C++ (Cpp) util_format_signed_encode_rgtc_ubyte Examples

Example #1

File: texcompress_rgtc.c Project: chrisforbes/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);
	 util_format_signed_encode_rgtc_ubyte(blkaddr, srcpixels, numxpixels, numypixels);
	 blkaddr += 8;

	 extractsrc_s(srcpixels, srcaddr + 1, srcWidth, numxpixels, numypixels, 2);
	 util_format_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: airlied/mesa

GLboolean
_mesa_texstore_signed_red_rgtc1(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, redRowStride;
   GLfloat *tempImageSlices[1];

   assert(dstFormat == MESA_FORMAT_R_RGTC1_SNORM ||
          dstFormat == MESA_FORMAT_L_LATC1_SNORM);

   redRowStride = 1 * srcWidth * sizeof(GLfloat);
   tempImage = malloc(srcWidth * srcHeight * 1 * sizeof(GLfloat));
   if (!tempImage)
      return GL_FALSE; /* out of memory */
   tempImageSlices[0] = (GLfloat *) tempImage;
   _mesa_texstore(ctx, dims,
                  baseInternalFormat,
                  MESA_FORMAT_R_FLOAT32,
                  redRowStride, (GLubyte **)tempImageSlices,
                  srcWidth, srcHeight, srcDepth,
                  srcFormat, srcType, srcAddr,
                  srcPacking);

   dst = (GLbyte *) 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);
	 util_format_signed_encode_rgtc_ubyte(blkaddr, srcpixels, numxpixels, numypixels);
	 srcaddr += numxpixels;
	 blkaddr += 8;
      }
      blkaddr += dstRowDiff;
   }

   free((void *) tempImage);

   return GL_TRUE;
}

Example #3

File: u_format_rgtc.c Project: ChristophHaag/mesa-mesa

void
util_format_rxtc2_snorm_pack_rgba_float(uint8_t *dst_row, unsigned dst_stride, const float *src_row, unsigned src_stride, unsigned width, unsigned height, unsigned chan2off)
{
   const unsigned bw = 4, bh = 4, bytes_per_block = 16;
   unsigned x, y, i, j;

   for(y = 0; y < height; y += bh) {
      int8_t *dst = (int8_t *)dst_row;
      for(x = 0; x < width; x += bw) {
         int8_t tmp_r[4][4];  /* [bh][bw][comps] */
         int8_t tmp_g[4][4];  /* [bh][bw][comps] */
         for(j = 0; j < bh; ++j) {
            for(i = 0; i < bw; ++i) {
	       tmp_r[j][i] = float_to_byte_tex(src_row[(y + j)*src_stride/sizeof(*src_row) + (x + i)*4]);
               tmp_g[j][i] = float_to_byte_tex(src_row[(y + j)*src_stride/sizeof(*src_row) + (x + i)*4 + chan2off]);
            }
         }
         util_format_signed_encode_rgtc_ubyte(dst, tmp_r, 4, 4);
         util_format_signed_encode_rgtc_ubyte(dst + 8, tmp_g, 4, 4);
         dst += bytes_per_block;
      }
      dst_row += dst_stride / sizeof(*dst_row);
   }
}