example.cpp

// This file is autogenerated. See look at the .lzz files in the src/ directory for a more human-friendly version
// example.hh
//

#ifndef LZZ_example_hh
#define LZZ_example_hh
// SdlStbFont example
// By Liam Twigger - 2020
// Public Domain
#define SDL_STB_FONT_IMPL
#define LZZ_INLINE inline
#undef LZZ_INLINE
#endif

////////////////////////////////////////////////////////////////////////

#ifdef SDL_STB_FONT_IMPL
#ifndef SDL_STB_FONT_IMPL_DOUBLE_GUARD_example
#define SDL_STB_FONT_IMPL_DOUBLE_GUARD_example
// example.cpp
//

#include <string>
#include <SDL2/SDL.h>
#include <iostream>
#include <fstream>

#define SDL_STB_FONT_IMPL
#include "sdlStbFont.h"

/// Opens a file and returns a string of the raw data
void readFileRaw (const std::string & fullPath, std::string & output) {
	std::ifstream fs(fullPath.c_str(), std::ios::in | std::ios::binary);
	
	if (!fs.is_open()) {
		std::cout << "readFileRaw: " << fullPath << " -- " << "WARNING: Could not open file." << std::endl;
		return;
		}
	else {
		std::cout << "Opened! " << fullPath << std::endl;
		}
				
	fs.seekg (0, std::ios::end);
	const size_t LEN = fs.tellg();
	fs.seekg (0, std::ios::beg);
	
	output.resize(LEN);
	fs.read(&output[0], LEN);
	fs.close();
	}

/// Opens a file and stores it in a stb_memory for automatic management
void readFileRaw_toMemory (const std::string & fullPath, sttfont_memory & mem) {
	std::ifstream fs(fullPath.c_str(), std::ios::in | std::ios::binary);
	
	if (!fs.is_open()) {
		std::cout << "readFileRaw: " << fullPath << " -- " << "WARNING: Could not open file." << std::endl;
		return;
		}
	else {
		std::cout << "Opened! " << fullPath << std::endl;
		}
				
	fs.seekg (0, std::ios::end);
	const size_t LEN = fs.tellg();
	fs.seekg (0, std::ios::beg);
	
	mem.alloc(LEN);
	fs.read(mem.data, LEN);
	fs.close();
	}


int main(int argc, char**argv) {
// Sample text from http://www.columbia.edu/~fdc/utf8/index.html
// Notes on example text:
// Certian scripts such as Devanagari or Thai require HarfBuzz to render correctly
// and are therefore not supported
// This does not support HarfBuzz or FriBidi
// 
const std::string loremIpsum = "\"I can eat glass\" sample text:\n\nEuro Symbol: €.\nGreek: Μπορώ να φάω σπασμένα γυαλιά χωρίς να πάθω τίποτα.\nÍslenska / Icelandic: Ég get etið gler án þess að meiða mig.\nPolish: Mogę jeść szkło, i mi nie szkodzi.\nRomanian: Pot să mănânc sticlă și ea nu mă rănește.\nUkrainian: Я можу їсти шкло, й воно мені не пошкодить.\nArmenian: Կրնամ ապակի ուտել և ինծի անհանգիստ չըներ։\nGeorgian: მინას ვჭამ და არა მტკივა.\nHebrew: אני יכול לאכול זכוכית וזה לא מזיק לי.\nArabic: أنا قادر على أكل الزجاج و هذا لا يؤلمني.\nChinese: 我能吞下玻璃而不伤身体。\nChinese (Traditional): 我能吞下玻璃而不傷身體。 \nJapanese: 私はガラスを食べられます。それは私を傷つけません。\nKorean: 률로 정한다. 군사법원의 조직·권한 및 재판관의 자격은 법률로 정한다\nCJK Variants: 判 与 海 直 約 返 次 今 ";

// Formatted text example
// set (test = 5) to see
sttfont_formatted_text formattedText;
formattedText << sttfont_format::black << "Plain text "
	<< sttfont_format::bold << "bold text "
	<< sttfont_format::italic << "italic text\n"
	<< sttfont_format::underline << sttfont_format::green << "underline text\t"
	<< sttfont_format::strikethrough << "strikethrough text\n"
	<< sttfont_format::red << sttfont_format::bold << "red bold\t"
	<< sttfont_format::bold << "not red bold\t"
	<< sttfont_format::red << "red not bold\n"
	<< sttfont_format::bold << sttfont_format::italic			<< sttfont_format::colour(255,127, 50) << "custom colour\t"
	<< sttfont_format::bold << sttfont_format::strikethrough	<< sttfont_format::colour(127,255, 50) << "bold strikethrough\n"
	<< sttfont_format::bold << sttfont_format::underline		<< sttfont_format::colour(  0, 50,200) << "bold underline\t"
	<< sttfont_format::italic << sttfont_format::strikethrough	<< sttfont_format::colour(255,255, 50) << "italic strikethrough\n"
	<< sttfont_format::italic << sttfont_format::underline		<< sttfont_format::colour(127, 50,255) << "italic underline"
	;
	//sttfont_format::colour(255,127,50) 
	sdl_stb_font_cache fc;
	fc.faceSize = 24;
	fc.tabWidthInSpaces = 12;	// Big value to make the effects obvious. For non-monospace fonts a value like this is good
								// You can manually set fc.tabWidth after calling loadFont()
	
	// Ways to load font data:
	// 1. Load a file into some container (such as a std::string)
	//		loadFileRaw("fonts/NotoSans-Regular.ttf, notoSansBuffer);
	//		fc.loadFont(notoSansBuffer.c_str());
	// You'll have to manage the lifetime of notoSansBuffer
	// if notoSansBuffer is destroyed then fc will perform undefined
	// behaviour
	//
	// 2. Load the file into a sttfont_memory and let SdlStbFont manage it
	//		sttfont_memory notoSansMem;
	// 		readFileRaw_toMemory("fonts/NotoSans-Regular.ttf, notoSansMem);
	//		fc.loadFont(notoSansMem);
	//	fc will now own the contents of notoSansMem and you can safely
	//  let it drop out of scope
	//
	
	{
		
		sttfont_memory notoSans;
			sttfont_memory notoSansBold;
			sttfont_memory notoSansItalic;
			sttfont_memory notoSansBoldItalic;
		
		sttfont_memory notoSansArmenian;
		sttfont_memory notoSansGeorgian;
		sttfont_memory notoSansHebrew;
		//sttfont_memory notoSansHindi;
		sttfont_memory notoSansArabic;
		sttfont_memory notoSansCJK;
		
		readFileRaw_toMemory("fonts/NotoSans-Regular.ttf", notoSans);
			readFileRaw_toMemory("fonts/NotoSans-Bold.ttf", notoSansBold);
			readFileRaw_toMemory("fonts/NotoSans-Italic.ttf", notoSansItalic);
			readFileRaw_toMemory("fonts/NotoSans-BoldItalic.ttf", notoSansBoldItalic);
		readFileRaw_toMemory("fonts/NotoSansArmenian-Regular.ttf", notoSansArmenian);
		readFileRaw_toMemory("fonts/NotoSansGeorgian-Regular.ttf", notoSansGeorgian);
		readFileRaw_toMemory("fonts/NotoSansHebrew-Regular.ttf", notoSansHebrew);
		//readFileRaw_toMemory("fonts/NotoSansDevanagari-Regular.ttf", notoSansHindi);
		readFileRaw_toMemory("fonts/NotoSansArabic-Regular.ttf", notoSansArabic);
		readFileRaw_toMemory("fonts/NotoSansCJKjp-Regular.otf", notoSansCJK);
		
		fc.loadFontManaged(notoSans);
			fc.addFormatFontManaged(sttfont_format::FORMAT_BOLD, notoSansBold);
			fc.addFormatFontManaged(sttfont_format::FORMAT_ITALIC, notoSansItalic);
			fc.addFormatFontManaged(sttfont_format::FORMAT_BOLD | sttfont_format::FORMAT_ITALIC, notoSansBoldItalic);
		fc.addFontManaged(notoSansArmenian);
		fc.addFontManaged(notoSansGeorgian);
		fc.addFontManaged(notoSansHebrew);
		//fc.addFontManaged(notoSansHindi);
		fc.addFontManaged(notoSansArabic);
		fc.addFontManaged(notoSansCJK);
	}
	
		
	// Setup the SDL window & renderer
	int windowWidth = 800;
	int windowHeight = 1000;

	SDL_Init(0);
	SDL_Window * mWindow = SDL_CreateWindow("Example Test", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, windowWidth, windowHeight, SDL_WINDOW_SHOWN | SDL_WINDOW_RESIZABLE);
	
	SDL_Renderer * mSdlRenderer = SDL_CreateRenderer(mWindow, SDL_RENDERER_SOFTWARE, 0);
	fc.bindRenderer(mSdlRenderer); // Must bind a renderer before generating any glyphs
	
	// Profiling variables
	uint64_t NOW = SDL_GetPerformanceCounter();
	uint64_t LAST = 0;
	
	// Rendering test
	// Set this to something else to print
	int test = 5;
	
	
	if (test == 1) {
		// Directly rendering text
		for (int i = 0;; ++i) {
			SDL_Event ev;
			while (SDL_PollEvent(&ev)) {
				switch (ev.type) {
					case SDL_QUIT:
						return 1;
						break;
					}
				}
			
			SDL_SetRenderDrawColor(mSdlRenderer, 125, 125, 125, 255); // Grey background to test glyph artefacts
			SDL_RenderClear(mSdlRenderer);
			
			fc.drawText(5, 5, "Direct Rendering Test - " + loremIpsum); // Renders the loremIpsum string and stores the glyphs in textures
   
			SDL_RenderPresent(mSdlRenderer);
			
			if (i % 100 == 0) {
				LAST = NOW;
				NOW = SDL_GetPerformanceCounter();
				const double deltaTime = (double)((NOW - LAST)*1000 / (double)SDL_GetPerformanceFrequency() ) / 100.0;
				std::cout << "Method 1 - 100 Frames Average - Frametime: " << deltaTime << "ms \t FPS: " << (1000.0/deltaTime) << std::endl;
				}
			}
		}
	if (test == 2) {
		// Rendering text to a render target & reusing
		SDL_Texture * RT = NULL;
		int RTw, RTh;
		RT = fc.renderTextToTexture("Render Target Test - " + loremIpsum, &RTw, &RTh); // Renders the loremIpsum string and stores in the texture
			
		for (int i = 0;; ++i) {
			SDL_Event ev;
			while (SDL_PollEvent(&ev)) {
				switch (ev.type) {
					case SDL_QUIT:
						return 1;
						break;
					}
				}
			
			SDL_SetRenderDrawColor(mSdlRenderer, 125, 125, 125, 255);
			SDL_RenderClear(mSdlRenderer);
			
			SDL_Rect r;
			r.x = 5;
			r.y = 5;
			r.w = RTw;
			r.h = RTh;
			SDL_RenderCopy(mSdlRenderer , RT , NULL, &r); 
			
			SDL_RenderPresent(mSdlRenderer);
			
			if (i % 100 == 0) {
				LAST = NOW;
				NOW = SDL_GetPerformanceCounter();
				const double deltaTime = (double)((NOW - LAST)*1000 / (double)SDL_GetPerformanceFrequency() ) / 100.0;
				std::cout << "Method 2 - 100 Frames Average - Frametime: " << deltaTime << "ms \t FPS: " << (1000.0/deltaTime) << std::endl;
				}
			}
			
		// Cleanup
		SDL_DestroyTexture(RT);
		}
	if (test == 3) {
		// Rendering text to a render target wrapped in an object & reusing
		sdl_stb_prerendered_text prt;
		prt.mRenderer = mSdlRenderer;
		fc.renderTextToObject(&prt, "Render Object Test - " + loremIpsum); // Renders the loremIpsum string and stores in the prt object
		
		for (int i = 0;; ++i) {
			SDL_Event ev;
			while (SDL_PollEvent(&ev)) {
				switch (ev.type) {
					case SDL_QUIT:
						return 1;
						break;
					}
				}
			
			SDL_SetRenderDrawColor(mSdlRenderer, 125, 125, 125, 255);
			SDL_RenderClear(mSdlRenderer);
							
			//prt.draw(mSdlRenderer, 5, 5); // Render without colour modification
			prt.drawWithColorMod(5, 5, 255, 185, 80, 255); // Render in orange

			SDL_RenderPresent(mSdlRenderer);
			
			if (i % 100 == 0) {
				LAST = NOW;
				NOW = SDL_GetPerformanceCounter();
				const double deltaTime = (double)((NOW - LAST)*1000 / (double)SDL_GetPerformanceFrequency() ) / 100.0;
				std::cout << "Method 3 - 100 Frames Average - Frametime: " << deltaTime << "ms \t FPS: " << (1000.0/deltaTime) << std::endl;
				}
			}
			
		// Cleanup. The object doesn't have a destructor to prevent accidental destruction of internal texture
		prt.freeTexture();	
		}
	if (test == 4) {
		// Test formatted text - direct printing
		for (int i = 0;; ++i) {
			SDL_Event ev;
			while (SDL_PollEvent(&ev)) {
				switch (ev.type) {
					case SDL_QUIT:
						return 1;
						break;
					}
				}
			
			SDL_SetRenderDrawColor(mSdlRenderer, 125, 125, 125, 255);
			SDL_RenderClear(mSdlRenderer);
			
			fc.drawText(5, 5, formattedText);
			fc.drawText(5, 5 + fc.faceSize * 5, "Normal text after");	// Test that state is not mutated
   
			SDL_RenderPresent(mSdlRenderer);
			
			if (i % 100 == 0) {
				LAST = NOW;
				NOW = SDL_GetPerformanceCounter();
				const double deltaTime = (double)((NOW - LAST)*1000 / (double)SDL_GetPerformanceFrequency() ) / 100.0;
				std::cout << "Method 4 - 100 Frames Average - Frametime: " << deltaTime << "ms \t FPS: " << (1000.0/deltaTime) << std::endl;
				}
			}
		}
	if (test == 5) {
		// Formatted text to render target
		sdl_stb_prerendered_text prt;
		prt.mRenderer = mSdlRenderer;
		fc.renderTextToObject(&prt, formattedText); 
		
		sdl_stb_prerendered_text prt2;
		prt.mRenderer = mSdlRenderer;
		fc.renderTextToObject(&prt2, "Normal text after"); // Render normal text to test that colors/style is not messed up
		
		int numRows = fc.getNumberOfRows(formattedText);
		
		for (int i = 0;; ++i) {
			SDL_Event ev;
			while (SDL_PollEvent(&ev)) {
				switch (ev.type) {
					case SDL_QUIT:
						return 1;
						break;
					}
				}
			
			SDL_SetRenderDrawColor(mSdlRenderer, 125, 125, 125, 255);
			SDL_RenderClear(mSdlRenderer);
			
			prt.draw(5, 5);
			prt2.draw(5, 5 + fc.faceSize * (numRows)); 
			
			SDL_RenderPresent(mSdlRenderer);
			
			if (i % 100 == 0) {
				LAST = NOW;
				NOW = SDL_GetPerformanceCounter();
				const double deltaTime = (double)((NOW - LAST)*1000 / (double)SDL_GetPerformanceFrequency() ) / 100.0;
				std::cout << "Method 5 - 100 Frames Average - Frametime: " << deltaTime << "ms \t FPS: " << (1000.0/deltaTime) << std::endl;
				}
			}
		}
		
	// Cleanup - just let fc fall out of scope
	
	return 1;
	}

#define LZZ_INLINE inline
#undef LZZ_INLINE
#endif //SDL_STB_FONT_IMPL_DOUBLE_GUARD_example
#endif //SDL_STB_FONT_IMPL_IMPL