407 lines
11 KiB
C++
407 lines
11 KiB
C++
/*
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* Copyright 2011-2017 Branimir Karadzic. All rights reserved.
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* License: https://github.com/bkaradzic/bgfx#license-bsd-2-clause
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*/
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#include "entry_p.h"
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#if BX_PLATFORM_EMSCRIPTEN
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#include <emscripten.h>
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#include <emscripten/html5.h>
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extern "C" void entry_emscripten_yield()
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{
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// emscripten_sleep(0);
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}
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namespace entry
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{
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static WindowHandle s_defaultWindow = { 0 };
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static uint8_t s_translateKey[256];
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struct Context
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{
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Context()
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: m_scrollf(0.0f)
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, m_mx(0)
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, m_my(0)
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, m_scroll(0)
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{
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bx::memSet(s_translateKey, 0, sizeof(s_translateKey));
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s_translateKey[27] = Key::Esc;
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s_translateKey[uint8_t('\n')] =
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s_translateKey[uint8_t('\r')] = Key::Return;
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s_translateKey[uint8_t('\t')] = Key::Tab;
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s_translateKey[127] = Key::Backspace;
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s_translateKey[uint8_t(' ')] = Key::Space;
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s_translateKey[38] = Key::Up;
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s_translateKey[40] = Key::Down;
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s_translateKey[37] = Key::Left;
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s_translateKey[39] = Key::Right;
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s_translateKey[uint8_t('+')] =
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s_translateKey[uint8_t('=')] = Key::Plus;
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s_translateKey[uint8_t('_')] =
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s_translateKey[uint8_t('-')] = Key::Minus;
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s_translateKey[uint8_t(':')] =
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s_translateKey[uint8_t(';')] = Key::Semicolon;
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s_translateKey[uint8_t('"')] =
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s_translateKey[uint8_t('\'')] = Key::Quote;
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s_translateKey[uint8_t('{')] =
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s_translateKey[uint8_t('[')] = Key::LeftBracket;
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s_translateKey[uint8_t('}')] =
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s_translateKey[uint8_t(']')] = Key::RightBracket;
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s_translateKey[uint8_t('<')] =
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s_translateKey[uint8_t(',')] = Key::Comma;
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s_translateKey[uint8_t('>')] =
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s_translateKey[uint8_t('.')] = Key::Period;
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s_translateKey[uint8_t('?')] =
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s_translateKey[uint8_t('/')] = Key::Slash;
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s_translateKey[uint8_t('|')] =
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s_translateKey[uint8_t('\\')] = Key::Backslash;
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s_translateKey[uint8_t('~')] =
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s_translateKey[uint8_t('`')] = Key::Tilde;
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s_translateKey[uint8_t('0')] = Key::Key0;
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s_translateKey[uint8_t('1')] = Key::Key1;
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s_translateKey[uint8_t('2')] = Key::Key2;
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s_translateKey[uint8_t('3')] = Key::Key3;
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s_translateKey[uint8_t('4')] = Key::Key4;
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s_translateKey[uint8_t('5')] = Key::Key5;
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s_translateKey[uint8_t('6')] = Key::Key6;
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s_translateKey[uint8_t('7')] = Key::Key7;
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s_translateKey[uint8_t('8')] = Key::Key8;
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s_translateKey[uint8_t('9')] = Key::Key9;
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for (char ch = 'a'; ch <= 'z'; ++ch)
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{
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s_translateKey[uint8_t(ch)] =
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s_translateKey[uint8_t(ch - ' ')] = Key::KeyA + (ch - 'a');
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}
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}
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int32_t run(int _argc, char** _argv)
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{
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emscripten_set_mousedown_callback("#canvas", this, true, mouseCb);
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emscripten_set_mouseup_callback("#canvas", this, true, mouseCb);
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emscripten_set_mousemove_callback("#canvas", this, true, mouseCb);
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emscripten_set_wheel_callback("#canvas", this, true, wheelCb);
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emscripten_set_keypress_callback(NULL, this, true, keyCb);
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emscripten_set_keydown_callback(NULL, this, true, keyCb);
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emscripten_set_keyup_callback(NULL, this, true, keyCb);
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emscripten_set_resize_callback(0, this, true, resizeCb);
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EmscriptenFullscreenStrategy fullscreenStrategy = {};
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fullscreenStrategy.scaleMode = EMSCRIPTEN_FULLSCREEN_SCALE_DEFAULT;
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fullscreenStrategy.canvasResolutionScaleMode = EMSCRIPTEN_FULLSCREEN_CANVAS_SCALE_NONE;
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fullscreenStrategy.filteringMode = EMSCRIPTEN_FULLSCREEN_FILTERING_DEFAULT;
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fullscreenStrategy.canvasResizedCallback = canvasResizeCb;
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fullscreenStrategy.canvasResizedCallbackUserData = this;
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emscripten_request_fullscreen_strategy("#canvas", false, &fullscreenStrategy);
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emscripten_set_focus_callback(NULL, this, true, focusCb);
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emscripten_set_focusin_callback(NULL, this, true, focusCb);
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emscripten_set_focusout_callback(NULL, this, true, focusCb);
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int32_t result = main(_argc, _argv);
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return result;
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}
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static EM_BOOL mouseCb(int eventType, const EmscriptenMouseEvent* event, void* userData);
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static EM_BOOL wheelCb(int eventType, const EmscriptenWheelEvent* event, void* userData);
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static EM_BOOL keyCb(int eventType, const EmscriptenKeyboardEvent* event, void* userData);
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static EM_BOOL resizeCb(int eventType, const EmscriptenUiEvent* event, void* userData);
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static EM_BOOL canvasResizeCb(int eventType, const void* reserved, void* userData);
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static EM_BOOL focusCb(int eventType, const EmscriptenFocusEvent* event, void* userData);
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EventQueue m_eventQueue;
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float m_scrollf;
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int32_t m_mx;
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int32_t m_my;
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int32_t m_scroll;
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};
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static Context s_ctx;
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EM_BOOL Context::mouseCb(int eventType, const EmscriptenMouseEvent* event, void* userData)
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{
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BX_UNUSED(userData);
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if (event)
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{
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switch (eventType)
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{
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case EMSCRIPTEN_EVENT_MOUSEMOVE:
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{
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s_ctx.m_mx = event->canvasX;
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s_ctx.m_my = event->canvasY;
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s_ctx.m_eventQueue.postMouseEvent(s_defaultWindow, s_ctx.m_mx, s_ctx.m_my, s_ctx.m_scroll);
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return true;
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}
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case EMSCRIPTEN_EVENT_MOUSEDOWN:
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case EMSCRIPTEN_EVENT_MOUSEUP:
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case EMSCRIPTEN_EVENT_DBLCLICK:
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{
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s_ctx.m_mx = event->canvasX;
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s_ctx.m_my = event->canvasY;
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MouseButton::Enum mb = (event->button == 2) ? MouseButton::Right : ((event->button == 1) ? MouseButton::Middle : MouseButton::Left);
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s_ctx.m_eventQueue.postMouseEvent(s_defaultWindow, s_ctx.m_mx, s_ctx.m_my, s_ctx.m_scroll, mb, (eventType != EMSCRIPTEN_EVENT_MOUSEUP));
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return true;
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}
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}
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}
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return false;
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}
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EM_BOOL Context::wheelCb(int eventType, const EmscriptenWheelEvent* event, void* userData)
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{
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BX_UNUSED(userData);
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if (event)
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{
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switch (eventType)
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{
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case EMSCRIPTEN_EVENT_WHEEL:
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{
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s_ctx.m_scrollf += event->deltaY;
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s_ctx.m_scroll = (int32_t)s_ctx.m_scrollf;
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s_ctx.m_eventQueue.postMouseEvent(s_defaultWindow, s_ctx.m_mx, s_ctx.m_my, s_ctx.m_scroll);
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return true;
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}
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}
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}
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return false;
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}
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uint8_t translateModifiers(const EmscriptenKeyboardEvent* event)
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{
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uint8_t mask = 0;
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if (event->shiftKey)
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mask |= Modifier::LeftShift | Modifier::RightShift;
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if (event->altKey)
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mask |= Modifier::LeftAlt | Modifier::RightAlt;
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if (event->ctrlKey)
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mask |= Modifier::LeftCtrl | Modifier::RightCtrl;
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if (event->metaKey)
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mask |= Modifier::LeftMeta | Modifier::RightMeta;
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return mask;
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}
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Key::Enum handleKeyEvent(const EmscriptenKeyboardEvent* event, uint8_t* specialKeys, uint8_t* _pressedChar)
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{
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*_pressedChar = (uint8_t)event->keyCode;
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int keyCode = (int)event->keyCode;
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*specialKeys = translateModifiers(event);
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if (event->charCode == 0)
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{
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switch (keyCode)
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{
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case 112: return Key::F1;
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case 113: return Key::F2;
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case 114: return Key::F3;
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case 115: return Key::F4;
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case 116: return Key::F5;
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case 117: return Key::F6;
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case 118: return Key::F7;
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case 119: return Key::F8;
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case 120: return Key::F9;
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case 121: return Key::F10;
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case 122: return Key::F11;
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case 123: return Key::F12;
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case 37: return Key::Left;
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case 39: return Key::Right;
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case 38: return Key::Up;
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case 40: return Key::Down;
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}
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}
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// if this is a unhandled key just return None
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if (keyCode < 256)
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{
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return (Key::Enum)s_translateKey[keyCode];
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}
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return Key::None;
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}
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EM_BOOL Context::keyCb(int eventType, const EmscriptenKeyboardEvent *event, void *userData)
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{
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BX_UNUSED(userData);
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if (event)
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{
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uint8_t modifiers = 0;
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uint8_t pressedChar[4];
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Key::Enum key = handleKeyEvent(event, &modifiers, &pressedChar[0]);
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// Returning true means that we take care of the key (instead of the default behavior)
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if (key != Key::None)
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{
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switch (eventType)
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{
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case EMSCRIPTEN_EVENT_KEYPRESS:
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case EMSCRIPTEN_EVENT_KEYDOWN:
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{
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if (key == Key::KeyQ && (modifiers & Modifier::RightMeta) )
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{
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s_ctx.m_eventQueue.postExitEvent();
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}
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else
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{
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enum { ShiftMask = Modifier::LeftShift|Modifier::RightShift };
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s_ctx.m_eventQueue.postCharEvent(s_defaultWindow, 1, pressedChar);
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s_ctx.m_eventQueue.postKeyEvent(s_defaultWindow, key, modifiers, true);
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return true;
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}
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break;
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}
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case EMSCRIPTEN_EVENT_KEYUP:
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{
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s_ctx.m_eventQueue.postKeyEvent(s_defaultWindow, key, modifiers, false);
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return true;
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}
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}
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}
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}
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return false;
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}
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EM_BOOL Context::resizeCb(int eventType, const EmscriptenUiEvent* event, void* userData)
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{
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BX_UNUSED(eventType, event, userData);
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return false;
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}
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EM_BOOL Context::canvasResizeCb(int eventType, const void* reserved, void* userData)
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{
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BX_UNUSED(eventType, reserved, userData);
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return false;
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}
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EM_BOOL Context::focusCb(int eventType, const EmscriptenFocusEvent* event, void* userData)
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{
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printf("focusCb %d", eventType);
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BX_UNUSED(event, userData);
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if (event)
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{
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switch (eventType)
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{
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case EMSCRIPTEN_EVENT_BLUR:
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{
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s_ctx.m_eventQueue.postSuspendEvent(s_defaultWindow, Suspend::DidSuspend);
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return true;
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}
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case EMSCRIPTEN_EVENT_FOCUS:
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{
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s_ctx.m_eventQueue.postSuspendEvent(s_defaultWindow, Suspend::DidResume);
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return true;
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}
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case EMSCRIPTEN_EVENT_FOCUSIN:
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{
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s_ctx.m_eventQueue.postSuspendEvent(s_defaultWindow, Suspend::WillResume);
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return true;
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}
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case EMSCRIPTEN_EVENT_FOCUSOUT:
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{
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s_ctx.m_eventQueue.postSuspendEvent(s_defaultWindow, Suspend::WillSuspend);
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return true;
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}
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}
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}
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return false;
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}
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const Event* poll()
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{
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entry_emscripten_yield();
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return s_ctx.m_eventQueue.poll();
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}
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const Event* poll(WindowHandle _handle)
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{
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entry_emscripten_yield();
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return s_ctx.m_eventQueue.poll(_handle);
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}
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void release(const Event* _event)
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{
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s_ctx.m_eventQueue.release(_event);
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}
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WindowHandle createWindow(int32_t _x, int32_t _y, uint32_t _width, uint32_t _height, uint32_t _flags, const char* _title)
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{
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BX_UNUSED(_x, _y, _width, _height, _flags, _title);
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WindowHandle handle = { UINT16_MAX };
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return handle;
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}
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void destroyWindow(WindowHandle _handle)
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{
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BX_UNUSED(_handle);
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}
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void setWindowPos(WindowHandle _handle, int32_t _x, int32_t _y)
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{
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BX_UNUSED(_handle, _x, _y);
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}
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void setWindowSize(WindowHandle _handle, uint32_t _width, uint32_t _height)
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{
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BX_UNUSED(_handle, _width, _height);
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}
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void setWindowTitle(WindowHandle _handle, const char* _title)
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{
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BX_UNUSED(_handle, _title);
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}
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void toggleWindowFrame(WindowHandle _handle)
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{
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BX_UNUSED(_handle);
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}
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void toggleFullscreen(WindowHandle _handle)
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{
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BX_UNUSED(_handle);
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}
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void setMouseLock(WindowHandle _handle, bool _lock)
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{
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BX_UNUSED(_handle, _lock);
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}
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}
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int main(int _argc, char** _argv)
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{
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using namespace entry;
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return s_ctx.run(_argc, _argv);
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}
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#endif // BX_PLATFORM_EMSCRIPTEN
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