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-rw-r--r--3rdparty/bgfx/examples/11-fontsdf/fontsdf.cpp410
1 files changed, 227 insertions, 183 deletions
diff --git a/3rdparty/bgfx/examples/11-fontsdf/fontsdf.cpp b/3rdparty/bgfx/examples/11-fontsdf/fontsdf.cpp
index 01c6bd08bda..aa653c80285 100644
--- a/3rdparty/bgfx/examples/11-fontsdf/fontsdf.cpp
+++ b/3rdparty/bgfx/examples/11-fontsdf/fontsdf.cpp
@@ -8,13 +8,16 @@
#include <bgfx/bgfx.h>
#include <bx/timer.h>
-#include <bx/fpumath.h>
+#include <bx/math.h>
#include "font/font_manager.h"
#include "font/text_metrics.h"
#include "font/text_buffer_manager.h"
#include "imgui/imgui.h"
+namespace
+{
+
TrueTypeHandle loadTtf(FontManager* _fm, const char* _filePath)
{
uint32_t size;
@@ -31,223 +34,264 @@ TrueTypeHandle loadTtf(FontManager* _fm, const char* _filePath)
return invalid;
}
-int _main_(int _argc, char** _argv)
+class ExampleFontSDF : public entry::AppI
{
- 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
- );
-
- // Imgui.
- imguiCreate();
+public:
+ ExampleFontSDF(const char* _name, const char* _description)
+ : entry::AppI(_name, _description)
+ {
+ }
- char* bigText = (char*)load("text/sherlock_holmes_a_scandal_in_bohemia_arthur_conan_doyle.txt");
+ void init(int32_t _argc, const char* const* _argv, uint32_t _width, uint32_t _height) override
+ {
+ Args args(_argc, _argv);
- // Init the text rendering system.
- FontManager* fontManager = new FontManager(512);
- TextBufferManager* textBufferManager = new TextBufferManager(fontManager);
+ m_width = _width;
+ m_height = _height;
+ m_debug = BGFX_DEBUG_NONE;
+ m_reset = BGFX_RESET_VSYNC;
- TrueTypeHandle font = loadTtf(fontManager, "font/special_elite.ttf");
+ bgfx::init(args.m_type, args.m_pciId);
+ bgfx::reset(m_width, m_height, m_reset);
- // Create a distance field font.
- FontHandle fontSdf = fontManager->createFontByPixelSize(font, 0, 48, FONT_TYPE_DISTANCE);
+ // Enable debug text.
+ bgfx::setDebug(m_debug);
- // Create a scaled down version of the same font (without adding anything to the atlas).
- FontHandle fontScaled = fontManager->createScaledFontToPixelSize(fontSdf, 14);
+ // Set view 0 clear state.
+ bgfx::setViewClear(0
+ , BGFX_CLEAR_COLOR | BGFX_CLEAR_DEPTH
+ , 0x303030ff
+ , 1.0f
+ , 0
+ );
- TextLineMetrics metrics(fontManager->getFontInfo(fontScaled) );
- uint32_t lineCount = metrics.getLineCount(bigText);
+ // Imgui.
+ imguiCreate();
- float visibleLineCount = 20.0f;
+ m_bigText = (char*)load("text/sherlock_holmes_a_scandal_in_bohemia_arthur_conan_doyle.txt");
- const char* textBegin = 0;
- const char* textEnd = 0;
- metrics.getSubText(bigText, 0, (uint32_t)visibleLineCount, textBegin, textEnd);
+ // Init the text rendering system.
+ m_fontManager = new FontManager(512);
+ m_textBufferManager = new TextBufferManager(m_fontManager);
- TextBufferHandle scrollableBuffer = textBufferManager->createTextBuffer(FONT_TYPE_DISTANCE, BufferType::Transient);
- textBufferManager->setTextColor(scrollableBuffer, 0xFFFFFFFF);
+ m_font = loadTtf(m_fontManager, "font/special_elite.ttf");
- textBufferManager->appendText(scrollableBuffer, fontScaled, textBegin, textEnd);
+ // Create a distance field font.
+ m_fontSdf = m_fontManager->createFontByPixelSize(m_font, 0, 48, FONT_TYPE_DISTANCE);
- 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;
+ // Create a scaled down version of the same font (without adding anything to the atlas).
+ m_fontScaled = m_fontManager->createScaledFontToPixelSize(m_fontSdf, 14);
- 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_buttons[entry::MouseButton::Middle] ? IMGUI_MBUT_MIDDLE : 0)
- , mouseState.m_mz
- , uint16_t(width)
- , uint16_t(height)
- );
-
- imguiBeginScrollArea("Text Area"
- , width - guiPanelWidth - 10
- , 10
- , guiPanelWidth
- , guiPanelHeight
- , &scrollArea
- );
- imguiSeparatorLine();
+ m_metrics = TextLineMetrics(m_fontManager->getFontInfo(m_fontScaled) );
+ m_lineCount = m_metrics.getLineCount(m_bigText);
- 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;
- }
+ m_visibleLineCount = 20.0f;
- 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);
+ m_textBegin = 0;
+ m_textEnd = 0;
+ m_metrics.getSubText(m_bigText, 0, (uint32_t)m_visibleLineCount, m_textBegin, m_textEnd);
- if (recomputeVisibleText)
- {
- textBufferManager->clearTextBuffer(scrollableBuffer);
- metrics.getSubText(bigText,(uint32_t)textScroll, (uint32_t)(textScroll+visibleLineCount), textBegin, textEnd);
- textBufferManager->appendText(scrollableBuffer, fontScaled, textBegin, textEnd);
- }
+ m_scrollableBuffer = m_textBufferManager->createTextBuffer(FONT_TYPE_DISTANCE, BufferType::Transient);
+ m_textBufferManager->setTextColor(m_scrollableBuffer, 0xFFFFFFFF);
- imguiEndScrollArea();
+ m_textBufferManager->appendText(m_scrollableBuffer, m_fontScaled, m_textBegin, m_textEnd);
- imguiEndFrame();
+ m_textScroll = 0.0f;
+ m_textRotation = 0.0f;
+ m_textScale = 1.0f;
+ m_textSize = 14.0f;
+ }
- // Set view 0 default viewport.
- bgfx::setViewRect(0, 0, 0, uint16_t(width), uint16_t(height) );
+ virtual int shutdown() override
+ {
+ imguiDestroy();
- // 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::touch(0);
+ BX_FREE(entry::getAllocator(), m_bigText);
- 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;
+ m_fontManager->destroyTtf(m_font);
+ // Destroy the fonts.
+ m_fontManager->destroyFont(m_fontSdf);
+ m_fontManager->destroyFont(m_fontScaled);
- // Use debug font to print32_t information about this example.
- bgfx::dbgTextClear();
- bgfx::dbgTextPrintf(0, 1, 0x4f, "bgfx/examples/11-fontsdf");
- bgfx::dbgTextPrintf(0, 2, 0x6f, "Description: Use a single distance field font to render text of various size.");
- bgfx::dbgTextPrintf(0, 3, 0x0f, "Frame: % 7.3f[ms]", double(frameTime) * toMs);
+ m_textBufferManager->destroyTextBuffer(m_scrollableBuffer);
- float at[3] = { 0, 0, 0.0f };
- float eye[3] = {0, 0, -1.0f };
+ delete m_textBufferManager;
+ delete m_fontManager;
- float view[16];
- bx::mtxLookAt(view, eye, at);
+ // Shutdown bgfx.
+ bgfx::shutdown();
- const float centering = 0.5f;
+ return 0;
+ }
- // Setup a top-left ortho matrix for screen space drawing.
- const bgfx::HMD* hmd = bgfx::getHMD();
- if (NULL != hmd && 0 != (hmd->flags & BGFX_HMD_RENDERING) )
- {
- float proj[16];
- bx::mtxProj(proj, hmd->eye[0].fov, 0.1f, 100.0f, bgfx::getCaps()->homogeneousDepth);
-
- static float time = 0.0f;
- time += 0.05f;
-
- const float dist = 10.0f;
- const float offset0 = -proj[8] + (hmd->eye[0].viewOffset[0] / dist * proj[0]);
- const float offset1 = -proj[8] + (hmd->eye[1].viewOffset[0] / dist * proj[0]);
-
- float ortho[2][16];
- const float viewOffset = width/4.0f;
- const float viewWidth = width/2.0f;
- bx::mtxOrtho(ortho[0], centering + viewOffset, centering + viewOffset + viewWidth, height + centering, centering, -1.0f, 1.0f, offset0);
- bx::mtxOrtho(ortho[1], centering + viewOffset, centering + viewOffset + viewWidth, height + centering, centering, -1.0f, 1.0f, offset1);
- bgfx::setViewTransform(0, view, ortho[0], BGFX_VIEW_STEREO, ortho[1]);
- bgfx::setViewRect(0, 0, 0, hmd->width, hmd->height);
- }
- else
+ bool update() override
+ {
+ if (!entry::processEvents(m_width, m_height, m_debug, m_reset, &m_mouseState) )
{
- float ortho[16];
- bx::mtxOrtho(ortho, centering, width + centering, height + centering, centering, -1.0f, 1.0f);
- bgfx::setViewTransform(0, view, ortho);
- bgfx::setViewRect(0, 0, 0, uint16_t(width), uint16_t(height) );
+ imguiBeginFrame(m_mouseState.m_mx
+ , m_mouseState.m_my
+ , (m_mouseState.m_buttons[entry::MouseButton::Left ] ? IMGUI_MBUT_LEFT : 0)
+ | (m_mouseState.m_buttons[entry::MouseButton::Right ] ? IMGUI_MBUT_RIGHT : 0)
+ | (m_mouseState.m_buttons[entry::MouseButton::Middle] ? IMGUI_MBUT_MIDDLE : 0)
+ , m_mouseState.m_mz
+ , uint16_t(m_width)
+ , uint16_t(m_height)
+ );
+
+ showExampleDialog(this);
+
+ ImGui::SetNextWindowPos(
+ ImVec2(m_width - m_width / 5.0f - 10.0f, 10.0f)
+ , ImGuiSetCond_FirstUseEver
+ );
+ ImGui::Begin("Settings"
+ , NULL
+ , ImVec2(m_width / 5.0f, m_height / 2.0f)
+ , ImGuiWindowFlags_AlwaysAutoResize
+ );
+
+ bool recomputeVisibleText = false;
+ recomputeVisibleText |= ImGui::SliderFloat("# of lines", &m_visibleLineCount, 1.0f, 177.0f);
+
+ if (ImGui::SliderFloat("Font size", &m_textSize, 6.0f, 64.0f) )
+ {
+ m_fontManager->destroyFont(m_fontScaled);
+ m_fontScaled = m_fontManager->createScaledFontToPixelSize(m_fontSdf, (uint32_t) m_textSize);
+ m_metrics = TextLineMetrics(m_fontManager->getFontInfo(m_fontScaled) );
+ recomputeVisibleText = true;
+ }
+
+ recomputeVisibleText |= ImGui::SliderFloat("Scroll", &m_textScroll, 0.0f, (m_lineCount-m_visibleLineCount));
+ ImGui::SliderFloat("Rotate", &m_textRotation, 0.0f, bx::kPi*2.0f);
+ recomputeVisibleText |= ImGui::SliderFloat("Scale", &m_textScale, 0.1f, 10.0f);
+
+ if (recomputeVisibleText)
+ {
+ m_textBufferManager->clearTextBuffer(m_scrollableBuffer);
+ m_metrics.getSubText(m_bigText,(uint32_t)m_textScroll, (uint32_t)(m_textScroll+m_visibleLineCount), m_textBegin, m_textEnd);
+ m_textBufferManager->appendText(m_scrollableBuffer, m_fontScaled, m_textBegin, m_textEnd);
+ }
+
+ ImGui::End();
+
+ imguiEndFrame();
+
+ // Set view 0 default viewport.
+ bgfx::setViewRect(0, 0, 0, uint16_t(m_width), uint16_t(m_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::touch(0);
+
+ float at[3] = { 0.0f, 0.0f, 0.0f };
+ float eye[3] = { 0.0f, 0.0f, -1.0f };
+
+ float view[16];
+ bx::mtxLookAt(view, eye, at);
+
+ const float centering = 0.5f;
+
+ // Setup a top-left ortho matrix for screen space drawing.
+ const bgfx::HMD* hmd = bgfx::getHMD();
+ const bgfx::Caps* caps = bgfx::getCaps();
+ if (NULL != hmd
+ && 0 != (hmd->flags & BGFX_HMD_RENDERING) )
+ {
+ float proj[16];
+ bx::mtxProj(proj, hmd->eye[0].fov, 0.1f, 100.0f, caps->homogeneousDepth);
+
+ static float time = 0.0f;
+ time += 0.05f;
+
+ const float dist = 10.0f;
+ const float offset0 = -proj[8] + (hmd->eye[0].viewOffset[0] / dist * proj[0]);
+ const float offset1 = -proj[8] + (hmd->eye[1].viewOffset[0] / dist * proj[0]);
+
+ float ortho[2][16];
+ const float viewOffset = m_width/4.0f;
+ const float viewWidth = m_width/2.0f;
+ bx::mtxOrtho(ortho[0], centering + viewOffset, centering + viewOffset + viewWidth, m_height + centering, centering, -1.0f, 1.0f, offset0, caps->homogeneousDepth);
+ bx::mtxOrtho(ortho[1], centering + viewOffset, centering + viewOffset + viewWidth, m_height + centering, centering, -1.0f, 1.0f, offset1, caps->homogeneousDepth);
+ bgfx::setViewTransform(0, view, ortho[0], BGFX_VIEW_STEREO, ortho[1]);
+ bgfx::setViewRect(0, 0, 0, hmd->width, hmd->height);
+ }
+ else
+ {
+ float ortho[16];
+ bx::mtxOrtho(ortho, centering, m_width + centering, m_height + centering, centering, -1.0f, 1.0f, 0.0f, caps->homogeneousDepth);
+ bgfx::setViewTransform(0, view, ortho);
+ bgfx::setViewRect(0, 0, 0, uint16_t(m_width), uint16_t(m_height) );
+ }
+
+ //very crude approximation :(
+ float textAreaWidth = 0.5f * 66.0f * m_fontManager->getFontInfo(m_fontScaled).maxAdvanceWidth;
+
+ float textRotMat[16];
+ float textCenterMat[16];
+ float textScaleMat[16];
+ float screenCenterMat[16];
+
+ bx::mtxRotateZ(textRotMat, m_textRotation);
+ bx::mtxTranslate(textCenterMat, -(textAreaWidth * 0.5f), (-m_visibleLineCount)*m_metrics.getLineHeight()*0.5f, 0);
+ bx::mtxScale(textScaleMat, m_textScale, m_textScale, 1.0f);
+ bx::mtxTranslate(screenCenterMat, ( (m_width) * 0.5f), ( (m_height) * 0.5f), 0);
+
+ //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;
}
- //very crude approximation :(
- float textAreaWidth = 0.5f * 66.0f * fontManager->getFontInfo(fontScaled).maxAdvanceWidth;
-
- float textRotMat[16];
- float textCenterMat[16];
- float textScaleMat[16];
- float screenCenterMat[16];
-
- bx::mtxRotateZ(textRotMat, textRotation);
- bx::mtxTranslate(textCenterMat, -(textAreaWidth * 0.5f), (-visibleLineCount)*metrics.getLineHeight()*0.5f, 0);
- bx::mtxScale(textScaleMat, textScale, textScale, 1.0f);
- bx::mtxTranslate(screenCenterMat, ( (width) * 0.5f), ( (height) * 0.5f), 0);
-
- //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);
+ return false;
+ }
- // Draw your text.
- textBufferManager->submitTextBuffer(scrollableBuffer, 0);
+ entry::MouseState m_mouseState;
+ uint32_t m_width;
+ uint32_t m_height;
+ uint32_t m_debug;
+ uint32_t m_reset;
- // Advance to next frame. Rendering thread will be kicked to
- // process submitted rendering primitives.
- bgfx::frame();
- }
+ char* m_bigText;
- imguiDestroy();
+ // Init the text rendering system.
+ FontManager* m_fontManager;
+ TextBufferManager* m_textBufferManager;
- BX_FREE(entry::getAllocator(), bigText);
+ TrueTypeHandle m_font;
+ FontHandle m_fontSdf;
+ FontHandle m_fontScaled;
- fontManager->destroyTtf(font);
- // Destroy the fonts.
- fontManager->destroyFont(fontSdf);
- fontManager->destroyFont(fontScaled);
+ TextBufferHandle m_scrollableBuffer;
- textBufferManager->destroyTextBuffer(scrollableBuffer);
+ TextLineMetrics m_metrics = TextLineMetrics(FontInfo());
+ uint32_t m_lineCount;
+ float m_visibleLineCount;
+ const char* m_textBegin;
+ const char* m_textEnd;
- delete textBufferManager;
- delete fontManager;
+ float m_textScroll;
+ float m_textRotation;
+ float m_textScale;
+ float m_textSize;
+};
- // Shutdown bgfx.
- bgfx::shutdown();
+} // namespace
- return 0;
-}
+ENTRY_IMPLEMENT_MAIN(ExampleFontSDF, "11-fontsdf", "Use a single distance field font to render text of various size.");