Mercurial > games > semicongine

annotate src/semicongine/engine.nim @ 627:34e536f7001f

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add: support for showing/hiding cursur, X11 fullscreen (win32 still missing)
author Sam <sam@basx.dev>
date Sun, 30 Apr 2023 01:02:33 +0700
parents bf2f4a9cd962
children 4d4f7a2eb6ca
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diff changeset
1 import std/sequtils
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2 import ./platform/window
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3
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4 import ./vulkan/api
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5 import ./vulkan/instance
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6 import ./vulkan/device
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7 import ./vulkan/physicaldevice
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8 import ./vulkan/renderpass
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9
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10 import ./gpu_data
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11 import ./entity
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12 import ./renderer
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13 import ./mesh
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14 import ./events
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15 import ./config
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16 import ./math
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17
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18 type
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19 EngineState* = enum
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20 Starting
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21 Running
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22 Shutdown
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23 Destroyed
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24 Input = object
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25 keyIsDown: set[Key]
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26 keyWasPressed: set[Key]
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27 keyWasReleased: set[Key]
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28 mouseIsDown: set[MouseButton]
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29 mouseWasPressed: set[MouseButton]
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30 mouseWasReleased: set[MouseButton]
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31 mousePosition: Vec2f
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32 eventsProcessed: uint64
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33 windowWasResized: bool
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34 Engine* = object
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35 state*: EngineState
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36 device: Device
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37 debugger: Debugger
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38 instance: Instance
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39 window: NativeWindow
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40 renderer: Renderer
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41 input: Input
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42 exitHandler: proc(engine: var Engine)
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43 resizeHandler: proc(engine: var Engine)
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44 eventHandler: proc(engine: var Engine, event: Event)
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45
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46
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47 proc destroy*(engine: var Engine) =
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48 checkVkResult engine.device.vk.vkDeviceWaitIdle()
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49 engine.renderer.destroy()
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50 engine.device.destroy()
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51 if engine.debugger.messenger.valid:
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52 engine.debugger.destroy()
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53 engine.window.destroy()
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54 engine.instance.destroy()
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55 engine.state = Destroyed
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56
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57
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58 proc initEngine*(
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59 applicationName: string,
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60 debug=DEBUG,
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61 exitHandler: proc(engine: var Engine) = nil,
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62 resizeHandler: proc(engine: var Engine) = nil,
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63 eventHandler: proc(engine: var Engine, event: Event) = nil
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64 ): Engine =
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65 result.state = Starting
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66 result.exitHandler = exitHandler
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67 result.resizeHandler = resizeHandler
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68 result.eventHandler = eventHandler
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69 result.window = createWindow(applicationName)
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70
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71 var
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72 instanceExtensions: seq[string]
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73 enabledLayers: seq[string]
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74
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75 if debug:
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76 instanceExtensions.add "VK_EXT_debug_utils"
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77 enabledLayers.add "VK_LAYER_KHRONOS_validation"
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78 if defined(linux):
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79 enabledLayers.add "VK_LAYER_MESA_overlay"
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80 result.instance = result.window.createInstance(
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81 vulkanVersion=VK_MAKE_API_VERSION(0, 1, 3, 0),
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82 instanceExtensions=instanceExtensions,
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83 layers=enabledLayers,
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84 )
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85 if debug:
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86 result.debugger = result.instance.createDebugMessenger()
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87 # create devices
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88 let selectedPhysicalDevice = result.instance.getPhysicalDevices().filterBestGraphics()
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89 result.device = result.instance.createDevice(
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90 selectedPhysicalDevice,
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91 enabledLayers = @[],
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92 enabledExtensions = @[],
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93 selectedPhysicalDevice.filterForGraphicsPresentationQueues()
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94 )
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95
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96 proc setRenderer*(engine: var Engine, renderPass: RenderPass) =
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97 assert engine.state != Destroyed
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98 engine.renderer = engine.device.initRenderer(renderPass)
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99
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100 proc addScene*(engine: var Engine, scene: Entity, vertexInput: seq[ShaderAttribute], transformAttribute="") =
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101 assert engine.state != Destroyed
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102 assert transformAttribute == "" or transformAttribute in map(vertexInput, proc(a: ShaderAttribute): string = a.name)
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103 engine.renderer.setupDrawableBuffers(scene, vertexInput, transformAttribute=transformAttribute)
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104
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105 proc renderScene*(engine: var Engine, scene: Entity) =
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106 assert engine.state == Running
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107 assert engine.renderer.valid
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108 if engine.state == Running:
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109 engine.renderer.refreshMeshData(scene)
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110 engine.renderer.render(scene)
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111
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112 proc updateInputs*(engine: var Engine): EngineState =
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113 assert engine.state in [Starting, Running]
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114
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115 engine.input.keyWasPressed = {}
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116 engine.input.keyWasReleased = {}
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117 engine.input.mouseWasPressed = {}
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118 engine.input.mouseWasReleased = {}
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119 engine.input.windowWasResized = engine.state == Starting
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120
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121 var killed = false
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122 for event in engine.window.pendingEvents():
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123 inc engine.input.eventsProcessed
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124 if engine.eventHandler != nil:
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125 engine.eventHandler(engine, event)
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126 case event.eventType:
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127 of Quit:
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128 killed = true
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129 of ResizedWindow:
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130 engine.input.windowWasResized = true
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131 of KeyPressed:
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132 engine.input.keyWasPressed.incl event.key
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133 engine.input.keyIsDown.incl event.key
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134 of KeyReleased:
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135 engine.input.keyWasReleased.incl event.key
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136 engine.input.keyIsDown.excl event.key
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137 of MousePressed:
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138 engine.input.mouseWasPressed.incl event.button
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139 engine.input.mouseIsDown.incl event.button
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140 of MouseReleased:
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141 engine.input.mouseWasReleased.incl event.button
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142 engine.input.mouseIsDown.excl event.button
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143 of MouseMoved:
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144 engine.input.mousePosition = newVec2(float32(event.x), float32(event.y))
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145 if engine.state == Starting:
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146 engine.state = Running
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147 if killed:
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148 engine.state = Shutdown
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149 if engine.exitHandler != nil:
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150 engine.exitHandler(engine)
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151 if engine.input.windowWasResized and engine.resizeHandler != nil:
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152 engine.resizeHandler(engine)
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153 return engine.state
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154
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155 # wrappers for internal things
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156 func keyIsDown*(engine: Engine, key: Key): auto = key in engine.input.keyIsDown
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157 func keyWasPressed*(engine: Engine, key: Key): auto = key in engine.input.keyWasPressed
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158 func keyWasReleased*(engine: Engine, key: Key): auto = key in engine.input.keyWasReleased
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159 func mouseIsDown*(engine: Engine, button: MouseButton): auto = button in engine.input.mouseIsDown
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parents: 588
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160 func mouseWasPressed*(engine: Engine, button: MouseButton): auto = button in engine.input.mouseWasPressed
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parents: 588
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161 func mouseWasReleased*(engine: Engine, button: MouseButton): auto = button in engine.input.mouseWasReleased
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162 func mousePosition*(engine: Engine): auto = engine.input.mousePosition
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163 func eventsProcessed*(engine: Engine): auto = engine.input.eventsProcessed
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parents: 588
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164 func framesRendered*(engine: Engine): auto = engine.renderer.framesRendered
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165 func gpuDevice*(engine: Engine): Device = engine.device
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parents: 595
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166 func getWindow*(engine: Engine): auto = engine.window
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parents: 603
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167 func windowWasResized*(engine: Engine): auto = engine.input.windowWasResized
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168 func showSystemCursor*(engine: Engine) = engine.window.showSystemCursor()
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parents: 613
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169 func hideSystemCursor*(engine: Engine) = engine.window.hideSystemCursor()
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170 proc fullscreen*(engine: Engine, enable: bool) = engine.window.fullscreen(enable)