diff options
Diffstat (limited to 'progs/wgl/wglthreads')
-rw-r--r-- | progs/wgl/wglthreads/wglthreads.c | 636 |
1 files changed, 0 insertions, 636 deletions
diff --git a/progs/wgl/wglthreads/wglthreads.c b/progs/wgl/wglthreads/wglthreads.c deleted file mode 100644 index 27dca10f2a0..00000000000 --- a/progs/wgl/wglthreads/wglthreads.c +++ /dev/null @@ -1,636 +0,0 @@ -/* - * Copyright (C) 2000 Brian Paul All Rights Reserved. - * - * Permission is hereby granted, free of charge, to any person obtaining a - * copy of this software and associated documentation files (the "Software"), - * to deal in the Software without restriction, including without limitation - * the rights to use, copy, modify, merge, publish, distribute, sublicense, - * and/or sell copies of the Software, and to permit persons to whom the - * Software is furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included - * in all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS - * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN - * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN - * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. - * - * - * Port to windows done by Michal Krol. - */ - - -/* - * This program tests WGL thread safety. - * Command line options: - * -h Print usage - * -l Enable application-side locking - * -n <num threads> Number of threads to create (default is 2) - * -t Use texture mapping - * -s Force single-threaded. - * - * Brian Paul 20 July 2000 - */ - - -/* - * Notes: - * - Each thread gets its own WGL context. - * - * - The WGL contexts share texture objects. - * - * - When 't' is pressed to update the texture image, the window/thread which - * has input focus is signalled to change the texture. The other threads - * should see the updated texture the next time they call glBindTexture. - */ - - -#include <assert.h> -#include <windows.h> -#include <GL/gl.h> -#include <math.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> - -#pragma comment(lib, "opengl32.lib") - - -/* - * Each window/thread/context: - */ -struct winthread { - int Index; - HANDLE Thread; - HWND Win; - HDC hDC; - HGLRC Context; - float Angle; - int WinWidth, WinHeight; - GLboolean NewSize; - HANDLE hEventInitialised; - GLboolean Initialized; - GLboolean MakeNewTexture; - HANDLE hEventRedraw; -}; - - -#define MAX_WINTHREADS 100 -static struct winthread WinThreads[MAX_WINTHREADS]; -static int NumWinThreads = 2; -static HANDLE ExitEvent = NULL; - -static GLboolean Locking = 0; -static GLboolean Texture = GL_FALSE; -static GLboolean SingleThreaded = GL_FALSE; -static GLuint TexObj = 12; -static GLboolean Animate = GL_TRUE; - -static CRITICAL_SECTION Mutex; - - -static void -Error(const char *msg) -{ - fprintf(stderr, "Error: %s\n", msg); - exit(1); -} - - -static void -signal_redraw(void) -{ - int i; - - for (i = 0; i < NumWinThreads; i++) { - SetEvent(WinThreads[i].hEventRedraw); - } -} - - -static void -MakeNewTexture(struct winthread *wt) -{ -#define TEX_SIZE 128 - static float step = 0.0f; - GLfloat image[TEX_SIZE][TEX_SIZE][4]; - GLint width; - int i, j; - - for (j = 0; j < TEX_SIZE; j++) { - for (i = 0; i < TEX_SIZE; i++) { - float dt = 5.0f * (j - 0.5f * TEX_SIZE) / TEX_SIZE; - float ds = 5.0f * (i - 0.5f * TEX_SIZE) / TEX_SIZE; - float r = dt * dt + ds * ds + step; - image[j][i][0] = - image[j][i][1] = - image[j][i][2] = 0.75f + 0.25f * (float) cos(r); - image[j][i][3] = 1.0f; - } - } - - step += 0.5; - - glBindTexture(GL_TEXTURE_2D, TexObj); - - glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_WIDTH, &width); - if (width) { - assert(width == TEX_SIZE); - /* sub-tex replace */ - glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, TEX_SIZE, TEX_SIZE, - GL_RGBA, GL_FLOAT, image); - } - else { - /* create new */ - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); - - glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, TEX_SIZE, TEX_SIZE, 0, - GL_RGBA, GL_FLOAT, image); - } -} - - - -/* draw a colored cube */ -static void -draw_object(void) -{ - glPushMatrix(); - glScalef(0.75f, 0.75f, 0.75f); - - glColor3f(1, 0, 0); - - if (Texture) { - glBindTexture(GL_TEXTURE_2D, TexObj); - glEnable(GL_TEXTURE_2D); - } - else { - glDisable(GL_TEXTURE_2D); - } - - glBegin(GL_QUADS); - - /* -X */ - glColor3f(0, 1, 1); - glTexCoord2f(0, 0); glVertex3f(-1, -1, -1); - glTexCoord2f(1, 0); glVertex3f(-1, 1, -1); - glTexCoord2f(1, 1); glVertex3f(-1, 1, 1); - glTexCoord2f(0, 1); glVertex3f(-1, -1, 1); - - /* +X */ - glColor3f(1, 0, 0); - glTexCoord2f(0, 0); glVertex3f(1, -1, -1); - glTexCoord2f(1, 0); glVertex3f(1, 1, -1); - glTexCoord2f(1, 1); glVertex3f(1, 1, 1); - glTexCoord2f(0, 1); glVertex3f(1, -1, 1); - - /* -Y */ - glColor3f(1, 0, 1); - glTexCoord2f(0, 0); glVertex3f(-1, -1, -1); - glTexCoord2f(1, 0); glVertex3f( 1, -1, -1); - glTexCoord2f(1, 1); glVertex3f( 1, -1, 1); - glTexCoord2f(0, 1); glVertex3f(-1, -1, 1); - - /* +Y */ - glColor3f(0, 1, 0); - glTexCoord2f(0, 0); glVertex3f(-1, 1, -1); - glTexCoord2f(1, 0); glVertex3f( 1, 1, -1); - glTexCoord2f(1, 1); glVertex3f( 1, 1, 1); - glTexCoord2f(0, 1); glVertex3f(-1, 1, 1); - - /* -Z */ - glColor3f(1, 1, 0); - glTexCoord2f(0, 0); glVertex3f(-1, -1, -1); - glTexCoord2f(1, 0); glVertex3f( 1, -1, -1); - glTexCoord2f(1, 1); glVertex3f( 1, 1, -1); - glTexCoord2f(0, 1); glVertex3f(-1, 1, -1); - - /* +Y */ - glColor3f(0, 0, 1); - glTexCoord2f(0, 0); glVertex3f(-1, -1, 1); - glTexCoord2f(1, 0); glVertex3f( 1, -1, 1); - glTexCoord2f(1, 1); glVertex3f( 1, 1, 1); - glTexCoord2f(0, 1); glVertex3f(-1, 1, 1); - - glEnd(); - - glPopMatrix(); -} - - -/* signal resize of given window */ -static void -resize(struct winthread *wt, int w, int h) -{ - wt->NewSize = GL_TRUE; - wt->WinWidth = w; - wt->WinHeight = h; - if (!Animate) - SetEvent(wt->hEventRedraw); -} - - -/* - * We have an instance of this for each thread. - */ -static void -draw_loop(struct winthread *wt) -{ - while (1) { - GLboolean draw = Animate; - MSG msg; - - if (Animate) { - /* wait 5 ms for signal either to exit or process messages */ - switch (MsgWaitForMultipleObjects(1, &ExitEvent, FALSE, 5, QS_ALLINPUT)) { - case WAIT_OBJECT_0: - SendMessage(wt->Win, WM_CLOSE, 0, 0); - break; - case WAIT_OBJECT_0 + 1: - break; - } - } - else { - HANDLE events[2]; - - events[0] = wt->hEventRedraw; - events[1] = ExitEvent; - - /* wait for signal either to draw, exit or process messages */ - switch (MsgWaitForMultipleObjects(2, events, FALSE, INFINITE, QS_ALLINPUT)) { - case WAIT_OBJECT_0: - draw = GL_TRUE; - break; - case WAIT_OBJECT_0 + 1: - SendMessage(wt->Win, WM_CLOSE, 0, 0); - break; - case WAIT_OBJECT_0 + 2: - break; - } - } - - while (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE)) { - if (msg.message == WM_QUIT) { - return; - } - TranslateMessage(&msg); - DispatchMessage(&msg); - } - - if (!draw) - continue; - - if (Locking) - EnterCriticalSection(&Mutex); - - wglMakeCurrent(wt->hDC, wt->Context); - - if (!wt->Initialized) { - printf("wglthreads: %d: GL_RENDERER = %s\n", wt->Index, - (char *) glGetString(GL_RENDERER)); - if (Texture /*&& wt->Index == 0*/) { - MakeNewTexture(wt); - } - wt->Initialized = GL_TRUE; - } - - if (Locking) - LeaveCriticalSection(&Mutex); - - glEnable(GL_DEPTH_TEST); - - if (wt->NewSize) { - GLfloat w = (float) wt->WinWidth / (float) wt->WinHeight; - glViewport(0, 0, wt->WinWidth, wt->WinHeight); - glMatrixMode(GL_PROJECTION); - glLoadIdentity(); - glFrustum(-w, w, -1.0, 1.0, 1.5, 10); - glMatrixMode(GL_MODELVIEW); - glLoadIdentity(); - glTranslatef(0, 0, -2.5); - wt->NewSize = GL_FALSE; - } - - if (wt->MakeNewTexture) { - MakeNewTexture(wt); - wt->MakeNewTexture = GL_FALSE; - } - - glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); - - glPushMatrix(); - glRotatef(wt->Angle, 0, 1, 0); - glRotatef(wt->Angle, 1, 0, 0); - glScalef(0.7f, 0.7f, 0.7f); - draw_object(); - glPopMatrix(); - - if (Locking) - EnterCriticalSection(&Mutex); - - SwapBuffers(wt->hDC); - - if (Locking) - LeaveCriticalSection(&Mutex); - - wt->Angle += 1.0; - } -} - - -static void -keypress(WPARAM keySym, struct winthread *wt) -{ - switch (keySym) { - case VK_ESCAPE: - /* tell all threads to exit */ - SetEvent(ExitEvent); - /*printf("exit draw_loop %d\n", wt->Index);*/ - return; - case 't': - case 'T': - if (Texture) { - wt->MakeNewTexture = GL_TRUE; - if (!Animate) - signal_redraw(); - } - break; - case 'a': - case 'A': - Animate = !Animate; - if (Animate) - signal_redraw(); - break; - case 's': - case 'S': - if (!Animate) - signal_redraw(); - break; - default: - ; /* nop */ - } -} - - -static LRESULT CALLBACK -WndProc(HWND hWnd, - UINT uMsg, - WPARAM wParam, - LPARAM lParam ) -{ - int i; - - switch (uMsg) { - case WM_KEYDOWN: - for (i = 0; i < NumWinThreads; i++) { - struct winthread *wt = &WinThreads[i]; - - if (hWnd == wt->Win) { - keypress(wParam, wt); - break; - } - } - break; - case WM_SIZE: - for (i = 0; i < NumWinThreads; i++) { - struct winthread *wt = &WinThreads[i]; - - if (hWnd == wt->Win) { - RECT r; - - GetClientRect(hWnd, &r); - resize(wt, r.right, r.bottom); - break; - } - } - break; - case WM_DESTROY: - PostQuitMessage(0); - break; - default: - return DefWindowProc(hWnd, uMsg, wParam, lParam); - } - - return 0; -} - -/* - * we'll call this once for each thread, before the threads are created. - */ -static void -create_window(struct winthread *wt, HGLRC shareCtx) -{ - WNDCLASS wc = {0}; - int width = 160, height = 160; - int xpos = (wt->Index % 8) * (width + 10); - int ypos = (wt->Index / 8) * (width + 20); - HWND win; - HDC hdc; - PIXELFORMATDESCRIPTOR pfd = {0}; - int visinfo; - HGLRC ctx; - - wc.hbrBackground = (HBRUSH) (COLOR_BTNFACE + 1); - wc.hCursor = LoadCursor(NULL, IDC_ARROW); - wc.hIcon = LoadIcon(NULL, IDI_APPLICATION); - wc.lpfnWndProc = WndProc; - wc.lpszClassName = "wglthreads"; - wc.style = CS_OWNDC | CS_HREDRAW | CS_VREDRAW; - RegisterClass(&wc); - - win = CreateWindowEx(0, - wc.lpszClassName, - "wglthreads", - WS_VISIBLE | WS_CLIPSIBLINGS | WS_CLIPCHILDREN | WS_TILEDWINDOW, - xpos, - ypos, - width, - height, - NULL, - NULL, - wc.hInstance, - (LPVOID) wt); - if (!win) { - Error("Couldn't create window"); - } - - hdc = GetDC(win); - if (!hdc) { - Error("Couldn't obtain HDC"); - } - - pfd.cColorBits = 24; - pfd.cDepthBits = 24; - pfd.dwFlags = PFD_DOUBLEBUFFER | PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL; - pfd.iLayerType = PFD_MAIN_PLANE; - pfd.iPixelType = PFD_TYPE_RGBA; - pfd.nSize = sizeof(pfd); - pfd.nVersion = 1; - - visinfo = ChoosePixelFormat(hdc, &pfd); - if (!visinfo) { - Error("Unable to find RGB, Z, double-buffered visual"); - } - - SetPixelFormat(hdc, visinfo, &pfd); - ctx = wglCreateContext(hdc); - if (!ctx) { - Error("Couldn't create WGL context"); - } - - if (shareCtx) { - if(!wglShareLists(shareCtx, ctx)) - Error("Couldn't share WGL context lists"); - } - - /* save the info for this window/context */ - wt->Win = win; - wt->hDC = hdc; - wt->Context = ctx; - wt->Angle = 0.0; - wt->WinWidth = width; - wt->WinHeight = height; - wt->NewSize = GL_TRUE; -} - - -/* - * Called by pthread_create() - */ -static DWORD WINAPI -ThreadProc(void *p) -{ - struct winthread *wt = (struct winthread *) p; - HGLRC share; - - /* Wait for the previous thread */ - if(Texture && wt->Index > 0) { - WaitForSingleObject(WinThreads[wt->Index - 1].hEventInitialised, INFINITE); - share = WinThreads[0].Context; - } - else - share = 0; - - share = (Texture && wt->Index > 0) ? WinThreads[0].Context : 0; - create_window(wt, share); - SetEvent(wt->hEventInitialised); - - /* Wait for all threads to initialize otherwise wglShareLists will fail */ - if(wt->Index < NumWinThreads - 1) - WaitForSingleObject(WinThreads[NumWinThreads - 1].hEventInitialised, INFINITE); - - draw_loop(wt); - return 0; -} - - -static void -usage(void) -{ - printf("wglthreads: test of GL thread safety (any key = exit)\n"); - printf("Usage:\n"); - printf(" wglthreads [options]\n"); - printf("Options:\n"); - printf(" -h Show this usage screen\n"); - printf(" -n NUMTHREADS Number of threads to create\n"); - printf(" -l Use application-side locking\n"); - printf(" -t Enable texturing\n"); - printf(" -s Force single-threaded\n"); - printf("Keyboard:\n"); - printf(" Esc Exit\n"); - printf(" t Change texture image (requires -t option)\n"); - printf(" a Toggle animation\n"); - printf(" s Step rotation (when not animating)\n"); -} - - -int -main(int argc, char *argv[]) -{ - int i; - - for (i = 1; i < argc; i++) { - if (strcmp(argv[i], "-h") == 0) { - usage(); - exit(0); - } - else if (strcmp(argv[i], "-l") == 0) { - Locking = 1; - } - else if (strcmp(argv[i], "-t") == 0) { - Texture = 1; - } - else if (strcmp(argv[i], "-n") == 0 && i + 1 < argc) { - NumWinThreads = atoi(argv[i + 1]); - if (NumWinThreads < 1) - NumWinThreads = 1; - else if (NumWinThreads > MAX_WINTHREADS) - NumWinThreads = MAX_WINTHREADS; - i++; - } - else if (strcmp(argv[i], "-s") == 0) { - SingleThreaded = GL_TRUE; - } - else { - usage(); - exit(1); - } - } - - if (SingleThreaded) - printf("wglthreads: Forcing single-threaded, no other threads will be created.\n"); - - if (Locking) - printf("wglthreads: Using explicit locks around WGL calls.\n"); - else - printf("wglthreads: No explict locking.\n"); - - InitializeCriticalSection(&Mutex); - ExitEvent = CreateEvent(NULL, TRUE, FALSE, NULL); - - if (SingleThreaded) { - NumWinThreads = 1; - - WinThreads[0].Index = 0; - WinThreads[0].hEventInitialised = CreateEvent(NULL, TRUE, FALSE, NULL); - WinThreads[0].hEventRedraw = CreateEvent(NULL, FALSE, FALSE, NULL); - - ThreadProc((void*) &WinThreads[0]); - } - else { - HANDLE threads[MAX_WINTHREADS]; - - printf("wglthreads: creating threads\n"); - - /* Create the events */ - for (i = 0; i < NumWinThreads; i++) { - WinThreads[i].Index = i; - WinThreads[i].hEventInitialised = CreateEvent(NULL, TRUE, FALSE, NULL); - WinThreads[i].hEventRedraw = CreateEvent(NULL, FALSE, FALSE, NULL); - } - - /* Create the threads */ - for (i = 0; i < NumWinThreads; i++) { - DWORD id; - - WinThreads[i].Thread = CreateThread(NULL, - 0, - ThreadProc, - (void*) &WinThreads[i], - 0, - &id); - printf("wglthreads: Created thread %p\n", (void *) WinThreads[i].Thread); - - threads[i] = WinThreads[i].Thread; - } - - /* Wait for all threads to finish. */ - WaitForMultipleObjects(NumWinThreads, threads, TRUE, INFINITE); - } - - return 0; -} |