On Friday, February 26, 2016 8:37:33 AM PST Samuel Iglesias Gonsálvez wrote:
> From ARB_viewport_array spec:
>
> " * On GL3-capable hardware the VIEWPORT_BOUNDS_RANGE should be at least
> [-16384, 16383].
> * On GL4-capable hardware the VIEWPORT_BOUNDS_RANGE should be at least
> [-32768, 32767]."
>
> Signed-off-by: Samuel Iglesias Gonsálvez <sigles...@igalia.com>
> ---
> src/mesa/drivers/dri/i965/brw_context.c | 13 +++++++++----
> 1 file changed, 9 insertions(+), 4 deletions(-)
>
> diff --git a/src/mesa/drivers/dri/i965/brw_context.c b/src/mesa/drivers/dri/
i965/brw_context.c
> index 31b6b2a..1569992 100644
> --- a/src/mesa/drivers/dri/i965/brw_context.c
> +++ b/src/mesa/drivers/dri/i965/brw_context.c
> @@ -687,10 +687,15 @@ brw_initialize_context_constants(struct brw_context
*brw)
> ctx->Const.MaxViewports = GEN6_NUM_VIEWPORTS;
> ctx->Const.ViewportSubpixelBits = 0;
>
> - /* Cast to float before negating because MaxViewportWidth is
unsigned.
> - */
> - ctx->Const.ViewportBounds.Min = -(float)ctx->Const.MaxViewportWidth;
> - ctx->Const.ViewportBounds.Max = ctx->Const.MaxViewportWidth;
> + if (brw->intelScreen->driScrnPriv->max_gl_core_version >= 40) {
> + ctx->Const.ViewportBounds.Min = -32768;
> + ctx->Const.ViewportBounds.Max = 32767;
> + } else {
> + /* Cast to float before negating because MaxViewportWidth is
unsigned.
> + */
> + ctx->Const.ViewportBounds.Min = -(float)ctx-
>Const.MaxViewportWidth;
> + ctx->Const.ViewportBounds.Max = ctx->Const.MaxViewportWidth;
> + }
> }
>
> /* ARB_gpu_shader5 */
> Shouldn't we just support a 32k x 32k viewport? In other words, change MaxViewportWidth/MaxViewportHeight? --Ken
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