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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 787 | chris | 1 | using System; |
| 2 | using System.Collections.Generic; |
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| 3 | using System.Linq; |
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| 4 | using System.Text; |
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| 5 | using System.Threading.Tasks; |
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| 6 | |||
| 7 | using Tao.OpenGl; |
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| 8 | |||
| 9 | namespace BauzoidNET.graphics.renderstates |
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| 10 | { |
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| 11 | public class BlendingStates : RenderStatesObject |
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| 12 | { |
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| 13 | public enum BlendingMode |
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| 14 | { |
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| 15 | ADD, |
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| 16 | ALPHABLEND, |
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| 17 | SUBTRACT, |
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| 18 | // MIN, // unsupported on OpenGL ES |
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| 19 | // MAX, // unsupported on OpenGL ES |
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| 20 | MULTIPLY |
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| 21 | }; |
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| 22 | |||
| 23 | private bool mEnabled = false; |
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| 24 | private BlendingMode mBlendingMode = BlendingMode.ALPHABLEND; |
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| 25 | private bool mCurrentlyEnabled = false; |
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| 26 | private BlendingMode mCurrentBlendingMode = BlendingMode.ALPHABLEND; |
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| 27 | private bool mDefaultEnabled = false; |
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| 28 | private BlendingMode mDefaultBlendingMode = BlendingMode.ALPHABLEND; |
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| 29 | |||
| 30 | /** Constructor. */ |
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| 31 | public BlendingStates(RenderStates renderStates) : base(renderStates) |
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| 32 | { |
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| 33 | } |
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| 34 | |||
| 35 | /** Activate the render state. Manages multiple same-state changes. */ |
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| 36 | public override void activate(bool force) |
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| 37 | { |
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| 38 | if ((force) || (mBlendingMode != mCurrentBlendingMode)) |
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| 39 | { |
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| 40 | mCurrentBlendingMode = mBlendingMode; |
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| 41 | switch (mBlendingMode) |
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| 42 | { |
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| 43 | case BlendingMode.ADD: |
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| 44 | { |
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| 45 | Gl.glBlendFunc(Gl.GL_SRC_ALPHA, Gl.GL_ONE); |
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| 46 | break; |
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| 47 | } |
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| 48 | case BlendingMode.ALPHABLEND: |
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| 49 | { |
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| 50 | Gl.glBlendFunc(Gl.GL_SRC_ALPHA, Gl.GL_ONE_MINUS_SRC_ALPHA); |
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| 51 | break; |
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| 52 | } |
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| 53 | case BlendingMode.SUBTRACT: |
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| 54 | { |
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| 55 | Gl.glBlendFunc(Gl.GL_ZERO, Gl.GL_SRC_ALPHA); |
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| 56 | break; |
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| 57 | } |
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| 58 | case BlendingMode.MULTIPLY: |
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| 59 | { |
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| 60 | Gl.glBlendFunc(Gl.GL_ZERO, Gl.GL_SRC_COLOR); |
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| 61 | break; |
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| 62 | } |
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| 63 | } |
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| 64 | } |
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| 65 | |||
| 66 | if ((force) || (mEnabled != mCurrentlyEnabled)) |
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| 67 | { |
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| 68 | mCurrentlyEnabled = mEnabled; |
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| 69 | if (mEnabled) |
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| 70 | { |
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| 71 | Gl.glEnable(Gl.GL_BLEND); |
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| 72 | } |
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| 73 | else |
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| 74 | { |
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| 75 | Gl.glDisable(Gl.GL_BLEND); |
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| 76 | } |
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| 77 | } |
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| 78 | } |
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| 79 | |||
| 80 | /** Reset to default values. */ |
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| 81 | public override void reset() |
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| 82 | { |
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| 83 | if ((mLocked) || (mRenderStates.isLocked())) |
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| 84 | return; |
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| 85 | mEnabled = mDefaultEnabled; |
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| 86 | mBlendingMode = mDefaultBlendingMode; |
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| 87 | } |
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| 88 | |||
| 89 | /** Check if blending is enabled. */ |
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| 90 | public bool isEnabled() |
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| 91 | { |
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| 92 | return mEnabled; |
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| 93 | } |
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| 94 | |||
| 95 | /** Check if blending is enabled by default. */ |
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| 96 | public bool isDefaultEnabled() |
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| 97 | { |
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| 98 | return mEnabled; |
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| 99 | } |
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| 100 | |||
| 101 | /** Check blending mode. */ |
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| 102 | public BlendingMode getBlendingMode() |
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| 103 | { |
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| 104 | return mBlendingMode; |
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| 105 | } |
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| 106 | |||
| 107 | /** Check default blending mode. */ |
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| 108 | public BlendingMode getDefaultBlendingMode() |
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| 109 | { |
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| 110 | return mDefaultBlendingMode; |
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| 111 | } |
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| 112 | |||
| 113 | /** Set enabled state. */ |
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| 114 | public void setEnabled(bool value) |
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| 115 | { |
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| 116 | if ((mLocked) || (mRenderStates.isLocked())) |
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| 117 | return; |
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| 118 | |||
| 119 | mEnabled = value; |
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| 120 | } |
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| 121 | |||
| 122 | /** Set default enabled state. */ |
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| 123 | public void setDefaultEnabled(bool value) |
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| 124 | { |
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| 125 | if ((mLocked) || (mRenderStates.isLocked())) |
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| 126 | return; |
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| 127 | |||
| 128 | mDefaultEnabled = value; |
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| 129 | } |
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| 130 | |||
| 131 | /** Set blending mode. */ |
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| 132 | public void setBlendingMode(BlendingMode value) |
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| 133 | { |
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| 134 | if ((mLocked) || (mRenderStates.isLocked())) |
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| 135 | return; |
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| 136 | |||
| 137 | mBlendingMode = value; |
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| 138 | } |
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| 139 | |||
| 140 | /** Set default blending mode. */ |
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| 141 | public void setDefaultBlendingMode(BlendingMode value) |
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| 142 | { |
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| 143 | if ((mLocked) || (mRenderStates.isLocked())) |
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| 144 | return; |
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| 145 | |||
| 146 | mDefaultBlendingMode = value; |
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| 147 | } |
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| 148 | |||
| 149 | } |
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| 150 | } |