forked from 0ad/0ad
763 lines
16 KiB
C++
Executable File
763 lines
16 KiB
C++
Executable File
// OpenGL texturing
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//
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// Copyright (c) 2003 Jan Wassenberg
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public License as
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// published by the Free Software Foundation; either version 2 of the
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// License, or (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, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// General Public License for more details.
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//
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// Contact info:
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// Jan.Wassenberg@stud.uni-karlsruhe.de
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// http://www.stud.uni-karlsruhe.de/~urkt/
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// supported formats: DDS, TGA, BMP, PNG, JP2, RAW
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#include "precompiled.h"
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#include "lib.h"
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#include "res.h"
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#include <math.h>
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#include <stdlib.h>
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#include <assert.h>
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#define NO_JP2
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//#define NO_PNG
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#ifndef NO_JP2
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#include <jasper/jasper.h>
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#endif
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#ifndef NO_PNG
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# ifdef _WIN32
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# define _WINDOWS_ // prevent libpng from including windows.h
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# define WINAPI __stdcall // .. and define what it needs
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# define WINAPIV __cdecl
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# include <libpng10/png.h>
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# ifdef _MSC_VER
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# pragma comment(lib, "libpng10.lib")
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# endif
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# else // _WIN32
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# include <png.h>
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# endif // _WIN32
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#endif // NO_PNG
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/*
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// filled by loader funcs => declare here
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struct Tex
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{
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u32 w : 16;
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u32 h : 16;
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u32 fmt : 16;
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u32 bpp : 16;
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size_t ofs; // offset to image data in file
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Handle hm; // H_MEM handle to loaded file
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uint id;
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int filter;
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int int_fmt;
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};
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*/
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//////////////////////////////////////////////////////////////////////////////
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//
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// DDS
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//
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//////////////////////////////////////////////////////////////////////////////
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#ifndef NO_DDS
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// defs modified from ddraw header
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#pragma pack(push, 1)
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// DDPIXELFORMAT.dwFlags
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#define DDPF_ALPHAPIXELS 0x00000001
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typedef struct
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{
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u32 dwSize; // size of structure (32)
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u32 dwFlags; // indicates which fields are valid
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u32 dwFourCC; // (DDPF_FOURCC) FOURCC code, "DXTn"
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u32 dwReserved1[5]; // reserved
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}
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DDPIXELFORMAT;
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typedef struct
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{
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u32 dwCaps[4];
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}
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DDSCAPS2;
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// DDSURFACEDESC2.dwFlags
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#define DDSD_HEIGHT 0x00000002
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#define DDSD_WIDTH 0x00000004
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#define DDSD_PIXELFORMAT 0x00001000
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#define DDSD_MIPMAPCOUNT 0x00020000
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typedef struct
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{
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u32 dwSize; // size of structure (124)
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u32 dwFlags; // indicates which fields are valid
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u32 dwHeight; // height of main image (pixels)
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u32 dwWidth; // width of main image (pixels)
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u32 dwLinearSize; // (DDSD_LINEARSIZE): total image size
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u32 dwDepth; // (DDSD_DEPTH) vol. textures: vol. depth
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u32 dwMipMapCount; // (DDSD_MIPMAPCOUNT) total # levels
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u32 dwReserved1[11]; // reserved
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DDPIXELFORMAT ddpfPixelFormat; // pixel format description of the surface
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DDSCAPS2 ddsCaps; // direct draw surface capabilities
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u32 dwReserved2; // reserved
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}
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DDSURFACEDESC2;
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#pragma pack(pop)
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static inline bool dds_valid(const u8* ptr, size_t size)
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{
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UNUSED(size) // only need first 4 chars
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return *(u32*)ptr == FOURCC('D','D','S',' ');
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}
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// TODO: DXT1a?
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static int dds_load(const char* fn, const u8* p, size_t size, TexInfo* t)
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{
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const char* err = 0;
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const DDSURFACEDESC2* surf = (const DDSURFACEDESC2*)(p+4);
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const u32 hdr_size = 4+sizeof(DDSURFACEDESC2);
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// make sure we can access all header fields
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if(size < hdr_size)
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{
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err = "header not completely read";
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fail:
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debug_out("dds_load: %s: %s\n", fn, err);
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return -1;
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}
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const u32 sd_size = read_le32(&surf->dwSize);
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const u32 sd_flags = read_le32(&surf->dwFlags);
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const u32 h = read_le32(&surf->dwHeight);
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const u32 w = read_le32(&surf->dwWidth);
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const u32 img_size = read_le32(&surf->dwLinearSize);
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u32 mipmaps = read_le32(&surf->dwMipMapCount);
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const u32 pf_size = read_le32(&surf->ddpfPixelFormat.dwSize);
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const u32 pf_flags = read_le32(&surf->ddpfPixelFormat.dwFlags);
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const u32 fourcc = surf->ddpfPixelFormat.dwFourCC;
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// compared against FOURCC, which takes care of endian conversion.
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// we'll use these fields; make sure they're present below.
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// note: we can't guess image dimensions if not specified -
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// the image isn't necessarily square.
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const u32 sd_req_flags = DDSD_WIDTH | DDSD_HEIGHT | DDSD_PIXELFORMAT;
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// make sure fields that aren't indicated as valid are zeroed.
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if(!(sd_flags & DDSD_MIPMAPCOUNT))
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mipmaps = 0;
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// MS DXTex tool doesn't set the required dwPitchOrLinearSize field -
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// they can't even write out their own file format correctly. *sigh*
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// we need to pass to OpenGL; it's calculated from w, h, and bpp,
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// which we determine from the pixel format.
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int bpp = 0;
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int flags = 0;
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if(pf_flags & DDPF_ALPHAPIXELS)
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flags |= TEX_ALPHA;
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switch(fourcc)
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{
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case FOURCC('D','X','T','1'):
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bpp = 4;
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flags |= 1;
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break;
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case FOURCC('D','X','T','3'):
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bpp = 8;
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flags |= 3;
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break;
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case FOURCC('D','X','T','5'):
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bpp = 8;
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flags |= 5;
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break;
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}
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if(size < hdr_size + img_size)
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err = "image not completely loaded";
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if(w % 4 || h % 4)
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err = "image dimensions not padded to S3TC block size";
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if(!w || !h)
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err = "width or height = 0";
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if(mipmaps > 0)
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err = "contains mipmaps";
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if(bpp == 0)
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err = "invalid pixel format (not DXT{1,3,5})";
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if((sd_flags & sd_req_flags) != sd_req_flags)
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err = "missing one or more required fields (w, h, pixel format)";
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if(sizeof(DDPIXELFORMAT) != pf_size)
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err = "DDPIXELFORMAT size mismatch";
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if(sizeof(DDSURFACEDESC2) != sd_size)
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err = "DDSURFACEDESC2 size mismatch";
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if(err)
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goto fail;
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t->ofs = hdr_size;
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t->w = w;
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t->h = h;
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t->bpp = bpp;
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t->flags = flags;
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return 0;
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}
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#endif
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//////////////////////////////////////////////////////////////////////////////
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//
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// TGA
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//
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//////////////////////////////////////////////////////////////////////////////
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#ifndef NO_TGA
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static inline bool tga_valid(const u8* ptr, size_t size)
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{
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UNUSED(size)
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// no color map; uncompressed grayscale or true color
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return (ptr[1] == 0 && (ptr[2] == 2 || ptr[2] == 3));
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}
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// requirements: uncompressed, direct color, bottom up
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static int tga_load(const char* fn, const u8* ptr, size_t size, TexInfo* t)
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{
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const char* err = 0;
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const u8 img_id_len = ptr[0];
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const uint hdr_size = 18+img_id_len;
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// make sure we can access all header fields
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if(size < hdr_size)
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{
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err = "header not completely read";
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fail:
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debug_out("tga_load: %s: %s\n", fn, err);
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return -1;
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}
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const u8 type = ptr[2];
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const u16 w = read_le16(ptr+12);
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const u16 h = read_le16(ptr+14);
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const u8 bpp = ptr[16];
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const u8 desc = ptr[17];
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const u8 alpha_bits = desc & 0x0f;
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const ulong img_size = (ulong)w * h * bpp / 8;
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int flags = 0;
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if(alpha_bits != 0)
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flags |= TEX_ALPHA;
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// true color
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if(type == 2)
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flags |= TEX_BGR;
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if(desc & 0x30)
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err = "image is not bottom-up and left-to-right";
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if(size < hdr_size + img_size)
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err = "size < image size";
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if(err)
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goto fail;
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t->ofs = hdr_size;
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t->w = w;
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t->h = h;
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t->bpp = bpp;
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t->flags = flags;
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return 0;
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}
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#endif
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//////////////////////////////////////////////////////////////////////////////
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//
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// BMP
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//
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//////////////////////////////////////////////////////////////////////////////
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#ifndef NO_BMP
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#pragma pack(push, 1)
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struct BITMAPFILEHEADER
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{
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u16 bfType; // "BM"
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u32 bfSize; // of file
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u32 reserved;
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u32 bfOffBits; // offset to image data
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};
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// BITMAPCOREHEADER + compression field
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struct BITMAPCOREHEADER2
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{
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u32 biSize;
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long biWidth;
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long biHeight;
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u16 biPlanes; // = 1
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u16 biBitCount; // bpp
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u32 biCompression;
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};
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#pragma pack(pop)
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#define BI_RGB 0 // bch->biCompression
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static inline bool bmp_valid(const u8* ptr, size_t size)
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{
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UNUSED(size)
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// bfType == BM? (check single bytes => endian safe)
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return ptr[0] == 'B' && ptr[1] == 'M';
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}
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// requirements: uncompressed, direct color, bottom up
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static int bmp_load(const char* fn, const u8* ptr, size_t size, TexInfo* t)
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{
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const char* err = 0;
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const int hdr_size = sizeof(BITMAPFILEHEADER) + sizeof(BITMAPCOREHEADER2);
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// make sure we can access all header fields
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if(size < hdr_size)
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{
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err = "header not completely read";
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fail:
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debug_out("bmp_load: %s: %s\n", fn, err);
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return -1;
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}
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BITMAPFILEHEADER* bfh = (BITMAPFILEHEADER*)ptr;
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BITMAPCOREHEADER2* bch = (BITMAPCOREHEADER2*)(ptr+sizeof(BITMAPFILEHEADER));
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const long w = read_le32(&bch->biWidth);
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const long h = read_le32(&bch->biHeight);
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const u16 bpp = read_le16(&bch->biBitCount);
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const u32 compress = read_le32(&bch->biCompression);
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const u32 ofs = read_le32(&bfh->bfOffBits);
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const u32 img_size = w * h * bpp/8;
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int flags = TEX_BGR;
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if(bpp == 32)
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flags |= TEX_ALPHA;
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if(h < 0)
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err = "top-down";
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if(compress != BI_RGB)
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err = "compressed";
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if(bpp < 24)
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err = "not direct color";
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if(size < ofs+img_size)
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err = "image not completely read";
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if(err)
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goto fail;
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t->ofs = ofs;
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t->w = w;
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t->h = h;
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t->bpp = bpp;
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t->flags = flags;
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return 0;
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}
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static int bmp_write(void*& out_buf, const u8* img, const size_t size, TexInfo* t)
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{
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const size_t hdr_size = sizeof(BITMAPFILEHEADER) + sizeof(BITMAPCOREHEADER2);
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const size_t file_size = size+hdr_size;
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out_buf = mem_alloc(file_size);
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BITMAPFILEHEADER* bfh = (BITMAPFILEHEADER*)out_buf;
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char* type = (char*)bfh;
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type[0] = 'B'; type[1] = 'M';
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bfh->bfSize = (u32)file_size;
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bfh->reserved = 0;
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bfh->bfOffBits = hdr_size;
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BITMAPCOREHEADER2* bch = (BITMAPCOREHEADER2*)((char*)out_buf+sizeof(BITMAPFILEHEADER));
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bch->biSize = sizeof(BITMAPCOREHEADER2);
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bch->biWidth = t->w;
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bch->biHeight = t->h;
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bch->biPlanes = 1;
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bch->biBitCount = t->bpp;
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bch->biCompression = 0;
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memcpy((char*)out_buf+hdr_size, img, size);
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return 0;
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}
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#endif
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//////////////////////////////////////////////////////////////////////////////
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//
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// RAW
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//
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//////////////////////////////////////////////////////////////////////////////
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#ifndef NO_RAW
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static inline bool raw_valid(const u8* p, size_t size)
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{
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UNUSED(p)
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UNUSED(size)
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return true;
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}
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static int raw_load(const char* fn, const u8* ptr, size_t size, TexInfo* t)
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{
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UNUSED(ptr);
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// TODO: allow 8 bit format. problem: how to differentiate from 32? filename?
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for(uint i = 2; i <= 4; i++)
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{
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const u32 dim = (u32)sqrtf((float)size/i);
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if(dim*dim*i != size)
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continue;
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// formats are: GL_LUMINANCE_ALPHA, GL_RGB, GL_RGBA
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int flags = (i == 3)? 0 : TEX_ALPHA;
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t->ofs = 0;
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t->w = dim;
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t->h = dim;
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t->bpp = i*8;
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t->flags = flags;
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return 0;
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}
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debug_out("raw_load: %s: %s\n", fn, "no matching format found");
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return -1;
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}
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#endif
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//////////////////////////////////////////////////////////////////////////////
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//
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// PNG
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//
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//////////////////////////////////////////////////////////////////////////////
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#ifndef NO_PNG
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struct MemRange
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{
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const u8* p;
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size_t size;
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};
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static void png_read_fn(png_struct* const png_ptr, u8* const data, const png_size_t length)
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{
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MemRange* const mr = (MemRange*)png_ptr->io_ptr;
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if(mr->size < length)
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png_error(png_ptr, "png_read_fn: not enough data to satisfy request!");
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memcpy(data, mr->p, length);
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mr->p += length;
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mr->size -= length; // >= 0 due to test above
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}
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static inline bool png_valid(const u8* ptr, size_t size)
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{
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return png_sig_cmp((u8*)ptr, 0, MIN(size, 8)) == 0;
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}
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// requirement: direct color
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static int png_load(const char* fn, const u8* ptr, size_t size, TexInfo* t)
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{
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const char* msg = 0;
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int err = -1;
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const u8** rows = 0;
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// freed in cleanup code; need scoping on VC6 due to goto
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// allocate PNG structures
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png_structp png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, 0, 0, 0);
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if(!png_ptr)
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return ERR_NO_MEM;
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png_infop info_ptr = png_create_info_struct(png_ptr);
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if(!info_ptr)
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{
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err = ERR_NO_MEM;
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goto fail;
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}
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// setup error handling
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if(setjmp(png_jmpbuf(png_ptr)))
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{
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fail:
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debug_out("png_load: %s: %s\n", fn, msg? msg : "unknown");
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goto ret;
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}
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{
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MemRange mr = { ptr, size };
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png_set_read_fn(png_ptr, &mr, png_read_fn);
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png_read_info(png_ptr, info_ptr);
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unsigned long w, h;
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int prec, color_type;
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png_get_IHDR(png_ptr, info_ptr, &w, &h, &prec, &color_type, 0, 0, 0);
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const size_t pitch = png_get_rowbytes(png_ptr, info_ptr);
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const u32 bpp = (u32)(pitch / w * 8);
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const u32 ofs = 0; // libpng returns decoded image data; no header
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int flags = (bpp == 24)? 0 : TEX_ALPHA;
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if(prec != 8)
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msg = "channel precision != 8 bits";
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if(color_type & 1)
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msg = "color type is invalid (must be direct color)";
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if(msg)
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{
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err = -1;
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goto fail;
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|
}
|
|
|
|
// allocate mem for image - rows point into buffer (sequential)
|
|
rows = (const u8**)malloc(h*sizeof(void*));
|
|
if(!rows)
|
|
goto fail;
|
|
const size_t img_size = pitch * h;
|
|
Handle img_hm;
|
|
const u8* img = (const u8*)mem_alloc(img_size, 64*KB, 0, &img_hm);
|
|
if(!img)
|
|
goto fail;
|
|
const u8* pos = img;
|
|
for(size_t i = 0; i < h; i++)
|
|
{
|
|
rows[i] = pos;
|
|
pos += pitch;
|
|
}
|
|
|
|
png_read_image(png_ptr, (png_bytepp)rows);
|
|
|
|
png_read_end(png_ptr, info_ptr);
|
|
|
|
mem_free_h(t->hm);
|
|
t->hm = img_hm;
|
|
|
|
t->ofs = ofs;
|
|
t->w = w;
|
|
t->h = h;
|
|
t->bpp = bpp;
|
|
t->flags = flags;
|
|
|
|
err = 0;
|
|
|
|
}
|
|
|
|
// shared cleanup
|
|
ret:
|
|
free(rows);
|
|
png_destroy_read_struct(&png_ptr, &info_ptr, 0);
|
|
|
|
return err;
|
|
}
|
|
|
|
#endif
|
|
|
|
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// JP2
|
|
//
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
|
|
#ifndef NO_JP2
|
|
|
|
static inline bool jp2_valid(const u8* p, size_t size)
|
|
{
|
|
static bool initialized;
|
|
if(!initialized)
|
|
{
|
|
jas_init();
|
|
initialized = true;
|
|
}
|
|
|
|
jas_stream_t* stream = jas_stream_memopen((char*)ptr, size);
|
|
return jp2_validate(stream) >= 0;
|
|
}
|
|
|
|
|
|
static int jp2_load(const char* fn, const u8* ptr, size_t size, TexInfo* t)
|
|
{
|
|
const char* err = 0;
|
|
|
|
jas_stream_t* stream = jas_stream_memopen((char*)ptr, size);
|
|
jas_image_t* image = jas_image_decode(stream, -1, 0);
|
|
if(!image)
|
|
return -1;
|
|
|
|
const int num_cmpts = jas_image_numcmpts(image);
|
|
jas_matrix_t* matr[4] = {0};
|
|
jas_seqent_t* rows[4] = {0};
|
|
const u32 w = jas_image_cmptwidth (image, 0);
|
|
const u32 h = jas_image_cmptheight(image, 0);
|
|
const int prec = jas_image_cmptprec (image, 0);
|
|
const u32 bpp = num_cmpts * 8;
|
|
const u32 ofs = 0; // jasper returns decoded image data; no header
|
|
int flags = 0;
|
|
|
|
if(depth != 8)
|
|
{
|
|
err = "channel precision != 8";
|
|
|
|
fail:
|
|
debug_out("jp2_load: %s: %s\n", fn, err);
|
|
// TODO: destroy image
|
|
return -1;
|
|
}
|
|
|
|
size_t img_size = w * h * num_cmpts;
|
|
Handle img_hm;
|
|
u8* img = (u8*)mem_alloc(img_size, 64*KB, 0, &img_hm);
|
|
u8* out = img;
|
|
|
|
int cmpt;
|
|
for(cmpt = 0; cmpt < num_cmpts; cmpt++)
|
|
matr[cmpt] = jas_matrix_create(1, w);
|
|
|
|
for(int y = 0; y < h; y++)
|
|
{
|
|
for(cmpt = 0; cmpt < num_cmpts; cmpt++)
|
|
{
|
|
jas_image_readcmpt(image, cmpt, 0, y, w, 1, matr[cmpt]);
|
|
rows[cmpt] = jas_matrix_getref(matr[cmpt], 0, 0);
|
|
}
|
|
|
|
for(int x = 0; x < w; x++)
|
|
for(cmpt = 0; cmpt < num_cmpts; cmpt++)
|
|
*out++ = *rows[cmpt]++;
|
|
}
|
|
|
|
for(cmpt = 0; cmpt < num_cmpts; cmpt++)
|
|
jas_matrix_destroy(matr[cmpt]);
|
|
|
|
mem_free_h(t->hm);
|
|
t->hm = img_hm;
|
|
|
|
t->ofs = ofs;
|
|
t->w = w;
|
|
t->h = h;
|
|
t->bpp = bpp;
|
|
t->flags = flags;
|
|
|
|
return 0;
|
|
}
|
|
|
|
#endif
|
|
|
|
|
|
int tex_load(const char* const fn, TexInfo* t)
|
|
{
|
|
// load file
|
|
void* _p = 0;
|
|
size_t size;
|
|
Handle hm = vfs_load(fn, _p, size);
|
|
if(hm <= 0)
|
|
return (int)hm;
|
|
// guarantee *_valid routines 4 header bytes
|
|
if(size < 4)
|
|
{
|
|
mem_free_h(hm);
|
|
return -1;
|
|
}
|
|
t->hm = hm;
|
|
|
|
int err = -1;
|
|
|
|
// more convenient to pass loaders u8 - less casting
|
|
const u8* p = (const u8*)_p;
|
|
|
|
#ifndef NO_DDS
|
|
if(dds_valid(p, size))
|
|
err = dds_load(fn, p, size, t); else
|
|
#endif
|
|
#ifndef NO_PNG
|
|
if(png_valid(p, size))
|
|
err = png_load(fn, p, size, t); else
|
|
#endif
|
|
#ifndef NO_JP2
|
|
if(jp2_valid(p, size))
|
|
err = jp2_load(fn, p, size, t); else
|
|
#endif
|
|
#ifndef NO_BMP
|
|
if(bmp_valid(p, size))
|
|
err = bmp_load(fn, p, size, t); else
|
|
#endif
|
|
#ifndef NO_TGA
|
|
if(tga_valid(p, size))
|
|
err = tga_load(fn, p, size, t); else
|
|
#endif
|
|
#ifndef NO_RAW
|
|
if(raw_valid(p, size))
|
|
err = raw_load(fn, p, size, t); else
|
|
#endif
|
|
{}; // make sure else-chain is ended
|
|
|
|
if(err < 0)
|
|
{
|
|
mem_free_h(hm);
|
|
return err;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
int tex_free(TexInfo* t)
|
|
{
|
|
mem_free_h(t->hm);
|
|
return 0;
|
|
}
|