texstore.c

Mesa is an open-source implementation of the OpenGL specification - a system for rendering interacti

         GLubyte *srcRow = (GLubyte *) _mesa_image_address(dims, srcPacking,
                  srcAddr, srcWidth, srcHeight, srcFormat, srcType, img, 0, 0);
         GLubyte *dstRow = (GLubyte *) dstAddr
            + dstImageOffsets[dstZoffset + img] * dstFormat->TexelBytes
            + dstYoffset * dstRowStride
            + dstXoffset * dstFormat->TexelBytes;
         for (row = 0; row < srcHeight; row++) {
            GLuint *d4 = (GLuint *) dstRow;
            for (col = 0; col < srcWidth; col++) {
               d4[col] = ((0xff                    << 24) |
                          (srcRow[col * 3 + RCOMP] << 16) |
                          (srcRow[col * 3 + GCOMP] <<  8) |
                          (srcRow[col * 3 + BCOMP] <<  0));
            }
            dstRow += dstRowStride;
            srcRow += srcRowStride;
         }
      }
   }
   else if (!ctx->_ImageTransferState &&
            !srcPacking->SwapBytes &&
	    dstFormat == &_mesa_texformat_argb8888 &&
            srcFormat == GL_RGBA &&
	    baseInternalFormat == GL_RGBA &&
            srcType == GL_UNSIGNED_BYTE &&
            littleEndian) {
      /* same as above case, but src data has alpha too */
      GLint img, row, col;
      /* For some reason, streaming copies to write-combined regions
       * are extremely sensitive to the characteristics of how the
       * source data is retrieved.  By reordering the source reads to
       * be in-order, the speed of this operation increases by half.
       * Strangely the same isn't required for the RGB path, above.
       */
      for (img = 0; img < srcDepth; img++) {
         const GLint srcRowStride = _mesa_image_row_stride(srcPacking,
                                                 srcWidth, srcFormat, srcType);
         GLubyte *srcRow = (GLubyte *) _mesa_image_address(dims, srcPacking,
                  srcAddr, srcWidth, srcHeight, srcFormat, srcType, img, 0, 0);
         GLubyte *dstRow = (GLubyte *) dstAddr
            + dstImageOffsets[dstZoffset + img] * dstFormat->TexelBytes
            + dstYoffset * dstRowStride
            + dstXoffset * dstFormat->TexelBytes;
         for (row = 0; row < srcHeight; row++) {
            GLuint *d4 = (GLuint *) dstRow;
            for (col = 0; col < srcWidth; col++) {
               d4[col] = ((srcRow[col * 4 + ACOMP] << 24) |
                          (srcRow[col * 4 + RCOMP] << 16) |
                          (srcRow[col * 4 + GCOMP] <<  8) |
                          (srcRow[col * 4 + BCOMP] <<  0));
            }
            dstRow += dstRowStride;
            srcRow += srcRowStride;
         }
      }
   }
   else if (!ctx->_ImageTransferState &&
            !srcPacking->SwapBytes &&
	    dstFormat == &_mesa_texformat_argb8888 &&
            srcFormat == GL_RGBA &&
	    baseInternalFormat == GL_RGBA &&
            srcType == GL_UNSIGNED_BYTE) {

      GLint img, row, col;
      for (img = 0; img < srcDepth; img++) {
         const GLint srcRowStride = _mesa_image_row_stride(srcPacking,
                                                 srcWidth, srcFormat, srcType);
         GLubyte *srcRow = (GLubyte *) _mesa_image_address(dims, srcPacking,
                  srcAddr, srcWidth, srcHeight, srcFormat, srcType, img, 0, 0);
         GLubyte *dstRow = (GLubyte *) dstAddr
            + dstImageOffsets[dstZoffset + img] * dstFormat->TexelBytes
            + dstYoffset * dstRowStride
            + dstXoffset * dstFormat->TexelBytes;
         for (row = 0; row < srcHeight; row++) {
            for (col = 0; col < srcWidth; col++) {
               dstRow[col * 4 + 0] = srcRow[col * 4 + BCOMP];
               dstRow[col * 4 + 1] = srcRow[col * 4 + GCOMP];
               dstRow[col * 4 + 2] = srcRow[col * 4 + RCOMP];
               dstRow[col * 4 + 3] = srcRow[col * 4 + ACOMP];
            }
            dstRow += dstRowStride;
            srcRow += srcRowStride;
         }
      }
   }
   else if (!ctx->_ImageTransferState &&
	    (srcType == GL_UNSIGNED_BYTE ||
	     srcType == GL_UNSIGNED_INT_8_8_8_8 ||
	     srcType == GL_UNSIGNED_INT_8_8_8_8_REV) &&
	    can_swizzle(baseInternalFormat) &&	   
	    can_swizzle(srcFormat)) {

      GLubyte dstmap[4];

      /* dstmap - how to swizzle from RGBA to dst format:
       */
      if ((littleEndian && dstFormat == &_mesa_texformat_argb8888) ||
	  (!littleEndian && dstFormat == &_mesa_texformat_argb8888_rev)) {
	 dstmap[3] = 3;		/* alpha */
	 dstmap[2] = 0;		/* red */
	 dstmap[1] = 1;		/* green */
	 dstmap[0] = 2;		/* blue */
      }
      else {
	 assert((littleEndian && dstFormat == &_mesa_texformat_argb8888_rev) ||
		(!littleEndian && dstFormat == &_mesa_texformat_argb8888));
	 dstmap[3] = 2;
	 dstmap[2] = 1;
	 dstmap[1] = 0;
	 dstmap[0] = 3;
      }
 
      _mesa_swizzle_ubyte_image(ctx, dims,
				srcFormat,
				srcType,

				baseInternalFormat,
				dstmap, 4,
				dstAddr, dstXoffset, dstYoffset, dstZoffset,
				dstRowStride,
                                dstImageOffsets,
				srcWidth, srcHeight, srcDepth, srcAddr,
				srcPacking);      
   }
   else {
      /* general path */
      const GLchan *tempImage = _mesa_make_temp_chan_image(ctx, dims,
                                                 baseInternalFormat,
                                                 dstFormat->BaseFormat,
                                                 srcWidth, srcHeight, srcDepth,
                                                 srcFormat, srcType, srcAddr,
                                                 srcPacking);
      const GLchan *src = tempImage;
      GLint img, row, col;
      if (!tempImage)
         return GL_FALSE;
      _mesa_adjust_image_for_convolution(ctx, dims, &srcWidth, &srcHeight);
      for (img = 0; img < srcDepth; img++) {
         GLubyte *dstRow = (GLubyte *) dstAddr
            + dstImageOffsets[dstZoffset + img] * dstFormat->TexelBytes
            + dstYoffset * dstRowStride
            + dstXoffset * dstFormat->TexelBytes;
         for (row = 0; row < srcHeight; row++) {
            GLuint *dstUI = (GLuint *) dstRow;
            if (dstFormat == &_mesa_texformat_argb8888) {
               for (col = 0; col < srcWidth; col++) {
                  dstUI[col] = PACK_COLOR_8888( CHAN_TO_UBYTE(src[ACOMP]),
                                                CHAN_TO_UBYTE(src[RCOMP]),
                                                CHAN_TO_UBYTE(src[GCOMP]),
                                                CHAN_TO_UBYTE(src[BCOMP]) );
                  src += 4;
               }
            }
            else {
               for (col = 0; col < srcWidth; col++) {
                  dstUI[col] = PACK_COLOR_8888_REV( CHAN_TO_UBYTE(src[ACOMP]),
                                                    CHAN_TO_UBYTE(src[RCOMP]),
                                                    CHAN_TO_UBYTE(src[GCOMP]),
                                                    CHAN_TO_UBYTE(src[BCOMP]) );
                  src += 4;
               }
            }
            dstRow += dstRowStride;
         }
      }
      _mesa_free((void *) tempImage);
   }
   return GL_TRUE;
}


GLboolean
_mesa_texstore_rgb888(TEXSTORE_PARAMS)
{
   const GLboolean littleEndian = _mesa_little_endian();

   ASSERT(dstFormat == &_mesa_texformat_rgb888);
   ASSERT(dstFormat->TexelBytes == 3);

   if (!ctx->_ImageTransferState &&
       !srcPacking->SwapBytes &&
       baseInternalFormat == GL_RGB &&
       srcFormat == GL_BGR &&
       srcType == GL_UNSIGNED_BYTE &&
       littleEndian) {
      /* simple memcpy path */
      memcpy_texture(ctx, dims,
                     dstFormat, dstAddr, dstXoffset, dstYoffset, dstZoffset,
                     dstRowStride,
                     dstImageOffsets,
                     srcWidth, srcHeight, srcDepth, srcFormat, srcType,
                     srcAddr, srcPacking);
   }
   else if (!ctx->_ImageTransferState &&
            !srcPacking->SwapBytes &&
            srcFormat == GL_RGBA &&
            srcType == GL_UNSIGNED_BYTE) {
      /* extract RGB from RGBA */
      GLint img, row, col;
      for (img = 0; img < srcDepth; img++) {
         const GLint srcRowStride = _mesa_image_row_stride(srcPacking,
                                                 srcWidth, srcFormat, srcType);
         GLubyte *srcRow = (GLubyte *) _mesa_image_address(dims, srcPacking,
                  srcAddr, srcWidth, srcHeight, srcFormat, srcType, img, 0, 0);
         GLubyte *dstRow = (GLubyte *) dstAddr
            + dstImageOffsets[dstZoffset + img] * dstFormat->TexelBytes
            + dstYoffset * dstRowStride
            + dstXoffset * dstFormat->TexelBytes;
         for (row = 0; row < srcHeight; row++) {
            for (col = 0; col < srcWidth; col++) {
               dstRow[col * 3 + 0] = srcRow[col * 4 + BCOMP];
               dstRow[col * 3 + 1] = srcRow[col * 4 + GCOMP];
               dstRow[col * 3 + 2] = srcRow[col * 4 + RCOMP];
            }
            dstRow += dstRowStride;
            srcRow += srcRowStride;
         }
      }
   }
   else if (!ctx->_ImageTransferState &&
	    srcType == GL_UNSIGNED_BYTE &&
	    can_swizzle(baseInternalFormat) &&
	    can_swizzle(srcFormat)) {

      GLubyte dstmap[4];

      /* dstmap - how to swizzle from RGBA to dst format:
       */
      dstmap[0] = 2;
      dstmap[1] = 1;
      dstmap[2] = 0;
      dstmap[3] = ONE;		/* ? */
      
      _mesa_swizzle_ubyte_image(ctx, dims,
				srcFormat,
				srcType,
				baseInternalFormat,
				dstmap, 3,
				dstAddr, dstXoffset, dstYoffset, dstZoffset,
				dstRowStride, dstImageOffsets,
				srcWidth, srcHeight, srcDepth, srcAddr,
				srcPacking);      
   }
   else {
      /* general path */
      const GLchan *tempImage = _mesa_make_temp_chan_image(ctx, dims,
                                                 baseInternalFormat,
                                                 dstFormat->BaseFormat,
                                                 srcWidth, srcHeight, srcDepth,
                                                 srcFormat, srcType, srcAddr,
                                                 srcPacking);
      const GLchan *src = (const GLchan *) tempImage;
      GLint img, row, col;
      if (!tempImage)
         return GL_FALSE;
      _mesa_adjust_image_for_convolution(ctx, dims, &srcWidth, &srcHeight);
      for (img = 0; img < srcDepth; img++) {
         GLubyte *dstRow = (GLubyte *) dstAddr
            + dstImageOffsets[dstZoffset + img] * dstFormat->TexelBytes
            + dstYoffset * dstRowStride
            + dstXoffset * dstFormat->TexelBytes;
         for (row = 0; row < srcHeight; row++) {
#if 0
            if (littleEndian) {
               for (col = 0; col < srcWidth; col++) {
                  dstRow[col * 3 + 0] = CHAN_TO_UBYTE(src[RCOMP]);
                  dstRow[col * 3 + 1] = CHAN_TO_UBYTE(src[GCOMP]);
                  dstRow[col * 3 + 2] = CHAN_TO_UBYTE(src[BCOMP]);
                  srcUB += 3;
               }
            }
            else {
               for (col = 0; col < srcWidth; col++) {
                  dstRow[col * 3 + 0] = srcUB[BCOMP];
                  dstRow[col * 3 + 1] = srcUB[GCOMP];
                  dstRow[col * 3 + 2] = srcUB[RCOMP];
                  srcUB += 3;
               }
            }
#else
            for (col = 0; col < srcWidth; col++) {
               dstRow[col * 3 + 0] = CHAN_TO_UBYTE(src[BCOMP]);
               dstRow[col * 3 + 1] = CHAN_TO_UBYTE(src[GCOMP]);
               dstRow[col * 3 + 2] = CHAN_TO_UBYTE(src[RCOMP]);
               src += 3;
            }
#endif
            dstRow += dstRowStride;
         }
      }
      _mesa_free((void *) tempImage);
   }
   return GL_TRUE;
}


GLboolean
_mesa_texstore_bgr888(TEXSTORE_PARAMS)
{
   const GLboolean littleEndian = _mesa_little_endian();

   ASSERT(dstFormat == &_mesa_texformat_bgr888);
   ASSERT(dstFormat->TexelBytes == 3);

   if (!ctx->_ImageTransferState &&
       !srcPacking->SwapBytes &&
       baseInternalFormat == GL_RGB &&
       srcFormat == GL_RGB &&
       srcType == GL_UNSIGNED_BYTE &&
       littleEndian) {
      /* simple memcpy path */
      memcpy_texture(ctx, dims,
                     dstFormat, dstAddr, dstXoffset, dstYoffset, dstZoffset,
                     dstRowStride,
                     dstImageOffsets,
                     srcWidth, srcHeight, srcDepth, srcFormat, srcType,
                     srcAddr, srcPacking);
   }
   else if (!ctx->_ImageTransferState &&
            !srcPacking->SwapBytes &&
            srcFormat == GL_RGBA &&
            srcType == GL_UNSIGNED_BYTE) {
      /* extract BGR from RGBA */
      int img, row, col;
      for (img = 0; img < srcDepth; img++) {
         const GLint srcRowStride = _mesa_image_row_stride(srcPacking,
                                                 srcWidth, srcFormat, srcType);
         GLubyte *srcRow = (GLubyte *) _mesa_image_address(dims, srcPacking,
                  srcAddr, srcWidth, srcHeight, srcFormat, srcType, img, 0, 0);
         GLubyte *dstRow = (GLubyte *) dstAddr
            + dstImageOffsets[dstZoffset + img] * dstFormat->TexelBytes
            + dstYoffset * dstRowStride
            + dstXoffset * dstFormat->TexelBytes;
         for (row = 0; row < srcHeight; row++) {
            for (col = 0; col < srcWidth; col++) {
               dstRow[col * 3 + 0] = srcRow[col * 4 + RCOMP];
               dstRow[col * 3 + 1] = srcRow[col * 4 + GCOMP];
               dstRow[col * 3 + 2] = srcRow[col * 4 + BCOMP];
            }
            dstRow += dstRowStride;
            srcRow += srcRowStride;
         }
      }
   }
   else if (!ctx->_ImageTransferState &&
	    srcType == GL_UNSIGNED_BYTE &&
	    can_swizzle(baseInternalFormat) &&
	    can_swizzle(srcFormat)) {

      GLubyte dstmap[4];

      /* dstmap - how to swizzle from RGBA to dst format:
       */
      dstmap[0] = 0;
      dstmap[1] = 1;
      dstmap[2] = 2;
      dstmap[3] = ONE;		/* ? */
      
      _mesa_swizzle_ubyte_image(ctx, dims,
				srcFormat,
				srcType,
				baseInternalFormat,
				dstmap, 3,
				dstAddr, dstXoffset, dstYoffset, dstZoffset,
				dstRowStride, dstImageOffsets,
				srcWidth, srcHeight, srcDepth, srcAddr,
				srcPacking);      
   }   
   else {
      /* general path */
      const GLchan *tempImage = _mesa_make_temp_chan_image(ctx, dims,
                                                 baseInternalFormat,
                                                 dstFormat->BaseFormat,