mesa: clear the unused upper-left region to black instead of leaving it undefined
This commit is contained in:
parent
f911ca0834
commit
60b92129b1
|
@ -264,38 +264,44 @@ draw(void)
|
|||
glLoadIdentity();
|
||||
glTranslatef(0.0, 0.0, -40.0);
|
||||
|
||||
/* clear whole depth buffer */
|
||||
glDisable(GL_SCISSOR_TEST);
|
||||
glClear(GL_DEPTH_BUFFER_BIT);
|
||||
glEnable(GL_SCISSOR_TEST);
|
||||
|
||||
/* draw gears */
|
||||
/* clear upper-left corner of color buffer (unused space) */
|
||||
glScissor(0, TexHeight, TexWidth, WinHeight - TexHeight);
|
||||
glClearColor(0.0, 0.0, 0.0, 0.0);
|
||||
glClear(GL_COLOR_BUFFER_BIT);
|
||||
|
||||
/* clear lower-left corner of color buffer */
|
||||
glViewport(0, 0, TexWidth, TexHeight);
|
||||
glScissor(0, 0, TexWidth, TexHeight);
|
||||
glClearColor(0.5, 0.5, 0.8, 0.0);
|
||||
glClearColor(1, 1, 1, 0);
|
||||
glClear(GL_COLOR_BUFFER_BIT);
|
||||
|
||||
/* draw gears in lower-left corner */
|
||||
glMatrixMode(GL_PROJECTION);
|
||||
glLoadIdentity();
|
||||
glFrustum(-1.0, 1.0, -1.0, 1.0, 5.0, 60.0);
|
||||
glMatrixMode(GL_MODELVIEW);
|
||||
|
||||
DrawGears();
|
||||
|
||||
/* copy color buffer to texture */
|
||||
glCopyTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, 0, 0, TexWidth, TexHeight);
|
||||
|
||||
/* draw textured cube */
|
||||
/* clear right half of color buffer */
|
||||
glViewport(TexWidth, 0, WinWidth - TexWidth, WinHeight);
|
||||
glScissor(TexWidth, 0, WinWidth - TexWidth, WinHeight);
|
||||
glClearColor(0.5, 0.5, 0.8, 0.0);
|
||||
glClear(GL_COLOR_BUFFER_BIT);
|
||||
|
||||
/* draw textured cube in right half of window */
|
||||
ar = (float) (WinWidth - TexWidth) / WinHeight;
|
||||
glMatrixMode(GL_PROJECTION);
|
||||
glLoadIdentity();
|
||||
glFrustum(-ar, ar, -1.0, 1.0, 5.0, 60.0);
|
||||
glMatrixMode(GL_MODELVIEW);
|
||||
|
||||
DrawCube();
|
||||
|
||||
/* finish up */
|
||||
|
|
Loading…
Reference in New Issue