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Diffstat (limited to 'progs/trivial/tri-mask-tri.c')
-rw-r--r--progs/trivial/tri-mask-tri.c123
1 files changed, 63 insertions, 60 deletions
diff --git a/progs/trivial/tri-mask-tri.c b/progs/trivial/tri-mask-tri.c
index 38ecd20a73..8333f7ed8a 100644
--- a/progs/trivial/tri-mask-tri.c
+++ b/progs/trivial/tri-mask-tri.c
@@ -28,48 +28,53 @@
#include <GL/glut.h>
-#define CI_OFFSET_1 16
-#define CI_OFFSET_2 32
-
GLint Width = 250, Height = 250;
-
GLenum doubleBuffer;
+GLint Win;
+GLboolean Rmask = GL_TRUE, Gmask = GL_FALSE, Bmask = GL_TRUE;
+
static void Init(void)
{
fprintf(stderr, "GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER));
fprintf(stderr, "GL_VERSION = %s\n", (char *) glGetString(GL_VERSION));
fprintf(stderr, "GL_VENDOR = %s\n", (char *) glGetString(GL_VENDOR));
-
- glClearColor(0.0, 0.0, 1.0, 0.0);
+ glClearColor(0.0, 0.0, 1.0, 0.0);
}
static void Reshape(int width, int height)
{
-
- glViewport(0, 0, (GLint)width, (GLint)height);
-
- glMatrixMode(GL_PROJECTION);
- glLoadIdentity();
- glOrtho(-1.0, 1.0, -1.0, 1.0, -0.5, 1000.0);
- glMatrixMode(GL_MODELVIEW);
+ glViewport(0, 0, (GLint)width, (GLint)height);
+ glMatrixMode(GL_PROJECTION);
+ glLoadIdentity();
+ glOrtho(-1.0, 1.0, -1.0, 1.0, -0.5, 1000.0);
+ glMatrixMode(GL_MODELVIEW);
}
static void Key(unsigned char key, int x, int y)
{
-
- switch (key) {
- case 27:
- exit(1);
- default:
- return;
- }
-
- glutPostRedisplay();
+ switch (key) {
+ case 'r':
+ Rmask = !Rmask;
+ break;
+ case 'g':
+ Gmask = !Gmask;
+ break;
+ case 'b':
+ Bmask = !Bmask;
+ break;
+ case 27:
+ glutDestroyWindow(Win);
+ exit(1);
+ default:
+ return;
+ }
+ glutPostRedisplay();
}
static void Draw(void)
{
+ printf("ColorMask = %d, %d, %d\n", Rmask, Gmask, Bmask);
glColorMask(1,1,1,1);
glClear(GL_COLOR_BUFFER_BIT);
@@ -82,7 +87,7 @@ static void Draw(void)
glVertex3f(-0.9, 0.0, -30.0);
glEnd();
- glColorMask(1,0,1,0);
+ glColorMask(Rmask, Gmask, Bmask, 0);
/* left triangle: white&mask: purple middle region: white */
glBegin(GL_TRIANGLES);
@@ -103,48 +108,46 @@ static void Draw(void)
static GLenum Args(int argc, char **argv)
{
- GLint i;
-
- doubleBuffer = GL_FALSE;
-
- for (i = 1; i < argc; i++) {
- if (strcmp(argv[i], "-sb") == 0) {
- doubleBuffer = GL_FALSE;
- } else if (strcmp(argv[i], "-db") == 0) {
- doubleBuffer = GL_TRUE;
- } else {
- fprintf(stderr, "%s (Bad option).\n", argv[i]);
- return GL_FALSE;
- }
- }
- return GL_TRUE;
+ GLint i;
+
+ doubleBuffer = GL_FALSE;
+
+ for (i = 1; i < argc; i++) {
+ if (strcmp(argv[i], "-sb") == 0) {
+ doubleBuffer = GL_FALSE;
+ }
+ else if (strcmp(argv[i], "-db") == 0) {
+ doubleBuffer = GL_TRUE;
+ }
+ else {
+ fprintf(stderr, "%s (Bad option).\n", argv[i]);
+ return GL_FALSE;
+ }
+ }
+ return GL_TRUE;
}
+
int main(int argc, char **argv)
{
- GLenum type;
-
- glutInit(&argc, argv);
+ GLenum type;
- if (Args(argc, argv) == GL_FALSE) {
- exit(1);
- }
+ glutInit(&argc, argv);
- glutInitWindowPosition(100, 0); glutInitWindowSize(Width, Height);
-
- type = GLUT_RGB;
- type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE;
- glutInitDisplayMode(type);
-
- if (glutCreateWindow("First Tri") == GL_FALSE) {
- exit(1);
- }
-
- Init();
+ if (Args(argc, argv) == GL_FALSE) {
+ exit(1);
+ }
- glutReshapeFunc(Reshape);
- glutKeyboardFunc(Key);
- glutDisplayFunc(Draw);
- glutMainLoop();
- return 0;
+ type = GLUT_RGB;
+ type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE;
+
+ glutInitWindowPosition(100, 0); glutInitWindowSize(Width, Height);
+ glutInitDisplayMode(type);
+ Win = glutCreateWindow("First Tri");
+ Init();
+ glutReshapeFunc(Reshape);
+ glutKeyboardFunc(Key);
+ glutDisplayFunc(Draw);
+ glutMainLoop();
+ return 0;
}