}
+static void
+update_viewport_matrix(GLcontext *ctx)
+{
+ const GLfloat depthMax = ctx->DrawBuffer->_DepthMaxF;
+
+ ASSERT(depthMax > 0);
+
+ /* Compute scale and bias values. This is really driver-specific
+ * and should be maintained elsewhere if at all.
+ * NOTE: RasterPos uses this.
+ */
+ _math_matrix_viewport(&ctx->Viewport._WindowMap,
+ ctx->Viewport.X, ctx->Viewport.Y,
+ ctx->Viewport.Width, ctx->Viewport.Height,
+ ctx->Viewport.Near, ctx->Viewport.Far,
+ depthMax);
+}
+
+
+
/**
* If __GLcontextRec::NewState is non-zero then this function \b must be called
* before rendering any primitive. Basically, function pointers and
if (new_state & (_NEW_ARRAY | _NEW_PROGRAM))
update_arrays( ctx );
+ if (new_state & (_NEW_BUFFERS | _NEW_VIEWPORT))
+ update_viewport_matrix(ctx);
+
if (ctx->_MaintainTexEnvProgram) {
if (new_state & (_NEW_TEXTURE | _DD_NEW_SEPARATE_SPECULAR | _NEW_FOG))
_mesa_UpdateTexEnvProgram(ctx);