updated OpenGL functionality:

* removed OpenGLFuncTab, now extensions are loaded internally * added support of GlBuffer and GlTexture2D to InputArray/OutputArray * added ELEMENT_ARRAY_BUFFER and PIXEL_PACK_BUFFER targets * added copyFrom/copyTo method for GlBuffer and GlTexture2D * removed GlFont * removed pointCloudShow * removed OpenGLCleanCallback * added Access parameter to GlBuffer::mapHost * added autoRelease parameter to all create methods
2013-02-19 14:13:11 +04:00
parent 39baa2237e
commit e06c3ec7c5
21 changed files with 5875 additions and 2960 deletions
--- a/samples/gpu/opengl.cpp
+++ b/samples/gpu/opengl.cpp
@@ -0,0 +1,125 @@
+#include <iostream>
+#include "cvconfig.h"
+
+#ifndef HAVE_OPENGL
+int main()
+{
+    std::cerr << "Library was built without OpenGL support" << std::endl;
+    return -1;
+}
+#else
+
+#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/core.hpp"
+#include "opencv2/core/opengl_interop.hpp"
+#include "opencv2/core/gpumat.hpp"
+#include "opencv2/highgui/highgui.hpp"
+
+using namespace std;
+using namespace cv;
+using namespace cv::gpu;
+
+const int win_width = 800;
+const int win_height = 640;
+
+struct DrawData
+{
+    GlArrays arr;
+    GlTexture tex;
+    GlBuffer indices;
+};
+
+void CV_CDECL draw(void* userdata);
+
+void CV_CDECL draw(void* userdata)
+{
+    static double angle = 0.0;
+
+    DrawData* data = static_cast<DrawData*>(userdata);
+
+    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);
+    glRotated(angle, 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);
+
+    render(data->arr, data->indices, RenderMode::TRIANGLES);
+
+    angle += 0.3;
+}
+
+int main(int argc, char* argv[])
+{
+    if (argc < 2)
+    {
+        cout << "Usage: " << argv[0] << " image" << endl;
+        return -1;
+    }
+
+    Mat img = imread(argv[1]);
+    if (img.empty())
+    {
+        cerr << "Can't open image " << argv[1] << 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);
+
+    setOpenGlDrawCallback("OpenGL", draw, &data);
+
+    for (;;)
+    {
+        updateWindow("OpenGL");
+        int key = waitKey(10);
+        if ((key & 0xff) == 27)
+            break;
+    }
+
+    setOpenGlDrawCallback("OpenGL", 0, 0);
+    destroyAllWindows();
+
+    return 0;
+}
+
+#endif