Add format modifier IDs for EGL_EXT_image_dma_buf_import extension

ui/ozone/platform/drm/gpu/gbm_buffer.h

Index: ui/ozone/platform/drm/gpu/gbm_buffer.h
diff --git a/ui/ozone/platform/drm/gpu/gbm_buffer.h b/ui/ozone/platform/drm/gpu/gbm_buffer.h
index 3674f8850533e1d161dff067234fdf4483cd6482..6a29eda84c44c2699768bf5eb1c62cea0a49b39a 100644
--- a/ui/ozone/platform/drm/gpu/gbm_buffer.h
+++ b/ui/ozone/platform/drm/gpu/gbm_buffer.h
@@ -39,6 +39,7 @@ class GbmBuffer : public GbmBufferBase {
   bool AreFdsValid() const;
   int GetFd(size_t plane) const;
   int GetStride(size_t plane) const;
+  uint64_t GetFormatModifier(size_t plane) const;
   gfx::Size GetSize() const override;
 
  private:
@@ -48,7 +49,8 @@ class GbmBuffer : public GbmBufferBase {
             gfx::BufferUsage usage,
             std::vector<base::ScopedFD>&& fds,
             const gfx::Size& size,
-            const std::vector<int>& strides);
+            const std::vector<int>& strides,
+            const std::vector<uint64_t>& modifiers);

[marcheu1, 2016/06/07 01:29:07]

Is there a way we can have multiple modifiers? I didn't think so.

[vinceh, 2016/06/07 01:56:30]

Since the patch "Add support for multiple FDs to NativePixmap/GbmBuffer" we have
multiple strides, I think that also applies to modifiers?

   ~GbmBuffer() override;
 
   gfx::BufferFormat format_;
@@ -56,6 +58,7 @@ class GbmBuffer : public GbmBufferBase {
   std::vector<base::ScopedFD> fds_;
   gfx::Size size_;
   std::vector<int> strides_;
+  std::vector<uint64_t> modifiers_;
 
   DISALLOW_COPY_AND_ASSIGN(GbmBuffer);
 };
@@ -73,6 +76,7 @@ class GbmPixmap : public NativePixmap {
   bool AreDmaBufFdsValid() const override;
   int GetDmaBufFd(size_t plane) const override;
   int GetDmaBufPitch(size_t plane) const override;
+  uint64_t GetDmaBufModifier(size_t plane) const override;
   gfx::BufferFormat GetBufferFormat() const override;
   gfx::Size GetBufferSize() const override;
   bool ScheduleOverlayPlane(gfx::AcceleratedWidget widget,