555 is true, a colour representation of 5-5-5 (5 bits for red, 5 bits for green, 5 bits for blue) is assumed. Otherwise a 5-6-5 (5 bits for red, 6 bits for green, 5 bits for blue) is used. FreeImage_ColorQuantize
void *FreeImage_ColorQuantize(void *dib);
Quantizes a 24-bit bitmap to an 8-bit bitmap using Wu's octree algorithm. Copyright 2000 Floris van den Berg (freeimage@wxs.nl) |