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authorBrian <brian.paul@tungstengraphics.com>2007-06-25 09:43:02 -0600
committerBrian <brian.paul@tungstengraphics.com>2007-06-25 09:43:02 -0600
commit8f6d06d037524f012416da5b56889e74bcf09f8f (patch)
tree26e6d6a63fa5b53f0845aa8b470d0a5de902d344 /src/mesa
parent05b2297befccb67acc30bd74f8d7586fc88014d1 (diff)
code for functional Z buffer surface
Diffstat (limited to 'src/mesa')
-rw-r--r--src/mesa/drivers/x11/xm_surface.c77
-rw-r--r--src/mesa/drivers/x11/xmesaP.h4
-rw-r--r--src/mesa/state_tracker/st_atom_framebuffer.c10
3 files changed, 81 insertions, 10 deletions
diff --git a/src/mesa/drivers/x11/xm_surface.c b/src/mesa/drivers/x11/xm_surface.c
index a937df3ade..30c9049cbf 100644
--- a/src/mesa/drivers/x11/xm_surface.c
+++ b/src/mesa/drivers/x11/xm_surface.c
@@ -54,6 +54,7 @@ struct xmesa_surface
{
struct softpipe_surface sps;
struct xmesa_renderbuffer *xrb; /** ptr back to matching xmesa_renderbuffer */
+ struct gl_renderbuffer *rb; /* ptr to matching gl_renderbuffer */
};
@@ -242,15 +243,85 @@ xmesa_get_color_surface(GLcontext *ctx, GLuint buf)
}
+static void
+read_quad_z(struct softpipe_surface *sps,
+ GLint x, GLint y, GLfloat zzzz[QUAD_SIZE])
+{
+ struct xmesa_surface *xmsurf = xmesa_surface(sps);
+ struct gl_renderbuffer *rb = xmsurf->rb;
+ GLushort temp[4];
+ GLuint i;
+ GET_CURRENT_CONTEXT(ctx);
+ rb->GetRow(ctx, rb, 2, x, y, temp);
+ rb->GetRow(ctx, rb, 2, x, y + 1, temp + 2);
+ for (i = 0; i < 4; i++) {
+ zzzz[i] = USHORT_TO_FLOAT(temp[i]);
+ }
+}
+
+static void
+write_quad_z(struct softpipe_surface *sps,
+ GLint x, GLint y, const GLfloat zzzz[QUAD_SIZE])
+{
+ struct xmesa_surface *xmsurf = xmesa_surface(sps);
+ struct gl_renderbuffer *rb = xmsurf->rb;
+ GLushort temp[4];
+ GLuint i;
+ GET_CURRENT_CONTEXT(ctx);
+ for (i = 0; i < 4; i++) {
+ CLAMPED_FLOAT_TO_USHORT(temp[i], zzzz[i]);
+ }
+ rb->PutRow(ctx, rb, 2, x, y, temp, NULL);
+ rb->PutRow(ctx, rb, 2, x, y + 1, temp + 2, NULL);
+}
+
+
+static struct xmesa_surface *
+create_z_surface(XMesaContext xmctx, struct gl_renderbuffer *rb)
+{
+ struct xmesa_surface *xmsurf;
+
+ xmsurf = CALLOC_STRUCT(xmesa_surface);
+ if (xmsurf) {
+ xmsurf->sps.surface.width = rb->Width;
+ xmsurf->sps.surface.height = rb->Height;
+ xmsurf->sps.read_quad_z = read_quad_z;
+ xmsurf->sps.write_quad_z = write_quad_z;
+ xmsurf->rb = rb;
+ }
+ return xmsurf;
+}
+
+/**
+ * Return a pipe_surface that wraps the current Z/depth buffer.
+ * XXX this is pretty much a total hack until gl_renderbuffers and
+ * pipe_surfaces are merged...
+ */
struct pipe_surface *
-xmesa_get_z_surface(GLcontext *ctx, GLuint i)
+xmesa_get_z_surface(GLcontext *ctx)
{
- return NULL;
+ XMesaContext xmctx = XMESA_CONTEXT(ctx);
+ struct gl_renderbuffer *rb = ctx->DrawBuffer->_DepthBuffer;
+ static struct xmesa_surface *xms = NULL;
+
+ if (!rb)
+ return NULL;
+
+ if (!xms) {
+ xms = create_z_surface(xmctx, rb);
+ }
+ else if (xms->sps.surface.width != rb->Width ||
+ xms->sps.surface.height != rb->Height) {
+ free_surface(&xms->sps);
+ xms = create_z_surface(xmctx, rb);
+ }
+
+ return (struct pipe_surface *) &xms->sps.surface;
}
struct pipe_surface *
-xmesa_get_stencil_surface(GLcontext *ctx, GLuint i)
+xmesa_get_stencil_surface(GLcontext *ctx)
{
return NULL;
}
diff --git a/src/mesa/drivers/x11/xmesaP.h b/src/mesa/drivers/x11/xmesaP.h
index 1d5df3d935..c0eed4c2a3 100644
--- a/src/mesa/drivers/x11/xmesaP.h
+++ b/src/mesa/drivers/x11/xmesaP.h
@@ -593,10 +593,10 @@ struct pipe_surface *
xmesa_get_color_surface(GLcontext *ctx, GLuint buf);
struct pipe_surface *
-xmesa_get_z_surface(GLcontext *ctx, GLuint i);
+xmesa_get_z_surface(GLcontext *ctx);
struct pipe_surface *
-xmesa_get_stencil_surface(GLcontext *ctx, GLuint i);
+xmesa_get_stencil_surface(GLcontext *ctx);
#endif
diff --git a/src/mesa/state_tracker/st_atom_framebuffer.c b/src/mesa/state_tracker/st_atom_framebuffer.c
index 8e98cbc2df..595f390b28 100644
--- a/src/mesa/state_tracker/st_atom_framebuffer.c
+++ b/src/mesa/state_tracker/st_atom_framebuffer.c
@@ -40,10 +40,10 @@ extern struct pipe_surface *
xmesa_get_color_surface(GLcontext *ctx, GLuint i);
extern struct pipe_surface *
-xmesa_get_z_surface(GLcontext *ctx, GLuint i);
+xmesa_get_z_surface(GLcontext *ctx);
extern struct pipe_surface *
-xmesa_get_stencil_surface(GLcontext *ctx, GLuint i);
+xmesa_get_stencil_surface(GLcontext *ctx);
/**
@@ -64,12 +64,12 @@ update_framebuffer_state( struct st_context *st )
framebuffer.cbufs[i] = xmesa_get_color_surface(st->ctx, i);
}
- if (st->ctx->DrawBuffer->Attachment[BUFFER_DEPTH].Renderbuffer) {
- framebuffer.zbuf = xmesa_get_z_surface(st->ctx, i);
+ if (st->ctx->DrawBuffer->_DepthBuffer/*Attachment[BUFFER_DEPTH].Renderbuffer*/) {
+ framebuffer.zbuf = xmesa_get_z_surface(st->ctx);
}
if (st->ctx->DrawBuffer->Attachment[BUFFER_STENCIL].Renderbuffer) {
- framebuffer.sbuf = xmesa_get_stencil_surface(st->ctx, i);
+ framebuffer.sbuf = xmesa_get_stencil_surface(st->ctx);
}
if (memcmp(&framebuffer, &st->state.framebuffer, sizeof(framebuffer)) != 0) {