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82 lines
3.1 KiB
Plaintext
82 lines
3.1 KiB
Plaintext
// Copyright 1998-2015 Epic Games, Inc. All Rights Reserved.
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/*=============================================================================
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TinyFontCommon.usf: TinyFont shared functions and structures.
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=============================================================================*/
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#ifndef __TINY_FONT_COMMON__
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#define __TINY_FONT_COMMON__
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Texture2D MiniFontTexture;
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// for printf debugging in the shader
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// @param LeftTop - is advanced, in pixels
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void PrintCharacter(int2 PixelPos, inout float3 OutColor, float3 FontColor, inout int2 LeftTop, int CharacterID)
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{
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uint2 Rel = (uint2)(PixelPos - LeftTop);
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FLATTEN if (Rel.x < 8 && Rel.y < 8)
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{
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OutColor = lerp(OutColor, FontColor, MiniFontTexture.Load(int3(CharacterID * 8 + Rel.x, Rel.y, 0)).r);
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}
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LeftTop.x += 8;
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}
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// only for positive numbers
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// @param DigitValue - e.g. 1 for frist digit before period, 10 for second, 0.1 for first digit behind period
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uint ExtractDigitFromFloat(float Number, float DigitValue)
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{
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uint Temp = (uint)(Number / DigitValue);
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return Temp % 10;
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}
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// for printf debugging in the shader, has to be positive
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// outputs a float number in the form: xxx.yyy
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// @param LeftTop - in pixels
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void PrintFloat(int2 PixelPos, inout float3 OutColor, float3 FontColor, int2 LeftTop, float Number)
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{
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int2 Cursor = LeftTop;
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float BorderDistance = ComputeDistanceToRect(PixelPos, LeftTop, int2(7, 1) * 8 - 1);
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// black border around number
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// OutColor = lerp(0, OutColor, saturate(BorderDistance - 2));
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// before period
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PrintCharacter(PixelPos, OutColor, FontColor, Cursor, ExtractDigitFromFloat(Number, 100));
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PrintCharacter(PixelPos, OutColor, FontColor, Cursor, ExtractDigitFromFloat(Number, 10));
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PrintCharacter(PixelPos, OutColor, FontColor, Cursor, ExtractDigitFromFloat(Number, 1));
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// period
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PrintCharacter(PixelPos, OutColor, FontColor, Cursor, 512 / 8 - 3);
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// after period
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PrintCharacter(PixelPos, OutColor, FontColor, Cursor, ExtractDigitFromFloat(Number, 0.1));
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PrintCharacter(PixelPos, OutColor, FontColor, Cursor, ExtractDigitFromFloat(Number, 0.01));
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PrintCharacter(PixelPos, OutColor, FontColor, Cursor, ExtractDigitFromFloat(Number, 0.001));
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}
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// for printf debugging in the shader, has to be positive
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// outputs a float number in the form: xxx.yyy
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// @param LeftTop - in pixels
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void PrintFloatNoFraction(int2 PixelPos, inout float3 OutColor, float3 FontColor, int2 LeftTop, float Number)
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{
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int2 Cursor = LeftTop;
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float BorderDistance = ComputeDistanceToRect(PixelPos, LeftTop, int2(7, 1) * 8 - 1);
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// black border around number
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// OutColor = lerp(0, OutColor, saturate(BorderDistance - 2));
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// before period
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PrintCharacter(PixelPos, OutColor, FontColor, Cursor, ExtractDigitFromFloat(Number, 10000));
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PrintCharacter(PixelPos, OutColor, FontColor, Cursor, ExtractDigitFromFloat(Number, 1000));
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PrintCharacter(PixelPos, OutColor, FontColor, Cursor, ExtractDigitFromFloat(Number, 100));
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PrintCharacter(PixelPos, OutColor, FontColor, Cursor, ExtractDigitFromFloat(Number, 10));
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PrintCharacter(PixelPos, OutColor, FontColor, Cursor, ExtractDigitFromFloat(Number, 1));
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}
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#endif // __TINY_FONT_COMMON__
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