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/*
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 * 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;
smooth in vec2 fTexcoord;
out vec4 oColor;
void main()
{
ivec4 pixel = ivec4(texelFetch(ScreenTex, ivec2(fTexcoord), 0));
// TODO: filters
oColor = vec4(vec3(pixel.bgr) / 255.0, 1.0);
}
)";
const char* kScreenFS_Accel = 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 mbright = ivec4(texelFetch(ScreenTex, ivec2(256*3, int(fTexcoord.y)), 0));
int dispmode = mbright.b & 0x3;
if (dispmode == 1)
{
ivec4 val1 = pixel;
ivec4 val2 = ivec4(texelFetch(ScreenTex, ivec2(fTexcoord) + ivec2(256,0), 0));
ivec4 val3 = ivec4(texelFetch(ScreenTex, ivec2(fTexcoord) + ivec2(512,0), 0));
int compmode = val3.a & 0xF;
int eva, evb, evy;
if (compmode == 4)
{
// 3D on top, blending
float xpos = val3.r + fract(fTexcoord.x);
float ypos = mod(fTexcoord.y, 192);
ivec4 _3dpix = ivec4(texelFetch(_3DTex, ivec2(vec2(xpos, ypos)*u3DScale), 0).bgra
* vec4(63,63,63,31));
if (_3dpix.a > 0)
{
eva = (_3dpix.a & 0x1F) + 1;
evb = 32 - eva;
val1 = ((_3dpix * eva) + (val1 * evb)) >> 5;
if (eva <= 16) val1 += ivec4(1,1,1,0);
val1 = min(val1, 0x3F);
}
else
val1 = val2;
}
else if (compmode == 1)
{
// 3D on bottom, blending
float xpos = val3.r + fract(fTexcoord.x);
float ypos = mod(fTexcoord.y, 192);
ivec4 _3dpix = ivec4(texelFetch(_3DTex, ivec2(vec2(xpos, ypos)*u3DScale), 0).bgra
* vec4(63,63,63,31));
if (_3dpix.a > 0)
{
eva = val3.g;
evb = val3.b;
val1 = ((val1 * eva) + (_3dpix * evb)) >> 4;
val1 = min(val1, 0x3F);
}
else
val1 = val2;
}
else if (compmode <= 3)
{
// 3D on top, normal/fade
float xpos = val3.r + fract(fTexcoord.x);
float ypos = mod(fTexcoord.y, 192);
ivec4 _3dpix = ivec4(texelFetch(_3DTex, ivec2(vec2(xpos, ypos)*u3DScale), 0).bgra
* vec4(63,63,63,31));
if (_3dpix.a > 0)
{
evy = val3.g;
val1 = _3dpix;
if (compmode == 2) val1 += ((ivec4(0x3F,0x3F,0x3F,0) - val1) * evy) >> 4;
else if (compmode == 3) val1 -= (val1 * evy) >> 4;
}
else
val1 = val2;
}
pixel = val1;
}
if (dispmode != 0)
{
int brightmode = mbright.g >> 6;
if (brightmode == 1)
{
// up
int evy = mbright.r & 0x1F;
if (evy > 16) evy = 16;
pixel += ((ivec4(0x3F,0x3F,0x3F,0) - pixel) * evy) >> 4;
}
else if (brightmode == 2)
{
// down
int evy = mbright.r & 0x1F;
if (evy > 16) evy = 16;
pixel -= (pixel * evy) >> 4;
}
}
pixel.rgb <<= 2;
pixel.rgb |= (pixel.rgb >> 6);
// TODO: filters
oColor = vec4(vec3(pixel.rgb) / 255.0, 1.0);
}
)";
const char* kScreenVS_OSD = R"(#version 140
layout(std140) uniform uConfig
{
vec2 uScreenSize;
uint u3DScale;
uint uFilterMode;
};
uniform ivec2 uOSDPos;
uniform ivec2 uOSDSize;
in vec2 vPosition;
smooth out vec2 fTexcoord;
void main()
{
vec4 fpos;
vec2 osdpos = (vPosition * vec2(uOSDSize));
fTexcoord = osdpos;
osdpos += uOSDPos;
fpos.xy = ((osdpos * 2.0) / uScreenSize) - 1.0;
fpos.y *= -1;
fpos.z = 0.0;
fpos.w = 1.0;
gl_Position = fpos;
}
)";
const char* kScreenFS_OSD = R"(#version 140
uniform sampler2D OSDTex;
smooth in vec2 fTexcoord;
out vec4 oColor;
void main()
{
vec4 pixel = texelFetch(OSDTex, ivec2(fTexcoord), 0);
oColor = pixel.bgra;
}
)";
#endif // MAIN_SHADERS_H
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