mirror of https://github.com/bkaradzic/bgfx
11-fontsdf to entry::AppI (#1155)
This commit is contained in:
attilaz
Branimir Karadžić
parent
60fbe0a863
commit
f560bcfd55
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@ -31,223 +31,270 @@ TrueTypeHandle loadTtf(FontManager* _fm, const char* _filePath)
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return invalid;
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}
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int _main_(int _argc, char** _argv)
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class ExampleFontSDF : public entry::AppI
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{
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Args args(_argc, _argv);
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uint32_t width = 1280;
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uint32_t height = 720;
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uint32_t debug = BGFX_DEBUG_TEXT;
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uint32_t reset = BGFX_RESET_VSYNC;
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bgfx::init(args.m_type, args.m_pciId);
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bgfx::reset(width, height, reset);
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// Enable debug text.
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bgfx::setDebug(debug);
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// Set view 0 clear state.
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bgfx::setViewClear(0
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, BGFX_CLEAR_COLOR | BGFX_CLEAR_DEPTH
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, 0x303030ff
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, 1.0f
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, 0
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);
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// Imgui.
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imguiCreate();
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char* bigText = (char*)load("text/sherlock_holmes_a_scandal_in_bohemia_arthur_conan_doyle.txt");
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// Init the text rendering system.
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FontManager* fontManager = new FontManager(512);
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TextBufferManager* textBufferManager = new TextBufferManager(fontManager);
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TrueTypeHandle font = loadTtf(fontManager, "font/special_elite.ttf");
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// Create a distance field font.
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FontHandle fontSdf = fontManager->createFontByPixelSize(font, 0, 48, FONT_TYPE_DISTANCE);
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// Create a scaled down version of the same font (without adding anything to the atlas).
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FontHandle fontScaled = fontManager->createScaledFontToPixelSize(fontSdf, 14);
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TextLineMetrics metrics(fontManager->getFontInfo(fontScaled) );
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uint32_t lineCount = metrics.getLineCount(bigText);
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float visibleLineCount = 20.0f;
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const char* textBegin = 0;
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const char* textEnd = 0;
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metrics.getSubText(bigText, 0, (uint32_t)visibleLineCount, textBegin, textEnd);
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TextBufferHandle scrollableBuffer = textBufferManager->createTextBuffer(FONT_TYPE_DISTANCE, BufferType::Transient);
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textBufferManager->setTextColor(scrollableBuffer, 0xFFFFFFFF);
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textBufferManager->appendText(scrollableBuffer, fontScaled, textBegin, textEnd);
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entry::MouseState mouseState;
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int32_t scrollArea = 0;
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const int32_t guiPanelWidth = 250;
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const int32_t guiPanelHeight = 200;
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float textScroll = 0.0f;
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float textRotation = 0.0f;
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float textScale = 1.0f;
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float textSize = 14.0f;
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while (!entry::processEvents(width, height, debug, reset, &mouseState) )
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void init(int _argc, char** _argv) BX_OVERRIDE
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{
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imguiBeginFrame(mouseState.m_mx
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, mouseState.m_my
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, (mouseState.m_buttons[entry::MouseButton::Left ] ? IMGUI_MBUT_LEFT : 0)
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| (mouseState.m_buttons[entry::MouseButton::Right ] ? IMGUI_MBUT_RIGHT : 0)
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| (mouseState.m_buttons[entry::MouseButton::Middle] ? IMGUI_MBUT_MIDDLE : 0)
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, mouseState.m_mz
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, uint16_t(width)
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, uint16_t(height)
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);
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imguiBeginScrollArea("Text Area"
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, width - guiPanelWidth - 10
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, 10
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, guiPanelWidth
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, guiPanelHeight
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, &scrollArea
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);
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imguiSeparatorLine();
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bool recomputeVisibleText = false;
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recomputeVisibleText |= imguiSlider("Number of lines", visibleLineCount, 1.0f, 177.0f , 1.0f);
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if (imguiSlider("Font size", textSize, 6.0f, 64.0f , 1.0f) )
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{
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fontManager->destroyFont(fontScaled);
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fontScaled = fontManager->createScaledFontToPixelSize(fontSdf, (uint32_t) textSize);
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metrics = TextLineMetrics(fontManager->getFontInfo(fontScaled) );
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recomputeVisibleText = true;
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}
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recomputeVisibleText |= imguiSlider("Scroll", textScroll, 0.0f, (lineCount-visibleLineCount) , 1.0f);
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imguiSlider("Rotate", textRotation, 0.0f, bx::kPi*2.0f , 0.1f);
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recomputeVisibleText |= imguiSlider("Scale", textScale, 0.1f, 10.0f , 0.1f);
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if (recomputeVisibleText)
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{
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textBufferManager->clearTextBuffer(scrollableBuffer);
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metrics.getSubText(bigText,(uint32_t)textScroll, (uint32_t)(textScroll+visibleLineCount), textBegin, textEnd);
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textBufferManager->appendText(scrollableBuffer, fontScaled, textBegin, textEnd);
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}
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imguiEndScrollArea();
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imguiEndFrame();
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// Set view 0 default viewport.
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bgfx::setViewRect(0, 0, 0, uint16_t(width), uint16_t(height) );
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// This dummy draw call is here to make sure that view 0 is cleared
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// if no other draw calls are submitted to view 0.
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bgfx::touch(0);
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int64_t now = bx::getHPCounter();
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static int64_t last = now;
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const int64_t frameTime = now - last;
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last = now;
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const double freq = double(bx::getHPFrequency() );
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const double toMs = 1000.0 / freq;
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// Use debug font to print32_t information about this example.
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bgfx::dbgTextClear();
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bgfx::dbgTextPrintf(0, 1, 0x4f, "bgfx/examples/11-fontsdf");
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bgfx::dbgTextPrintf(0, 2, 0x6f, "Description: Use a single distance field font to render text of various size.");
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bgfx::dbgTextPrintf(0, 3, 0x0f, "Frame: % 7.3f[ms]", double(frameTime) * toMs);
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float at[3] = { 0, 0, 0.0f };
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float eye[3] = {0, 0, -1.0f };
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float view[16];
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bx::mtxLookAt(view, eye, at);
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const float centering = 0.5f;
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// Setup a top-left ortho matrix for screen space drawing.
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const bgfx::HMD* hmd = bgfx::getHMD();
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if (NULL != hmd && 0 != (hmd->flags & BGFX_HMD_RENDERING) )
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{
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float proj[16];
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bx::mtxProj(proj, hmd->eye[0].fov, 0.1f, 100.0f, bgfx::getCaps()->homogeneousDepth);
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static float time = 0.0f;
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time += 0.05f;
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const float dist = 10.0f;
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const float offset0 = -proj[8] + (hmd->eye[0].viewOffset[0] / dist * proj[0]);
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const float offset1 = -proj[8] + (hmd->eye[1].viewOffset[0] / dist * proj[0]);
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float ortho[2][16];
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const float viewOffset = width/4.0f;
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const float viewWidth = width/2.0f;
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bx::mtxOrtho(ortho[0], centering + viewOffset, centering + viewOffset + viewWidth, height + centering, centering, -1.0f, 1.0f, offset0);
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bx::mtxOrtho(ortho[1], centering + viewOffset, centering + viewOffset + viewWidth, height + centering, centering, -1.0f, 1.0f, offset1);
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bgfx::setViewTransform(0, view, ortho[0], BGFX_VIEW_STEREO, ortho[1]);
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bgfx::setViewRect(0, 0, 0, hmd->width, hmd->height);
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}
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else
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{
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float ortho[16];
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bx::mtxOrtho(ortho, centering, width + centering, height + centering, centering, -1.0f, 1.0f);
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bgfx::setViewTransform(0, view, ortho);
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bgfx::setViewRect(0, 0, 0, uint16_t(width), uint16_t(height) );
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}
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//very crude approximation :(
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float textAreaWidth = 0.5f * 66.0f * fontManager->getFontInfo(fontScaled).maxAdvanceWidth;
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float textRotMat[16];
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float textCenterMat[16];
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float textScaleMat[16];
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float screenCenterMat[16];
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bx::mtxRotateZ(textRotMat, textRotation);
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bx::mtxTranslate(textCenterMat, -(textAreaWidth * 0.5f), (-visibleLineCount)*metrics.getLineHeight()*0.5f, 0);
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bx::mtxScale(textScaleMat, textScale, textScale, 1.0f);
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bx::mtxTranslate(screenCenterMat, ( (width) * 0.5f), ( (height) * 0.5f), 0);
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//first translate to text center, then scale, then rotate
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float tmpMat[16];
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bx::mtxMul(tmpMat, textCenterMat, textRotMat);
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float tmpMat2[16];
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bx::mtxMul(tmpMat2, tmpMat, textScaleMat);
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float tmpMat3[16];
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bx::mtxMul(tmpMat3, tmpMat2, screenCenterMat);
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// Set model matrix for rendering.
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bgfx::setTransform(tmpMat3);
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// Draw your text.
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textBufferManager->submitTextBuffer(scrollableBuffer, 0);
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// Advance to next frame. Rendering thread will be kicked to
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// process submitted rendering primitives.
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bgfx::frame();
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Args args(_argc, _argv);
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m_width = 1280;
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m_height = 720;
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m_debug = BGFX_DEBUG_TEXT;
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m_reset = BGFX_RESET_VSYNC;
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bgfx::init(args.m_type, args.m_pciId);
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bgfx::reset(m_width, m_height, m_reset);
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// Enable debug text.
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bgfx::setDebug(m_debug);
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// Set view 0 clear state.
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bgfx::setViewClear(0
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, BGFX_CLEAR_COLOR | BGFX_CLEAR_DEPTH
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, 0x303030ff
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, 1.0f
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, 0
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);
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// Imgui.
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imguiCreate();
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m_bigText = (char*)load("text/sherlock_holmes_a_scandal_in_bohemia_arthur_conan_doyle.txt");
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// Init the text rendering system.
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m_fontManager = new FontManager(512);
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m_textBufferManager = new TextBufferManager(m_fontManager);
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m_font = loadTtf(m_fontManager, "font/special_elite.ttf");
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// Create a distance field font.
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m_fontSdf = m_fontManager->createFontByPixelSize(m_font, 0, 48, FONT_TYPE_DISTANCE);
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// Create a scaled down version of the same font (without adding anything to the atlas).
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m_fontScaled = m_fontManager->createScaledFontToPixelSize(m_fontSdf, 14);
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m_metrics = TextLineMetrics(m_fontManager->getFontInfo(m_fontScaled) );
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m_lineCount = m_metrics.getLineCount(m_bigText);
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m_visibleLineCount = 20.0f;
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m_textBegin = 0;
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m_textEnd = 0;
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m_metrics.getSubText(m_bigText, 0, (uint32_t)m_visibleLineCount, m_textBegin, m_textEnd);
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m_scrollableBuffer = m_textBufferManager->createTextBuffer(FONT_TYPE_DISTANCE, BufferType::Transient);
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m_textBufferManager->setTextColor(m_scrollableBuffer, 0xFFFFFFFF);
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m_textBufferManager->appendText(m_scrollableBuffer, m_fontScaled, m_textBegin, m_textEnd);
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m_scrollArea = 0;
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m_textScroll = 0.0f;
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m_textRotation = 0.0f;
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m_textScale = 1.0f;
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m_textSize = 14.0f;
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}
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virtual int shutdown() BX_OVERRIDE
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{
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imguiDestroy();
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BX_FREE(entry::getAllocator(), m_bigText);
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m_fontManager->destroyTtf(m_font);
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// Destroy the fonts.
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m_fontManager->destroyFont(m_fontSdf);
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m_fontManager->destroyFont(m_fontScaled);
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m_textBufferManager->destroyTextBuffer(m_scrollableBuffer);
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delete m_textBufferManager;
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delete m_fontManager;
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// Shutdown bgfx.
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bgfx::shutdown();
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return 0;
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}
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imguiDestroy();
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bool update() BX_OVERRIDE
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{
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if (!entry::processEvents(m_width, m_height, m_debug, m_reset, &m_mouseState) )
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{
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imguiBeginFrame(m_mouseState.m_mx
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, m_mouseState.m_my
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, (m_mouseState.m_buttons[entry::MouseButton::Left ] ? IMGUI_MBUT_LEFT : 0)
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| (m_mouseState.m_buttons[entry::MouseButton::Right ] ? IMGUI_MBUT_RIGHT : 0)
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| (m_mouseState.m_buttons[entry::MouseButton::Middle] ? IMGUI_MBUT_MIDDLE : 0)
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, m_mouseState.m_mz
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, uint16_t(m_width)
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, uint16_t(m_height)
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);
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const int32_t guiPanelWidth = 250;
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const int32_t guiPanelHeight = 200;
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imguiBeginScrollArea("Text Area"
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, m_width - guiPanelWidth - 10
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, 10
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, guiPanelWidth
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, guiPanelHeight
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, &m_scrollArea
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);
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imguiSeparatorLine();
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bool recomputeVisibleText = false;
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recomputeVisibleText |= imguiSlider("Number of lines", m_visibleLineCount, 1.0f, 177.0f , 1.0f);
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if (imguiSlider("Font size", m_textSize, 6.0f, 64.0f , 1.0f) )
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{
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m_fontManager->destroyFont(m_fontScaled);
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m_fontScaled = m_fontManager->createScaledFontToPixelSize(m_fontSdf, (uint32_t) m_textSize);
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m_metrics = TextLineMetrics(m_fontManager->getFontInfo(m_fontScaled) );
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recomputeVisibleText = true;
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}
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recomputeVisibleText |= imguiSlider("Scroll", m_textScroll, 0.0f, (m_lineCount-m_visibleLineCount) , 1.0f);
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imguiSlider("Rotate", m_textRotation, 0.0f, bx::kPi*2.0f , 0.1f);
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recomputeVisibleText |= imguiSlider("Scale", m_textScale, 0.1f, 10.0f , 0.1f);
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if (recomputeVisibleText)
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{
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m_textBufferManager->clearTextBuffer(m_scrollableBuffer);
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m_metrics.getSubText(m_bigText,(uint32_t)m_textScroll, (uint32_t)(m_textScroll+m_visibleLineCount), m_textBegin, m_textEnd);
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m_textBufferManager->appendText(m_scrollableBuffer, m_fontScaled, m_textBegin, m_textEnd);
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}
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imguiEndScrollArea();
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imguiEndFrame();
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// Set view 0 default viewport.
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bgfx::setViewRect(0, 0, 0, uint16_t(m_width), uint16_t(m_height) );
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// This dummy draw call is here to make sure that view 0 is cleared
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// if no other draw calls are submitted to view 0.
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bgfx::touch(0);
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int64_t now = bx::getHPCounter();
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static int64_t last = now;
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const int64_t frameTime = now - last;
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last = now;
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const double freq = double(bx::getHPFrequency() );
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const double toMs = 1000.0 / freq;
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// Use debug font to print32_t information about this example.
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bgfx::dbgTextClear();
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bgfx::dbgTextPrintf(0, 1, 0x4f, "bgfx/examples/11-fontsdf");
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bgfx::dbgTextPrintf(0, 2, 0x6f, "Description: Use a single distance field font to render text of various size.");
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bgfx::dbgTextPrintf(0, 3, 0x0f, "Frame: % 7.3f[ms]", double(frameTime) * toMs);
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float at[3] = { 0, 0, 0.0f };
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float eye[3] = {0, 0, -1.0f };
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float view[16];
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bx::mtxLookAt(view, eye, at);
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const float centering = 0.5f;
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// Setup a top-left ortho matrix for screen space drawing.
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const bgfx::HMD* hmd = bgfx::getHMD();
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if (NULL != hmd && 0 != (hmd->flags & BGFX_HMD_RENDERING) )
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{
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float proj[16];
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bx::mtxProj(proj, hmd->eye[0].fov, 0.1f, 100.0f, bgfx::getCaps()->homogeneousDepth);
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static float time = 0.0f;
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time += 0.05f;
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const float dist = 10.0f;
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const float offset0 = -proj[8] + (hmd->eye[0].viewOffset[0] / dist * proj[0]);
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const float offset1 = -proj[8] + (hmd->eye[1].viewOffset[0] / dist * proj[0]);
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float ortho[2][16];
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const float viewOffset = m_width/4.0f;
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const float viewWidth = m_width/2.0f;
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bx::mtxOrtho(ortho[0], centering + viewOffset, centering + viewOffset + viewWidth, m_height + centering, centering, -1.0f, 1.0f, offset0);
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bx::mtxOrtho(ortho[1], centering + viewOffset, centering + viewOffset + viewWidth, m_height + centering, centering, -1.0f, 1.0f, offset1);
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bgfx::setViewTransform(0, view, ortho[0], BGFX_VIEW_STEREO, ortho[1]);
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bgfx::setViewRect(0, 0, 0, hmd->width, hmd->height);
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}
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else
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{
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float ortho[16];
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bx::mtxOrtho(ortho, centering, m_width + centering, m_height + centering, centering, -1.0f, 1.0f);
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bgfx::setViewTransform(0, view, ortho);
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bgfx::setViewRect(0, 0, 0, uint16_t(m_width), uint16_t(m_height) );
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}
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//very crude approximation :(
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float textAreaWidth = 0.5f * 66.0f * m_fontManager->getFontInfo(m_fontScaled).maxAdvanceWidth;
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float textRotMat[16];
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float textCenterMat[16];
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float textScaleMat[16];
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float screenCenterMat[16];
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bx::mtxRotateZ(textRotMat, m_textRotation);
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bx::mtxTranslate(textCenterMat, -(textAreaWidth * 0.5f), (-m_visibleLineCount)*m_metrics.getLineHeight()*0.5f, 0);
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bx::mtxScale(textScaleMat, m_textScale, m_textScale, 1.0f);
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bx::mtxTranslate(screenCenterMat, ( (m_width) * 0.5f), ( (m_height) * 0.5f), 0);
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|
||||
//first translate to text center, then scale, then rotate
|
||||
float tmpMat[16];
|
||||
bx::mtxMul(tmpMat, textCenterMat, textRotMat);
|
||||
|
||||
float tmpMat2[16];
|
||||
bx::mtxMul(tmpMat2, tmpMat, textScaleMat);
|
||||
|
||||
float tmpMat3[16];
|
||||
bx::mtxMul(tmpMat3, tmpMat2, screenCenterMat);
|
||||
|
||||
// Set model matrix for rendering.
|
||||
bgfx::setTransform(tmpMat3);
|
||||
|
||||
// Draw your text.
|
||||
m_textBufferManager->submitTextBuffer(m_scrollableBuffer, 0);
|
||||
|
||||
// Advance to next frame. Rendering thread will be kicked to
|
||||
// process submitted rendering primitives.
|
||||
bgfx::frame();
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
return false;
|
||||
}
|
||||
|
||||
BX_FREE(entry::getAllocator(), bigText);
|
||||
entry::MouseState m_mouseState;
|
||||
uint32_t m_width;
|
||||
uint32_t m_height;
|
||||
uint32_t m_debug;
|
||||
uint32_t m_reset;
|
||||
|
||||
char* m_bigText;
|
||||
|
||||
// Init the text rendering system.
|
||||
FontManager* m_fontManager;
|
||||
TextBufferManager* m_textBufferManager;
|
||||
|
||||
TrueTypeHandle m_font;
|
||||
FontHandle m_fontSdf;
|
||||
FontHandle m_fontScaled;
|
||||
|
||||
TextBufferHandle m_scrollableBuffer;
|
||||
|
||||
TextLineMetrics m_metrics = TextLineMetrics(FontInfo());
|
||||
uint32_t m_lineCount;
|
||||
float m_visibleLineCount;
|
||||
const char* m_textBegin;
|
||||
const char* m_textEnd;
|
||||
|
||||
int32_t m_scrollArea;
|
||||
float m_textScroll;
|
||||
float m_textRotation;
|
||||
float m_textScale;
|
||||
float m_textSize;
|
||||
};
|
||||
|
||||
fontManager->destroyTtf(font);
|
||||
// Destroy the fonts.
|
||||
fontManager->destroyFont(fontSdf);
|
||||
fontManager->destroyFont(fontScaled);
|
||||
|
||||
textBufferManager->destroyTextBuffer(scrollableBuffer);
|
||||
|
||||
delete textBufferManager;
|
||||
delete fontManager;
|
||||
|
||||
// Shutdown bgfx.
|
||||
bgfx::shutdown();
|
||||
|
||||
return 0;
|
||||
}
|
||||
ENTRY_IMPLEMENT_MAIN(ExampleFontSDF);
|
||||
|
|
|
|||
Loading…
Reference in New Issue