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-rw-r--r--widget/gtk/WindowSurfaceX11.cpp64
1 files changed, 64 insertions, 0 deletions
diff --git a/widget/gtk/WindowSurfaceX11.cpp b/widget/gtk/WindowSurfaceX11.cpp
new file mode 100644
index 000000000..32e3c43ef
--- /dev/null
+++ b/widget/gtk/WindowSurfaceX11.cpp
@@ -0,0 +1,64 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "WindowSurfaceX11.h"
+#include "gfxPlatform.h"
+#include "X11UndefineNone.h"
+
+namespace mozilla {
+namespace widget {
+
+WindowSurfaceX11::WindowSurfaceX11(Display* aDisplay,
+ Window aWindow,
+ Visual* aVisual,
+ unsigned int aDepth)
+ : mDisplay(aDisplay)
+ , mWindow(aWindow)
+ , mVisual(aVisual)
+ , mDepth(aDepth)
+ , mFormat(GetVisualFormat(aVisual, aDepth))
+{
+}
+
+/* static */
+gfx::SurfaceFormat
+WindowSurfaceX11::GetVisualFormat(const Visual* aVisual, unsigned int aDepth)
+{
+ switch (aDepth) {
+ case 32:
+ if (aVisual->red_mask == 0xff0000 &&
+ aVisual->green_mask == 0xff00 &&
+ aVisual->blue_mask == 0xff) {
+ return gfx::SurfaceFormat::B8G8R8A8;
+ }
+ break;
+ case 24:
+ // Only support the BGRX layout, and report it as BGRA to the compositor.
+ // The alpha channel will be discarded when we put the image.
+ // Cairo/pixman lacks some fast paths for compositing BGRX onto BGRA, so
+ // just report it as BGRX directly in that case.
+ if (aVisual->red_mask == 0xff0000 &&
+ aVisual->green_mask == 0xff00 &&
+ aVisual->blue_mask == 0xff) {
+ gfx::BackendType backend = gfxPlatform::GetPlatform()->GetDefaultContentBackend();
+ return backend == gfx::BackendType::CAIRO ? gfx::SurfaceFormat::B8G8R8X8
+ : gfx::SurfaceFormat::B8G8R8A8;
+ }
+ break;
+ case 16:
+ if (aVisual->red_mask == 0xf800 &&
+ aVisual->green_mask == 0x07e0 &&
+ aVisual->blue_mask == 0x1f) {
+ return gfx::SurfaceFormat::R5G6B5_UINT16;
+ }
+ break;
+ }
+
+ return gfx::SurfaceFormat::UNKNOWN;
+}
+
+} // namespace widget
+} // namespace mozilla