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
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
|
/*
Copyright 2016-2019 Arisotura
This file is part of melonDS.
melonDS is free software: you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation, either version 3 of the License, or (at your option)
any later version.
melonDS 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 melonDS. If not, see http://www.gnu.org/licenses/.
*/
#ifndef MAIN_SHADERS_H
#define MAIN_SHADERS_H
const char* kScreenVS = R"(#version 140
layout(std140) uniform uConfig
{
vec2 uScreenSize;
uint u3DScale;
uint uFilterMode;
};
in vec2 vPosition;
in vec2 vTexcoord;
smooth out vec2 fTexcoord;
void main()
{
vec4 fpos;
fpos.xy = ((vPosition.xy * 2.0) / uScreenSize) - 1.0;
fpos.y *= -1;
fpos.z = 0.0;
fpos.w = 1.0;
gl_Position = fpos;
fTexcoord = vTexcoord;
}
)";
const char* kScreenFS = R"(#version 140
layout(std140) uniform uConfig
{
vec2 uScreenSize;
uint u3DScale;
uint uFilterMode;
};
uniform usampler2D ScreenTex;
uniform sampler2D _3DTex;
smooth in vec2 fTexcoord;
out vec4 oColor;
void main()
{
ivec4 pixel = ivec4(texelFetch(ScreenTex, ivec2(fTexcoord), 0));
ivec4 zog=pixel;
// bit0-13: BLDCNT
// bit14-15: DISPCNT display mode
// bit16-20: EVA
// bit21-25: EVB
// bit26-30: EVY
ivec4 ctl = ivec4(texelFetch(ScreenTex, ivec2(256*3, int(fTexcoord.y)), 0));
int dispmode = (ctl.g >> 6) & 0x3;
if (dispmode == 1)
{
int eva = ctl.b & 0x1F;
int evb = (ctl.b >> 5) | ((ctl.a & 0x03) << 3);
int evy = ctl.a >> 2;
ivec4 top = pixel;
ivec4 mid = ivec4(texelFetch(ScreenTex, ivec2(fTexcoord) + ivec2(256,0), 0));
ivec4 bot = ivec4(texelFetch(ScreenTex, ivec2(fTexcoord) + ivec2(512,0), 0));
int winmask = top.b >> 7;
if ((top.a & 0xC0) == 0x40)
{
float xpos = top.r + fract(fTexcoord.x);
float ypos = mod(fTexcoord.y, 768);
ivec4 _3dpix = ivec4(texelFetch(_3DTex, ivec2(vec2(xpos, ypos)*u3DScale), 0).bgra
* vec4(63,63,63,31));
if (_3dpix.a > 0) { top = _3dpix; top.a |= 0x40; bot = mid; }
else top = mid;
}
else if ((mid.a & 0xC0) == 0x40)
{
float xpos = mid.r + fract(fTexcoord.x);
float ypos = mod(fTexcoord.y, 768);
ivec4 _3dpix = ivec4(texelFetch(_3DTex, ivec2(vec2(xpos, ypos)*u3DScale), 0).bgra
* vec4(63,63,63,31));
if (_3dpix.a > 0) { bot = _3dpix; bot.a |= 0x40; }
}
else
{
// conditional texture fetch no good for performance, apparently
//texelFetch(_3DTex, ivec2(0, fTexcoord.y*2), 0);
bot = mid;
}
top.b &= 0x3F;
bot.b &= 0x3F;
int target2;
if ((bot.a & 0x80) != 0) target2 = 0x10;
else if ((bot.a & 0x40) != 0) target2 = 0x01;
else target2 = bot.a;
bool t2pass = ((ctl.g & target2) != 0);
int coloreffect = 0;
if ((top.a & 0x80) != 0 && t2pass)
{
// sprite blending
coloreffect = 1;
if ((top.a & 0x40) != 0)
{
eva = top.a & 0x1F;
evb = 16 - eva;
}
}
else if ((top.a & 0x40) != 0 && t2pass)
{
// 3D layer blending
coloreffect = 4;
eva = (top.a & 0x1F) + 1;
evb = 32 - eva;
}
else
{
if ((top.a & 0x80) != 0) top.a = 0x10;
else if ((top.a & 0x40) != 0) top.a = 0x01;
if ((ctl.r & top.a) != 0 && winmask != 0)
{
int effect = ctl.r >> 6;
if ((effect != 1) || t2pass) coloreffect = effect;
}
}
if (coloreffect == 0)
{
pixel = top;
}
else if (coloreffect == 1)
{
pixel = ((top * eva) + (bot * evb)) >> 4;
pixel = min(pixel, 0x3F);
}
else if (coloreffect == 2)
{
pixel = top;
pixel += ((ivec4(0x3F,0x3F,0x3F,0) - pixel) * evy) >> 4;
}
else if (coloreffect == 3)
{
pixel = top;
pixel -= (pixel * evy) >> 4;
}
else
{
pixel = ((top * eva) + (bot * evb)) >> 5;
if (eva <= 16) pixel += ivec4(1,1,1,0);
pixel = min(pixel, 0x3F);
}
}
pixel.rgb <<= 2;
pixel.rgb |= (pixel.rgb >> 6);
// TODO: filters
oColor = vec4(vec3(pixel.rgb) / 255.0, 1.0);
}
)";
#endif // MAIN_SHADERS_H
|