Shaders/DetailShader.cpp at main · SamClassicPatch/Shaders · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
/* Copyright (c) 2002-2012 Croteam Ltd.
This program is free software; you can redistribute it and/or modify
it under the terms of version 2 of the GNU General Public License as published by
the Free Software Foundation


This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */

#include "StdH.h"

#define TEXTURE_COUNT 2
#define UVMAPS_COUNT  1
#define COLOR_COUNT   2
#define FLOAT_COUNT   1
#define FLAGS_COUNT   2

#define DETAIL_TEXTURE 1
#define DETAIL_UVMAP   1
#define DETAIL_COLOR   1
#define DETAIL_TILING  0

SHADER_MAIN(Detail)
{
  shaSetTexture(BASE_TEXTURE);
  shaSetTextureWrapping(GFX_REPEAT, GFX_REPEAT);
  shaSetUVMap(BASE_UVMAP);
  shaSetColor(BASE_COLOR);
  shaEnableDepthTest();
  shaDepthFunc(GFX_LESS_EQUAL);

  COLOR &colModelColor = shaGetModelColor();
  BOOL bDoubleSided = shaGetFlags() & BASE_DOUBLE_SIDED;
  BOOL bOpaque = (colModelColor & 0xFF) == 0xFF;

  if (bDoubleSided) {
    shaCullFace(GFX_NONE);
  } else {
    shaCullFace(GFX_BACK);
  }

  shaCalculateLight();

  // if fully opaque
  if (bOpaque) {
    //shaEnableAlphaTest(TRUE);
    shaDisableBlend();
    shaEnableDepthWrite();

  // if translucent
  } else {
    //shaEnableAlphaTest(FALSE);
    shaEnableBlend();
    shaBlendFunc(GFX_SRC_ALPHA, GFX_INV_SRC_ALPHA);
    shaDisableDepthWrite();
    shaModifyColorForFog();
  }

  if (shaOverBrightningEnabled()) shaSetTextureModulation(2);

  shaRender();

  if (bOpaque) {
    shaDoFogPass();
  }

  // do detail pass
  FLOAT fMul = shaGetFloat(DETAIL_TILING);

  shaBlendFunc(GFX_DST_COLOR, GFX_SRC_COLOR);
  shaSetTexture(DETAIL_TEXTURE);
  shaSetUVMap(DETAIL_UVMAP);
  shaSetColor(DETAIL_COLOR);
  shaCalculateLight();

  shaEnableBlend();

  GFXTexCoord *ptxcOld = shaGetUVMap(0);
  GFXTexCoord *ptxcNew = shaGetNewTexCoordArray();
  INDEX ctTexCoords = shaGetVertexCount();

  if (ctTexCoords > 0) {
    for (INDEX itxc = 0; itxc < ctTexCoords; itxc++) {
      ptxcNew[itxc].u = ptxcOld[itxc].u * fMul;
      ptxcNew[itxc].v = ptxcOld[itxc].v * fMul;
    }

    shaSetTexCoords(ptxcNew);
  }

  shaRender();
  shaDisableBlend();

  /*FLOAT fMul = shaGetFloat(DETAIL_TILING);

  shaSetTexture(BASE_TEXTURE);
  shaSetUVMap(BASE_UVMAP);
  shaSetColor(BASE_COLOR);
  shaCalculateLight();

  shaRender();

  shaEnableBlend(TRUE);
  shaEnableAlphaTest(FALSE);
  shaBlendFunc(GFX_DST_COLOR, GFX_SRC_COLOR);
  shaSetTexture(DETAIL_TEXTURE);
  shaSetUVMap(DETAIL_UVMAP);
  shaSetColor(DETAIL_COLOR);

  INDEX ctTexCoords = 0;
  GFXTexCoord *ptxcOld = shaGetUVMap(0, ctTexCoords);
  GFXTexCoord *ptxcNew = shaGetEmptyUVMap(ctTexCoords);

  if (ctTexCoords > 0) {
    for (INDEX itxc = 0; itxc < ctTexCoords; itxc++) {
      ptxcNew[itxc].u = ptxcOld[itxc].u * fMul;
      ptxcNew[itxc].v = ptxcOld[itxc].v * fMul;
    }

    shaSetUVMap(ptxcNew,ctTexCoords);
  }

  shaRender();
  shaEnableBlend(FALSE);*/

  if (shaOverBrightningEnabled()) shaSetTextureModulation(1);
};

SHADER_DESC(Detail, ShaderDesc &shDesc)
{
  shDesc.sd_astrTextureNames.New(TEXTURE_COUNT);
  shDesc.sd_astrTexCoordNames.New(UVMAPS_COUNT);
  shDesc.sd_astrColorNames.New(COLOR_COUNT);
  shDesc.sd_astrFloatNames.New(FLOAT_COUNT);
  shDesc.sd_astrFlagNames.New(FLAGS_COUNT);

  shDesc.sd_astrTextureNames[0] = "Base texture";
  shDesc.sd_astrTextureNames[1] = "Detail texture";
  shDesc.sd_astrTexCoordNames[0] = "Base UVMap";
  shDesc.sd_astrColorNames[0] = "Surface color";
  shDesc.sd_astrColorNames[1] = "Detail color";
  shDesc.sd_astrFloatNames[0] = "UVMap factor";
  shDesc.sd_astrFlagNames[0] = "Double sided";
  shDesc.sd_astrFlagNames[1] = "Full bright";
  shDesc.sd_strShaderInfo = "Detail shader";
};