1 files changed, 103 insertions, 0 deletions
diff --git a/services/surfaceflinger/LayerDim.cpp b/services/surfaceflinger/LayerDim.cpp
new file mode 100644
index 000000000000..a1f339e488be
--- /dev/null
+++ b/services/surfaceflinger/LayerDim.cpp
@@ -0,0 +1,103 @@
+/*
+ * Copyright (C) 2007 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <stdlib.h>
+#include <stdint.h>
+#include <sys/types.h>
+
+#include <utils/Errors.h>
+#include <utils/Log.h>
+
+#include <ui/GraphicBuffer.h>
+
+#include "LayerDim.h"
+#include "SurfaceFlinger.h"
+#include "DisplayHardware/DisplayHardware.h"
+
+namespace android {
+// ---------------------------------------------------------------------------
+
+bool LayerDim::sUseTexture;
+GLuint LayerDim::sTexId;
+EGLImageKHR LayerDim::sImage;
+int32_t LayerDim::sWidth;
+int32_t LayerDim::sHeight;
+
+// ---------------------------------------------------------------------------
+
+LayerDim::LayerDim(SurfaceFlinger* flinger, DisplayID display,
+        const sp<Client>& client)
+    : LayerBaseClient(flinger, display, client)
+{
+}
+
+void LayerDim::initDimmer(SurfaceFlinger* flinger, uint32_t w, uint32_t h)
+{
+    sTexId = -1;
+    sImage = EGL_NO_IMAGE_KHR;
+    sWidth = w;
+    sHeight = h;
+    sUseTexture = false;
+}
+
+LayerDim::~LayerDim()
+{
+}
+
+void LayerDim::onDraw(const Region& clip) const
+{
+    const State& s(drawingState());
+    Region::const_iterator it = clip.begin();
+    Region::const_iterator const end = clip.end();
+    if (s.alpha>0 && (it != end)) {
+        const DisplayHardware& hw(graphicPlane(0).displayHardware());
+        const GLfloat alpha = s.alpha/255.0f;
+        const uint32_t fbHeight = hw.getHeight();
+        glDisable(GL_DITHER);
+        glEnable(GL_BLEND);
+        glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
+        glColor4f(0, 0, 0, alpha);
+
+#if defined(GL_OES_texture_external)
+        if (GLExtensions::getInstance().haveTextureExternal()) {
+            glDisable(GL_TEXTURE_EXTERNAL_OES);
+        }
+#endif
+        glDisable(GL_TEXTURE_2D);
+
+        GLshort w = sWidth;
+        GLshort h = sHeight;
+        const GLshort vertices[4][2] = {
+                { 0, 0 },
+                { 0, h },
+                { w, h },
+                { w, 0 }
+        };
+        glVertexPointer(2, GL_SHORT, 0, vertices);
+
+        while (it != end) {
+            const Rect& r = *it++;
+            const GLint sy = fbHeight - (r.top + r.height());
+            glScissor(r.left, sy, r.width(), r.height());
+            glDrawArrays(GL_TRIANGLE_FAN, 0, 4); 
+        }
+    }
+    glDisableClientState(GL_TEXTURE_COORD_ARRAY);
+}
+
+// ---------------------------------------------------------------------------
+
+}; // namespace android