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annotate tests/test_font.nim @ 733:07c755e65a4a

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add: final font-rendering, API changes fixed
author Sam <sam@basx.dev>
date Tue, 30 May 2023 16:59:01 +0700
parents 443791a202c8
children b145a05c2459
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1 import std/unicode
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2 import std/tables
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3
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4 import semicongine
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5
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6 proc main() =
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7 var sampler = DefaultSampler()
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8 sampler.magnification = VK_FILTER_NEAREST
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9 sampler.minification = VK_FILTER_NEAREST
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10 var font = loadFont("DejaVuSans.ttf", color=newVec4f(1, 0.5, 0.5, 1), resolution=20)
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11
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12 var scene = newScene("main", root=newEntity("rect"))
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13
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14 var flag = rect()
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15 flag.setInstanceData("material", @[0'u8])
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16 # scene.root.add flag
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17 scene.addMaterial Material(name: "material", textures: {"textures": Texture(image: loadImage("flag.png"), sampler: sampler)}.toTable)
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18
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19 var textbox = newTextbox(32, font, "".toRunes)
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20 scene.addMaterial Material(name: "fontMaterial", textures: {"textures": font.fontAtlas}.toTable)
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21 textbox.mesh.setInstanceData("material", @[1'u8])
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22 textbox.transform = scale3d(0.1, 0.1)
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23 scene.root.add textbox
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24
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25 const
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26 vertexInput = @[
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27 attr[Mat4]("transform", memoryPerformanceHint=PreferFastRead, perInstance=true),
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28 attr[Vec3f]("position", memoryPerformanceHint=PreferFastRead),
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29 attr[Vec2f]("uv", memoryPerformanceHint=PreferFastRead),
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30 attr[uint8]("material", memoryPerformanceHint=PreferFastRead, perInstance=true),
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31 ]
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32 intermediate = @[attr[Vec2f]("uvout"), attr[uint8]("materialId", noInterpolation=true)]
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33 samplers = @[attr[Sampler2DType]("textures", arrayCount=2)]
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34 uniforms = @[attr[Mat4]("perspective")]
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35 fragOutput = @[attr[Vec4f]("color")]
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36 (vertexCode, fragmentCode) = compileVertexFragmentShaderSet(
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37 inputs=vertexInput,
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38 intermediate=intermediate,
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39 outputs=fragOutput,
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40 samplers=samplers,
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41 uniforms=uniforms,
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42 vertexCode="""gl_Position = vec4(position, 1.0) * (transform * Uniforms.perspective); uvout = uv; materialId = material;""",
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43 fragmentCode="""color = texture(textures[materialId], uvout);""",
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44 )
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45
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46 var engine = initEngine("Test fonts")
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47 engine.setRenderer(engine.gpuDevice.simpleForwardRenderPass(vertexCode, fragmentCode))
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48 engine.addScene(scene, vertexInput, samplers)
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49 scene.addShaderGlobal("perspective", Unit4F32)
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50
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51 while engine.updateInputs() == Running and not engine.keyIsDown(Escape):
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52 if engine.windowWasResized():
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53 var winSize = engine.getWindow().size
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54 scene.setShaderGlobal("perspective", orthoWindowAspect(winSize[1] / winSize[0]))
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55 for c in [Key.A, Key.B, Key.C, Key.D, Key.E, Key.F, Key.G, Key.H, Key.I, Key.J, Key.K, Key.L, Key.M, Key.N, Key.O, Key.P, Key.Q, Key.R, Key.S, Key.T, Key.U, Key.V, Key.W, Key.X, Key.Y, Key.Z]:
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56 if engine.keyWasPressed(c):
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57 if engine.keyIsDown(ShiftL) or engine.keyIsDown(ShiftR):
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58 textbox.text = textbox.text & ($c).toRunes
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59 else:
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60 textbox.text = textbox.text & ($c).toRunes[0].toLower()
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61 if engine.keyWasPressed(Space):
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62 textbox.text = textbox.text & " ".toRunes[0]
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63 if engine.keyWasPressed(Backspace) and textbox.text.len > 0:
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64 textbox.text = textbox.text[0 ..< ^1]
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65 engine.renderScene(scene)
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66 engine.destroy()
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67
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68
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69 when isMainModule:
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70 main()