From bb7ecb29fb6358a4c65278c2fe88936c578074cd Mon Sep 17 00:00:00 2001 From: Chad Versace Date: Thu, 20 Sep 2012 18:54:29 +0200 Subject: [PATCH] intel: Fix size of temporary etc1 buffer Fixes valgrind errors in piglit test oes_compressed_etc1_rgb8_texture-miptree: an invalid write in _mesa_store_compressed_store_texsubimage() at line 4406 and invalid reads in texcompress_etc_tmp.h:etc1_parse_block(). The calculation of the size of the temporary etc1 buffer allocated by intel_miptree_map_etc1() was incorrect. Sometimes the allocated buffer was too small, sometimes too large. This patch corrects the size to that expected by _mesa_store_compressed_store_texsubimage(). Note: This is candidate for the 9.0 branch. Reviewed-by: Eric Anholt Signed-off-by: Chad Versace --- src/mesa/drivers/dri/intel/intel_mipmap_tree.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/src/mesa/drivers/dri/intel/intel_mipmap_tree.c b/src/mesa/drivers/dri/intel/intel_mipmap_tree.c index 556a82fc7ff..cd7299e2a30 100644 --- a/src/mesa/drivers/dri/intel/intel_mipmap_tree.c +++ b/src/mesa/drivers/dri/intel/intel_mipmap_tree.c @@ -1292,9 +1292,10 @@ intel_miptree_map_etc1(struct intel_context *intel, assert(map->x == 0); assert(map->y == 0); - /* Each ETC1 block contains 4x4 pixels in 8 bytes. */ - map->stride = 2 * map->w; - map->buffer = map->ptr = malloc(map->stride * map->h); + map->stride = _mesa_format_row_stride(MESA_FORMAT_ETC1_RGB8, map->w); + map->buffer = malloc(_mesa_format_image_size(MESA_FORMAT_ETC1_RGB8, + map->w, map->h, 1)); + map->ptr = map->buffer; } static void -- 2.30.2