mirror of
https://github.com/opencv/opencv.git
synced 2024-12-21 13:48:04 +08:00
118 lines
2.4 KiB
C++
118 lines
2.4 KiB
C++
#include <iostream>
|
|
|
|
#ifdef WIN32
|
|
#define WIN32_LEAN_AND_MEAN 1
|
|
#define NOMINMAX 1
|
|
#include <windows.h>
|
|
#endif
|
|
#if defined(_WIN64)
|
|
#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;
|
|
}
|