mesa: Use floats for viewport bounds.

ARB_viewport_array specifies that DEPTH_RANGE consists of double-
precision parameters (corresponding commit d4dc35987), and a preparatory
commit (6340e609a) added _mesa_get_viewport_xform() which returned
double-precision scale[3] and translate[3] vectors, even though X, Y,
Width, and Height were still floats.

All users of _mesa_get_viewport_xform() immediately convert the double
scale and translation vectors into floats (which were floats originally,
but were converted to doubles in _mesa_get_viewport_xform(), sigh).

i965 at least cannot consume doubles (see SF_CLIP_VIEWPORT). If we want
to pass doubles to hardware, we should have a different function that
does that.

Acked-by: Mathias Froehlich <[email protected]>

1 files changed, 1 insertions, 1 deletions

diff --git a/src/mesa/drivers/dri/radeon/radeon_state.c b/src/mesa/drivers/dri/radeon/radeon_state.c
index 156afb6f6ac..74c1fc6c902 100644
--- a/src/mesa/drivers/dri/radeon/radeon_state.c
+++ b/src/mesa/drivers/dri/radeon/radeon_state.c
@@ -1354,7 +1354,7 @@ void radeonUpdateWindow( struct gl_context *ctx )
    GLfloat xoffset = 0.0;
    GLfloat yoffset = dPriv ? (GLfloat) dPriv->h : 0;
    const GLboolean render_to_fbo = (ctx->DrawBuffer ? _mesa_is_user_fbo(ctx->DrawBuffer) : 0);
-   double scale[3], translate[3];
+   float scale[3], translate[3];
    GLfloat y_scale, y_bias;
 
    if (render_to_fbo) {