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qt/LedOK/wProgramManager/wEditProgram/wElement/glyuvwidget.cpp

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提交 lekok
2022-01-04 18:11:48 +08:00
#include "glyuvwidget.h"
#include <QOpenGLShaderProgram>
#include <QOpenGLTexture>
#include <QDebug>
#include "globaldata.h"
#define ATTRIB_VERTEX 0
#define ATTRIB_TEXTURE 1
// 顶点矩阵
static const GLfloat vertexVertices[] = {
-1.0f, -1.0f,
1.0f, -1.0f,
-1.0f, 1.0f,
1.0f, 1.0f,
};
//纹理矩阵
static const GLfloat textureVertices[] = {
0.0f, 1.0f,
1.0f, 1.0f,
0.0f, 0.0f,
1.0f, 0.0f,
};
glyuvwidget::glyuvwidget(QWidget *parent):
QOpenGLWidget(parent)
{
}
glyuvwidget::~glyuvwidget()
{
makeCurrent();
//vbo.destroy();
globalData::getInstance()->g_GLList.append(id_y);//回收纹理
globalData::getInstance()->g_GLList.append(id_u);
globalData::getInstance()->g_GLList.append(id_v);
m_pShaderProgram->disableAttributeArray(ATTRIB_VERTEX);
m_pShaderProgram->disableAttributeArray(ATTRIB_TEXTURE);
m_pShaderProgram->release();
m_pShaderProgram->removeAllShaders();
delete m_pShaderProgram;
m_pShaderProgram=NULL;
delete [] m_pBufYuv420p;
m_pBufYuv420p=NULL;
doneCurrent();
}
void glyuvwidget::slotShowYuv(uchar *ptr, uint width, uint height)
{
if(NULL == ptr){
//qDebug() << "-------PlayOneFrame inBuf==NULL";
return;
}
if(NULL == m_pBufYuv420p){//如果正在运行中改变摄像头的分辨率有可能导致内存不足而奔溃
// qDebug() << "-------new buf";
int bufSize = 1920*1080*1.5;
m_pBufYuv420p = new unsigned char[bufSize];
}
m_nVideoW = width;
m_nVideoH = height;
int bufSize = m_nVideoW * m_nVideoH * 1.5;
memcpy(m_pBufYuv420p,ptr, bufSize);
//m_pBufYuv420p = ptr;
update();
}
void glyuvwidget::initializeGL()
{
//初始化OpenGL函数
initializeOpenGLFunctions();
glEnable(GL_DEPTH_TEST);
glEnable(GL_TEXTURE_2D);
//创建着色器程序容器
m_pShaderProgram = new QOpenGLShaderProgram();
//将顶点着色器源码添加到程序容器
m_pShaderProgram->addShaderFromSourceCode(QOpenGLShader::Vertex,
"attribute vec4 vertexIn;"
"attribute vec2 textureIn;"
"varying vec2 textureOut;"
"void main(void) {"
"gl_Position = vertexIn;"
"textureOut = textureIn;}");
//将片段着色器添加到程序容器
m_pShaderProgram->addShaderFromSourceCode(QOpenGLShader::Fragment,
"varying lowp vec2 textureOut;"
"uniform sampler2D tex_y;"
"uniform sampler2D tex_u;"
"uniform sampler2D tex_v;"
"void main(void){"
"mediump vec3 yuv;"
"lowp vec3 rgb;"
"yuv.x = texture2D(tex_y, textureOut).r;"
"yuv.y = texture2D(tex_u, textureOut).r - 0.5;"
"yuv.z = texture2D(tex_v, textureOut).r - 0.5;"
"rgb = mat3( 1, 1, 1,"
"0, -0.39465, 2.03211,"
"1.13983, -0.58060, 0) * yuv;"
"gl_FragColor = vec4(rgb, 1);}" );
//绑定属性vertexIn到指定位置ATTRIB_VERTEX,该属性在顶点着色源码其中有声明
m_pShaderProgram->bindAttributeLocation("vertexIn", ATTRIB_VERTEX);
//绑定属性textureIn到指定位置ATTRIB_TEXTURE,该属性在顶点着色源码其中有声明
m_pShaderProgram->bindAttributeLocation("textureIn", ATTRIB_TEXTURE);
//链接所有所有添入到的着色器程序
m_pShaderProgram->link();
//激活所有链接
m_pShaderProgram->bind();
//读取着色器中的数据变量tex_y, tex_u, tex_v的位置,这些变量的声明可以在
//片段着色器源码中可以看到
textureUniformY = m_pShaderProgram->uniformLocation("tex_y");
textureUniformU = m_pShaderProgram->uniformLocation("tex_u");
textureUniformV = m_pShaderProgram->uniformLocation("tex_v");
//设置属性ATTRIB_VERTEX的顶点矩阵值以及格式
glVertexAttribPointer(ATTRIB_VERTEX, 2, GL_FLOAT, GL_FALSE, 0, vertexVertices);
glEnableVertexAttribArray(ATTRIB_VERTEX);
//设置属性ATTRIB_TEXTURE的纹理矩阵值以及格式
glVertexAttribPointer(ATTRIB_TEXTURE, 2, GL_FLOAT, GL_FALSE, 0, textureVertices);
glEnableVertexAttribArray(ATTRIB_TEXTURE);
if(globalData::getInstance()->g_GLList.size()==0)
{
glGenTextures(1,&id_y); //生成纹理
//qDebug()<< "生成纹理 "<<id_y;
}
else
{
id_y = globalData::getInstance()->g_GLList.first();
globalData::getInstance()->g_GLList.removeFirst();
// glDeleteTextures(1,&id_y);
}
glBindTexture(GL_TEXTURE_2D,id_y);//绑定纹理
glTexParameterf(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,(GLfloat)GL_LINEAR);//设置纹理参数
glTexParameterf(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,(GLfloat)GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_WRAP_S,GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_WRAP_T,GL_CLAMP_TO_EDGE);
if(globalData::getInstance()->g_GLList.size()==0)
{
glGenTextures(1,&id_u); //生成纹理
}
else
{
id_u = globalData::getInstance()->g_GLList.first();
globalData::getInstance()->g_GLList.removeFirst();
// glDeleteTextures(1,&id_u);
}
glBindTexture(GL_TEXTURE_2D, id_u);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, (GLfloat)GL_LINEAR);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, (GLfloat)GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
if(globalData::getInstance()->g_GLList.size()==0)
{
glGenTextures(1,&id_v); //生成纹理
}
else
{
id_v = globalData::getInstance()->g_GLList.first();
globalData::getInstance()->g_GLList.removeFirst();
// glDeleteTextures(1,&id_v);
}
glBindTexture(GL_TEXTURE_2D, id_v);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, (GLfloat)GL_LINEAR);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, (GLfloat)GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glClearColor(0.3f,0.3f,0.3f,0.0);//设置背景色
}
//void glyuvwidget::initializeGL()
//{
// initializeOpenGLFunctions();
// glEnable(GL_DEPTH_TEST);
// static const GLfloat vertices[]{
// //顶点坐标
// -1.0f,-1.0f,
// -1.0f,+1.0f,
// +1.0f,+1.0f,
// +1.0f,-1.0f,
// //纹理坐标
// 0.0f,1.0f,
// 0.0f,0.0f,
// 1.0f,0.0f,
// 1.0f,1.0f,
// };
// vbo.create();
// vbo.bind();
// vbo.allocate(vertices,sizeof(vertices));
// //顶点着色器
// QOpenGLShader *vshader = new QOpenGLShader(QOpenGLShader::Vertex,this);
// const char *vsrc =
// "attribute vec4 vertexIn; \
// attribute vec2 textureIn; \
// varying vec2 textureOut; \
// void main(void) \
// { \
// gl_Position = vertexIn; \
// textureOut = textureIn; \
// }";
// vshader->compileSourceCode(vsrc);
// //片元着色器
// QOpenGLShader *fshader = new QOpenGLShader(QOpenGLShader::Fragment,this);
// const char *fsrc = "varying vec2 textureOut; \
// uniform sampler2D tex_y; \
// uniform sampler2D tex_u; \
// uniform sampler2D tex_v; \
// void main(void) \
// { \
// vec3 yuv; \
// vec3 rgb; \
// yuv.x = texture2D(tex_y, textureOut).r; \
// yuv.y = texture2D(tex_u, textureOut).r - 0.5; \
// yuv.z = texture2D(tex_v, textureOut).r - 0.5; \
// rgb = mat3( 1, 1, 1, \
// 0, -0.39465, 2.03211, \
// 1.13983, -0.58060, 0) * yuv; \
// gl_FragColor = vec4(rgb, 1); \
// }";
// fshader->compileSourceCode(fsrc);
// program = new QOpenGLShaderProgram(this);
// program->addShader(vshader);
// program->addShader(fshader);
// program->bindAttributeLocation("vertexIn",VERTEXIN);
// program->bindAttributeLocation("textureIn",TEXTUREIN);
// program->link();
// program->bind();
// program->enableAttributeArray(VERTEXIN);
// program->enableAttributeArray(TEXTUREIN);
// program->setAttributeBuffer(VERTEXIN,GL_FLOAT,0,2,2*sizeof(GLfloat));
// program->setAttributeBuffer(TEXTUREIN,GL_FLOAT,8*sizeof(GLfloat),2,2*sizeof(GLfloat));
// textureUniformY = program->uniformLocation("tex_y");
// textureUniformU = program->uniformLocation("tex_u");
// textureUniformV = program->uniformLocation("tex_v");
// textureY = new QOpenGLTexture(QOpenGLTexture::Target2D);
// textureU = new QOpenGLTexture(QOpenGLTexture::Target2D);
// textureV = new QOpenGLTexture(QOpenGLTexture::Target2D);
// textureY->create();
// textureU->create();
// textureV->create();
// idY = textureY->textureId();
// idU = textureU->textureId();
// idV = textureV->textureId();
// // glClearColor(0.0,0.0,0.0,0.0);
// glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
// glClear(GL_COLOR_BUFFER_BIT);
//}
void glyuvwidget::resizeGL(int w, int h)
{
// 计算窗口横纵比
qreal aspect = qreal(w) / qreal(h ? h : 1);
// 设置近平面值 3.0, 远平面值 7.0, 视场45度
const qreal zNear = 3.0, zFar = 7.0, fov = 45.0;
// 重设投影
projection.setToIdentity();
// 设置透视投影
projection.perspective(fov, static_cast<float>(aspect), zNear, zFar);
}
void glyuvwidget::paintGL()
{
if(NULL != m_pBufYuv420p)
{
//清理屏幕
glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
//加载y数据纹理
glActiveTexture(GL_TEXTURE0);//激活纹理单元GL_TEXTURE0
glBindTexture(GL_TEXTURE_2D, id_y);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RED, m_nVideoW, m_nVideoH, 0, GL_RED, GL_UNSIGNED_BYTE, (char*)m_pBufYuv420p);//使用内存中m_pBufYuv420p数据创建真正的y数据纹理
//只能用0,1,2等表示纹理单元的索引，这是opengl不人性化的地方
//0对应纹理单元GL_TEXTURE0，1对应纹理单元GL_TEXTURE1，2对应纹理的单元GL_TEXTURE2
glUniform1i(textureUniformY, 0); //指定y纹理要使用新值
//加载u数据纹理
glActiveTexture(GL_TEXTURE1);//激活纹理单元GL_TEXTURE1
glBindTexture(GL_TEXTURE_2D, id_u);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RED, m_nVideoW/2, m_nVideoH/2, 0, GL_RED, GL_UNSIGNED_BYTE, (char*)m_pBufYuv420p+m_nVideoW*m_nVideoH);
glUniform1i(textureUniformU, 1);//指定u纹理要使用新值
//加载v数据纹理
glActiveTexture(GL_TEXTURE2);//激活纹理单元GL_TEXTURE2
glBindTexture(GL_TEXTURE_2D, id_v);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RED, m_nVideoW/2, m_nVideoH/2, 0, GL_RED, GL_UNSIGNED_BYTE, (char*)m_pBufYuv420p+m_nVideoW*m_nVideoH*5/4);
glUniform1i(textureUniformV, 2);//指定v纹理要使用新值
glDisable(GL_DEPTH_TEST);//should be put before glDrawArrays
//使用顶点数组方式绘制图形
glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
}
}
//void glyuvwidget::paintGL()
//{
//// QMatrix4x4 m;
//// m.perspective(60.0f, 4.0f/3.0f, 0.1f, 100.0f );//透视矩阵随距离的变化，图形跟着变化。屏幕平面中心就是视点（摄像头）,需要将图形移向屏幕里面一定距离。
//// m.ortho(-2,+2,-2,+2,-10,10);//近裁剪平面是一个矩形,矩形左下角点三维空间坐标是（left,bottom,-near）,右上角点是（right,top,-near）所以此处为负，表示z轴最大为10；
// //远裁剪平面也是一个矩形,左下角点空间坐标是（left,bottom,-far）,右上角点是（right,top,-far）所以此处为正，表示z轴最小为-10；
// //此时坐标中心还是在屏幕水平面中间，只是前后左右的距离已限制。
// //清理屏幕
// glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
// glActiveTexture(GL_TEXTURE0); //激活纹理单元GL_TEXTURE0,系统里面的
// glBindTexture(GL_TEXTURE_2D,idY); //绑定y分量纹理对象id到激活的纹理单元
// //使用内存中的数据创建真正的y分量纹理数据
// glTexImage2D(GL_TEXTURE_2D,0,GL_RED,videoW,videoH,0,GL_RED,GL_UNSIGNED_BYTE,yuvPtr);
// //https://blog.csdn.net/xipiaoyouzi/article/details/53584798 纹理参数解析
// glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR);
// glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR);
// glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
// glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
// glActiveTexture(GL_TEXTURE1); //激活纹理单元GL_TEXTURE1
// glBindTexture(GL_TEXTURE_2D,idU);
// //使用内存中的数据创建真正的u分量纹理数据
// glTexImage2D(GL_TEXTURE_2D,0,GL_RED,videoW >> 1, videoH >> 1,0,GL_RED,GL_UNSIGNED_BYTE,yuvPtr + videoW * videoH);
// glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR);
// glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR);
// glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
// glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
// glActiveTexture(GL_TEXTURE2); //激活纹理单元GL_TEXTURE2
// glBindTexture(GL_TEXTURE_2D,idV);
// //使用内存中的数据创建真正的v分量纹理数据
// glTexImage2D(GL_TEXTURE_2D, 0, GL_RED, videoW >> 1, videoH >> 1, 0, GL_RED, GL_UNSIGNED_BYTE, yuvPtr+videoW*videoH*5/4);
// glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR);
// glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR);
// glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
// glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
// //指定y纹理要使用新值
// glUniform1i(textureUniformY, 0);
// //指定u纹理要使用新值
// glUniform1i(textureUniformU, 1);
// //指定v纹理要使用新值
// glUniform1i(textureUniformV, 2);
// //使用顶点数组方式绘制图形
// glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
//}
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