f4334277
 Hu Chunming
提交3rdparty
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#include <iostream>
#ifdef _WIN32
#define WIN32_LEAN_AND_MEAN 1
#define NOMINMAX 1
#include <windows.h>
#endif
#if defined(__APPLE__)
#include <OpenGL/gl.h>
#include <OpenGL/glu.h>
#else
#include <GL/gl.h>
#include <GL/glu.h>
#endif
#include "opencv2/core.hpp"
#include "opencv2/core/opengl.hpp"
#include "opencv2/core/cuda.hpp"
#include "opencv2/highgui.hpp"
using namespace std;
using namespace cv;
using namespace cv::cuda;
const int win_width = 800;
const int win_height = 640;
struct DrawData
{
ogl::Arrays arr;
ogl::Texture2D tex;
ogl::Buffer indices;
};
void draw(void* userdata);
void draw(void* userdata)
{
DrawData* data = static_cast<DrawData*>(userdata);
glRotated(0.6, 0, 1, 0);
ogl::render(data->arr, data->indices, ogl::TRIANGLES);
}
int main(int argc, char* argv[])
{
string filename;
if (argc < 2)
{
cout << "Usage: " << argv[0] << " image" << endl;
filename = "../data/lena.jpg";
}
else
filename = argv[1];
Mat img = imread(filename);
if (img.empty())
{
cerr << "Can't open image " << filename << endl;
return -1;
}
namedWindow("OpenGL", WINDOW_OPENGL);
resizeWindow("OpenGL", win_width, win_height);
Mat_<Vec2f> vertex(1, 4);
vertex << Vec2f(-1, 1), Vec2f(-1, -1), Vec2f(1, -1), Vec2f(1, 1);
Mat_<Vec2f> texCoords(1, 4);
texCoords << Vec2f(0, 0), Vec2f(0, 1), Vec2f(1, 1), Vec2f(1, 0);
Mat_<int> indices(1, 6);
indices << 0, 1, 2, 2, 3, 0;
DrawData data;
data.arr.setVertexArray(vertex);
data.arr.setTexCoordArray(texCoords);
data.indices.copyFrom(indices);
data.tex.copyFrom(img);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluPerspective(45.0, (double)win_width / win_height, 0.1, 100.0);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
gluLookAt(0, 0, 3, 0, 0, 0, 0, 1, 0);
glEnable(GL_TEXTURE_2D);
data.tex.bind();
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexEnvi(GL_TEXTURE_2D, GL_TEXTURE_ENV_MODE, GL_REPLACE);
glDisable(GL_CULL_FACE);
setOpenGlDrawCallback("OpenGL", draw, &data);
for (;;)
{
updateWindow("OpenGL");
char key = (char)waitKey(40);
if (key == 27)
break;
}
setOpenGlDrawCallback("OpenGL", 0, 0);
destroyAllWindows();
return 0;
}
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