libfreerdp/codec/color.h

 
#ifndef FREERDP_LIB_CODEC_COLOR_H
#define FREERDP_LIB_CODEC_COLOR_H
 
#include <winpr/winpr.h>
#include <winpr/wtypes.h>
 
#include <freerdp/codec/color.h>
#include <freerdp/log.h>
 
#define INT_COLOR_TAG FREERDP_TAG("codec.color.h")
 
WINPR_ATTR_NODISCARD
static inline DWORD FreeRDPAreColorFormatsEqualNoAlpha_int(DWORD first, DWORD second)
{
  const DWORD mask = (DWORD) ~(8UL << 12UL);
  return (first & mask) == (second & mask);
}
 
WINPR_ATTR_NODISCARD
static inline BOOL FreeRDPWriteColor_int(BYTE* WINPR_RESTRICT dst, UINT32 format, UINT32 color)
{
  switch (FreeRDPGetBitsPerPixel(format))
  {
    case 32:
      dst[0] = (BYTE)(color >> 24);
      dst[1] = (BYTE)(color >> 16);
      dst[2] = (BYTE)(color >> 8);
      dst[3] = (BYTE)color;
      break;
 
    case 24:
      dst[0] = (BYTE)(color >> 16);
      dst[1] = (BYTE)(color >> 8);
      dst[2] = (BYTE)color;
      break;
 
    case 16:
      dst[1] = (BYTE)(color >> 8);
      dst[0] = (BYTE)color;
      break;
 
    case 15:
      if (!FreeRDPColorHasAlpha(format))
        color = color & 0x7FFF;
 
      dst[1] = (BYTE)(color >> 8);
      dst[0] = (BYTE)color;
      break;
 
    case 8:
      dst[0] = (BYTE)color;
      break;
 
    default:
      WLog_ERR(INT_COLOR_TAG, "Unsupported format %s", FreeRDPGetColorFormatName(format));
      return FALSE;
  }
 
  return TRUE;
}
 
WINPR_ATTR_NODISCARD
static inline BOOL FreeRDPWriteColorIgnoreAlpha_int(BYTE* WINPR_RESTRICT dst, UINT32 format,
                                                    UINT32 color)
{
  switch (format)
  {
    case PIXEL_FORMAT_XBGR32:
    case PIXEL_FORMAT_XRGB32:
    case PIXEL_FORMAT_ABGR32:
    case PIXEL_FORMAT_ARGB32:
    {
      const UINT32 tmp = ((UINT32)dst[0] << 24ULL) | (color & 0x00FFFFFFULL);
      return FreeRDPWriteColor_int(dst, format, tmp);
    }
    case PIXEL_FORMAT_BGRX32:
    case PIXEL_FORMAT_RGBX32:
    case PIXEL_FORMAT_BGRA32:
    case PIXEL_FORMAT_RGBA32:
    {
      const UINT32 tmp = ((UINT32)dst[3]) | (color & 0xFFFFFF00ULL);
      return FreeRDPWriteColor_int(dst, format, tmp);
    }
    default:
      return FreeRDPWriteColor_int(dst, format, color);
  }
}
 
WINPR_ATTR_NODISCARD
static inline UINT32 FreeRDPReadColor_int(const BYTE* WINPR_RESTRICT src, UINT32 format)
{
  UINT32 color = 0;
 
  switch (FreeRDPGetBitsPerPixel(format))
  {
    case 32:
      color =
          ((UINT32)src[0] << 24) | ((UINT32)src[1] << 16) | ((UINT32)src[2] << 8) | src[3];
      break;
 
    case 24:
      color = ((UINT32)src[0] << 16) | ((UINT32)src[1] << 8) | src[2];
      break;
 
    case 16:
      color = ((UINT32)src[1] << 8) | src[0];
      break;
 
    case 15:
      color = ((UINT32)src[1] << 8) | src[0];
 
      if (!FreeRDPColorHasAlpha(format))
        color = color & 0x7FFF;
 
      break;
 
    case 8:
    case 4:
    case 1:
      color = *src;
      break;
 
    default:
      WLog_ERR(INT_COLOR_TAG, "Unsupported format %s", FreeRDPGetColorFormatName(format));
      color = 0;
      break;
  }
 
  return color;
}
 
#endif