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Gimp/plug-ins/file-dds/formats.c
Jacob Boerema 3ee85e422b plug-ins: fix #13107 failure to read exported grayscale DDS image 
When exporting a grayscale image with alpha channel as DDS while
choosing "default" format, we did not set the DDPF_LUMINANCE flag,
but instead used DDPF_RGB, on loading in the 3.0 branch this caused
a failure to read this format due to unrecognized combination of
settings.

First we make sure that on exporting to also set DDPF_LUMINANCE for
grayscale with alpha.
Second we also make sure to zero the blue and green mask fields,
since that is the expected value when these fields are not used.

To support this type of older exported DDS images, we add an extra
format definition for this unusual combination of DDS settings,
that way we recognize them when opening and are able to load them.
2025-03-14 12:23:42 -04:00

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/*
* DDS GIMP plugin
*
* Copyright (C) 2004-2012 Shawn Kirst <skirst@gmail.com>,
* with parts (C) 2003 Arne Reuter <homepage@arnereuter.de> where specified.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include <libgimp/gimp.h>
#include "dds.h"
#include "formats.h"
/* Table that determines how uncompressed D3D9 and DXGI formats are read and parsed */
static const fmt_read_info_t format_read_info[] =
{/*|D3D Format |DXGI Format |Order |Channel Bits |bpp|Alpha |Float |Signed|GIMP Type */
{ D3DFMT_R8G8B8, DXGI_FORMAT_UNKNOWN, {2,1,0,3}, { 8, 8, 8, 0}, 8, FALSE, FALSE, FALSE, GIMP_RGB },
{ D3DFMT_A8R8G8B8, DXGI_FORMAT_UNKNOWN, {2,1,0,3}, { 8, 8, 8, 8}, 8, TRUE, FALSE, FALSE, GIMP_RGB },
{ D3DFMT_X8R8G8B8, DXGI_FORMAT_UNKNOWN, {2,1,0,3}, { 8, 8, 8, 8}, 8, FALSE, FALSE, FALSE, GIMP_RGB },
{ D3DFMT_R5G6B5, DXGI_FORMAT_UNKNOWN, {2,1,0,3}, { 5, 6, 5, 0}, 8, FALSE, FALSE, FALSE, GIMP_RGB },
{ D3DFMT_X1R5G5B5, DXGI_FORMAT_UNKNOWN, {2,1,0,3}, { 5, 5, 5, 1}, 8, FALSE, FALSE, FALSE, GIMP_RGB },
{ D3DFMT_A1R5G5B5, DXGI_FORMAT_UNKNOWN, {2,1,0,3}, { 5, 5, 5, 1}, 8, TRUE, FALSE, FALSE, GIMP_RGB },
{ D3DFMT_A4R4G4B4, DXGI_FORMAT_UNKNOWN, {2,1,0,3}, { 4, 4, 4, 4}, 8, TRUE, FALSE, FALSE, GIMP_RGB },
{ D3DFMT_R3G3B2, DXGI_FORMAT_UNKNOWN, {2,1,0,3}, { 2, 3, 3, 0}, 8, FALSE, FALSE, FALSE, GIMP_RGB },
{ D3DFMT_A8, DXGI_FORMAT_UNKNOWN, {3,2,1,0}, { 8, 0, 0, 0}, 8, TRUE, FALSE, FALSE, GIMP_GRAY },
{ D3DFMT_A8R3G3B2, DXGI_FORMAT_UNKNOWN, {2,1,0,3}, { 2, 3, 3, 8}, 8, TRUE, FALSE, FALSE, GIMP_RGB },
{ D3DFMT_X4R4G4B4, DXGI_FORMAT_UNKNOWN, {2,1,0,3}, { 4, 4, 4, 4}, 8, FALSE, FALSE, FALSE, GIMP_RGB },
{ D3DFMT_A2B10G10R10, DXGI_FORMAT_UNKNOWN, {2,1,0,3}, {10,10,10, 2}, 16, TRUE, FALSE, FALSE, GIMP_RGB },
{ D3DFMT_A8B8G8R8, DXGI_FORMAT_UNKNOWN, {0,1,2,3}, { 8, 8, 8, 8}, 8, TRUE, FALSE, FALSE, GIMP_RGB },
{ D3DFMT_X8B8G8R8, DXGI_FORMAT_UNKNOWN, {0,1,2,3}, { 8, 8, 8, 8}, 8, FALSE, FALSE, FALSE, GIMP_RGB },
{ D3DFMT_G16R16, DXGI_FORMAT_UNKNOWN, {0,1,2,3}, {16,16, 0, 0}, 16, FALSE, FALSE, FALSE, GIMP_RGB },
{ D3DFMT_A2R10G10B10, DXGI_FORMAT_UNKNOWN, {0,1,2,3}, {10,10,10, 2}, 16, TRUE, FALSE, FALSE, GIMP_RGB },
{ D3DFMT_A16B16G16R16, DXGI_FORMAT_UNKNOWN, {0,1,2,3}, {16,16,16,16}, 16, TRUE, FALSE, FALSE, GIMP_RGB },
{ D3DFMT_A8P8, DXGI_FORMAT_UNKNOWN, {0,3,2,1}, { 8, 8, 0, 0}, 8, TRUE, FALSE, FALSE, GIMP_INDEXED },
{ D3DFMT_P8, DXGI_FORMAT_UNKNOWN, {0,1,2,3}, { 8, 0, 0, 0}, 8, FALSE, FALSE, FALSE, GIMP_INDEXED },
{ D3DFMT_L8, DXGI_FORMAT_UNKNOWN, {0,3,2,1}, { 8, 0, 0, 0}, 8, FALSE, FALSE, FALSE, GIMP_GRAY },
{ D3DFMT_A8L8, DXGI_FORMAT_UNKNOWN, {0,3,2,1}, { 8, 8, 0, 0}, 8, TRUE, FALSE, FALSE, GIMP_GRAY },
{ D3DFMT_A4L4, DXGI_FORMAT_UNKNOWN, {0,3,2,1}, { 4, 4, 0, 0}, 8, TRUE, FALSE, FALSE, GIMP_GRAY },
{ D3DFMT_V8U8, DXGI_FORMAT_UNKNOWN, {0,1,2,3}, { 8, 8, 0, 0}, 8, FALSE, FALSE, TRUE, GIMP_RGB },
{ D3DFMT_L6V5U5, DXGI_FORMAT_UNKNOWN, {0,1,2,3}, { 5, 5, 6, 0}, 8, FALSE, FALSE, TRUE, GIMP_RGB },
{ D3DFMT_X8L8V8U8, DXGI_FORMAT_UNKNOWN, {0,1,2,3}, { 8, 8, 8, 8}, 8, FALSE, FALSE, TRUE, GIMP_RGB },
{ D3DFMT_Q8W8V8U8, DXGI_FORMAT_UNKNOWN, {0,1,2,3}, { 8, 8, 8, 8}, 8, TRUE, FALSE, TRUE, GIMP_RGB },
{ D3DFMT_V16U16, DXGI_FORMAT_UNKNOWN, {0,1,2,3}, {16,16, 0, 0}, 16, FALSE, FALSE, TRUE, GIMP_RGB },
{ D3DFMT_A2W10V10U10, DXGI_FORMAT_UNKNOWN, {0,1,2,3}, {10,10,10, 2}, 16, TRUE, FALSE, TRUE, GIMP_RGB },
{ D3DFMT_D16_LOCKABLE, DXGI_FORMAT_UNKNOWN, {0,1,2,3}, {16, 0, 0, 0}, 16, FALSE, FALSE, FALSE, GIMP_GRAY },
{ D3DFMT_D32, DXGI_FORMAT_UNKNOWN, {0,1,2,3}, {32, 0, 0, 0}, 32, FALSE, FALSE, FALSE, GIMP_GRAY },
{ D3DFMT_D15S1, DXGI_FORMAT_UNKNOWN, {0,1,2,3}, {15, 1, 0, 0}, 16, FALSE, FALSE, FALSE, GIMP_RGB },
{ D3DFMT_D24S8, DXGI_FORMAT_UNKNOWN, {0,1,2,3}, {24, 8, 0, 0}, 32, FALSE, FALSE, FALSE, GIMP_RGB },
{ D3DFMT_D24X8, DXGI_FORMAT_UNKNOWN, {0,1,2,3}, {24, 8, 0, 0}, 32, FALSE, FALSE, FALSE, GIMP_RGB },
{ D3DFMT_D24X4S4, DXGI_FORMAT_UNKNOWN, {0,1,2,3}, {24, 4, 4, 0}, 32, FALSE, FALSE, FALSE, GIMP_RGB },
{ D3DFMT_D16, DXGI_FORMAT_UNKNOWN, {1,0,2,3}, {16, 0, 0, 0}, 16, FALSE, FALSE, FALSE, GIMP_GRAY },
{ D3DFMT_L16, DXGI_FORMAT_UNKNOWN, {0,1,2,3}, {16, 0, 0, 0}, 16, FALSE, FALSE, FALSE, GIMP_GRAY },
{ D3DFMT_D32F_LOCKABLE, DXGI_FORMAT_UNKNOWN, {0,1,2,3}, {32, 0, 0, 0}, 32, FALSE, TRUE, TRUE, GIMP_GRAY },
{ D3DFMT_D24FS8, DXGI_FORMAT_UNKNOWN, {0,1,2,3}, {24, 8, 0, 0}, 32, FALSE, TRUE, TRUE, GIMP_RGB },
{ D3DFMT_D32_LOCKABLE, DXGI_FORMAT_UNKNOWN, {0,1,2,3}, {32, 0, 0, 0}, 32, FALSE, FALSE, FALSE, GIMP_GRAY },
{ D3DFMT_S8_LOCKABLE, DXGI_FORMAT_UNKNOWN, {0,1,2,3}, { 8, 0, 0, 0}, 8, FALSE, FALSE, FALSE, GIMP_GRAY },
{ D3DFMT_Q16W16V16U16, DXGI_FORMAT_UNKNOWN, {0,1,2,3}, {16,16,16,16}, 16, TRUE, FALSE, TRUE, GIMP_RGB },
{ D3DFMT_R16F, DXGI_FORMAT_UNKNOWN, {0,1,2,3}, {16, 0, 0, 0}, 16, FALSE, TRUE, TRUE, GIMP_GRAY },
{ D3DFMT_G16R16F, DXGI_FORMAT_UNKNOWN, {0,1,2,3}, {16,16, 0, 0}, 16, FALSE, TRUE, TRUE, GIMP_RGB },
{ D3DFMT_A16B16G16R16F, DXGI_FORMAT_UNKNOWN, {0,1,2,3}, {16,16,16,16}, 16, TRUE, TRUE, TRUE, GIMP_RGB },
{ D3DFMT_R32F, DXGI_FORMAT_UNKNOWN, {0,1,2,3}, {32, 0, 0, 0}, 32, FALSE, TRUE, TRUE, GIMP_GRAY },
{ D3DFMT_G32R32F, DXGI_FORMAT_UNKNOWN, {0,1,2,3}, {32,32, 0, 0}, 32, FALSE, TRUE, TRUE, GIMP_RGB },
{ D3DFMT_A32B32G32R32F, DXGI_FORMAT_UNKNOWN, {0,1,2,3}, {32,32,32,32}, 32, TRUE, TRUE, TRUE, GIMP_RGB },
{ D3DFMT_CxV8U8, DXGI_FORMAT_UNKNOWN, {0,1,2,3}, { 8, 8, 0, 0}, 8, FALSE, FALSE, TRUE, GIMP_RGB },
{ D3DFMT_A1, DXGI_FORMAT_UNKNOWN, {3,2,1,0}, { 1, 0, 0, 0}, 8, TRUE, FALSE, FALSE, GIMP_GRAY },
/* Older GIMP wrote this when exporting to BGR8 */
{ D3DFMT_B8G8R8, DXGI_FORMAT_UNKNOWN, {0,1,2,3}, { 8, 8, 8, 0}, 8, FALSE, FALSE, FALSE, GIMP_RGB },
{ D3DFMT_UNKNOWN, DXGI_FORMAT_R32G32B32A32_FLOAT, {0,1,2,3}, {32,32,32,32}, 32, TRUE, TRUE, TRUE, GIMP_RGB },
{ D3DFMT_UNKNOWN, DXGI_FORMAT_R32G32B32A32_UINT, {0,1,2,3}, {32,32,32,32}, 32, TRUE, FALSE, FALSE, GIMP_RGB },
{ D3DFMT_UNKNOWN, DXGI_FORMAT_R32G32B32A32_SINT, {0,1,2,3}, {32,32,32,32}, 32, TRUE, FALSE, TRUE, GIMP_RGB },
{ D3DFMT_UNKNOWN, DXGI_FORMAT_R32G32B32_FLOAT, {0,1,2,3}, {32,32,32, 0}, 32, FALSE, TRUE, TRUE, GIMP_RGB },
{ D3DFMT_UNKNOWN, DXGI_FORMAT_R32G32B32_UINT, {0,1,2,3}, {32,32,32, 0}, 32, FALSE, FALSE, FALSE, GIMP_RGB },
{ D3DFMT_UNKNOWN, DXGI_FORMAT_R32G32B32_SINT, {0,1,2,3}, {32,32,32, 0}, 32, FALSE, FALSE, TRUE, GIMP_RGB },
{ D3DFMT_UNKNOWN, DXGI_FORMAT_R16G16B16A16_FLOAT, {0,1,2,3}, {16,16,16,16}, 16, TRUE, TRUE, TRUE, GIMP_RGB },
{ D3DFMT_UNKNOWN, DXGI_FORMAT_R16G16B16A16_UNORM, {0,1,2,3}, {16,16,16,16}, 16, TRUE, FALSE, FALSE, GIMP_RGB },
{ D3DFMT_UNKNOWN, DXGI_FORMAT_R16G16B16A16_UINT, {0,1,2,3}, {16,16,16,16}, 16, TRUE, FALSE, FALSE, GIMP_RGB },
{ D3DFMT_UNKNOWN, DXGI_FORMAT_R16G16B16A16_SNORM, {0,1,2,3}, {16,16,16,16}, 16, TRUE, FALSE, TRUE, GIMP_RGB },
{ D3DFMT_UNKNOWN, DXGI_FORMAT_R16G16B16A16_SINT, {0,1,2,3}, {16,16,16,16}, 16, TRUE, FALSE, TRUE, GIMP_RGB },
{ D3DFMT_UNKNOWN, DXGI_FORMAT_R32G32_FLOAT, {0,1,2,3}, {32,32, 0, 0}, 32, FALSE, TRUE, TRUE, GIMP_RGB },
{ D3DFMT_UNKNOWN, DXGI_FORMAT_R32G32_UINT, {0,1,2,3}, {32,32, 0, 0}, 32, FALSE, FALSE, FALSE, GIMP_RGB },
{ D3DFMT_UNKNOWN, DXGI_FORMAT_R32G32_SINT, {0,1,2,3}, {32,32, 0, 0}, 32, FALSE, FALSE, TRUE, GIMP_RGB },
{ D3DFMT_UNKNOWN, DXGI_FORMAT_D32_FLOAT_S8X24_UINT, {0,1,2,3}, {32, 8,24, 0}, 32, FALSE, TRUE, TRUE, GIMP_RGB },
{ D3DFMT_UNKNOWN, DXGI_FORMAT_R10G10B10A2_UNORM, {0,1,2,3}, {10,10,10, 2}, 16, TRUE, FALSE, FALSE, GIMP_RGB },
{ D3DFMT_UNKNOWN, DXGI_FORMAT_R10G10B10A2_UINT, {0,1,2,3}, {10,10,10, 2}, 16, TRUE, FALSE, FALSE, GIMP_RGB },
{ D3DFMT_UNKNOWN, DXGI_FORMAT_R11G11B10_FLOAT, {0,1,2,3}, {11,11,10, 0}, 16, FALSE, TRUE, FALSE, GIMP_RGB },
{ D3DFMT_UNKNOWN, DXGI_FORMAT_R8G8B8A8_UNORM, {0,1,2,3}, { 8, 8, 8, 8}, 8, TRUE, FALSE, FALSE, GIMP_RGB },
{ D3DFMT_UNKNOWN, DXGI_FORMAT_R8G8B8A8_UNORM_SRGB, {0,1,2,3}, { 8, 8, 8, 8}, 8, TRUE, FALSE, FALSE, GIMP_RGB },
{ D3DFMT_UNKNOWN, DXGI_FORMAT_R8G8B8A8_UINT, {0,1,2,3}, { 8, 8, 8, 8}, 8, TRUE, FALSE, FALSE, GIMP_RGB },
{ D3DFMT_UNKNOWN, DXGI_FORMAT_R8G8B8A8_SNORM, {0,1,2,3}, { 8, 8, 8, 8}, 8, TRUE, FALSE, TRUE, GIMP_RGB },
{ D3DFMT_UNKNOWN, DXGI_FORMAT_R8G8B8A8_SINT, {0,1,2,3}, { 8, 8, 8, 8}, 8, TRUE, FALSE, TRUE, GIMP_RGB },
{ D3DFMT_UNKNOWN, DXGI_FORMAT_R16G16_FLOAT, {0,1,2,3}, {16,16, 0, 0}, 16, FALSE, TRUE, TRUE, GIMP_RGB },
{ D3DFMT_UNKNOWN, DXGI_FORMAT_R16G16_UNORM, {0,1,2,3}, {16,16, 0, 0}, 16, FALSE, FALSE, FALSE, GIMP_RGB },
{ D3DFMT_UNKNOWN, DXGI_FORMAT_R16G16_UINT, {0,1,2,3}, {16,16, 0, 0}, 16, FALSE, FALSE, FALSE, GIMP_RGB },
{ D3DFMT_UNKNOWN, DXGI_FORMAT_R16G16_SNORM, {0,1,2,3}, {16,16, 0, 0}, 16, FALSE, FALSE, TRUE, GIMP_RGB },
{ D3DFMT_UNKNOWN, DXGI_FORMAT_R16G16_SINT, {0,1,2,3}, {16,16, 0, 0}, 16, FALSE, FALSE, TRUE, GIMP_RGB },
{ D3DFMT_UNKNOWN, DXGI_FORMAT_D32_FLOAT, {0,1,2,3}, {32, 0, 0, 0}, 32, FALSE, TRUE, TRUE, GIMP_GRAY },
{ D3DFMT_UNKNOWN, DXGI_FORMAT_R32_FLOAT, {0,1,2,3}, {32, 0, 0, 0}, 32, FALSE, TRUE, TRUE, GIMP_GRAY },
{ D3DFMT_UNKNOWN, DXGI_FORMAT_R32_UINT, {0,1,2,3}, {32, 0, 0, 0}, 32, FALSE, FALSE, FALSE, GIMP_GRAY },
{ D3DFMT_UNKNOWN, DXGI_FORMAT_R32_SINT, {0,1,2,3}, {32, 0, 0, 0}, 32, FALSE, FALSE, TRUE, GIMP_GRAY },
{ D3DFMT_UNKNOWN, DXGI_FORMAT_D24_UNORM_S8_UINT, {0,1,2,3}, {24, 8, 0, 0}, 32, FALSE, FALSE, FALSE, GIMP_RGB },
{ D3DFMT_UNKNOWN, DXGI_FORMAT_R8G8_UNORM, {0,1,2,3}, { 8, 8, 0, 0}, 8, FALSE, FALSE, FALSE, GIMP_RGB },
{ D3DFMT_UNKNOWN, DXGI_FORMAT_R8G8_UINT, {0,1,2,3}, { 8, 8, 0, 0}, 8, FALSE, FALSE, FALSE, GIMP_RGB },
{ D3DFMT_UNKNOWN, DXGI_FORMAT_R8G8_SNORM, {0,1,2,3}, { 8, 8, 0, 0}, 8, FALSE, FALSE, TRUE, GIMP_RGB },
{ D3DFMT_UNKNOWN, DXGI_FORMAT_R8G8_SINT, {0,1,2,3}, { 8, 8, 0, 0}, 8, FALSE, FALSE, TRUE, GIMP_RGB },
{ D3DFMT_UNKNOWN, DXGI_FORMAT_R16_FLOAT, {0,1,2,3}, {16, 0, 0, 0}, 16, FALSE, TRUE, TRUE, GIMP_GRAY },
{ D3DFMT_UNKNOWN, DXGI_FORMAT_D16_UNORM, {0,1,2,3}, {16, 0, 0, 0}, 16, FALSE, FALSE, FALSE, GIMP_GRAY },
{ D3DFMT_UNKNOWN, DXGI_FORMAT_R16_UNORM, {0,1,2,3}, {16, 0, 0, 0}, 16, FALSE, FALSE, FALSE, GIMP_GRAY },
{ D3DFMT_UNKNOWN, DXGI_FORMAT_R16_UINT, {0,1,2,3}, {16, 0, 0, 0}, 16, FALSE, FALSE, FALSE, GIMP_GRAY },
{ D3DFMT_UNKNOWN, DXGI_FORMAT_R16_SNORM, {0,1,2,3}, {16, 0, 0, 0}, 16, FALSE, FALSE, TRUE, GIMP_GRAY },
{ D3DFMT_UNKNOWN, DXGI_FORMAT_R16_SINT, {0,1,2,3}, {16, 0, 0, 0}, 16, FALSE, FALSE, TRUE, GIMP_GRAY },
{ D3DFMT_UNKNOWN, DXGI_FORMAT_R8_UNORM, {0,1,2,3}, { 8, 0, 0, 0}, 8, FALSE, FALSE, FALSE, GIMP_GRAY },
{ D3DFMT_UNKNOWN, DXGI_FORMAT_R8_UINT, {0,1,2,3}, { 8, 0, 0, 0}, 8, FALSE, FALSE, FALSE, GIMP_GRAY },
{ D3DFMT_UNKNOWN, DXGI_FORMAT_R8_SNORM, {0,1,2,3}, { 8, 0, 0, 0}, 8, FALSE, FALSE, TRUE, GIMP_GRAY },
{ D3DFMT_UNKNOWN, DXGI_FORMAT_R8_SINT, {0,1,2,3}, { 8, 0, 0, 0}, 8, FALSE, FALSE, TRUE, GIMP_GRAY },
{ D3DFMT_UNKNOWN, DXGI_FORMAT_A8_UNORM, {3,2,1,0}, { 8, 0, 0, 0}, 8, TRUE, FALSE, FALSE, GIMP_GRAY },
{ D3DFMT_UNKNOWN, DXGI_FORMAT_R9G9B9E5_SHAREDEXP, {0,1,2,3}, { 9, 9, 9, 5}, 32, FALSE, TRUE, FALSE, GIMP_RGB },
{ D3DFMT_UNKNOWN, DXGI_FORMAT_B5G6R5_UNORM, {0,1,2,3}, { 5, 6, 5, 0}, 8, FALSE, FALSE, FALSE, GIMP_RGB },
{ D3DFMT_UNKNOWN, DXGI_FORMAT_B5G5R5A1_UNORM, {0,1,2,3}, { 5, 5, 5, 1}, 8, TRUE, FALSE, FALSE, GIMP_RGB },
{ D3DFMT_UNKNOWN, DXGI_FORMAT_B8G8R8A8_UNORM, {2,1,0,3}, { 8, 8, 8, 8}, 8, TRUE, FALSE, FALSE, GIMP_RGB },
{ D3DFMT_UNKNOWN, DXGI_FORMAT_B8G8R8X8_UNORM, {2,1,0,3}, { 8, 8, 8, 8}, 8, FALSE, FALSE, FALSE, GIMP_RGB },
{ D3DFMT_UNKNOWN, DXGI_FORMAT_B8G8R8A8_UNORM_SRGB, {2,1,0,3}, { 8, 8, 8, 8}, 8, TRUE, FALSE, FALSE, GIMP_RGB },
{ D3DFMT_UNKNOWN, DXGI_FORMAT_B8G8R8X8_UNORM_SRGB, {2,1,0,3}, { 8, 8, 8, 8}, 8, FALSE, FALSE, FALSE, GIMP_RGB },
{ D3DFMT_UNKNOWN, DXGI_FORMAT_P8, {0,1,2,3}, { 8, 0, 0, 0}, 8, FALSE, FALSE, FALSE, GIMP_INDEXED },
{ D3DFMT_UNKNOWN, DXGI_FORMAT_A8P8, {0,1,2,3}, { 8, 8, 0, 0}, 8, TRUE, FALSE, FALSE, GIMP_INDEXED },
{ D3DFMT_UNKNOWN, DXGI_FORMAT_B4G4R4A4_UNORM, {2,1,0,3}, { 4, 4, 4, 4}, 8, TRUE, FALSE, FALSE, GIMP_RGB },
{ D3DFMT_UNKNOWN, DXGI_FORMAT_R10G10B10_7E3_A2_FLOAT, {0,1,2,3}, {10,10,10, 2}, 32, TRUE, TRUE, FALSE, GIMP_RGB },
{ D3DFMT_UNKNOWN, DXGI_FORMAT_R10G10B10_6E4_A2_FLOAT, {0,1,2,3}, {10,10,10, 2}, 32, TRUE, TRUE, FALSE, GIMP_RGB },
{ D3DFMT_UNKNOWN, DXGI_FORMAT_D16_UNORM_S8_UINT, {0,1,2,3}, {16, 8, 0, 0}, 16, FALSE, FALSE, FALSE, GIMP_RGB },
{ D3DFMT_UNKNOWN, DXGI_FORMAT_R16_UNORM_X8_TYPELESS, {0,1,2,3}, {16, 8, 0, 0}, 16, FALSE, FALSE, FALSE, GIMP_RGB },
{ D3DFMT_UNKNOWN, DXGI_FORMAT_X16_TYPELESS_G8_UINT, {0,1,2,3}, {16, 8, 0, 0}, 16, FALSE, FALSE, FALSE, GIMP_RGB },
{ D3DFMT_UNKNOWN, DXGI_FORMAT_R10G10B10_SNORM_A2_UNORM, {0,1,2,3}, {10,10,10, 2}, 16, TRUE, FALSE, TRUE, GIMP_RGB },
{ D3DFMT_UNKNOWN, DXGI_FORMAT_R4G4_UNORM, {0,1,2,3}, { 4, 4, 0, 0}, 8, FALSE, FALSE, FALSE, GIMP_RGB },
{ D3DFMT_UNKNOWN, DXGI_FORMAT_A4B4G4R4_UNORM, {3,2,1,0}, { 4, 4, 4, 4}, 8, TRUE, FALSE, FALSE, GIMP_RGB },
};
#define FORMAT_READ_INFO_COUNT (sizeof (format_read_info) / sizeof (fmt_read_info_t))
/* Table for mapping bpp, mask, and flag values to D3D9 format codes */
static struct _FMT_MAP
{
D3DFORMAT d3d9_format;
gint bpp;
guint rmask;
guint gmask;
guint bmask;
guint amask;
guint flags;
} format_map[] =
{/*|D3D Format |bpp|R Mask |G Mask |B Mask |A Mask |Flags */
{ D3DFMT_R8G8B8, 24, 0x00FF0000, 0x0000FF00, 0x000000FF, 0x00000000, DDPF_RGB },
{ D3DFMT_A8R8G8B8, 32, 0x00FF0000, 0x0000FF00, 0x000000FF, 0xFF000000, DDPF_RGB | DDPF_ALPHAPIXELS },
{ D3DFMT_X8R8G8B8, 32, 0x00FF0000, 0x0000FF00, 0x000000FF, 0x00000000, DDPF_RGB },
{ D3DFMT_R5G6B5, 16, 0x0000F800, 0x000007E0, 0x0000001F, 0x00000000, DDPF_RGB },
{ D3DFMT_X1R5G5B5, 16, 0x00007C00, 0x000003E0, 0x0000001F, 0x00000000, DDPF_RGB },
{ D3DFMT_A1R5G5B5, 16, 0x00007C00, 0x000003E0, 0x0000001F, 0x00008000, DDPF_RGB | DDPF_ALPHAPIXELS },
{ D3DFMT_A4R4G4B4, 16, 0x00000F00, 0x000000F0, 0x0000000F, 0x0000F000, DDPF_RGB | DDPF_ALPHAPIXELS },
{ D3DFMT_R3G3B2, 8, 0x000000E0, 0x0000001C, 0x00000003, 0x00000000, DDPF_RGB },
{ D3DFMT_A8, 8, 0x00000000, 0x00000000, 0x00000000, 0x000000FF, DDPF_ALPHA },
{ D3DFMT_A8R3G3B2, 16, 0x000000E0, 0x0000001C, 0x00000003, 0x0000FF00, DDPF_RGB | DDPF_ALPHAPIXELS },
{ D3DFMT_X4R4G4B4, 16, 0x00000F00, 0x000000F0, 0x0000000F, 0x00000000, DDPF_RGB },
{ D3DFMT_A2B10G10R10, 32, 0x000003FF, 0x000FFC00, 0x3FF00000, 0xC0000000, DDPF_RGB | DDPF_ALPHAPIXELS },
{ D3DFMT_A8B8G8R8, 32, 0x000000FF, 0x0000FF00, 0x00FF0000, 0xFF000000, DDPF_RGB | DDPF_ALPHAPIXELS },
{ D3DFMT_X8B8G8R8, 32, 0x000000FF, 0x0000FF00, 0x00FF0000, 0x00000000, DDPF_RGB },
{ D3DFMT_G16R16, 32, 0x0000FFFF, 0xFFFF0000, 0x00000000, 0x00000000, DDPF_RGB },
{ D3DFMT_A2R10G10B10, 32, 0x3FF00000, 0x000FFC00, 0x000003FF, 0xC0000000, DDPF_RGB | DDPF_ALPHAPIXELS },
{ D3DFMT_A8P8, 16, 0x00000000, 0x00000000, 0x00000000, 0x0000FF00, DDPF_PALETTEINDEXED8 | DDPF_ALPHAPIXELS },
{ D3DFMT_P8, 8, 0x00000000, 0x00000000, 0x00000000, 0x00000000, DDPF_PALETTEINDEXED8 },
{ D3DFMT_L8, 8, 0x000000FF, 0x00000000, 0x00000000, 0x00000000, DDPF_LUMINANCE },
{ D3DFMT_A8L8, 16, 0x000000FF, 0x00000000, 0x00000000, 0x0000FF00, DDPF_LUMINANCE | DDPF_ALPHAPIXELS },
{ D3DFMT_A4L4, 8, 0x0000000F, 0x00000000, 0x00000000, 0x000000F0, DDPF_LUMINANCE | DDPF_ALPHAPIXELS },
{ D3DFMT_UNKNOWN, 16, 0x000000FF, 0x0000FF00, 0x00000000, 0x00000000, DDPF_RGB },
{ D3DFMT_V8U8, 16, 0x000000FF, 0x0000FF00, 0x00000000, 0x00000000, DDPF_BUMPDUDV },
{ D3DFMT_L6V5U5, 16, 0x0000001F, 0x000003E0, 0x0000FC00, 0x00000000, DDPF_BUMPLUMINANCE },
{ D3DFMT_X8L8V8U8, 32, 0x000000FF, 0x0000FF00, 0x00FF0000, 0x00000000, DDPF_BUMPLUMINANCE },
{ D3DFMT_Q8W8V8U8, 32, 0x000000FF, 0x0000FF00, 0x00FF0000, 0xFF000000, DDPF_BUMPDUDV },
{ D3DFMT_V16U16, 32, 0x0000FFFF, 0xFFFF0000, 0x00000000, 0x00000000, DDPF_BUMPDUDV },
{ D3DFMT_A2W10V10U10, 32, 0x3FF00000, 0x000FFC00, 0x000003FF, 0xC0000000, DDPF_BUMPDUDV | DDPF_ALPHAPIXELS },
{ D3DFMT_D16_LOCKABLE, 16, 0x00000000, 0x0000FFFF, 0x00000000, 0x00000000, DDPF_ZBUFFER },
{ D3DFMT_L16, 16, 0x0000FFFF, 0x00000000, 0x00000000, 0x00000000, DDPF_LUMINANCE },
/* NVTT v1 wrote these with DDPF_RGB instead of DDPF_LUMINANCE */
{ D3DFMT_L8, 8, 0x000000FF, 0x00000000, 0x00000000, 0x00000000, DDPF_RGB },
{ D3DFMT_A8L8, 16, 0x000000FF, 0x00000000, 0x00000000, 0x0000FF00, DDPF_RGB | DDPF_ALPHAPIXELS },
{ D3DFMT_L16, 16, 0x0000FFFF, 0x00000000, 0x00000000, 0x00000000, DDPF_RGB },
/* Older versions of GIMP wrote these */
{ D3DFMT_B8G8R8, 24, 0x000000FF, 0x0000FF00, 0x00FF0000, 0x00000000, DDPF_RGB },
{ D3DFMT_L8, 8, 0x000000FF, 0x000000FF, 0x000000FF, 0x00000000, DDPF_LUMINANCE },
{ D3DFMT_A8L8, 16, 0x000000FF, 0x000000FF, 0x000000FF, 0x0000FF00, DDPF_LUMINANCE | DDPF_ALPHAPIXELS },
{ D3DFMT_A8L8, 16, 0x000000FF, 0x000000FF, 0x000000FF, 0x0000FF00, DDPF_RGB | DDPF_ALPHAPIXELS },
};
#define FORMAT_MAP_COUNT (sizeof (format_map) / sizeof (format_map[0]))
/*
* Get D3DFORMAT code that matches input bpp, masks, and flags
*/
guint
get_d3d9format (guint bpp,
guint rmask,
guint gmask,
guint bmask,
guint amask,
guint flags)
{
for (gint i = 0; i < FORMAT_MAP_COUNT; i++)
{
if (format_map[i].bpp == bpp &&
format_map[i].rmask == rmask &&
format_map[i].gmask == gmask &&
format_map[i].bmask == bmask &&
format_map[i].amask == amask &&
(format_map[i].flags & flags) == format_map[i].flags)
{
return format_map[i].d3d9_format;
}
}
return D3DFMT_UNKNOWN;
}
/*
* Check that uncompressed DXGI format is supported
*/
gboolean
dxgiformat_supported (guint hdr_dxgifmt)
{
for (gint i = 0; i < FORMAT_READ_INFO_COUNT; i++)
{
if (format_read_info[i].dxgi_format == hdr_dxgifmt)
{
return TRUE;
}
}
return FALSE;
}
/*
* Get read info from D3D9 or DXGI format code
*/
fmt_read_info_t
get_format_read_info (guint d3d9_fmt,
guint dxgi_fmt)
{
gint index = 0;
for (gint i = 0; i < FORMAT_READ_INFO_COUNT; i++)
{
if ((d3d9_fmt && (format_read_info[i].d3d9_format == d3d9_fmt)) ||
(dxgi_fmt && (format_read_info[i].dxgi_format == dxgi_fmt)))
{
index = i;
break;
}
}
return format_read_info[index];
}
/*
* Convert integer component from input size to output size (up to 32 bits)
* Brute-force high-precision float method for minimum possible error
*/
guint32
requantize_component (guint32 bits,
guchar size_in,
guchar size_out)
{
if (size_in == size_out)
return bits;
return (guint) ((gdouble) bits * ((gdouble) ((1ULL << size_out) - 1)
/ (gdouble) ((1ULL << size_in ) - 1)) + 0.5);
}
/* Special float handling for R9G9B9E5
* https://microsoft.github.io/DirectX-Specs/d3d/archive/D3D11_3_FunctionalSpec.htm
*/
void
float_from_9e5 (guint32 channels[4])
{
for (gint ch = 0; ch < 3; ch++)
{
gfloat val_f = (gfloat) exp2 ((gdouble) ((gint32) channels[3] - 15))
* ((gdouble) channels[ch] / exp2 (9.0));
memcpy (&channels[ch], &val_f, 4);
}
}
/* Special float handling for R10G10B10_7E3_A2
* https://github.com/microsoft/DirectXTex/blob/main/DirectXTex/DirectXTexConvert.cpp
*/
void
float_from_7e3a2 (guint32 channels[4])
{
gint64 mantissa;
gint64 exponent;
gfloat alpha;
for (gint ch = 0; ch < 3; ch++)
{
mantissa = channels[ch] & 0x0000007F;
exponent = channels[ch] & 0x00000380;
if (exponent != 0) /* The value is normalized */
{
exponent = (channels[ch] >> 7) & 0x00000007;
}
else if (mantissa != 0) /* The value is denormalized */
{
/* Normalize the value in the resulting float */
exponent = 1;
do
{
exponent--;
mantissa <<= 1;
}
while ((mantissa & 0x80) == 0);
mantissa &= 0x7F;
}
else /* The value is zero */
{
exponent = -124;
}
channels[ch] = (guint32) (((exponent + 124) << 23) | (mantissa << 16));
}
alpha = (gfloat) channels[3] * (1.0f / 3.0f);
memcpy (&channels[3], &alpha, 4);
}
/* Special float handling for R10G10B10_6E4_A2
* https://github.com/microsoft/DirectXTex/blob/main/DirectXTex/DirectXTexConvert.cpp
*/
void
float_from_6e4a2 (guint32 channels[4])
{
gint64 mantissa;
gint64 exponent;
gfloat alpha;
for (gint ch = 0; ch < 3; ch++)
{
mantissa = channels[ch] & 0x0000003F;
exponent = channels[ch] & 0x000003C0;
if (exponent != 0) /* The value is normalized */
{
exponent = (channels[ch] >> 6) & 0x0000000F;
}
else if (mantissa != 0) /* The value is denormalized */
{
/* Normalize the value in the resulting float */
exponent = 1;
do
{
exponent--;
mantissa <<= 1;
}
while ((mantissa & 0x40) == 0);
mantissa &= 0x3F;
}
else /* The value is zero */
{
exponent = -120;
}
channels[ch] = (guint32) (((exponent + 120) << 23) | (mantissa << 17));
}
alpha = (gfloat) channels[3] * (1.0f / 3.0f);
memcpy (&channels[3], &alpha, 4);
}
/* Special handling for CxV8U8
* Z-component is reconstructed from X and Y
*/
void
reconstruct_z (guint32 channels[4])
{
gchar ch_u, ch_v, ch_c;
gfloat ch_uf, ch_vf;
memcpy (&ch_u, &channels[0], 1);
memcpy (&ch_v, &channels[1], 1);
ch_uf = (gfloat) ch_u / 127.0f;
ch_vf = (gfloat) ch_v / 127.0f;
ch_c = (gchar) (sqrtf (1.0f - (ch_uf * ch_uf + ch_vf * ch_vf)) * 127.0f);
memcpy (&channels[2], &ch_c, 1);
}
/*
* Get input bits-per-pixel from D3D9 format
*/
gsize
get_bpp_d3d9 (guint fmt)
{
switch (fmt)
{
case D3DFMT_A32B32G32R32F:
return 128;
case D3DFMT_A16B16G16R16:
case D3DFMT_Q16W16V16U16:
case D3DFMT_A16B16G16R16F:
case D3DFMT_G32R32F:
return 64;
case D3DFMT_A8R8G8B8:
case D3DFMT_X8R8G8B8:
case D3DFMT_A2B10G10R10:
case D3DFMT_A8B8G8R8:
case D3DFMT_X8B8G8R8:
case D3DFMT_G16R16:
case D3DFMT_A2R10G10B10:
case D3DFMT_Q8W8V8U8:
case D3DFMT_V16U16:
case D3DFMT_X8L8V8U8:
case D3DFMT_A2W10V10U10:
case D3DFMT_D32:
case D3DFMT_D24S8:
case D3DFMT_D24X8:
case D3DFMT_D24X4S4:
case D3DFMT_D32F_LOCKABLE:
case D3DFMT_D24FS8:
case D3DFMT_INDEX32:
case D3DFMT_G16R16F:
case D3DFMT_R32F:
case D3DFMT_D32_LOCKABLE:
return 32;
case D3DFMT_R8G8B8:
case D3DFMT_B8G8R8:
return 24;
case D3DFMT_A4R4G4B4:
case D3DFMT_X4R4G4B4:
case D3DFMT_R5G6B5:
case D3DFMT_L16:
case D3DFMT_A8L8:
case D3DFMT_X1R5G5B5:
case D3DFMT_A1R5G5B5:
case D3DFMT_A8R3G3B2:
case D3DFMT_V8U8:
case D3DFMT_CxV8U8:
case D3DFMT_L6V5U5:
case D3DFMT_D16_LOCKABLE:
case D3DFMT_D15S1:
case D3DFMT_D16:
case D3DFMT_INDEX16:
case D3DFMT_R16F:
return 16;
case D3DFMT_R3G3B2:
case D3DFMT_A8:
case D3DFMT_A8P8:
case D3DFMT_P8:
case D3DFMT_L8:
case D3DFMT_A4L4:
case D3DFMT_S8_LOCKABLE:
return 8;
case D3DFMT_A1:
return 1;
default:
return 0;
}
}
/*
* Get input bits-per-pixel from DXGI format
*/
gsize
get_bpp_dxgi (guint fmt)
{
switch (fmt)
{
case DXGI_FORMAT_R32G32B32A32_TYPELESS:
case DXGI_FORMAT_R32G32B32A32_FLOAT:
case DXGI_FORMAT_R32G32B32A32_UINT:
case DXGI_FORMAT_R32G32B32A32_SINT:
return 128;
case DXGI_FORMAT_R32G32B32_TYPELESS:
case DXGI_FORMAT_R32G32B32_FLOAT:
case DXGI_FORMAT_R32G32B32_UINT:
case DXGI_FORMAT_R32G32B32_SINT:
return 96;
case DXGI_FORMAT_R16G16B16A16_TYPELESS:
case DXGI_FORMAT_R16G16B16A16_FLOAT:
case DXGI_FORMAT_R16G16B16A16_UNORM:
case DXGI_FORMAT_R16G16B16A16_UINT:
case DXGI_FORMAT_R16G16B16A16_SNORM:
case DXGI_FORMAT_R16G16B16A16_SINT:
case DXGI_FORMAT_R32G32_TYPELESS:
case DXGI_FORMAT_R32G32_FLOAT:
case DXGI_FORMAT_R32G32_UINT:
case DXGI_FORMAT_R32G32_SINT:
case DXGI_FORMAT_R32G8X24_TYPELESS:
case DXGI_FORMAT_D32_FLOAT_S8X24_UINT:
case DXGI_FORMAT_R32_FLOAT_X8X24_TYPELESS:
case DXGI_FORMAT_X32_TYPELESS_G8X24_UINT:
case DXGI_FORMAT_Y416:
case DXGI_FORMAT_Y210:
case DXGI_FORMAT_Y216:
return 64;
case DXGI_FORMAT_R10G10B10A2_TYPELESS:
case DXGI_FORMAT_R10G10B10A2_UNORM:
case DXGI_FORMAT_R10G10B10A2_UINT:
case DXGI_FORMAT_R11G11B10_FLOAT:
case DXGI_FORMAT_R8G8B8A8_TYPELESS:
case DXGI_FORMAT_R8G8B8A8_UNORM:
case DXGI_FORMAT_R8G8B8A8_UNORM_SRGB:
case DXGI_FORMAT_R8G8B8A8_UINT:
case DXGI_FORMAT_R8G8B8A8_SNORM:
case DXGI_FORMAT_R8G8B8A8_SINT:
case DXGI_FORMAT_R16G16_TYPELESS:
case DXGI_FORMAT_R16G16_FLOAT:
case DXGI_FORMAT_R16G16_UNORM:
case DXGI_FORMAT_R16G16_UINT:
case DXGI_FORMAT_R16G16_SNORM:
case DXGI_FORMAT_R16G16_SINT:
case DXGI_FORMAT_R32_TYPELESS:
case DXGI_FORMAT_D32_FLOAT:
case DXGI_FORMAT_R32_FLOAT:
case DXGI_FORMAT_R32_UINT:
case DXGI_FORMAT_R32_SINT:
case DXGI_FORMAT_R24G8_TYPELESS:
case DXGI_FORMAT_D24_UNORM_S8_UINT:
case DXGI_FORMAT_R24_UNORM_X8_TYPELESS:
case DXGI_FORMAT_X24_TYPELESS_G8_UINT:
case DXGI_FORMAT_R9G9B9E5_SHAREDEXP:
case DXGI_FORMAT_R8G8_B8G8_UNORM:
case DXGI_FORMAT_G8R8_G8B8_UNORM:
case DXGI_FORMAT_B8G8R8A8_UNORM:
case DXGI_FORMAT_B8G8R8X8_UNORM:
case DXGI_FORMAT_R10G10B10_XR_BIAS_A2_UNORM:
case DXGI_FORMAT_B8G8R8A8_TYPELESS:
case DXGI_FORMAT_B8G8R8A8_UNORM_SRGB:
case DXGI_FORMAT_B8G8R8X8_TYPELESS:
case DXGI_FORMAT_B8G8R8X8_UNORM_SRGB:
case DXGI_FORMAT_AYUV:
case DXGI_FORMAT_Y410:
case DXGI_FORMAT_YUY2:
case DXGI_FORMAT_R10G10B10_7E3_A2_FLOAT:
case DXGI_FORMAT_R10G10B10_6E4_A2_FLOAT:
case DXGI_FORMAT_R10G10B10_SNORM_A2_UNORM:
return 32;
case DXGI_FORMAT_P010:
case DXGI_FORMAT_P016:
case DXGI_FORMAT_D16_UNORM_S8_UINT:
case DXGI_FORMAT_R16_UNORM_X8_TYPELESS:
case DXGI_FORMAT_X16_TYPELESS_G8_UINT:
case DXGI_FORMAT_V408:
return 24;
case DXGI_FORMAT_R8G8_TYPELESS:
case DXGI_FORMAT_R8G8_UNORM:
case DXGI_FORMAT_R8G8_UINT:
case DXGI_FORMAT_R8G8_SNORM:
case DXGI_FORMAT_R8G8_SINT:
case DXGI_FORMAT_R16_TYPELESS:
case DXGI_FORMAT_R16_FLOAT:
case DXGI_FORMAT_D16_UNORM:
case DXGI_FORMAT_R16_UNORM:
case DXGI_FORMAT_R16_UINT:
case DXGI_FORMAT_R16_SNORM:
case DXGI_FORMAT_R16_SINT:
case DXGI_FORMAT_B5G6R5_UNORM:
case DXGI_FORMAT_B5G5R5A1_UNORM:
case DXGI_FORMAT_A8P8:
case DXGI_FORMAT_B4G4R4A4_UNORM:
case DXGI_FORMAT_P208:
case DXGI_FORMAT_V208:
case DXGI_FORMAT_A4B4G4R4_UNORM:
return 16;
case DXGI_FORMAT_NV12:
case DXGI_FORMAT_420_OPAQUE:
case DXGI_FORMAT_NV11:
return 12;
case DXGI_FORMAT_R8_TYPELESS:
case DXGI_FORMAT_R8_UNORM:
case DXGI_FORMAT_R8_UINT:
case DXGI_FORMAT_R8_SNORM:
case DXGI_FORMAT_R8_SINT:
case DXGI_FORMAT_A8_UNORM:
case DXGI_FORMAT_BC2_TYPELESS:
case DXGI_FORMAT_BC2_UNORM:
case DXGI_FORMAT_BC2_UNORM_SRGB:
case DXGI_FORMAT_BC3_TYPELESS:
case DXGI_FORMAT_BC3_UNORM:
case DXGI_FORMAT_BC3_UNORM_SRGB:
case DXGI_FORMAT_BC5_TYPELESS:
case DXGI_FORMAT_BC5_UNORM:
case DXGI_FORMAT_BC5_SNORM:
case DXGI_FORMAT_BC6H_TYPELESS:
case DXGI_FORMAT_BC6H_UF16:
case DXGI_FORMAT_BC6H_SF16:
case DXGI_FORMAT_BC7_TYPELESS:
case DXGI_FORMAT_BC7_UNORM:
case DXGI_FORMAT_BC7_UNORM_SRGB:
case DXGI_FORMAT_AI44:
case DXGI_FORMAT_IA44:
case DXGI_FORMAT_P8:
case DXGI_FORMAT_R4G4_UNORM:
return 8;
case DXGI_FORMAT_BC1_TYPELESS:
case DXGI_FORMAT_BC1_UNORM:
case DXGI_FORMAT_BC1_UNORM_SRGB:
case DXGI_FORMAT_BC4_TYPELESS:
case DXGI_FORMAT_BC4_UNORM:
case DXGI_FORMAT_BC4_SNORM:
return 4;
case DXGI_FORMAT_R1_UNORM:
return 1;
default:
return 0;
}
}
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