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https://github.com/brunoherbelin/vimix.git
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Complete refactoring
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brunoherbelin
228
Resource.cpp
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228
Resource.cpp
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#include "defines.h"
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#include "Resource.h"
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#include "Log.h"
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#include <fstream>
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#include <sstream>
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#include <iostream>
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#include <cstring>
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// Desktop OpenGL function loader
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#include <glad/glad.h>
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// multiplatform message box
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#include <tinyfiledialogs.h>
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// standalone image loader
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#include "stb_image.h"
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// CMake Ressource Compiler
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#include <cmrc/cmrc.hpp>
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CMRC_DECLARE(vmix);
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std::map<std::string, unsigned int> textureIndex;
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const char *Resource::getData(const std::string& path, size_t* out_file_size){
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auto fs = cmrc::vmix::get_filesystem();
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cmrc::file file;
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const char* data = nullptr;
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*out_file_size = 0;
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try {
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file = fs.open(path.c_str());
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const auto rc_size = std::distance(file.begin(), file.end());
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*out_file_size = rc_size;
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cmrc::file::iterator it = file.begin();
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data = static_cast<const char *>(it);
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}
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catch (std::system_error e) {
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std::string msg = "Could not access ressource " + std::string(path);
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tinyfd_messageBox(APP_TITLE, msg.c_str(), "ok", "error", 0);
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}
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return data;
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}
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std::string Resource::getText(const std::string& path){
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auto fs = cmrc::vmix::get_filesystem();
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cmrc::file file;
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std::stringstream file_stream;
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try {
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file = fs.open(path.c_str());
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file_stream << std::string(file.begin(), file.end()) << std::endl;
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}
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catch (std::system_error e) {
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std::string msg = "Could not access ressource " + std::string(path);
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tinyfd_messageBox(APP_TITLE, msg.c_str(), "ok", "error", 0);
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}
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return file_stream.str();
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}
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#define FOURCC_DXT1 0x31545844 // Equivalent to "DXT1" in ASCII
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#define FOURCC_DXT3 0x33545844 // Equivalent to "DXT3" in ASCII
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#define FOURCC_DXT5 0x35545844 // Equivalent to "DXT5" in ASCII
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unsigned int Resource::getTextureDDS(const std::string& path)
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{
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GLuint textureID = 0;
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if (textureIndex.count(path) > 0)
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return textureIndex[path];
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// Get the pointer
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size_t size = 0;
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const char *fp = getData(path, &size);
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if ( size==0 ){
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std::string msg = "Empty ressource " + std::string(path);
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tinyfd_messageBox(APP_TITLE, msg.c_str(), "ok", "error", 0);
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return 0;
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}
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// verify the type of file = bytes [0 - 3]
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const char *filecode = fp;
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if (strncmp(filecode, "DDS ", 4) != 0){
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std::string msg = "Not a DDS image " + std::string(path);
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tinyfd_messageBox(APP_TITLE, msg.c_str(), "ok", "error", 0);
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return 0;
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}
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// get the surface desc = bytes [4 - 127]
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const char *header = fp + 4;
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unsigned int height = *(unsigned int*)&(header[8 ]);
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unsigned int width = *(unsigned int*)&(header[12]);
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unsigned int linearSize = *(unsigned int*)&(header[16]);
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unsigned int mipMapCount = *(unsigned int*)&(header[24]);
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unsigned int fourCC = *(unsigned int*)&(header[80]);
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// how big is it going to be including all mipmaps?
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unsigned int bufsize;
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bufsize = mipMapCount > 1 ? linearSize * 2 : linearSize;
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// get the buffer = bytes [128 - ]
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const char *buffer = fp + 128;
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unsigned int components = (fourCC == FOURCC_DXT1) ? 3 : 4;
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unsigned int format;
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switch(fourCC)
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{
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case FOURCC_DXT1:
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format = GL_COMPRESSED_RGBA_S3TC_DXT1_EXT;
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break;
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case FOURCC_DXT3:
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format = GL_COMPRESSED_RGBA_S3TC_DXT3_EXT;
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break;
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case FOURCC_DXT5:
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format = GL_COMPRESSED_RGBA_S3TC_DXT5_EXT;
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break;
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default:
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{
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std::string msg = "Not a DXT1, DXT3 or DXT5 texture " + std::string(path);
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tinyfd_messageBox(APP_TITLE, msg.c_str(), "ok", "error", 0);
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return 0;
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}
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}
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// Create one OpenGL texture
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glGenTextures(1, &textureID);
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// Bind the newly created texture
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glBindTexture(GL_TEXTURE_2D, textureID);
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glPixelStorei(GL_UNPACK_ALIGNMENT,1);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
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unsigned int blockSize = (format == GL_COMPRESSED_RGBA_S3TC_DXT1_EXT) ? 8 : 16;
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unsigned int offset = 0;
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// load the mipmaps
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for (unsigned int level = 0; level < mipMapCount && (width || height); ++level)
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{
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unsigned int size = ((width+3)/4)*((height+3)/4)*blockSize;
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glCompressedTexImage2D(GL_TEXTURE_2D, level, format, width, height,
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0, size, buffer + offset);
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glGenerateMipmap(GL_TEXTURE_2D);
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offset += size;
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width /= 2;
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height /= 2;
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// Deal with Non-Power-Of-Two textures.
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if(width < 1) width = 1;
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if(height < 1) height = 1;
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}
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textureIndex[path] = textureID;
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return textureID;
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}
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unsigned int Resource::getTextureImage(const std::string& path)
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{
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GLuint textureID = 0;
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if (textureIndex.count(path) > 0)
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return textureIndex[path];
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int w, h, n;
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unsigned char* img;
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// Get the pointer
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size_t size = 0;
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const char *fp = getData(path, &size);
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if ( size==0 ){
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std::string msg = "Empty ressource " + std::string(path);
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tinyfd_messageBox(APP_TITLE, msg.c_str(), "ok", "error", 0);
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return 0;
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}
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img = stbi_load_from_memory(reinterpret_cast<const unsigned char *>(fp), size, &w, &h, &n, 4);
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if (img == NULL) {
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std::string msg = "Failed to load " + std::string(path) + " : " + std::string(stbi_failure_reason());
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tinyfd_messageBox(APP_TITLE, msg.c_str(), "ok", "error", 0);
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return 0;
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}
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glGenTextures(1, &textureID);
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glBindTexture( GL_TEXTURE_2D, textureID);
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glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
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//glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
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glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, w, h, 0, GL_RGBA, GL_UNSIGNED_BYTE, img);
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stbi_image_free(img);
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textureIndex[path] = textureID;
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return textureID;
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}
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std::string Resource::listDirectory()
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{
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// enter icons directory
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auto fs = cmrc::vmix::get_filesystem();
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cmrc::file file;
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cmrc::directory_iterator it = fs.iterate_directory("");
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cmrc::directory_iterator itend = it.end();
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std::string ls;
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// loop over all icons
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while(it != itend){
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cmrc::directory_entry file = *it;
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if (file.is_file()) {
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ls += file.filename() + ", ";
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}
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it++;
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}
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return ls;
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}
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