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Diffstat (limited to 'src/gallium/winsys/xlib/xlib_softpipe.c')
-rw-r--r--src/gallium/winsys/xlib/xlib_softpipe.c744
1 files changed, 744 insertions, 0 deletions
diff --git a/src/gallium/winsys/xlib/xlib_softpipe.c b/src/gallium/winsys/xlib/xlib_softpipe.c
new file mode 100644
index 00000000000..e4aa2d4b6ae
--- /dev/null
+++ b/src/gallium/winsys/xlib/xlib_softpipe.c
@@ -0,0 +1,744 @@
+/**************************************************************************
+ *
+ * Copyright 2007 Tungsten Graphics, Inc., Bismarck, ND., USA
+ * 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 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
+ * THE COPYRIGHT HOLDERS, AUTHORS 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.
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ *
+ *
+ **************************************************************************/
+
+/*
+ * Authors:
+ * Keith Whitwell
+ * Brian Paul
+ */
+
+
+#include "glxheader.h"
+#include "xmesaP.h"
+
+#undef ASSERT
+#undef Elements
+
+#include "pipe/p_winsys.h"
+#include "pipe/p_format.h"
+#include "pipe/p_context.h"
+#include "pipe/p_inlines.h"
+#include "util/u_math.h"
+#include "util/u_memory.h"
+#include "softpipe/sp_winsys.h"
+
+#ifdef GALLIUM_CELL
+#include "cell/ppu/cell_context.h"
+#include "cell/ppu/cell_screen.h"
+#include "cell/ppu/cell_winsys.h"
+#else
+#define TILE_SIZE 32 /* avoid compilation errors */
+#endif
+
+#include "xlib_softpipe.h"
+
+/**
+ * Subclass of pipe_buffer for Xlib winsys.
+ * Low-level OS/window system memory buffer
+ */
+struct xm_buffer
+{
+ struct pipe_buffer base;
+ boolean userBuffer; /** Is this a user-space buffer? */
+ void *data;
+ void *mapped;
+
+ XImage *tempImage;
+ int shm;
+#if defined(USE_XSHM)
+ XShmSegmentInfo shminfo;
+#endif
+};
+
+
+/**
+ * Subclass of pipe_winsys for Xlib winsys
+ */
+struct xmesa_pipe_winsys
+{
+ struct pipe_winsys base;
+/* struct xmesa_visual *xm_visual; */
+ int shm;
+};
+
+
+
+/** Cast wrapper */
+static INLINE struct xm_buffer *
+xm_buffer( struct pipe_buffer *buf )
+{
+ return (struct xm_buffer *)buf;
+}
+
+
+/**
+ * X Shared Memory Image extension code
+ */
+#if defined(USE_XSHM)
+
+#define XSHM_ENABLED(b) ((b)->shm)
+
+static volatile int mesaXErrorFlag = 0;
+
+/**
+ * Catches potential Xlib errors.
+ */
+static int
+mesaHandleXError(XMesaDisplay *dpy, XErrorEvent *event)
+{
+ (void) dpy;
+ (void) event;
+ mesaXErrorFlag = 1;
+ return 0;
+}
+
+
+static GLboolean alloc_shm(struct xm_buffer *buf, unsigned size)
+{
+ XShmSegmentInfo *const shminfo = & buf->shminfo;
+
+ shminfo->shmid = shmget(IPC_PRIVATE, size, IPC_CREAT|0777);
+ if (shminfo->shmid < 0) {
+ return GL_FALSE;
+ }
+
+ shminfo->shmaddr = (char *) shmat(shminfo->shmid, 0, 0);
+ if (shminfo->shmaddr == (char *) -1) {
+ shmctl(shminfo->shmid, IPC_RMID, 0);
+ return GL_FALSE;
+ }
+
+ shminfo->readOnly = False;
+ return GL_TRUE;
+}
+
+
+/**
+ * Allocate a shared memory XImage back buffer for the given XMesaBuffer.
+ */
+static void
+alloc_shm_ximage(struct xm_buffer *b, struct xmesa_buffer *xmb,
+ unsigned width, unsigned height)
+{
+ /*
+ * We have to do a _lot_ of error checking here to be sure we can
+ * really use the XSHM extension. It seems different servers trigger
+ * errors at different points if the extension won't work. Therefore
+ * we have to be very careful...
+ */
+#if 0
+ GC gc;
+#endif
+ int (*old_handler)(XMesaDisplay *, XErrorEvent *);
+
+ b->tempImage = XShmCreateImage(xmb->xm_visual->display,
+ xmb->xm_visual->visinfo->visual,
+ xmb->xm_visual->visinfo->depth,
+ ZPixmap,
+ NULL,
+ &b->shminfo,
+ width, height);
+ if (b->tempImage == NULL) {
+ b->shm = 0;
+ return;
+ }
+
+
+ mesaXErrorFlag = 0;
+ old_handler = XSetErrorHandler(mesaHandleXError);
+ /* This may trigger the X protocol error we're ready to catch: */
+ XShmAttach(xmb->xm_visual->display, &b->shminfo);
+ XSync(xmb->xm_visual->display, False);
+
+ if (mesaXErrorFlag) {
+ /* we are on a remote display, this error is normal, don't print it */
+ XFlush(xmb->xm_visual->display);
+ mesaXErrorFlag = 0;
+ XDestroyImage(b->tempImage);
+ b->tempImage = NULL;
+ b->shm = 0;
+ (void) XSetErrorHandler(old_handler);
+ return;
+ }
+
+
+ /* Finally, try an XShmPutImage to be really sure the extension works */
+#if 0
+ gc = XCreateGC(xmb->xm_visual->display, xmb->drawable, 0, NULL);
+ XShmPutImage(xmb->xm_visual->display, xmb->drawable, gc,
+ b->tempImage, 0, 0, 0, 0, 1, 1 /*one pixel*/, False);
+ XSync(xmb->xm_visual->display, False);
+ XFreeGC(xmb->xm_visual->display, gc);
+ (void) XSetErrorHandler(old_handler);
+ if (mesaXErrorFlag) {
+ XFlush(xmb->xm_visual->display);
+ mesaXErrorFlag = 0;
+ XDestroyImage(b->tempImage);
+ b->tempImage = NULL;
+ b->shm = 0;
+ return;
+ }
+#endif
+}
+
+#else
+
+#define XSHM_ENABLED(b) 0
+
+static void
+alloc_shm_ximage(struct xm_buffer *b, struct xmesa_buffer *xmb,
+ unsigned width, unsigned height)
+{
+ b->shm = 0;
+}
+#endif /* USE_XSHM */
+
+
+
+
+/* Most callbacks map direcly onto dri_bufmgr operations:
+ */
+static void *
+xm_buffer_map(struct pipe_winsys *pws, struct pipe_buffer *buf,
+ unsigned flags)
+{
+ struct xm_buffer *xm_buf = xm_buffer(buf);
+ xm_buf->mapped = xm_buf->data;
+ return xm_buf->mapped;
+}
+
+static void
+xm_buffer_unmap(struct pipe_winsys *pws, struct pipe_buffer *buf)
+{
+ struct xm_buffer *xm_buf = xm_buffer(buf);
+ xm_buf->mapped = NULL;
+}
+
+static void
+xm_buffer_destroy(struct pipe_winsys *pws,
+ struct pipe_buffer *buf)
+{
+ struct xm_buffer *oldBuf = xm_buffer(buf);
+
+ if (oldBuf->data) {
+#if defined(USE_XSHM)
+ if (oldBuf->shminfo.shmid >= 0) {
+ shmdt(oldBuf->shminfo.shmaddr);
+ shmctl(oldBuf->shminfo.shmid, IPC_RMID, 0);
+
+ oldBuf->shminfo.shmid = -1;
+ oldBuf->shminfo.shmaddr = (char *) -1;
+ }
+ else
+#endif
+ {
+ if (!oldBuf->userBuffer) {
+ align_free(oldBuf->data);
+ }
+ }
+
+ oldBuf->data = NULL;
+ }
+
+ free(oldBuf);
+}
+
+
+/**
+ * For Cell. Basically, rearrange the pixels/quads from this layout:
+ * +--+--+--+--+
+ * |p0|p1|p2|p3|....
+ * +--+--+--+--+
+ *
+ * to this layout:
+ * +--+--+
+ * |p0|p1|....
+ * +--+--+
+ * |p2|p3|
+ * +--+--+
+ */
+static void
+twiddle_tile(const uint *tileIn, uint *tileOut)
+{
+ int y, x;
+
+ for (y = 0; y < TILE_SIZE; y+=2) {
+ for (x = 0; x < TILE_SIZE; x+=2) {
+ int k = 4 * (y/2 * TILE_SIZE/2 + x/2);
+ tileOut[y * TILE_SIZE + (x + 0)] = tileIn[k];
+ tileOut[y * TILE_SIZE + (x + 1)] = tileIn[k+1];
+ tileOut[(y + 1) * TILE_SIZE + (x + 0)] = tileIn[k+2];
+ tileOut[(y + 1) * TILE_SIZE + (x + 1)] = tileIn[k+3];
+ }
+ }
+}
+
+
+
+/**
+ * Display a surface that's in a tiled configuration. That is, all the
+ * pixels for a TILE_SIZExTILE_SIZE block are contiguous in memory.
+ */
+void
+xlib_cell_display_surface(struct xmesa_buffer *b, struct pipe_surface *surf)
+{
+ XImage *ximage;
+ struct xm_buffer *xm_buf = xm_buffer(surf->buffer);
+ const uint tilesPerRow = (surf->width + TILE_SIZE - 1) / TILE_SIZE;
+ uint x, y;
+
+ if (XSHM_ENABLED(xm_buf) && (xm_buf->tempImage == NULL)) {
+ alloc_shm_ximage(xm_buf, b, TILE_SIZE, TILE_SIZE);
+ }
+
+ ximage = (XSHM_ENABLED(xm_buf)) ? xm_buf->tempImage : b->tempImage;
+
+ /* check that the XImage has been previously initialized */
+ assert(ximage->format);
+ assert(ximage->bitmap_unit);
+
+ if (!XSHM_ENABLED(xm_buf)) {
+ /* update XImage's fields */
+ ximage->width = TILE_SIZE;
+ ximage->height = TILE_SIZE;
+ ximage->bytes_per_line = TILE_SIZE * 4;
+ }
+
+ for (y = 0; y < surf->height; y += TILE_SIZE) {
+ for (x = 0; x < surf->width; x += TILE_SIZE) {
+ uint tmpTile[TILE_SIZE * TILE_SIZE];
+ int tx = x / TILE_SIZE;
+ int ty = y / TILE_SIZE;
+ int offset = ty * tilesPerRow + tx;
+ int w = TILE_SIZE;
+ int h = TILE_SIZE;
+
+ if (y + h > surf->height)
+ h = surf->height - y;
+ if (x + w > surf->width)
+ w = surf->width - x;
+
+ /* offset in pixels */
+ offset *= TILE_SIZE * TILE_SIZE;
+
+ if (0 && XSHM_ENABLED(xm_buf)) {
+ ximage->data = (char *) xm_buf->data + 4 * offset;
+ /* make copy of tile data */
+ memcpy(tmpTile, (uint *) ximage->data, sizeof(tmpTile));
+ /* twiddle from temp to ximage in shared memory */
+ twiddle_tile(tmpTile, (uint *) ximage->data);
+ /* display image in shared memory */
+#if defined(USE_XSHM)
+ XShmPutImage(b->xm_visual->display, b->drawable, b->gc,
+ ximage, 0, 0, x, y, w, h, False);
+#endif
+ }
+ else {
+ /* twiddle from ximage buffer to temp tile */
+ twiddle_tile((uint *) xm_buf->data + offset, tmpTile);
+ /* display temp tile data */
+ ximage->data = (char *) tmpTile;
+ XPutImage(b->xm_visual->display, b->drawable, b->gc,
+ ximage, 0, 0, x, y, w, h);
+ }
+ }
+ }
+}
+
+
+/**
+ * Display/copy the image in the surface into the X window specified
+ * by the XMesaBuffer.
+ */
+void
+xlib_softpipe_display_surface(struct xmesa_buffer *b,
+ struct pipe_surface *surf)
+{
+ XImage *ximage;
+ struct xm_buffer *xm_buf = xm_buffer(surf->buffer);
+ static boolean no_swap = 0;
+ static boolean firsttime = 1;
+ static int tileSize = 0;
+
+ if (firsttime) {
+ no_swap = getenv("SP_NO_RAST") != NULL;
+#ifdef GALLIUM_CELL
+ if (!getenv("GALLIUM_NOCELL")) {
+ tileSize = 32; /** probably temporary */
+ }
+#endif
+ firsttime = 0;
+ }
+
+ if (no_swap)
+ return;
+
+ if (tileSize) {
+ xlib_cell_display_surface(b, surf);
+ return;
+ }
+
+ if (XSHM_ENABLED(xm_buf) && (xm_buf->tempImage == NULL)) {
+ assert(surf->block.width == 1);
+ assert(surf->block.height == 1);
+ alloc_shm_ximage(xm_buf, b, surf->stride/surf->block.size, surf->height);
+ }
+
+ ximage = (XSHM_ENABLED(xm_buf)) ? xm_buf->tempImage : b->tempImage;
+ ximage->data = xm_buf->data;
+
+ /* display image in Window */
+ if (XSHM_ENABLED(xm_buf)) {
+#if defined(USE_XSHM)
+ XShmPutImage(b->xm_visual->display, b->drawable, b->gc,
+ ximage, 0, 0, 0, 0, surf->width, surf->height, False);
+#endif
+ } else {
+ /* check that the XImage has been previously initialized */
+ assert(ximage->format);
+ assert(ximage->bitmap_unit);
+
+ /* update XImage's fields */
+ ximage->width = surf->width;
+ ximage->height = surf->height;
+ ximage->bytes_per_line = surf->stride;
+
+ XPutImage(b->xm_visual->display, b->drawable, b->gc,
+ ximage, 0, 0, 0, 0, surf->width, surf->height);
+ }
+}
+
+
+static void
+xm_flush_frontbuffer(struct pipe_winsys *pws,
+ struct pipe_surface *surf,
+ void *context_private)
+{
+ /*
+ * The front color buffer is actually just another XImage buffer.
+ * This function copies that XImage to the actual X Window.
+ */
+ XMesaContext xmctx = (XMesaContext) context_private;
+ xlib_softpipe_display_surface(xmctx->xm_buffer, surf);
+}
+
+
+
+static const char *
+xm_get_name(struct pipe_winsys *pws)
+{
+ return "Xlib";
+}
+
+
+static struct pipe_buffer *
+xm_buffer_create(struct pipe_winsys *pws,
+ unsigned alignment,
+ unsigned usage,
+ unsigned size)
+{
+ struct xm_buffer *buffer = CALLOC_STRUCT(xm_buffer);
+#if defined(USE_XSHM)
+ struct xmesa_pipe_winsys *xpws = (struct xmesa_pipe_winsys *) pws;
+#endif
+
+ buffer->base.refcount = 1;
+ buffer->base.alignment = alignment;
+ buffer->base.usage = usage;
+ buffer->base.size = size;
+
+
+#if defined(USE_XSHM)
+ buffer->shminfo.shmid = -1;
+ buffer->shminfo.shmaddr = (char *) -1;
+
+ if (xpws->shm && (usage & PIPE_BUFFER_USAGE_PIXEL) != 0) {
+ buffer->shm = xpws->shm;
+
+ if (alloc_shm(buffer, size)) {
+ buffer->data = buffer->shminfo.shmaddr;
+ }
+ }
+#endif
+
+ if (buffer->data == NULL) {
+ buffer->shm = 0;
+
+ /* align to 16-byte multiple for Cell */
+ buffer->data = align_malloc(size, max(alignment, 16));
+ }
+
+ return &buffer->base;
+}
+
+
+/**
+ * Create buffer which wraps user-space data.
+ */
+static struct pipe_buffer *
+xm_user_buffer_create(struct pipe_winsys *pws, void *ptr, unsigned bytes)
+{
+ struct xm_buffer *buffer = CALLOC_STRUCT(xm_buffer);
+ buffer->base.refcount = 1;
+ buffer->base.size = bytes;
+ buffer->userBuffer = TRUE;
+ buffer->data = ptr;
+ buffer->shm = 0;
+
+ return &buffer->base;
+}
+
+
+
+/**
+ * Round n up to next multiple.
+ */
+static INLINE unsigned
+round_up(unsigned n, unsigned multiple)
+{
+ return (n + multiple - 1) & ~(multiple - 1);
+}
+
+static int
+xm_surface_alloc_storage(struct pipe_winsys *winsys,
+ struct pipe_surface *surf,
+ unsigned width, unsigned height,
+ enum pipe_format format,
+ unsigned flags,
+ unsigned tex_usage)
+{
+ const unsigned alignment = 64;
+
+ surf->width = width;
+ surf->height = height;
+ surf->format = format;
+ pf_get_block(format, &surf->block);
+ surf->nblocksx = pf_get_nblocksx(&surf->block, width);
+ surf->nblocksy = pf_get_nblocksy(&surf->block, height);
+ surf->stride = round_up(surf->nblocksx * surf->block.size, alignment);
+ surf->usage = flags;
+
+ assert(!surf->buffer);
+ surf->buffer = winsys->buffer_create(winsys, alignment,
+ PIPE_BUFFER_USAGE_PIXEL,
+#ifdef GALLIUM_CELL /* XXX a bit of a hack */
+ surf->stride * round_up(surf->nblocksy, TILE_SIZE));
+#else
+ surf->stride * surf->nblocksy);
+#endif
+
+ if(!surf->buffer)
+ return -1;
+
+ return 0;
+}
+
+
+/**
+ * Called via winsys->surface_alloc() to create new surfaces.
+ */
+static struct pipe_surface *
+xm_surface_alloc(struct pipe_winsys *ws)
+{
+ struct pipe_surface *surface = CALLOC_STRUCT(pipe_surface);
+
+ assert(ws);
+
+ surface->refcount = 1;
+ surface->winsys = ws;
+
+ return surface;
+}
+
+
+
+static void
+xm_surface_release(struct pipe_winsys *winsys, struct pipe_surface **s)
+{
+ struct pipe_surface *surf = *s;
+ assert(!surf->texture);
+ surf->refcount--;
+ if (surf->refcount == 0) {
+ if (surf->buffer)
+ winsys_buffer_reference(winsys, &surf->buffer, NULL);
+ free(surf);
+ }
+ *s = NULL;
+}
+
+
+/*
+ * Fence functions - basically nothing to do, as we don't create any actual
+ * fence objects.
+ */
+
+static void
+xm_fence_reference(struct pipe_winsys *sws, struct pipe_fence_handle **ptr,
+ struct pipe_fence_handle *fence)
+{
+}
+
+
+static int
+xm_fence_signalled(struct pipe_winsys *sws, struct pipe_fence_handle *fence,
+ unsigned flag)
+{
+ return 0;
+}
+
+
+static int
+xm_fence_finish(struct pipe_winsys *sws, struct pipe_fence_handle *fence,
+ unsigned flag)
+{
+ return 0;
+}
+
+
+
+struct pipe_winsys *
+xlib_create_softpipe_winsys( void )
+{
+ static struct xmesa_pipe_winsys *ws = NULL;
+
+ if (!ws) {
+ ws = CALLOC_STRUCT(xmesa_pipe_winsys);
+
+ //ws->shm = xmesa_check_for_xshm( display );
+
+ /* Fill in this struct with callbacks that pipe will need to
+ * communicate with the window system, buffer manager, etc.
+ */
+ ws->base.buffer_create = xm_buffer_create;
+ ws->base.user_buffer_create = xm_user_buffer_create;
+ ws->base.buffer_map = xm_buffer_map;
+ ws->base.buffer_unmap = xm_buffer_unmap;
+ ws->base.buffer_destroy = xm_buffer_destroy;
+
+ ws->base.surface_alloc = xm_surface_alloc;
+ ws->base.surface_alloc_storage = xm_surface_alloc_storage;
+ ws->base.surface_release = xm_surface_release;
+
+ ws->base.fence_reference = xm_fence_reference;
+ ws->base.fence_signalled = xm_fence_signalled;
+ ws->base.fence_finish = xm_fence_finish;
+
+ ws->base.flush_frontbuffer = xm_flush_frontbuffer;
+ ws->base.get_name = xm_get_name;
+ }
+
+ return &ws->base;
+}
+
+
+struct pipe_screen *
+xlib_create_softpipe_screen( struct pipe_winsys *pws )
+{
+ struct pipe_screen *screen;
+
+ screen = softpipe_create_screen(pws);
+ if (screen == NULL)
+ goto fail;
+
+ return screen;
+
+fail:
+ return NULL;
+}
+
+
+struct pipe_context *
+xlib_create_softpipe_context( struct pipe_screen *screen,
+ void *context_private )
+{
+ struct pipe_context *pipe;
+
+ pipe = softpipe_create(screen, screen->winsys, NULL);
+ if (pipe == NULL)
+ goto fail;
+
+ pipe->priv = context_private;
+ return pipe;
+
+fail:
+ /* Free stuff here */
+ return NULL;
+}
+
+
+/***********************************************************************
+ * Cell piggybacks on softpipe code still.
+ *
+ * Should be untangled sufficiently to live in a separate file, at
+ * least. That would mean removing #ifdef GALLIUM_CELL's from above
+ * and creating cell-specific versions of either those functions or
+ * the entire file.
+ */
+struct pipe_winsys *
+xlib_create_cell_winsys( void )
+{
+ return xlib_create_softpipe_winsys();
+}
+
+struct pipe_screen *
+xlib_create_cell_screen( struct pipe_winsys *pws )
+{
+ return xlib_create_softpipe_screen( pws );
+}
+
+
+struct pipe_context *
+xlib_create_cell_context( struct pipe_screen *screen,
+ void *priv )
+{
+#ifdef GALLIUM_CELL
+ struct cell_winsys *cws;
+ struct pipe_context *pipe;
+
+ if (getenv("GALLIUM_NOCELL"))
+ return xlib_create_softpipe_context( screen, priv );
+
+
+ /* This takes a cell_winsys pointer, but probably that should be
+ * created and stored at screen creation, not context creation.
+ *
+ * The actual cell_winsys value isn't used for anything, so just
+ * passing NULL for now.
+ */
+ pipe = cell_create_context( screen, NULL);
+ if (pipe == NULL)
+ goto fail;
+
+ pipe->priv = priv;
+
+ return pipe;
+
+fail:
+#endif
+ return NULL;
+}
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