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mesa: toggle colormask values with r/g/b keys in tri-mask-tri.c

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Plus misc clean-up.
This commit is contained in:
Brian Paul 2008-10-09 19:50:57 -06:00
parent 583098e3cb
commit 02aea66b1a
1 changed files with 60 additions and 57 deletions
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117
progs/trivial/tri-mask-tri.c
View file

@ -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;
GLint i;
doubleBuffer = GL_FALSE;
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;
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;
GLenum type;
glutInit(&argc, argv);
glutInit(&argc, argv);
if (Args(argc, argv) == GL_FALSE) {
exit(1);
}
if (Args(argc, argv) == GL_FALSE) {
exit(1);
}
glutInitWindowPosition(100, 0); glutInitWindowSize(Width, Height);
type = GLUT_RGB;
type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE;
type = GLUT_RGB;
type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE;
glutInitDisplayMode(type);
if (glutCreateWindow("First Tri") == GL_FALSE) {
exit(1);
}
Init();
glutReshapeFunc(Reshape);
glutKeyboardFunc(Key);
glutDisplayFunc(Draw);
glutMainLoop();
return 0;
glutInitWindowPosition(100, 0); glutInitWindowSize(Width, Height);
glutInitDisplayMode(type);
Win = glutCreateWindow("First Tri");
Init();
glutReshapeFunc(Reshape);
glutKeyboardFunc(Key);
glutDisplayFunc(Draw);
glutMainLoop();
return 0;
}