Module interface:guifb - Graphics framebuffer infrastructure interface (low-level)

Index

• Channel type CT.GUI.FB - GUI framebuffer channel-type
  
  • Variable in? - Requests to framebuffer
  • Variable out! - Responses from framebuffer
• Record GUI.BUFFER - Individual framebuffer descriptor
  
  • Variable blit.xoff - X target offset when blitting
  • Variable blit.yoff - Y target offset when blitting
  • Variable bpl - Bytes per line
  • Variable bpp - Bits per pixel
  • Variable capabilities - Capabilties that we can do on this buffer (see )
  • Variable id - identifier (0-15 are special)
  • Variable is.vram - True if this buffer is real video memory
  • Variable vroffset - If in video memory, byte offset in video-memory where it starts
  • Variable xres - X resolution (pixels)
  • Variable yres - Y resolution (pixels)
• Data type GUI.FB.ARGB - Standard alpha-red-green-blue framebuffer type
• Group GUI.FB.CUR - Framebuffer cursor attributes
  
  • Constant GUI.FB.CUR.ENABLE - Enable cursor
  • Constant GUI.FB.CUR.SEL.MASK - Mask for cursor selection (0-31)
  • Constant GUI.FB.CUR.SEL.SHIFT - Bit-shift for cursor selection
• Group GUI.FB.FEAT - Framebuffer hardware-assist features
  
  • Constant GUI.FB.FEAT.BLIT - Hardware bit-blit support
  • Constant GUI.FB.FEAT.CIRCFILL - Hardware circle-fill support
  • Constant GUI.FB.FEAT.HWBUF - Hardware buffer support (relevant for higher levels)
  • Constant GUI.FB.FEAT.LINE - Hardware line-drawing support
  • Constant GUI.FB.FEAT.POINTER - Hardware cursor support
  • Constant GUI.FB.FEAT.RECTFILL - Hardware rectangle-fill support
  • Constant GUI.FB.FEAT.TEXT - Hardware text-drawing support
• Record GUI.FB.INFO - Generic framebuffer descriptor
  
  • Variable bpp - Bits per pixel
  • Variable features - Feature flags (see )
  • Variable packed - If non-zero, specifies a packed mode
  • Variable palette - If non-zero, has a hardware palette
  • Variable xres - X resolution (pixels)
  • Variable yres - Y resolution (pixels)
• Protocol P.GUI.FB.IN - GUI framebuffer input protocol
  
  • Tag close - Close, pass client end back
  • Tag get.buf - Gets a buffer from identifier, responds with result} or [@text fb.buffer]
  • Tag get.capability - Get capabilities, responds with fb.info
  • Tag new.buf - Create a new buffer of ( width,height,bpp and fillcolour ), responds with or
  • Tag paint.buf - Paint buffer on screen ( target.x,target.y,buffer.id )
  • Tag put.buf - Replace buffer (and paint)
• Protocol P.GUI.FB.OUT - GUI framebuffer output protocol
  
  • Tag fb.buffer - Returned framebuffer and descriptor
  • Tag fb.info - Returned framebuffer info
  • Tag result - Generic result

Declarations