mirror of
https://github.com/RetroDECK/Duckstation.git
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228 lines
9.1 KiB
HLSL
228 lines
9.1 KiB
HLSL
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#ifndef _DRAWTEXT_H_
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#define _DRAWTEXT_H_
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#define _DRAWTEXT_GRID_X 14.0
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#define _DRAWTEXT_GRID_Y 7.0
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///////////////////////////////////////////////////////////////////////////////////////////////////////
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// //
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// DrawText.fxh by kingreic1992 ( update: Sep.28.2019 ) //
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// //
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//+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++//
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// //
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// Available functions: //
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// DrawText_String( offset, text size, xy ratio, input coord, string array, array size, output) //
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// float2 offset = top left corner of string, screen hight pixel unit. //
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// float text size = text size, screen hight pixel unit. //
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// float xy ratio = xy ratio of text. //
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// float2 input coord = current texture coord. //
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// int string array = string data in float2 array format, ex: "Demo Text" //
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// int String0[9] = { __D, __e, __m, __o, __Space, __T, __e, __x, __t}; //
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// int string size = size of the string array. //
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// float output = output. //
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// //
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// DrawText_Digit( offset, text size, xy ratio, input coord, precision after dot, data, output) //
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// float2 offset = same as DrawText_String. //
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// float text size = same as DrawText_String. //
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// float xy ratio = same as DrawText_String. //
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// float2 input coord = same as DrawText_String. //
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// int precision = digits after dot. //
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// float data = input float. //
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// float output = output. //
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// //
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// float2 DrawText_Shift(offset, shift, text size, xy ratio) //
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// float2 offset = same as DrawText_String. //
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// float2 shift = shift line(y) and column. //
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// float text size = same as DrawText_String. //
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// float xy ratio = same as DrawText_String. //
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// //
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///////////////////////////////////////////////////////////////////////////////////////////////////////
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//Sample Usage
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/*
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#include "DrawText.fxh"
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float4 main_fragment( float4 position : POSITION,
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float2 txcoord : TEXCOORD) : COLOR {
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float res = 0.0;
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int line0[9] = { __D, __e, __m, __o, __Space, __T, __e, __x, __t }; //Demo Text
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int line1[15] = { __b, __y, __Space, __k, __i, __n, __g, __e, __r, __i, __c, __1, __9, __9, __2 }; //by kingeric1992
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int line2[6] = { __S, __i, __z, __e, __Colon, __Space }; // Size: %d.
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DrawText_String(float2(100.0 , 100.0), 32, 1, txcoord, line0, 9, res);
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DrawText_String(float2(100.0 , 134.0), textSize, 1, txcoord, line1, 15, res);
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DrawText_String(DrawText_Shift(float2(100.0 , 134.0), int2(0, 1), textSize, 1), 18, 1, txcoord, line2, 6, res);
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DrawText_Digit(DrawText_Shift(DrawText_Shift(float2(100.0 , 134.0), int2(0, 1), textSize, 1), int2(8, 0), 18, 1),
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18, 1, txcoord, 0, textSize, res);
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return res;
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}
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*/
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//Text display
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//Character indexing
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#define __Space 0 // (space)
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#define __Exclam 1 // !
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#define __Quote 2 // "
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#define __Pound 3 // #
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#define __Dollar 4 // $
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#define __Percent 5 // %
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#define __And 6 // &
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#define __sQuote 7 // '
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#define __rBrac_O 8 // (
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#define __rBrac_C 9 // )
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#define __Asterisk 10 // *
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#define __Plus 11 // +
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#define __Comma 12 // ,
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#define __Minus 13 // -
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#define __Dot 14 // .
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#define __Slash 15 // /
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#define __0 16 // 0
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#define __1 17 // 1
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#define __2 18 // 2
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#define __3 19 // 3
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#define __4 20 // 4
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#define __5 21 // 5
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#define __6 22 // 6
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#define __7 23 // 7
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#define __8 24 // 8
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#define __9 25 // 9
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#define __Colon 26 // :
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#define __sColon 27 // ;
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#define __Less 28 // <
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#define __Equals 29 // =
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#define __Greater 30 // >
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#define __Question 31 // ?
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#define __at 32 // @
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#define __A 33 // A
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#define __B 34 // B
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#define __C 35 // C
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#define __D 36 // D
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#define __E 37 // E
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#define __F 38 // F
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#define __G 39 // G
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#define __H 40 // H
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#define __I 41 // I
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#define __J 42 // J
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#define __K 43 // K
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#define __L 44 // L
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#define __M 45 // M
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#define __N 46 // N
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#define __O 47 // O
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#define __P 48 // P
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#define __Q 49 // Q
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#define __R 50 // R
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#define __S 51 // S
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#define __T 52 // T
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#define __U 53 // U
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#define __V 54 // V
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#define __W 55 // W
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#define __X 56 // X
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#define __Y 57 // Y
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#define __Z 58 // Z
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#define __sBrac_O 59 // [
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#define __Backslash 60 // \..
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#define __sBrac_C 61 // ]
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#define __Caret 62 // ^
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#define __Underscore 63 // _
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#define __Punc 64 // `
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#define __a 65 // a
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#define __b 66 // b
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#define __c 67 // c
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#define __d 68 // d
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#define __e 69 // e
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#define __f 70 // f
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#define __g 71 // g
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#define __h 72 // h
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#define __i 73 // i
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#define __j 74 // j
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#define __k 75 // k
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#define __l 76 // l
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#define __m 77 // m
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#define __n 78 // n
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#define __o 79 // o
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#define __p 80 // p
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#define __q 81 // q
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#define __r 82 // r
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#define __s 83 // s
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#define __t 84 // t
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#define __u 85 // u
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#define __v 86 // v
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#define __w 87 // w
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#define __x 88 // x
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#define __y 89 // y
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#define __z 90 // z
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#define __cBrac_O 91 // {
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#define __vBar 92 // |
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#define __cBrac_C 93 // }
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#define __Tilde 94 // ~
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#define __tridot 95 // (...)
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#define __empty0 96 // (null)
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#define __empty1 97 // (null)
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//Character indexing ends
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texture Texttex < source = "FontAtlas.png"; > {
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Width = 512;
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Height = 512;
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};
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sampler samplerText {
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Texture = Texttex;
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};
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//accomodate for undef array size.
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#define DrawText_String( pos, size, ratio, tex, array, arrSize, output ) \
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{ float text = 0.0; \
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float2 uv = (tex * float2(BUFFER_WIDTH, BUFFER_HEIGHT) - pos) / size; \
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uv.y = saturate(uv.y); \
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uv.x *= ratio * 2.0; \
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float id = array[int(trunc(uv.x))]; \
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if(uv.x <= arrSize && uv.x >= 0.0) \
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text = tex2D(samplerText, (frac(uv) + float2( id % 14.0, trunc(id / 14.0))) \
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/ float2( _DRAWTEXT_GRID_X, _DRAWTEXT_GRID_Y) ).x; \
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output += text; }
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float2 DrawText_Shift( float2 pos, int2 shift, float size, float ratio ) {
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return pos + size * shift * float2(0.5, 1.0) / ratio;
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}
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void DrawText_Digit( float2 pos, float size, float ratio, float2 tex, int digit, float data, inout float res) {
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int digits[13] = {
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__0, __1, __2, __3, __4, __5, __6, __7, __8, __9, __Minus, __Space, __Dot
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};
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float2 uv = (tex * float2(BUFFER_WIDTH, BUFFER_HEIGHT) - pos) / size;
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uv.y = saturate(uv.y);
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uv.x *= ratio * 2.0;
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float t = abs(data);
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int radix = floor(t)? ceil(log2(t)/3.32192809):0;
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//early exit:
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if(uv.x > digit+1 || -uv.x > radix+1) return;
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float index = t;
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if(floor(uv.x) > 0)
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for(int i = ceil(-uv.x); i<0; i++) index *= 10.;
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else
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for(int i = ceil(uv.x); i<0; i++) index /= 10.;
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index = (uv.x >= -radix-!radix)? index%10 : (10+step(0, data)); //adding sign
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index = (uv.x > 0 && uv.x < 1)? 12:index; //adding dot
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index = digits[(uint)index];
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res += tex2D(samplerText, (frac(uv) + float2( index % 14.0, trunc(index / 14.0))) /
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float2( _DRAWTEXT_GRID_X, _DRAWTEXT_GRID_Y)).x;
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}
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#endif
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