- /** These fields only valid when texture memory is mapped */
- GLint RowStride; /**< Padded width in units of texels */
- GLuint *ImageOffsets; /**< if 3D texture: array [Depth] of offsets to
- each 2D slice in 'Data', in texels */
- GLubyte *Map; /**< Pointer to mapped image memory */
+ /**
+ * Byte stride between rows in ImageSlices.
+ *
+ * For compressed textures, this is the byte stride between one row of
+ * blocks and the next row of blocks.
+ *
+ * Only valid while one of the ImageSlices is mapped, and must be the same
+ * between all slices.
+ */
+ GLint RowStride;
+ /**
+ * When a texture image is mapped for swrast, this array contains pointers
+ * to the beginning of each slice.
+ *
+ * For swrast-allocated textures, these pointers will always stay
+ * initialized to point within Buffer.
+ */
+ void **ImageSlices;