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| author | Brian Paul <brianp@vmware.com> | 2010-02-15 18:04:00 -0700 |
|---|---|---|
| committer | Brian Paul <brianp@vmware.com> | 2010-02-15 18:04:39 -0700 |
| commit | c6e63f3cc235b2d7b06664a493584671a2493045 (patch) | |
| tree | 9f254c44ea3fc2c999ed78312a775495a82721f2 /progs/redbook/histogram.c | |
| parent | bd3829b5f5b204d95d9ac3e5538ca11d0904ba7d (diff) | |
| download | external_mesa3d-c6e63f3cc235b2d7b06664a493584671a2493045.zip external_mesa3d-c6e63f3cc235b2d7b06664a493584671a2493045.tar.gz external_mesa3d-c6e63f3cc235b2d7b06664a493584671a2493045.tar.bz2 | |
progs/redbook: use glew
Diffstat (limited to 'progs/redbook/histogram.c')
| -rw-r--r-- | progs/redbook/histogram.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/progs/redbook/histogram.c b/progs/redbook/histogram.c index 7ddceb6..de1e59e 100644 --- a/progs/redbook/histogram.c +++ b/progs/redbook/histogram.c @@ -46,6 +46,7 @@ * use of the glHistogram() function. */ +#include <GL/glew.h> #include <GL/glut.h> #include <assert.h> #include <stdlib.h> @@ -113,6 +114,11 @@ readImage( const char* filename, GLsizei* width, GLsizei *height ) static void init(void) { + if (!glutExtensionSupported("GL_ARB_imaging")) { + fprintf(stderr, "Sorry, this program requires GL_ARB_imaging.\n"); + exit(1); + } + glPixelStorei(GL_UNPACK_ALIGNMENT, 1); glClearColor(0.0, 0.0, 0.0, 0.0); @@ -192,6 +198,7 @@ int main(int argc, char** argv) glutInitWindowSize(width, height); glutInitWindowPosition(100, 100); glutCreateWindow(argv[0]); + glewInit(); init(); glutReshapeFunc(reshape); glutKeyboardFunc(keyboard); |