/************************************************************************** * * 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" #include "main/macros.h" #include "pipe/p_winsys.h" #include "pipe/p_format.h" #include "pipe/p_context.h" #include "pipe/softpipe/sp_winsys.h" /** * Low-level OS/window system memory buffer */ struct xm_buffer { boolean userBuffer; /** Is this a user-space buffer? */ int refcount; unsigned size; void *data; void *mapped; }; struct xmesa_surface { struct pipe_surface surface; /* no extra fields for now */ }; /** * Derived from softpipe_winsys. * We just need one extra field which indicates the pixel format to use for * drawing surfaces so that we're compatible with the XVisual/window format. */ struct xmesa_softpipe_winsys { struct softpipe_winsys spws; enum pipe_format pixelformat; }; /** Cast wrapper */ static INLINE struct xmesa_surface * xmesa_surface(struct pipe_surface *ps) { assert(0); return (struct xmesa_surface *) ps; } /** cast wrapper */ static INLINE struct xmesa_softpipe_winsys * xmesa_softpipe_winsys(struct softpipe_winsys *spws) { return (struct xmesa_softpipe_winsys *) spws; } /** * Turn the softpipe opaque buffer pointer into a dri_bufmgr opaque * buffer pointer... */ static INLINE struct xm_buffer * xm_bo( struct pipe_buffer_handle *bo ) { return (struct xm_buffer *) bo; } static INLINE struct pipe_buffer_handle * pipe_bo( struct xm_buffer *bo ) { return (struct pipe_buffer_handle *) bo; } /* Most callbacks map direcly onto dri_bufmgr operations: */ static void * xm_buffer_map(struct pipe_winsys *pws, struct pipe_buffer_handle *buf, unsigned flags) { struct xm_buffer *xm_buf = xm_bo(buf); xm_buf->mapped = xm_buf->data; return xm_buf->mapped; } static void xm_buffer_unmap(struct pipe_winsys *pws, struct pipe_buffer_handle *buf) { struct xm_buffer *xm_buf = xm_bo(buf); xm_buf->mapped = NULL; } static void xm_buffer_reference(struct pipe_winsys *pws, struct pipe_buffer_handle **ptr, struct pipe_buffer_handle *buf) { if (*ptr) { struct xm_buffer *oldBuf = xm_bo(*ptr); oldBuf->refcount--; assert(oldBuf->refcount >= 0); if (oldBuf->refcount == 0) { if (oldBuf->data) { if (!oldBuf->userBuffer) free(oldBuf->data); oldBuf->data = NULL; } free(oldBuf); } *ptr = NULL; } assert(!(*ptr)); if (buf) { struct xm_buffer *newBuf = xm_bo(buf); newBuf->refcount++; *ptr = buf; } } static int xm_buffer_data(struct pipe_winsys *pws, struct pipe_buffer_handle *buf, unsigned size, const void *data, unsigned usage ) { struct xm_buffer *xm_buf = xm_bo(buf); assert(!xm_buf->userBuffer); if (xm_buf->size != size) { if (xm_buf->data) free(xm_buf->data); xm_buf->data = malloc(size); xm_buf->size = size; } if (data) memcpy(xm_buf->data, data, size); return 0; } static int xm_buffer_subdata(struct pipe_winsys *pws, struct pipe_buffer_handle *buf, unsigned long offset, unsigned long size, const void *data) { struct xm_buffer *xm_buf = xm_bo(buf); GLubyte *b = (GLubyte *) xm_buf->data; assert(!xm_buf->userBuffer); assert(b); memcpy(b + offset, data, size); return 0; } static int xm_buffer_get_subdata(struct pipe_winsys *pws, struct pipe_buffer_handle *buf, unsigned long offset, unsigned long size, void *data) { const struct xm_buffer *xm_buf = xm_bo(buf); const GLubyte *b = (GLubyte *) xm_buf->data; assert(!xm_buf->userBuffer); assert(b); memcpy(data, b + offset, size); return 0; } /** * Display/copy the image in the surface into the X window specified * by the XMesaBuffer. */ void xmesa_display_surface(XMesaBuffer b, const struct pipe_surface *surf) { XImage *ximage = b->tempImage; struct xm_buffer *xm_buf = xm_bo(surf->buffer); /* 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->pitch * (ximage->bits_per_pixel / 8); ximage->data = xm_buf->data; /* display image in Window */ 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 Xlib driver's front color surfaces are actually X Windows so * this flush is a no-op. * If we instead did front buffer rendering to a temporary XImage, * this would be the place to copy the Ximage to the on-screen Window. */ XMesaContext xmctx = (XMesaContext) context_private; xmesa_display_surface(xmctx->xm_buffer, surf); } static void xm_printf(struct pipe_winsys *pws, const char *fmtString, ...) { va_list args; va_start( args, fmtString ); vfprintf(stderr, fmtString, args); va_end( args ); } static const char * xm_get_name(struct pipe_winsys *pws) { return "Xlib"; } static struct pipe_buffer_handle * xm_buffer_create(struct pipe_winsys *pws, unsigned alignment, unsigned flags, unsigned hints) { struct xm_buffer *buffer = CALLOC_STRUCT(xm_buffer); buffer->refcount = 1; return pipe_bo(buffer); } /** * Create buffer which wraps user-space data. */ static struct pipe_buffer_handle * xm_user_buffer_create(struct pipe_winsys *pws, void *ptr, unsigned bytes) { struct xm_buffer *buffer = CALLOC_STRUCT(xm_buffer); buffer->userBuffer = TRUE; buffer->refcount = 1; buffer->data = ptr; buffer->size = bytes; return pipe_bo(buffer); } /** * Round n up to next multiple. */ static INLINE unsigned round_up(unsigned n, unsigned multiple) { return (n + multiple - 1) & ~(multiple - 1); } static unsigned xm_surface_pitch(struct pipe_winsys *winsys, unsigned cpp, unsigned width, unsigned flags) { return round_up(width, 64 / cpp); } /** * Called via pipe->surface_alloc() to create new surfaces (textures, * renderbuffers, etc. */ static struct pipe_surface * xm_surface_alloc(struct pipe_winsys *ws, enum pipe_format pipeFormat) { struct xmesa_surface *xms = CALLOC_STRUCT(xmesa_surface); assert(ws); assert(pipeFormat); xms->surface.format = pipeFormat; xms->surface.refcount = 1; xms->surface.winsys = ws; return &xms->surface; } static void xm_surface_release(struct pipe_winsys *winsys, struct pipe_surface **s) { struct pipe_surface *surf = *s; surf->refcount--; if (surf->refcount == 0) { if (surf->buffer) winsys->buffer_reference(winsys, &surf->buffer, NULL); free(surf); } *s = NULL; } /** * Return pointer to a pipe_winsys object. * For Xlib, this is a singleton object. * Nothing special for the Xlib driver so no subclassing or anything. */ static struct pipe_winsys * xmesa_get_pipe_winsys(void) { static struct pipe_winsys *ws = NULL; if (!ws) { ws = CALLOC_STRUCT(pipe_winsys); /* Fill in this struct with callbacks that pipe will need to * communicate with the window system, buffer manager, etc. */ ws->buffer_create = xm_buffer_create; ws->user_buffer_create = xm_user_buffer_create; ws->buffer_map = xm_buffer_map; ws->buffer_unmap = xm_buffer_unmap; ws->buffer_reference = xm_buffer_reference; ws->buffer_data = xm_buffer_data; ws->buffer_subdata = xm_buffer_subdata; ws->buffer_get_subdata = xm_buffer_get_subdata; ws->surface_pitch = xm_surface_pitch; ws->surface_alloc = xm_surface_alloc; ws->surface_release = xm_surface_release; ws->flush_frontbuffer = xm_flush_frontbuffer; ws->printf = xm_printf; ws->get_name = xm_get_name; } return ws; } /** * Called via softpipe_winsys->is_format_supported(). * This function is only called to test formats for front/back color surfaces. * The winsys being queried will have been created at glXCreateContext * time, with a pixel format corresponding to the context's visual. */ static boolean xmesa_is_format_supported(struct softpipe_winsys *sws, enum pipe_format format) { struct xmesa_softpipe_winsys *xmws = xmesa_softpipe_winsys(sws); return (format == xmws->pixelformat); } /** * Return pointer to a softpipe_winsys object. */ static struct softpipe_winsys * xmesa_get_softpipe_winsys(uint pixelformat) { struct xmesa_softpipe_winsys *xmws = CALLOC_STRUCT(xmesa_softpipe_winsys); if (!xmws) return NULL; xmws->spws.is_format_supported = xmesa_is_format_supported; xmws->pixelformat = pixelformat; return &xmws->spws; } struct pipe_context * xmesa_create_pipe_context(XMesaContext xmesa, uint pixelformat) { struct pipe_winsys *pws = xmesa_get_pipe_winsys(); struct softpipe_winsys *spws = xmesa_get_softpipe_winsys(pixelformat); struct pipe_context *pipe; pipe = softpipe_create( pws, spws ); if (pipe) pipe->priv = xmesa; return pipe; }