gallium: new raw gallium interface to support standalone tests

Provides basic window system integration behind a simple interface,
allowing tests to be written without dependency on either the driver
or window system.

With a lot of work, could turn into something like glut for gallium.

3 files changed, 274 insertions, 0 deletions

diff --git a/src/gallium/targets/graw-xlib/SConscript b/src/gallium/targets/graw-xlib/SConscript
new file mode 100644
index 0000000000..24cea92f90
--- /dev/null
+++ b/src/gallium/targets/graw-xlib/SConscript
@@ -0,0 +1,57 @@
+#######################################################################
+# SConscript for xlib winsys
+
+Import('*')
+
+if env['platform'] != 'linux':
+    Return()
+
+if not set(('softpipe', 'llvmpipe', 'cell')).intersection(env['drivers']):
+    print 'warning: no supported pipe driver: skipping build of xlib libGL.so'
+    Return()
+
+env = env.Clone()
+
+env.Prepend(LIBS = [
+    ws_xlib,
+    trace,
+    identity,
+#    gallium,
+])
+
+env.Append(CPPPATH = [
+    '#src/gallium/drivers',
+])
+
+
+sources = [
+    'graw_xlib.c',
+]
+
+if 'softpipe' in env['drivers']:
+    env.Append(CPPDEFINES = 'GALLIUM_SOFTPIPE')
+    env.Prepend(LIBS = [softpipe])
+
+if 'llvmpipe' in env['drivers']:
+    env.Tool('llvm')
+    if 'LLVM_VERSION' in env:
+        env.Append(CPPDEFINES = 'GALLIUM_LLVMPIPE')
+        env.Tool('udis86')
+        env.Prepend(LIBS = [llvmpipe])
+
+# Need this for trace, identity drivers referenced by
+# gallium_wrap_screen().
+#
+env.Prepend(LIBS = [gallium])
+
+# TODO: write a wrapper function http://www.scons.org/wiki/WrapperFunctions
+graw = env.SharedLibrary(
+    target ='graw',
+    source = sources,
+)
+
+env.InstallSharedLibrary(graw, version=(1, 0))
+
+graw = env.FindIxes(graw, 'SHLIBPREFIX', 'SHLIBSUFFIX')
+
+Export('graw')
diff --git a/src/gallium/targets/graw-xlib/graw.h b/src/gallium/targets/graw-xlib/graw.h
new file mode 100644
index 0000000000..a58e18e473
--- /dev/null
+++ b/src/gallium/targets/graw-xlib/graw.h
@@ -0,0 +1,36 @@
+#ifndef GALLIUM_RAW_H
+#define GALLIUM_RAW_H
+
+/* This is an API for exercising gallium functionality in a
+ * platform-neutral fashion.  Whatever platform integration is
+ * necessary to implement this interface is orchestrated by the
+ * individual target building this entity.
+ *
+ * For instance, the graw-xlib target includes code to implent these
+ * interfaces on top of the X window system.
+ *
+ * Programs using this interface may additionally benefit from some of
+ * the utilities currently in the libgallium.a library, especially
+ * those for parsing text representations of TGSI shaders.
+ */
+
+#include "pipe/p_format.h"
+
+struct pipe_screen;
+
+struct pipe_screen *graw_init( void );
+
+/* Returns a handle to be used with flush_frontbuffer()/present().
+ *
+ * Query format support with screen::is_format_supported and usage
+ * XXX.
+ */
+void *graw_create_window( int x,
+                          int y,
+                          unsigned width,
+                          unsigned height,
+                          enum pipe_format format );
+
+void graw_destroy_window( void *handle );
+
+#endif
diff --git a/src/gallium/targets/graw-xlib/graw_xlib.c b/src/gallium/targets/graw-xlib/graw_xlib.c
new file mode 100644
index 0000000000..fb8ef9d78b
--- /dev/null
+++ b/src/gallium/targets/graw-xlib/graw_xlib.c
@@ -0,0 +1,181 @@
+#include "pipe/p_compiler.h"
+#include "util/u_debug.h"
+#include "util/u_memory.h"
+#include "target-helpers/wrap_screen.h"
+#include "state_tracker/xlib_sw_winsys.h"
+
+#ifdef GALLIUM_SOFTPIPE
+#include "softpipe/sp_public.h"
+#endif
+
+#ifdef GALLIUM_LLVMPIPE
+#include "llvmpipe/lp_public.h"
+#endif
+
+/* Haven't figured out a decent way to build the helper code yet -
+ * #include it here temporarily.
+ */
+#include "sw/sw_public.h"
+#include "sw/sw.c"
+
+#include "graw.h"
+
+#include <X11/Xlib.h>
+#include <X11/Xlibint.h>
+#include <X11/Xutil.h>
+#include <stdio.h>
+
+static struct {
+   Display *display;
+} graw;
+
+
+struct pipe_screen *
+graw_init( void )
+{
+   const char *default_driver;
+   const char *driver;
+   struct pipe_screen *screen = NULL;
+   struct sw_winsys *winsys = NULL;
+
+   graw.display = XOpenDisplay(NULL);
+   if (graw.display == NULL)
+      return NULL;
+
+   /* Create the underlying winsys, which performs presents to Xlib
+    * drawables:
+    */
+   winsys = xlib_create_sw_winsys( graw.display );
+   if (winsys == NULL)
+      return NULL;
+
+#if 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_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
+
+   /* Inject any wrapping layers we want to here:
+    */
+   return gallium_wrap_screen( screen );
+}
+
+
+ 
+
+
+void *
+graw_create_window( int x,
+                    int y,
+                    unsigned width,
+                    unsigned height,
+                    enum pipe_format format )
+{
+   struct xlib_drawable *handle = NULL;
+   XSetWindowAttributes attr;
+   Window root;
+   Window win = 0;
+   XVisualInfo templat, *visinfo = NULL;
+   unsigned mask;
+   int n;
+   int scrnum;
+
+
+   scrnum = DefaultScreen( graw.display );
+   root = RootWindow( graw.display, scrnum );
+
+
+   if (format != PIPE_FORMAT_R8G8B8A8_UNORM)
+      goto fail;
+
+   if (graw.display == NULL)
+      goto fail;
+
+   handle = CALLOC_STRUCT(xlib_drawable);
+   if (handle == NULL)
+      goto fail;
+
+
+   mask = VisualScreenMask | VisualDepthMask | VisualClassMask;
+   templat.screen = DefaultScreen(graw.display);
+   templat.depth = 32;
+   templat.class = TrueColor;
+
+   visinfo = XGetVisualInfo(graw.display, mask, &templat, &n);
+   if (!visinfo) {
+      printf("Error: couldn't get an RGB, Double-buffered visual\n");
+      exit(1);
+   }
+
+   /* window attributes */
+   attr.background_pixel = 0;
+   attr.border_pixel = 0;
+   attr.colormap = XCreateColormap( graw.display, root, visinfo->visual, AllocNone);
+   attr.event_mask = StructureNotifyMask | ExposureMask | KeyPressMask;
+   /* XXX this is a bad way to get a borderless window! */
+   mask = CWBackPixel | CWBorderPixel | CWColormap | CWEventMask;
+
+   win = XCreateWindow( graw.display, root, x, y, width, height,
+		        0, visinfo->depth, InputOutput,
+		        visinfo->visual, mask, &attr );
+
+
+   /* set hints and properties */
+   {
+      char *name = NULL;
+      XSizeHints sizehints;
+      sizehints.x = x;
+      sizehints.y = y;
+      sizehints.width  = width;
+      sizehints.height = height;
+      sizehints.flags = USSize | USPosition;
+      XSetNormalHints(graw.display, win, &sizehints);
+      XSetStandardProperties(graw.display, win, name, name,
+                              None, (char **)NULL, 0, &sizehints);
+   }
+
+   XFree(visinfo);
+   XMapWindow(graw.display, win);
+   while (1) {
+      XEvent e;
+      XNextEvent( graw.display, &e );
+      if (e.type == MapNotify && e.xmap.window == win) {
+	 break;
+      }
+   }
+   
+   handle->visual = visinfo->visual;
+   handle->drawable = (Drawable)win;
+   handle->depth = visinfo->depth;
+   return (void *)handle;
+
+fail:
+   FREE(handle);
+   XFree(visinfo);
+
+   if (win)
+      XDestroyWindow(graw.display, win);
+
+   return NULL;
+}
+
+
+void
+graw_destroy_window( void *xlib_drawable )
+{
+}
+