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annotate semicongine/engine.nim @ 905:a9d71d2c2461

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did: same for panels
author Sam <sam@basx.dev>
date Sat, 24 Feb 2024 15:35:52 +0700
parents a253a691e0d6
children f4bc149a385c
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rev   line source
904
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1 {.experimental: "codeReordering".}
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2
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3 import std/options
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4 import std/logging
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5 import std/os
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6
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7 import ./platform/window
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8
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9 import ./core
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10 import ./vulkan/instance
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11 import ./vulkan/device
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12 import ./vulkan/physicaldevice
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13 import ./vulkan/shader
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14
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15 import ./scene
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16 import ./material
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17 import ./renderer
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18 import ./events
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19 import ./audio
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20 import ./text
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21 import ./panel
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22
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23 type
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24 EngineState* = enum
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25 Starting
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26 Running
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27 Shutdown
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28 Input = object
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29 keyIsDown: set[Key]
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30 keyWasPressed: set[Key]
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31 keyWasReleased: set[Key]
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32 mouseIsDown: set[MouseButton]
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33 mouseWasPressed: set[MouseButton]
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34 mouseWasReleased: set[MouseButton]
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35 mousePosition: Vec2f
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36 mouseMove: Vec2f
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37 eventsProcessed: uint64
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38 windowWasResized: bool
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39 mouseWheel: float32
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40 Engine* = object
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41 state*: EngineState
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42 device: Device
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43 debugger: Debugger
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44 instance: Instance
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45 window: NativeWindow
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46 renderer: Option[Renderer]
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47 input: Input
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48 exitHandler: proc(engine: var Engine)
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49 resizeHandler: proc(engine: var Engine)
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50 eventHandler: proc(engine: var Engine, event: Event)
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51 fullscreen: bool
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52
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53
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54 proc destroy*(engine: var Engine) =
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55 checkVkResult engine.device.vk.vkDeviceWaitIdle()
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56 if engine.renderer.isSome:
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57 engine.renderer.get.destroy()
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58 engine.device.destroy()
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59 if engine.debugger.messenger.valid:
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60 engine.debugger.destroy()
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61 engine.window.destroy()
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62 engine.instance.destroy()
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63
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64
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65 proc initEngine*(
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66 applicationName: string,
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67 debug = DEBUG,
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68 exitHandler: proc(engine: var Engine) = nil,
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69 resizeHandler: proc(engine: var Engine) = nil,
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70 eventHandler: proc(engine: var Engine, event: Event) = nil
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71 ): Engine =
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72 echo "Set log level to ", ENGINE_LOGLEVEL
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73 setLogFilter(ENGINE_LOGLEVEL)
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74
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75 result.state = Starting
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76 result.exitHandler = exitHandler
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77 result.resizeHandler = resizeHandler
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78 result.eventHandler = eventHandler
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79 result.window = createWindow(applicationName)
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80
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81 var
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82 instanceExtensions: seq[string]
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83 enabledLayers: seq[string]
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84
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85 if debug:
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86 instanceExtensions.add "VK_EXT_debug_utils"
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87 enabledLayers.add "VK_LAYER_KHRONOS_validation"
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88 # putEnv("VK_LAYER_ENABLES", "VK_VALIDATION_FEATURE_ENABLE_BEST_PRACTICES_EXT")
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89 putEnv("VK_LAYER_ENABLES", "")
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90
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91 if defined(linux) and DEBUG:
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92 enabledLayers.add "VK_LAYER_MESA_overlay"
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93 result.instance = result.window.createInstance(
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94 vulkanVersion = VK_MAKE_API_VERSION(0, 1, 3, 0),
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95 instanceExtensions = instanceExtensions,
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96 layers = enabledLayers,
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97 )
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98 if debug:
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99 result.debugger = result.instance.createDebugMessenger()
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100 # create devices
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101 let selectedPhysicalDevice = result.instance.getPhysicalDevices().filterBestGraphics()
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102 result.device = result.instance.createDevice(
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103 selectedPhysicalDevice,
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104 enabledLayers = @[],
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105 enabledExtensions = @[],
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106 selectedPhysicalDevice.filterForGraphicsPresentationQueues()
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107 )
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108 startMixerThread()
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109
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110 proc initRenderer*(engine: var Engine, shaders: openArray[(MaterialType, ShaderConfiguration)], clearColor = Vec4f([0.8'f32, 0.8'f32, 0.8'f32, 1'f32]), backFaceCulling = true) =
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111
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112 assert not engine.renderer.isSome
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113 var allShaders = @shaders
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114 allShaders.add (EMPTY_MATERIAL, EMPTY_SHADER)
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115 allShaders.add (PANEL_MATERIAL_TYPE, PANEL_SHADER)
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116 allShaders.add (TEXT_MATERIAL_TYPE, TEXT_SHADER)
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117 engine.renderer = some(engine.device.initRenderer(shaders = allShaders, clearColor = clearColor, backFaceCulling = backFaceCulling))
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118
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119 proc initRenderer*(engine: var Engine, clearColor = Vec4f([0.8'f32, 0.8'f32, 0.8'f32, 1'f32])) =
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120 engine.initRenderer(@[], clearColor)
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121
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122 proc loadScene*(engine: var Engine, scene: var Scene) =
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123 assert engine.renderer.isSome
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124 assert not scene.loaded
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125 scene.addShaderGlobal(ASPECT_RATIO_ATTRIBUTE, engine.getAspectRatio)
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126 engine.renderer.get.setupDrawableBuffers(scene)
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127 engine.renderer.get.updateMeshData(scene, forceAll = true)
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128 engine.renderer.get.updateUniformData(scene, forceAll = true)
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129
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130 proc unloadScene*(engine: var Engine, scene: Scene) =
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131 engine.renderer.get.destroy(scene)
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132
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133 proc renderScene*(engine: var Engine, scene: var Scene) =
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134 assert engine.state == Running
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135 assert engine.renderer.isSome
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136 scene.setShaderGlobal(ASPECT_RATIO_ATTRIBUTE, engine.getAspectRatio)
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137 engine.renderer.get.updateMeshData(scene)
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138 engine.renderer.get.updateUniformData(scene)
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139 engine.renderer.get.render(scene)
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140
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141 proc updateInputs*(engine: var Engine): EngineState =
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142 assert engine.state in [Starting, Running]
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143
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144 # reset input states
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145 engine.input.keyWasPressed = {}
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146 engine.input.keyWasReleased = {}
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147 engine.input.mouseWasPressed = {}
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148 engine.input.mouseWasReleased = {}
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149 engine.input.mouseWheel = 0
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150 engine.input.mouseMove = newVec2f()
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151 engine.input.windowWasResized = false
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152
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153 if engine.state == Starting:
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154 engine.input.windowWasResized = true
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155 var mpos = engine.window.getMousePosition()
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156 if mpos.isSome:
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157 engine.input.mousePosition = mpos.get
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158
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159 var killed = false
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160 for event in engine.window.pendingEvents():
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161 inc engine.input.eventsProcessed
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162 if engine.eventHandler != nil:
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163 engine.eventHandler(engine, event)
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164 case event.eventType:
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165 of Quit:
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166 killed = true
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167 of ResizedWindow:
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168 engine.input.windowWasResized = true
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169 of KeyPressed:
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170 engine.input.keyWasPressed.incl event.key
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171 engine.input.keyIsDown.incl event.key
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172 of KeyReleased:
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173 engine.input.keyWasReleased.incl event.key
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174 engine.input.keyIsDown.excl event.key
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175 of MousePressed:
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176 engine.input.mouseWasPressed.incl event.button
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177 engine.input.mouseIsDown.incl event.button
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178 of MouseReleased:
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179 engine.input.mouseWasReleased.incl event.button
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180 engine.input.mouseIsDown.excl event.button
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181 of MouseMoved:
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182 let newPos = newVec2(float32(event.x), float32(event.y))
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183 engine.input.mouseMove = newPos - engine.input.mousePosition
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184 engine.input.mousePosition = newPos
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185 of MouseWheel:
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186 engine.input.mouseWheel = event.amount
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187 if engine.state == Starting:
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188 engine.state = Running
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189 if killed:
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190 engine.state = Shutdown
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191 if engine.exitHandler != nil:
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192 engine.exitHandler(engine)
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193 if engine.input.windowWasResized and engine.resizeHandler != nil:
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194 engine.resizeHandler(engine)
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195 return engine.state
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196
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197 # wrappers for internal things
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198 func keyIsDown*(engine: Engine, key: Key): auto = key in engine.input.keyIsDown
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199 func keyWasPressed*(engine: Engine, key: Key): auto = key in engine.input.keyWasPressed
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200 func keyWasPressed*(engine: Engine): auto = engine.input.keyWasPressed.len > 0
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201 func keyWasReleased*(engine: Engine, key: Key): auto = key in engine.input.keyWasReleased
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202 func mouseIsDown*(engine: Engine, button: MouseButton): auto = button in engine.input.mouseIsDown
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203 func mouseWasPressed*(engine: Engine, button: MouseButton): auto = button in engine.input.mouseWasPressed
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204 func mouseWasReleased*(engine: Engine, button: MouseButton): auto = button in engine.input.mouseWasReleased
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205 func mousePosition*(engine: Engine): auto = engine.input.mousePosition
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206 func mousePositionNormalized*(engine: Engine): Vec2f =
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207 result.x = (engine.input.mousePosition.x / float32(engine.window.size[0])) * 2.0 - 1.0
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208 result.y = (engine.input.mousePosition.y / float32(engine.window.size[1])) * 2.0 - 1.0
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209 func mouseMove*(engine: Engine): auto = engine.input.mouseMove
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210 func mouseWheel*(engine: Engine): auto = engine.input.mouseWheel
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211 func eventsProcessed*(engine: Engine): auto = engine.input.eventsProcessed
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212 func framesRendered*(engine: Engine): uint64 = (if engine.renderer.isSome: engine.renderer.get.framesRendered else: 0)
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213 func gpuDevice*(engine: Engine): Device = engine.device
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214 func getWindow*(engine: Engine): auto = engine.window
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215 func getAspectRatio*(engine: Engine): float32 = engine.getWindow().size[0] / engine.getWindow().size[1]
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216 func windowWasResized*(engine: Engine): auto = engine.input.windowWasResized
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217 func showSystemCursor*(engine: Engine) = engine.window.showSystemCursor()
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218 func hideSystemCursor*(engine: Engine) = engine.window.hideSystemCursor()
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219 func fullscreen*(engine: Engine): bool = engine.fullscreen
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220 proc `fullscreen=`*(engine: var Engine, enable: bool) =
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221 if enable != engine.fullscreen:
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222 engine.fullscreen = enable
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223 engine.window.fullscreen(engine.fullscreen)
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224
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225 func limits*(engine: Engine): VkPhysicalDeviceLimits =
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226 engine.gpuDevice().physicalDevice.properties.limits
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227
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228 proc processEvents*(engine: Engine, panel: var Panel) =
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229 let hasMouseNow = panel.contains(engine.mousePositionNormalized, engine.getAspectRatio)
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230
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231 # enter/leave events
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232 if hasMouseNow:
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233 if panel.hasMouse:
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234 if panel.onMouseMove != nil: panel.onMouseMove(panel)
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235 else:
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236 if panel.onMouseEnter != nil: panel.onMouseEnter(panel)
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237 else:
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238 if panel.hasMouse:
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239 if panel.onMouseLeave != nil: panel.onMouseLeave(panel)
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240
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241 # button events
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242 if hasMouseNow:
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243 if engine.input.mouseWasPressed.len > 0:
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244 if panel.onMouseDown != nil: panel.onMouseDown(panel, engine.input.mouseWasPressed)
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245 if engine.input.mouseWasReleased.len > 0:
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246 if panel.onMouseUp != nil: panel.onMouseUp(panel, engine.input.mouseWasReleased)
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247
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248 panel.hasMouse = hasMouseNow