From patchwork Sun Sep 1 16:23:19 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Fredrik Noring X-Patchwork-Id: 11125513 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 8833613B1 for ; Sun, 1 Sep 2019 16:23:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 65B2F20828 for ; Sun, 1 Sep 2019 16:23:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728848AbfIAQXW (ORCPT ); Sun, 1 Sep 2019 12:23:22 -0400 Received: from pio-pvt-msa2.bahnhof.se ([79.136.2.41]:60682 "EHLO pio-pvt-msa2.bahnhof.se" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728672AbfIAQXW (ORCPT ); Sun, 1 Sep 2019 12:23:22 -0400 Received: from localhost (localhost [127.0.0.1]) by pio-pvt-msa2.bahnhof.se (Postfix) with ESMTP id 549B13FC34 for ; Sun, 1 Sep 2019 18:23:20 +0200 (CEST) X-Virus-Scanned: Debian amavisd-new at bahnhof.se X-Spam-Flag: NO X-Spam-Score: -1.899 X-Spam-Level: X-Spam-Status: No, score=-1.899 tagged_above=-999 required=6.31 tests=[BAYES_00=-1.9, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Received: from pio-pvt-msa2.bahnhof.se ([127.0.0.1]) by localhost (pio-pvt-msa2.bahnhof.se [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 8Qct7PyYzeiR for ; Sun, 1 Sep 2019 18:23:19 +0200 (CEST) Received: from localhost (h-41-252.A163.priv.bahnhof.se [46.59.41.252]) (Authenticated sender: mb547485) by pio-pvt-msa2.bahnhof.se (Postfix) with ESMTPA id 9DFF83F62D for ; Sun, 1 Sep 2019 18:23:19 +0200 (CEST) Date: Sun, 1 Sep 2019 18:23:19 +0200 From: Fredrik Noring To: linux-mips@vger.kernel.org Subject: [PATCH 088/120] MIPS: PS2: GS: Primitive and texel coordinate transformations Message-ID: References: MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-mips-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-mips@vger.kernel.org The frame buffer coordinate system is the pixel drawing space, with integer coordinates. The primitive coordinate system is the drawing space used for vertices, with 4-bit fractional parts. The texel coordinate system is used for textures, with 4-bit fractional parts, centered on the position where the fractional parts are 0.5[1]. References: [1] "GS User's Manual", version 6.0, Sony Computer Entertainment Inc., pp. 23-24, 28. Signed-off-by: Fredrik Noring --- arch/mips/include/asm/mach-ps2/gs.h | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) diff --git a/arch/mips/include/asm/mach-ps2/gs.h b/arch/mips/include/asm/mach-ps2/gs.h index 5429f52a4518..935d03007680 100644 --- a/arch/mips/include/asm/mach-ps2/gs.h +++ b/arch/mips/include/asm/mach-ps2/gs.h @@ -46,6 +46,28 @@ u32 gs_psm_ct32_block_address(const u32 fbw, const u32 block_index); u32 gs_psm_ct16_block_address(const u32 fbw, const u32 block_index); +/** + * gs_fbcs_to_pcs - frame buffer coordinate to primitive coordinate + * @c: frame buffer coordinate + * + * Return: primitive coordinate + */ +static inline int gs_fbcs_to_pcs(const int c) +{ + return c * 16; /* The 4 least significant bits are fractional. */ +} + +/** + * gs_pxcs_to_tcs - pixel coordinate to texel coordinate + * @c: pixel coordinate + * + * Return: texel coordinate + */ +static inline int gs_pxcs_to_tcs(const int c) +{ + return c * 16 + 8; /* The 4 least significant bits are fractional. */ +} + struct gs_synch_gen gs_synch_gen_for_vck(const u32 vck); u32 gs_rfsh_from_synch_gen(const struct gs_synch_gen sg);