/* * 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 { // --------------------------------------------------------------------------- LayerDim::LayerDim(SurfaceFlinger* flinger, DisplayID display, const sp<Client>& client) : LayerBaseClient(flinger, display, client) { } 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); if (s.alpha == 0xFF) { glDisable(GL_BLEND); } else { glEnable(GL_BLEND); glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA); } glColor4f(0, 0, 0, alpha); #if defined(GL_OES_EGL_image_external) if (GLExtensions::getInstance().haveTextureExternal()) { glDisable(GL_TEXTURE_EXTERNAL_OES); } #endif glDisable(GL_TEXTURE_2D); glVertexPointer(2, GL_FLOAT, 0, mVertices); 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