mirror of
https://github.com/opencv/opencv.git
synced 2024-12-14 00:39:13 +08:00
6cf0910842
* cmake: Fix DirectX detection in mingw The pragma comment directive is valid for MSVC only. So, the DirectX detection fails in mingw. The failure is fixed by adding the required linking library (here d3d11) in the try_compile() function in OpenCVDetectDirectX.cmake file. Also add a message if the first DirectX check fails. * gapi: Fix compilation with mingw These changes remove MSVC specific pragma directive. The compilation fails at linking time due to absence of proper linking library. The required libraries are added in corresponding CMakeLists.txt file. * samples: Fix compilation with mingw These changes remove MSVC specific pragma directive. The compilation fails at linking time due to absence of proper linking library. The required libraries are added in corresponding CMakeLists.txt file.
528 lines
14 KiB
C++
528 lines
14 KiB
C++
/*
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// Sample demonstrating interoperability of OpenCV UMat with OpenGL texture.
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// At first, the data obtained from video file or camera and placed onto
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// OpenGL texture, following mapping of this OpenGL texture to OpenCV UMat
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// and call cv::Blur function. The result is mapped back to OpenGL texture
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// and rendered through OpenGL API.
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*/
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#if defined(_WIN32)
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# define WIN32_LEAN_AND_MEAN
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# include <windows.h>
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#elif defined(__linux__)
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# include <X11/X.h>
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# include <X11/Xlib.h>
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#endif
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#include <iostream>
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#include <queue>
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#include <string>
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#include <stdio.h>
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#include "opencv2/core.hpp"
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#include "opencv2/core/opengl.hpp"
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#include "opencv2/core/ocl.hpp"
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#include "opencv2/imgproc.hpp"
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#include "opencv2/videoio.hpp"
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#include "winapp.hpp"
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class GLWinApp : public WinApp
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{
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public:
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enum MODE
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{
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MODE_CPU = 0,
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MODE_GPU
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};
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GLWinApp(int width, int height, std::string& window_name, cv::VideoCapture& cap) :
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WinApp(width, height, window_name)
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{
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m_shutdown = false;
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m_use_buffer = false;
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m_demo_processing = true;
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m_mode = MODE_CPU;
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m_modeStr[0] = cv::String("Processing on CPU");
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m_modeStr[1] = cv::String("Processing on GPU");
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m_cap = cap;
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}
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~GLWinApp() {}
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virtual void cleanup() CV_OVERRIDE
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{
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m_shutdown = true;
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#if defined(__linux__)
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glXMakeCurrent(m_display, None, NULL);
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glXDestroyContext(m_display, m_glctx);
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#endif
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WinApp::cleanup();
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}
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#if defined(_WIN32)
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virtual LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam) CV_OVERRIDE
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{
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switch (message)
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{
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case WM_CHAR:
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if (wParam == '1')
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{
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set_mode(MODE_CPU);
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return EXIT_SUCCESS;
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}
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if (wParam == '2')
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{
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set_mode(MODE_GPU);
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return EXIT_SUCCESS;
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}
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else if (wParam == '9')
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{
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toggle_buffer();
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return EXIT_SUCCESS;
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}
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else if (wParam == VK_SPACE)
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{
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m_demo_processing = !m_demo_processing;
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return EXIT_SUCCESS;
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}
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else if (wParam == VK_ESCAPE)
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{
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cleanup();
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return EXIT_SUCCESS;
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}
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break;
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case WM_CLOSE:
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cleanup();
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return EXIT_SUCCESS;
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case WM_DESTROY:
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::PostQuitMessage(0);
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return EXIT_SUCCESS;
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}
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return ::DefWindowProc(hWnd, message, wParam, lParam);
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}
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#endif
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#if defined(__linux__)
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int handle_event(XEvent& e) CV_OVERRIDE
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{
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switch(e.type)
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{
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case ClientMessage:
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if ((Atom)e.xclient.data.l[0] == m_WM_DELETE_WINDOW)
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{
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m_end_loop = true;
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cleanup();
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}
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else
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{
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return EXIT_SUCCESS;
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}
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break;
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case Expose:
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render();
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break;
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case KeyPress:
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switch(keycode_to_keysym(e.xkey.keycode))
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{
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case XK_space:
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m_demo_processing = !m_demo_processing;
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break;
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case XK_1:
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set_mode(MODE_CPU);
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break;
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case XK_2:
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set_mode(MODE_GPU);
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break;
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case XK_9:
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toggle_buffer();
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break;
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case XK_Escape:
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m_end_loop = true;
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cleanup();
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break;
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}
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break;
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default:
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return EXIT_SUCCESS;
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}
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return 1;
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}
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#endif
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int init() CV_OVERRIDE
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{
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#if defined(_WIN32)
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m_hDC = GetDC(m_hWnd);
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if (setup_pixel_format() != 0)
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{
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std::cerr << "Can't setup pixel format" << std::endl;
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return EXIT_FAILURE;
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}
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m_hRC = wglCreateContext(m_hDC);
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wglMakeCurrent(m_hDC, m_hRC);
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#elif defined(__linux__)
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m_glctx = glXCreateContext(m_display, m_visual_info, NULL, GL_TRUE);
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glXMakeCurrent(m_display, m_window, m_glctx);
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#endif
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glEnable(GL_TEXTURE_2D);
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glEnable(GL_DEPTH_TEST);
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glViewport(0, 0, m_width, m_height);
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if (cv::ocl::haveOpenCL())
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{
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(void) cv::ogl::ocl::initializeContextFromGL();
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}
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m_oclDevName = cv::ocl::useOpenCL() ?
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cv::ocl::Context::getDefault().device(0).name() :
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(char*) "No OpenCL device";
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return EXIT_SUCCESS;
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} // init()
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int get_frame(cv::ogl::Texture2D& texture, cv::ogl::Buffer& buffer, bool do_buffer)
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{
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if (!m_cap.read(m_frame_bgr))
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return EXIT_FAILURE;
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cv::cvtColor(m_frame_bgr, m_frame_rgba, cv::COLOR_RGB2RGBA);
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if (do_buffer)
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buffer.copyFrom(m_frame_rgba, cv::ogl::Buffer::PIXEL_UNPACK_BUFFER, true);
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else
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texture.copyFrom(m_frame_rgba, true);
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return EXIT_SUCCESS;
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}
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void print_info(MODE mode, double time, cv::String& oclDevName)
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{
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#if defined(_WIN32)
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HDC hDC = m_hDC;
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HFONT hFont = (HFONT)::GetStockObject(SYSTEM_FONT);
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HFONT hOldFont = (HFONT)::SelectObject(hDC, hFont);
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if (hOldFont)
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{
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TEXTMETRIC tm;
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::GetTextMetrics(hDC, &tm);
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char buf[256+1];
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int y = 0;
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buf[0] = 0;
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sprintf_s(buf, sizeof(buf)-1, "Mode: %s OpenGL %s", m_modeStr[mode].c_str(), use_buffer() ? "buffer" : "texture");
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::TextOut(hDC, 0, y, buf, (int)strlen(buf));
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y += tm.tmHeight;
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buf[0] = 0;
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sprintf_s(buf, sizeof(buf)-1, "Time, msec: %2.1f", time);
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::TextOut(hDC, 0, y, buf, (int)strlen(buf));
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y += tm.tmHeight;
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buf[0] = 0;
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sprintf_s(buf, sizeof(buf)-1, "OpenCL device: %s", oclDevName.c_str());
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::TextOut(hDC, 0, y, buf, (int)strlen(buf));
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::SelectObject(hDC, hOldFont);
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}
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#elif defined(__linux__)
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char buf[256+1];
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snprintf(buf, sizeof(buf)-1, "Time, msec: %2.1f, Mode: %s OpenGL %s, Device: %s", time, m_modeStr[mode].c_str(), use_buffer() ? "buffer" : "texture", oclDevName.c_str());
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XStoreName(m_display, m_window, buf);
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#endif
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}
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void idle() CV_OVERRIDE
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{
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render();
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}
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int render() CV_OVERRIDE
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{
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try
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{
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if (m_shutdown)
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return EXIT_SUCCESS;
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int r;
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cv::ogl::Texture2D texture;
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cv::ogl::Buffer buffer;
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texture.setAutoRelease(true);
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buffer.setAutoRelease(true);
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MODE mode = get_mode();
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bool do_buffer = use_buffer();
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r = get_frame(texture, buffer, do_buffer);
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if (r != 0)
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{
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return EXIT_FAILURE;
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}
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switch (mode)
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{
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case MODE_CPU: // process frame on CPU
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processFrameCPU(texture, buffer, do_buffer);
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break;
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case MODE_GPU: // process frame on GPU
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processFrameGPU(texture, buffer, do_buffer);
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break;
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} // switch
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if (do_buffer) // buffer -> texture
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{
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cv::Mat m(m_height, m_width, CV_8UC4);
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buffer.copyTo(m);
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texture.copyFrom(m, true);
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}
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#if defined(__linux__)
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XWindowAttributes window_attributes;
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XGetWindowAttributes(m_display, m_window, &window_attributes);
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glViewport(0, 0, window_attributes.width, window_attributes.height);
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#endif
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glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
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glLoadIdentity();
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glEnable(GL_TEXTURE_2D);
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texture.bind();
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glBegin(GL_QUADS);
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glTexCoord2f(0.0f, 0.0f); glVertex3f(-1.0f, 1.0f, 0.1f);
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glTexCoord2f(0.0f, 1.0f); glVertex3f(-1.0f, -1.0f, 0.1f);
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glTexCoord2f(1.0f, 1.0f); glVertex3f(1.0f, -1.0f, 0.1f);
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glTexCoord2f(1.0f, 0.0f); glVertex3f(1.0f, 1.0f, 0.1f);
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glEnd();
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#if defined(_WIN32)
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SwapBuffers(m_hDC);
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#elif defined(__linux__)
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glXSwapBuffers(m_display, m_window);
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#endif
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print_info(mode, m_timer.getTimeMilli(), m_oclDevName);
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}
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catch (const cv::Exception& e)
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{
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std::cerr << "Exception: " << e.what() << std::endl;
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return 10;
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}
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return EXIT_SUCCESS;
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}
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protected:
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void processFrameCPU(cv::ogl::Texture2D& texture, cv::ogl::Buffer& buffer, bool do_buffer)
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{
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cv::Mat m(m_height, m_width, CV_8UC4);
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m_timer.reset();
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m_timer.start();
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if (do_buffer)
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buffer.copyTo(m);
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else
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texture.copyTo(m);
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if (m_demo_processing)
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{
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// blur texture image with OpenCV on CPU
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cv::blur(m, m, cv::Size(15, 15));
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}
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if (do_buffer)
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buffer.copyFrom(m, cv::ogl::Buffer::PIXEL_UNPACK_BUFFER, true);
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else
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texture.copyFrom(m, true);
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m_timer.stop();
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}
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void processFrameGPU(cv::ogl::Texture2D& texture, cv::ogl::Buffer& buffer, bool do_buffer)
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{
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cv::UMat u;
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m_timer.reset();
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m_timer.start();
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if (do_buffer)
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u = cv::ogl::mapGLBuffer(buffer);
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else
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cv::ogl::convertFromGLTexture2D(texture, u);
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if (m_demo_processing)
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{
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// blur texture image with OpenCV on GPU with OpenCL
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cv::blur(u, u, cv::Size(15, 15));
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}
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if (do_buffer)
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cv::ogl::unmapGLBuffer(u);
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else
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cv::ogl::convertToGLTexture2D(u, texture);
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m_timer.stop();
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}
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#if defined(_WIN32)
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int setup_pixel_format()
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{
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PIXELFORMATDESCRIPTOR pfd;
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pfd.nSize = sizeof(PIXELFORMATDESCRIPTOR);
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pfd.nVersion = 1;
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pfd.dwFlags = PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER;
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pfd.iPixelType = PFD_TYPE_RGBA;
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pfd.cColorBits = 24;
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pfd.cRedBits = 8;
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pfd.cRedShift = 0;
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pfd.cGreenBits = 8;
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pfd.cGreenShift = 0;
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pfd.cBlueBits = 8;
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pfd.cBlueShift = 0;
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pfd.cAlphaBits = 8;
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pfd.cAlphaShift = 0;
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pfd.cAccumBits = 0;
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pfd.cAccumRedBits = 0;
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pfd.cAccumGreenBits = 0;
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pfd.cAccumBlueBits = 0;
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pfd.cAccumAlphaBits = 0;
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pfd.cDepthBits = 24;
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pfd.cStencilBits = 8;
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pfd.cAuxBuffers = 0;
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pfd.iLayerType = PFD_MAIN_PLANE;
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pfd.bReserved = 0;
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pfd.dwLayerMask = 0;
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pfd.dwVisibleMask = 0;
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pfd.dwDamageMask = 0;
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int pfmt = ChoosePixelFormat(m_hDC, &pfd);
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if (pfmt == 0)
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return EXIT_FAILURE;
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if (SetPixelFormat(m_hDC, pfmt, &pfd) == 0)
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return -2;
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return EXIT_SUCCESS;
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}
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#endif
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#if defined(__linux__)
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KeySym keycode_to_keysym(unsigned keycode)
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{ // note that XKeycodeToKeysym() is considered deprecated
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int keysyms_per_keycode_return = 0;
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KeySym *keysyms = XGetKeyboardMapping(m_display, keycode, 1, &keysyms_per_keycode_return);
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KeySym keysym = keysyms[0];
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XFree(keysyms);
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return keysym;
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}
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#endif
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bool use_buffer() { return m_use_buffer; }
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void toggle_buffer() { m_use_buffer = !m_use_buffer; }
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MODE get_mode() { return m_mode; }
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void set_mode(MODE mode) { m_mode = mode; }
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private:
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bool m_shutdown;
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bool m_use_buffer;
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bool m_demo_processing;
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MODE m_mode;
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cv::String m_modeStr[2];
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#if defined(_WIN32)
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HDC m_hDC;
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HGLRC m_hRC;
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#elif defined(__linux__)
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GLXContext m_glctx;
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#endif
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cv::VideoCapture m_cap;
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cv::Mat m_frame_bgr;
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cv::Mat m_frame_rgba;
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cv::String m_oclDevName;
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};
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static const char* keys =
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{
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"{c camera | 0 | camera id }"
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"{f file | | movie file name }"
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};
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using namespace cv;
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using namespace std;
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int main(int argc, char** argv)
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{
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cv::CommandLineParser parser(argc, argv, keys);
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int camera_id = parser.get<int>("camera");
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string file = parser.get<string>("file");
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parser.about(
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"\nA sample program demonstrating interoperability of OpenGL and OpenCL with OpenCV.\n\n"
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"Hot keys: \n"
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" SPACE - turn processing on/off\n"
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" 1 - process GL data through OpenCV on CPU\n"
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" 2 - process GL data through OpenCV on GPU (via OpenCL)\n"
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" 9 - toggle use of GL texture/GL buffer\n"
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" ESC - exit\n\n");
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parser.printMessage();
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cv::VideoCapture cap;
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if (file.empty())
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cap.open(camera_id);
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else
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cap.open(file.c_str());
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if (!cap.isOpened())
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{
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printf("can not open camera or video file\n");
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return EXIT_FAILURE;
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}
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int width = (int)cap.get(CAP_PROP_FRAME_WIDTH);
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int height = (int)cap.get(CAP_PROP_FRAME_HEIGHT);
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#if defined(_WIN32)
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string wndname = "WGL Window";
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#elif defined(__linux__)
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string wndname = "GLX Window";
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#endif
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GLWinApp app(width, height, wndname, cap);
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try
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{
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app.create();
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return app.run();
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}
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catch (const cv::Exception& e)
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{
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cerr << "Exception: " << e.what() << endl;
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return 10;
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}
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catch (...)
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{
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cerr << "FATAL ERROR: Unknown exception" << endl;
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return 11;
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}
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}
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