/************************************************************************** * * 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/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; }; /* 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 void 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); } static void 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); } static void 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); } static void xm_flush_frontbuffer(struct pipe_winsys *pws, struct pipe_surface *surf ) { /* 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. */ } static void xm_wait_idle(struct pipe_winsys *pws) { /* no-op */ } 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) { 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 struct pipe_region * xm_region_alloc(struct pipe_winsys *winsys, unsigned cpp, unsigned width, unsigned height, unsigned flags) { struct pipe_region *region = CALLOC_STRUCT(pipe_region); const unsigned alignment = 64; region->cpp = cpp; region->pitch = round_up(width, alignment / cpp); region->height = height; region->refcount = 1; assert(region->pitch > 0); region->buffer = winsys->buffer_create( winsys, alignment ) ; /* NULL data --> just allocate the space */ winsys->buffer_data( winsys, region->buffer, region->pitch * cpp * height, NULL, PIPE_BUFFER_USAGE_PIXEL ); return region; } static void xm_region_release(struct pipe_winsys *winsys, struct pipe_region **region) { if (!*region) return; assert((*region)->refcount > 0); (*region)->refcount--; if ((*region)->refcount == 0) { assert((*region)->map_refcount == 0); winsys->buffer_reference( winsys, &((*region)->buffer), NULL ); free(*region); } *region = NULL; } /** * Called via pipe->surface_alloc() to create new surfaces (textures, * renderbuffers, etc. */ static struct pipe_surface * xm_surface_alloc(struct pipe_winsys *ws, GLuint pipeFormat) { struct xmesa_surface *xms = CALLOC_STRUCT(xmesa_surface); assert(ws); assert(pipeFormat); xms->surface.format = pipeFormat; xms->surface.refcount = 1; #if 0 /* * This is really just a softpipe surface, not an XImage/Pixmap surface. */ softpipe_init_surface_funcs(&xms->surface); #endif return &xms->surface; } /** * 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->region_alloc = xm_region_alloc; ws->region_release = xm_region_release; ws->surface_alloc = xm_surface_alloc; ws->flush_frontbuffer = xm_flush_frontbuffer; ws->wait_idle = xm_wait_idle; ws->printf = xm_printf; ws->get_name = xm_get_name; } return ws; } /** * XXX this depends on the depths supported by the screen (8/16/32/etc). * Maybe when we're about to create a context/drawable we create a new * softpipe_winsys object that corresponds to the specified screen... * * Also, this query only really matters for on-screen drawables. * For textures and FBOs we (softpipe) can support any format.o */ static boolean xmesa_is_format_supported(struct softpipe_winsys *sws, uint format) { switch (format) { case PIPE_FORMAT_U_A8_R8_G8_B8: case PIPE_FORMAT_S_R16_G16_B16_A16: case PIPE_FORMAT_S8_Z24: return TRUE; default: return FALSE; }; } /** * Return pointer to a softpipe_winsys object. * For Xlib, this is a singleton object. */ static struct softpipe_winsys * xmesa_get_softpipe_winsys(void) { static struct softpipe_winsys *spws = NULL; if (!spws) { spws = CALLOC_STRUCT(softpipe_winsys); if (spws) { spws->is_format_supported = xmesa_is_format_supported; } } return spws; } struct pipe_context * xmesa_create_context(XMesaContext xmesa) { struct pipe_winsys *pws = xmesa_get_pipe_winsys(); struct softpipe_winsys *spws = xmesa_get_softpipe_winsys(); return softpipe_create( pws, spws ); }