EGL: Updates GDL platform support

The GDL API is used for example on intel ce4100 (aka Sodaville) based
systems as a way to allocate memory that can be composited using the
platforms overlay hardware. This updates the Cogl EGL winsys and the
support in Clutter so we can continue to support these platforms.

cogl/Makefile.am

@@ -338,7 +338,7 @@ if SUPPORT_EGL_PLATFORM_POWERVR_NULL
 cogl_sources_c += \
        $(srcdir)/winsys/cogl-winsys-egl.c
 endif
-if SUPPORT_EGL_PLATFORM_POWERVR_GDL
+if SUPPORT_EGL_PLATFORM_GDL
 cogl_sources_c += \
        $(srcdir)/winsys/cogl-winsys-egl.c
 endif

cogl/cogl-display-private.h

@@ -26,6 +26,7 @@
 #define __COGL_DISPLAY_PRIVATE_H
 
 #include "cogl-object-private.h"
+#include "cogl-display.h"
 #include "cogl-renderer.h"
 #include "cogl-onscreen-template.h"
 
@@ -37,6 +38,10 @@ struct _CoglDisplay
   CoglRenderer *renderer;
   CoglOnscreenTemplate *onscreen_template;
 
+#ifdef COGL_HAS_EGL_PLATFORM_GDL_SUPPORT
+  struct gdl_plane *gdl_plane;
+#endif
+
   void *winsys;
 };
 

cogl/cogl-display.c

@@ -121,3 +121,15 @@ cogl_display_setup (CoglDisplay *display,
 
   return TRUE;
 }
+
+#ifdef COGL_HAS_EGL_PLATFORM_GDL_SUPPORT
+void
+cogl_gdl_display_set_plane (CoglDisplay *display,
+                            struct gdl_plane *plane)
+{
+  g_return_if_fail (display->setup == FALSE);
+
+  display->gdl_plane = plane;
+}
+#endif
+

cogl/cogl-display.h

@@ -36,6 +36,10 @@
 
 G_BEGIN_DECLS
 
+#ifdef COGL_HAS_EGL_PLATFORM_GDL_SUPPORT
+#include <@CLUTTER_CEX100_LIBGDL_PREFIX@libgdl.h>
+#endif
+
 /**
  * SECTION:cogl-display
  * @short_description: Represents a display pipeline
@@ -82,6 +86,14 @@ gboolean
 cogl_display_setup (CoglDisplay *display,
                     GError **error);
 
+#ifdef COGL_HAS_EGL_PLATFORM_GDL_SUPPORT
+#define cogl_gdl_display_set_plane \
+  cogl_gdl_display_set_plane_EXP
+void
+cogl_gdl_display_set_plane (CoglDisplay *display,
+                            struct gdl_plane *plane);
+#endif
+
 G_END_DECLS
 
 #endif /* __COGL_DISPLAY_H__ */

cogl/cogl-swap-chain-private.h

@@ -32,6 +32,7 @@ struct _CoglSwapChain
 
   gboolean has_alpha;
 
+  int length;
 };
 
 #endif /* __COGL_SWAP_CHAIN_PRIVATE_H */

cogl/cogl-swap-chain.c

@@ -54,6 +54,8 @@ cogl_swap_chain_new (void)
 {
   CoglSwapChain *swap_chain = g_slice_new0 (CoglSwapChain);
 
+  swap_chain->length = -1; /* no preference */
+
   return _cogl_swap_chain_object_new (swap_chain);
 }
 
@@ -64,3 +66,9 @@ cogl_swap_chain_set_has_alpha (CoglSwapChain *swap_chain,
   swap_chain->has_alpha = has_alpha;
 }
 
+void
+cogl_swap_chain_set_length (CoglSwapChain *swap_chain,
+                            int length)
+{
+  swap_chain->length = length;
+}

cogl/cogl-swap-chain.h

@@ -41,6 +41,11 @@ void
 cogl_swap_chain_set_has_alpha (CoglSwapChain *swap_chain,
                                gboolean has_alpha);
 
+#define cogl_swap_chain_set_length cogl_swap_chain_set_length_EXP
+void
+cogl_swap_chain_set_length (CoglSwapChain *swap_chain,
+                            int length);
+
 G_END_DECLS
 
 #endif /* __COGL_SWAP_CHAIN_H__ */

cogl/winsys/cogl-winsys-egl.c

@@ -81,6 +81,10 @@ typedef struct _CoglRendererEGL
   EGLint egl_version_major;
   EGLint egl_version_minor;
 
+#ifdef COGL_HAS_EGL_PLATFORM_GDL_SUPPORT
+  gboolean gdl_initialized;
+#endif
+
   /* Function pointers for GLX specific extensions */
 #define COGL_WINSYS_FEATURE_BEGIN(a, b, c, d, e, f)
 
@@ -105,7 +109,8 @@ typedef struct _CoglDisplayEGL
   EGLContext egl_context;
 #ifdef COGL_HAS_EGL_PLATFORM_POWERVR_X11_SUPPORT
   EGLSurface dummy_surface;
-#elif defined (COGL_HAS_EGL_PLATFORM_POWERVR_NULL_SUPPORT)
+#elif defined (COGL_HAS_EGL_PLATFORM_POWERVR_NULL_SUPPORT) || \
+      defined (COGL_HAS_EGL_PLATFORM_GDL_SUPPORT)
   EGLSurface egl_surface;
   int egl_surface_width;
   int egl_surface_height;
@@ -242,6 +247,11 @@ _cogl_winsys_renderer_disconnect (CoglRenderer *renderer)
 {
   CoglRendererEGL *egl_renderer = renderer->winsys;
 
+#ifdef COGL_HAS_EGL_PLATFORM_GDL_SUPPORT
+  if (egl_renderer->gdl_initialized)
+    gdl_close ();
+#endif
+
 #ifdef COGL_HAS_EGL_PLATFORM_POWERVR_X11_SUPPORT
   _cogl_renderer_xlib_disconnect (renderer);
 #endif
@@ -260,6 +270,10 @@ _cogl_winsys_renderer_connect (CoglRenderer *renderer,
   CoglRendererXlib *xlib_renderer;
 #endif
   EGLBoolean status;
+#ifdef COGL_HAS_EGL_PLATFORM_GDL_SUPPORT
+  gdl_ret_t rc = GDL_SUCCESS;
+  gdl_display_info_t gdl_display_info;
+#endif
 
   renderer->winsys = g_slice_new0 (CoglRendererEGL);
 
@@ -282,6 +296,7 @@ _cogl_winsys_renderer_connect (CoglRenderer *renderer,
   status = eglInitialize (egl_renderer->edpy,
 			  &egl_renderer->egl_version_major,
 			  &egl_renderer->egl_version_minor);
+#endif
 
   if (status != EGL_TRUE)
     {
@@ -290,6 +305,32 @@ _cogl_winsys_renderer_connect (CoglRenderer *renderer,
                    "Failed to initialize EGL");
       goto error;
     }
+
+#ifdef COGL_HAS_EGL_PLATFORM_GDL_SUPPORT
+  /* Check we can talk to the GDL library */
+
+  rc = gdl_init (NULL);
+  if (rc != GDL_SUCCESS)
+    {
+      g_set_error (error, COGL_WINSYS_ERROR,
+                   COGL_WINSYS_ERROR_INIT,
+                   "GDL initialize failed. %s",
+                   gdl_get_error_string (rc));
+      goto error;
+    }
+
+  rc = gdl_get_display_info (GDL_DISPLAY_ID_0, &gdl_display_info);
+  if (rc != GDL_SUCCESS)
+    {
+      g_set_error (error, COGL_WINSYS_ERROR,
+                   COGL_WINSYS_ERROR_INIT,
+                   "GDL failed to get display information: %s",
+                   gdl_get_error_string (rc));
+      gdl_close ();
+      goto error;
+    }
+
+  gdl_close ();
 #endif
 
   return TRUE;
@@ -427,6 +468,12 @@ try_create_context (CoglDisplay *display,
 
     EGL_DEPTH_SIZE,      1,
 
+    /* XXX: Why does the GDL platform choose these by default? */
+#ifdef COGL_HAS_EGL_PLATFORM_GDL_SUPPORT
+    EGL_BIND_TO_TEXTURE_RGBA, EGL_TRUE,
+    EGL_BIND_TO_TEXTURE_RGB, EGL_TRUE,
+#endif
+
     EGL_BUFFER_SIZE,     EGL_DONT_CARE,
 
 #if defined (HAVE_COGL_GL)
@@ -528,6 +575,8 @@ try_create_context (CoglDisplay *display,
 
   if (egl_display->dummy_surface == EGL_NO_SURFACE)
     {
+      /* FIXME: we shouldn't be calling g_set_error here we should
+       * just set error_message same goes for below. */
       g_set_error (error, COGL_WINSYS_ERROR,
                    COGL_WINSYS_ERROR_CREATE_CONTEXT,
                    "Unable to create an EGL surface");
@@ -688,6 +737,81 @@ _cogl_winsys_display_destroy (CoglDisplay *display)
   display->winsys = NULL;
 }
 
+#ifdef COGL_HAS_EGL_PLATFORM_GDL_SUPPORT
+static gboolean
+gdl_plane_init (CoglDisplay *display, GError **error)
+{
+  gboolean ret = TRUE;
+  gdl_color_space_t colorSpace = GDL_COLOR_SPACE_RGB;
+  gdl_rectangle_t dstRect;
+  gdl_display_info_t display_info;
+  gdl_ret_t rc = GDL_SUCCESS;
+
+  if (!display->gdl_plane)
+    {
+      g_set_error (error, COGL_WINSYS_ERROR, COGL_WINSYS_ERROR_CREATE_CONTEXT,
+                   "No GDL plane specified with "
+                   "cogl_gdl_display_set_plane");
+      return FALSE;
+    }
+
+  rc = gdl_init (NULL);
+  if (rc != GDL_SUCCESS)
+    {
+      g_set_error (error, COGL_WINSYS_ERROR, COGL_WINSYS_ERROR_CREATE_CONTEXT,
+                   "GDL initialize failed. %s", gdl_get_error_string (rc));
+      return FALSE;
+    }
+
+  rc = gdl_get_display_info (GDL_DISPLAY_ID_0, &display_info);
+  if (rc != GDL_SUCCESS)
+    {
+      g_set_error (error, COGL_WINSYS_ERROR, COGL_WINSYS_ERROR_CREATE_CONTEXT,
+                   "GDL failed to get display infomation: %s",
+                   gdl_get_error_string (rc));
+      gdl_close ();
+      return FALSE;
+    }
+
+  dstRect.origin.x = 0;
+  dstRect.origin.y = 0;
+  dstRect.width = display_info.tvmode.width;
+  dstRect.height = display_info.tvmode.height;
+
+  /* Configure the plane attribute. */
+  rc = gdl_plane_reset (plane);
+  if (rc == GDL_SUCCESS)
+    rc = gdl_plane_config_begin (plane);
+
+  if (rc == GDL_SUCCESS)
+    rc = gdl_plane_set_attr (GDL_PLANE_SRC_COLOR_SPACE, &colorSpace);
+
+  if (rc == GDL_SUCCESS)
+    rc = gdl_plane_set_attr (GDL_PLANE_PIXEL_FORMAT, &pixfmt);
+
+  if (rc == GDL_SUCCESS)
+    rc = gdl_plane_set_attr (GDL_PLANE_DST_RECT, &dstRect);
+
+  if (rc == GDL_SUCCESS)
+    rc = gdl_plane_set_uint (GDL_PLANE_NUM_GFX_SURFACES,
+                             display->swap_chain->length);
+
+  if (rc == GDL_SUCCESS)
+    rc = gdl_plane_config_end (GDL_FALSE);
+  else
+    gdl_plane_config_end (GDL_TRUE);
+
+  if (rc != GDL_SUCCESS)
+    {
+      g_set_error (error, COGL_WINSYS_ERROR, COGL_WINSYS_ERROR_CREATE_CONTEXT,
+                   "GDL configuration failed: %s.", gdl_get_error_string (rc));
+      ret = FALSE;
+    }
+
+  gdl_close ();
+}
+#endif
+
 static gboolean
 _cogl_winsys_display_setup (CoglDisplay *display,
                             GError **error)
@@ -699,6 +823,11 @@ _cogl_winsys_display_setup (CoglDisplay *display,
   egl_display = g_slice_new0 (CoglDisplayEGL);
   display->winsys = egl_display;
 
+#ifdef COGL_HAS_EGL_PLATFORM_GDL_SUPPORT
+  if (!gdl_plane_init (display, error))
+    goto error;
+#endif
+
   if (!create_context (display, error))
     goto error;
 

configure.ac

@@ -271,7 +271,7 @@ AM_CONDITIONAL(SUPPORT_XLIB, [true])
 AM_CONDITIONAL(SUPPORT_EGL, [false])
 AM_CONDITIONAL(SUPPORT_EGL_PLATFORM_POWERVR_X11, [false])
 AM_CONDITIONAL(SUPPORT_EGL_PLATFORM_POWERVR_NULL, [false])
-AM_CONDITIONAL(SUPPORT_EGL_PLATFORM_POWERVR_GDL, [false])
+AM_CONDITIONAL(SUPPORT_EGL_PLATFORM_GDL, [false])
 AM_CONDITIONAL(SUPPORT_OSX, [false])
 AM_CONDITIONAL(SUPPORT_WIN32, [false])
 AM_CONDITIONAL(SUPPORT_CEX100, [false])