diff options
Diffstat (limited to 'src/gallium/targets/libgl-xlib/xlib.c')
| -rw-r--r-- | src/gallium/targets/libgl-xlib/xlib.c | 183 |
1 files changed, 183 insertions, 0 deletions
diff --git a/src/gallium/targets/libgl-xlib/xlib.c b/src/gallium/targets/libgl-xlib/xlib.c new file mode 100644 index 0000000000..48e79fe4f3 --- /dev/null +++ b/src/gallium/targets/libgl-xlib/xlib.c @@ -0,0 +1,183 @@ +/************************************************************************** + * + * 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 + */ +#include "pipe/p_compiler.h" +#include "state_tracker/xlib_sw_winsys.h" +#include "util/u_debug.h" +#include "softpipe/sp_public.h" +#include "llvmpipe/lp_public.h" +#include "cell/ppu/cell_public.h" +#include "target-helpers/wrap_screen.h" +#include "xm_public.h" + +#include "state_tracker/st_manager.h" + +/* advertise OpenGL support */ +PUBLIC const int st_api_OpenGL = 1; + +PUBLIC const struct st_module st_module_OpenGL = { + .api = ST_API_OPENGL, + .create_api = st_manager_create_api +}; + +/* Helper function to build a subset of a driver stack consisting of + * one of the software rasterizers (cell, llvmpipe, softpipe) and the + * xlib winsys. + * + * This function could be shared, but currently causes headaches for + * the build systems, particularly scons if we try. Long term, want + * to avoid having global #defines for things like GALLIUM_LLVMPIPE, + * GALLIUM_CELL, etc. Scons already eliminates those #defines, so + * things that are painful for it now are likely to be painful for + * other build systems in the future. + */ +static struct pipe_screen * +swrast_xlib_create_screen( Display *display ) +{ + const char *default_driver; + const char *driver; + struct sw_winsys *winsys; + struct pipe_screen *screen = NULL; + + /* Create the underlying winsys, which performs presents to Xlib + * drawables: + */ + winsys = xlib_create_sw_winsys( display ); + if (winsys == NULL) + return NULL; + +#if defined(GALLIUM_CELL) + default_driver = "cell"; +#elif defined(GALLIUM_LLVMPIPE) + default_driver = "llvmpipe"; +#elif defined(GALLIUM_SOFTPIPE) + default_driver = "softpipe"; +#else + default_driver = ""; +#endif + + driver = debug_get_option("GALLIUM_DRIVER", default_driver); + + /* Create a software rasterizer on top of that winsys: + */ +#if defined(GALLIUM_CELL) + if (screen == NULL && + strcmp(driver, "cell") == 0) + screen = cell_create_screen( winsys ); +#endif + +#if defined(GALLIUM_LLVMPIPE) + if (screen == NULL && + strcmp(driver, "llvmpipe") == 0) + screen = llvmpipe_create_screen( winsys ); +#endif + +#if defined(GALLIUM_SOFTPIPE) + if (screen == NULL) + screen = softpipe_create_screen( winsys ); +#endif + + if (screen == NULL) + goto fail; + + /* Inject any wrapping layers we want to here: + */ + return gallium_wrap_screen( screen ); + +fail: + if (winsys) + winsys->destroy( winsys ); + + return NULL; +} + +static struct xm_driver xlib_driver = +{ + .create_pipe_screen = swrast_xlib_create_screen, + .create_st_api = st_manager_create_api, +}; + + +/* Build the rendering stack. + */ +static void _init( void ) __attribute__((constructor)); +static void _init( void ) +{ + /* Initialize the xlib libgl code, pass in the winsys: + */ + xmesa_set_driver( &xlib_driver ); +} + + +/*********************************************************************** + * + * Butt-ugly hack to convince the linker not to throw away public GL + * symbols (they are all referenced from getprocaddress, I guess). + */ +extern void (*linker_foo(const unsigned char *procName))(); +extern void (*glXGetProcAddress(const unsigned char *procName))(); + +extern void (*linker_foo(const unsigned char *procName))() +{ + return glXGetProcAddress(procName); +} + + +/** + * When GLX_INDIRECT_RENDERING is defined, some symbols are missing in + * libglapi.a. We need to define them here. + */ +#ifdef GLX_INDIRECT_RENDERING + +#define GL_GLEXT_PROTOTYPES +#include "GL/gl.h" +#include "glapi/glapi.h" +#include "glapi/glapitable.h" +#include "glapi/glapidispatch.h" + +#if defined(USE_MGL_NAMESPACE) +#define NAME(func) mgl##func +#else +#define NAME(func) gl##func +#endif + +#define DISPATCH(FUNC, ARGS, MESSAGE) \ + CALL_ ## FUNC(GET_DISPATCH(), ARGS); + +#define RETURN_DISPATCH(FUNC, ARGS, MESSAGE) \ + return CALL_ ## FUNC(GET_DISPATCH(), ARGS); + +/* skip normal ones */ +#define _GLAPI_SKIP_NORMAL_ENTRY_POINTS +#include "glapi/glapitemp.h" + +#endif /* GLX_INDIRECT_RENDERING */ |