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authorBrian Paul <brianp@vmware.com>2009-08-05 13:46:47 -0600
committerBrian Paul <brianp@vmware.com>2009-08-05 13:46:47 -0600
commita59579c983df651373435791f8f4fd249293b344 (patch)
tree299e15ce205fff5e23a536a979b6e6229e110727 /src/mesa/state_tracker
parentdcebe220f430221821a10944fbdb639a9252bfef (diff)
st/mesa: implement BlitFramebuffer() for depth/stencil (incomplete)
We now handle the case of blitting Z+stencil to/from combined Z/stencil surfaces. But Z-only or stencil-only and separate depth/stencil surfaces are not yet implemented.
Diffstat (limited to 'src/mesa/state_tracker')
-rw-r--r--src/mesa/state_tracker/st_cb_blit.c109
1 files changed, 80 insertions, 29 deletions
diff --git a/src/mesa/state_tracker/st_cb_blit.c b/src/mesa/state_tracker/st_cb_blit.c
index 98610473b3..c741940bcf 100644
--- a/src/mesa/state_tracker/st_cb_blit.c
+++ b/src/mesa/state_tracker/st_cb_blit.c
@@ -69,56 +69,107 @@ st_BlitFramebuffer(GLcontext *ctx,
GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1,
GLbitfield mask, GLenum filter)
{
+ const GLbitfield depthStencil = (GL_DEPTH_BUFFER_BIT |
+ GL_STENCIL_BUFFER_BIT);
struct st_context *st = ctx->st;
-
const uint pFilter = ((filter == GL_NEAREST)
? PIPE_TEX_MIPFILTER_NEAREST
: PIPE_TEX_MIPFILTER_LINEAR);
+ struct gl_framebuffer *readFB = ctx->ReadBuffer;
+ struct gl_framebuffer *drawFB = ctx->DrawBuffer;
if (!_mesa_clip_blit(ctx, &srcX0, &srcY0, &srcX1, &srcY1,
&dstX0, &dstY0, &dstX1, &dstY1)) {
return; /* nothing to draw/blit */
}
+ if (st_fb_orientation(drawFB) == Y_0_TOP) {
+ /* invert Y for dest */
+ dstY0 = drawFB->Height - dstY0;
+ dstY1 = drawFB->Height - dstY1;
+ }
+
+ if (st_fb_orientation(readFB) == Y_0_TOP) {
+ /* invert Y for src */
+ srcY0 = readFB->Height - srcY0;
+ srcY1 = readFB->Height - srcY1;
+ }
+
+ if (srcY0 > srcY1 && dstY0 > dstY1) {
+ /* Both src and dst are upside down. Swap Y to make it
+ * right-side up to increase odds of using a fast path.
+ * Recall that all Gallium raster coords have Y=0=top.
+ */
+ GLint tmp;
+ tmp = srcY0;
+ srcY0 = srcY1;
+ srcY1 = tmp;
+ tmp = dstY0;
+ dstY0 = dstY1;
+ dstY1 = tmp;
+ }
+
if (mask & GL_COLOR_BUFFER_BIT) {
struct st_renderbuffer *srcRb =
- st_renderbuffer(ctx->ReadBuffer->_ColorReadBuffer);
+ st_renderbuffer(readFB->_ColorReadBuffer);
struct st_renderbuffer *dstRb =
- st_renderbuffer(ctx->DrawBuffer->_ColorDrawBuffers[0]);
+ st_renderbuffer(drawFB->_ColorDrawBuffers[0]);
struct pipe_surface *srcSurf = srcRb->surface;
struct pipe_surface *dstSurf = dstRb->surface;
- if (st_fb_orientation(ctx->DrawBuffer) == Y_0_TOP) {
- /* invert Y for dest */
- dstY0 = dstRb->Base.Height - dstY0;
- dstY1 = dstRb->Base.Height - dstY1;
- }
-
- if (st_fb_orientation(ctx->ReadBuffer) == Y_0_TOP) {
- /* invert Y for src */
- srcY0 = srcRb->Base.Height - srcY0;
- srcY1 = srcRb->Base.Height - srcY1;
- }
-
- if (srcY0 > srcY1 && dstY0 > dstY1) {
- /* Both src and dst are upside down. Swap Y to make it
- * right-side up to increase odds of using a fast path.
- * Recall that all Gallium raster coords have Y=0=top.
- */
- GLint tmp;
- tmp = srcY0;
- srcY0 = srcY1;
- srcY1 = tmp;
- tmp = dstY0;
- dstY0 = dstY1;
- dstY1 = tmp;
- }
-
util_blit_pixels(st->blit,
srcSurf, srcX0, srcY0, srcX1, srcY1,
dstSurf, dstX0, dstY0, dstX1, dstY1,
0.0, pFilter);
+ }
+ if (mask & depthStencil) {
+ /* depth and/or stencil blit */
+
+ /* get src/dst depth surfaces */
+ struct st_renderbuffer *srcDepthRb =
+ st_renderbuffer(readFB->Attachment[BUFFER_DEPTH].Renderbuffer);
+ struct st_renderbuffer *dstDepthRb =
+ st_renderbuffer(drawFB->Attachment[BUFFER_DEPTH].Renderbuffer);
+ struct pipe_surface *srcDepthSurf =
+ srcDepthRb ? srcDepthRb->surface : NULL;
+ struct pipe_surface *dstDepthSurf =
+ dstDepthRb ? dstDepthRb->surface : NULL;
+
+ /* get src/dst stencil surfaces */
+ struct st_renderbuffer *srcStencilRb =
+ st_renderbuffer(readFB->Attachment[BUFFER_STENCIL].Renderbuffer);
+ struct st_renderbuffer *dstStencilRb =
+ st_renderbuffer(drawFB->Attachment[BUFFER_STENCIL].Renderbuffer);
+ struct pipe_surface *srcStencilSurf =
+ srcStencilRb ? srcStencilRb->surface : NULL;
+ struct pipe_surface *dstStencilSurf =
+ dstStencilRb ? dstStencilRb->surface : NULL;
+
+ if ((mask & depthStencil) == depthStencil &&
+ srcDepthSurf == srcStencilSurf &&
+ dstDepthSurf == dstStencilSurf) {
+ /* Blitting depth and stencil values between combined
+ * depth/stencil buffers. This is the ideal case for such buffers.
+ */
+ util_blit_pixels(st->blit,
+ srcDepthSurf, srcX0, srcY0, srcX1, srcY1,
+ dstDepthSurf, dstX0, dstY0, dstX1, dstY1,
+ 0.0, pFilter);
+ }
+ else {
+ /* blitting depth and stencil separately */
+
+ if (mask & GL_DEPTH_BUFFER_BIT) {
+ /* blit Z only */
+ _mesa_problem(ctx, "st_BlitFramebuffer(DEPTH) not completed");
+ }
+
+ if (mask & GL_STENCIL_BUFFER_BIT) {
+ /* blit stencil only */
+ _mesa_problem(ctx, "st_BlitFramebuffer(STENCIL) not completed");
+ }
+ }
}
}