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, 103 insertions, 0 deletions

diff --git a/progs/SConscript b/progs/SConscript
index aa6640cf7a..20be60972d 100644
--- a/progs/SConscript
+++ b/progs/SConscript
@@ -56,4 +56,5 @@ SConscript([
     'wgl/SConscript',
     'perf/SConscript',
     'gallium/unit/SConscript',
+    'gallium/raw/SConscript',
 ])
diff --git a/progs/gallium/raw/SConscript b/progs/gallium/raw/SConscript
new file mode 100644
index 0000000000..073b97951e
--- /dev/null
+++ b/progs/gallium/raw/SConscript
@@ -0,0 +1,17 @@
+Import('*')
+
+env = env.Clone()
+
+env.Prepend(LIBPATH = [graw.dir])
+env.Prepend(LIBS = [graw.name])
+
+progs = [
+    'clear'
+]
+
+for prog in progs:
+    env.Program(
+        target = prog,
+        source = prog + '.c',
+    )
+
diff --git a/progs/gallium/raw/clear.c b/progs/gallium/raw/clear.c
new file mode 100644
index 0000000000..e46d135224
--- /dev/null
+++ b/progs/gallium/raw/clear.c
@@ -0,0 +1,85 @@
+/* Display a cleared blue window.  This demo has no dependencies on
+ * any utility code, just the graw interface and gallium.
+ */
+
+#include "state_tracker/graw.h"
+#include "pipe/p_screen.h"
+#include "pipe/p_context.h"
+#include "pipe/p_state.h"
+#include "pipe/p_defines.h"
+#include <unistd.h>             /* for sleep() */
+
+enum pipe_format formats[] = {
+   PIPE_FORMAT_R8G8B8A8_UNORM,
+   PIPE_FORMAT_B8G8R8A8_UNORM,
+   PIPE_FORMAT_NONE
+};
+
+static const int WIDTH = 300;
+static const int HEIGHT = 300;
+
+int main( int argc, char *argv[] )
+{
+   struct pipe_screen *screen;
+   struct pipe_context *pipe;
+   struct pipe_surface *surf;
+   struct pipe_framebuffer_state fb;
+   struct pipe_texture *tex, templat;
+   void *window = NULL;
+   float clear_color[4] = {1,0,1,1};
+   int i;
+
+   screen = graw_init();
+   if (screen == NULL)
+      exit(1);
+
+   for (i = 0; 
+        window == NULL && formats[i] != PIPE_FORMAT_NONE;
+        i++) {
+      
+      window = graw_create_window(0,0,300,300, formats[i]);
+   }
+   
+   if (window == NULL)
+      exit(2);
+   
+   pipe = screen->context_create(screen, NULL);
+   if (pipe == NULL)
+      exit(3);
+
+   templat.target = PIPE_TEXTURE_2D;
+   templat.format = formats[i];
+   templat.width0 = WIDTH;
+   templat.height0 = HEIGHT;
+   templat.depth0 = 1;
+   templat.last_level = 0;
+   templat.nr_samples = 1;
+   templat.tex_usage = (PIPE_TEXTURE_USAGE_RENDER_TARGET |
+                        PIPE_TEXTURE_USAGE_DISPLAY_TARGET);
+   
+   tex = screen->texture_create(screen,
+                                &templat);
+   if (tex == NULL)
+      exit(4);
+
+   surf = screen->get_tex_surface(screen, tex, 0, 0, 0,
+                                  PIPE_TEXTURE_USAGE_RENDER_TARGET |
+                                  PIPE_TEXTURE_USAGE_DISPLAY_TARGET);
+   if (surf == NULL)
+      exit(5);
+
+   memset(&fb, 0, sizeof fb);
+   fb.nr_cbufs = 1;
+   fb.width = WIDTH;
+   fb.height = HEIGHT;
+   fb.cbufs[0] = surf;
+
+   pipe->set_framebuffer_state(pipe, &fb);
+   pipe->clear(pipe, PIPE_CLEAR_COLOR, clear_color, 0, 0);
+   pipe->flush(pipe, PIPE_FLUSH_RENDER_CACHE, NULL);
+
+   screen->flush_frontbuffer(screen, surf, window);
+
+   sleep(100);
+   return 0;
+}