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mesa: call glColorMask(1,1,1,1) before glClear()

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Without this, second and subsequent redraws rendered incorrectly.
Plus comments.
This commit is contained in:
Brian Paul 2008-03-14 11:35:57 -06:00
parent 9de9e1fe8c
commit 14150bc856
1 changed files with 4 additions and 0 deletions
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4
progs/trivial/tri-mask-tri.c
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@ -70,8 +70,11 @@ static void Key(unsigned char key, int x, int y)
static void Draw(void)
{
glColorMask(1,1,1,1);
glClear(GL_COLOR_BUFFER_BIT);
/* right triangle: green */
glBegin(GL_TRIANGLES);
glColor3f(0,1,0);
glVertex3f( 0.9, -0.9, -30.0);
@ -81,6 +84,7 @@ static void Draw(void)
glColorMask(1,0,1,0);
/* left triangle: white&mask: purple middle region: white */
glBegin(GL_TRIANGLES);
glColor3f(1,1,1);
glVertex3f(-0.9, -0.9, -30.0);