C++ (Cpp) signed_encode_rgtc_ubyte Examples

Example #1

File: texcompress_rgtc.c Project: DirectFB/mesa

GLboolean
_mesa_texstore_signed_rg_rgtc2(TEXSTORE_PARAMS)
{
   GLbyte *dst;
   const GLfloat *tempImage = NULL;
   int i, j;
   int numxpixels, numypixels;
   const GLfloat *srcaddr;
   GLbyte srcpixels[4][4];
   GLbyte *blkaddr;
   GLint dstRowDiff;

   ASSERT(dstFormat == MESA_FORMAT_RG_RGTC2_SNORM ||
          dstFormat == MESA_FORMAT_LA_LATC2_SNORM);

   tempImage = _mesa_make_temp_float_image(ctx, dims,
					   baseInternalFormat,
					   _mesa_get_format_base_format(dstFormat),
					   srcWidth, srcHeight, srcDepth,
					   srcFormat, srcType, srcAddr,
					   srcPacking, 0x0);
   if (!tempImage)
      return GL_FALSE; /* out of memory */

   dst = (GLbyte *) dstSlices[0];

   blkaddr = dst;
   dstRowDiff = dstRowStride >= (srcWidth * 4) ? dstRowStride - (((srcWidth + 3) & ~3) * 4) : 0;
   for (j = 0; j < srcHeight; j += 4) {
      if (srcHeight > j + 3) numypixels = 4;
      else numypixels = srcHeight - j;
      srcaddr = tempImage + j * srcWidth * 2;
      for (i = 0; i < srcWidth; i += 4) {
	 if (srcWidth > i + 3) numxpixels = 4;
	 else numxpixels = srcWidth - i;

	 extractsrc_s(srcpixels, srcaddr, srcWidth, numxpixels, numypixels, 2);
	 signed_encode_rgtc_ubyte(blkaddr, srcpixels, numxpixels, numypixels);
	 blkaddr += 8;

	 extractsrc_s(srcpixels, srcaddr + 1, srcWidth, numxpixels, numypixels, 2);
	 signed_encode_rgtc_ubyte(blkaddr, srcpixels, numxpixels, numypixels);
	 blkaddr += 8;

	 srcaddr += numxpixels * 2;

      }
      blkaddr += dstRowDiff;
   }

   free((void *) tempImage);

   return GL_TRUE;
}

Example #2

File: texcompress_rgtc.c Project: mlankhorst/Mesa-3D

GLboolean
_mesa_texstore_signed_red_rgtc1(TEXSTORE_PARAMS)
{
   GLbyte *dst;
   const GLint texWidth = dstRowStride * 4 / 8; /* a bit of a hack */
   const GLfloat *tempImage = NULL;
   int i, j;
   int numxpixels, numypixels;
   const GLfloat *srcaddr;
   GLbyte srcpixels[4][4];
   GLbyte *blkaddr;
   GLint dstRowDiff;
   ASSERT(dstFormat == MESA_FORMAT_SIGNED_RED_RGTC1 ||
          dstFormat == MESA_FORMAT_SIGNED_L_LATC1);
   ASSERT(dstXoffset % 4 == 0);
   ASSERT(dstYoffset % 4 == 0);
   ASSERT(dstZoffset % 4 == 0);
   (void) dstZoffset;

   tempImage = _mesa_make_temp_float_image(ctx, dims,
					   baseInternalFormat,
					   _mesa_get_format_base_format(dstFormat),
					   srcWidth, srcHeight, srcDepth,
					   srcFormat, srcType, srcAddr,
					   srcPacking, 0x0);
   if (!tempImage)
      return GL_FALSE; /* out of memory */

   dst = (GLbyte *)_mesa_compressed_image_address(dstXoffset, dstYoffset, 0,
						  dstFormat,
						  texWidth, dstSlices[0]);

   blkaddr = dst;
   dstRowDiff = dstRowStride >= (srcWidth * 2) ? dstRowStride - (((srcWidth + 3) & ~3) * 2) : 0;
   for (j = 0; j < srcHeight; j+=4) {
      if (srcHeight > j + 3) numypixels = 4;
      else numypixels = srcHeight - j;
      srcaddr = tempImage + j * srcWidth;
      for (i = 0; i < srcWidth; i += 4) {
	 if (srcWidth > i + 3) numxpixels = 4;
	 else numxpixels = srcWidth - i;
	 extractsrc_s(srcpixels, srcaddr, srcWidth, numxpixels, numypixels, 1);
	 signed_encode_rgtc_ubyte(blkaddr, srcpixels, numxpixels, numypixels);
	 srcaddr += numxpixels;
	 blkaddr += 8;
      }
      blkaddr += dstRowDiff;
   }
   if (tempImage)
      free((void *) tempImage);

   return GL_TRUE;
}