bgfx/examples/10-font/font.cpp

211 lines
7 KiB
C++

#include <bgfx.h>
#include <bx/bx.h>
#include <bx/timer.h>
#include "../common/entry.h"
#include "../common/dbg.h"
#include "../common/math.h"
#include "../common/processevents.h"
#include "../common/font/font_manager.h"
#include "../common/font/text_buffer_manager.h"
#include <stdio.h>
#include <string.h>
static const char* s_shaderPath = NULL;
int _main_(int /*_argc*/, char** /*_argv*/)
{
uint32_t width = 1280;
uint32_t height = 720;
uint32_t debug = BGFX_DEBUG_TEXT;
uint32_t reset = 0;
bgfx::init();
bgfx::reset(width, height);
// 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
);
// Setup root path for binary shaders. Shader binaries are different
// for each renderer.
switch (bgfx::getRendererType() )
{
default:
case bgfx::RendererType::Direct3D9:
s_shaderPath = "shaders/dx9/";
break;
case bgfx::RendererType::Direct3D11:
s_shaderPath = "shaders/dx11/";
break;
case bgfx::RendererType::OpenGL:
s_shaderPath = "shaders/glsl/";
break;
case bgfx::RendererType::OpenGLES2:
case bgfx::RendererType::OpenGLES3:
s_shaderPath = "shaders/gles/";
break;
}
//init the text rendering system
bgfx_font::FontManager* fontManager = new bgfx_font::FontManager(512);
bgfx_font::TextBufferManager* textBufferManager = new bgfx_font::TextBufferManager(fontManager);
textBufferManager->init(s_shaderPath);
//load some truetype files
bgfx_font::TrueTypeHandle times_tt = fontManager->loadTrueTypeFromFile("c:/windows/fonts/times.ttf");
bgfx_font::TrueTypeHandle consola_tt = fontManager->loadTrueTypeFromFile("c:/windows/fonts/consola.ttf");
//create some usable font with of a specific size
bgfx_font::FontHandle times_24 = fontManager->createFontByPixelSize(times_tt, 0, 24);
//preload glyphs and blit them to atlas
fontManager->preloadGlyph(times_24, 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->unloadTrueType(times_tt);
//this font doesn't have any preloaded glyph's but the truetype file is loaded
//so glyph will be generated as needed
bgfx_font::FontHandle consola_16 = fontManager->createFontByPixelSize(consola_tt, 0, 16);
//create a static text buffer compatible with alpha font
//a static text buffer content cannot be modified after its first submit.
bgfx_font::TextBufferHandle staticText = textBufferManager->createTextBuffer(bgfx_font::FONT_TYPE_ALPHA, bgfx_font::STATIC);
//the pen position represent the top left of the box of the first line of text
textBufferManager->setPenPosition(staticText, 20.0f, 100.0f);
//add some text to the buffer
textBufferManager->appendText(staticText, times_24, L"The quick brown fox jumps over the lazy dog\n");
//the position of the pen is adjusted when there is an endline
//setup style colors
textBufferManager->setBackgroundColor(staticText, 0x551111FF);
textBufferManager->setUnderlineColor(staticText, 0xFF2222FF);
textBufferManager->setOverlineColor(staticText, 0x2222FFFF);
textBufferManager->setStrikeThroughColor(staticText, 0x22FF22FF);
//text + bkg
textBufferManager->setStyle(staticText, bgfx_font::STYLE_BACKGROUND);
textBufferManager->appendText(staticText, times_24, L"The quick brown fox jumps over the lazy dog\n");
//text + strike-through
textBufferManager->setStyle(staticText, bgfx_font::STYLE_STRIKE_THROUGH);
textBufferManager->appendText(staticText, times_24, L"The quick brown fox jumps over the lazy dog\n");
//text + overline
textBufferManager->setStyle(staticText, bgfx_font::STYLE_OVERLINE);
textBufferManager->appendText(staticText, times_24, L"The quick brown fox jumps over the lazy dog\n");
//text + underline
textBufferManager->setStyle(staticText, bgfx_font::STYLE_UNDERLINE);
textBufferManager->appendText(staticText, times_24, L"The quick brown fox jumps over the lazy dog\n");
//text + bkg + strike-through
textBufferManager->setStyle(staticText, bgfx_font::STYLE_BACKGROUND|bgfx_font::STYLE_STRIKE_THROUGH);
textBufferManager->appendText(staticText, times_24, L"The quick brown fox jumps over the lazy dog\n");
//create a transient buffer for realtime data
bgfx_font::TextBufferHandle transientText = textBufferManager->createTextBuffer(bgfx_font::FONT_TYPE_ALPHA, bgfx_font::TRANSIENT);
uint32_t w = 0,h = 0;
while (!processEvents(width, height, debug, reset) )
{
if(w!=width|| h!=height)
{
w=width;
h= height;
printf("ri: %d,%d\n",width,height);
}
// Set view 0 default viewport.
bgfx::setViewRect(0, 0, 0, width, height);
// This dummy draw call is here to make sure that view 0 is cleared
// if no other draw calls are submitted to view 0.
bgfx::submit(0);
int64_t now = bx::getHPCounter();
static int64_t last = now;
const int64_t frameTime = now - last;
last = now;
const double freq = double(bx::getHPFrequency() );
const double toMs = 1000.0/freq;
// Use debug font to print information about this example.
//bgfx::dbgTextClear();
//bgfx::dbgTextPrintf(0, 1, 0x4f, "bgfx/examples/10-font");
//bgfx::dbgTextPrintf(0, 2, 0x6f, "Description: Use the font system to display text and styled text.");
//bgfx::dbgTextPrintf(0, 3, 0x0f, "Frame: % 7.3f[ms]", double(frameTime)*toMs);
//Use transient text to display debug information
//Code below is similar to commented code above
wchar_t fpsText[64];
swprintf(fpsText,L"Frame: % 7.3f[ms]", double(frameTime)*toMs);
textBufferManager->clearTextBuffer(transientText);
textBufferManager->setPenPosition(transientText, 20.0, 4.0f);
textBufferManager->appendText(transientText, consola_16, L"bgfx/examples/10-font\n");
textBufferManager->appendText(transientText, consola_16, L"Description: Use the font system to display text and styled text.\n");
textBufferManager->appendText(transientText, consola_16, fpsText);
float at[3] = { 0, 0, 0.0f };
float eye[3] = {0, 0, -1.0f };
float view[16];
float proj[16];
mtxLookAt(view, eye, at);
//setup a top-left ortho matrix for screen space drawing
float centering = 0.5f;
mtxOrtho(proj, centering, width+centering,height+centering, centering,-1.0f, 1.0f);
// Set view and projection matrix for view 0.
bgfx::setViewTransform(0, view, proj);
//submit the debug text
textBufferManager->submitTextBuffer(transientText, 0);
//submit the static text
textBufferManager->submitTextBuffer(staticText, 0);
// Advance to next frame. Rendering thread will be kicked to
// process submitted rendering primitives.
bgfx::frame();
//just to prevent my CG Fan to howl
Sleep(2);
}
fontManager->unloadTrueType(consola_tt);
fontManager->destroyFont(consola_16);
fontManager->destroyFont(times_24);
textBufferManager->destroyTextBuffer(staticText);
textBufferManager->destroyTextBuffer(transientText);
delete textBufferManager;
delete fontManager;
// Shutdown bgfx.
bgfx::shutdown();
return 0;
}