summaryrefslogtreecommitdiff
path: root/src/mesa/state_tracker/st_cb_clear.c
diff options
context:
space:
mode:
authorKeith Whitwell <keith@tungstengraphics.com>2008-02-14 16:53:51 +0000
committerMichel Dänzer <michel@tungstengraphics.com>2008-02-14 16:53:51 +0000
commitcf5ef20f436ac1d3efde2b7bff698decccb029e3 (patch)
treef708154d3a6131ccd75e2529c8ab269459012fcb /src/mesa/state_tracker/st_cb_clear.c
parent2e75f39bc4286cebb7330f54d7acf5b8f1d9777f (diff)
gallium: Cleanups related to clears.
Diffstat (limited to 'src/mesa/state_tracker/st_cb_clear.c')
-rw-r--r--src/mesa/state_tracker/st_cb_clear.c117
1 files changed, 85 insertions, 32 deletions
diff --git a/src/mesa/state_tracker/st_cb_clear.c b/src/mesa/state_tracker/st_cb_clear.c
index 410062e1e8..78baf772f4 100644
--- a/src/mesa/state_tracker/st_cb_clear.c
+++ b/src/mesa/state_tracker/st_cb_clear.c
@@ -272,6 +272,14 @@ clear_with_quad(GLcontext *ctx,
const GLfloat x1 = ctx->DrawBuffer->_Xmax;
const GLfloat y1 = ctx->DrawBuffer->_Ymax;
+ /*
+ printf("%s %s%s%s %f,%f %f,%f\n", __FUNCTION__,
+ color ? "color, " : "",
+ depth ? "depth, " : "",
+ stencil ? "stencil" : "",
+ x0, y0,
+ x1, y1);
+ */
/* blend state: RGBA masking */
{
@@ -389,13 +397,44 @@ clear_with_quad(GLcontext *ctx,
* Determine if we need to clear the depth buffer by drawing a quad.
*/
static INLINE GLboolean
-check_clear_color_with_quad(GLcontext *ctx)
+check_clear_color_with_quad(GLcontext *ctx, struct gl_renderbuffer *rb)
+{
+ const struct st_renderbuffer *strb = st_renderbuffer(rb);
+
+ if (strb->surface->status == PIPE_SURFACE_STATUS_UNDEFINED)
+ return FALSE;
+
+ if (ctx->Scissor.Enabled)
+ return TRUE;
+
+ if (!ctx->Color.ColorMask[0] ||
+ !ctx->Color.ColorMask[1] ||
+ !ctx->Color.ColorMask[2] ||
+ !ctx->Color.ColorMask[3])
+ return TRUE;
+
+ return FALSE;
+}
+
+
+static INLINE GLboolean
+check_clear_depth_stencil_with_quad(GLcontext *ctx, struct gl_renderbuffer *rb)
{
- return !(ctx->Color.ColorMask[0] &&
- ctx->Color.ColorMask[1] &&
- ctx->Color.ColorMask[2] &&
- ctx->Color.ColorMask[3] &&
- !ctx->Scissor.Enabled);
+ const struct st_renderbuffer *strb = st_renderbuffer(rb);
+ const GLuint stencilMax = (1 << rb->StencilBits) - 1;
+ GLboolean maskStencil
+ = (ctx->Stencil.WriteMask[0] & stencilMax) != stencilMax;
+
+ if (strb->surface->status == PIPE_SURFACE_STATUS_UNDEFINED)
+ return FALSE;
+
+ if (ctx->Scissor.Enabled)
+ return TRUE;
+
+ if (maskStencil)
+ return TRUE;
+
+ return FALSE;
}
@@ -407,10 +446,19 @@ check_clear_depth_with_quad(GLcontext *ctx, struct gl_renderbuffer *rb)
{
const struct st_renderbuffer *strb = st_renderbuffer(rb);
const GLboolean isDS = is_depth_stencil_format(strb->surface->format);
- return ctx->Scissor.Enabled
- || (isDS &&
- strb->surface->status == PIPE_SURFACE_STATUS_DEFINED &&
- ctx->DrawBuffer->Visual.stencilBits > 0);
+
+ if (strb->surface->status == PIPE_SURFACE_STATUS_UNDEFINED)
+ return FALSE;
+
+ if (ctx->Scissor.Enabled)
+ return TRUE;
+
+ if (isDS &&
+ strb->surface->status == PIPE_SURFACE_STATUS_DEFINED &&
+ ctx->DrawBuffer->Visual.stencilBits > 0)
+ return TRUE;
+
+ return FALSE;
}
@@ -425,9 +473,27 @@ check_clear_stencil_with_quad(GLcontext *ctx, struct gl_renderbuffer *rb)
const GLuint stencilMax = (1 << rb->StencilBits) - 1;
const GLboolean maskStencil
= (ctx->Stencil.WriteMask[0] & stencilMax) != stencilMax;
- return maskStencil
- || ctx->Scissor.Enabled
- || (isDS && ctx->DrawBuffer->Visual.depthBits > 0);
+
+ if (strb->surface->status == PIPE_SURFACE_STATUS_UNDEFINED)
+ return FALSE;
+
+ if (maskStencil)
+ return TRUE;
+
+ if (ctx->Scissor.Enabled)
+ return TRUE;
+
+ /* This is correct, but it is necessary to look at the depth clear
+ * value held in the surface when it comes time to issue the clear,
+ * rather than taking depth and stencil clear values from the
+ * current state.
+ */
+ if (isDS &&
+ strb->surface->status == PIPE_SURFACE_STATUS_DEFINED &&
+ ctx->DrawBuffer->Visual.depthBits > 0)
+ return TRUE;
+
+ return FALSE;
}
@@ -436,14 +502,10 @@ check_clear_stencil_with_quad(GLcontext *ctx, struct gl_renderbuffer *rb)
static void
clear_color_buffer(GLcontext *ctx, struct gl_renderbuffer *rb)
{
- struct st_renderbuffer *strb = st_renderbuffer(rb);
-
- if (ctx->Color.ColorMask[0] &&
- ctx->Color.ColorMask[1] &&
- ctx->Color.ColorMask[2] &&
- ctx->Color.ColorMask[3] &&
- !ctx->Scissor.Enabled)
+ if (!check_clear_color_with_quad( ctx, rb ))
{
+ struct st_renderbuffer *strb = st_renderbuffer(rb);
+
/* clear whole buffer w/out masking */
GLuint clearValue
= color_value(strb->surface->format, ctx->Color.ClearColor);
@@ -482,14 +544,8 @@ static void
clear_stencil_buffer(GLcontext *ctx, struct gl_renderbuffer *rb)
{
struct st_renderbuffer *strb = st_renderbuffer(rb);
- const GLboolean isDS = is_depth_stencil_format(strb->surface->format);
- const GLuint stencilMax = (1 << rb->StencilBits) - 1;
- GLboolean maskStencil
- = (ctx->Stencil.WriteMask[0] & stencilMax) != stencilMax;
- if (maskStencil ||
- ctx->Scissor.Enabled ||
- (isDS && ctx->DrawBuffer->Visual.depthBits > 0)) {
+ if (check_clear_stencil_with_quad(ctx, rb)) {
/* masking or scissoring or combined depth/stencil buffer */
clear_with_quad(ctx, GL_FALSE, GL_FALSE, GL_TRUE);
}
@@ -505,13 +561,10 @@ static void
clear_depth_stencil_buffer(GLcontext *ctx, struct gl_renderbuffer *rb)
{
struct st_renderbuffer *strb = st_renderbuffer(rb);
- const GLuint stencilMax = (1 << rb->StencilBits) - 1;
- GLboolean maskStencil
- = (ctx->Stencil.WriteMask[0] & stencilMax) != stencilMax;
assert(is_depth_stencil_format(strb->surface->format));
- if (!maskStencil && !ctx->Scissor.Enabled) {
+ if (check_clear_depth_stencil_with_quad(ctx, rb)) {
/* clear whole buffer w/out masking */
GLuint clearValue = depth_value(strb->surface->format, ctx->Depth.Clear);
@@ -520,7 +573,7 @@ clear_depth_stencil_buffer(GLcontext *ctx, struct gl_renderbuffer *rb)
clearValue |= ctx->Stencil.Clear << 24;
break;
case PIPE_FORMAT_Z24S8_UNORM:
- clearValue |= clearValue | ctx->Stencil.Clear;
+ clearValue |= ctx->Stencil.Clear;
break;
default:
assert(0);