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|
//-----------------------------------------------------------------------------
// Name: nv_image_dds.h
// Developer: Wolfire Games LLC
// Description: This is a file from an Nvidia image library, with some
// modification made by Wolfire.
// License: Read below
//-----------------------------------------------------------------------------
//
// nvImageDDS.cpp - Image support class
//
// The nvImage class implements an interface for a multipurpose image
// object. This class is useful for loading and formating images
// for use as textures. The class supports dds, png, and hdr formats.
//
// This file implements the DDS specific functionality.
//
// Author: Evan Hart
// Email: sdkfeedback@nvidia.com
//
// Copyright (c) NVIDIA Corporation. All rights reserved.
////////////////////////////////////////////////////////////////////////////////
#include <Images/nv_image.h>
#include <Compat/fileio.h>
#include <Internal/integer.h>
#include <cstdio>
#include <cstring>
using std::vector;
namespace nv2 {
//
// Structure defines and constants from nvdds
//
//////////////////////////////////////////////////////////////////////
// surface description flags
const uint32_t DDSF_CAPS = 0x00000001l;
const uint32_t DDSF_HEIGHT = 0x00000002l;
const uint32_t DDSF_WIDTH = 0x00000004l;
const uint32_t DDSF_PITCH = 0x00000008l;
const uint32_t DDSF_PIXELFORMAT = 0x00001000l;
const uint32_t DDSF_MIPMAPCOUNT = 0x00020000l;
const uint32_t DDSF_LINEARSIZE = 0x00080000l;
const uint32_t DDSF_DEPTH = 0x00800000l;
// pixel format flags
const uint32_t DDSF_ALPHAPIXELS = 0x00000001l;
const uint32_t DDSF_FOURCC = 0x00000004l;
const uint32_t DDSF_RGB = 0x00000040l;
const uint32_t DDSF_RGBA = 0x00000041l;
// dwCaps1 flags
const uint32_t DDSF_COMPLEX = 0x00000008l;
const uint32_t DDSF_TEXTURE = 0x00001000l;
const uint32_t DDSF_MIPMAP = 0x00400000l;
// dwCaps2 flags
const uint32_t DDSF_CUBEMAP = 0x00000200l;
const uint32_t DDSF_CUBEMAP_POSITIVEX = 0x00000400l;
const uint32_t DDSF_CUBEMAP_NEGATIVEX = 0x00000800l;
const uint32_t DDSF_CUBEMAP_POSITIVEY = 0x00001000l;
const uint32_t DDSF_CUBEMAP_NEGATIVEY = 0x00002000l;
const uint32_t DDSF_CUBEMAP_POSITIVEZ = 0x00004000l;
const uint32_t DDSF_CUBEMAP_NEGATIVEZ = 0x00008000l;
const uint32_t DDSF_CUBEMAP_ALL_FACES = 0x0000FC00l;
const uint32_t DDSF_VOLUME = 0x00200000l;
// compressed texture types
const uint32_t FOURCC_UNKNOWN = 0;
#ifndef MAKEFOURCC
#define MAKEFOURCC(c0,c1,c2,c3) \
((uint32_t)(unsigned char)(c0)| \
((uint32_t)(unsigned char)(c1) << 8)| \
((uint32_t)(unsigned char)(c2) << 16)| \
((uint32_t)(unsigned char)(c3) << 24))
#endif
const uint32_t FOURCC_R8G8B8 = 20;
const uint32_t FOURCC_A8R8G8B8 = 21;
const uint32_t FOURCC_X8R8G8B8 = 22;
const uint32_t FOURCC_R5G6B5 = 23;
const uint32_t FOURCC_X1R5G5B5 = 24;
const uint32_t FOURCC_A1R5G5B5 = 25;
const uint32_t FOURCC_A4R4G4B4 = 26;
const uint32_t FOURCC_R3G3B2 = 27;
const uint32_t FOURCC_A8 = 28;
const uint32_t FOURCC_A8R3G3B2 = 29;
const uint32_t FOURCC_X4R4G4B4 = 30;
const uint32_t FOURCC_A2B10G10R10 = 31;
const uint32_t FOURCC_A8B8G8R8 = 32;
const uint32_t FOURCC_X8B8G8R8 = 33;
const uint32_t FOURCC_G16R16 = 34;
const uint32_t FOURCC_A2R10G10B10 = 35;
const uint32_t FOURCC_A16B16G16R16 = 36;
const uint32_t FOURCC_L8 = 50;
const uint32_t FOURCC_A8L8 = 51;
const uint32_t FOURCC_A4L4 = 52;
const uint32_t FOURCC_DXT1 = 0x31545844l; //(MAKEFOURCC('D','X','T','1'))
const uint32_t FOURCC_DXT2 = 0x32545844l; //(MAKEFOURCC('D','X','T','1'))
const uint32_t FOURCC_DXT3 = 0x33545844l; //(MAKEFOURCC('D','X','T','3'))
const uint32_t FOURCC_DXT4 = 0x34545844l; //(MAKEFOURCC('D','X','T','3'))
const uint32_t FOURCC_DXT5 = 0x35545844l; //(MAKEFOURCC('D','X','T','5'))
const uint32_t FOURCC_ATI1 = MAKEFOURCC('A','T','I','1');
const uint32_t FOURCC_ATI2 = MAKEFOURCC('A','T','I','2');
const uint32_t FOURCC_D16_LOCKABLE = 70;
const uint32_t FOURCC_D32 = 71;
const uint32_t FOURCC_D24X8 = 77;
const uint32_t FOURCC_D16 = 80;
const uint32_t FOURCC_D32F_LOCKABLE = 82;
const uint32_t FOURCC_L16 = 81;
// Floating point surface formats
// s10e5 formats (16-bits per channel)
const uint32_t FOURCC_R16F = 111;
const uint32_t FOURCC_G16R16F = 112;
const uint32_t FOURCC_A16B16G16R16F = 113;
// IEEE s23e8 formats (32-bits per channel)
const uint32_t FOURCC_R32F = 114;
const uint32_t FOURCC_G32R32F = 115;
const uint32_t FOURCC_A32B32G32R32F = 116;
struct DXTColBlock
{
GLushort col0;
GLushort col1;
GLubyte row[4];
};
struct DXT3AlphaBlock
{
GLushort row[4];
};
struct DXT5AlphaBlock
{
GLubyte alpha0;
GLubyte alpha1;
GLubyte row[6];
};
struct DDS_PIXELFORMAT
{
uint32_t dwSize;
uint32_t dwFlags;
uint32_t dwFourCC;
uint32_t dwRGBBitCount;
uint32_t dwRBitMask;
uint32_t dwGBitMask;
uint32_t dwBBitMask;
uint32_t dwABitMask;
};
struct DDS_HEADER
{
uint32_t dwSize;
uint32_t dwFlags;
uint32_t dwHeight;
uint32_t dwWidth;
uint32_t dwPitchOrLinearSize;
uint32_t dwDepth;
uint32_t dwMipMapCount;
uint32_t dwReserved1[11];
DDS_PIXELFORMAT ddspf;
uint32_t dwCaps1;
uint32_t dwCaps2;
uint32_t dwReserved2[3];
};
//
//
////////////////////////////////////////////////////////////
bool Image::readDDS( const char *file, Image& i) {
// open file
FILE *fp = my_fopen(file, "rb");
if (fp == NULL)
return false;
// read in file marker, make sure its a DDS file
char filecode[4];
fread(filecode, 1, 4, fp);
if (strncmp(filecode, "DDS ", 4) != 0)
{
fclose(fp);
return false;
}
// read in DDS header
DDS_HEADER ddsh;
fread(&ddsh, sizeof(DDS_HEADER), 1, fp);
// check if image is a volume texture
if ((ddsh.dwCaps2 & DDSF_VOLUME) && (ddsh.dwDepth > 0))
i._depth = ddsh.dwDepth;
else
i._depth = 0;
// There are flags that are supposed to mark these fields as valid, but some dds files don't set them properly
i._width = ddsh.dwWidth;
i._height = ddsh.dwHeight;
if (ddsh.dwFlags & DDSF_MIPMAPCOUNT) {
i._levelCount = ddsh.dwMipMapCount;
}
else
i._levelCount = 1;
//check cube-map faces
if ( ddsh.dwCaps2 & DDSF_CUBEMAP) {
//this is a cubemap, count the faces
i._faces = 0;
i._faces += (ddsh.dwCaps2 & DDSF_CUBEMAP_POSITIVEX) ? 1 : 0;
i._faces += (ddsh.dwCaps2 & DDSF_CUBEMAP_NEGATIVEX) ? 1 : 0;
i._faces += (ddsh.dwCaps2 & DDSF_CUBEMAP_POSITIVEY) ? 1 : 0;
i._faces += (ddsh.dwCaps2 & DDSF_CUBEMAP_NEGATIVEY) ? 1 : 0;
i._faces += (ddsh.dwCaps2 & DDSF_CUBEMAP_POSITIVEZ) ? 1 : 0;
i._faces += (ddsh.dwCaps2 & DDSF_CUBEMAP_NEGATIVEZ) ? 1 : 0;
//check for a complete cubemap
if ( (i._faces != 6) || (i._width != i._height) ) {
fclose(fp);
return false;
}
}
else {
//not a cubemap
i._faces = 0;
}
bool btcCompressed = false;
int bytesPerElement = 0;
// figure out what the image format is
if (ddsh.ddspf.dwFlags & DDSF_FOURCC)
{
switch(ddsh.ddspf.dwFourCC)
{
case FOURCC_DXT1:
i._format = GL_COMPRESSED_RGBA_S3TC_DXT1_EXT;
i._internalFormat = GL_COMPRESSED_RGBA_S3TC_DXT1_EXT;
i._type = GL_COMPRESSED_RGBA_S3TC_DXT1_EXT;
bytesPerElement = 8;
btcCompressed = true;
break;
case FOURCC_DXT2:
case FOURCC_DXT3:
i._format = GL_COMPRESSED_RGBA_S3TC_DXT3_EXT;
i._internalFormat = GL_COMPRESSED_RGBA_S3TC_DXT3_EXT;
i._type = GL_COMPRESSED_RGBA_S3TC_DXT3_EXT;
bytesPerElement = 16;
btcCompressed = true;
break;
case FOURCC_DXT4:
case FOURCC_DXT5:
i._format = GL_COMPRESSED_RGBA_S3TC_DXT5_EXT;
i._internalFormat = GL_COMPRESSED_RGBA_S3TC_DXT5_EXT;
i._type = GL_COMPRESSED_RGBA_S3TC_DXT5_EXT;
bytesPerElement = 16;
btcCompressed = true;
break;
case FOURCC_ATI1:
i._format = GL_COMPRESSED_LUMINANCE_LATC1_EXT;
i._internalFormat = GL_COMPRESSED_LUMINANCE_LATC1_EXT;
i._type = GL_COMPRESSED_LUMINANCE_LATC1_EXT;
bytesPerElement = 8;
btcCompressed = true;
break;
case FOURCC_ATI2:
i._format = GL_COMPRESSED_LUMINANCE_ALPHA_LATC2_EXT;
i._internalFormat = GL_COMPRESSED_LUMINANCE_ALPHA_LATC2_EXT;
i._type = GL_COMPRESSED_LUMINANCE_ALPHA_LATC2_EXT;
bytesPerElement = 16;
btcCompressed = true;
break;
case FOURCC_R8G8B8:
i._format = GL_BGR;
i._internalFormat = GL_RGB8;
i._type = GL_UNSIGNED_BYTE;
bytesPerElement = 3;
break;
case FOURCC_A8R8G8B8:
i._format = GL_BGRA;
i._internalFormat = GL_RGBA8;
i._type = GL_UNSIGNED_BYTE;
bytesPerElement = 4;
break;
case FOURCC_X8R8G8B8:
i._format = GL_BGRA;
i._internalFormat = GL_RGB8;
i._type = GL_UNSIGNED_INT_8_8_8_8;
bytesPerElement = 4;
break;
case FOURCC_R5G6B5:
i._format = GL_BGR;
i._internalFormat = GL_RGB5;
i._type = GL_UNSIGNED_SHORT_5_6_5;
bytesPerElement = 2;
break;
case FOURCC_A8:
i._format = GL_ALPHA;
i._internalFormat = GL_ALPHA8;
i._type = GL_UNSIGNED_BYTE;
bytesPerElement = 1;
break;
case FOURCC_A2B10G10R10:
i._format = GL_RGBA;
i._internalFormat = GL_RGB10_A2;
i._type = GL_UNSIGNED_INT_10_10_10_2;
bytesPerElement = 4;
break;
case FOURCC_A8B8G8R8:
i._format = GL_RGBA;
i._internalFormat = GL_RGBA8;
i._type = GL_UNSIGNED_BYTE;
bytesPerElement = 4;
break;
case FOURCC_X8B8G8R8:
i._format = GL_RGBA;
i._internalFormat = GL_RGB8;
i._type = GL_UNSIGNED_INT_8_8_8_8;
bytesPerElement = 4;
break;
case FOURCC_A2R10G10B10:
i._format = GL_BGRA;
i._internalFormat = GL_RGB10_A2;
i._type = GL_UNSIGNED_INT_10_10_10_2;
bytesPerElement = 4;
break;
case FOURCC_A16B16G16R16:
i._format = GL_RGBA;
i._internalFormat = GL_RGBA16;
i._type = GL_UNSIGNED_SHORT;
bytesPerElement = 8;
break;
case FOURCC_L8:
i._format = GL_LUMINANCE;
i._internalFormat = GL_LUMINANCE8;
i._type = GL_UNSIGNED_BYTE;
bytesPerElement = 1;
break;
case FOURCC_A8L8:
i._format = GL_LUMINANCE_ALPHA;
i._internalFormat = GL_LUMINANCE8_ALPHA8;
i._type = GL_UNSIGNED_BYTE;
bytesPerElement = 2;
break;
case FOURCC_L16:
i._format = GL_LUMINANCE;
i._internalFormat = GL_LUMINANCE16;
i._type = GL_UNSIGNED_SHORT;
bytesPerElement = 2;
break;
case FOURCC_R16F:
i._format = GL_LUMINANCE; //should use red, once it is available
i._internalFormat = GL_LUMINANCE16F_ARB;
i._type = GL_HALF_FLOAT;
bytesPerElement = 2;
break;
case FOURCC_A16B16G16R16F:
i._format = GL_RGBA;
i._internalFormat = GL_RGBA16F_ARB;
i._type = GL_HALF_FLOAT;
bytesPerElement = 8;
break;
case FOURCC_R32F:
i._format = GL_LUMINANCE; //should use red, once it is available
i._internalFormat = GL_LUMINANCE32F_ARB;
i._type = GL_FLOAT;
bytesPerElement = 4;
break;
case FOURCC_A32B32G32R32F:
i._format = GL_RGBA;
i._internalFormat = GL_RGBA32F;
i._type = GL_FLOAT;
bytesPerElement = 16;
break;
case FOURCC_UNKNOWN:
case FOURCC_X1R5G5B5:
case FOURCC_A1R5G5B5:
case FOURCC_A4R4G4B4:
case FOURCC_R3G3B2:
case FOURCC_A8R3G3B2:
case FOURCC_X4R4G4B4:
case FOURCC_A4L4:
case FOURCC_D16_LOCKABLE:
case FOURCC_D32:
case FOURCC_D24X8:
case FOURCC_D16:
case FOURCC_D32F_LOCKABLE:
case FOURCC_G16R16:
case FOURCC_G16R16F:
case FOURCC_G32R32F:
//these are unsupported for now
default:
fclose(fp);
return false;
}
}
else if (ddsh.ddspf.dwFlags == DDSF_RGBA && ddsh.ddspf.dwRGBBitCount == 32)
{
i._format = GL_BGRA;
i._internalFormat = GL_RGBA8;
i._type = GL_UNSIGNED_BYTE;
bytesPerElement = 4;
}
else if (ddsh.ddspf.dwFlags == DDSF_RGB && ddsh.ddspf.dwRGBBitCount == 32)
{
i._format = GL_BGR;
i._internalFormat = GL_RGBA8;
i._type = GL_UNSIGNED_BYTE;
bytesPerElement = 4;
}
else if (ddsh.ddspf.dwFlags == DDSF_RGB && ddsh.ddspf.dwRGBBitCount == 24)
{
i._format = GL_BGR;
i._internalFormat = GL_RGB8;
i._type = GL_UNSIGNED_BYTE;
bytesPerElement = 3;
}
else if (ddsh.ddspf.dwRGBBitCount == 8)
{
i._format = GL_LUMINANCE;
i._internalFormat = GL_LUMINANCE8;
i._type = GL_UNSIGNED_BYTE;
bytesPerElement = 1;
}
else
{
fclose(fp);
return false;
}
i._elementSize = bytesPerElement;
for (int face = 0; face < ((i._faces) ? i._faces : 1); face++) {
int w = i._width, h = i._height, d = (i._depth) ? i._depth : 1;
for (int level = 0; level < i._levelCount; level++) {
int bw = (btcCompressed) ? (w+3)/4 : w;
int bh = (btcCompressed) ? (h+3)/4 : h;
int size = bw*bh*d*bytesPerElement;
GLubyte *data = new GLubyte[size];
fread( data, size, 1, fp);
i._data.push_back(data);
if (i._faces != 6)
i.flipSurface( data, w, h, d);
//reduce mip sizes
w = ( w > 1) ? w >> 1 : 1;
h = ( h > 1) ? h >> 1 : 1;
d = ( d > 1) ? d >> 1 : 1;
}
}
/*
//reverse cube map y faces
if (i._faces == 6) {
for (int level = 0; level < i._levelCount; level++) {
GLubyte *temp = i._data[2*i._levelCount + level];
i._data[2*i._levelCount + level] = i._data[3*i._levelCount + level];
i._data[3*i._levelCount + level] = temp;
}
}
*/
fclose(fp);
return true;
}
//
// flip a DXT1 color block
////////////////////////////////////////////////////////////
void Image::flip_blocks_dxtc1(GLubyte *ptr, unsigned int numBlocks)
{
DXTColBlock *curblock = (DXTColBlock*)ptr;
GLubyte temp;
for (unsigned int i = 0; i < numBlocks; i++) {
temp = curblock->row[0];
curblock->row[0] = curblock->row[3];
curblock->row[3] = temp;
temp = curblock->row[1];
curblock->row[1] = curblock->row[2];
curblock->row[2] = temp;
curblock++;
}
}
//
// flip a DXT3 color block
////////////////////////////////////////////////////////////
void Image::flip_blocks_dxtc3(GLubyte *ptr, unsigned int numBlocks)
{
DXTColBlock *curblock = (DXTColBlock*)ptr;
DXT3AlphaBlock *alphablock;
GLushort tempS;
GLubyte tempB;
for (unsigned int i = 0; i < numBlocks; i++)
{
alphablock = (DXT3AlphaBlock*)curblock;
tempS = alphablock->row[0];
alphablock->row[0] = alphablock->row[3];
alphablock->row[3] = tempS;
tempS = alphablock->row[1];
alphablock->row[1] = alphablock->row[2];
alphablock->row[2] = tempS;
curblock++;
tempB = curblock->row[0];
curblock->row[0] = curblock->row[3];
curblock->row[3] = tempB;
tempB = curblock->row[1];
curblock->row[1] = curblock->row[2];
curblock->row[2] = tempB;
curblock++;
}
}
//
// flip a DXT5 alpha block
////////////////////////////////////////////////////////////
void flip_dxt5_alpha(DXT5AlphaBlock *block)
{
GLubyte gBits[4][4];
const uint32_t mask = 0x00000007; // bits = 00 00 01 11
uint32_t bits = 0;
memcpy(&bits, &block->row[0], sizeof(unsigned char) * 3);
gBits[0][0] = (GLubyte)(bits & mask);
bits >>= 3;
gBits[0][1] = (GLubyte)(bits & mask);
bits >>= 3;
gBits[0][2] = (GLubyte)(bits & mask);
bits >>= 3;
gBits[0][3] = (GLubyte)(bits & mask);
bits >>= 3;
gBits[1][0] = (GLubyte)(bits & mask);
bits >>= 3;
gBits[1][1] = (GLubyte)(bits & mask);
bits >>= 3;
gBits[1][2] = (GLubyte)(bits & mask);
bits >>= 3;
gBits[1][3] = (GLubyte)(bits & mask);
bits = 0;
memcpy(&bits, &block->row[3], sizeof(GLubyte) * 3);
gBits[2][0] = (GLubyte)(bits & mask);
bits >>= 3;
gBits[2][1] = (GLubyte)(bits & mask);
bits >>= 3;
gBits[2][2] = (GLubyte)(bits & mask);
bits >>= 3;
gBits[2][3] = (GLubyte)(bits & mask);
bits >>= 3;
gBits[3][0] = (GLubyte)(bits & mask);
bits >>= 3;
gBits[3][1] = (GLubyte)(bits & mask);
bits >>= 3;
gBits[3][2] = (GLubyte)(bits & mask);
bits >>= 3;
gBits[3][3] = (GLubyte)(bits & mask);
// clear existing alpha bits
memset(block->row, 0, sizeof(GLubyte) * 6);
uint32_t *pBits = ((uint32_t*) &(block->row[0]));
*pBits = *pBits | (gBits[3][0] << 0);
*pBits = *pBits | (gBits[3][1] << 3);
*pBits = *pBits | (gBits[3][2] << 6);
*pBits = *pBits | (gBits[3][3] << 9);
*pBits = *pBits | (gBits[2][0] << 12);
*pBits = *pBits | (gBits[2][1] << 15);
*pBits = *pBits | (gBits[2][2] << 18);
*pBits = *pBits | (gBits[2][3] << 21);
pBits = ((uint32_t*) &(block->row[3]));
*pBits = *pBits | (gBits[1][0] << 0);
*pBits = *pBits | (gBits[1][1] << 3);
*pBits = *pBits | (gBits[1][2] << 6);
*pBits = *pBits | (gBits[1][3] << 9);
*pBits = *pBits | (gBits[0][0] << 12);
*pBits = *pBits | (gBits[0][1] << 15);
*pBits = *pBits | (gBits[0][2] << 18);
*pBits = *pBits | (gBits[0][3] << 21);
}
//
// flip a DXT5 color block
////////////////////////////////////////////////////////////
void Image::flip_blocks_dxtc5(GLubyte *ptr, unsigned int numBlocks)
{
DXTColBlock *curblock = (DXTColBlock*)ptr;
DXT5AlphaBlock *alphablock;
GLubyte temp;
for (unsigned int i = 0; i < numBlocks; i++)
{
alphablock = (DXT5AlphaBlock*)curblock;
flip_dxt5_alpha(alphablock);
curblock++;
temp = curblock->row[0];
curblock->row[0] = curblock->row[3];
curblock->row[3] = temp;
temp = curblock->row[1];
curblock->row[1] = curblock->row[2];
curblock->row[2] = temp;
curblock++;
}
}
}
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