texstore.c

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

/**
 * Store a 32-bit integer depth component texture image.
 */
GLboolean
_mesa_texstore_z32(TEXSTORE_PARAMS)
{
   const GLuint depthScale = 0xffffffff;
   (void) dims;
   ASSERT(dstFormat == &_mesa_texformat_z32);
   ASSERT(dstFormat->TexelBytes == sizeof(GLuint));

   if (!ctx->_ImageTransferState &&
       !srcPacking->SwapBytes &&
       baseInternalFormat == GL_DEPTH_COMPONENT &&
       srcFormat == GL_DEPTH_COMPONENT &&
       srcType == GL_UNSIGNED_INT) {
      /* simple memcpy path */
      memcpy_texture(ctx, dims,
                     dstFormat, dstAddr, dstXoffset, dstYoffset, dstZoffset,
                     dstRowStride,
                     dstImageOffsets,
                     srcWidth, srcHeight, srcDepth, srcFormat, srcType,
                     srcAddr, srcPacking);
   }
   else {
      /* general path */
      GLint img, row;
      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++) {
            const GLvoid *src = _mesa_image_address(dims, srcPacking,
                srcAddr, srcWidth, srcHeight, srcFormat, srcType, img, row, 0);
            _mesa_unpack_depth_span(ctx, srcWidth,
                                    GL_UNSIGNED_INT, (GLuint *) dstRow,
                                    depthScale, srcType, src, srcPacking);
            dstRow += dstRowStride;
         }
      }
   }
   return GL_TRUE;
}

#define STRIDE_3D 0

/**
 * Store a 16-bit integer depth component texture image.
 */
GLboolean
_mesa_texstore_z16(TEXSTORE_PARAMS)
{
   const GLuint depthScale = 0xffff;
   (void) dims;
   ASSERT(dstFormat == &_mesa_texformat_z16);
   ASSERT(dstFormat->TexelBytes == sizeof(GLushort));

   if (!ctx->_ImageTransferState &&
       !srcPacking->SwapBytes &&
       baseInternalFormat == GL_DEPTH_COMPONENT &&
       srcFormat == GL_DEPTH_COMPONENT &&
       srcType == GL_UNSIGNED_SHORT) {
      /* simple memcpy path */
      memcpy_texture(ctx, dims,
                     dstFormat, dstAddr, dstXoffset, dstYoffset, dstZoffset,
                     dstRowStride,
                     dstImageOffsets,
                     srcWidth, srcHeight, srcDepth, srcFormat, srcType,
                     srcAddr, srcPacking);
   }
   else {
      /* general path */
      GLint img, row;
      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++) {
            const GLvoid *src = _mesa_image_address(dims, srcPacking,
                srcAddr, srcWidth, srcHeight, srcFormat, srcType, img, row, 0);
            GLushort *dst16 = (GLushort *) dstRow;
            _mesa_unpack_depth_span(ctx, srcWidth,
                                    GL_UNSIGNED_SHORT, dst16, depthScale,
                                    srcType, src, srcPacking);
            dstRow += dstRowStride;
         }
      }
   }
   return GL_TRUE;
}


/**
 * Store an rgb565 or rgb565_rev texture image.
 */
GLboolean
_mesa_texstore_rgb565(TEXSTORE_PARAMS)
{
   ASSERT(dstFormat == &_mesa_texformat_rgb565 ||
          dstFormat == &_mesa_texformat_rgb565_rev);
   ASSERT(dstFormat->TexelBytes == 2);

   if (!ctx->_ImageTransferState &&
       !srcPacking->SwapBytes &&
       dstFormat == &_mesa_texformat_rgb565 &&
       baseInternalFormat == GL_RGB &&
       srcFormat == GL_RGB &&
       srcType == GL_UNSIGNED_SHORT_5_6_5) {
      /* 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 &&
            baseInternalFormat == GL_RGB &&
            srcFormat == GL_RGB &&
            srcType == GL_UNSIGNED_BYTE &&
            dims == 2) {
      /* do optimized tex store */
      const GLint srcRowStride = _mesa_image_row_stride(srcPacking, srcWidth,
                                                        srcFormat, srcType);
      const GLubyte *src = (const GLubyte *)
         _mesa_image_address(dims, srcPacking, srcAddr, srcWidth, srcHeight,
                             srcFormat, srcType, 0, 0, 0);
      GLubyte *dst = (GLubyte *) dstAddr
                   + dstYoffset * dstRowStride
                   + dstXoffset * dstFormat->TexelBytes;
      GLint row, col;
      for (row = 0; row < srcHeight; row++) {
         const GLubyte *srcUB = (const GLubyte *) src;
         GLushort *dstUS = (GLushort *) dst;
         /* check for byteswapped format */
         if (dstFormat == &_mesa_texformat_rgb565) {
            for (col = 0; col < srcWidth; col++) {
               dstUS[col] = PACK_COLOR_565( srcUB[0], srcUB[1], srcUB[2] );
               srcUB += 3;
            }
         }
         else {
            for (col = 0; col < srcWidth; col++) {
               dstUS[col] = PACK_COLOR_565_REV( srcUB[0], srcUB[1], srcUB[2] );
               srcUB += 3;
            }
         }
         dst += dstRowStride;
         src += srcRowStride;
      }
   }
   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++) {
            GLushort *dstUS = (GLushort *) dstRow;
            /* check for byteswapped format */
            if (dstFormat == &_mesa_texformat_rgb565) {
               for (col = 0; col < srcWidth; col++) {
                  dstUS[col] = PACK_COLOR_565( CHAN_TO_UBYTE(src[RCOMP]),
                                               CHAN_TO_UBYTE(src[GCOMP]),
                                               CHAN_TO_UBYTE(src[BCOMP]) );
                  src += 3;
               }
            }
            else {
               for (col = 0; col < srcWidth; col++) {
                  dstUS[col] = PACK_COLOR_565_REV( CHAN_TO_UBYTE(src[RCOMP]),
                                                   CHAN_TO_UBYTE(src[GCOMP]),
                                                   CHAN_TO_UBYTE(src[BCOMP]) );
                  src += 3;
               }
            }
            dstRow += dstRowStride;
         }
      }
      _mesa_free((void *) tempImage);
   }
   return GL_TRUE;
}


/**
 * Store a texture in MESA_FORMAT_RGBA8888 or MESA_FORMAT_RGBA8888_REV.
 */
GLboolean
_mesa_texstore_rgba8888(TEXSTORE_PARAMS)
{
   const GLboolean littleEndian = _mesa_little_endian();

   ASSERT(dstFormat == &_mesa_texformat_rgba8888 ||
          dstFormat == &_mesa_texformat_rgba8888_rev);
   ASSERT(dstFormat->TexelBytes == 4);

   if (!ctx->_ImageTransferState &&
       !srcPacking->SwapBytes &&
       dstFormat == &_mesa_texformat_rgba8888 &&
       baseInternalFormat == GL_RGBA &&
      ((srcFormat == GL_RGBA && srcType == GL_UNSIGNED_INT_8_8_8_8) ||
       (srcFormat == GL_RGBA && srcType == GL_UNSIGNED_BYTE && !littleEndian) ||
       (srcFormat == GL_ABGR_EXT && srcType == GL_UNSIGNED_INT_8_8_8_8_REV) ||
       (srcFormat == GL_ABGR_EXT && 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 &&
       dstFormat == &_mesa_texformat_rgba8888_rev &&
       baseInternalFormat == GL_RGBA &&
      ((srcFormat == GL_RGBA && srcType == GL_UNSIGNED_INT_8_8_8_8_REV) ||
       (srcFormat == GL_RGBA && srcType == GL_UNSIGNED_BYTE && littleEndian) ||
       (srcFormat == GL_ABGR_EXT && srcType == GL_UNSIGNED_INT_8_8_8_8) ||
       (srcFormat == GL_ABGR_EXT && 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 &&
	    (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_rgba8888) ||
	  (!littleEndian && dstFormat == &_mesa_texformat_rgba8888_rev)) {
	 dstmap[3] = 0;
	 dstmap[2] = 1;
	 dstmap[1] = 2;
	 dstmap[0] = 3;
      }
      else {
	 dstmap[3] = 3;
	 dstmap[2] = 2;
	 dstmap[1] = 1;
	 dstmap[0] = 0;
      }
      
      _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_rgba8888) {
               for (col = 0; col < srcWidth; col++) {
                  dstUI[col] = PACK_COLOR_8888( CHAN_TO_UBYTE(src[RCOMP]),
                                                CHAN_TO_UBYTE(src[GCOMP]),
                                                CHAN_TO_UBYTE(src[BCOMP]),
                                                CHAN_TO_UBYTE(src[ACOMP]) );
                  src += 4;
               }
            }
            else {
               for (col = 0; col < srcWidth; col++) {
                  dstUI[col] = PACK_COLOR_8888_REV( CHAN_TO_UBYTE(src[RCOMP]),
                                                    CHAN_TO_UBYTE(src[GCOMP]),
                                                    CHAN_TO_UBYTE(src[BCOMP]),
                                                    CHAN_TO_UBYTE(src[ACOMP]) );
                  src += 4;
               }
            }
            dstRow += dstRowStride;
         }
      }
      _mesa_free((void *) tempImage);
   }
   return GL_TRUE;
}


GLboolean
_mesa_texstore_argb8888(TEXSTORE_PARAMS)
{
   const GLboolean littleEndian = _mesa_little_endian();

   ASSERT(dstFormat == &_mesa_texformat_argb8888 ||
          dstFormat == &_mesa_texformat_argb8888_rev);
   ASSERT(dstFormat->TexelBytes == 4);

   if (!ctx->_ImageTransferState &&
       !srcPacking->SwapBytes &&
       dstFormat == &_mesa_texformat_argb8888 &&
       baseInternalFormat == GL_RGBA &&
       srcFormat == GL_BGRA &&
       ((srcType == GL_UNSIGNED_BYTE && littleEndian) ||
        srcType == GL_UNSIGNED_INT_8_8_8_8_REV)) {
      /* simple memcpy path (little endian) */
      memcpy_texture(ctx, dims,
                     dstFormat, dstAddr, dstXoffset, dstYoffset, dstZoffset,
                     dstRowStride,
                     dstImageOffsets,
                     srcWidth, srcHeight, srcDepth, srcFormat, srcType,
                     srcAddr, srcPacking);
   }
   else if (!ctx->_ImageTransferState &&
       !srcPacking->SwapBytes &&
       dstFormat == &_mesa_texformat_argb8888_rev &&
       baseInternalFormat == GL_RGBA &&
       srcFormat == GL_BGRA &&
       ((srcType == GL_UNSIGNED_BYTE && !littleEndian) ||
        srcType == GL_UNSIGNED_INT_8_8_8_8)) {
      /* simple memcpy path (big endian) */
      memcpy_texture(ctx, dims,
                     dstFormat, dstAddr, dstXoffset, dstYoffset, dstZoffset,
                     dstRowStride,
                     dstImageOffsets,
                     srcWidth, srcHeight, srcDepth, srcFormat, srcType,
                     srcAddr, srcPacking);
   }
   else if (!ctx->_ImageTransferState &&
            !srcPacking->SwapBytes &&
	    dstFormat == &_mesa_texformat_argb8888 &&
            srcFormat == GL_RGB &&
	    (baseInternalFormat == GL_RGBA ||
	     baseInternalFormat == GL_RGB) &&
            srcType == GL_UNSIGNED_BYTE) {
      int img, row, col;
      for (img = 0; img < srcDepth; img++) {
         const GLint srcRowStride = _mesa_image_row_stride(srcPacking,
                                                 srcWidth, srcFormat, srcType);