a7f49ac9a1
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664 lines
17 KiB
C++
664 lines
17 KiB
C++
/*************************************************************************/
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/* texture_loader_pvr.cpp */
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/*************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/*************************************************************************/
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/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md). */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/*************************************************************************/
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#include "texture_loader_pvr.h"
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#include "PvrTcEncoder.h"
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#include "RgbaBitmap.h"
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#include "core/os/file_access.h"
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#include <string.h>
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#include <new>
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static void _pvrtc_decompress(Image *p_img);
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enum PVRFLags {
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PVR_HAS_MIPMAPS = 0x00000100,
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PVR_TWIDDLED = 0x00000200,
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PVR_NORMAL_MAP = 0x00000400,
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PVR_BORDER = 0x00000800,
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PVR_CUBE_MAP = 0x00001000,
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PVR_FALSE_MIPMAPS = 0x00002000,
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PVR_VOLUME_TEXTURES = 0x00004000,
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PVR_HAS_ALPHA = 0x00008000,
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PVR_VFLIP = 0x00010000
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};
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RES ResourceFormatPVR::load(const String &p_path, const String &p_original_path, Error *r_error) {
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if (r_error)
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*r_error = ERR_CANT_OPEN;
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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 faref(f);
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ERR_FAIL_COND_V(err, RES());
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if (r_error)
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*r_error = ERR_FILE_CORRUPT;
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uint32_t hsize = f->get_32();
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ERR_FAIL_COND_V(hsize != 52, RES());
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uint32_t height = f->get_32();
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uint32_t width = f->get_32();
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uint32_t mipmaps = f->get_32();
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uint32_t flags = f->get_32();
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uint32_t surfsize = f->get_32();
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f->seek(f->get_position() + 20); // bpp, rmask, gmask, bmask, amask
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uint8_t pvrid[5] = { 0, 0, 0, 0, 0 };
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f->get_buffer(pvrid, 4);
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ERR_FAIL_COND_V(String((char *)pvrid) != "PVR!", RES());
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f->get_32(); // surfcount
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/*
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print_line("height: "+itos(height));
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print_line("width: "+itos(width));
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print_line("mipmaps: "+itos(mipmaps));
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print_line("flags: "+itos(flags));
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print_line("surfsize: "+itos(surfsize));
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print_line("bpp: "+itos(bpp));
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print_line("rmask: "+itos(rmask));
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print_line("gmask: "+itos(gmask));
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print_line("bmask: "+itos(bmask));
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print_line("amask: "+itos(amask));
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print_line("surfcount: "+itos(surfcount));
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*/
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PoolVector<uint8_t> data;
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data.resize(surfsize);
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ERR_FAIL_COND_V(data.size() == 0, RES());
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PoolVector<uint8_t>::Write w = data.write();
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f->get_buffer(&w[0], surfsize);
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err = f->get_error();
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ERR_FAIL_COND_V(err != OK, RES());
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Image::Format format = Image::FORMAT_MAX;
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switch (flags & 0xFF) {
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case 0x18:
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case 0xC: format = (flags & PVR_HAS_ALPHA) ? Image::FORMAT_PVRTC2A : Image::FORMAT_PVRTC2; break;
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case 0x19:
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case 0xD: format = (flags & PVR_HAS_ALPHA) ? Image::FORMAT_PVRTC4A : Image::FORMAT_PVRTC4; break;
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case 0x16:
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format = Image::FORMAT_L8;
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break;
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case 0x17:
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format = Image::FORMAT_LA8;
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break;
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case 0x20:
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case 0x80:
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case 0x81:
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format = Image::FORMAT_DXT1;
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break;
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case 0x21:
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case 0x22:
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case 0x82:
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case 0x83:
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format = Image::FORMAT_DXT3;
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break;
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case 0x23:
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case 0x24:
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case 0x84:
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case 0x85:
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format = Image::FORMAT_DXT5;
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break;
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case 0x4:
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case 0x15:
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format = Image::FORMAT_RGB8;
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break;
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case 0x5:
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case 0x12:
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format = Image::FORMAT_RGBA8;
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break;
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case 0x36:
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format = Image::FORMAT_ETC;
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break;
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default:
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ERR_FAIL_V_MSG(RES(), "Unsupported format in PVR texture: " + itos(flags & 0xFF) + ".");
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}
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w.release();
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int tex_flags = Texture::FLAG_FILTER | Texture::FLAG_REPEAT;
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if (mipmaps)
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tex_flags |= Texture::FLAG_MIPMAPS;
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Ref<Image> image = memnew(Image(width, height, mipmaps, format, data));
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ERR_FAIL_COND_V(image->empty(), RES());
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Ref<ImageTexture> texture = memnew(ImageTexture);
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texture->create_from_image(image, tex_flags);
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if (r_error)
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*r_error = OK;
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return texture;
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}
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void ResourceFormatPVR::get_recognized_extensions(List<String> *p_extensions) const {
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p_extensions->push_back("pvr");
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}
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bool ResourceFormatPVR::handles_type(const String &p_type) const {
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return ClassDB::is_parent_class(p_type, "Texture");
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}
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String ResourceFormatPVR::get_resource_type(const String &p_path) const {
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if (p_path.get_extension().to_lower() == "pvr")
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return "Texture";
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return "";
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}
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static void _compress_pvrtc4(Image *p_img) {
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Ref<Image> img = p_img->duplicate();
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bool make_mipmaps = false;
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if (!img->is_size_po2() || img->get_width() != img->get_height()) {
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make_mipmaps = img->has_mipmaps();
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img->resize_to_po2(true);
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}
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img->convert(Image::FORMAT_RGBA8);
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if (!img->has_mipmaps() && make_mipmaps)
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img->generate_mipmaps();
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bool use_alpha = img->detect_alpha();
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Ref<Image> new_img;
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new_img.instance();
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new_img->create(img->get_width(), img->get_height(), img->has_mipmaps(), use_alpha ? Image::FORMAT_PVRTC4A : Image::FORMAT_PVRTC4);
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PoolVector<uint8_t> data = new_img->get_data();
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{
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PoolVector<uint8_t>::Write wr = data.write();
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PoolVector<uint8_t>::Read r = img->get_data().read();
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for (int i = 0; i <= new_img->get_mipmap_count(); i++) {
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int ofs, size, w, h;
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img->get_mipmap_offset_size_and_dimensions(i, ofs, size, w, h);
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Javelin::RgbaBitmap bm(w, h);
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for (int j = 0; j < size / 4; j++) {
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Javelin::ColorRgba<unsigned char> *dp = bm.GetData();
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/* red and Green colors are swapped. */
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new (dp) Javelin::ColorRgba<unsigned char>(r[ofs + 4 * j + 2], r[ofs + 4 * j + 1], r[ofs + 4 * j], r[ofs + 4 * j + 3]);
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}
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new_img->get_mipmap_offset_size_and_dimensions(i, ofs, size, w, h);
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Javelin::PvrTcEncoder::EncodeRgba4Bpp(&wr[ofs], bm);
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}
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}
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p_img->create(new_img->get_width(), new_img->get_height(), new_img->has_mipmaps(), new_img->get_format(), data);
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}
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ResourceFormatPVR::ResourceFormatPVR() {
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Image::_image_decompress_pvrtc = _pvrtc_decompress;
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Image::_image_compress_pvrtc4_func = _compress_pvrtc4;
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Image::_image_compress_pvrtc2_func = _compress_pvrtc4;
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}
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/////////////////////////////////////////////////////////
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//PVRTC decompressor, Based on PVRTC decompressor by IMGTEC.
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/////////////////////////////////////////////////////////
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#define PT_INDEX 2
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#define BLK_Y_SIZE 4
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#define BLK_X_MAX 8
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#define BLK_X_2BPP 8
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#define BLK_X_4BPP 4
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#define WRAP_COORD(Val, Size) ((Val) & ((Size)-1))
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/*
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Define an expression to either wrap or clamp large or small vals to the
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legal coordinate range
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*/
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#define LIMIT_COORD(Val, Size, p_tiled) \
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((p_tiled) ? WRAP_COORD((Val), (Size)) : CLAMP((Val), 0, (Size)-1))
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struct PVRTCBlock {
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//blocks are 64 bits
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uint32_t data[2];
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};
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_FORCE_INLINE_ bool is_po2(uint32_t p_input) {
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if (p_input == 0)
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return 0;
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uint32_t minus1 = p_input - 1;
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return ((p_input | minus1) == (p_input ^ minus1)) ? 1 : 0;
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}
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static void unpack_5554(const PVRTCBlock *p_block, int p_ab_colors[2][4]) {
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uint32_t raw_bits[2];
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raw_bits[0] = p_block->data[1] & (0xFFFE);
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raw_bits[1] = p_block->data[1] >> 16;
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for (int i = 0; i < 2; i++) {
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if (raw_bits[i] & (1 << 15)) {
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p_ab_colors[i][0] = (raw_bits[i] >> 10) & 0x1F;
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p_ab_colors[i][1] = (raw_bits[i] >> 5) & 0x1F;
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p_ab_colors[i][2] = raw_bits[i] & 0x1F;
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if (i == 0)
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p_ab_colors[0][2] |= p_ab_colors[0][2] >> 4;
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p_ab_colors[i][3] = 0xF;
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} else {
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p_ab_colors[i][0] = (raw_bits[i] >> (8 - 1)) & 0x1E;
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p_ab_colors[i][1] = (raw_bits[i] >> (4 - 1)) & 0x1E;
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p_ab_colors[i][0] |= p_ab_colors[i][0] >> 4;
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p_ab_colors[i][1] |= p_ab_colors[i][1] >> 4;
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p_ab_colors[i][2] = (raw_bits[i] & 0xF) << 1;
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if (i == 0)
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p_ab_colors[0][2] |= p_ab_colors[0][2] >> 3;
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else
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p_ab_colors[0][2] |= p_ab_colors[0][2] >> 4;
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p_ab_colors[i][3] = (raw_bits[i] >> 11) & 0xE;
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}
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}
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}
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static void unpack_modulations(const PVRTCBlock *p_block, const int p_2bit, int p_modulation[8][16], int p_modulation_modes[8][16], int p_x, int p_y) {
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int block_mod_mode = p_block->data[1] & 1;
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uint32_t modulation_bits = p_block->data[0];
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if (p_2bit && block_mod_mode) {
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for (int y = 0; y < BLK_Y_SIZE; y++) {
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for (int x = 0; x < BLK_X_2BPP; x++) {
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p_modulation_modes[y + p_y][x + p_x] = block_mod_mode;
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if (((x ^ y) & 1) == 0) {
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p_modulation[y + p_y][x + p_x] = modulation_bits & 3;
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modulation_bits >>= 2;
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}
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}
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}
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} else if (p_2bit) {
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for (int y = 0; y < BLK_Y_SIZE; y++) {
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for (int x = 0; x < BLK_X_2BPP; x++) {
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p_modulation_modes[y + p_y][x + p_x] = block_mod_mode;
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if (modulation_bits & 1)
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p_modulation[y + p_y][x + p_x] = 0x3;
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else
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p_modulation[y + p_y][x + p_x] = 0x0;
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modulation_bits >>= 1;
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}
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}
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} else {
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for (int y = 0; y < BLK_Y_SIZE; y++) {
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for (int x = 0; x < BLK_X_4BPP; x++) {
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p_modulation_modes[y + p_y][x + p_x] = block_mod_mode;
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p_modulation[y + p_y][x + p_x] = modulation_bits & 3;
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modulation_bits >>= 2;
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}
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}
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}
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ERR_FAIL_COND(modulation_bits != 0);
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}
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static void interpolate_colors(const int p_colorp[4], const int p_colorq[4], const int p_colorr[4], const int p_colors[4], bool p_2bit, const int x, const int y, int r_result[4]) {
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int u, v, uscale;
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int k;
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int tmp1, tmp2;
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int P[4], Q[4], R[4], S[4];
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for (k = 0; k < 4; k++) {
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P[k] = p_colorp[k];
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Q[k] = p_colorq[k];
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R[k] = p_colorr[k];
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S[k] = p_colors[k];
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}
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v = (y & 0x3) | ((~y & 0x2) << 1);
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if (p_2bit)
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u = (x & 0x7) | ((~x & 0x4) << 1);
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else
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u = (x & 0x3) | ((~x & 0x2) << 1);
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v = v - BLK_Y_SIZE / 2;
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if (p_2bit) {
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u = u - BLK_X_2BPP / 2;
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uscale = 8;
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} else {
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u = u - BLK_X_4BPP / 2;
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uscale = 4;
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}
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for (k = 0; k < 4; k++) {
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tmp1 = P[k] * uscale + u * (Q[k] - P[k]);
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tmp2 = R[k] * uscale + u * (S[k] - R[k]);
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tmp1 = tmp1 * 4 + v * (tmp2 - tmp1);
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r_result[k] = tmp1;
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}
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if (p_2bit) {
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for (k = 0; k < 3; k++) {
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r_result[k] >>= 2;
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}
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r_result[3] >>= 1;
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} else {
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for (k = 0; k < 3; k++) {
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r_result[k] >>= 1;
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}
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}
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for (k = 0; k < 4; k++) {
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ERR_FAIL_COND(r_result[k] >= 256);
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}
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for (k = 0; k < 3; k++) {
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r_result[k] += r_result[k] >> 5;
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}
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r_result[3] += r_result[3] >> 4;
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for (k = 0; k < 4; k++) {
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ERR_FAIL_COND(r_result[k] >= 256);
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}
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}
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static void get_modulation_value(int x, int y, const int p_2bit, const int p_modulation[8][16], const int p_modulation_modes[8][16], int *r_mod, int *p_dopt) {
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static const int rep_vals0[4] = { 0, 3, 5, 8 };
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static const int rep_vals1[4] = { 0, 4, 4, 8 };
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int mod_val;
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y = (y & 0x3) | ((~y & 0x2) << 1);
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if (p_2bit)
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x = (x & 0x7) | ((~x & 0x4) << 1);
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else
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x = (x & 0x3) | ((~x & 0x2) << 1);
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*p_dopt = 0;
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if (p_modulation_modes[y][x] == 0) {
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mod_val = rep_vals0[p_modulation[y][x]];
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} else if (p_2bit) {
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if (((x ^ y) & 1) == 0)
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mod_val = rep_vals0[p_modulation[y][x]];
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else if (p_modulation_modes[y][x] == 1) {
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mod_val = (rep_vals0[p_modulation[y - 1][x]] +
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rep_vals0[p_modulation[y + 1][x]] +
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rep_vals0[p_modulation[y][x - 1]] +
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rep_vals0[p_modulation[y][x + 1]] + 2) /
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4;
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} else if (p_modulation_modes[y][x] == 2) {
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mod_val = (rep_vals0[p_modulation[y][x - 1]] +
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rep_vals0[p_modulation[y][x + 1]] + 1) /
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2;
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} else {
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mod_val = (rep_vals0[p_modulation[y - 1][x]] +
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rep_vals0[p_modulation[y + 1][x]] + 1) /
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2;
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}
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} else {
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mod_val = rep_vals1[p_modulation[y][x]];
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*p_dopt = p_modulation[y][x] == PT_INDEX;
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}
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*r_mod = mod_val;
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}
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static int disable_twiddling = 0;
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static uint32_t twiddle_uv(uint32_t p_height, uint32_t p_width, uint32_t p_y, uint32_t p_x) {
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uint32_t twiddled;
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uint32_t min_dimension;
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uint32_t max_value;
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uint32_t scr_bit_pos;
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uint32_t dst_bit_pos;
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int shift_count;
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ERR_FAIL_COND_V(p_y >= p_height, 0);
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ERR_FAIL_COND_V(p_x >= p_width, 0);
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ERR_FAIL_COND_V(!is_po2(p_height), 0);
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ERR_FAIL_COND_V(!is_po2(p_width), 0);
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if (p_height < p_width) {
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min_dimension = p_height;
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max_value = p_x;
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} else {
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min_dimension = p_width;
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max_value = p_y;
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}
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if (disable_twiddling)
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return (p_y * p_width + p_x);
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scr_bit_pos = 1;
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dst_bit_pos = 1;
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twiddled = 0;
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shift_count = 0;
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while (scr_bit_pos < min_dimension) {
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if (p_y & scr_bit_pos) {
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twiddled |= dst_bit_pos;
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}
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if (p_x & scr_bit_pos) {
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twiddled |= (dst_bit_pos << 1);
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}
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scr_bit_pos <<= 1;
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dst_bit_pos <<= 2;
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shift_count += 1;
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}
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max_value >>= shift_count;
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twiddled |= (max_value << (2 * shift_count));
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return twiddled;
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}
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static void decompress_pvrtc(PVRTCBlock *p_comp_img, const int p_2bit, const int p_width, const int p_height, const int p_tiled, unsigned char *p_dst) {
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int x, y;
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int i, j;
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int block_x, blk_y;
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int block_xp1, blk_yp1;
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int x_block_size;
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int block_width, block_height;
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int p_x, p_y;
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int p_modulation[8][16] = { { 0 } };
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int p_modulation_modes[8][16] = { { 0 } };
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int Mod, DoPT;
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unsigned int u_pos;
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// local neighbourhood of blocks
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PVRTCBlock *p_blocks[2][2];
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PVRTCBlock *prev[2][2] = { { NULL, NULL }, { NULL, NULL } };
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struct
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{
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int Reps[2][4];
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} colors5554[2][2];
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int ASig[4], BSig[4];
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int r_result[4];
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if (p_2bit)
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x_block_size = BLK_X_2BPP;
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else
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x_block_size = BLK_X_4BPP;
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block_width = MAX(2, p_width / x_block_size);
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block_height = MAX(2, p_height / BLK_Y_SIZE);
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for (y = 0; y < p_height; y++) {
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for (x = 0; x < p_width; x++) {
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block_x = (x - x_block_size / 2);
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blk_y = (y - BLK_Y_SIZE / 2);
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block_x = LIMIT_COORD(block_x, p_width, p_tiled);
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blk_y = LIMIT_COORD(blk_y, p_height, p_tiled);
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block_x /= x_block_size;
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blk_y /= BLK_Y_SIZE;
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block_xp1 = LIMIT_COORD(block_x + 1, block_width, p_tiled);
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blk_yp1 = LIMIT_COORD(blk_y + 1, block_height, p_tiled);
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p_blocks[0][0] = p_comp_img + twiddle_uv(block_height, block_width, blk_y, block_x);
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p_blocks[0][1] = p_comp_img + twiddle_uv(block_height, block_width, blk_y, block_xp1);
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p_blocks[1][0] = p_comp_img + twiddle_uv(block_height, block_width, blk_yp1, block_x);
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p_blocks[1][1] = p_comp_img + twiddle_uv(block_height, block_width, blk_yp1, block_xp1);
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if (memcmp(prev, p_blocks, 4 * sizeof(void *)) != 0) {
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p_y = 0;
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for (i = 0; i < 2; i++) {
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p_x = 0;
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for (j = 0; j < 2; j++) {
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unpack_5554(p_blocks[i][j], colors5554[i][j].Reps);
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unpack_modulations(
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p_blocks[i][j],
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p_2bit,
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p_modulation,
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p_modulation_modes,
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p_x, p_y);
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p_x += x_block_size;
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}
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p_y += BLK_Y_SIZE;
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}
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memcpy(prev, p_blocks, 4 * sizeof(void *));
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}
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interpolate_colors(
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colors5554[0][0].Reps[0],
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colors5554[0][1].Reps[0],
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colors5554[1][0].Reps[0],
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colors5554[1][1].Reps[0],
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p_2bit, x, y,
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ASig);
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interpolate_colors(
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colors5554[0][0].Reps[1],
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colors5554[0][1].Reps[1],
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colors5554[1][0].Reps[1],
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colors5554[1][1].Reps[1],
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p_2bit, x, y,
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BSig);
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get_modulation_value(x, y, p_2bit, (const int(*)[16])p_modulation, (const int(*)[16])p_modulation_modes,
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&Mod, &DoPT);
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for (i = 0; i < 4; i++) {
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r_result[i] = ASig[i] * 8 + Mod * (BSig[i] - ASig[i]);
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r_result[i] >>= 3;
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}
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if (DoPT)
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r_result[3] = 0;
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u_pos = (x + y * p_width) << 2;
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p_dst[u_pos + 0] = (uint8_t)r_result[0];
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p_dst[u_pos + 1] = (uint8_t)r_result[1];
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p_dst[u_pos + 2] = (uint8_t)r_result[2];
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p_dst[u_pos + 3] = (uint8_t)r_result[3];
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}
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}
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}
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static void _pvrtc_decompress(Image *p_img) {
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ERR_FAIL_COND(p_img->get_format() != Image::FORMAT_PVRTC2 && p_img->get_format() != Image::FORMAT_PVRTC2A && p_img->get_format() != Image::FORMAT_PVRTC4 && p_img->get_format() != Image::FORMAT_PVRTC4A);
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bool _2bit = (p_img->get_format() == Image::FORMAT_PVRTC2 || p_img->get_format() == Image::FORMAT_PVRTC2A);
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PoolVector<uint8_t> data = p_img->get_data();
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PoolVector<uint8_t>::Read r = data.read();
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PoolVector<uint8_t> newdata;
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newdata.resize(p_img->get_width() * p_img->get_height() * 4);
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PoolVector<uint8_t>::Write w = newdata.write();
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decompress_pvrtc((PVRTCBlock *)r.ptr(), _2bit, p_img->get_width(), p_img->get_height(), 0, (unsigned char *)w.ptr());
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w.release();
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r.release();
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bool make_mipmaps = p_img->has_mipmaps();
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p_img->create(p_img->get_width(), p_img->get_height(), false, Image::FORMAT_RGBA8, newdata);
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if (make_mipmaps)
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p_img->generate_mipmaps();
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}
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