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mesa: make sure the gotten value isn't greater than the

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max depth buffer value on 64bit system. fix bug #12095
This commit is contained in:
Xiang, Haihao 2007-09-27 10:44:45 -06:00 • committed by Brian
parent 44f032db61
commit 2a86a449ca
1 changed files with 5 additions and 2 deletions
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7
src/mesa/swrast/s_span.c
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@ -61,8 +61,11 @@ _swrast_span_default_z( GLcontext *ctx, SWspan *span )
const GLfloat depthMax = ctx->DrawBuffer->_DepthMaxF;
if (ctx->DrawBuffer->Visual.depthBits <= 16)
span->z = FloatToFixed(ctx->Current.RasterPos[2] * depthMax + 0.5F);
else
span->z = (GLint) (ctx->Current.RasterPos[2] * depthMax + 0.5F);
else {
GLfloat tmpf = ctx->Current.RasterPos[2] * depthMax;
tmpf = MIN2(tmpf, depthMax);
span->z = (GLint) tmpf;
}
span->zStep = 0;
span->interpMask |= SPAN_Z;
}