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/*
* 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
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