/**
* Create Buffer.
*
* Note that 'format' is used from the client side to specify the DRI buffer
* format, which could differ from the drawable format. For example, the
* drawable could be 32b RGB, but the DRI buffer some YUV format (video) or
* perhaps lower bit depth RGB (GL). The color conversion is handled when
* blitting to front buffer, and page-flipping (overlay or flipchain) can
* only be used if the display supports.
*/
static DRI2BufferPtr
ARMSOCDRI2CreateBuffer(DrawablePtr pDraw, unsigned int attachment,
unsigned int format)
{
ScreenPtr pScreen = pDraw->pScreen;
ScrnInfoPtr pScrn = xf86ScreenToScrn(pScreen);
struct ARMSOCDRI2BufferRec *buf = calloc(1, sizeof(*buf));
struct ARMSOCRec *pARMSOC = ARMSOCPTR(pScrn);
struct armsoc_bo *bo;
DEBUG_MSG("pDraw=%p, attachment=%d, format=%08x",
pDraw, attachment, format);
if (!buf) {
ERROR_MSG("Couldn't allocate internal buffer structure");
return NULL;
}
buf->refcnt = 1;
buf->previous_canflip = canflip(pDraw);
DRIBUF(buf)->attachment = attachment;
DRIBUF(buf)->cpp = pDraw->bitsPerPixel / 8;
DRIBUF(buf)->format = format + 1; /* suppress DRI2 buffer reuse */
DRIBUF(buf)->flags = 0;
/* If it is a pixmap, just migrate to a GEM buffer */
if (pDraw->type == DRAWABLE_PIXMAP)
{
if (!(bo = MigratePixmapToGEM(pARMSOC, pDraw))) {
ErrorF("ARMSOCDRI2CreateBuffer: MigratePixmapToUMP failed\n");
free(buf);
return NULL;
}
DRIBUF(buf)->pitch = armsoc_bo_pitch(bo);
DRIBUF(buf)->name = armsoc_bo_name(bo);
buf->bo = bo;
return DRIBUF(buf);
}
/* We are not interested in anything other than back buffer requests ... */
if (attachment != DRI2BufferBackLeft || pDraw->type != DRAWABLE_WINDOW) {
/* ... and just return some dummy UMP buffer */
bo = pARMSOC->scanout;
DRIBUF(buf)->pitch = armsoc_bo_pitch(bo);
DRIBUF(buf)->name = armsoc_bo_name(bo);
buf->bo = bo;
armsoc_bo_reference(bo);
return DRIBUF(buf);
}
bo = armsoc_bo_from_drawable(pDraw);
if (bo && armsoc_bo_width(bo) == pDraw->width && armsoc_bo_height(bo) == pDraw->height && armsoc_bo_bpp(bo) == pDraw->bitsPerPixel) {
// Reuse existing
DRIBUF(buf)->pitch = armsoc_bo_pitch(bo);
DRIBUF(buf)->name = armsoc_bo_name(bo);
buf->bo = bo;
armsoc_bo_reference(bo);
return DRIBUF(buf);
}
bo = armsoc_bo_new_with_dim(pARMSOC->dev,
pDraw->width,
pDraw->height,
pDraw->depth,
pDraw->bitsPerPixel,
canflip(pDraw) ? ARMSOC_BO_SCANOUT : ARMSOC_BO_NON_SCANOUT);
if (!bo) {
ErrorF("ARMSOCDRI2CreateBuffer: BO alloc failed\n");
free(buf);
return NULL;
}
armsoc_bo_set_drawable(bo, pDraw);
DRIBUF(buf)->name = armsoc_bo_name(bo);
DRIBUF(buf)->pitch = armsoc_bo_pitch(bo);
buf->bo = bo;
if (canflip(pDraw) && attachment != DRI2BufferFrontLeft) {
/* Create an fb around this buffer. This will fail and we will
* fall back to blitting if the display controller hardware
* cannot scan out this buffer (for example, if it doesn't
* support the format or there was insufficient scanout memory
* at buffer creation time). */
int ret = armsoc_bo_add_fb(bo);
if (ret) {
WARNING_MSG(
"Falling back to blitting a flippable window");
}
}
/* Register Pixmap as having a buffer that can be accessed externally,
* so needs synchronised access */
// FIXME ARMSOCRegisterExternalAccess(pPixmap);
return DRIBUF(buf);
}
static Bool create_buffer(DrawablePtr pDraw, struct ARMSOCDRI2BufferRec *buf)
{
ScreenPtr pScreen = pDraw->pScreen;
ScrnInfoPtr pScrn = xf86ScreenToScrn(pScreen);
struct ARMSOCRec *pARMSOC = ARMSOCPTR(pScrn);
DRI2BufferPtr buffer = DRIBUF(buf);
PixmapPtr pPixmap = NULL;
struct armsoc_bo *bo;
int ret;
if (buffer->attachment == DRI2BufferFrontLeft) {
pPixmap = draw2pix(pDraw);
pPixmap->refcnt++;
} else {
pPixmap = createpix(pDraw);
}
if (!pPixmap) {
assert(buffer->attachment != DRI2BufferFrontLeft);
ERROR_MSG("Failed to create back buffer for window");
goto fail;
}
if (buffer->attachment == DRI2BufferBackLeft && pARMSOC->driNumBufs > 2) {
buf->pPixmaps = calloc(pARMSOC->driNumBufs-1,
sizeof(PixmapPtr));
buf->numPixmaps = pARMSOC->driNumBufs-1;
} else {
buf->pPixmaps = malloc(sizeof(PixmapPtr));
buf->numPixmaps = 1;
}
if (!buf->pPixmaps) {
ERROR_MSG("Failed to allocate PixmapPtr array for DRI2Buffer");
goto fail;
}
buf->pPixmaps[0] = pPixmap;
assert(buf->currentPixmap == 0);
bo = ARMSOCPixmapBo(pPixmap);
if (!bo) {
ERROR_MSG(
"Attempting to DRI2 wrap a pixmap with no DRM buffer object backing");
goto fail;
}
DRIBUF(buf)->pitch = exaGetPixmapPitch(pPixmap);
DRIBUF(buf)->cpp = pPixmap->drawable.bitsPerPixel / 8;
DRIBUF(buf)->flags = 0;
buf->refcnt = 1;
buf->previous_canflip = canflip(pDraw);
ret = armsoc_bo_get_name(bo, &DRIBUF(buf)->name);
if (ret) {
ERROR_MSG("could not get buffer name: %d", ret);
goto fail;
}
if (canflip(pDraw) && buffer->attachment != DRI2BufferFrontLeft) {
/* Create an fb around this buffer. This will fail and we will
* fall back to blitting if the display controller hardware
* cannot scan out this buffer (for example, if it doesn't
* support the format or there was insufficient scanout memory
* at buffer creation time). */
int ret = armsoc_bo_add_fb(bo);
if (ret) {
WARNING_MSG(
"Falling back to blitting a flippable window");
}
#if DRI2INFOREC_VERSION >= 6
else if (FALSE == DRI2SwapLimit(pDraw, pARMSOC->swap_chain_size)) {
WARNING_MSG(
"Failed to set DRI2SwapLimit(%x,%d)",
(unsigned int)pDraw, pARMSOC->swap_chain_size);
}
#endif /* DRI2INFOREC_VERSION >= 6 */
}
DRI2_BUFFER_SET_FB(DRIBUF(buf)->flags, armsoc_bo_get_fb(bo) > 0 ? 1 : 0);
DRI2_BUFFER_SET_REUSED(DRIBUF(buf)->flags, 0);
/* Register Pixmap as having a buffer that can be accessed externally,
* so needs synchronised access */
ARMSOCRegisterExternalAccess(pPixmap);
return TRUE;
fail:
if (pPixmap != NULL) {
if (buffer->attachment != DRI2BufferFrontLeft)
pScreen->DestroyPixmap(pPixmap);
else
pPixmap->refcnt--;
}
return FALSE;
}