449 lines
11 KiB
C++
449 lines
11 KiB
C++
#include "texture_loader_dds.h"
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#include "os/file_access.h"
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enum {
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DDS_MAGIC=0x20534444,
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DDSD_CAPS=0x00000001,
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DDSD_PIXELFORMAT=0x00001000,
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DDSD_PITCH=0x00000008,
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DDSD_LINEARSIZE=0x00080000,
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DDSD_MIPMAPCOUNT=0x00020000,
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DDPF_FOURCC=0x00000004,
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DDPF_ALPHAPIXELS=0x00000001,
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DDPF_INDEXED=0x00000020,
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DDPF_RGB=0x00000040,
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};
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enum DDSFormat {
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DDS_DXT1,
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DDS_DXT3,
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DDS_DXT5,
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DDS_ATI1,
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DDS_ATI2,
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DDS_BGRA8,
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DDS_BGR8,
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DDS_RGBA8, //flipped in dds
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DDS_RGB8, //flipped in dds
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DDS_BGR5A1,
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DDS_BGR565,
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DDS_BGR10A2,
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DDS_INDEXED,
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DDS_LUMINANCE,
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DDS_LUMINANCE_ALPHA,
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DDS_MAX
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};
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struct DDSFormatInfo {
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const char *name;
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bool compressed;
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bool palette;
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uint32_t divisor;
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uint32_t block_size;
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Image::Format format;
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};
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static const DDSFormatInfo dds_format_info[DDS_MAX]={
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{"DXT1",true,false,4,8,Image::FORMAT_BC1},
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{"DXT3",true,false,4,16,Image::FORMAT_BC2},
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{"DXT5",true,false,4,16,Image::FORMAT_BC3},
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{"ATI1",true,false,4,8,Image::FORMAT_BC4},
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{"ATI2",true,false,4,16,Image::FORMAT_BC5},
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{"BGRA8",false,false,1,4,Image::FORMAT_RGBA},
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{"BGR8",false,false,1,3,Image::FORMAT_RGB},
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{"RGBA8",false,false,1,4,Image::FORMAT_RGBA},
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{"RGB8",false,false,1,3,Image::FORMAT_RGB},
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{"BGR5A1",false,false,1,2,Image::FORMAT_RGBA},
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{"BGR565",false,false,1,2,Image::FORMAT_RGB},
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{"BGR10A2",false,false,1,4,Image::FORMAT_RGBA},
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{"INDEXED",false,true,1,1,Image::FORMAT_INDEXED},
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{"GRAYSCALE",false,false,1,1,Image::FORMAT_GRAYSCALE},
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{"GRAYSCALE_ALPHA",false,false,1,2,Image::FORMAT_GRAYSCALE_ALPHA}
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};
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RES ResourceFormatDDS::load(const String &p_path,const String& p_original_path) {
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Error err;
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FileAccess *f = FileAccess::open(p_path,FileAccess::READ,&err);
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if (!f)
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return RES();
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FileAccessRef fref(f);
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ERR_EXPLAIN("Unable to open DDS texture file: "+p_path);
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ERR_FAIL_COND_V(err!=OK,RES());
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uint32_t magic = f->get_32();
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uint32_t hsize = f->get_32();
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uint32_t flags = f->get_32();
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uint32_t width = f->get_32();
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uint32_t height = f->get_32();
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uint32_t pitch = f->get_32();
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uint32_t depth = f->get_32();
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uint32_t mipmaps = f->get_32();
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//skip 11
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for(int i=0;i<11;i++)
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f->get_32();
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//validate
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if (magic!=DDS_MAGIC || hsize!=124 || !(flags&DDSD_PIXELFORMAT) || !(flags&DDSD_CAPS)) {
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ERR_EXPLAIN("Invalid or Unsupported DDS texture file: "+p_path);
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ERR_FAIL_V(RES());
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}
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uint32_t format_size = f->get_32();
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uint32_t format_flags = f->get_32();
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uint32_t format_fourcc = f->get_32();
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uint32_t format_rgb_bits = f->get_32();
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uint32_t format_red_mask = f->get_32();
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uint32_t format_green_mask = f->get_32();
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uint32_t format_blue_mask = f->get_32();
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uint32_t format_alpha_mask = f->get_32();
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uint32_t caps_1 = f->get_32();
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uint32_t caps_2 = f->get_32();
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uint32_t caps_ddsx = f->get_32();
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//reserved skip
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f->get_32();
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f->get_32();
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/*print_line("DDS width: "+itos(width));
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print_line("DDS height: "+itos(height));
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print_line("DDS mipmaps: "+itos(mipmaps));*/
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//printf("fourcc: %x fflags: %x, rgbbits: %x, fsize: %x\n",format_fourcc,format_flags,format_rgb_bits,format_size);
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//printf("rmask: %x gmask: %x, bmask: %x, amask: %x\n",format_red_mask,format_green_mask,format_blue_mask,format_alpha_mask);
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//must avoid this later
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while(f->get_pos()<128)
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f->get_8();
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DDSFormat dds_format;
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if (format_flags&DDPF_FOURCC && format_fourcc=='1TXD') {
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dds_format=DDS_DXT1;
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} else if (format_flags&DDPF_FOURCC && format_fourcc=='3TXD') {
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dds_format=DDS_DXT3;
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} else if (format_flags&DDPF_FOURCC && format_fourcc=='5TXD') {
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dds_format=DDS_DXT5;
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} else if (format_flags&DDPF_FOURCC && format_fourcc=='1ITA') {
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dds_format=DDS_ATI1;
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} else if (format_flags&DDPF_FOURCC && format_fourcc=='2ITA') {
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dds_format=DDS_ATI2;
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} else if (format_flags&DDPF_RGB && format_flags&DDPF_ALPHAPIXELS && format_rgb_bits==32 && format_red_mask==0xff0000 && format_green_mask==0xff00 && format_blue_mask==0xff && format_alpha_mask==0xff000000) {
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dds_format=DDS_BGRA8;
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} else if (format_flags&DDPF_RGB && !(format_flags&DDPF_ALPHAPIXELS ) && format_rgb_bits==24 && format_red_mask==0xff0000 && format_green_mask==0xff00 && format_blue_mask==0xff) {
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dds_format=DDS_BGR8;
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} else if (format_flags&DDPF_RGB && format_flags&DDPF_ALPHAPIXELS && format_rgb_bits==32 && format_red_mask==0xff && format_green_mask==0xff00 && format_blue_mask==0xff0000 && format_alpha_mask==0xff000000) {
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dds_format=DDS_RGBA8;
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} else if (format_flags&DDPF_RGB && !(format_flags&DDPF_ALPHAPIXELS ) && format_rgb_bits==24 && format_red_mask==0xff && format_green_mask==0xff00 && format_blue_mask==0xff0000) {
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dds_format=DDS_RGB8;
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} else if (format_flags&DDPF_RGB && format_flags&DDPF_ALPHAPIXELS && format_rgb_bits==16 && format_red_mask==0x00007c00 && format_green_mask==0x000003e0 && format_blue_mask==0x0000001f && format_alpha_mask==0x00008000) {
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dds_format=DDS_BGR5A1;
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} else if (format_flags&DDPF_RGB && format_flags&DDPF_ALPHAPIXELS && format_rgb_bits==32 && format_red_mask==0x3ff00000 && format_green_mask==0xffc00 && format_blue_mask==0x3ff && format_alpha_mask==0xc0000000) {
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dds_format=DDS_BGR10A2;
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} else if (format_flags&DDPF_RGB && !(format_flags&DDPF_ALPHAPIXELS) && format_rgb_bits==16 && format_red_mask==0x0000f800 && format_green_mask==0x000007e0 && format_blue_mask==0x0000001f) {
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dds_format=DDS_BGR565;
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} else if (!(format_flags&DDPF_ALPHAPIXELS) && format_rgb_bits==8 && format_red_mask==0xff && format_green_mask==0xff && format_blue_mask==0xff) {
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dds_format=DDS_LUMINANCE;
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} else if ((format_flags&DDPF_ALPHAPIXELS) && format_rgb_bits==16 && format_red_mask==0xff && format_green_mask==0xff && format_blue_mask==0xff && format_alpha_mask==0xff00) {
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dds_format=DDS_LUMINANCE_ALPHA;
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} else if (format_flags&DDPF_INDEXED && format_rgb_bits==8) {
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dds_format=DDS_BGR565;
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} else {
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printf("unrecognized fourcc %x format_flags: %x - rgbbits %i - red_mask %x green mask %x blue mask %x alpha mask %x\n",format_fourcc,format_flags,format_rgb_bits,format_red_mask,format_green_mask,format_blue_mask,format_alpha_mask);
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ERR_EXPLAIN("Unrecognized or Unsupported color layout in DDS: "+p_path);
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ERR_FAIL_V(RES());
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}
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if (!(flags&DDSD_MIPMAPCOUNT))
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mipmaps=1;
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// print_line("found format: "+String(dds_format_info[dds_format].name));
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DVector<uint8_t> src_data;
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const DDSFormatInfo &info=dds_format_info[dds_format];
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uint32_t w = width;
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uint32_t h = height;
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if (info.compressed) {
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//compressed bc
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uint32_t size = MAX( info.divisor, w )/info.divisor * MAX( info.divisor, h )/info.divisor * info.block_size;
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ERR_FAIL_COND_V( size!=pitch, RES() );
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ERR_FAIL_COND_V( !(flags&DDSD_LINEARSIZE), RES() );
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for(uint32_t i=1;i<mipmaps;i++) {
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w=MAX(1,w>>1);
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h=MAX(1,h>>1);
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uint32_t bsize = MAX( info.divisor, w )/info.divisor * MAX( info.divisor, h )/info.divisor * info.block_size;
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//printf("%i x %i - block: %i\n",w,h,bsize);
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size+= bsize;
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}
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src_data.resize(size);
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DVector<uint8_t>::Write wb = src_data.write();
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f->get_buffer(wb.ptr(),size);
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wb=DVector<uint8_t>::Write();
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} else if (info.palette) {
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//indexed
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ERR_FAIL_COND_V( !(flags&DDSD_PITCH), RES());
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ERR_FAIL_COND_V( format_rgb_bits!=8, RES() );
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uint32_t size = pitch*height;
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ERR_FAIL_COND_V( size != width*height * info.block_size, RES());
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uint8_t pallete[256*4];
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f->get_buffer(pallete,256*4);
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int colsize=3;
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for(int i=0;i<256;i++) {
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if (pallete[i*4+3]<255)
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colsize=4;
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}
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int w = width;
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int h = height;
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for(uint32_t i=1;i<mipmaps;i++) {
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w=(w+1)>>1;
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h=(h+1)>>1;
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size+= w*h*info.block_size;
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}
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src_data.resize(size + 256*colsize );
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DVector<uint8_t>::Write wb = src_data.write();
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f->get_buffer(wb.ptr(),size);
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for(int i=0;i<256;i++) {
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int dst_ofs = size+i*colsize;
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int src_ofs = i*4;
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wb[dst_ofs+0]=pallete[src_ofs+2];
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wb[dst_ofs+1]=pallete[src_ofs+1];
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wb[dst_ofs+2]=pallete[src_ofs+0];
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if (colsize==4)
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wb[dst_ofs+3]=pallete[src_ofs+3];
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}
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wb=DVector<uint8_t>::Write();
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} else {
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//uncompressed generic...
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uint32_t size = width*height*info.block_size;
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for(uint32_t i=1;i<mipmaps;i++) {
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w=(w+1)>>1;
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h=(h+1)>>1;
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size+= w*h*info.block_size;
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}
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if (dds_format==DDS_BGR565)
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size=size*3/2;
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else if (dds_format==DDS_BGR5A1)
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size=size*2;
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src_data.resize(size);
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DVector<uint8_t>::Write wb = src_data.write();
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f->get_buffer(wb.ptr(),size);
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switch(dds_format) {
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case DDS_BGR5A1: {
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// TO RGBA
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int colcount = size/4;
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for(int i=colcount-1;i>=0;i--) {
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int src_ofs = i*2;
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int dst_ofs = i*4;
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uint8_t a=wb[src_ofs+1]&0x80;
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uint8_t b= wb[src_ofs]&0x1F;
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uint8_t g= (wb[src_ofs]>>5) | ((wb[src_ofs+1]&0x3)<<3);
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uint8_t r= (wb[src_ofs+1]>>2)&0x1F;
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wb[dst_ofs+0]=r<<3;
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wb[dst_ofs+1]=g<<3;
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wb[dst_ofs+2]=b<<3;
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wb[dst_ofs+3]=a?255:0;
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}
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} break;
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case DDS_BGR565: {
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int colcount = size/3;
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for(int i=colcount-1;i>=0;i--) {
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int src_ofs = i*2;
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int dst_ofs = i*3;
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uint8_t b= wb[src_ofs]&0x1F;
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uint8_t g= (wb[src_ofs]>>5) | ((wb[src_ofs+1]&0x7)<<3);
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uint8_t r= wb[src_ofs+1]>>3;
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wb[dst_ofs+0]=r<<3;
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wb[dst_ofs+1]=g<<2;
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wb[dst_ofs+2]=b<<3;//b<<3;
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}
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} break;
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case DDS_BGR10A2: {
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// TO RGBA
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int colcount = size/4;
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for(int i=colcount-1;i>=0;i--) {
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int ofs = i*4;
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uint32_t w32 = uint32_t(wb[ofs+0]) | (uint32_t(wb[ofs+1])<<8) | (uint32_t(wb[ofs+2])<<16) | (uint32_t(wb[ofs+3])<<24);
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uint8_t a= (w32&0xc0000000) >> 24;
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uint8_t r= (w32&0x3ff00000) >> 22;
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uint8_t g= (w32&0xffc00) >> 12;
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uint8_t b= (w32&0x3ff) >> 2;
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wb[ofs+0]=r;
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wb[ofs+1]=g;
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wb[ofs+2]=b;
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wb[ofs+3]=a==0xc0 ? 255 : a; //0xc0 should be opaque
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}
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} break;
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case DDS_BGRA8: {
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int colcount = size/4;
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for(int i=0;i<colcount;i++) {
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SWAP( wb[i*4+0],wb[i*4+2] );
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}
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} break;
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case DDS_BGR8: {
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int colcount = size/3;
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for(int i=0;i<colcount;i++) {
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SWAP( wb[i*3+0],wb[i*3+2] );
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}
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} break;
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case DDS_RGBA8: {
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/* do nothing either
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int colcount = size/4;
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for(int i=0;i<colcount;i++) {
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uint8_t r = wb[i*4+1];
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uint8_t g = wb[i*4+2];
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uint8_t b = wb[i*4+3];
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uint8_t a = wb[i*4+0];
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wb[i*4+0]=r;
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wb[i*4+1]=g;
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wb[i*4+2]=b;
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wb[i*4+3]=a;
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}
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*/
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} break;
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case DDS_RGB8: {
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// do nothing
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/*
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int colcount = size/3;
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for(int i=0;i<colcount;i++) {
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SWAP( wb[i*3+0],wb[i*3+2] );
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}*/
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} break;
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case DDS_LUMINANCE: {
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// do nothing i guess?
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} break;
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case DDS_LUMINANCE_ALPHA: {
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// do nothing i guess?
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} break;
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default: {}
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}
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wb=DVector<uint8_t>::Write();
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}
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Image img(width,height,mipmaps-1,info.format,src_data);
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Ref<ImageTexture> texture = memnew( ImageTexture );
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texture->create_from_image(img);
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return texture;
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}
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void ResourceFormatDDS::get_recognized_extensions(List<String> *p_extensions) const {
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p_extensions->push_back("dds");
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}
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bool ResourceFormatDDS::handles_type(const String& p_type) const {
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return ObjectTypeDB::is_type(p_type,"Texture");
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}
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String ResourceFormatDDS::get_resource_type(const String &p_path) const {
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if (p_path.extension().to_lower()=="dds")
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return "ImageTexture";
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return "";
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}
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