X-Git-Url: https://git.cworth.org/git?a=blobdiff_plain;f=test%2Fglx-dlopen-gpa.c;fp=test%2Fglx-dlopen-gpa.c;h=716d3e2ffc7e31351140a4ecc45b61fb10057448;hb=6b4c98a569784ffe9c0d580daf687cb624708937;hp=0000000000000000000000000000000000000000;hpb=5e4dbac425d1c9f1461d071b2a05d26b2c75831f;p=fips diff --git a/test/glx-dlopen-gpa.c b/test/glx-dlopen-gpa.c new file mode 100644 index 0000000..716d3e2 --- /dev/null +++ b/test/glx-dlopen-gpa.c @@ -0,0 +1,249 @@ +/* Copyright © 2013, Intel Corporation + * + * 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 THE + * AUTHORS OR COPYRIGHT HOLDERS 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. + */ + +/* Perform some simple drawing via OpenGL as follows: + * + * 1. Using GLX to construct an OpenGL context + * 2. By using dlopen to dynamically load libGL.so + * 3. By using dlsym to lookup OpenGL functions + */ + +#define GL_GLEXT_PROTOTYPES +#include +#include + +#include +#include +#include + +#include "util.h" + +void* (*my_glXGetProcAddress) (char *); +void (*my_glClear) (GLbitfield); +void (*my_glClearColor) (GLclampf, GLclampf, GLclampf, GLclampf); +void (*my_glLoadIdentity) (void); +void (*my_glMatrixMode) (GLenum); +void (*my_glOrtho) (GLdouble, GLdouble, GLdouble, GLdouble, GLdouble, GLdouble); +void (*my_glViewport) (GLint, GLint, GLsizei, GLsizei); +XVisualInfo * (*my_glXChooseVisual) (Display *, int, int *); +GLXContext (*my_glXCreateContext) (Display *, XVisualInfo *, GLXContext, Bool); +void (*my_glXDestroyContext) (Display *, GLXContext); +Bool (*my_glXMakeCurrent) (Display *, GLXDrawable, GLXContext); +void (*my_glXSwapBuffers) (Display *, GLXDrawable); + +static void +set_2d_projection (int width, int height) +{ + my_glMatrixMode (GL_PROJECTION); + my_glLoadIdentity (); + my_glOrtho (0, width, height, 0, 0, 1); + my_glMatrixMode (GL_MODELVIEW); +} + +static void +paint_rgb_using_clear (double r, double g, double b) +{ + my_glClearColor(r, g, b, 1.0); + my_glClear(GL_COLOR_BUFFER_BIT); +} + +static void +draw (Display *dpy, Window window, int width, int height) +{ + int i; + int visual_attr[] = { + GLX_RGBA, + GLX_RED_SIZE, 8, + GLX_GREEN_SIZE, 8, + GLX_BLUE_SIZE, 8, + GLX_ALPHA_SIZE, 8, + GLX_DOUBLEBUFFER, + GLX_DEPTH_SIZE, 24, + GLX_STENCIL_SIZE, 8, + GLX_X_VISUAL_TYPE, GLX_DIRECT_COLOR, + None + }; + + /* Window and context setup. */ + XVisualInfo *visual_info = my_glXChooseVisual(dpy, 0, visual_attr); + GLXContext ctx = my_glXCreateContext(dpy, visual_info, NULL, True); + my_glXMakeCurrent(dpy, window, ctx); + + my_glViewport(0, 0, width, height); + + set_2d_projection (width, height); + +/* Simply count through some colors, frame by frame. */ +#define RGB(frame) (((frame+1)/4) % 2), (((frame+1)/2) % 2), ((frame+1) % 2) + + int frame = 0; + for (i = 0; i < 2; i++) { + /* Frame: Draw a solid (magenta) frame */ + paint_rgb_using_clear (RGB(frame)); + my_glXSwapBuffers (dpy, window); + frame++; + + /* Frame: Draw a solid (yellow) frame */ + paint_rgb_using_clear (RGB(frame)); + my_glXSwapBuffers (dpy, window); + frame++; + + /* Frame: Draw a solid (cyan) frame */ + paint_rgb_using_clear (RGB(frame)); + my_glXSwapBuffers (dpy, window); + frame++; + } + + /* Cleanup */ + my_glXDestroyContext (dpy, ctx); +} + +static void +handle_events(Display *dpy, Window window) +{ + XEvent xev; + int width = 0; + int height = 0; + + XNextEvent (dpy, &xev); + + while (1) { + XNextEvent (dpy, &xev); + switch (xev.type) { + case ConfigureNotify: + width = xev.xconfigure.width; + height = xev.xconfigure.height; + break; + case Expose: + if (xev.xexpose.count == 0) { + draw (dpy, window, width, height); + return; + } + break; + } + } +} + +static void +resolve_symbols (void) +{ + void *gl_handle; + char *error; + + gl_handle = dlopen ("libGL.so", RTLD_LAZY); + if (gl_handle == NULL) { + fprintf (stderr, "Error: Failed to open libGL.so\n"); + exit (1); + } + + /* Clear errors. */ + dlerror(); + + my_glXGetProcAddress = dlsym (gl_handle, "glXGetProcAddress"); + error = dlerror (); + if (error) { + fprintf (stderr, "Failed to dlsym glXGetProcAddress: %s\n", error); + exit (1); + } + + my_glClear = my_glXGetProcAddress ("glClear"); + if (my_glClear == NULL) { + fprintf (stderr, "Failed to glXGetProcAddress glClear\n"); + exit (1); + } + + my_glClearColor = my_glXGetProcAddress ("glClearColor"); + if (my_glClearColor == NULL) { + fprintf (stderr, "Failed to glXGetProcAddress glClearColor\n"); + exit (1); + } + + my_glLoadIdentity = my_glXGetProcAddress ("glLoadIdentity"); + if (my_glLoadIdentity == NULL) { + fprintf (stderr, "Failed to glXGetProcAddress glLoadIdentity\n"); + exit (1); + } + + my_glMatrixMode = my_glXGetProcAddress ("glMatrixMode"); + if (my_glMatrixMode == NULL) { + fprintf (stderr, "Failed to glXGetProcAddress glMatrixMode\n"); + exit (1); + } + + my_glOrtho = my_glXGetProcAddress ("glOrtho"); + if (my_glOrtho == NULL) { + fprintf (stderr, "Failed to glXGetProcAddress glOrtho\n"); + exit (1); + } + + my_glViewport = my_glXGetProcAddress ("glViewport"); + if (my_glViewport == NULL) { + fprintf (stderr, "Failed to glXGetProcAddress glViewport\n"); + exit (1); + } + + my_glXChooseVisual = my_glXGetProcAddress ("glXChooseVisual"); + if (my_glXChooseVisual == NULL) { + fprintf (stderr, "Failed to glXGetProcAddress glXChooseVisual\n"); + exit (1); + } + + my_glXCreateContext = my_glXGetProcAddress ("glXCreateContext"); + if (my_glXCreateContext == NULL) { + fprintf (stderr, "Failed to glXGetProcAddress glXCreateContext\n"); + exit (1); + } + + my_glXDestroyContext = my_glXGetProcAddress ("glXDestroyContext"); + if (my_glXDestroyContext == NULL) { + fprintf (stderr, "Failed to glXGetProcAddress glXDestroyContext\n"); + exit (1); + } + + my_glXMakeCurrent = my_glXGetProcAddress ("glXMakeCurrent"); + if (my_glXMakeCurrent == NULL) { + fprintf (stderr, "Failed to glXGetProcAddress glXMakeCurrent\n"); + exit (1); + } + + my_glXSwapBuffers = my_glXGetProcAddress ("glXSwapBuffers"); + if (my_glXSwapBuffers == NULL) { + fprintf (stderr, "Failed to glXGetProcAddress glXSwapBuffers\n"); + exit (1); + } +} + +int +main (void) +{ + Display *dpy; + Window window; + + util_init_display_window (&dpy, &window); + + resolve_symbols (); + + handle_events (dpy, window); + + util_fini_display_window (dpy, window); + + return 0; +}