Mercurial > sdl-ios-xcode
view test/testdyngl.c @ 3798:c8b3d3d13ed1 SDL-ryan-multiple-audio-device
Audio bootstraps can now specify that a driver is only to be used if
explicitly requested (for things like the "disk" driver that is always
available but you would never want to default to using).
Trimmed out code that can be handled by stubs in the core. The "dummy" driver
is pretty damned small now. :)
author | Ryan C. Gordon <icculus@icculus.org> |
---|---|
date | Wed, 04 Oct 2006 21:27:53 +0000 |
parents | c121d94672cb |
children | 7b53a8401195 |
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/* * 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 */