lol/src/gpu/palette.lolfx

[vert.glsl]

#version 120

attribute vec3 in_Position;
attribute vec2 in_TexCoord;
varying vec2 pass_TexCoord;

uniform mat4 u_projection;
uniform mat4 u_view;
uniform mat4 u_model;

void main()
{
    gl_Position = u_projection * u_view * u_model
                * vec4(in_Position, 1.0);
    pass_TexCoord = in_TexCoord;
}

[frag.glsl]

#version 120

#if defined GL_ES
precision mediump float;
#endif

uniform sampler2D u_texture;
uniform sampler2D u_palette;
uniform vec2 u_texsize;
varying vec2 pass_TexCoord;

void main()
{
    vec4 pal = texture2D(u_texture, pass_TexCoord);
    vec4 col = texture2D(u_palette, vec2(pal.x, 0.f));
    if (pal.x == 0.0)
        discard;
    gl_FragColor = col;
}

[vert.hlsl]

void main(float4 in_Position : POSITION,
          float2 in_TexCoord : TEXCOORD0,
          uniform float4x4 u_projection,
          uniform float4x4 u_view,
          uniform float4x4 u_model,
          uniform float2 u_texsize,
          out float2 out_TexCoord : TEXCOORD0,
          out float4 out_Position : POSITION)
{
#if _XBOX
    float2 delta = float2(-0.5, -0.5) / u_texsize;
#else
    float2 delta = float2(0.0, 0.0);
#endif
    out_Position = mul(u_projection, mul(u_view, mul(u_model, in_Position)));
    out_TexCoord = in_TexCoord + delta;
}

[frag.hlsl]

void main(float2 in_TexCoord : TEXCOORD0,
          uniform sampler2D u_texture,
          out float4 out_FragColor : COLOR)
{
    float4 col = tex2D(u_texture, in_TexCoord);
    out_FragColor = col;
}