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More compliant error check.

This commit is contained in:
Miklos Fazekas 1999-09-09 18:49:36 +00:00
parent 36ca6bd82a
commit e4c15c12d8
1 changed files with 8 additions and 2 deletions
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10
src/mesa/main/matrix.c
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@ -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);