summaryrefslogtreecommitdiffstats
path: root/src/gallium/targets/libgl-xlib/xlib.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/gallium/targets/libgl-xlib/xlib.c')
-rw-r--r--src/gallium/targets/libgl-xlib/xlib.c211
1 files changed, 211 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 00000000000..69b4ddd33f7
--- /dev/null
+++ b/src/gallium/targets/libgl-xlib/xlib.c
@@ -0,0 +1,211 @@
+/**************************************************************************
+ *
+ * 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 "util/u_debug.h"
+#include "target-helpers/wrap_screen.h"
+#include "state_tracker/xlib_sw_winsys.h"
+#include "xm_public.h"
+
+#include "state_tracker/st_gl_api.h"
+
+/* piggy back on this libGL for OpenGL support in EGL */
+struct st_api *
+st_api_create_OpenGL()
+{
+ return st_gl_api_create();
+}
+
+
+/* Helper function to choose and instantiate one of the software rasterizers:
+ * cell, llvmpipe, softpipe.
+ *
+ * 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.
+ *
+ * Copies (full or partial):
+ * targets/libgl-xlib
+ * targets/graw-xlib
+ * targets/dri-swrast
+ * winsys/sw/drm
+ * drivers/sw
+ *
+ */
+
+#ifdef GALLIUM_SOFTPIPE
+#include "softpipe/sp_public.h"
+#endif
+
+#ifdef GALLIUM_LLVMPIPE
+#include "llvmpipe/lp_public.h"
+#endif
+
+#ifdef GALLIUM_CELL
+#include "cell/ppu/cell_public.h"
+#endif
+
+static struct pipe_screen *
+swrast_create_screen(struct sw_winsys *winsys)
+{
+ const char *default_driver;
+ const char *driver;
+ struct pipe_screen *screen = 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);
+
+#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
+
+ return screen;
+}
+
+/* Helper function to build a subset of a driver stack consisting of
+ * one of the software rasterizers (cell, llvmpipe, softpipe) and the
+ * xlib winsys.
+ */
+static struct pipe_screen *
+swrast_xlib_create_screen( Display *display )
+{
+ 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;
+
+ /* Create a software rasterizer on top of that winsys:
+ */
+ screen = swrast_create_screen( winsys );
+ 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_gl_api_create,
+};
+
+
+/* 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 */