C++ FontManager::createFontByPixelSize方法代码示例

int _main_(int _argc, char** _argv)
{
	Args args(_argc, _argv);

	uint32_t width = 1280;
	uint32_t height = 720;
	uint32_t debug = BGFX_DEBUG_TEXT;
	uint32_t reset = BGFX_RESET_VSYNC;

	bgfx::init(args.m_type, args.m_pciId);
	bgfx::reset(width, height, reset);

	// Enable debug text.
	bgfx::setDebug(debug);

	// Set view 0 clear state.
	bgfx::setViewClear(0
		, BGFX_CLEAR_COLOR | BGFX_CLEAR_DEPTH
		, 0x303030ff
		, 1.0f
		, 0
		);

	// Init the text rendering system.
	FontManager* fontManager = new FontManager(512);
	TextBufferManager* textBufferManager = new TextBufferManager(fontManager);

	// Load some TTF files.
	const char* fontFilePath[7] =
	{
		"font/droidsans.ttf",
		"font/chp-fire.ttf",
		"font/bleeding_cowboys.ttf",
		"font/mias_scribblings.ttf",
		"font/ruritania.ttf",
		"font/signika-regular.ttf",
		"font/five_minutes.otf",
	};

	const uint32_t numFonts = BX_COUNTOF(fontFilePath);

	TrueTypeHandle fontFiles[numFonts];
	FontHandle fonts[numFonts];
	for (uint32_t ii = 0; ii < numFonts; ++ii)
	{
		// Instantiate a usable font.
		fontFiles[ii] = loadTtf(fontManager, fontFilePath[ii]);
		fonts[ii] = fontManager->createFontByPixelSize(fontFiles[ii], 0, 32);

		// Preload glyphs and blit them to atlas.
		fontManager->preloadGlyph(fonts[ii], L"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ. \n");

		// You can unload the truetype files at this stage, but in that
		// case, the set of glyph's will be limited to the set of preloaded
		// glyph.
		fontManager->destroyTtf(fontFiles[ii]);
	}

	TrueTypeHandle fontAwesomeTtf = loadTtf(fontManager, "font/fontawesome-webfont.ttf");

	// This font doesn't have any preloaded glyph's but the truetype file
	// is loaded so glyph will be generated as needed.
	FontHandle fontAwesome72 = fontManager->createFontByPixelSize(fontAwesomeTtf, 0, 72);

	TrueTypeHandle visitorTtf = loadTtf(fontManager, "font/visitor1.ttf");

	// This font doesn't have any preloaded glyph's but the truetype file
	// is loaded so glyph will be generated as needed.
	FontHandle visitor10 = fontManager->createFontByPixelSize(visitorTtf, 0, 10);

	//create a static text buffer compatible with alpha font
	//a static text buffer content cannot be modified after its first submit.
	TextBufferHandle staticText = textBufferManager->createTextBuffer(FONT_TYPE_ALPHA, BufferType::Static);

	// The pen position represent the top left of the box of the first line
	// of text.
	textBufferManager->setPenPosition(staticText, 24.0f, 100.0f);

	for (uint32_t ii = 0; ii < numFonts; ++ii)
	{
		// Add some text to the buffer.
		// The position of the pen is adjusted when there is an endline.
		textBufferManager->appendText(staticText, fonts[ii], L"The quick brown fox jumps over the lazy dog\n");
	}

	// Now write some styled text.

	// Setup style colors.
	textBufferManager->setBackgroundColor(staticText, 0x551111ff);
	textBufferManager->setUnderlineColor(staticText, 0xff2222ff);
	textBufferManager->setOverlineColor(staticText, 0x2222ffff);
	textBufferManager->setStrikeThroughColor(staticText, 0x22ff22ff);

	// Background.
	textBufferManager->setStyle(staticText, STYLE_BACKGROUND);
	textBufferManager->appendText(staticText, fonts[0], L"The quick ");

	// Strike-through.
	textBufferManager->setStyle(staticText, STYLE_STRIKE_THROUGH);
	textBufferManager->appendText(staticText, fonts[0], L"brown fox ");
//.........这里部分代码省略.........

int _main_(int /*_argc*/, char** /*_argv*/)
{
	uint32_t width = 1280;
	uint32_t height = 720;
	uint32_t debug = BGFX_DEBUG_TEXT;
	uint32_t reset = BGFX_RESET_VSYNC;

	bgfx::init();

	bgfx::reset(width, height, reset);

	// Enable debug text.
	bgfx::setDebug(debug);

	// Set view 0 clear state.
	bgfx::setViewClear(0
		, BGFX_CLEAR_COLOR | BGFX_CLEAR_DEPTH
		, 0x303030ff
		, 1.0f
		, 0
		);

	// Imgui.
	imguiCreate();

	char* bigText = loadText( "text/sherlock_holmes_a_scandal_in_bohemia_arthur_conan_doyle.txt");

	// Init the text rendering system.
	FontManager* fontManager = new FontManager(512);
	TextBufferManager* textBufferManager = new TextBufferManager(fontManager);

	TrueTypeHandle font = loadTtf(fontManager, "font/special_elite.ttf");

	// Create a distance field font.
	FontHandle fontSdf = fontManager->createFontByPixelSize(font, 0, 48, FONT_TYPE_DISTANCE);

	// Create a scaled down version of the same font (without adding anything to the atlas).
	FontHandle fontScaled = fontManager->createScaledFontToPixelSize(fontSdf, 14);

	TextLineMetrics metrics(fontManager->getFontInfo(fontScaled) );
	uint32_t lineCount = metrics.getLineCount(bigText);

	float visibleLineCount = 20.0f;

	const char* textBegin = 0;
	const char* textEnd = 0;
	metrics.getSubText(bigText, 0, (uint32_t)visibleLineCount, textBegin, textEnd);

	TextBufferHandle scrollableBuffer = textBufferManager->createTextBuffer(FONT_TYPE_DISTANCE, BufferType::Transient);
	textBufferManager->setTextColor(scrollableBuffer, 0xFFFFFFFF);

	textBufferManager->appendText(scrollableBuffer, fontScaled, textBegin, textEnd);

	entry::MouseState mouseState;
	int32_t scrollArea = 0;
	const int32_t guiPanelWidth = 250;
	const int32_t guiPanelHeight = 200;
	float textScroll = 0.0f;
	float textRotation = 0.0f;
	float textScale = 1.0f;
	float textSize = 14.0f;

	while (!entry::processEvents(width, height, debug, reset, &mouseState) )
	{
		imguiBeginFrame(mouseState.m_mx
			, mouseState.m_my
			, (mouseState.m_buttons[entry::MouseButton::Left  ] ? IMGUI_MBUT_LEFT  : 0)
			| (mouseState.m_buttons[entry::MouseButton::Right ] ? IMGUI_MBUT_RIGHT : 0)
			, mouseState.m_mz
			, width
			, height
			);

		imguiBeginScrollArea("Text Area"
			, width - guiPanelWidth - 10
			, 10
			, guiPanelWidth
			, guiPanelHeight
			, &scrollArea
			);
		imguiSeparatorLine();

		bool recomputeVisibleText = false;
		recomputeVisibleText |= imguiSlider("Number of lines", visibleLineCount, 1.0f, 177.0f , 1.0f);
		if (imguiSlider("Font size", textSize, 6.0f, 64.0f , 1.0f) )
		{
			fontManager->destroyFont(fontScaled);
			fontScaled = fontManager->createScaledFontToPixelSize(fontSdf, (uint32_t) textSize);
			metrics = TextLineMetrics(fontManager->getFontInfo(fontScaled) );
			recomputeVisibleText = true;
		}

		recomputeVisibleText |= imguiSlider("Scroll", textScroll, 0.0f, (lineCount-visibleLineCount) , 1.0f);
		imguiSlider("Rotate", textRotation, 0.0f, bx::pi*2.0f , 0.1f);
		recomputeVisibleText |= imguiSlider("Scale", textScale, 0.1f, 10.0f , 0.1f);

		if (recomputeVisibleText)
		{
			textBufferManager->clearTextBuffer(scrollableBuffer);
			metrics.getSubText(bigText,(uint32_t)textScroll, (uint32_t)(textScroll+visibleLineCount), textBegin, textEnd);
//.........这里部分代码省略.........

int _main_(int /*_argc*/, char** /*_argv*/)
{
	uint32_t width = 1280;
	uint32_t height = 720;
	uint32_t debug = BGFX_DEBUG_TEXT;
	uint32_t reset = BGFX_RESET_VSYNC;

	bgfx::init();

	bgfx::reset(width, height, reset);

	// Enable debug text.
	bgfx::setDebug(debug);

	// Set view 0 clear state.
	bgfx::setViewClear(0
		, BGFX_CLEAR_COLOR_BIT | BGFX_CLEAR_DEPTH_BIT
		, 0x303030ff
		, 1.0f
		, 0
		);

	// Init the text rendering system.
	FontManager* fontManager = new FontManager(512);
	TextBufferManager* textBufferManager = new TextBufferManager(fontManager);

	// Load some TTF files.
	const char* fontNames[7] =
	{
		"font/droidsans.ttf",
		"font/chp-fire.ttf",
		"font/bleeding_cowboys.ttf",
		"font/mias_scribblings.ttf",
		"font/ruritania.ttf",
		"font/signika-regular.ttf",
		"font/five_minutes.otf"
	};

	const uint32_t fontCount = countof(fontNames);

	TrueTypeHandle fontFiles[fontCount];
	FontHandle fonts[fontCount];
	for (uint32_t ii = 0; ii < fontCount; ++ii)
	{
		// Instantiate a usable font.
		fontFiles[ii] = loadTtf(fontManager, fontNames[ii]);
		fonts[ii] = fontManager->createFontByPixelSize(fontFiles[ii], 0, 32);

		// Preload glyphs and blit them to atlas.
		fontManager->preloadGlyph(fonts[ii], L"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ. \n");

		// You can unload the truetype files at this stage, but in that 
		// case, the set of glyph's will be limited to the set of preloaded 
		// glyph.
		fontManager->destroyTtf(fontFiles[ii]);
	}

	TrueTypeHandle console_tt = loadTtf(fontManager, "font/visitor1.ttf");

	// This font doesn't have any preloaded glyph's but the truetype file 
	// is loaded so glyph will be generated as needed.
	FontHandle consola_16 = fontManager->createFontByPixelSize(console_tt, 0, 10);

	//create a static text buffer compatible with alpha font
	//a static text buffer content cannot be modified after its first submit.
	TextBufferHandle staticText = textBufferManager->createTextBuffer(FONT_TYPE_ALPHA, BufferType::Static);

	// The pen position represent the top left of the box of the first line 
	// of text.
	textBufferManager->setPenPosition(staticText, 24.0f, 100.0f);

	for (uint32_t ii = 0; ii < fontCount; ++ii)
	{
		// Add some text to the buffer.
		// The position of the pen is adjusted when there is an endline.
		textBufferManager->appendText(staticText, fonts[ii], L"The quick brown fox jumps over the lazy dog\n");
	}

	// Now write some styled text.

	// Setup style colors.
	textBufferManager->setBackgroundColor(staticText, 0x551111FF);
	textBufferManager->setUnderlineColor(staticText, 0xFF2222FF);
	textBufferManager->setOverlineColor(staticText, 0x2222FFFF);
	textBufferManager->setStrikeThroughColor(staticText, 0x22FF22FF);

	// Background.
	textBufferManager->setStyle(staticText, STYLE_BACKGROUND);
	textBufferManager->appendText(staticText, fonts[0], L"The quick ");

	// Strike-through.
	textBufferManager->setStyle(staticText, STYLE_STRIKE_THROUGH);
	textBufferManager->appendText(staticText, fonts[0], L"brown fox ");

	// Overline.
	textBufferManager->setStyle(staticText, STYLE_OVERLINE);
	textBufferManager->appendText(staticText, fonts[0], L"jumps over ");

	// Underline.
	textBufferManager->setStyle(staticText, STYLE_UNDERLINE);
//.........这里部分代码省略.........