diff options
| author | Brian Paul <brianp@vmware.com> | 2009-09-08 16:45:07 -0600 |
|---|---|---|
| committer | Brian Paul <brianp@vmware.com> | 2009-09-08 16:45:07 -0600 |
| commit | 079ae4c38cf8155f7aa039f6f4374fe5d351ef4f (patch) | |
| tree | 711c8193c5574ec45e62ebf86b515a1181fd14cb /progs | |
| parent | 126696caf7c2ab66420ab60a2c363613b88bacb4 (diff) | |
progs/demos: added RGB invert option
Diffstat (limited to 'progs')
| -rw-r--r-- | progs/demos/copypix.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/progs/demos/copypix.c b/progs/demos/copypix.c index 51435acfa0..a13339ea62 100644 --- a/progs/demos/copypix.c +++ b/progs/demos/copypix.c @@ -26,6 +26,7 @@ static int Scissor = 0; static float Xzoom, Yzoom; static GLboolean DrawFront = GL_FALSE; static GLboolean Dither = GL_TRUE; +static GLboolean Invert = GL_FALSE; static void Reset( void ) @@ -59,6 +60,15 @@ static void Display( void ) if (Scissor) glEnable(GL_SCISSOR_TEST); + if (Invert) { + glPixelTransferf(GL_RED_SCALE, -1.0); + glPixelTransferf(GL_GREEN_SCALE, -1.0); + glPixelTransferf(GL_BLUE_SCALE, -1.0); + glPixelTransferf(GL_RED_BIAS, 1.0); + glPixelTransferf(GL_GREEN_BIAS, 1.0); + glPixelTransferf(GL_BLUE_BIAS, 1.0); + } + /* draw copy */ glPixelZoom(Xzoom, Yzoom); glWindowPos2iARB(Xpos, Ypos); @@ -67,6 +77,15 @@ static void Display( void ) glDisable(GL_SCISSOR_TEST); + if (Invert) { + glPixelTransferf(GL_RED_SCALE, 1.0); + glPixelTransferf(GL_GREEN_SCALE, 1.0); + glPixelTransferf(GL_BLUE_SCALE, 1.0); + glPixelTransferf(GL_RED_BIAS, 0.0); + glPixelTransferf(GL_GREEN_BIAS, 0.0); + glPixelTransferf(GL_BLUE_BIAS, 0.0); + } + if (DrawFront) glFinish(); else @@ -105,6 +124,9 @@ static void Key( unsigned char key, int x, int y ) else glDisable(GL_DITHER); break; + case 'i': + Invert = !Invert; + break; case 's': Scissor = !Scissor; break; |