From: Ralf Jung Date: Fri, 27 Sep 2013 11:02:59 +0000 (+0200) Subject: add a utility function to print a message to stderr and then quit X-Git-Url: https://git.ralfj.de/gltest.git/commitdiff_plain/867982470c8f197aaa6364da1c52d530a2023dec add a utility function to print a message to stderr and then quit --- diff --git a/eglbackend.cpp b/eglbackend.cpp index 0d765e9..2717b86 100644 --- a/eglbackend.cpp +++ b/eglbackend.cpp @@ -19,7 +19,6 @@ #include "eglbackend.h" #include "glutil.h" -#include #include #include @@ -47,11 +46,10 @@ static const char *eglErrorToString(EGLint e) #undef CASE } -static void exitEglError(const char *what) +static void dieEgl(const char *what) { EGLint e = eglGetError(); - fprintf(stderr, "EGL error %d (%s): %s\n", e, eglErrorToString(e), what); - exit(1); + die("EGL error %d (%s): %s\n", e, eglErrorToString(e), what); } static const EGLint configAttribs[] = { @@ -79,30 +77,28 @@ VisualID EGLBackend::initialize(Display *xDisplay) EGLint eglMajor, eglMinor; display = eglGetDisplay(xDisplay); if (display == EGL_NO_DISPLAY) - exitEglError("Failed to get EGL display"); + dieEgl("Failed to get EGL display"); if (eglInitialize(display, &eglMajor, &eglMinor) == EGL_FALSE) - exitEglError("Failed to initialize EGL"); + dieEgl("Failed to initialize EGL"); printf("Using EGL version: %d.%d\n", eglMajor, eglMinor); if (eglMajor == 1 && eglMinor < 3) { // Choosing the GL context version requires EGL 1.3 - fprintf(stderr, "Need at least EGL 1.3 to function properly\n"); - exit(1); + die("Need at least EGL 1.3 to function properly\n"); } #ifdef CON_GLES2 if (eglBindAPI(EGL_OPENGL_ES_API) == EGL_FALSE) #else if (eglBindAPI(EGL_OPENGL_API) == EGL_FALSE) #endif - exitEglError("Failed to bind API"); + dieEgl("Failed to bind API"); // get an appropriate config EGLConfig configs[1]; EGLint count; if (eglChooseConfig(display, configAttribs, configs, 1, &count) == EGL_FALSE){ - exitEglError("Failed to choose framebuffer configuration"); + dieEgl("Failed to choose framebuffer configuration"); } if (count == 0) { - fprintf(stderr, "Found no matching framebuffer configuration\n"); - exit(1); + die("Found no matching framebuffer configuration\n"); } config = configs[0]; } @@ -119,9 +115,9 @@ void EGLBackend::createContext(Window window) // create an EGL context and use it with the surface context = eglCreateContext(display, config, EGL_NO_CONTEXT, contextAttribs); if (context == EGL_NO_CONTEXT) - exitEglError("Failed to create context"); + dieEgl("Failed to create context"); if (eglMakeCurrent(display, surface, surface, context) == EGL_FALSE) - exitEglError("Failed to make context current"); + dieEgl("Failed to make context current"); printf("Using GL version: %s\n", glGetString(GL_VERSION)); // initialise GL utilities resolveFunctionPointers(eglGetProcAddress); @@ -144,7 +140,7 @@ void EGLBackend::swapBuffers() const { assert(context != EGL_NO_CONTEXT); // this implies the display is also initialized if (eglSwapBuffers(display, surface) == EGL_FALSE) - exitEglError("Failed to swap buffers"); + dieEgl("Failed to swap buffers"); } void EGLBackend::setSwapInterval(int i) const @@ -152,16 +148,14 @@ void EGLBackend::setSwapInterval(int i) const assert(context != EGL_NO_CONTEXT); // check if swap interval value is supported if (i < 0) { - fprintf(stderr, "Cannot set swap interval to %d, must not be negative\n", i); - exit(1); + die("Cannot set swap interval to %d, must not be negative\n", i); } EGLint val; eglGetConfigAttrib(display, config, EGL_MAX_SWAP_INTERVAL, &val); if (i > val) { - fprintf(stderr, "Cannot set swap interval to %d, maximum supported value is %d\n", i, val); - exit(1); + die("Cannot set swap interval to %d, maximum supported value is %d\n", i, val); } // use it if (eglSwapInterval(display, i) == EGL_FALSE) - exitEglError("Failed to set swap interval"); + dieEgl("Failed to set swap interval"); } diff --git a/glutil.cpp b/glutil.cpp index 0da85d5..325c131 100644 --- a/glutil.cpp +++ b/glutil.cpp @@ -20,6 +20,16 @@ #include #include +#include + +void die(const char *msg, ...) +{ + va_list ap; + va_start(ap, msg); + vfprintf(stderr, msg, ap); + va_end(ap); + exit(1); +} static const char *glErrorToString(GLenum e) { @@ -43,6 +53,5 @@ void checkGlError(const char *what) { GLenum e = glGetError(); if (e == GL_NO_ERROR) return; - fprintf(stderr, "GL error %d (%s): %s\n", e, glErrorToString(e), what); - exit(1); + die("GL error %d (%s): %s\n", e, glErrorToString(e), what); } diff --git a/glutil.h b/glutil.h index 3c1a6d2..dd1051e 100644 --- a/glutil.h +++ b/glutil.h @@ -23,12 +23,24 @@ #include #endif +/** + * GNUC has the ability to check format strings that follow the syntax used in printf and others. +Hide the differences between different compilers in this GNUC_FORMAT_CHECK macro. +Copied from Wireshark sources. +*/ +#if __GNUC__ >= 2 + #define GNUC_FORMAT_CHECK(archetype, string_index, first_to_check) __attribute__((format (archetype, string_index, first_to_check))) +#else + #define GNUC_FORMAT_CHECK(archetype, string_index, first_to_check) +#endif + /* Function name resolving: Call this after initialising the context, but before any utility function is called */ typedef void (*T_proc)(void); typedef T_proc (*T_glGetProcAddress)(char const * procname); void resolveFunctionPointers(T_glGetProcAddress p_glGetProcAddress); /* The actual utility functions */ +void die(const char *msg, ...) GNUC_FORMAT_CHECK(printf, 1, 2); void checkGlError(const char *what); void initialise2dProjection(); void drawQuad(GLfloat red, GLfloat green, GLfloat blue, GLfloat x1, GLfloat y1, GLfloat x2, GLfloat y2); diff --git a/glutil_gl2.cpp b/glutil_gl2.cpp index 68a789b..8e55b93 100644 --- a/glutil_gl2.cpp +++ b/glutil_gl2.cpp @@ -78,8 +78,7 @@ static T_proc resolveFunctionPointer(T_glGetProcAddress p_glGetProcAddress, cons { T_proc proc = p_glGetProcAddress(name); if (proc == NULL) { - fprintf(stderr, "Error resolvung function %s\n", name); - exit(1); + die("Error resolvung function %s\n", name); } return proc; } @@ -96,8 +95,7 @@ void resolveFunctionPointers(T_glGetProcAddress p_glGetProcAddress) int majorVersion; ssm >> majorVersion; if (majorVersion < 2) { - fprintf(stderr, "Need at least GL 2.0 to function properly, but detected version %d\n", majorVersion); - exit(1); + die("Need at least GL 2.0 to function properly, but detected version %d\n", majorVersion); } #endif diff --git a/glxbackend.cpp b/glxbackend.cpp index e40e90c..2023954 100644 --- a/glxbackend.cpp +++ b/glxbackend.cpp @@ -21,7 +21,6 @@ #include #include -#include #include #include @@ -61,8 +60,7 @@ VisualID GLXBackend::initialize(Display *display) printf("Using GLX version: %d.%d\n", glxMajor, glxMinor); if (glxMajor < 1 || (glxMajor == 1 && glxMinor < 3)) { // glXChooseFBConfig and glXCreateNewContext require GLX 1.3 - fprintf(stderr, "Need at least GLX 1.3 to function properly\n"); - exit(1); + die("Need at least GLX 1.3 to function properly\n"); } // check for extension-based functions funSwapIntervalMesa = (PFNGLXSWAPINTERVALMESAPROC)resolveGLXFunction("GLX_MESA_swap_control", "glXSwapIntervalMESA"); @@ -72,8 +70,7 @@ VisualID GLXBackend::initialize(Display *display) int count = 0; GLXFBConfig *configs = glXChooseFBConfig(display, DefaultScreen(display), configAttribs, &count); if (count < 1) { - fprintf(stderr, "Failed to choose framebuffer configuration\n"); - exit(1); + die("Failed to choose framebuffer configuration\n"); } config = configs[0]; XFree(configs); @@ -110,14 +107,12 @@ void GLXBackend::createContext(Window window) context = glXCreateNewContext(display, config, GLX_RGBA_TYPE, NULL, GL_TRUE); #else if (!funCreateContextAttribsARB) { - fprintf(stderr, "Cannot create GL3 context: GLX_ARB_create_context not supported\n"); - exit(1); + die("Cannot create GL3 context: GLX_ARB_create_context not supported\n"); } context = funCreateContextAttribsARB(display, config, NULL, GL_TRUE, contextAttribs); #endif if (!context) { - fprintf(stderr, "Error creating context\n"); - exit(1); + die("Error creating context\n"); } glXMakeCurrent(display, window, context); assert(glXIsDirect(display, context)); @@ -147,8 +142,7 @@ void GLXBackend::setSwapInterval(int i) const assert(context != None); // check if swap interval value is supported if (i < 0) { - fprintf(stderr, "Cannot set swap interval to %d, must not be negative\n", i); - exit(1); + die("Cannot set swap interval to %d, must not be negative\n", i); } // set it if (funSwapIntervalExt) @@ -156,7 +150,6 @@ void GLXBackend::setSwapInterval(int i) const else if (funSwapIntervalMesa) funSwapIntervalMesa(i); else { - fprintf(stderr, "At least one of GLX_EXT_swap_control, GLX_MESA_swap_control must be supported by the system\n"); - abort(); + die("At least one of GLX_EXT_swap_control, GLX_MESA_swap_control must be supported by the system\n"); } }