C++ (Cpp) unsigned_encode_rgtc_ubyte Examples

Example #1

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

GLboolean
_mesa_texstore_rg_rgtc2(TEXSTORE_PARAMS)
{
   GLubyte *dst;
   const GLint texWidth = dstRowStride * 4 / 16; /* a bit of a hack */
   const GLubyte *tempImage = NULL;
   int i, j;
   int numxpixels, numypixels;
   const GLubyte *srcaddr;
   GLubyte srcpixels[4][4];
   GLubyte *blkaddr;
   GLint dstRowDiff;

   ASSERT(dstFormat == MESA_FORMAT_RG_RGTC2 ||
          dstFormat == MESA_FORMAT_LA_LATC2);
   ASSERT(dstXoffset % 4 == 0);
   ASSERT(dstYoffset % 4 == 0);
   ASSERT(dstZoffset % 4 == 0);
   (void) dstZoffset;

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

   dst = _mesa_compressed_image_address(dstXoffset, dstYoffset, 0,
                                        dstFormat,
                                        texWidth, 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_u(srcpixels, srcaddr, srcWidth, numxpixels, numypixels, 2);
	 unsigned_encode_rgtc_ubyte(blkaddr, srcpixels, numxpixels, numypixels);

	 blkaddr += 8;
	 extractsrc_u(srcpixels, (GLubyte *)srcaddr + 1, srcWidth, numxpixels, numypixels, 2);
	 unsigned_encode_rgtc_ubyte(blkaddr, srcpixels, numxpixels, numypixels);

	 blkaddr += 8;

	 srcaddr += numxpixels * 2;
      }
      blkaddr += dstRowDiff;
   }
   if (tempImage)
      free((void *) tempImage);

   return GL_TRUE;
}

Example #2

File: texcompress_rgtc.c Project: DirectFB/mesa

GLboolean
_mesa_texstore_red_rgtc1(TEXSTORE_PARAMS)
{
   GLubyte *dst;
   const GLubyte *tempImage = NULL;
   int i, j;
   int numxpixels, numypixels;
   const GLubyte *srcaddr;
   GLubyte srcpixels[4][4];
   GLubyte *blkaddr;
   GLint dstRowDiff;
   ASSERT(dstFormat == MESA_FORMAT_R_RGTC1_UNORM ||
          dstFormat == MESA_FORMAT_L_LATC1_UNORM);

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

   dst = 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_u(srcpixels, srcaddr, srcWidth, numxpixels, numypixels, 1);
	 unsigned_encode_rgtc_ubyte(blkaddr, srcpixels, numxpixels, numypixels);
	 srcaddr += numxpixels;
	 blkaddr += 8;
      }
      blkaddr += dstRowDiff;
   }

   free((void *) tempImage);

   return GL_TRUE;
}