src/gallium/drivers/freedreno/a3xx/fd3_util.c - platform/external/mesa3d - Gitiles

 /* -*- mode: C; c-file-style: "k&r"; tab-width 4; indent-tabs-mode: t; -*- */

 /*
  * Copyright (C) 2013 Rob Clark <robclark@freedesktop.org>
  *
  * Permission is hereby granted, free of charge, to any person obtaining a
  * copy of this software and associated documentation files (the "Software"),
  * to deal in the Software without restriction, including without limitation
  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  * and/or sell copies of the Software, and to permit persons to whom the
  * Software is furnished to do so, subject to the following conditions:
  *
  * The above copyright notice and this permission notice (including the next
  * paragraph) shall be included in all copies or substantial portions of the
  * Software.
  *
  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  * SOFTWARE.
  *
  * Authors:
  *    Rob Clark <robclark@freedesktop.org>
  */

 #include "pipe/p_defines.h"
 #include "util/u_format.h"

 #include "fd3_util.h"

 /* convert pipe format to vertex buffer format: */
 enum a3xx_vtx_fmt
 fd3_pipe2vtx(enum pipe_format format)
 {
 	switch (format) {
 	/* 8-bit buffers. */
 	case PIPE_FORMAT_R8_UNORM:
 		return VFMT_NORM_UBYTE_8;

 	case PIPE_FORMAT_R8_SNORM:
 		return VFMT_NORM_BYTE_8;

 	case PIPE_FORMAT_R8_UINT:
 	case PIPE_FORMAT_R8_USCALED:
 		return VFMT_UBYTE_8;

 	case PIPE_FORMAT_R8_SINT:
 	case PIPE_FORMAT_R8_SSCALED:
 		return VFMT_BYTE_8;

 	/* 16-bit buffers. */
 	case PIPE_FORMAT_R16_UNORM:
 	case PIPE_FORMAT_Z16_UNORM:
 		return VFMT_NORM_USHORT_16;

 	case PIPE_FORMAT_R16_SNORM:
 		return VFMT_NORM_SHORT_16;

 	case PIPE_FORMAT_R16_UINT:
 	case PIPE_FORMAT_R16_USCALED:
 		return VFMT_USHORT_16;

 	case PIPE_FORMAT_R16_SINT:
 	case PIPE_FORMAT_R16_SSCALED:
 		return VFMT_SHORT_16;

 	case PIPE_FORMAT_R16_FLOAT:
 		return VFMT_FLOAT_16;

 	case PIPE_FORMAT_R8G8_UNORM:
 		return VFMT_NORM_UBYTE_8_8;

 	case PIPE_FORMAT_R8G8_SNORM:
 		return VFMT_NORM_BYTE_8_8;

 	case PIPE_FORMAT_R8G8_UINT:
 	case PIPE_FORMAT_R8G8_USCALED:
 		return VFMT_UBYTE_8_8;

 	case PIPE_FORMAT_R8G8_SINT:
 	case PIPE_FORMAT_R8G8_SSCALED:
 		return VFMT_BYTE_8_8;

 	/* 24-bit buffers. */
 	case PIPE_FORMAT_R8G8B8_UNORM:
 		return VFMT_NORM_UBYTE_8_8_8;

 	case PIPE_FORMAT_R8G8B8_SNORM:
 		return VFMT_NORM_BYTE_8_8_8;

 	case PIPE_FORMAT_R8G8B8_UINT:
 	case PIPE_FORMAT_R8G8B8_USCALED:
 		return VFMT_UBYTE_8_8_8;

 	case PIPE_FORMAT_R8G8B8_SINT:
 	case PIPE_FORMAT_R8G8B8_SSCALED:
 		return VFMT_BYTE_8_8_8;

 	/* 32-bit buffers. */
 	case PIPE_FORMAT_A8B8G8R8_UNORM:
 	case PIPE_FORMAT_A8R8G8B8_UNORM:
 	case PIPE_FORMAT_B8G8R8A8_UNORM:
 	case PIPE_FORMAT_R8G8B8A8_UNORM:
 		return VFMT_NORM_UBYTE_8_8_8_8;

 	case PIPE_FORMAT_R8G8B8A8_SNORM:
 		return VFMT_NORM_BYTE_8_8_8_8;

 	case PIPE_FORMAT_R8G8B8A8_UINT:
 	case PIPE_FORMAT_R8G8B8A8_USCALED:
 		return VFMT_UBYTE_8_8_8_8;

 	case PIPE_FORMAT_R8G8B8A8_SINT:
 	case PIPE_FORMAT_R8G8B8A8_SSCALED:
 		return VFMT_BYTE_8_8_8_8;

 	case PIPE_FORMAT_R16G16_SSCALED:
 	case PIPE_FORMAT_R16G16_SINT:
 		return VFMT_SHORT_16_16;

 	case PIPE_FORMAT_R16G16_FLOAT:
 		return VFMT_FLOAT_16_16;

 	case PIPE_FORMAT_R16G16_UINT:
 	case PIPE_FORMAT_R16G16_USCALED:
 		return VFMT_USHORT_16_16;

 	case PIPE_FORMAT_R16G16_UNORM:
 		return VFMT_NORM_USHORT_16_16;

 	case PIPE_FORMAT_R16G16_SNORM:
 		return VFMT_NORM_SHORT_16_16;

 	case PIPE_FORMAT_R32_UINT:
 	case PIPE_FORMAT_R32_USCALED:
 		return VFMT_UINT_32;

 	case PIPE_FORMAT_R32_SINT:
 	case PIPE_FORMAT_R32_SSCALED:
 		return VFMT_INT_32;

 	case PIPE_FORMAT_R10G10B10A2_UNORM:
 		return VFMT_NORM_UINT_10_10_10_2;

 	case PIPE_FORMAT_R10G10B10A2_SNORM:
 		return VFMT_NORM_INT_10_10_10_2;

 	case PIPE_FORMAT_R10G10B10A2_UINT:
 	case PIPE_FORMAT_R10G10B10A2_USCALED:
 		return VFMT_UINT_10_10_10_2;

 	case PIPE_FORMAT_R10G10B10A2_SSCALED:
 		return VFMT_INT_10_10_10_2;

 	/* 48-bit buffers. */
 	case PIPE_FORMAT_R16G16B16_FLOAT:
 		return VFMT_FLOAT_16_16_16;

 	case PIPE_FORMAT_R16G16B16_SINT:
 	case PIPE_FORMAT_R16G16B16_SSCALED:
 		return VFMT_SHORT_16_16_16;

 	case PIPE_FORMAT_R16G16B16_UINT:
 	case PIPE_FORMAT_R16G16B16_USCALED:
 		return VFMT_USHORT_16_16_16;

 	case PIPE_FORMAT_R16G16B16_SNORM:
 		return VFMT_NORM_SHORT_16_16_16;

 	case PIPE_FORMAT_R16G16B16_UNORM:
 		return VFMT_NORM_USHORT_16_16_16;

 	case PIPE_FORMAT_R32_FLOAT:
 	case PIPE_FORMAT_Z32_FLOAT:
 		return VFMT_FLOAT_32;

 	case PIPE_FORMAT_R32_FIXED:
 		return VFMT_FIXED_32;

 	/* 64-bit buffers. */
 	case PIPE_FORMAT_R16G16B16A16_UNORM:
 		return VFMT_NORM_USHORT_16_16_16_16;

 	case PIPE_FORMAT_R16G16B16A16_SNORM:
 		return VFMT_NORM_SHORT_16_16_16_16;

 	case PIPE_FORMAT_R16G16B16A16_UINT:
 	case PIPE_FORMAT_R16G16B16A16_USCALED:
 		return VFMT_USHORT_16_16_16_16;

 	case PIPE_FORMAT_R16G16B16A16_SINT:
 	case PIPE_FORMAT_R16G16B16A16_SSCALED:
 		return VFMT_SHORT_16_16_16_16;

 	case PIPE_FORMAT_R32G32_FLOAT:
 		return VFMT_FLOAT_32_32;

 	case PIPE_FORMAT_R32G32_FIXED:
 		return VFMT_FIXED_32_32;

 	case PIPE_FORMAT_R16G16B16A16_FLOAT:
 		return VFMT_FLOAT_16_16_16_16;

 	case PIPE_FORMAT_R32G32_UINT:
 	case PIPE_FORMAT_R32G32_USCALED:
 		return VFMT_UINT_32_32;

 	case PIPE_FORMAT_R32G32_SINT:
 	case PIPE_FORMAT_R32G32_SSCALED:
 		return VFMT_INT_32_32;

 	/* 96-bit buffers. */
 	case PIPE_FORMAT_R32G32B32_FLOAT:
 		return VFMT_FLOAT_32_32_32;

 	case PIPE_FORMAT_R32G32B32_FIXED:
 		return VFMT_FIXED_32_32_32;

 	case PIPE_FORMAT_R32G32B32_UINT:
 	case PIPE_FORMAT_R32G32B32_USCALED:
 		return VFMT_UINT_32_32_32;

 	case PIPE_FORMAT_R32G32B32_SINT:
 	case PIPE_FORMAT_R32G32B32_SSCALED:
 		return VFMT_INT_32_32_32;

 	/* 128-bit buffers. */
 	case PIPE_FORMAT_R32G32B32A32_FLOAT:
 		return VFMT_FLOAT_32_32_32_32;

 	case PIPE_FORMAT_R32G32B32A32_FIXED:
 		return VFMT_FIXED_32_32_32_32;

 	case PIPE_FORMAT_R32G32B32A32_UINT:
 	case PIPE_FORMAT_R32G32B32A32_USCALED:
 		return VFMT_UINT_32_32_32_32;

 	case PIPE_FORMAT_R32G32B32A32_SINT:
 	case PIPE_FORMAT_R32G32B32A32_SSCALED:
 		return VFMT_INT_32_32_32_32;

 /* TODO normalized 32bit int formats do not appear to be supported
  * natively.. will require either shader variant or VFD_DECODE
  * gymnastics like the blob driver does..
 	case PIPE_FORMAT_R32G32B32A32_SNORM:
 	case PIPE_FORMAT_R32G32B32A32_UNORM:
  */

 	default:
 		return ~0;
 	}
 }

 /* convert pipe format to texture sampler format: */
 enum a3xx_tex_fmt
 fd3_pipe2tex(enum pipe_format format)
 {
 	switch (format) {
 	case PIPE_FORMAT_L8_UNORM:
 	case PIPE_FORMAT_A8_UNORM:
 	case PIPE_FORMAT_I8_UNORM:
 		return TFMT_NORM_UINT_8;

 	case PIPE_FORMAT_R8G8_UNORM:
 		return TFMT_NORM_UINT_8_8;

 	case PIPE_FORMAT_B8G8R8A8_UNORM:
 	case PIPE_FORMAT_B8G8R8X8_UNORM:
 	case PIPE_FORMAT_R8G8B8A8_UNORM:
 	case PIPE_FORMAT_R8G8B8X8_UNORM:
 	case PIPE_FORMAT_B8G8R8A8_SRGB:
 	case PIPE_FORMAT_B8G8R8X8_SRGB:
 	case PIPE_FORMAT_R8G8B8A8_SRGB:
 	case PIPE_FORMAT_R8G8B8X8_SRGB:
 		return TFMT_NORM_UINT_8_8_8_8;

 	case PIPE_FORMAT_Z24X8_UNORM:
 	case PIPE_FORMAT_Z24_UNORM_S8_UINT:
 		return TFMT_NORM_UINT_X8Z24;

 	case PIPE_FORMAT_Z16_UNORM:
 		return TFMT_NORM_USHORT_Z16;

 	case PIPE_FORMAT_R16G16B16A16_FLOAT:
 	case PIPE_FORMAT_R16G16B16X16_FLOAT:
 		return TFMT_FLOAT_16_16_16_16;

 	case PIPE_FORMAT_R32G32B32A32_FLOAT:
 	case PIPE_FORMAT_R32G32B32X32_FLOAT:
 		return TFMT_FLOAT_32_32_32_32;

 	// TODO add more..

 	default:
 		return ~0;
 	}
 }

 enum a3xx_tex_fetchsize
 fd3_pipe2fetchsize(enum pipe_format format)
 {
 	switch (format) {
 	case PIPE_FORMAT_L8_UNORM:
 	case PIPE_FORMAT_A8_UNORM:
 	case PIPE_FORMAT_I8_UNORM:
 		return TFETCH_1_BYTE;

 	case PIPE_FORMAT_Z16_UNORM:
 		return TFETCH_2_BYTE;

 	case PIPE_FORMAT_B8G8R8A8_UNORM:
 	case PIPE_FORMAT_B8G8R8X8_UNORM:
 	case PIPE_FORMAT_R8G8B8A8_UNORM:
 	case PIPE_FORMAT_R8G8B8X8_UNORM:
 	case PIPE_FORMAT_B8G8R8A8_SRGB:
 	case PIPE_FORMAT_B8G8R8X8_SRGB:
 	case PIPE_FORMAT_R8G8B8A8_SRGB:
 	case PIPE_FORMAT_R8G8B8X8_SRGB:
 	case PIPE_FORMAT_Z24X8_UNORM:
 	case PIPE_FORMAT_Z24_UNORM_S8_UINT:
 		return TFETCH_4_BYTE;

 	// TODO add more..

 	default:
 		return TFETCH_DISABLE;  /* safe default */
 	}
 }

 /* convert pipe format to MRT / copydest format used for render-target: */
 enum a3xx_color_fmt
 fd3_pipe2color(enum pipe_format format)
 {
 	switch (format) {
 	case PIPE_FORMAT_B8G8R8A8_UNORM:
 	case PIPE_FORMAT_B8G8R8X8_UNORM:
 	case PIPE_FORMAT_R8G8B8A8_UNORM:
 		return RB_R8G8B8A8_UNORM;

 	case PIPE_FORMAT_Z16_UNORM:
 		return RB_Z16_UNORM;

 	case PIPE_FORMAT_Z24X8_UNORM:
 	case PIPE_FORMAT_Z24_UNORM_S8_UINT:
 		/* for DEPTHX_24_8, blob driver also seems to use R8G8B8A8 fmt.. */
 		return RB_R8G8B8A8_UNORM;

 	case PIPE_FORMAT_R8_UNORM:
 	case PIPE_FORMAT_L8_UNORM:
 		return RB_R8_UNORM;

 	case PIPE_FORMAT_A8_UNORM:
 		return RB_A8_UNORM;

 	case PIPE_FORMAT_R16G16B16A16_FLOAT:
 	case PIPE_FORMAT_R16G16B16X16_FLOAT:
 		return RB_R16G16B16A16_FLOAT;

 	case PIPE_FORMAT_R32G32B32A32_FLOAT:
 	case PIPE_FORMAT_R32G32B32X32_FLOAT:
 		return RB_R32G32B32A32_FLOAT;

 	// TODO add more..

 	default:
 		return ~0;
 	}
 }

 /* we need to special case a bit the depth/stencil restore, because we are
  * using the texture sampler to blit into the depth/stencil buffer, *not*
  * into a color buffer.  Otherwise fd3_tex_swiz() will do the wrong thing,
  * as it is assuming that you are sampling into normal render target..
  */
 enum pipe_format
 fd3_gmem_restore_format(enum pipe_format format)
 {
 	switch (format) {
 	case PIPE_FORMAT_Z24X8_UNORM:
 	case PIPE_FORMAT_Z24_UNORM_S8_UINT:
 		return PIPE_FORMAT_R8G8B8A8_UNORM;
 	case PIPE_FORMAT_Z16_UNORM:
 		return PIPE_FORMAT_R8G8_UNORM;
 	default:
 		return format;
 	}
 }

 enum a3xx_color_swap
 fd3_pipe2swap(enum pipe_format format)
 {
 	switch (format) {
 	case PIPE_FORMAT_B8G8R8A8_UNORM:
 	case PIPE_FORMAT_B8G8R8X8_UNORM:
 	case PIPE_FORMAT_B8G8R8A8_SRGB:
 	case PIPE_FORMAT_B8G8R8X8_SRGB:
 		return WXYZ;

 	case PIPE_FORMAT_A8R8G8B8_UNORM:
 	case PIPE_FORMAT_X8R8G8B8_UNORM:
 	case PIPE_FORMAT_A8R8G8B8_SRGB:
 	case PIPE_FORMAT_X8R8G8B8_SRGB:
 		return ZYXW;

 	case PIPE_FORMAT_A8B8G8R8_UNORM:
 	case PIPE_FORMAT_X8B8G8R8_UNORM:
 	case PIPE_FORMAT_A8B8G8R8_SRGB:
 	case PIPE_FORMAT_X8B8G8R8_SRGB:
 		return XYZW;

 	case PIPE_FORMAT_R8G8B8A8_UNORM:
 	case PIPE_FORMAT_R8G8B8X8_UNORM:
 	case PIPE_FORMAT_Z24X8_UNORM:
 	case PIPE_FORMAT_Z24_UNORM_S8_UINT:
 	default:
 		return WZYX;
 	}
 }

 static inline enum a3xx_tex_swiz
 tex_swiz(unsigned swiz)
 {
 	switch (swiz) {
 	default:
 	case PIPE_SWIZZLE_RED:   return A3XX_TEX_X;
 	case PIPE_SWIZZLE_GREEN: return A3XX_TEX_Y;
 	case PIPE_SWIZZLE_BLUE:  return A3XX_TEX_Z;
 	case PIPE_SWIZZLE_ALPHA: return A3XX_TEX_W;
 	case PIPE_SWIZZLE_ZERO:  return A3XX_TEX_ZERO;
 	case PIPE_SWIZZLE_ONE:   return A3XX_TEX_ONE;
 	}
 }

 uint32_t
 fd3_tex_swiz(enum pipe_format format, unsigned swizzle_r, unsigned swizzle_g,
 		unsigned swizzle_b, unsigned swizzle_a)
 {
 	const struct util_format_description *desc =
 			util_format_description(format);
 	unsigned char swiz[4] = {
 			swizzle_r, swizzle_g, swizzle_b, swizzle_a,
 	}, rswiz[4];

 	util_format_compose_swizzles(desc->swizzle, swiz, rswiz);

 	return A3XX_TEX_CONST_0_SWIZ_X(tex_swiz(rswiz[0])) |
 			A3XX_TEX_CONST_0_SWIZ_Y(tex_swiz(rswiz[1])) |
 			A3XX_TEX_CONST_0_SWIZ_Z(tex_swiz(rswiz[2])) |
 			A3XX_TEX_CONST_0_SWIZ_W(tex_swiz(rswiz[3]));
 }
	/* -- mode: C; c-file-style: "k&r"; tab-width 4; indent-tabs-mode: t; -- */

	/*
	* Copyright (C) 2013 Rob Clark <robclark@freedesktop.org>
	*
	* Permission is hereby granted, free of charge, to any person obtaining a
	* copy of this software and associated documentation files (the "Software"),
	* to deal in the Software without restriction, including without limitation
	* the rights to use, copy, modify, merge, publish, distribute, sublicense,
	* and/or sell copies of the Software, and to permit persons to whom the
	* Software is furnished to do so, subject to the following conditions:
	*
	* The above copyright notice and this permission notice (including the next
	* paragraph) shall be included in all copies or substantial portions of the
	* Software.
	*
	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
	* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
	* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
	* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
	* SOFTWARE.
	*
	* Authors:
	* Rob Clark <robclark@freedesktop.org>
	*/

	#include "pipe/p_defines.h"
	#include "util/u_format.h"

	#include "fd3_util.h"

	/* convert pipe format to vertex buffer format: */
	enum a3xx_vtx_fmt
	fd3_pipe2vtx(enum pipe_format format)
	{
	switch (format) {
	/* 8-bit buffers. */
	case PIPE_FORMAT_R8_UNORM:
	return VFMT_NORM_UBYTE_8;

	case PIPE_FORMAT_R8_SNORM:
	return VFMT_NORM_BYTE_8;

	case PIPE_FORMAT_R8_UINT:
	case PIPE_FORMAT_R8_USCALED:
	return VFMT_UBYTE_8;

	case PIPE_FORMAT_R8_SINT:
	case PIPE_FORMAT_R8_SSCALED:
	return VFMT_BYTE_8;

	/* 16-bit buffers. */
	case PIPE_FORMAT_R16_UNORM:
	case PIPE_FORMAT_Z16_UNORM:
	return VFMT_NORM_USHORT_16;

	case PIPE_FORMAT_R16_SNORM:
	return VFMT_NORM_SHORT_16;

	case PIPE_FORMAT_R16_UINT:
	case PIPE_FORMAT_R16_USCALED:
	return VFMT_USHORT_16;

	case PIPE_FORMAT_R16_SINT:
	case PIPE_FORMAT_R16_SSCALED:
	return VFMT_SHORT_16;

	case PIPE_FORMAT_R16_FLOAT:
	return VFMT_FLOAT_16;

	case PIPE_FORMAT_R8G8_UNORM:
	return VFMT_NORM_UBYTE_8_8;

	case PIPE_FORMAT_R8G8_SNORM:
	return VFMT_NORM_BYTE_8_8;

	case PIPE_FORMAT_R8G8_UINT:
	case PIPE_FORMAT_R8G8_USCALED:
	return VFMT_UBYTE_8_8;

	case PIPE_FORMAT_R8G8_SINT:
	case PIPE_FORMAT_R8G8_SSCALED:
	return VFMT_BYTE_8_8;

	/* 24-bit buffers. */
	case PIPE_FORMAT_R8G8B8_UNORM:
	return VFMT_NORM_UBYTE_8_8_8;

	case PIPE_FORMAT_R8G8B8_SNORM:
	return VFMT_NORM_BYTE_8_8_8;

	case PIPE_FORMAT_R8G8B8_UINT:
	case PIPE_FORMAT_R8G8B8_USCALED:
	return VFMT_UBYTE_8_8_8;

	case PIPE_FORMAT_R8G8B8_SINT:
	case PIPE_FORMAT_R8G8B8_SSCALED:
	return VFMT_BYTE_8_8_8;

	/* 32-bit buffers. */
	case PIPE_FORMAT_A8B8G8R8_UNORM:
	case PIPE_FORMAT_A8R8G8B8_UNORM:
	case PIPE_FORMAT_B8G8R8A8_UNORM:
	case PIPE_FORMAT_R8G8B8A8_UNORM:
	return VFMT_NORM_UBYTE_8_8_8_8;

	case PIPE_FORMAT_R8G8B8A8_SNORM:
	return VFMT_NORM_BYTE_8_8_8_8;

	case PIPE_FORMAT_R8G8B8A8_UINT:
	case PIPE_FORMAT_R8G8B8A8_USCALED:
	return VFMT_UBYTE_8_8_8_8;

	case PIPE_FORMAT_R8G8B8A8_SINT:
	case PIPE_FORMAT_R8G8B8A8_SSCALED:
	return VFMT_BYTE_8_8_8_8;

	case PIPE_FORMAT_R16G16_SSCALED:
	case PIPE_FORMAT_R16G16_SINT:
	return VFMT_SHORT_16_16;

	case PIPE_FORMAT_R16G16_FLOAT:
	return VFMT_FLOAT_16_16;

	case PIPE_FORMAT_R16G16_UINT:
	case PIPE_FORMAT_R16G16_USCALED:
	return VFMT_USHORT_16_16;

	case PIPE_FORMAT_R16G16_UNORM:
	return VFMT_NORM_USHORT_16_16;

	case PIPE_FORMAT_R16G16_SNORM:
	return VFMT_NORM_SHORT_16_16;

	case PIPE_FORMAT_R32_UINT:
	case PIPE_FORMAT_R32_USCALED:
	return VFMT_UINT_32;

	case PIPE_FORMAT_R32_SINT:
	case PIPE_FORMAT_R32_SSCALED:
	return VFMT_INT_32;

	case PIPE_FORMAT_R10G10B10A2_UNORM:
	return VFMT_NORM_UINT_10_10_10_2;

	case PIPE_FORMAT_R10G10B10A2_SNORM:
	return VFMT_NORM_INT_10_10_10_2;

	case PIPE_FORMAT_R10G10B10A2_UINT:
	case PIPE_FORMAT_R10G10B10A2_USCALED:
	return VFMT_UINT_10_10_10_2;

	case PIPE_FORMAT_R10G10B10A2_SSCALED:
	return VFMT_INT_10_10_10_2;

	/* 48-bit buffers. */
	case PIPE_FORMAT_R16G16B16_FLOAT:
	return VFMT_FLOAT_16_16_16;

	case PIPE_FORMAT_R16G16B16_SINT:
	case PIPE_FORMAT_R16G16B16_SSCALED:
	return VFMT_SHORT_16_16_16;

	case PIPE_FORMAT_R16G16B16_UINT:
	case PIPE_FORMAT_R16G16B16_USCALED:
	return VFMT_USHORT_16_16_16;

	case PIPE_FORMAT_R16G16B16_SNORM:
	return VFMT_NORM_SHORT_16_16_16;

	case PIPE_FORMAT_R16G16B16_UNORM:
	return VFMT_NORM_USHORT_16_16_16;

	case PIPE_FORMAT_R32_FLOAT:
	case PIPE_FORMAT_Z32_FLOAT:
	return VFMT_FLOAT_32;

	case PIPE_FORMAT_R32_FIXED:
	return VFMT_FIXED_32;

	/* 64-bit buffers. */
	case PIPE_FORMAT_R16G16B16A16_UNORM:
	return VFMT_NORM_USHORT_16_16_16_16;

	case PIPE_FORMAT_R16G16B16A16_SNORM:
	return VFMT_NORM_SHORT_16_16_16_16;

	case PIPE_FORMAT_R16G16B16A16_UINT:
	case PIPE_FORMAT_R16G16B16A16_USCALED:
	return VFMT_USHORT_16_16_16_16;

	case PIPE_FORMAT_R16G16B16A16_SINT:
	case PIPE_FORMAT_R16G16B16A16_SSCALED:
	return VFMT_SHORT_16_16_16_16;

	case PIPE_FORMAT_R32G32_FLOAT:
	return VFMT_FLOAT_32_32;

	case PIPE_FORMAT_R32G32_FIXED:
	return VFMT_FIXED_32_32;

	case PIPE_FORMAT_R16G16B16A16_FLOAT:
	return VFMT_FLOAT_16_16_16_16;

	case PIPE_FORMAT_R32G32_UINT:
	case PIPE_FORMAT_R32G32_USCALED:
	return VFMT_UINT_32_32;

	case PIPE_FORMAT_R32G32_SINT:
	case PIPE_FORMAT_R32G32_SSCALED:
	return VFMT_INT_32_32;

	/* 96-bit buffers. */
	case PIPE_FORMAT_R32G32B32_FLOAT:
	return VFMT_FLOAT_32_32_32;

	case PIPE_FORMAT_R32G32B32_FIXED:
	return VFMT_FIXED_32_32_32;

	case PIPE_FORMAT_R32G32B32_UINT:
	case PIPE_FORMAT_R32G32B32_USCALED:
	return VFMT_UINT_32_32_32;

	case PIPE_FORMAT_R32G32B32_SINT:
	case PIPE_FORMAT_R32G32B32_SSCALED:
	return VFMT_INT_32_32_32;

	/* 128-bit buffers. */
	case PIPE_FORMAT_R32G32B32A32_FLOAT:
	return VFMT_FLOAT_32_32_32_32;

	case PIPE_FORMAT_R32G32B32A32_FIXED:
	return VFMT_FIXED_32_32_32_32;

	case PIPE_FORMAT_R32G32B32A32_UINT:
	case PIPE_FORMAT_R32G32B32A32_USCALED:
	return VFMT_UINT_32_32_32_32;

	case PIPE_FORMAT_R32G32B32A32_SINT:
	case PIPE_FORMAT_R32G32B32A32_SSCALED:
	return VFMT_INT_32_32_32_32;

	/* TODO normalized 32bit int formats do not appear to be supported
	* natively.. will require either shader variant or VFD_DECODE
	* gymnastics like the blob driver does..
	case PIPE_FORMAT_R32G32B32A32_SNORM:
	case PIPE_FORMAT_R32G32B32A32_UNORM:
	*/

	default:
	return ~0;
	}
	}

	/* convert pipe format to texture sampler format: */
	enum a3xx_tex_fmt
	fd3_pipe2tex(enum pipe_format format)
	{
	switch (format) {
	case PIPE_FORMAT_L8_UNORM:
	case PIPE_FORMAT_A8_UNORM:
	case PIPE_FORMAT_I8_UNORM:
	return TFMT_NORM_UINT_8;

	case PIPE_FORMAT_R8G8_UNORM:
	return TFMT_NORM_UINT_8_8;

	case PIPE_FORMAT_B8G8R8A8_UNORM:
	case PIPE_FORMAT_B8G8R8X8_UNORM:
	case PIPE_FORMAT_R8G8B8A8_UNORM:
	case PIPE_FORMAT_R8G8B8X8_UNORM:
	case PIPE_FORMAT_B8G8R8A8_SRGB:
	case PIPE_FORMAT_B8G8R8X8_SRGB:
	case PIPE_FORMAT_R8G8B8A8_SRGB:
	case PIPE_FORMAT_R8G8B8X8_SRGB:
	return TFMT_NORM_UINT_8_8_8_8;

	case PIPE_FORMAT_Z24X8_UNORM:
	case PIPE_FORMAT_Z24_UNORM_S8_UINT:
	return TFMT_NORM_UINT_X8Z24;

	case PIPE_FORMAT_Z16_UNORM:
	return TFMT_NORM_USHORT_Z16;

	case PIPE_FORMAT_R16G16B16A16_FLOAT:
	case PIPE_FORMAT_R16G16B16X16_FLOAT:
	return TFMT_FLOAT_16_16_16_16;

	case PIPE_FORMAT_R32G32B32A32_FLOAT:
	case PIPE_FORMAT_R32G32B32X32_FLOAT:
	return TFMT_FLOAT_32_32_32_32;

	// TODO add more..

	default:
	return ~0;
	}
	}

	enum a3xx_tex_fetchsize
	fd3_pipe2fetchsize(enum pipe_format format)
	{
	switch (format) {
	case PIPE_FORMAT_L8_UNORM:
	case PIPE_FORMAT_A8_UNORM:
	case PIPE_FORMAT_I8_UNORM:
	return TFETCH_1_BYTE;

	case PIPE_FORMAT_Z16_UNORM:
	return TFETCH_2_BYTE;

	case PIPE_FORMAT_B8G8R8A8_UNORM:
	case PIPE_FORMAT_B8G8R8X8_UNORM:
	case PIPE_FORMAT_R8G8B8A8_UNORM:
	case PIPE_FORMAT_R8G8B8X8_UNORM:
	case PIPE_FORMAT_B8G8R8A8_SRGB:
	case PIPE_FORMAT_B8G8R8X8_SRGB:
	case PIPE_FORMAT_R8G8B8A8_SRGB:
	case PIPE_FORMAT_R8G8B8X8_SRGB:
	case PIPE_FORMAT_Z24X8_UNORM:
	case PIPE_FORMAT_Z24_UNORM_S8_UINT:
	return TFETCH_4_BYTE;

	// TODO add more..

	default:
	return TFETCH_DISABLE; /* safe default */
	}
	}

	/* convert pipe format to MRT / copydest format used for render-target: */
	enum a3xx_color_fmt
	fd3_pipe2color(enum pipe_format format)
	{
	switch (format) {
	case PIPE_FORMAT_B8G8R8A8_UNORM:
	case PIPE_FORMAT_B8G8R8X8_UNORM:
	case PIPE_FORMAT_R8G8B8A8_UNORM:
	return RB_R8G8B8A8_UNORM;

	case PIPE_FORMAT_Z16_UNORM:
	return RB_Z16_UNORM;

	case PIPE_FORMAT_Z24X8_UNORM:
	case PIPE_FORMAT_Z24_UNORM_S8_UINT:
	/* for DEPTHX_24_8, blob driver also seems to use R8G8B8A8 fmt.. */
	return RB_R8G8B8A8_UNORM;

	case PIPE_FORMAT_R8_UNORM:
	case PIPE_FORMAT_L8_UNORM:
	return RB_R8_UNORM;

	case PIPE_FORMAT_A8_UNORM:
	return RB_A8_UNORM;

	case PIPE_FORMAT_R16G16B16A16_FLOAT:
	case PIPE_FORMAT_R16G16B16X16_FLOAT:
	return RB_R16G16B16A16_FLOAT;

	case PIPE_FORMAT_R32G32B32A32_FLOAT:
	case PIPE_FORMAT_R32G32B32X32_FLOAT:
	return RB_R32G32B32A32_FLOAT;

	// TODO add more..

	default:
	return ~0;
	}
	}

	/* we need to special case a bit the depth/stencil restore, because we are
	* using the texture sampler to blit into the depth/stencil buffer, not
	* into a color buffer. Otherwise fd3_tex_swiz() will do the wrong thing,
	* as it is assuming that you are sampling into normal render target..
	*/
	enum pipe_format
	fd3_gmem_restore_format(enum pipe_format format)
	{
	switch (format) {
	case PIPE_FORMAT_Z24X8_UNORM:
	case PIPE_FORMAT_Z24_UNORM_S8_UINT:
	return PIPE_FORMAT_R8G8B8A8_UNORM;
	case PIPE_FORMAT_Z16_UNORM:
	return PIPE_FORMAT_R8G8_UNORM;
	default:
	return format;
	}
	}

	enum a3xx_color_swap
	fd3_pipe2swap(enum pipe_format format)
	{
	switch (format) {
	case PIPE_FORMAT_B8G8R8A8_UNORM:
	case PIPE_FORMAT_B8G8R8X8_UNORM:
	case PIPE_FORMAT_B8G8R8A8_SRGB:
	case PIPE_FORMAT_B8G8R8X8_SRGB:
	return WXYZ;

	case PIPE_FORMAT_A8R8G8B8_UNORM:
	case PIPE_FORMAT_X8R8G8B8_UNORM:
	case PIPE_FORMAT_A8R8G8B8_SRGB:
	case PIPE_FORMAT_X8R8G8B8_SRGB:
	return ZYXW;

	case PIPE_FORMAT_A8B8G8R8_UNORM:
	case PIPE_FORMAT_X8B8G8R8_UNORM:
	case PIPE_FORMAT_A8B8G8R8_SRGB:
	case PIPE_FORMAT_X8B8G8R8_SRGB:
	return XYZW;

	case PIPE_FORMAT_R8G8B8A8_UNORM:
	case PIPE_FORMAT_R8G8B8X8_UNORM:
	case PIPE_FORMAT_Z24X8_UNORM:
	case PIPE_FORMAT_Z24_UNORM_S8_UINT:
	default:
	return WZYX;
	}
	}

	static inline enum a3xx_tex_swiz
	tex_swiz(unsigned swiz)
	{
	switch (swiz) {
	default:
	case PIPE_SWIZZLE_RED: return A3XX_TEX_X;
	case PIPE_SWIZZLE_GREEN: return A3XX_TEX_Y;
	case PIPE_SWIZZLE_BLUE: return A3XX_TEX_Z;
	case PIPE_SWIZZLE_ALPHA: return A3XX_TEX_W;
	case PIPE_SWIZZLE_ZERO: return A3XX_TEX_ZERO;
	case PIPE_SWIZZLE_ONE: return A3XX_TEX_ONE;
	}
	}

	uint32_t
	fd3_tex_swiz(enum pipe_format format, unsigned swizzle_r, unsigned swizzle_g,
	unsigned swizzle_b, unsigned swizzle_a)
	{
	const struct util_format_description *desc =
	util_format_description(format);
	unsigned char swiz[4] = {
	swizzle_r, swizzle_g, swizzle_b, swizzle_a,
	}, rswiz[4];

	util_format_compose_swizzles(desc->swizzle, swiz, rswiz);

	return A3XX_TEX_CONST_0_SWIZ_X(tex_swiz(rswiz[0])) \|
	A3XX_TEX_CONST_0_SWIZ_Y(tex_swiz(rswiz[1])) \|
	A3XX_TEX_CONST_0_SWIZ_Z(tex_swiz(rswiz[2])) \|
	A3XX_TEX_CONST_0_SWIZ_W(tex_swiz(rswiz[3]));
	}