Mercurial > sdl-ios-xcode
view test/testdyngl.c @ 2427:32b9909db651 gsoc2008_iphone
changed macro MAX_G_FORCE to SDL_IPHONE_MAX_GFORCE and moved it to the SDL_config_iphoneos.h file. This should allow users to convert between the Sint16 returned by polling the joystick and units of g-force, which better describe what is going on with the iPhone (and are what the iPhone OS actually gives you). This conversion wouldn't be necessary except that we'd need floating point to store everything as g-force.
author | Holmes Futrell <hfutrell@umail.ucsb.edu> |
---|---|
date | Fri, 15 Aug 2008 00:46:58 +0000 |
parents | 7b53a8401195 |
children | e27bdcc80744 |
line wrap: on
line source
/* * Small SDL example to demonstrate dynamically loading * OpenGL lib and functions * * (FYI it was supposed to look like snow in the wind or something...) * * Compile with : * gcc testdyngl.c `sdl-config --libs --cflags` -o testdyngl -DHAVE_OPENGL * * You can specify a different OpenGL lib on the command line, i.e. : * ./testdyngl /usr/X11R6/lib/libGL.so.1.2 * or * ./testdyngl /usr/lib/libGL.so.1.0.4496 * */ #include <stdio.h> #include <stdlib.h> #include "SDL.h" #ifdef __MACOS__ #define HAVE_OPENGL #endif #ifdef HAVE_OPENGL #include "SDL_opengl.h" /* Call this instead of exit(), so we can clean up SDL: atexit() is evil. */ static void quit(int rc) { SDL_Quit(); exit(rc); } void * get_funcaddr(const char *p) { void *f = SDL_GL_GetProcAddress(p); if (f) { return f; } else { printf("Unable to get function pointer for %s\n", p); quit(1); } return NULL; } typedef struct { void (APIENTRY * glBegin) (GLenum); void (APIENTRY * glEnd) (); void (APIENTRY * glVertex3f) (GLfloat, GLfloat, GLfloat); void (APIENTRY * glClearColor) (GLfloat, GLfloat, GLfloat, GLfloat); void (APIENTRY * glClear) (GLbitfield); void (APIENTRY * glDisable) (GLenum); void (APIENTRY * glEnable) (GLenum); void (APIENTRY * glColor4ub) (GLubyte, GLubyte, GLubyte, GLubyte); void (APIENTRY * glPointSize) (GLfloat); void (APIENTRY * glHint) (GLenum, GLenum); void (APIENTRY * glBlendFunc) (GLenum, GLenum); void (APIENTRY * glMatrixMode) (GLenum); void (APIENTRY * glLoadIdentity) (); void (APIENTRY * glOrtho) (GLdouble, GLdouble, GLdouble, GLdouble, GLdouble, GLdouble); void (APIENTRY * glRotatef) (GLfloat, GLfloat, GLfloat, GLfloat); void (APIENTRY * glViewport) (GLint, GLint, GLsizei, GLsizei); void (APIENTRY * glFogf) (GLenum, GLfloat); } glfuncs; void init_glfuncs(glfuncs * f) { f->glBegin = get_funcaddr("glBegin"); f->glEnd = get_funcaddr("glEnd"); f->glVertex3f = get_funcaddr("glVertex3f"); f->glClearColor = get_funcaddr("glClearColor"); f->glClear = get_funcaddr("glClear"); f->glDisable = get_funcaddr("glDisable"); f->glEnable = get_funcaddr("glEnable"); f->glColor4ub = get_funcaddr("glColor4ub"); f->glPointSize = get_funcaddr("glPointSize"); f->glHint = get_funcaddr("glHint"); f->glBlendFunc = get_funcaddr("glBlendFunc"); f->glMatrixMode = get_funcaddr("glMatrixMode"); f->glLoadIdentity = get_funcaddr("glLoadIdentity"); f->glOrtho = get_funcaddr("glOrtho"); f->glRotatef = get_funcaddr("glRotatef"); f->glViewport = get_funcaddr("glViewport"); f->glFogf = get_funcaddr("glFogf"); } #define NB_PIXELS 1000 int main(int argc, char *argv[]) { glfuncs f; int i; SDL_Event event; int done = 0; GLfloat pixels[NB_PIXELS * 3]; const char *gl_library = NULL; /* Use the default GL library */ if (argv[1]) { gl_library = argv[1]; } if (SDL_Init(SDL_INIT_VIDEO) < 0) { printf("Unable to init SDL : %s\n", SDL_GetError()); return (1); } if (SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1) < 0) { printf("Unable to set GL attribute : %s\n", SDL_GetError()); quit(1); } if (SDL_GL_LoadLibrary(gl_library) < 0) { printf("Unable to dynamically open GL lib : %s\n", SDL_GetError()); quit(1); } if (SDL_SetVideoMode(640, 480, 0, SDL_OPENGL) == NULL) { printf("Unable to open video mode : %s\n", SDL_GetError()); quit(1); } /* Set the window manager title bar */ SDL_WM_SetCaption("SDL Dynamic OpenGL Loading Test", "testdyngl"); init_glfuncs(&f); for (i = 0; i < NB_PIXELS; i++) { pixels[3 * i] = rand() % 250 - 125; pixels[3 * i + 1] = rand() % 250 - 125; pixels[3 * i + 2] = rand() % 250 - 125; } f.glViewport(0, 0, 640, 480); f.glMatrixMode(GL_PROJECTION); f.glLoadIdentity(); f.glOrtho(-100, 100, -100, 100, -500, 500); f.glMatrixMode(GL_MODELVIEW); f.glLoadIdentity(); f.glEnable(GL_DEPTH_TEST); f.glDisable(GL_TEXTURE_2D); f.glEnable(GL_BLEND); f.glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); f.glClearColor(0.0f, 0.0f, 0.0f, 0.0f); f.glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); f.glEnable(GL_POINT_SMOOTH); f.glHint(GL_POINT_SMOOTH_HINT, GL_NICEST); f.glPointSize(5.0f); f.glEnable(GL_FOG); f.glFogf(GL_FOG_START, -500); f.glFogf(GL_FOG_END, 500); f.glFogf(GL_FOG_DENSITY, 0.005); do { f.glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); f.glRotatef(2.0, 1.0, 1.0, 1.0); f.glRotatef(1.0, 0.0, 1.0, 1.0); f.glColor4ub(255, 255, 255, 255); f.glBegin(GL_POINTS); for (i = 0; i < NB_PIXELS; i++) { f.glVertex3f(pixels[3 * i], pixels[3 * i + 1], pixels[3 * i + 2]); } f.glEnd(); SDL_GL_SwapBuffers(); while (SDL_PollEvent(&event)) { if (event.type == SDL_KEYDOWN) done = 1; } SDL_Delay(20); } while (!done); SDL_Quit(); return 0; } #else /* HAVE_OPENGL */ int main(int argc, char *argv[]) { printf("No OpenGL support on this system\n"); return 1; } #endif /* HAVE_OPENGL */