diff options
| author | Marek Olšák <marek.olsak@amd.com> | 2013-12-27 19:10:03 +0100 |
|---|---|---|
| committer | Marek Olšák <marek.olsak@amd.com> | 2014-01-13 15:25:31 +0100 |
| commit | 355686a69fd10c220afcee3656c5dfb2bc644608 (patch) | |
| tree | 5632bb23f98b0dbf6634aacb325332bd6cc39dd9 /src | |
| parent | 9ea3f88c0acc547bbff39d489abda99bc71f376f (diff) | |
st/mesa: check depth and stencil writemask before clearing
Diffstat (limited to 'src')
| -rw-r--r-- | src/mesa/state_tracker/st_cb_clear.c | 17 |
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; |