package main
import sg "sokol/gfx"
import glm "core:math/linalg/glsl"
/*
    #version:1# (machine generated, don't edit!)

    Generated by sokol-shdc (https://github.com/floooh/sokol-tools)

    Cmdline:
        sokol-shdc -i shader.glsl -o shader.odin -l hlsl5:glsl430 -f sokol_odin

    Overview:
    =========
    Shader program: 'quad':
        Get shader desc: quad_shader_desc(sg.query_backend())
        Vertex Shader: vs
        Fragment Shader: fs
        Attributes:
            ATTR_quad_position => 0
            ATTR_quad_inst_mat0 => 1
            ATTR_quad_inst_mat1 => 2
            ATTR_quad_inst_mat2 => 3
            ATTR_quad_inst_mat3 => 4
            ATTR_quad_color => 5
    Bindings:
*/
ATTR_quad_position :: 0
ATTR_quad_inst_mat0 :: 1
ATTR_quad_inst_mat1 :: 2
ATTR_quad_inst_mat2 :: 3
ATTR_quad_inst_mat3 :: 4
ATTR_quad_color :: 5
/*
    #version 430

    layout(location = 1) in vec4 inst_mat0;
    layout(location = 2) in vec4 inst_mat1;
    layout(location = 3) in vec4 inst_mat2;
    layout(location = 4) in vec4 inst_mat3;
    layout(location = 0) in vec2 position;
    layout(location = 0) out vec4 vs_color;
    layout(location = 5) in vec3 color;

    void main()
    {
        gl_Position = mat4(inst_mat0, inst_mat1, inst_mat2, inst_mat3) * vec4(position, 0.0, 1.0);
        vs_color = vec4(color, 1.0);
    }

*/
@(private="file")
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/*
    #version 430

    layout(location = 0) out vec4 frag_color;
    layout(location = 0) in vec4 vs_color;

    void main()
    {
        frag_color = vs_color;
    }

*/
@(private="file")
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}
/*
    static float4 gl_Position;
    static float4 inst_mat0;
    static float4 inst_mat1;
    static float4 inst_mat2;
    static float4 inst_mat3;
    static float2 position;
    static float4 vs_color;
    static float3 color;

    struct SPIRV_Cross_Input
    {
        float2 position : TEXCOORD0;
        float4 inst_mat0 : TEXCOORD1;
        float4 inst_mat1 : TEXCOORD2;
        float4 inst_mat2 : TEXCOORD3;
        float4 inst_mat3 : TEXCOORD4;
        float3 color : TEXCOORD5;
    };

    struct SPIRV_Cross_Output
    {
        float4 vs_color : TEXCOORD0;
        float4 gl_Position : SV_Position;
    };

    void vert_main()
    {
        gl_Position = mul(float4(position, 0.0f, 1.0f), float4x4(inst_mat0, inst_mat1, inst_mat2, inst_mat3));
        vs_color = float4(color, 1.0f);
    }

    SPIRV_Cross_Output main(SPIRV_Cross_Input stage_input)
    {
        inst_mat0 = stage_input.inst_mat0;
        inst_mat1 = stage_input.inst_mat1;
        inst_mat2 = stage_input.inst_mat2;
        inst_mat3 = stage_input.inst_mat3;
        position = stage_input.position;
        color = stage_input.color;
        vert_main();
        SPIRV_Cross_Output stage_output;
        stage_output.gl_Position = gl_Position;
        stage_output.vs_color = vs_color;
        return stage_output;
    }
*/
@(private="file")
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}
/*
    static float4 frag_color;
    static float4 vs_color;

    struct SPIRV_Cross_Input
    {
        float4 vs_color : TEXCOORD0;
    };

    struct SPIRV_Cross_Output
    {
        float4 frag_color : SV_Target0;
    };

    void frag_main()
    {
        frag_color = vs_color;
    }

    SPIRV_Cross_Output main(SPIRV_Cross_Input stage_input)
    {
        vs_color = stage_input.vs_color;
        frag_main();
        SPIRV_Cross_Output stage_output;
        stage_output.frag_color = frag_color;
        return stage_output;
    }
*/
@(private="file")
fs_source_hlsl5 := [450]u8 {
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}
quad_shader_desc :: proc (backend: sg.Backend) -> sg.Shader_Desc {
    desc: sg.Shader_Desc
    desc.label = "quad_shader"
    #partial switch backend {
    case .GLCORE:
        desc.vertex_func.source = transmute(cstring)&vs_source_glsl430
        desc.vertex_func.entry = "main"
        desc.fragment_func.source = transmute(cstring)&fs_source_glsl430
        desc.fragment_func.entry = "main"
        desc.attrs[0].glsl_name = "position"
        desc.attrs[1].glsl_name = "inst_mat0"
        desc.attrs[2].glsl_name = "inst_mat1"
        desc.attrs[3].glsl_name = "inst_mat2"
        desc.attrs[4].glsl_name = "inst_mat3"
        desc.attrs[5].glsl_name = "color"
    case .D3D11:
        desc.vertex_func.source = transmute(cstring)&vs_source_hlsl5
        desc.vertex_func.d3d11_target = "vs_5_0"
        desc.vertex_func.entry = "main"
        desc.fragment_func.source = transmute(cstring)&fs_source_hlsl5
        desc.fragment_func.d3d11_target = "ps_5_0"
        desc.fragment_func.entry = "main"
        desc.attrs[0].hlsl_sem_name = "TEXCOORD"
        desc.attrs[0].hlsl_sem_index = 0
        desc.attrs[1].hlsl_sem_name = "TEXCOORD"
        desc.attrs[1].hlsl_sem_index = 1
        desc.attrs[2].hlsl_sem_name = "TEXCOORD"
        desc.attrs[2].hlsl_sem_index = 2
        desc.attrs[3].hlsl_sem_name = "TEXCOORD"
        desc.attrs[3].hlsl_sem_index = 3
        desc.attrs[4].hlsl_sem_name = "TEXCOORD"
        desc.attrs[4].hlsl_sem_index = 4
        desc.attrs[5].hlsl_sem_name = "TEXCOORD"
        desc.attrs[5].hlsl_sem_index = 5
    }
    return desc
}