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