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st/mesa: check depth and stencil writemask before clearing

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This commit is contained in:
Marek Olšák
2013-12-27 19:10:03 +01:00
parent 9ea3f88c0a
commit 355686a69f
1 changed files with 15 additions and 2 deletions
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17
src/mesa/state_tracker/st_cb_clear.c
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@@ -398,6 +398,19 @@ 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.
*/
@@ -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;