diff options
| -rw-r--r-- | src/mesa/drivers/dri/i965/brw_wm_surface_state.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_wm_surface_state.c b/src/mesa/drivers/dri/i965/brw_wm_surface_state.c index 8ffbc0a5fd5..e48b1e1d2d1 100644 --- a/src/mesa/drivers/dri/i965/brw_wm_surface_state.c +++ b/src/mesa/drivers/dri/i965/brw_wm_surface_state.c @@ -695,6 +695,24 @@ brw_update_buffer_texture_surface(struct gl_context *ctx, bo = intel_bufferobj_buffer(brw, intel_obj, tObj->BufferOffset, size); } + /* The ARB_texture_buffer_specification says: + * + * "The number of texels in the buffer texture's texel array is given by + * + * floor(<buffer_size> / (<components> * sizeof(<base_type>)), + * + * where <buffer_size> is the size of the buffer object, in basic + * machine units and <components> and <base_type> are the element count + * and base data type for elements, as specified in Table X.1. The + * number of texels in the texel array is then clamped to the + * implementation-dependent limit MAX_TEXTURE_BUFFER_SIZE_ARB." + * + * We need to clamp the size in bytes to MAX_TEXTURE_BUFFER_SIZE * stride, + * so that when ISL divides by stride to obtain the number of texels, that + * texel count is clamped to MAX_TEXTURE_BUFFER_SIZE. + */ + size = MIN2(size, ctx->Const.MaxTextureBufferSize * (unsigned) texel_size); + if (brw_format == 0 && format != MESA_FORMAT_RGBA_FLOAT32) { _mesa_problem(NULL, "bad format %s for texture buffer\n", _mesa_get_format_name(format)); |