498 lines
12 KiB
C
498 lines
12 KiB
C
/*
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* Copyright © 2007, 2008 Red Hat, Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Soft-
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* ware"), to deal in the Software without restriction, including without
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* limitation the rights to use, copy, modify, merge, publish, distribute,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, provided that the above copyright
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* notice(s) and this permission notice appear in all copies of the Soft-
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* ware and that both the above copyright notice(s) and this permission
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* notice appear in supporting documentation.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABIL-
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* ITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY
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* RIGHTS. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR HOLDERS INCLUDED IN
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* THIS NOTICE BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL INDIRECT OR CONSE-
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* QUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
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* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
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* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFOR-
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* MANCE OF THIS SOFTWARE.
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*
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* Except as contained in this notice, the name of a copyright holder shall
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* not be used in advertising or otherwise to promote the sale, use or
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* other dealings in this Software without prior written authorization of
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* the copyright holder.
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*
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* Authors:
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* Kristian Høgsberg (krh@redhat.com)
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*/
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#ifdef HAVE_XORG_CONFIG_H
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#include <xorg-config.h>
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#endif
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#include <xf86drm.h>
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#include "xf86Module.h"
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#include "scrnintstr.h"
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#include "windowstr.h"
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#include "dri2.h"
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#include "xf86VGAarbiter.h"
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#include "xf86.h"
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static int dri2ScreenPrivateKeyIndex;
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static DevPrivateKey dri2ScreenPrivateKey = &dri2ScreenPrivateKeyIndex;
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static int dri2WindowPrivateKeyIndex;
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static DevPrivateKey dri2WindowPrivateKey = &dri2WindowPrivateKeyIndex;
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static int dri2PixmapPrivateKeyIndex;
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static DevPrivateKey dri2PixmapPrivateKey = &dri2PixmapPrivateKeyIndex;
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typedef struct _DRI2Drawable {
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unsigned int refCount;
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int width;
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int height;
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DRI2BufferPtr *buffers;
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int bufferCount;
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unsigned int pendingSequence;
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} DRI2DrawableRec, *DRI2DrawablePtr;
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typedef struct _DRI2Screen {
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const char *driverName;
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const char *deviceName;
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int fd;
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unsigned int lastSequence;
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DRI2CreateBufferProcPtr CreateBuffer;
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DRI2DestroyBufferProcPtr DestroyBuffer;
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DRI2CopyRegionProcPtr CopyRegion;
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HandleExposuresProcPtr HandleExposures;
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} DRI2ScreenRec, *DRI2ScreenPtr;
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static DRI2ScreenPtr
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DRI2GetScreen(ScreenPtr pScreen)
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{
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return dixLookupPrivate(&pScreen->devPrivates, dri2ScreenPrivateKey);
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}
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static DRI2DrawablePtr
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DRI2GetDrawable(DrawablePtr pDraw)
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{
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WindowPtr pWin;
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PixmapPtr pPixmap;
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if (pDraw->type == DRAWABLE_WINDOW)
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{
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pWin = (WindowPtr) pDraw;
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return dixLookupPrivate(&pWin->devPrivates, dri2WindowPrivateKey);
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}
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else
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{
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pPixmap = (PixmapPtr) pDraw;
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return dixLookupPrivate(&pPixmap->devPrivates, dri2PixmapPrivateKey);
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}
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}
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int
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DRI2CreateDrawable(DrawablePtr pDraw)
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{
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WindowPtr pWin;
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PixmapPtr pPixmap;
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DRI2DrawablePtr pPriv;
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pPriv = DRI2GetDrawable(pDraw);
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if (pPriv != NULL)
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{
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pPriv->refCount++;
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return Success;
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}
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pPriv = xalloc(sizeof *pPriv);
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if (pPriv == NULL)
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return BadAlloc;
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pPriv->refCount = 1;
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pPriv->width = pDraw->width;
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pPriv->height = pDraw->height;
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pPriv->buffers = NULL;
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pPriv->bufferCount = 0;
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if (pDraw->type == DRAWABLE_WINDOW)
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{
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pWin = (WindowPtr) pDraw;
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dixSetPrivate(&pWin->devPrivates, dri2WindowPrivateKey, pPriv);
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}
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else
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{
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pPixmap = (PixmapPtr) pDraw;
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dixSetPrivate(&pPixmap->devPrivates, dri2PixmapPrivateKey, pPriv);
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}
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return Success;
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}
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static int
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find_attachment(DRI2DrawablePtr pPriv, unsigned attachment)
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{
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int i;
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if (pPriv->buffers == NULL) {
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return -1;
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}
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for (i = 0; i < pPriv->bufferCount; i++) {
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if ((pPriv->buffers[i] != NULL)
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&& (pPriv->buffers[i]->attachment == attachment)) {
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return i;
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}
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}
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return -1;
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}
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static DRI2BufferPtr
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allocate_or_reuse_buffer(DrawablePtr pDraw, DRI2ScreenPtr ds,
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DRI2DrawablePtr pPriv,
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unsigned int attachment, unsigned int format,
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int dimensions_match)
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{
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DRI2BufferPtr buffer;
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int old_buf;
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old_buf = find_attachment(pPriv, attachment);
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if ((old_buf < 0)
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|| !dimensions_match
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|| (pPriv->buffers[old_buf]->format != format)) {
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buffer = (*ds->CreateBuffer)(pDraw, attachment, format);
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} else {
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buffer = pPriv->buffers[old_buf];
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pPriv->buffers[old_buf] = NULL;
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}
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return buffer;
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}
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static DRI2BufferPtr *
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do_get_buffers(DrawablePtr pDraw, int *width, int *height,
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unsigned int *attachments, int count, int *out_count,
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int has_format)
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{
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DRI2ScreenPtr ds = DRI2GetScreen(pDraw->pScreen);
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DRI2DrawablePtr pPriv = DRI2GetDrawable(pDraw);
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DRI2BufferPtr *buffers;
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int need_real_front = 0;
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int need_fake_front = 0;
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int have_fake_front = 0;
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int front_format = 0;
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int dimensions_match;
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int i;
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if (!pPriv) {
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*width = pDraw->width;
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*height = pDraw->height;
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*out_count = 0;
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return NULL;
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}
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dimensions_match = (pDraw->width == pPriv->width)
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&& (pDraw->height == pPriv->height);
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buffers = xalloc((count + 1) * sizeof(buffers[0]));
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for (i = 0; i < count; i++) {
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const unsigned attachment = *(attachments++);
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const unsigned format = (has_format) ? *(attachments++) : 0;
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buffers[i] = allocate_or_reuse_buffer(pDraw, ds, pPriv, attachment,
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format, dimensions_match);
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/* If the drawable is a window and the front-buffer is requested,
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* silently add the fake front-buffer to the list of requested
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* attachments. The counting logic in the loop accounts for the case
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* where the client requests both the fake and real front-buffer.
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*/
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if (attachment == DRI2BufferBackLeft) {
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need_real_front++;
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front_format = format;
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}
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if (attachment == DRI2BufferFrontLeft) {
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need_real_front--;
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front_format = format;
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if (pDraw->type == DRAWABLE_WINDOW) {
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need_fake_front++;
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}
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}
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if (pDraw->type == DRAWABLE_WINDOW) {
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if (attachment == DRI2BufferFakeFrontLeft) {
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need_fake_front--;
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have_fake_front = 1;
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}
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}
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}
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if (need_real_front > 0) {
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buffers[i++] = allocate_or_reuse_buffer(pDraw, ds, pPriv,
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DRI2BufferFrontLeft,
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front_format, dimensions_match);
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}
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if (need_fake_front > 0) {
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buffers[i++] = allocate_or_reuse_buffer(pDraw, ds, pPriv,
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DRI2BufferFakeFrontLeft,
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front_format, dimensions_match);
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have_fake_front = 1;
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}
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*out_count = i;
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if (pPriv->buffers != NULL) {
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for (i = 0; i < pPriv->bufferCount; i++) {
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if (pPriv->buffers[i] != NULL) {
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(*ds->DestroyBuffer)(pDraw, pPriv->buffers[i]);
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}
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}
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xfree(pPriv->buffers);
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}
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pPriv->buffers = buffers;
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pPriv->bufferCount = *out_count;
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pPriv->width = pDraw->width;
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pPriv->height = pDraw->height;
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*width = pPriv->width;
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*height = pPriv->height;
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/* If the client is getting a fake front-buffer, pre-fill it with the
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* contents of the real front-buffer. This ensures correct operation of
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* applications that call glXWaitX before calling glDrawBuffer.
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*/
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if (have_fake_front) {
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BoxRec box;
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RegionRec region;
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box.x1 = 0;
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box.y1 = 0;
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box.x2 = pPriv->width;
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box.y2 = pPriv->height;
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REGION_INIT(pDraw->pScreen, ®ion, &box, 0);
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DRI2CopyRegion(pDraw, ®ion, DRI2BufferFakeFrontLeft,
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DRI2BufferFrontLeft);
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}
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return pPriv->buffers;
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}
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DRI2BufferPtr *
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DRI2GetBuffers(DrawablePtr pDraw, int *width, int *height,
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unsigned int *attachments, int count, int *out_count)
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{
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return do_get_buffers(pDraw, width, height, attachments, count,
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out_count, FALSE);
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}
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DRI2BufferPtr *
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DRI2GetBuffersWithFormat(DrawablePtr pDraw, int *width, int *height,
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unsigned int *attachments, int count, int *out_count)
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{
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return do_get_buffers(pDraw, width, height, attachments, count,
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out_count, TRUE);
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}
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int
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DRI2CopyRegion(DrawablePtr pDraw, RegionPtr pRegion,
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unsigned int dest, unsigned int src)
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{
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DRI2ScreenPtr ds = DRI2GetScreen(pDraw->pScreen);
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DRI2DrawablePtr pPriv;
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DRI2BufferPtr pDestBuffer, pSrcBuffer;
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int i;
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pPriv = DRI2GetDrawable(pDraw);
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if (pPriv == NULL)
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return BadDrawable;
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pDestBuffer = NULL;
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pSrcBuffer = NULL;
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for (i = 0; i < pPriv->bufferCount; i++)
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{
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if (pPriv->buffers[i]->attachment == dest)
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pDestBuffer = (DRI2BufferPtr) pPriv->buffers[i];
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if (pPriv->buffers[i]->attachment == src)
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pSrcBuffer = (DRI2BufferPtr) pPriv->buffers[i];
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}
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if (pSrcBuffer == NULL || pDestBuffer == NULL)
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return BadValue;
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(*ds->CopyRegion)(pDraw, pRegion, pDestBuffer, pSrcBuffer);
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return Success;
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}
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void
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DRI2DestroyDrawable(DrawablePtr pDraw)
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{
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DRI2ScreenPtr ds = DRI2GetScreen(pDraw->pScreen);
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DRI2DrawablePtr pPriv;
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WindowPtr pWin;
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PixmapPtr pPixmap;
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pPriv = DRI2GetDrawable(pDraw);
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if (pPriv == NULL)
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return;
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pPriv->refCount--;
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if (pPriv->refCount > 0)
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return;
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if (pPriv->buffers != NULL) {
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int i;
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for (i = 0; i < pPriv->bufferCount; i++)
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(*ds->DestroyBuffer)(pDraw, pPriv->buffers[i]);
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xfree(pPriv->buffers);
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}
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xfree(pPriv);
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if (pDraw->type == DRAWABLE_WINDOW)
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{
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pWin = (WindowPtr) pDraw;
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dixSetPrivate(&pWin->devPrivates, dri2WindowPrivateKey, NULL);
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}
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else
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{
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pPixmap = (PixmapPtr) pDraw;
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dixSetPrivate(&pPixmap->devPrivates, dri2PixmapPrivateKey, NULL);
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}
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}
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Bool
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DRI2Connect(ScreenPtr pScreen, unsigned int driverType, int *fd,
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const char **driverName, const char **deviceName)
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{
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DRI2ScreenPtr ds = DRI2GetScreen(pScreen);
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if (ds == NULL)
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return FALSE;
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if (driverType != DRI2DriverDRI)
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return BadValue;
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*fd = ds->fd;
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*driverName = ds->driverName;
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*deviceName = ds->deviceName;
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return TRUE;
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}
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Bool
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DRI2Authenticate(ScreenPtr pScreen, drm_magic_t magic)
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{
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DRI2ScreenPtr ds = DRI2GetScreen(pScreen);
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if (ds == NULL || drmAuthMagic(ds->fd, magic))
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return FALSE;
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return TRUE;
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}
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Bool
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DRI2ScreenInit(ScreenPtr pScreen, DRI2InfoPtr info)
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{
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DRI2ScreenPtr ds;
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if (info->version < 3)
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return FALSE;
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if (!xf86VGAarbiterAllowDRI(pScreen)) {
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xf86DrvMsg(pScreen->myNum, X_WARNING,
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"[DRI2] Direct rendering is not supported when VGA arb is necessary for the device\n");
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return FALSE;
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}
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ds = xalloc(sizeof *ds);
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if (!ds)
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return FALSE;
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ds->fd = info->fd;
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ds->driverName = info->driverName;
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ds->deviceName = info->deviceName;
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ds->CreateBuffer = info->CreateBuffer;
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ds->DestroyBuffer = info->DestroyBuffer;
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ds->CopyRegion = info->CopyRegion;
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dixSetPrivate(&pScreen->devPrivates, dri2ScreenPrivateKey, ds);
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xf86DrvMsg(pScreen->myNum, X_INFO, "[DRI2] Setup complete\n");
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return TRUE;
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}
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void
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DRI2CloseScreen(ScreenPtr pScreen)
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{
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DRI2ScreenPtr ds = DRI2GetScreen(pScreen);
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xfree(ds);
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dixSetPrivate(&pScreen->devPrivates, dri2ScreenPrivateKey, NULL);
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}
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extern ExtensionModule dri2ExtensionModule;
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static pointer
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DRI2Setup(pointer module, pointer opts, int *errmaj, int *errmin)
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{
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static Bool setupDone = FALSE;
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if (!setupDone)
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{
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setupDone = TRUE;
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LoadExtension(&dri2ExtensionModule, FALSE);
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}
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else
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{
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if (errmaj)
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*errmaj = LDR_ONCEONLY;
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}
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return (pointer) 1;
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}
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static XF86ModuleVersionInfo DRI2VersRec =
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{
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"dri2",
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MODULEVENDORSTRING,
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MODINFOSTRING1,
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MODINFOSTRING2,
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XORG_VERSION_CURRENT,
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1, 1, 0,
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ABI_CLASS_EXTENSION,
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ABI_EXTENSION_VERSION,
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MOD_CLASS_NONE,
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{ 0, 0, 0, 0 }
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};
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_X_EXPORT XF86ModuleData dri2ModuleData = { &DRI2VersRec, DRI2Setup, NULL };
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void
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DRI2Version(int *major, int *minor)
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{
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if (major != NULL)
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*major = DRI2VersRec.majorversion;
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if (minor != NULL)
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*minor = DRI2VersRec.minorversion;
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}
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