- return n;
-}
-
-
-
-/**
- * Return number of bytes needed to store a texture of the given size
- * using the specified compressed format.
- * This is called via the ctx->Driver.CompressedTextureSize function,
- * unless a device driver overrides it.
- *
- * \param width texture width in texels.
- * \param height texture height in texels.
- * \param depth texture depth in texels.
- * \param mesaFormat one of the MESA_FORMAT_* compressed formats
- *
- * \return size in bytes, or zero if bad format
- */
-GLuint
-_mesa_compressed_texture_size( GLcontext *ctx,
- GLsizei width, GLsizei height, GLsizei depth,
- GLuint mesaFormat )
-{
- GLuint size;
-
- ASSERT(depth == 1);
- (void) depth;
- (void) size;
-
- switch (mesaFormat) {
-#if FEATURE_texture_fxt1
- case MESA_FORMAT_RGB_FXT1:
- case MESA_FORMAT_RGBA_FXT1:
- /* round up width to next multiple of 8, height to next multiple of 4 */
- width = (width + 7) & ~7;
- height = (height + 3) & ~3;
- /* 16 bytes per 8x4 tile of RGB[A] texels */
- size = width * height / 2;
- /* Textures smaller than 8x4 will effectively be made into 8x4 and
- * take 16 bytes.
- */
- return size;
-#endif
-#if FEATURE_texture_s3tc
- case MESA_FORMAT_RGB_DXT1:
- case MESA_FORMAT_RGBA_DXT1:
-#if FEATURE_EXT_texture_sRGB
- case MESA_FORMAT_SRGB_DXT1:
- case MESA_FORMAT_SRGBA_DXT1:
-#endif
- /* round up width, height to next multiple of 4 */
- width = (width + 3) & ~3;
- height = (height + 3) & ~3;
- /* 8 bytes per 4x4 tile of RGB[A] texels */
- size = width * height / 2;
- /* Textures smaller than 4x4 will effectively be made into 4x4 and
- * take 8 bytes.
- */
- return size;
- case MESA_FORMAT_RGBA_DXT3:
- case MESA_FORMAT_RGBA_DXT5: