working copy of "zero_copy"

ui/gl/gl_image_x11.cc

Index: ui/gl/gl_image_x11.cc
===================================================================
--- ui/gl/gl_image_x11.cc	(revision 277402)
+++ ui/gl/gl_image_x11.cc	(working copy)
@@ -4,7 +4,9 @@
 
 #include "ui/gl/gl_image.h"
 
+#include <linux/types.h>
 #include "base/debug/trace_event.h"
+#include "ui/gl/gl_image_egl.h"
 #include "ui/gl/gl_image_glx.h"
 #include "ui/gl/gl_image_shm.h"
 #include "ui/gl/gl_image_stub.h"
@@ -12,6 +14,10 @@
 
 namespace gfx {
 
+#define fourcc_code(a, b, c, d) ((__u32)(a) | ((__u32)(b) << 8) | \
+                                 ((__u32)(c) << 16) | ((__u32)(d) << 24))
+#define DRM_FORMAT_ARGB8888 fourcc_code('A', 'R', '2', '4')
+
 scoped_refptr<GLImage> GLImage::CreateGLImage(gfx::PluginWindowHandle window) {
   TRACE_EVENT0("gpu", "GLImage::CreateGLImage");
   switch (GetGLImplementation()) {
@@ -52,6 +58,28 @@
 
           return image;
         }
+
+        case DMA_BUFFER: {
+          // TODO(kalyan): We should get stride as part of buffer handle ?
+          EGLint attr[] = {
+          EGL_WIDTH, size.width(),
+          EGL_HEIGHT, size.height(),
+          EGL_LINUX_DRM_FOURCC_EXT, DRM_FORMAT_ARGB8888,
+          EGL_DMA_BUF_PLANE0_FD_EXT, buffer.handle.fd,
+          EGL_DMA_BUF_PLANE0_OFFSET_EXT, 0,
+          EGL_DMA_BUF_PLANE0_PITCH_EXT, buffer.stride,
+          EGL_NONE
+          };
+
+          scoped_refptr<GLImageEGL> image(
+            new GLImageEGL(size));
+          if (!image->Initialize(EGL_LINUX_DMA_BUF_EXT,
+                                 (EGLClientBuffer)NULL,
+                                 attr))
+            return NULL;
+
+          return image;
+        }
         default:
           NOTREACHED();
           return NULL;