SDLmm::PixelFormat(3)     OpenBSD Programmer's Manual    SDLmm::PixelFormat(3)



NAME
       SDLmm::PixelFormat -

SYNOPSIS
       #include <sdlmm_pixelformat.h>

   Public Methods
       PixelFormat (SDL_PixelFormat *pixelformat)
           Constructor from an SDL_PixelFormat*.
       virtual ~PixelFormat ()
           The destructor.
       Uint8 BitsPerPixel () const
       Uint8 BytesPerPixel () const
       Uint8 Rshift () const
       Uint8 Gshift () const
       Uint8 Bshift () const
       Uint8 Rloss () const
       Uint8 Gloss () const
       Uint8 Bloss () const
       Uint8 Aloss () const
       Uint32 Rmask () const
       Uint32 Gmask () const
       Uint32 Bmask () const
       Uint32 Amask () const
       Color colorkey () const
       Uint8 alpha () const
       SDL_Palette* palette () const
       Color MapRGB (Uint8 r, Uint8 g, Uint8 b) const
           Map a RGB color value to a pixel format.
       Color MapRGB (const ColorRGB &colorrgb) const
       Color MapRGBA (Uint8 r, Uint8 g, Uint8 b, Uint8 a) const
           Map a RGBA color value to a pixel format.
       Color MapRGBA (const ColorRGBA &colorrgba) const
       void GetRGB (Color pixel, Uint8 &r, Uint8 &g, Uint8 &b) const
           Get RGB values from a pixel in the pixel format of this
           PixelFormat.
       const ColorRGB GetRGB (Color pixel) const
       void GetRGBA (Color pixel, Uint8 &r, Uint8 &g, Uint8 &b, Uint8 &a)
           const
           Get RGBA values from a pixel in the pixel format of this
           PixelFormat.
       const ColorRGBA GetRGBA (Color pixel) const

       Informational methods

           bool valid () const
               Returns true if this PixelFormat is initialized, false
               otherwise.

   Protected Attributes
       SDL_PixelFormat* me
           The actual SDL_PixelFormat for this PixelFormat.

DETAILED DESCRIPTION
       Author:
           Adam Gates

CONSTRUCTOR & DESTRUCTOR DOCUMENTATION
   SDLmm::PixelFormat::PixelFormat (SDL_PixelFormat * pixelformat) [inline,
       explicit]
       Constructor from an SDL_PixelFormat*.

       This creates a new PixelFormat object from an existing SDL_PixelFormat.
       It's very important not to free the original pixel format since that
       will cause problems. Use with caution.

   SDLmm::PixelFormat::~PixelFormat () [inline, virtual]
       The destructor.

MEMBER FUNCTION DOCUMENTATION
   Uint8 SDLmm::PixelFormat::Aloss () const [inline]
   Uint32 SDLmm::PixelFormat::Amask () const [inline]
   Uint8 SDLmm::PixelFormat::BitsPerPixel () const [inline]
   Uint8 SDLmm::PixelFormat::Bloss () const [inline]
   Uint32 SDLmm::PixelFormat::Bmask () const [inline]
   Uint8 SDLmm::PixelFormat::Bshift () const [inline]
   Uint8 SDLmm::PixelFormat::BytesPerPixel () const [inline]
   const ColorRGB SDLmm::PixelFormat::GetRGB (Color pixel) const [inline]
   void SDLmm::PixelFormat::GetRGB (Color pixel, Uint8 & r, Uint8 & g, Uint8 &
       b) const
       Get RGB values from a pixel in the pixel format of this PixelFormat.

       This function uses the entire 8-bit [0..255] range when converting
       color components from pixel formats with less than 8-bits per RGB
       component (e.g., a completely white pixel in 16-bit RGB565 format would
       return [0xff, 0xff, 0xff] not [0xf8, 0xfc, 0xf8]).

       Parameters:

       pixel  the pixel value

       r, g, b
              references to integers where the RGB result will be stored.

       See also:
           GetRGBA, MapRGB, MapRGBA

   const ColorRGBA SDLmm::PixelFormat::GetRGBA (Color pixel) const [inline]
   void SDLmm::PixelFormat::GetRGBA (Color pixel, Uint8 & r, Uint8 & g, Uint8
       & b, Uint8 & a) const
       Get RGBA values from a pixel in the pixel format of this PixelFormat.

       This function uses the entire 8-bit [0..255] range when converting
       color components from pixel formats with less than 8-bits per RGB
       component (e.g., a completely white pixel in 16-bit RGB565 format would
       return [0xff, 0xff, 0xff] not [0xf8, 0xfc, 0xf8]).

       Note:
           If the PixelFormat has no alpha component, the alpha will be
           returned as 0xff (100% opaque).

       Parameters:

       pixel  the pixel value

       r, g, b, a
              references to integers where the RGBA result will be stored.

       See also:
           GetRGB, MapRGB, MapRGBA

   Uint8 SDLmm::PixelFormat::Gloss () const [inline]
   Uint32 SDLmm::PixelFormat::Gmask () const [inline]
   Uint8 SDLmm::PixelFormat::Gshift () const [inline]
   Color SDLmm::PixelFormat::MapRGB (const ColorRGB & colorrgb) const [inline]
   Color SDLmm::PixelFormat::MapRGB (Uint8 r, Uint8 g, Uint8 b) const
       Map a RGB color value to a pixel format.

       Maps the RGB color value to this PixelFormat's pixel format and returns
       the pixel value as a 32-bit int.

       If the format has a palette (8-bit) the index of the closest matching
       color in the palette will be returned.

       If the specified pixel format has an alpha component it will be
       returned as all 1 bits (fully opaque).

       Returns:
           A pixel value best approximating the given RGB color value for a
           given pixel format. If the pixel format bpp (color depth) is less
           than 32-bpp then the unused upper bits of the return value can
           safely be ignored (e.g., with a 16-bpp format the return value can
           be assigned to a Uint16, and similarly a Uint8 for an 8-bpp
           format).

       Parameters:

       r, g, b
              the RGB values.

       See also:
           GetRGB, GetRGBA, MapRGBA

   Color SDLmm::PixelFormat::MapRGBA (const ColorRGBA & colorrgba) const
       [inline]
   Color SDLmm::PixelFormat::MapRGBA (Uint8 r, Uint8 g, Uint8 b, Uint8 a)
       const
       Map a RGBA color value to a pixel format.

       Maps the RGBA color value to this PixelFormat's pixel format and
       returns the pixel value as a 32-bit int.

       If the format has a palette (8-bit) the index of the closest matching
       color in the palette will be returned.

       If the specified pixel format has no alpha component the alpha value
       will be ignored (as it will be in formats with a palette).

       Returns:
           A pixel value best approximating the given RGBA color value for a
           given pixel format. If the pixel format bpp (color depth) is less
           than 32-bpp then the unused upper bits of the return value can
           safely be ignored (e.g., with a 16-bpp format the return value can
           be assigned to a Uint16, and similarly a Uint8 for an 8-bpp
           format).

       Parameters:

       r, g, b, a
              the RGBA values.

       See also:
           GetRGB, GetRGBA, MapRGB

   Uint8 SDLmm::PixelFormat::Rloss () const [inline]
   Uint32 SDLmm::PixelFormat::Rmask () const [inline]
   Uint8 SDLmm::PixelFormat::Rshift () const [inline]
   Uint8 SDLmm::PixelFormat::alpha () const [inline]
   Color SDLmm::PixelFormat::colorkey () const [inline]
   SDL_Palette * SDLmm::PixelFormat::palette () const [inline]
   bool SDLmm::PixelFormat::valid () const [inline]
       Returns true if this PixelFormat is initialized, false otherwise.

       Warning:
           Using an uninitialzied PixelFormat can cause many problems.

MEMBER DATA DOCUMENTATION
   SDL_PixelFormat * SDLmm::PixelFormat::me [protected]
       The actual SDL_PixelFormat for this PixelFormat.

AUTHOR
       Generated automatically by Doxygen for SDLmm from the source code.



SDLmm                             16 Jul 2001            SDLmm::PixelFormat(3)
