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https://github.com/electronicarts/CnC_Renegade.git
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Initial commit of Command & Conquer Renegade source code.
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LFeenanEA
228
Code/ww3d2/ddsfile.h
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228
Code/ww3d2/ddsfile.h
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/*
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** Command & Conquer Renegade(tm)
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** Copyright 2025 Electronic Arts Inc.
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**
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** This program is free software: you can redistribute it and/or modify
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** it under the terms of the GNU General Public License as published by
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** the Free Software Foundation, either version 3 of the License, or
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** (at your option) any later version.
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**
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** This program is distributed in the hope that it will be useful,
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** but WITHOUT ANY WARRANTY; without even the implied warranty of
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** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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** GNU General Public License for more details.
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**
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** You should have received a copy of the GNU General Public License
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** along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef DDSFILE_H
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#define DDSFILE_H
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#if defined(_MSC_VER)
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#pragma once
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#endif
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#include "always.h"
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#include "ww3dformat.h"
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#include "wwstring.h"
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struct IDirect3DSurface8;
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// ----------------------------------------------------------------------------
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//
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// This structure represents the old DX7 color key structure. It is needed
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// LegacyDDSURFACEDESC which is needed when loading DDS files. DO NOT MODIFY!
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//
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// ----------------------------------------------------------------------------
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struct LegacyDDCOLORKEY
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{
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unsigned ColorSpaceLowValue;
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unsigned ColorSpaceHighValue;
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};
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// ----------------------------------------------------------------------------
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//
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// This structure represents the old DX7 CAPS2 structure. It is needed
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// LegacyDDSURFACEDESC which is needed when loading DDS files. DO NOT MODIFY!
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//
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// ----------------------------------------------------------------------------
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struct LegacyDDSCAPS2
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{
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unsigned Caps;
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unsigned Caps2;
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unsigned Caps3;
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unsigned Caps4;
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};
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// ----------------------------------------------------------------------------
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//
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// This structure represents the old DX7 pixel format structure. It is needed
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// LegacyDDSURFACEDESC which is needed when loading DDS files. DO NOT MODIFY!
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//
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// ----------------------------------------------------------------------------
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struct LegacyDDPIXELFORMAT
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{
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unsigned Size;
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unsigned Flags;
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unsigned FourCC;
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union
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{
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unsigned RGBBitCount;
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unsigned YUVBitCount;
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unsigned ZBufferBitDepth;
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unsigned AlphaBitDepth;
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unsigned LuminanceBitCount;
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unsigned BumpBitCount;
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};
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union
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{
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unsigned RBitMask;
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unsigned YBitMask;
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unsigned StencilBitDepth;
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unsigned LuminanceBitMask;
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unsigned BumpDuBitMask;
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};
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union
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{
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unsigned GBitMask;
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unsigned UBitMask;
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unsigned ZBitMask;
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unsigned BumpDvBitMask;
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};
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union
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{
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unsigned BBitMask;
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unsigned VBitMask;
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unsigned StencilBitMask;
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unsigned BumpLuminanceBitMask;
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};
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union
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{
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unsigned RGBAlphaBitMask;
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unsigned YUVAlphaBitMask;
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unsigned LuminanceAlphaBitMask;
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unsigned RGBZBitMask;
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unsigned YUVZBitMask;
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};
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};
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// ----------------------------------------------------------------------------
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//
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// This structure represents the old DX7 surface description structure.
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// It is needed when loading DDS files. DO NOT MODIFY!
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//
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// ----------------------------------------------------------------------------
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struct LegacyDDSURFACEDESC2 {
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unsigned Size;
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unsigned Flags;
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unsigned Height;
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unsigned Width;
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union
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{
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unsigned Pitch;
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unsigned LinearSize;
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};
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unsigned BackBufferCount;
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union
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{
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unsigned MipMapCount;
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unsigned RefreshRate;
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};
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unsigned AlphaBitDepth;
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unsigned Reserved;
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void* Surface;
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union
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{
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LegacyDDCOLORKEY CKDestOverlay;
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unsigned EmptyFaceColor;
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};
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LegacyDDCOLORKEY CKDestBlt;
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LegacyDDCOLORKEY CKSrcOverlay;
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LegacyDDCOLORKEY CKSrcBlt;
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LegacyDDPIXELFORMAT PixelFormat;
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LegacyDDSCAPS2 Caps;
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unsigned TextureStage;
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};
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// ----------------------------------------------------------------------------
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//
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// Utility class for loading DDS files. Simply create an instance of the class
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// locally, call Load() and use the copy functions to retrieve the surface.
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// The class handles conversion of the surface to equal compressed formats
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// and all non-compressed formats. the compressed DXTn formats can't be cross-
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// converted except for DXT1 which can be converted to DXT2 (this feature is
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// needed as the NVidia cards have problems with DXT1).
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//
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// ----------------------------------------------------------------------------
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class DDSFileClass
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{
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unsigned Width;
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unsigned Height;
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unsigned FullWidth;
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unsigned FullHeight;
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unsigned MipLevels;
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unsigned long DateTime;
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unsigned ReductionFactor;
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unsigned char* DDSMemory;
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WW3DFormat Format;
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unsigned* LevelSizes;
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unsigned* LevelOffsets;
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LegacyDDSURFACEDESC2 SurfaceDesc;
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char Name[256];
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static unsigned Calculate_DXTC_Surface_Size(unsigned width, unsigned height, WW3DFormat format);
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public:
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// You can pass the name in .tga or .dds format, the class will automatically try and load .dds file.
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// Note that creating the object will only give you image info - call Load() to load the surfaces.
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DDSFileClass(const char* name,unsigned reduction_factor);
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~DDSFileClass();
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unsigned Get_Width(unsigned level) const;
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unsigned Get_Height(unsigned level) const;
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unsigned Get_Full_Width() const { return FullWidth; } // Get the width of level 0 of non-reduced texture
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unsigned Get_Full_Height() const { return FullHeight; } // Get the height of level 0 of non-reduced texture
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unsigned long Get_Date_Time() const { return DateTime; }
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unsigned Get_Mip_Level_Count() const { return MipLevels; }
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const unsigned char* Get_Memory_Pointer(unsigned level) const;
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unsigned Get_Level_Size(unsigned level) const;
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WW3DFormat Get_Format() const { return Format; }
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// Copy pixels to the destination surface.
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void Copy_Level_To_Surface(unsigned level,IDirect3DSurface8* d3d_surface);
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void Copy_Level_To_Surface(
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unsigned level,
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WW3DFormat dest_format,
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unsigned dest_width,
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unsigned dest_height,
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unsigned char* dest_surface,
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unsigned dest_pitch);
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// Get pixel in A8R8G8B8 format. This isn't the fastest possible way of reading data from DDS.
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unsigned Get_Pixel(unsigned level,unsigned x,unsigned y) const;
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// Uncompress one 4x4 block from the compressed image.
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// Returns: true if block contained alpha, false is not
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// Note: Destination can't be DXT or paletted surface!
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bool Get_4x4_Block(
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unsigned char* dest_ptr, // Destination surface pointer
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unsigned dest_pitch, // Destination surface pitch, in bytes
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WW3DFormat dest_format, // Destination surface format, A8R8G8B8 is fastest
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unsigned level, // DDS mipmap level to copy from
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unsigned source_x, // DDS x offset to copy from, must be aligned by 4!
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unsigned source_y) const; // DDS y offset to copy from, must be aligned by 4!
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bool Load();
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bool Is_Available() const { return !!LevelSizes; }
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};
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// ----------------------------------------------------------------------------
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#endif
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