diff options
| -rw-r--r-- | src/mesa/main/matrix.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/src/mesa/main/matrix.c b/src/mesa/main/matrix.c index 6a72da9acf7..eab6499970d 100644 --- a/src/mesa/main/matrix.c +++ b/src/mesa/main/matrix.c @@ -1,4 +1,4 @@ -/* $Id: matrix.c,v 1.2 1999/09/05 19:59:33 keithw Exp $ */ +/* $Id: matrix.c,v 1.3 1999/09/09 18:49:36 miklos Exp $ */ /* * Mesa 3-D graphics library @@ -912,8 +912,9 @@ void gl_Frustum( GLcontext *ctx, GET_ACTIVE_MATRIX( ctx, mat, ctx->NewState, "glFrustrum" ); - if (nearval<=0.0 || farval<=0.0) { + if ((nearval<=0.0 || farval<=0.0) || (nearval == farval) || (left == right) || (top == bottom)) { gl_error( ctx, GL_INVALID_VALUE, "glFrustum(near or far)" ); + return; } x = (2.0*nearval) / (right-left); @@ -961,6 +962,11 @@ void gl_Ortho( GLcontext *ctx, GLmatrix *mat = 0; GET_ACTIVE_MATRIX( ctx, mat, ctx->NewState, "glOrtho" ); + + if ((left == right) || (bottom == top) || (nearval == farval)) { + gl_error( ctx, GL_INVALID_VALUE, "gl_Ortho((l = r) or (b = top) or (n=f)" ); + return; + } x = 2.0 / (right-left); y = 2.0 / (top-bottom); |