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Diffstat (limited to 'tests/OffscreenContextWGL.cc')
| -rw-r--r-- | tests/OffscreenContextWGL.cc | 247 |
1 files changed, 0 insertions, 247 deletions
diff --git a/tests/OffscreenContextWGL.cc b/tests/OffscreenContextWGL.cc deleted file mode 100644 index 75a7ed2..0000000 --- a/tests/OffscreenContextWGL.cc +++ /dev/null @@ -1,247 +0,0 @@ -/* - -Create an OpenGL context without creating an OpenGL Window. for Windows. - -For more info: - - http://www.nullterminator.net/opengl32.html by Blaine Hodge - http://msdn.microsoft.com/en-us/library/ee418815(v=vs.85).aspx - http://www.cprogramming.com/tutorial/wgl_wiggle_functions.html by RoD - ( which includes robot.cc by Steven Billington ) - http://blogs.msdn.com/b/oldnewthing/archive/2006/12/04/1205831.aspx by Tom -*/ - -#include <windows.h> -#include <vector> - -#include "OffscreenContext.h" -#include "printutils.h" -#include "imageutils.h" -#include "system-gl.h" -#include "fbo.h" - -#include <GL/gl.h> // must be included after glew.h - -#include <map> -#include <string> -#include <sstream> - -using namespace std; - -struct OffscreenContext -{ - HWND window; - HDC dev_context; - HGLRC openGLContext; - int width; - int height; - fbo_t *fbo; -}; - -void offscreen_context_init(OffscreenContext &ctx, int width, int height) -{ - ctx.window = (HWND)NULL; - ctx.dev_context = (HDC)NULL; - ctx.openGLContext = (HGLRC)NULL; - ctx.width = width; - ctx.height = height; - ctx.fbo = NULL; -} - -string get_os_info() -{ - OSVERSIONINFO osvi; - - ZeroMemory(&osvi, sizeof(OSVERSIONINFO)); - osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFO); - GetVersionEx(&osvi); - - SYSTEM_INFO si; - GetSystemInfo(&si); - map<WORD,const char*> archs; - archs[PROCESSOR_ARCHITECTURE_AMD64] = "amd64"; - archs[PROCESSOR_ARCHITECTURE_IA64] = "itanium"; - archs[PROCESSOR_ARCHITECTURE_INTEL] = "x86"; - archs[PROCESSOR_ARCHITECTURE_UNKNOWN] = "unknown"; - - stringstream out; - out << "OS info: " - << "Microsoft(TM) Windows(TM) " << osvi.dwMajorVersion << " " - << osvi.dwMinorVersion << " " << osvi.dwBuildNumber << " " - << osvi.szCSDVersion; - if (archs.find(si.wProcessorArchitecture) != archs.end()) - out << " " << archs[si.wProcessorArchitecture]; - out << "\n"; - - out << "Machine: " << si.dwProcessorType; - - return out.str(); -} - -string offscreen_context_getinfo(OffscreenContext *ctx) -{ - stringstream out; - out << "GL context creator: WGL\n" - << "PNG generator: lodepng\n" - << get_os_info(); - return out.str(); -} - -LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wparam, LPARAM lparam) -{ - return DefWindowProc( hwnd, message, wparam, lparam ); -} - -bool create_wgl_dummy_context(OffscreenContext &ctx) -{ - // this function alters ctx->window and ctx->openGLContext - // and ctx->dev_context if successfull - - // create window - - HINSTANCE inst = GetModuleHandle(0); - WNDCLASS wc; - ZeroMemory( &wc, sizeof( wc ) ); - wc.style = CS_OWNDC; - wc.lpfnWndProc = WndProc; - wc.hInstance = inst; - wc.lpszClassName = (LPCWSTR)"OpenSCAD"; - RegisterClass( &wc ); - - HWND window = CreateWindow( (LPCWSTR)"OpenSCAD", (LPCWSTR)"OpenSCAD", - WS_CAPTION | WS_POPUPWINDOW, //| WS_VISIBLE, - 0, 0, ctx.width, ctx.height, NULL, NULL, inst, NULL ); - - if ( window==NULL ) { - cerr << "MS GDI - CreateWindow failed\n"; - return false; - } - - // create WGL context, make current - - PIXELFORMATDESCRIPTOR pixformat; - int chosenformat; - HDC dev_context = GetDC( window ); - if ( dev_context == NULL ) { - cerr << "MS GDI - GetDC failed\n"; - return false; - } - - ZeroMemory( &pixformat, sizeof( pixformat ) ); - pixformat.nSize = sizeof( pixformat ); - pixformat.nVersion = 1; - pixformat.dwFlags = PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER; - pixformat.iPixelType = PFD_TYPE_RGBA; - pixformat.cGreenBits = 8; - pixformat.cRedBits = 8; - pixformat.cBlueBits = 8; - pixformat.cAlphaBits = 8; - pixformat.cDepthBits = 24; - pixformat.cStencilBits = 8; - - chosenformat = ChoosePixelFormat( dev_context, &pixformat ); - if (chosenformat==0) { - cerr << "MS GDI - ChoosePixelFormat failed\n"; - return false; - } - - bool spfok = SetPixelFormat( dev_context, chosenformat, &pixformat ); - if (!spfok) { - cerr << "MS GDI - SetPixelFormat failed\n"; - return false; - } - - HGLRC gl_render_context = wglCreateContext( dev_context ); - if ( gl_render_context == NULL ) { - cerr << "MS WGL - wglCreateContext failed\n"; - ReleaseDC( ctx.window, ctx.dev_context ); - return false; - } - - bool mcok = wglMakeCurrent( dev_context, gl_render_context ); - if (!mcok) { - cerr << "MS WGL - wglMakeCurrent failed\n"; - return false; - } - - ctx.window = window; - ctx.dev_context = dev_context; - ctx.openGLContext = gl_render_context; - - return true; -} - - -OffscreenContext *create_offscreen_context(int w, int h) -{ - OffscreenContext *ctx = new OffscreenContext; - offscreen_context_init( *ctx, w, h ); - - // Before an FBO can be setup, a WGL context must be created. - // This call alters ctx->window and ctx->openGLContext - // and ctx->dev_context if successfull - if (!create_wgl_dummy_context( *ctx )) { - return NULL; - } - - GLenum err = glewInit(); // must come after Context creation and before FBO calls. - if (GLEW_OK != err) { - cerr << "Unable to init GLEW: " << glewGetErrorString(err) << "\n"; - return NULL; - } - //cerr << glew_dump(0); - - ctx->fbo = fbo_new(); - if (!fbo_init(ctx->fbo, w, h)) { - return NULL; - } - - return ctx; -} - -bool teardown_offscreen_context(OffscreenContext *ctx) -{ - if (ctx) { - fbo_unbind(ctx->fbo); - fbo_delete(ctx->fbo); - - wglMakeCurrent( NULL, NULL ); - wglDeleteContext( ctx->openGLContext ); - ReleaseDC( ctx->window, ctx->dev_context ); - - return true; - } - return false; -} - -/*! - Capture framebuffer from OpenGL and write it to the given filename as PNG. -*/ -bool save_framebuffer(OffscreenContext *ctx, const char *filename) -{ - wglSwapLayerBuffers( ctx->dev_context, WGL_SWAP_MAIN_PLANE ); - if (!ctx || !filename) return false; - int samplesPerPixel = 4; // R, G, B and A - vector<GLubyte> pixels(ctx->width * ctx->height * samplesPerPixel); - glReadPixels(0, 0, ctx->width, ctx->height, GL_RGBA, GL_UNSIGNED_BYTE, &pixels[0]); - - // Flip it vertically - images read from OpenGL buffers are upside-down - int rowBytes = samplesPerPixel * ctx->width; - unsigned char *flippedBuffer = (unsigned char *)malloc(rowBytes * ctx->height); - if (!flippedBuffer) { - std::cerr << "Unable to allocate flipped buffer for corrected image."; - return 1; - } - flip_image(&pixels[0], flippedBuffer, samplesPerPixel, ctx->width, ctx->height); - - bool writeok = write_png(filename, flippedBuffer, ctx->width, ctx->height); - - free(flippedBuffer); - - return writeok; -} - -void bind_offscreen_context(OffscreenContext *ctx) -{ - if (ctx) fbo_bind(ctx->fbo); -} |