diff options
Diffstat (limited to 'progs/demos/osdemo32.c')
| -rw-r--r-- | progs/demos/osdemo32.c | 32 |
1 files changed, 23 insertions, 9 deletions
diff --git a/progs/demos/osdemo32.c b/progs/demos/osdemo32.c index b425a56c84..7295b46a83 100644 --- a/progs/demos/osdemo32.c +++ b/progs/demos/osdemo32.c @@ -4,7 +4,7 @@ * * Compile with something like this: * - * gcc osdemo32.c -I../include -L../lib -lOSMesa32 -lm -o osdemo32 + * gcc osdemo32.c -I../../include -L../../lib -lglut -lGLU -lOSMesa32 -lm -o osdemo32 */ @@ -194,13 +194,13 @@ write_targa(const char *filename, const GLfloat *buffer, int width, int height) static void -write_ppm(const char *filename, const GLubyte *buffer, int width, int height) +write_ppm(const char *filename, const GLfloat *buffer, int width, int height) { const int binary = 0; FILE *f = fopen( filename, "w" ); if (f) { int i, x, y; - const GLubyte *ptr = buffer; + const GLfloat *ptr = buffer; if (binary) { fprintf(f,"P6\n"); fprintf(f,"# ppm-file created by osdemo.c\n"); @@ -210,10 +210,17 @@ write_ppm(const char *filename, const GLubyte *buffer, int width, int height) f = fopen( filename, "ab" ); /* reopen in binary append mode */ for (y=height-1; y>=0; y--) { for (x=0; x<width; x++) { + int r, g, b; i = (y*width + x) * 4; - fputc(ptr[i], f); /* write red */ - fputc(ptr[i+1], f); /* write green */ - fputc(ptr[i+2], f); /* write blue */ + r = (int) (ptr[i+0] * 255.0); + g = (int) (ptr[i+1] * 255.0); + b = (int) (ptr[i+2] * 255.0); + if (r > 255) r = 255; + if (g > 255) g = 255; + if (b > 255) b = 255; + fputc(r, f); /* write red */ + fputc(g, f); /* write green */ + fputc(b, f); /* write blue */ } } } @@ -226,8 +233,15 @@ write_ppm(const char *filename, const GLubyte *buffer, int width, int height) fprintf(f,"255\n"); for (y=height-1; y>=0; y--) { for (x=0; x<width; x++) { + int r, g, b; i = (y*width + x) * 4; - fprintf(f, " %3d %3d %3d", ptr[i], ptr[i+1], ptr[i+2]); + r = (int) (ptr[i+0] * 255.0); + g = (int) (ptr[i+1] * 255.0); + b = (int) (ptr[i+2] * 255.0); + if (r > 255) r = 255; + if (g > 255) g = 255; + if (b > 255) b = 255; + fprintf(f, " %3d %3d %3d", r, g, b); counter++; if (counter % 5 == 0) fprintf(f, "\n"); @@ -242,7 +256,7 @@ write_ppm(const char *filename, const GLubyte *buffer, int width, int height) int main( int argc, char *argv[] ) { - void *buffer; + GLfloat *buffer; /* Create an RGBA-mode context */ #if OSMESA_MAJOR_VERSION * 100 + OSMESA_MINOR_VERSION >= 305 @@ -257,7 +271,7 @@ int main( int argc, char *argv[] ) } /* Allocate the image buffer */ - buffer = malloc( WIDTH * HEIGHT * 4 * sizeof(GLfloat)); + buffer = (GLfloat *) malloc( WIDTH * HEIGHT * 4 * sizeof(GLfloat)); if (!buffer) { printf("Alloc image buffer failed!\n"); return 0; |