st/egl_g3d: New EGL state tracker that uses Gallium.

This new (intermediate) EGL state tracker is the base work for EGL
drivers that uses Gallium.  It makes it easier to support new window
systems.

Currently, there is support only for X11.  This driver supports multiple
APIs (OpenVG, OpenGL, ...) and supports hardware acceleration through
winsys/drm.

Signed-off-by: Chia-I Wu <[email protected]>

1 files changed, 168 insertions, 0 deletions

diff --git a/src/gallium/state_trackers/egl_g3d/common/native.h b/src/gallium/state_trackers/egl_g3d/common/native.h
new file mode 100644
index 00000000000..34abd86a31f
--- /dev/null
+++ b/src/gallium/state_trackers/egl_g3d/common/native.h
@@ -0,0 +1,168 @@
+/*
+ * Mesa 3-D graphics library
+ * Version:  7.8
+ *
+ * Copyright (C) 2009-2010 Chia-I Wu <[email protected]>
+ *
+ * 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, sublicense,
+ * 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 above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * 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 NONINFRINGEMENT.  IN NO EVENT SHALL
+ * BRIAN PAUL 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.
+ */
+
+#ifndef _NATIVE_H_
+#define _NATIVE_H_
+
+#include "EGL/egl.h"  /* for EGL native types */
+#include "GL/gl.h" /* for GL types needed by __GLcontextModes */
+#include "GL/internal/glcore.h"  /* for __GLcontextModes */
+
+#include "pipe/p_compiler.h"
+#include "pipe/p_screen.h"
+#include "pipe/p_context.h"
+#include "pipe/p_state.h"
+
+/**
+ * Only color buffers are listed.  The others are allocated privately through,
+ * for example, st_renderbuffer_alloc_storage().
+ */
+enum native_attachment {
+   NATIVE_ATTACHMENT_FRONT_LEFT,
+   NATIVE_ATTACHMENT_BACK_LEFT,
+   NATIVE_ATTACHMENT_FRONT_RIGHT,
+   NATIVE_ATTACHMENT_BACK_RIGHT,
+
+   NUM_NATIVE_ATTACHMENTS
+};
+
+struct native_surface {
+   void (*destroy)(struct native_surface *nsurf);
+
+   /**
+    * Swap the front and back buffers so that the back buffer is visible.  It
+    * is no-op if the surface is single-buffered.  The contents of the back
+    * buffer after swapping may or may not be preserved.
+    */
+   boolean (*swap_buffers)(struct native_surface *nsurf);
+
+   /**
+    * Make the front buffer visible.  In some native displays, changes to the
+    * front buffer might not be visible immediately and require manual flush.
+    */
+   boolean (*flush_frontbuffer)(struct native_surface *nsurf);
+
+   /**
+    * Validate the buffers of the surface.  Those not listed in the attachments
+    * will be destroyed.  The returned textures are owned by the caller.
+    */
+   boolean (*validate)(struct native_surface *nsurf,
+                       const enum native_attachment *natts,
+                       unsigned num_natts,
+                       struct pipe_texture **textures,
+                       int *width, int *height);
+
+   /**
+    * Wait until all native commands affecting the surface has been executed.
+    */
+   void (*wait)(struct native_surface *nsurf);
+};
+
+struct native_config {
+   __GLcontextModes mode;
+   enum pipe_format color_format;
+   enum pipe_format depth_format;
+   enum pipe_format stencil_format;
+};
+
+/**
+ * A pipe winsys abstracts the OS.  A pipe screen abstracts the graphcis
+ * hardware.  A native display consists of a pipe winsys, a pipe screen, and
+ * the native display server.
+ */
+struct native_display {
+   struct pipe_screen *screen;
+   void (*destroy)(struct native_display *ndpy);
+
+   /**
+    * Get the supported configs.  The configs are owned by the display, but
+    * the returned array should be free()ed.
+    *
+    * The configs will be converted to EGL config by
+    * _eglConfigFromContextModesRec and validated by _eglValidateConfig.
+    * Those failing to pass the test will be skipped.
+    */
+   const struct native_config **(*get_configs)(struct native_display *ndpy,
+                                               int *num_configs);
+
+   /**
+    * Create a pipe context.
+    */
+   struct pipe_context *(*create_context)(struct native_display *ndpy,
+                                          void *context_private);
+
+   /**
+    * Create a window surface.  Required unless no config has GLX_WINDOW_BIT
+    * set.
+    */
+   struct native_surface *(*create_window_surface)(struct native_display *ndpy,
+                                                   EGLNativeWindowType win,
+                                                   const struct native_config *nconf);
+
+   /**
+    * Create a pixmap surface.  Required unless no config has GLX_PIXMAP_BIT
+    * set.
+    */
+   struct native_surface *(*create_pixmap_surface)(struct native_display *ndpy,
+                                                   EGLNativePixmapType pix,
+                                                   const struct native_config *nconf);
+
+   /**
+    * Create a pbuffer surface.  Required unless no config has GLX_PBUFFER_BIT
+    * set.
+    */
+   struct native_surface *(*create_pbuffer_surface)(struct native_display *ndpy,
+                                                    const struct native_config *nconf,
+                                                    uint width, uint height);
+
+#if 0
+   struct native_mode *(*get_modes)(struct native_display *ndpy,
+                                    int *num_modes);
+
+   /**
+    * Create a screen surface.
+    */
+   struct native_surface *(*create_screen_surface)(struct native_display *ndpy,
+                                                   const struct native_config *nconf,
+                                                   uint width, uint height);
+
+   boolean (*set_mode)(struct native_display *ndpy,
+                       const struct native_mode *nmode,
+                       struct native_surface *nsurf);
+#endif
+};
+
+
+typedef void (*native_flush_frontbuffer)(void *dummy,
+                                         struct pipe_surface *surf,
+                                         void *context_private);
+
+const char *
+native_get_name(void);
+
+struct native_display *
+native_create_display(EGLNativeDisplayType dpy,
+                      native_flush_frontbuffer flush_frontbuffer);
+
+#endif /* _NATIVE_H_ */