Bug 973227 - Add a new X11TextureSourceOGL for upload x11 pixmaps to textures. r=nical

gfx/layers/opengl/X11TextureSourceOGL.cpp

@@ -0,0 +1,80 @@
+/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * 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/. */
+
+#ifdef GL_PROVIDER_GLX
+
+#include "X11TextureSourceOGL.h"
+#include "mozilla/layers/CompositorOGL.h"
+#include "gfxXlibSurface.h"
+#include "gfx2DGlue.h"
+
+using namespace mozilla;
+using namespace mozilla::layers;
+using namespace mozilla::gfx;
+
+X11TextureSourceOGL::X11TextureSourceOGL(CompositorOGL* aCompositor, gfxXlibSurface* aSurface)
+  : mCompositor(aCompositor),
+    mSurface(aSurface)
+{
+}
+
+void
+X11TextureSourceOGL::BindTexture(GLenum aTextureUnit)
+{
+  GLuint tex = mCompositor->GetTemporaryTexture(aTextureUnit);
+
+  gl()->fActiveTexture(aTextureUnit);
+  gl()->fBindTexture(LOCAL_GL_TEXTURE_2D, tex);
+
+  gl::sGLXLibrary.xBindTexImage(mSurface->XDisplay(), mSurface->GetGLXPixmap(),
+                                LOCAL_GLX_FRONT_LEFT_EXT, NULL);
+
+  gl()->fTexParameteri(LOCAL_GL_TEXTURE_2D, LOCAL_GL_TEXTURE_MIN_FILTER, LOCAL_GL_LINEAR);
+  gl()->fTexParameteri(LOCAL_GL_TEXTURE_2D, LOCAL_GL_TEXTURE_MAG_FILTER, LOCAL_GL_LINEAR);
+
+  gl()->fActiveTexture(LOCAL_GL_TEXTURE0);
+}
+
+IntSize
+X11TextureSourceOGL::GetSize() const
+{
+  return ToIntSize(mSurface->GetSize());
+}
+
+SurfaceFormat
+X11TextureSourceOGL::GetFormat() const {
+  gfxContentType type = mSurface->GetContentType();
+  return X11TextureSourceOGL::ContentTypeToSurfaceFormat(type);
+}
+
+void
+X11TextureSourceOGL::SetCompositor(Compositor* aCompositor)
+{
+  MOZ_ASSERT(aCompositor->GetBackendType() == LayersBackend::LAYERS_OPENGL);
+  mCompositor = static_cast<CompositorOGL*>(aCompositor);
+}
+
+gl::GLContext*
+X11TextureSourceOGL::gl() const
+{
+  return mCompositor ? mCompositor->gl() : nullptr;
+}
+
+SurfaceFormat
+X11TextureSourceOGL::ContentTypeToSurfaceFormat(gfxContentType aType)
+{
+  // X11 uses a switched format and the OGL compositor
+  // doesn't support ALPHA / A8.
+  switch (aType) {
+    case gfxContentType::COLOR:
+      return SurfaceFormat::R8G8B8X8;
+    case gfxContentType::COLOR_ALPHA:
+      return SurfaceFormat::R8G8B8A8;
+    default:
+      return SurfaceFormat::UNKNOWN;
+  }
+}
+
+#endif