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-rw-r--r--src/mesa/state_tracker/st_cb_clear.c17
1 files changed, 15 insertions, 2 deletions
diff --git a/src/mesa/state_tracker/st_cb_clear.c b/src/mesa/state_tracker/st_cb_clear.c
index 363f2f74699..a84c9075f5e 100644
--- a/src/mesa/state_tracker/st_cb_clear.c
+++ b/src/mesa/state_tracker/st_cb_clear.c
@@ -399,6 +399,19 @@ is_color_masked(struct gl_context *ctx, int i)
/**
+ * Return if all of the stencil bits are masked.
+ */
+static INLINE GLboolean
+is_stencil_disabled(struct gl_context *ctx, struct gl_renderbuffer *rb)
+{
+ const GLuint stencilMax = 0xff;
+
+ assert(_mesa_get_format_bits(rb->Format, GL_STENCIL_BITS) > 0);
+ return (ctx->Stencil.WriteMask[0] & stencilMax) == 0;
+}
+
+
+/**
* Return if any of the stencil bits are masked.
*/
static INLINE GLboolean
@@ -457,7 +470,7 @@ st_Clear(struct gl_context *ctx, GLbitfield mask)
if (mask & BUFFER_BIT_DEPTH) {
struct st_renderbuffer *strb = st_renderbuffer(depthRb);
- if (strb->surface) {
+ if (strb->surface && ctx->Depth.Mask) {
if (is_scissor_enabled(ctx, depthRb))
quad_buffers |= PIPE_CLEAR_DEPTH;
else
@@ -467,7 +480,7 @@ st_Clear(struct gl_context *ctx, GLbitfield mask)
if (mask & BUFFER_BIT_STENCIL) {
struct st_renderbuffer *strb = st_renderbuffer(stencilRb);
- if (strb->surface) {
+ if (strb->surface && !is_stencil_disabled(ctx, stencilRb)) {
if (is_scissor_enabled(ctx, stencilRb) ||
is_stencil_masked(ctx, stencilRb))
quad_buffers |= PIPE_CLEAR_STENCIL;