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gimp/plug-ins/file-dds/ddsread.c

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Import Upstream version 2.10.32
2022-11-23 10:54:48 +08:00
/*
* 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 2 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; see the file COPYING. If not, write to
* the Free Software Foundation, 51 Franklin Street, Fifth Floor
* Boston, MA 02110-1301, USA.
*/
/*
** !!! COPYRIGHT NOTICE !!!
**
** The following is based on code (C) 2003 Arne Reuter <homepage@arnereuter.de>
** URL: http://www.dr-reuter.de/arne/dds.html
**
*/
#include "config.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <gtk/gtk.h>
#include <glib/gstdio.h>
#include <libgimp/gimp.h>
#include <libgimp/gimpui.h>
#include <libgimp/stdplugins-intl.h>
#include "ddsplugin.h"
#include "dds.h"
#include "dxt.h"
#include "endian_rw.h"
#include "misc.h"
#include "imath.h"
typedef struct
{
unsigned char rshift, gshift, bshift, ashift;
unsigned char rbits, gbits, bbits, abits;
unsigned int rmask, gmask, bmask, amask;
unsigned int bpp, gimp_bpp;
unsigned int gimp_bps; /* bytes per sample */
int tile_height;
unsigned char *palette;
} dds_load_info_t;
static int read_header (dds_header_t *hdr,
FILE *fp);
static int read_header_dx10 (dds_header_dx10_t *hdr,
FILE *fp);
static int validate_header (dds_header_t *hdr);
static int setup_dxgi_format (dds_header_t *hdr,
dds_header_dx10_t *dx10hdr);
static int load_layer (FILE *fp,
dds_header_t *hdr,
dds_load_info_t *d,
gint32 image,
unsigned int level,
char *prefix,
unsigned int *l,
guchar *pixels,
unsigned char *buf);
static int load_mipmaps (FILE *fp,
dds_header_t *hdr,
dds_load_info_t *d,
gint32 image,
char *prefix,
unsigned int *l,
guchar *pixels,
unsigned char *buf);
static int load_face (FILE *fp,
dds_header_t *hdr,
dds_load_info_t *d,
gint32 image,
char *prefix,
unsigned int *l,
guchar *pixels,
unsigned char *buf);
static unsigned char color_bits (unsigned int mask);
static unsigned char color_shift (unsigned int mask);
static int load_dialog (void);
static gboolean runme = FALSE;
GimpPDBStatusType
read_dds (gchar *filename,
gint32 *imageID,
gboolean interactive_dds)
{
gint32 image = 0;
unsigned char *buf;
unsigned int l = 0;
guchar *pixels;
gchar *tmp;
FILE *fp;
dds_header_t hdr;
dds_header_dx10_t dx10hdr;
dds_load_info_t d;
gint *layers, layer_count;
GimpImageBaseType type;
GimpPrecision precision;
int i, j;
if (interactive_dds)
{
if (!load_dialog ())
return GIMP_PDB_CANCEL;
}
fp = g_fopen (filename, "rb");
if (fp == 0)
{
g_message ("Error opening file.\n");
return GIMP_PDB_EXECUTION_ERROR;
}
if (strrchr (filename, '/'))
tmp = g_strdup_printf ("Loading %s:", strrchr (filename, '/') + 1);
else
tmp = g_strdup_printf ("Loading %s:", filename);
gimp_progress_init (tmp);
g_free (tmp);
/* read header */
read_header (&hdr, fp);
memset (&dx10hdr, 0, sizeof (dds_header_dx10_t));
/* read DX10 header if necessary */
if (GETL32(hdr.pixelfmt.fourcc) == FOURCC ('D','X','1','0'))
{
read_header_dx10(&dx10hdr, fp);
if (!setup_dxgi_format (&hdr, &dx10hdr))
{
fclose (fp);
return GIMP_PDB_EXECUTION_ERROR;
}
}
if (!validate_header (&hdr))
{
fclose (fp);
g_message ("Invalid DDS header!\n");
return GIMP_PDB_EXECUTION_ERROR;
}
/* a lot of DDS images out there don't have this for some reason -_- */
if (hdr.pitch_or_linsize == 0)
{
if (hdr.pixelfmt.flags & DDPF_FOURCC) /* assume linear size */
{
hdr.pitch_or_linsize = ((hdr.width + 3) >> 2) * ((hdr.height + 3) >> 2);
switch (GETL32(hdr.pixelfmt.fourcc))
{
case FOURCC ('D','X','T','1'):
case FOURCC ('A','T','I','1'):
case FOURCC ('B','C','4','U'):
case FOURCC ('B','C','4','S'):
hdr.pitch_or_linsize *= 8;
break;
default:
hdr.pitch_or_linsize *= 16;
break;
}
}
else /* assume pitch */
{
hdr.pitch_or_linsize = hdr.height * hdr.width * (hdr.pixelfmt.bpp >> 3);
}
}
if (hdr.pixelfmt.flags & DDPF_FOURCC)
{
/* fourcc is dXt* or rXgb */
if (hdr.pixelfmt.fourcc[1] == 'X')
hdr.pixelfmt.flags |= DDPF_ALPHAPIXELS;
}
d.gimp_bps = 1; /* Most formats will be converted to 1 byte per sample */
if (hdr.pixelfmt.flags & DDPF_FOURCC)
{
switch (GETL32(hdr.pixelfmt.fourcc))
{
case FOURCC ('A','T','I','1'):
case FOURCC ('B','C','4','U'):
case FOURCC ('B','C','4','S'):
d.bpp = d.gimp_bpp = 1;
type = GIMP_GRAY;
break;
case FOURCC ('A','T','I','2'):
case FOURCC ('B','C','5','U'):
case FOURCC ('B','C','5','S'):
d.bpp = d.gimp_bpp = 3;
type = GIMP_RGB;
break;
default:
d.bpp = d.gimp_bpp = 4;
type = GIMP_RGB;
break;
}
}
else
{
d.bpp = hdr.pixelfmt.bpp >> 3;
if (d.bpp == 2)
{
if (hdr.pixelfmt.amask == 0xf000) // RGBA4
{
d.gimp_bpp = 4;
type = GIMP_RGB;
}
else if (hdr.pixelfmt.amask == 0xff00) //L8A8
{
d.gimp_bpp = 2;
type = GIMP_GRAY;
}
else if (hdr.pixelfmt.bmask == 0x1f) //R5G6B5 or RGB5A1
{
if (hdr.pixelfmt.amask == 0x8000) // RGB5A1
d.gimp_bpp = 4;
else
d.gimp_bpp = 3;
type = GIMP_RGB;
}
else if (hdr.pixelfmt.rmask == 0xffff) /* L16 */
{
d.gimp_bpp = 2;
d.gimp_bps = 2;
type = GIMP_GRAY;
}
else
{
g_message ("Unsupported uncompressed dds format: "
"bpp: %d, Rmask: %x, Gmask: %x, Bmask: %x, Amask: %x",
hdr.pixelfmt.bpp,
hdr.pixelfmt.rmask, hdr.pixelfmt.gmask,
hdr.pixelfmt.bmask, hdr.pixelfmt.amask);
return GIMP_PDB_EXECUTION_ERROR;
}
}
else
{
if (hdr.pixelfmt.flags & DDPF_PALETTEINDEXED8)
{
type = GIMP_INDEXED;
d.gimp_bpp = 1;
}
else if (hdr.pixelfmt.rmask == 0xe0) // R3G3B2
{
type = GIMP_RGB;
d.gimp_bpp = 3;
}
else
{
/* test alpha only image */
if (d.bpp == 1 && (hdr.pixelfmt.flags & DDPF_ALPHA))
{
d.gimp_bpp = 2;
type = GIMP_GRAY;
}
else
{
d.gimp_bpp = d.bpp;
type = (d.bpp == 1) ? GIMP_GRAY : GIMP_RGB;
}
}
}
}
if (d.gimp_bps == 2)
{
precision = GIMP_PRECISION_U16_GAMMA;
}
else
{
precision = GIMP_PRECISION_U8_GAMMA;
}
image = gimp_image_new_with_precision (hdr.width, hdr.height, type, precision);
if (image == -1)
{
g_message ("Can't allocate new image.\n");
fclose (fp);
return GIMP_PDB_EXECUTION_ERROR;
}
gimp_image_set_filename (image, filename);
if (hdr.pixelfmt.flags & DDPF_PALETTEINDEXED8)
{
d.palette = g_malloc (256 * 4);
if (fread (d.palette, 1, 1024, fp) != 1024)
{
g_message ("Error reading palette.\n");
fclose (fp);
gimp_image_delete (image);
return GIMP_PDB_EXECUTION_ERROR;
}
for (i = j = 0; i < 768; i += 3, j += 4)
{
d.palette[i + 0] = d.palette[j + 0];
d.palette[i + 1] = d.palette[j + 1];
d.palette[i + 2] = d.palette[j + 2];
}
gimp_image_set_colormap (image, d.palette, 256);
}
d.tile_height = gimp_tile_height ();
pixels = g_new (guchar, d.tile_height * hdr.width * d.gimp_bpp);
buf = g_malloc (hdr.pitch_or_linsize);
d.rshift = color_shift (hdr.pixelfmt.rmask);
d.gshift = color_shift (hdr.pixelfmt.gmask);
d.bshift = color_shift (hdr.pixelfmt.bmask);
d.ashift = color_shift (hdr.pixelfmt.amask);
d.rbits = color_bits (hdr.pixelfmt.rmask);
d.gbits = color_bits (hdr.pixelfmt.gmask);
d.bbits = color_bits (hdr.pixelfmt.bmask);
d.abits = color_bits (hdr.pixelfmt.amask);
d.rmask = (hdr.pixelfmt.rmask >> d.rshift) << (8 - d.rbits);
d.gmask = (hdr.pixelfmt.gmask >> d.gshift) << (8 - d.gbits);
d.bmask = (hdr.pixelfmt.bmask >> d.bshift) << (8 - d.bbits);
d.amask = (hdr.pixelfmt.amask >> d.ashift) << (8 - d.abits);
if (!(hdr.caps.caps2 & DDSCAPS2_CUBEMAP) &&
!(hdr.caps.caps2 & DDSCAPS2_VOLUME) &&
dx10hdr.arraySize == 0)
{
if (!load_layer (fp, &hdr, &d, image, 0, "", &l, pixels, buf))
{
fclose (fp);
gimp_image_delete (image);
return GIMP_PDB_EXECUTION_ERROR;
}
if (!load_mipmaps (fp, &hdr, &d, image, "", &l, pixels, buf))
{
fclose (fp);
gimp_image_delete (image);
return GIMP_PDB_EXECUTION_ERROR;
}
}
else if (hdr.caps.caps2 & DDSCAPS2_CUBEMAP)
{
if ((hdr.caps.caps2 & DDSCAPS2_CUBEMAP_POSITIVEX) &&
!load_face (fp, &hdr, &d, image, "(positive x)", &l, pixels, buf))
{
fclose (fp);
gimp_image_delete (image);
return GIMP_PDB_EXECUTION_ERROR;
}
if ((hdr.caps.caps2 & DDSCAPS2_CUBEMAP_NEGATIVEX) &&
!load_face (fp, &hdr, &d, image, "(negative x)", &l, pixels, buf))
{
fclose (fp);
gimp_image_delete (image);
return GIMP_PDB_EXECUTION_ERROR;
}
if ((hdr.caps.caps2 & DDSCAPS2_CUBEMAP_POSITIVEY) &&
!load_face (fp, &hdr, &d, image, "(positive y)", &l, pixels, buf))
{
fclose (fp);
gimp_image_delete (image);
return GIMP_PDB_EXECUTION_ERROR;
}
if ((hdr.caps.caps2 & DDSCAPS2_CUBEMAP_NEGATIVEY) &&
!load_face (fp, &hdr, &d, image, "(negative y)", &l, pixels, buf))
{
fclose (fp);
gimp_image_delete (image);
return GIMP_PDB_EXECUTION_ERROR;
}
if ((hdr.caps.caps2 & DDSCAPS2_CUBEMAP_POSITIVEZ) &&
!load_face (fp, &hdr, &d, image, "(positive z)", &l, pixels, buf))
{
fclose (fp);
gimp_image_delete (image);
return GIMP_PDB_EXECUTION_ERROR;
}
if ((hdr.caps.caps2 & DDSCAPS2_CUBEMAP_NEGATIVEZ) &&
!load_face (fp, &hdr, &d, image, "(negative z)", &l, pixels, buf))
{
fclose (fp);
gimp_image_delete (image);
return GIMP_PDB_EXECUTION_ERROR;
}
}
else if ((hdr.caps.caps2 & DDSCAPS2_VOLUME) &&
(hdr.flags & DDSD_DEPTH))
{
unsigned int i, level;
char *plane;
for (i = 0; i < hdr.depth; ++i)
{
plane = g_strdup_printf ("(z = %d)", i);
if (!load_layer (fp, &hdr, &d, image, 0, plane, &l, pixels, buf))
{
g_free (plane);
fclose (fp);
gimp_image_delete (image);
return GIMP_PDB_EXECUTION_ERROR;
}
g_free (plane);
}
if ((hdr.flags & DDSD_MIPMAPCOUNT) &&
(hdr.caps.caps1 & DDSCAPS_MIPMAP) &&
(dds_read_vals.mipmaps != 0))
{
for (level = 1; level < hdr.num_mipmaps; ++level)
{
int n = hdr.depth >> level;
if (n < 1) n = 1;
for (i = 0; i < n; ++i)
{
plane = g_strdup_printf ("(z = %d)", i);
if (!load_layer (fp, &hdr, &d, image, level, plane, &l, pixels, buf))
{
g_free (plane);
fclose (fp);
gimp_image_delete (image);
return GIMP_PDB_EXECUTION_ERROR;
}
g_free (plane);
}
}
}
}
else if (dx10hdr.arraySize > 0)
{
unsigned int i;
char *elem;
for (i = 0; i < dx10hdr.arraySize; ++i)
{
elem = g_strdup_printf ("(array element %d)", i);
if (!load_layer (fp, &hdr, &d, image, 0, elem, &l, pixels, buf))
{
fclose (fp);
gimp_image_delete (image);
return GIMP_PDB_EXECUTION_ERROR;
}
if (!load_mipmaps (fp, &hdr, &d, image, elem, &l, pixels, buf))
{
fclose (fp);
gimp_image_delete (image);
return GIMP_PDB_EXECUTION_ERROR;
}
g_free (elem);
}
}
gimp_progress_update (1.0);
if (hdr.pixelfmt.flags & DDPF_PALETTEINDEXED8)
g_free (d.palette);
g_free (buf);
g_free (pixels);
fclose (fp);
layers = gimp_image_get_layers (image, &layer_count);
if (layers == NULL || layer_count == 0)
{
g_message ("Oops! NULL image read! Please report this!");
return GIMP_PDB_EXECUTION_ERROR;
}
gimp_image_set_active_layer (image, layers[0]);
g_free (layers);
*imageID = image;
return GIMP_PDB_SUCCESS;
}
static int
read_header (dds_header_t *hdr,
FILE *fp)
{
unsigned char buf[DDS_HEADERSIZE];
memset (hdr, 0, sizeof (dds_header_t));
if (fread (buf, 1, DDS_HEADERSIZE, fp) != DDS_HEADERSIZE)
return 0;
hdr->magic = GETL32(buf);
hdr->size = GETL32(buf + 4);
hdr->flags = GETL32(buf + 8);
hdr->height = GETL32(buf + 12);
hdr->width = GETL32(buf + 16);
hdr->pitch_or_linsize = GETL32(buf + 20);
hdr->depth = GETL32(buf + 24);
hdr->num_mipmaps = GETL32(buf + 28);
hdr->pixelfmt.size = GETL32(buf + 76);
hdr->pixelfmt.flags = GETL32(buf + 80);
hdr->pixelfmt.fourcc[0] = buf[84];
hdr->pixelfmt.fourcc[1] = buf[85];
hdr->pixelfmt.fourcc[2] = buf[86];
hdr->pixelfmt.fourcc[3] = buf[87];
hdr->pixelfmt.bpp = GETL32(buf + 88);
hdr->pixelfmt.rmask = GETL32(buf + 92);
hdr->pixelfmt.gmask = GETL32(buf + 96);
hdr->pixelfmt.bmask = GETL32(buf + 100);
hdr->pixelfmt.amask = GETL32(buf + 104);
hdr->caps.caps1 = GETL32(buf + 108);
hdr->caps.caps2 = GETL32(buf + 112);
/* GIMP-DDS special info */
if (GETL32(buf + 32) == FOURCC ('G','I','M','P') &&
GETL32(buf + 36) == FOURCC ('-','D','D','S'))
{
hdr->reserved.gimp_dds_special.magic1 = GETL32(buf + 32);
hdr->reserved.gimp_dds_special.magic2 = GETL32(buf + 36);
hdr->reserved.gimp_dds_special.version = GETL32(buf + 40);
hdr->reserved.gimp_dds_special.extra_fourcc = GETL32(buf + 44);
}
return 1;
}
static int
read_header_dx10 (dds_header_dx10_t *hdr,
FILE *fp)
{
char buf[DDS_HEADERSIZE_DX10];
memset (hdr, 0, sizeof (dds_header_dx10_t));
if (fread (buf, 1, DDS_HEADERSIZE_DX10, fp) != DDS_HEADERSIZE_DX10)
return 0;
hdr->dxgiFormat = GETL32(buf);
hdr->resourceDimension = GETL32(buf + 4);
hdr->miscFlag = GETL32(buf + 8);
hdr->arraySize = GETL32(buf + 12);
hdr->reserved = GETL32(buf + 16);
return 1;
}
static int
validate_header (dds_header_t *hdr)
{
unsigned int fourcc;
if (hdr->magic != FOURCC ('D','D','S',' '))
{
g_message ("Invalid DDS file.\n");
return 0;
}
if (hdr->pixelfmt.flags & DDPF_FOURCC)
{
if (hdr->flags & DDSD_PITCH)
{
g_message ("Warning: DDSD_PITCH is incorrectly set for DDPF_FOURCC!");
hdr->flags &= DDSD_PITCH;
}
if (! (hdr->flags & DDSD_LINEARSIZE))
{
g_message ("Warning: DDSD_LINEARSIZE is incorrectly not set for DDPF_FOURCC!");
hdr->flags |= DDSD_LINEARSIZE;
}
}
else
{
if (! (hdr->flags & DDSD_PITCH))
{
g_printerr ("Warning: DDSD_PITCH is incorrectly not set for an uncompressed texture! (recovered)\n");
hdr->flags |= DDSD_PITCH;
}
if ((hdr->flags & DDSD_LINEARSIZE))
{
g_printerr ("Warning: DDSD_LINEARSIZE is incorrectly set for an uncompressed texture! (recovered)\n");
hdr->flags &= DDSD_LINEARSIZE;
}
}
/*
if ((hdr->pixelfmt.flags & DDPF_FOURCC) ==
(hdr->pixelfmt.flags & DDPF_RGB))
{
g_message ("Invalid pixel format.\n");
return 0;
}
*/
fourcc = GETL32(hdr->pixelfmt.fourcc);
if ((hdr->pixelfmt.flags & DDPF_FOURCC) &&
fourcc != FOURCC ('D','X','T','1') &&
fourcc != FOURCC ('D','X','T','2') &&
fourcc != FOURCC ('D','X','T','3') &&
fourcc != FOURCC ('D','X','T','4') &&
fourcc != FOURCC ('D','X','T','5') &&
fourcc != FOURCC ('R','X','G','B') &&
fourcc != FOURCC ('A','T','I','1') &&
fourcc != FOURCC ('B','C','4','U') &&
fourcc != FOURCC ('B','C','4','S') &&
fourcc != FOURCC ('A','T','I','2') &&
fourcc != FOURCC ('B','C','5','U') &&
fourcc != FOURCC ('B','C','5','S') &&
fourcc != FOURCC ('D','X','1','0'))
{
g_message ("Unsupported format (FOURCC: %c%c%c%c, hex: %08x).\n",
hdr->pixelfmt.fourcc[0],
hdr->pixelfmt.fourcc[1],
hdr->pixelfmt.fourcc[2],
hdr->pixelfmt.fourcc[3],
GETL32(hdr->pixelfmt.fourcc));
return 0;
}
if (hdr->pixelfmt.flags & DDPF_RGB)
{
if ((hdr->pixelfmt.bpp != 8) &&
(hdr->pixelfmt.bpp != 16) &&
(hdr->pixelfmt.bpp != 24) &&
(hdr->pixelfmt.bpp != 32))
{
g_message ("Invalid BPP.\n");
return 0;
}
}
else if (hdr->pixelfmt.flags & DDPF_LUMINANCE)
{
if ((hdr->pixelfmt.bpp != 8) &&
(hdr->pixelfmt.bpp != 16))
{
g_message ("Invalid BPP.\n");
return 0;
}
hdr->pixelfmt.flags |= DDPF_RGB;
}
else if (hdr->pixelfmt.flags & DDPF_PALETTEINDEXED8)
{
hdr->pixelfmt.flags |= DDPF_RGB;
}
if (!(hdr->pixelfmt.flags & DDPF_RGB) &&
!(hdr->pixelfmt.flags & DDPF_ALPHA) &&
!(hdr->pixelfmt.flags & DDPF_FOURCC) &&
!(hdr->pixelfmt.flags & DDPF_LUMINANCE))
{
g_message ("Unknown pixel format! Taking a guess, expect trouble!");
switch (fourcc)
{
case FOURCC ('D','X','T','1'):
case FOURCC ('D','X','T','2'):
case FOURCC ('D','X','T','3'):
case FOURCC ('D','X','T','4'):
case FOURCC ('D','X','T','5'):
case FOURCC ('R','X','G','B'):
case FOURCC ('A','T','I','1'):
case FOURCC ('B','C','4','U'):
case FOURCC ('B','C','4','S'):
case FOURCC ('A','T','I','2'):
case FOURCC ('B','C','5','U'):
case FOURCC ('B','C','5','S'):
hdr->pixelfmt.flags |= DDPF_FOURCC;
break;
default:
switch (hdr->pixelfmt.bpp)
{
case 8:
if (hdr->pixelfmt.flags & DDPF_ALPHAPIXELS)
hdr->pixelfmt.flags |= DDPF_ALPHA;
else
hdr->pixelfmt.flags |= DDPF_LUMINANCE;
break;
case 16:
case 24:
case 32:
hdr->pixelfmt.flags |= DDPF_RGB;
break;
default:
g_message ("Invalid pixel format.");
return 0;
}
break;
}
}
return 1;
}
/*
* This function will set the necessary flags and attributes in the standard
* dds header using the information found in the DX10 header.
*/
static int
setup_dxgi_format (dds_header_t *hdr,
dds_header_dx10_t *dx10hdr)
{
if ((dx10hdr->resourceDimension == D3D10_RESOURCE_DIMENSION_TEXTURE2D) &&
(dx10hdr->miscFlag & D3D10_RESOURCE_MISC_TEXTURECUBE))
{
hdr->caps.caps2 |= DDSCAPS2_CUBEMAP | DDSCAPS2_CUBEMAP_ALL_FACES;
}
else if (dx10hdr->resourceDimension == D3D10_RESOURCE_DIMENSION_TEXTURE3D)
{
hdr->flags |= DDSD_DEPTH;
hdr->caps.caps2 |= DDSCAPS2_VOLUME;
}
if ((dx10hdr->resourceDimension != D3D10_RESOURCE_DIMENSION_TEXTURE1D) &&
(dx10hdr->resourceDimension != D3D10_RESOURCE_DIMENSION_TEXTURE2D) &&
(dx10hdr->resourceDimension != D3D10_RESOURCE_DIMENSION_TEXTURE3D))
return 0;
// check for a compressed DXGI format
if ((dx10hdr->dxgiFormat >= DXGI_FORMAT_BC1_TYPELESS) &&
(dx10hdr->dxgiFormat <= DXGI_FORMAT_BC5_SNORM))
{
// set flag and replace FOURCC
hdr->pixelfmt.flags |= DDPF_FOURCC;
switch (dx10hdr->dxgiFormat)
{
case DXGI_FORMAT_BC1_TYPELESS:
case DXGI_FORMAT_BC1_UNORM:
case DXGI_FORMAT_BC1_UNORM_SRGB:
PUTL32(hdr->pixelfmt.fourcc, FOURCC ('D','X','T','1'));
break;
case DXGI_FORMAT_BC2_TYPELESS:
case DXGI_FORMAT_BC2_UNORM:
case DXGI_FORMAT_BC2_UNORM_SRGB:
PUTL32(hdr->pixelfmt.fourcc, FOURCC ('D','X','T','3'));
break;
case DXGI_FORMAT_BC3_TYPELESS:
case DXGI_FORMAT_BC3_UNORM:
case DXGI_FORMAT_BC3_UNORM_SRGB:
PUTL32(hdr->pixelfmt.fourcc, FOURCC ('D','X','T','5'));
break;
case DXGI_FORMAT_BC4_TYPELESS:
case DXGI_FORMAT_BC4_UNORM:
PUTL32(hdr->pixelfmt.fourcc, FOURCC ('A','T','I','1'));
break;
case DXGI_FORMAT_BC4_SNORM:
PUTL32(hdr->pixelfmt.fourcc, FOURCC ('B','C','4','S'));
break;
case DXGI_FORMAT_BC5_TYPELESS:
case DXGI_FORMAT_BC5_UNORM:
PUTL32(hdr->pixelfmt.fourcc, FOURCC ('A','T','I','2'));
break;
case DXGI_FORMAT_BC5_SNORM:
PUTL32(hdr->pixelfmt.fourcc, FOURCC ('B','C','5','S'));
break;
default:
break;
}
}
else
{
/* unset the FOURCC flag */
hdr->pixelfmt.flags &= ~DDPF_FOURCC;
switch (dx10hdr->dxgiFormat)
{
case DXGI_FORMAT_B8G8R8A8_TYPELESS:
case DXGI_FORMAT_B8G8R8A8_UNORM:
case DXGI_FORMAT_B8G8R8A8_UNORM_SRGB:
hdr->pixelfmt.bpp = 32;
hdr->pixelfmt.flags |= DDPF_ALPHAPIXELS;
hdr->pixelfmt.rmask = 0x00ff0000;
hdr->pixelfmt.gmask = 0x0000ff00;
hdr->pixelfmt.bmask = 0x000000ff;
hdr->pixelfmt.amask = 0xff000000;
break;
case DXGI_FORMAT_B8G8R8X8_TYPELESS:
case DXGI_FORMAT_B8G8R8X8_UNORM:
case DXGI_FORMAT_B8G8R8X8_UNORM_SRGB:
hdr->pixelfmt.bpp = 32;
hdr->pixelfmt.flags |= DDPF_ALPHAPIXELS;
hdr->pixelfmt.rmask = 0x00ff0000;
hdr->pixelfmt.gmask = 0x0000ff00;
hdr->pixelfmt.bmask = 0x000000ff;
hdr->pixelfmt.amask = 0x00000000;
break;
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:
hdr->pixelfmt.bpp = 32;
hdr->pixelfmt.flags |= DDPF_ALPHAPIXELS;
hdr->pixelfmt.rmask = 0x000000ff;
hdr->pixelfmt.gmask = 0x0000ff00;
hdr->pixelfmt.bmask = 0x00ff0000;
hdr->pixelfmt.amask = 0xff000000;
break;
case DXGI_FORMAT_B5G6R5_UNORM:
hdr->pixelfmt.bpp = 16;
hdr->pixelfmt.rmask = 0x0000f800;
hdr->pixelfmt.gmask = 0x000007e0;
hdr->pixelfmt.bmask = 0x0000001f;
hdr->pixelfmt.amask = 0x00000000;
break;
case DXGI_FORMAT_B5G5R5A1_UNORM:
hdr->pixelfmt.bpp = 16;
hdr->pixelfmt.rmask = 0x00007c00;
hdr->pixelfmt.gmask = 0x000003e0;
hdr->pixelfmt.bmask = 0x0000001f;
hdr->pixelfmt.amask = 0x00008000;
break;
case DXGI_FORMAT_R10G10B10A2_TYPELESS:
case DXGI_FORMAT_R10G10B10A2_UNORM:
case DXGI_FORMAT_R10G10B10A2_UINT:
hdr->pixelfmt.bpp = 32;
hdr->pixelfmt.flags |= DDPF_ALPHAPIXELS;
hdr->pixelfmt.rmask = 0x000003ff;
hdr->pixelfmt.gmask = 0x000ffc00;
hdr->pixelfmt.bmask = 0x3ff00000;
hdr->pixelfmt.amask = 0xc0000000;
break;
case DXGI_FORMAT_A8_UNORM:
hdr->pixelfmt.bpp = 8;
hdr->pixelfmt.flags |= DDPF_ALPHA | DDPF_ALPHAPIXELS;
hdr->pixelfmt.rmask = hdr->pixelfmt.gmask = hdr->pixelfmt.bmask = 0;
hdr->pixelfmt.amask = 0x000000ff;
break;
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:
hdr->pixelfmt.bpp = 8;
hdr->pixelfmt.rmask = 0x000000ff;
hdr->pixelfmt.gmask = hdr->pixelfmt.bmask = hdr->pixelfmt.amask = 0;
break;
case DXGI_FORMAT_B4G4R4A4_UNORM:
hdr->pixelfmt.bpp = 16;
hdr->pixelfmt.flags |= DDPF_ALPHAPIXELS;
hdr->pixelfmt.rmask = 0x00000f00;
hdr->pixelfmt.gmask = 0x000000f0;
hdr->pixelfmt.bmask = 0x0000000f;
hdr->pixelfmt.amask = 0x0000f000;
break;
case DXGI_FORMAT_UNKNOWN:
g_message ("Unknown DXGI format. Expect problems...");
break;
default: /* unsupported DXGI format */
g_message ("Unsupported DXGI format (%d)", dx10hdr->dxgiFormat);
return 0;
}
}
return 1;
}
static const Babl*
premultiplied_variant (const Babl* format)
{
if (format == babl_format ("R'G'B'A u8"))
return babl_format ("R'aG'aB'aA u8");
else
g_printerr ("Add format %s to premultiplied_variant () %s: %d\n", babl_get_name (format), __FILE__, __LINE__);
return format;
}
static int
load_layer (FILE *fp,
dds_header_t *hdr,
dds_load_info_t *d,
gint32 image,
unsigned int level,
char *prefix,
unsigned int *l,
guchar *pixels,
unsigned char *buf)
{
GeglBuffer *buffer;
const Babl *bablfmt = NULL;
GimpImageType type = GIMP_RGBA_IMAGE;
gchar *layer_name;
gint x, y, z, n;
gint32 layer;
unsigned int width = hdr->width >> level;
unsigned int height = hdr->height >> level;
unsigned int size = hdr->pitch_or_linsize >> (2 * level);
unsigned int layerw;
int format = DDS_COMPRESS_NONE;
if (width < 1) width = 1;
if (height < 1) height = 1;
switch (d->bpp)
{
case 1:
if (hdr->pixelfmt.flags & DDPF_PALETTEINDEXED8)
{
type = GIMP_INDEXED_IMAGE;
}
else if (hdr->pixelfmt.rmask == 0xe0)
{
type = GIMP_RGB_IMAGE;
bablfmt = babl_format ("R'G'B' u8");
}
else if (hdr->pixelfmt.flags & DDPF_ALPHA)
{
type = GIMP_GRAYA_IMAGE;
bablfmt = babl_format ("Y'A u8");
}
else
{
type = GIMP_GRAY_IMAGE;
bablfmt = babl_format ("Y' u8");
}
break;
case 2:
if ((hdr->pixelfmt.flags & (DDPF_PALETTEINDEXED8 + DDPF_ALPHA)) ==
DDPF_PALETTEINDEXED8 + DDPF_ALPHA)
{
type = GIMP_INDEXEDA_IMAGE;
}
else if (hdr->pixelfmt.amask == 0xf000) /* RGBA4 */
{
type = GIMP_RGBA_IMAGE;
bablfmt = babl_format ("R'G'B'A u8");
}
else if (hdr->pixelfmt.amask == 0xff00) /* L8A8 */
{
type = GIMP_GRAYA_IMAGE;
bablfmt = babl_format ("Y'A u8");
}
else if (hdr->pixelfmt.bmask == 0x1f) /* R5G6B5 or RGB5A1 */
{
type = (hdr->pixelfmt.amask == 0x8000) ? GIMP_RGBA_IMAGE : GIMP_RGB_IMAGE;
bablfmt = (hdr->pixelfmt.amask == 0x8000) ? babl_format ("R'G'B'A u8") : babl_format ("R'G'B' u8");
}
else if (hdr->pixelfmt.rmask == 0xffff) /* L16 */
{
type = GIMP_GRAY_IMAGE;
bablfmt = babl_format ("Y' u16");
}
break;
case 3: type = GIMP_RGB_IMAGE; bablfmt = babl_format ("R'G'B' u8"); break;
case 4: type = GIMP_RGBA_IMAGE; bablfmt = babl_format ("R'G'B'A u8"); break;
}
layer_name = (level) ? g_strdup_printf ("mipmap %d %s", level, prefix) :
g_strdup_printf ("main surface %s", prefix);
layer = gimp_layer_new (image, layer_name, width, height, type, 100,
GIMP_LAYER_MODE_NORMAL);
g_free (layer_name);
gimp_image_insert_layer (image, layer, 0, *l);
if (type == GIMP_INDEXED_IMAGE || type == GIMP_INDEXEDA_IMAGE)
bablfmt = gimp_drawable_get_format (layer);
if ((*l)++) gimp_item_set_visible (layer, FALSE);
buffer = gimp_drawable_get_buffer (layer);
layerw = gegl_buffer_get_width (buffer);
if (hdr->pixelfmt.flags & DDPF_FOURCC)
{
unsigned int w = (width + 3) >> 2;
unsigned int h = (height + 3) >> 2;
switch (GETL32(hdr->pixelfmt.fourcc))
{
case FOURCC ('D','X','T','1'): format = DDS_COMPRESS_BC1; break;
case FOURCC ('D','X','T','2'): bablfmt = premultiplied_variant (bablfmt);
case FOURCC ('D','X','T','3'): format = DDS_COMPRESS_BC2; break;
case FOURCC ('D','X','T','4'): bablfmt = premultiplied_variant (bablfmt);
case FOURCC ('D','X','T','5'): format = DDS_COMPRESS_BC3; break;
case FOURCC ('R','X','G','B'): format = DDS_COMPRESS_BC3; break;
case FOURCC ('A','T','I','1'):
case FOURCC ('B','C','4','U'):
case FOURCC ('B','C','4','S'): format = DDS_COMPRESS_BC4; break;
case FOURCC ('A','T','I','2'):
case FOURCC ('B','C','5','U'):
case FOURCC ('B','C','5','S'): format = DDS_COMPRESS_BC5; break;
}
size = w * h;
if ((format == DDS_COMPRESS_BC1) || (format == DDS_COMPRESS_BC4))
size *= 8;
else
size *= 16;
}
if ((hdr->flags & DDSD_LINEARSIZE) &&
!fread (buf, size, 1, fp))
{
g_message ("Unexpected EOF.\n");
return 0;
}
if ((hdr->pixelfmt.flags & DDPF_RGB) ||
(hdr->pixelfmt.flags & DDPF_ALPHA))
{
guint ired = 0;
guint iblue = 2;
if (hdr->reserved.gimp_dds_special.magic1 == FOURCC ('G','I','M','P') &&
hdr->reserved.gimp_dds_special.version <= 199003 &&
hdr->reserved.gimp_dds_special.version > 0 &&
d->bpp >= 3 && hdr->pixelfmt.amask == 0xc0000000)
{
/* GIMP dds plug-in versions before or equal to 199003 (3.9.91) wrote
* the red and green channels reversed for RGB10A2. We will fix that here.
*/
g_printerr ("Switching incorrect red and green channels in RGB10A2 dds "
"written by an older version of GIMP's dds plug-in.\n");
ired = 2;
iblue = 0;
}
z = 0;
for (y = 0, n = 0; y < height; ++y, ++n)
{
if (n >= d->tile_height)
{
gegl_buffer_set (buffer, GEGL_RECTANGLE (0, y - n, layerw, n), 0,
bablfmt, pixels, GEGL_AUTO_ROWSTRIDE);
n = 0;
gimp_progress_update ((double)y / (double)hdr->height);
}
if ((hdr->flags & DDSD_PITCH) &&
!fread (buf, width * d->bpp, 1, fp))
{
g_message ("Unexpected EOF.\n");
return 0;
}
if (!(hdr->flags & DDSD_LINEARSIZE)) z = 0;
for (x = 0; x < layerw; ++x)
{
unsigned int pixel = buf[z];
unsigned int pos = (n * layerw + x) * d->gimp_bpp;
if (d->bpp > 1) pixel += ((unsigned int)buf[z + 1] << 8);
if (d->bpp > 2) pixel += ((unsigned int)buf[z + 2] << 16);
if (d->bpp > 3) pixel += ((unsigned int)buf[z + 3] << 24);
if (d->bpp >= 3)
{
if (hdr->pixelfmt.amask == 0xc0000000) // handle RGB10A2
{
pixels[pos + ired] = (pixel >> d->rshift) >> 2;
pixels[pos + 1] = (pixel >> d->gshift) >> 2;
pixels[pos + iblue] = (pixel >> d->bshift) >> 2;
if (hdr->pixelfmt.flags & DDPF_ALPHAPIXELS)
pixels[pos + 3] = (pixel >> d->ashift << (8 - d->abits) & d->amask) * 255 / d->amask;
}
else
{
pixels[pos] =
(pixel >> d->rshift << (8 - d->rbits) & d->rmask) * 255 / d->rmask;
pixels[pos + 1] =
(pixel >> d->gshift << (8 - d->gbits) & d->gmask) * 255 / d->gmask;
pixels[pos + 2] =
(pixel >> d->bshift << (8 - d->bbits) & d->bmask) * 255 / d->bmask;
if (hdr->pixelfmt.flags & DDPF_ALPHAPIXELS)
{
pixels[pos + 3] =
(pixel >> d->ashift << (8 - d->abits) & d->amask) * 255 / d->amask;
}
}
}
else if (d->bpp == 2)
{
if (hdr->pixelfmt.amask == 0xf000) //RGBA4
{
pixels[pos] =
(pixel >> d->rshift << (8 - d->rbits) & d->rmask) * 255 / d->rmask;
pixels[pos + 1] =
(pixel >> d->gshift << (8 - d->gbits) & d->gmask) * 255 / d->gmask;
pixels[pos + 2] =
(pixel >> d->bshift << (8 - d->bbits) & d->bmask) * 255 / d->bmask;
pixels[pos + 3] =
(pixel >> d->ashift << (8 - d->abits) & d->amask) * 255 / d->amask;
}
else if (hdr->pixelfmt.amask == 0xff00) //L8A8
{
pixels[pos] =
(pixel >> d->rshift << (8 - d->rbits) & d->rmask) * 255 / d->rmask;
pixels[pos + 1] =
(pixel >> d->ashift << (8 - d->abits) & d->amask) * 255 / d->amask;
}
else if (hdr->pixelfmt.bmask == 0x1f) //R5G6B5 or RGB5A1
{
pixels[pos] =
(pixel >> d->rshift << (8 - d->rbits) & d->rmask) * 255 / d->rmask;
pixels[pos + 1] =
(pixel >> d->gshift << (8 - d->gbits) & d->gmask) * 255 / d->gmask;
pixels[pos + 2] =
(pixel >> d->bshift << (8 - d->bbits) & d->bmask) * 255 / d->bmask;
if (hdr->pixelfmt.amask == 0x8000)
{
pixels[pos + 3] =
(pixel >> d->ashift << (8 - d->abits) & d->amask) * 255 / d->amask;
}
}
else if (hdr->pixelfmt.rmask == 0xffff) /* L16 */
{
guint16 *pixels16 = (guint16 *) &pixels[pos];
*pixels16 = (guint16) (pixel & 0xffff);
}
}
else
{
if (hdr->pixelfmt.flags & DDPF_PALETTEINDEXED8)
{
pixels[pos] = pixel & 0xff;
}
else if (hdr->pixelfmt.rmask == 0xe0) // R3G3B2
{
pixels[pos] =
(pixel >> d->rshift << (8 - d->rbits) & d->rmask) * 255 / d->rmask;
pixels[pos + 1] =
(pixel >> d->gshift << (8 - d->gbits) & d->gmask) * 255 / d->gmask;
pixels[pos + 2] =
(pixel >> d->bshift << (8 - d->bbits) & d->bmask) * 255 / d->bmask;
}
else if (hdr->pixelfmt.flags & DDPF_ALPHA)
{
pixels[pos + 0] = 255;
pixels[pos + 1] = pixel & 0xff;
}
else // LUMINANCE
{
pixels[pos] = pixel & 0xff;
}
}
z += d->bpp;
}
}
gegl_buffer_set (buffer, GEGL_RECTANGLE (0, y - n, layerw, n), 0,
bablfmt, pixels, GEGL_AUTO_ROWSTRIDE);
}
else if (hdr->pixelfmt.flags & DDPF_FOURCC)
{
unsigned char *dst;
dst = g_malloc (width * height * d->gimp_bpp);
memset (dst, 0, width * height * d->gimp_bpp);
if (d->gimp_bpp == 4)
{
for (y = 0; y < height; ++y)
for (x = 0; x < width; ++x)
dst[y * (width * 4) + (x * 4) + 3] = 255;
}
dxt_decompress (dst, buf, format, size, width, height, d->gimp_bpp,
hdr->pixelfmt.flags & DDPF_NORMAL);
if (format == DDS_COMPRESS_BC5 &&
hdr->reserved.gimp_dds_special.magic1 == FOURCC ('G','I','M','P') &&
hdr->reserved.gimp_dds_special.version > 0 &&
hdr->reserved.gimp_dds_special.version <= 199002)
{
/* GIMP dds plug-in versions before 199002 == 3.9.90 wrote
* the red and green channels reversed. We will fix that here.
*/
g_printerr ("Switching incorrect red and green channels in BC5 dds "
"written by an older version of GIMP's dds plug-in.\n");
for (y = 0; y < height; ++y)
for (x = 0; x < width; ++x)
{
guchar tmpG;
guint pix_width = width * d->gimp_bpp;
guint x_width = x * d->gimp_bpp;
tmpG = dst[y * pix_width + x_width];
dst[y * pix_width + x_width] = dst[y * pix_width + x_width + 1];
dst[y * pix_width + x_width + 1] = tmpG;
}
}
z = 0;
for (y = 0, n = 0; y < height; ++y, ++n)
{
if (n >= d->tile_height)
{
gegl_buffer_set (buffer, GEGL_RECTANGLE (0, y - n, layerw, n), 0,
bablfmt, pixels, GEGL_AUTO_ROWSTRIDE);
n = 0;
gimp_progress_update ((double)y / (double)hdr->height);
}
memcpy (pixels + n * layerw * d->gimp_bpp,
dst + y * layerw * d->gimp_bpp,
width * d->gimp_bpp);
}
gegl_buffer_set (buffer, GEGL_RECTANGLE (0, y - n, layerw, n), 0,
bablfmt, pixels, GEGL_AUTO_ROWSTRIDE);
g_free (dst);
}
gegl_buffer_flush (buffer);
g_object_unref (buffer);
/* gimp dds specific. decode encoded images */
if (dds_read_vals.decode_images &&
hdr->reserved.gimp_dds_special.magic1 == FOURCC ('G','I','M','P') &&
hdr->reserved.gimp_dds_special.magic2 == FOURCC ('-','D','D','S'))
{
switch (hdr->reserved.gimp_dds_special.extra_fourcc)
{
case FOURCC ('A','E','X','P'):
decode_alpha_exp_image (layer, FALSE);
break;
case FOURCC ('Y','C','G','1'):
decode_ycocg_image (layer, FALSE);
break;
case FOURCC ('Y','C','G','2'):
decode_ycocg_scaled_image (layer, FALSE);
break;
default:
break;
}
}
return 1;
}
static int
load_mipmaps (FILE *fp,
dds_header_t *hdr,
dds_load_info_t *d,
gint32 image,
char *prefix,
unsigned int *l,
guchar *pixels,
unsigned char *buf)
{
unsigned int level;
if ((hdr->flags & DDSD_MIPMAPCOUNT) &&
(hdr->caps.caps1 & DDSCAPS_MIPMAP) &&
(dds_read_vals.mipmaps != 0))
{
for (level = 1; level < hdr->num_mipmaps; ++level)
{
if (!load_layer (fp, hdr, d, image, level, prefix, l, pixels, buf))
return 0;
}
}
return 1;
}
static int
load_face (FILE *fp,
dds_header_t *hdr,
dds_load_info_t *d,
gint32 image,
char *prefix,
unsigned int *l,
guchar *pixels,
unsigned char *buf)
{
if (!load_layer (fp, hdr, d, image, 0, prefix, l, pixels, buf))
return 0;
return load_mipmaps (fp, hdr, d, image, prefix, l, pixels, buf);
}
static unsigned char
color_bits (unsigned int mask)
{
unsigned char i = 0;
while (mask)
{
if (mask & 1) ++i;
mask >>= 1;
}
return i;
}
static unsigned char
color_shift (unsigned int mask)
{
guchar i = 0;
if (! mask)
return 0;
while (!((mask >> i) & 1))
++i;
return i;
}
static void
load_dialog_response (GtkWidget *widget,
gint response_id,
gpointer data)
{
switch (response_id)
{
case GTK_RESPONSE_OK:
runme = TRUE;
default:
gtk_widget_destroy (widget);
break;
}
}
static void
toggle_clicked (GtkWidget *widget,
gpointer data)
{
int *flag = (int*) data;
(*flag) = !(*flag);
}
static int
load_dialog (void)
{
GtkWidget *dlg;
GtkWidget *vbox;
GtkWidget *check;
dlg = gimp_dialog_new (_("Load DDS"), "dds", NULL, GTK_WIN_POS_MOUSE,
gimp_standard_help_func, LOAD_PROC,
_("_Cancel"), GTK_RESPONSE_CANCEL,
_("_OK"), GTK_RESPONSE_OK,
NULL);
g_signal_connect (dlg, "response",
G_CALLBACK (load_dialog_response),
0);
g_signal_connect (dlg, "destroy",
G_CALLBACK (gtk_main_quit),
0);
vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 8);
gtk_container_set_border_width (GTK_CONTAINER (vbox), 8);
gtk_box_pack_start (GTK_BOX (gtk_dialog_get_content_area (GTK_DIALOG (dlg))),
vbox, 1, 1, 0);
gtk_widget_show (vbox);
check = gtk_check_button_new_with_mnemonic (_("_Load mipmaps"));
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (check), dds_read_vals.mipmaps);
g_signal_connect (check, "clicked",
G_CALLBACK (toggle_clicked), &dds_read_vals.mipmaps);
gtk_box_pack_start (GTK_BOX (vbox), check, 1, 1, 0);
gtk_widget_show (check);
check = gtk_check_button_new_with_mnemonic (_("_Automatically decode YCoCg/AExp images when detected"));
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (check), dds_read_vals.decode_images);
g_signal_connect (check, "clicked",
G_CALLBACK (toggle_clicked), &dds_read_vals.decode_images);
gtk_box_pack_start (GTK_BOX (vbox), check, 1, 1, 0);
gtk_widget_show (check);
gtk_widget_show (dlg);
runme = FALSE;
gtk_main ();
return runme;
}