st/xorg: Handle fake fronts correctly for pixmaps
[mesa.git] / src / gallium / state_trackers / xorg / xorg_dri2.c
index 401bd39dac00e50bacb61519be76f2e6c2466a9d..f089965b03c8c061d956b73735f45e5f5fdbb615 100644 (file)
 #include "pipe/p_state.h"
 #include "pipe/p_inlines.h"
 
+#include "util/u_rect.h"
+
 typedef struct {
     PixmapPtr pPixmap;
     struct pipe_texture *tex;
     struct pipe_buffer *buf;
+    struct pipe_fence_handle *fence;
 } *BufferPrivatePtr;
 
 static DRI2BufferPtr
@@ -83,7 +86,6 @@ driCreateBuffers(DrawablePtr pDraw, unsigned int *attachments, int count)
            pipe_texture_reference(&tex, depth);
        } else if (attachments[i] == DRI2BufferDepth) {
            struct pipe_texture template;
-
            memset(&template, 0, sizeof(template));
            template.target = PIPE_TEXTURE_2D;
            template.format = PIPE_FORMAT_S8Z24_UNORM;
@@ -92,24 +94,27 @@ driCreateBuffers(DrawablePtr pDraw, unsigned int *attachments, int count)
            template.height[0] = pDraw->height;
            template.depth[0] = 1;
            template.last_level = 0;
-           template.tex_usage = PIPE_TEXTURE_USAGE_RENDER_TARGET;
+           template.tex_usage = PIPE_TEXTURE_USAGE_DEPTH_STENCIL;
            tex = ms->screen->texture_create(ms->screen, &template);
+           depth = tex;
+       } else if (attachments[i] == DRI2BufferFakeFrontLeft &&
+                  pDraw->type == DRAWABLE_PIXMAP) {
+           pPixmap = (PixmapPtr) pDraw;
+           pPixmap->refcnt++;
+           tex = xorg_exa_get_texture(pPixmap);
        } else {
-           struct pipe_texture template;
-           memset(&template, 0, sizeof(template));
-           template.target = PIPE_TEXTURE_2D;
-           template.format = PIPE_FORMAT_A8R8G8B8_UNORM;
-           pf_get_block(template.format, &template.block);
-           template.width[0] = pDraw->width;
-           template.height[0] = pDraw->height;
-           template.depth[0] = 1;
-           template.last_level = 0;
-           template.tex_usage = PIPE_TEXTURE_USAGE_RENDER_TARGET;
-           tex = ms->screen->texture_create(ms->screen, &template);
+           pPixmap = (*pScreen->CreatePixmap)(pScreen, pDraw->width,
+                                              pDraw->height,
+                                              pDraw->depth,
+                                              0);
+           tex = xorg_exa_get_texture(pPixmap);
        }
 
-       drm_api_hooks.buffer_from_texture(tex, &buf, &stride);
-       drm_api_hooks.global_handle_from_buffer(ms->screen, buf, &handle);
+       if (!tex)
+               FatalError("NO TEXTURE IN DRI2\n");
+
+       ms->api->buffer_from_texture(ms->api, tex, &buf, &stride);
+       ms->api->global_handle_from_buffer(ms->api, ms->screen, buf, &handle);
 
        buffers[i].name = handle;
        buffers[i].attachment = attachments[i];
@@ -138,15 +143,17 @@ driDestroyBuffers(DrawablePtr pDraw, DRI2BufferPtr buffers, int count)
     modesettingPtr ms = modesettingPTR(pScrn);
     BufferPrivatePtr private;
     int i;
+    (void)ms;
 
     for (i = 0; i < count; i++) {
        private = buffers[i].driverPrivate;
 
-       if (private->pPixmap)
-           (*pScreen->DestroyPixmap)(private->pPixmap);
-
        pipe_texture_reference(&private->tex, NULL);
        pipe_buffer_reference(&private->buf, NULL);
+        ms->screen->fence_reference(ms->screen, &private->fence, NULL);
+
+       if (private->pPixmap)
+           (*pScreen->DestroyPixmap)(private->pPixmap);
     }
 
     if (buffers) {
@@ -164,19 +171,83 @@ driCopyRegion(DrawablePtr pDraw, RegionPtr pRegion,
     modesettingPtr ms = modesettingPTR(pScrn);
     BufferPrivatePtr dst_priv = pDestBuffer->driverPrivate;
     BufferPrivatePtr src_priv = pSrcBuffer->driverPrivate;
+    PixmapPtr src_pixmap;
+    PixmapPtr dst_pixmap;
+    GCPtr gc;
+    RegionPtr copy_clip;
+
+    /*
+     * In driCreateBuffers we dewrap windows into the
+     * backing pixmaps in order to get to the texture.
+     * We need to use the real drawable in CopyArea
+     * so that cliprects and offsets are correct.
+     */
+    src_pixmap = src_priv->pPixmap;
+    dst_pixmap = dst_priv->pPixmap;
+    if (pSrcBuffer->attachment == DRI2BufferFrontLeft)
+       src_pixmap = (PixmapPtr)pDraw;
+    if (pDestBuffer->attachment == DRI2BufferFrontLeft)
+       dst_pixmap = (PixmapPtr)pDraw;
+
+    /*
+     * The clients implements glXWaitX with a copy front to fake and then
+     * waiting on the server to signal its completion of it. While
+     * glXWaitGL is a client side flush and a copy from fake to front.
+     * This is how it is done in the DRI2 protocol, how ever depending
+     * which type of drawables the server does things a bit differently
+     * then what the protocol says as the fake and front are the same.
+     *
+     * for pixmaps glXWaitX is a server flush.
+     * for pixmaps glXWaitGL is a client flush.
+     * for windows glXWaitX is a copy from front to fake then a server flush.
+     * for windows glXWaitGL is a client flush then a copy from fake to front.
+     *
+     * XXX in the windows case this code always flushes but that isn't a
+     * must in the glXWaitGL case but we don't know if this is a glXWaitGL
+     * or a glFlush/glFinish call.
+     */
+    if (dst_pixmap == src_pixmap) {
+       /* pixmap glXWaitX */
+       if (pSrcBuffer->attachment == DRI2BufferFrontLeft &&
+           pDestBuffer->attachment == DRI2BufferFakeFrontLeft) {
+           ms->ctx->flush(ms->ctx, PIPE_FLUSH_SWAPBUFFERS, NULL);
+           return;
+       }
+       /* pixmap glXWaitGL */
+       if (pDestBuffer->attachment == DRI2BufferFrontLeft &&
+           pSrcBuffer->attachment == DRI2BufferFakeFrontLeft) {
+           return;
+       } else {
+           xf86DrvMsg(pScrn->scrnIndex, X_WARNING,
+               "copying between the same pixmap\n");
+       }
+    }
+
+    gc = GetScratchGC(pDraw->depth, pScreen);
+    copy_clip = REGION_CREATE(pScreen, NULL, 0);
+    REGION_COPY(pScreen, copy_clip, pRegion);
+    (*gc->funcs->ChangeClip) (gc, CT_REGION, copy_clip, 0);
+    ValidateGC(&dst_pixmap->drawable, gc);
+
+    /* If this is a full buffer swap, throttle on the previous one */
+    if (dst_priv->fence && REGION_NUM_RECTS(pRegion) == 1) {
+       BoxPtr extents = REGION_EXTENTS(pScreen, pRegion);
+
+       if (extents->x1 == 0 && extents->y1 == 0 &&
+           extents->x2 == pDraw->width && extents->y2 == pDraw->height) {
+           ms->screen->fence_finish(ms->screen, dst_priv->fence, 0);
+           ms->screen->fence_reference(ms->screen, &dst_priv->fence, NULL);
+       }
+    }
 
-    struct pipe_surface *dst_surf =
-       ms->screen->get_tex_surface(ms->screen, dst_priv->tex, 0, 0, 0,
-                                   PIPE_BUFFER_USAGE_GPU_WRITE);
-    struct pipe_surface *src_surf =
-       ms->screen->get_tex_surface(ms->screen, src_priv->tex, 0, 0, 0,
-                                   PIPE_BUFFER_USAGE_GPU_READ);
+    (*gc->ops->CopyArea)(&src_pixmap->drawable, &dst_pixmap->drawable, gc,
+                        0, 0, pDraw->width, pDraw->height, 0, 0);
 
-    ms->ctx->surface_copy(ms->ctx, dst_surf, 0, 0, src_surf,
-                         0, 0, pDraw->width, pDraw->height);
+    FreeScratchGC(gc);
 
-    pipe_surface_reference(&dst_surf, NULL);
-    pipe_surface_reference(&src_surf, NULL);
+    ms->ctx->flush(ms->ctx, PIPE_FLUSH_SWAPBUFFERS,
+                  pDestBuffer->attachment == DRI2BufferFrontLeft ?
+                  &dst_priv->fence : NULL);
 }
 
 Bool