1 files changed, 380 insertions, 0 deletions

diff --git a/src/gallium/state_trackers/xorg/xorg_dri2.c b/src/gallium/state_trackers/xorg/xorg_dri2.c
new file mode 100644
index 0000000000..8a362596c7
--- /dev/null
+++ b/src/gallium/state_trackers/xorg/xorg_dri2.c
@@ -0,0 +1,380 @@
+/*
+ * Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sub license, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
+ * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ *
+ * Author: Alan Hourihane <alanh@tungstengraphics.com>
+ * Author: Jakob Bornecrantz <wallbraker@gmail.com>
+ *
+ */
+
+#include "xorg-server.h"
+#include "xf86.h"
+#include "xf86_OSproc.h"
+
+#include "xorg_tracker.h"
+#include "xorg_exa.h"
+
+#include "dri2.h"
+
+#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_fence_handle *fence;
+} *BufferPrivatePtr;
+
+static Bool
+driDoCreateBuffer(DrawablePtr pDraw, DRI2BufferPtr buffer, unsigned int format)
+{
+    struct pipe_texture *tex = NULL;
+    ScreenPtr pScreen = pDraw->pScreen;
+    ScrnInfoPtr pScrn = xf86Screens[pScreen->myNum];
+    modesettingPtr ms = modesettingPTR(pScrn);
+    struct exa_pixmap_priv *exa_priv;
+    BufferPrivatePtr private = buffer->driverPrivate;
+    PixmapPtr pPixmap;
+    unsigned stride, handle;
+
+    if (pDraw->type == DRAWABLE_PIXMAP)
+	pPixmap = (PixmapPtr) pDraw;
+    else
+	pPixmap = (*pScreen->GetWindowPixmap)((WindowPtr) pDraw);
+    exa_priv = exaGetPixmapDriverPrivate(pPixmap);
+
+    switch (buffer->attachment) {
+    default:
+	if (buffer->attachment != DRI2BufferFakeFrontLeft ||
+	    pDraw->type != DRAWABLE_PIXMAP) {
+	    private->pPixmap = (*pScreen->CreatePixmap)(pScreen, pDraw->width,
+							pDraw->height,
+							pDraw->depth,
+							0);
+	}
+	break;
+    case DRI2BufferFrontLeft:
+	break;
+    case DRI2BufferStencil:
+#if defined(DRI2INFOREC_VERSION) && DRI2INFOREC_VERSION > 2
+    case DRI2BufferDepthStencil:
+	if (exa_priv->depth_stencil_tex &&
+	    !pf_is_depth_stencil(exa_priv->depth_stencil_tex->format))
+	    exa_priv->depth_stencil_tex = NULL;
+        /* Fall through */
+#endif
+    case DRI2BufferDepth:
+	if (exa_priv->depth_stencil_tex)
+	    pipe_texture_reference(&tex, exa_priv->depth_stencil_tex);
+        else {
+	    struct pipe_texture template;
+	    memset(&template, 0, sizeof(template));
+	    template.target = PIPE_TEXTURE_2D;
+	    if (buffer->attachment == DRI2BufferDepth)
+		template.format = ms->ds_depth_bits_last ?
+		    PIPE_FORMAT_X8Z24_UNORM : PIPE_FORMAT_Z24X8_UNORM;
+	    else
+		template.format = ms->ds_depth_bits_last ?
+		    PIPE_FORMAT_S8Z24_UNORM : PIPE_FORMAT_Z24S8_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_DEPTH_STENCIL |
+		PIPE_TEXTURE_USAGE_DISPLAY_TARGET;
+	    tex = ms->screen->texture_create(ms->screen, &template);
+	    pipe_texture_reference(&exa_priv->depth_stencil_tex, tex);
+	}
+	break;
+    }
+
+    if (!private->pPixmap) {
+	private->pPixmap = pPixmap;
+	pPixmap->refcnt++;
+    }
+
+    if (!tex) {
+	exaMoveInPixmap(private->pPixmap);
+	xorg_exa_set_shared_usage(private->pPixmap);
+	pScreen->ModifyPixmapHeader(private->pPixmap, 0, 0, 0, 0, 0, NULL);
+	tex = xorg_exa_get_texture(private->pPixmap);
+    }
+
+    if (!tex)
+	FatalError("NO TEXTURE IN DRI2\n");
+
+    ms->api->shared_handle_from_texture(ms->api, ms->screen, tex, &stride, &handle);
+
+    buffer->name = handle;
+    buffer->pitch = stride;
+    buffer->cpp = 4;
+    buffer->driverPrivate = private;
+    buffer->flags = 0; /* not tiled */
+    private->tex = tex;
+
+    return TRUE;
+}
+
+static void
+driDoDestroyBuffer(DrawablePtr pDraw, DRI2BufferPtr buffer)
+{
+    ScreenPtr pScreen = pDraw->pScreen;
+    ScrnInfoPtr pScrn = xf86Screens[pScreen->myNum];
+    modesettingPtr ms = modesettingPTR(pScrn);
+    BufferPrivatePtr private = buffer->driverPrivate;
+    struct exa_pixmap_priv *exa_priv = exaGetPixmapDriverPrivate(private->pPixmap);
+
+    pipe_texture_reference(&private->tex, NULL);
+    ms->screen->fence_reference(ms->screen, &private->fence, NULL);
+    pipe_texture_reference(&exa_priv->depth_stencil_tex, NULL);
+    (*pScreen->DestroyPixmap)(private->pPixmap);
+}
+
+#if defined(DRI2INFOREC_VERSION) && DRI2INFOREC_VERSION > 2
+
+static DRI2BufferPtr
+driCreateBuffer(DrawablePtr pDraw, unsigned int attachment, unsigned int format)
+{
+    DRI2BufferPtr buffer;
+    BufferPrivatePtr private;
+
+    buffer = xcalloc(1, sizeof *buffer);
+    if (!buffer)
+	return NULL;
+
+    private = xcalloc(1, sizeof *private);
+    if (!private) {
+	goto fail;
+    }
+
+    buffer->attachment = attachment;
+    buffer->driverPrivate = private;
+
+    if (driDoCreateBuffer(pDraw, buffer, format))
+	return buffer;
+
+    xfree(private);
+fail:
+    xfree(buffer);
+    return NULL;
+}
+
+static void
+driDestroyBuffer(DrawablePtr pDraw, DRI2BufferPtr buffer)
+{
+    driDoDestroyBuffer(pDraw, buffer);
+
+    xfree(buffer->driverPrivate);
+    xfree(buffer);
+}
+
+#else /* DRI2INFOREC_VERSION <= 2 */
+
+static DRI2BufferPtr
+driCreateBuffers(DrawablePtr pDraw, unsigned int *attachments, int count)
+{
+    BufferPrivatePtr privates;
+    DRI2BufferPtr buffers;
+    int i;
+
+    buffers = xcalloc(count, sizeof *buffers);
+    if (!buffers)
+	goto fail_buffers;
+
+    privates = xcalloc(count, sizeof *privates);
+    if (!privates)
+	goto fail_privates;
+
+    for (i = 0; i < count; i++) {
+	buffers[i].attachment = attachments[i];
+	buffers[i].driverPrivate = &privates[i];
+
+	if (!driDoCreateBuffer(pDraw, &buffers[i], 0))
+	    goto fail;
+    }
+
+    return buffers;
+
+fail:
+    xfree(privates);
+fail_privates:
+    xfree(buffers);
+fail_buffers:
+    return NULL;
+}
+
+static void
+driDestroyBuffers(DrawablePtr pDraw, DRI2BufferPtr buffers, int count)
+{
+    int i;
+
+    for (i = 0; i < count; i++) {
+	driDoDestroyBuffer(pDraw, &buffers[i]);
+    }
+
+    if (buffers) {
+	xfree(buffers[0].driverPrivate);
+	xfree(buffers);
+    }
+}
+
+#endif /* DRI2INFOREC_VERSION */
+
+static void
+driCopyRegion(DrawablePtr pDraw, RegionPtr pRegion,
+              DRI2BufferPtr pDestBuffer, DRI2BufferPtr pSrcBuffer)
+{
+    ScreenPtr pScreen = pDraw->pScreen;
+    ScrnInfoPtr pScrn = xf86Screens[pScreen->myNum];
+    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);
+	}
+    }
+
+    (*gc->ops->CopyArea)(&src_pixmap->drawable, &dst_pixmap->drawable, gc,
+			 0, 0, pDraw->width, pDraw->height, 0, 0);
+
+    FreeScratchGC(gc);
+
+    ms->ctx->flush(ms->ctx, PIPE_FLUSH_SWAPBUFFERS,
+		   pDestBuffer->attachment == DRI2BufferFrontLeft ?
+		   &dst_priv->fence : NULL);
+}
+
+Bool
+driScreenInit(ScreenPtr pScreen)
+{
+    ScrnInfoPtr pScrn = xf86Screens[pScreen->myNum];
+    modesettingPtr ms = modesettingPTR(pScrn);
+    DRI2InfoRec dri2info;
+
+#if defined(DRI2INFOREC_VERSION)
+    dri2info.version = DRI2INFOREC_VERSION;
+#else
+    dri2info.version = 1;
+#endif
+    dri2info.fd = ms->fd;
+
+    dri2info.driverName = pScrn->driverName;
+    dri2info.deviceName = "/dev/dri/card0"; /* FIXME */
+
+#if defined(DRI2INFOREC_VERSION) && DRI2INFOREC_VERSION > 2
+    dri2info.CreateBuffer = driCreateBuffer;
+    dri2info.DestroyBuffer = driDestroyBuffer;
+#else
+    dri2info.CreateBuffers = driCreateBuffers;
+    dri2info.DestroyBuffers = driDestroyBuffers;
+#endif
+    dri2info.CopyRegion = driCopyRegion;
+    dri2info.Wait = NULL;
+
+    ms->d_depth_bits_last =
+	 ms->screen->is_format_supported(ms->screen, PIPE_FORMAT_X8Z24_UNORM,
+					 PIPE_TEXTURE_2D,
+					 PIPE_TEXTURE_USAGE_DEPTH_STENCIL, 0);
+    ms->ds_depth_bits_last =
+	 ms->screen->is_format_supported(ms->screen, PIPE_FORMAT_S8Z24_UNORM,
+					 PIPE_TEXTURE_2D,
+					 PIPE_TEXTURE_USAGE_DEPTH_STENCIL, 0);
+
+    return DRI2ScreenInit(pScreen, &dri2info);
+}
+
+void
+driCloseScreen(ScreenPtr pScreen)
+{
+    DRI2CloseScreen(pScreen);
+}
+
+/* vim: set sw=4 ts=8 sts=4: */