VEFontCache-Odin/backend/sokol/blit_atlas.odin

package ve_sokol
import sg "thirdparty:sokol/gfx"
/*
    #version:1# (machine generated, don't edit!)

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

    Cmdline:
        sokol-shdc --input C:\projects\VEFontCache-Odin\backend\sokol\blit_atlas.shdc.glsl --output C:\projects\VEFontCache-Odin\backend\sokol\blit_atlas.odin --slang glsl410:glsl300es:hlsl4:metal_macos:wgsl --format=sokol_odin --module =blit_atlas

    Overview:
    =========
    Shader program: 'blit_atlas':
        Get shader desc: blit_atlas_shader_desc(sg.query_backend())
        Vertex shader: blit_atlas_vs
            Attributes:
                ATTR_blit_atlas_vs_v_position => 0
                ATTR_blit_atlas_vs_v_texture => 1
        Fragment shader: blit_atlas_fs
            Uniform block 'blit_atlas_fs_params':
                Odin struct: Blit_Atlas_Fs_Params
                Bind slot: SLOT_blit_atlas_fs_params => 0
            Image 'blit_atlas_src_texture':
                Image type: ._2D
                Sample type: .FLOAT
                Multisampled: false
                Bind slot: SLOT_blit_atlas_src_texture => 0
            Sampler 'blit_atlas_src_sampler':
                Type: .FILTERING
                Bind slot: SLOT_blit_atlas_src_sampler => 0
            Image Sampler Pair 'blit_atlas_src_texture_blit_atlas_src_sampler':
                Image: blit_atlas_src_texture
                Sampler: blit_atlas_src_sampler
*/
ATTR_blit_atlas_vs_v_position :: 0
ATTR_blit_atlas_vs_v_texture :: 1
SLOT_blit_atlas_fs_params :: 0
SLOT_blit_atlas_src_texture :: 0
SLOT_blit_atlas_src_sampler :: 0
Blit_Atlas_Fs_Params :: struct #align(16) {
    using _: struct #packed {
        region: i32,
        _: [12]u8,
    },
}
/*
    #version 410

    layout(location = 0) out vec2 uv;
    layout(location = 1) in vec2 v_texture;
    layout(location = 0) in vec2 v_position;

    void main()
    {
        uv = vec2(v_texture.x, 1.0 - v_texture.y);
        gl_Position = vec4(v_position, 0.0, 1.0);
    }

*/
@(private)
blit_atlas_vs_source_glsl410 := [241]u8 {
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    0x00,
}
/*
    #version 410

    uniform ivec4 blit_atlas_fs_params[1];
    uniform sampler2D blit_atlas_src_texture_blit_atlas_src_sampler;

    layout(location = 0) in vec2 uv;
    layout(location = 0) out vec4 frag_color;

    float down_sample(vec2 uv_1, vec2 texture_size)
    {
        return 0.25 * (((texture(blit_atlas_src_texture_blit_atlas_src_sampler, uv_1).x + texture(blit_atlas_src_texture_blit_atlas_src_sampler, fma(vec2(0.0, 1.0), texture_size, uv_1)).x) + texture(blit_atlas_src_texture_blit_atlas_src_sampler, fma(vec2(1.0, 0.0), texture_size, uv_1)).x) + texture(blit_atlas_src_texture_blit_atlas_src_sampler, uv_1 + texture_size).x);
    }

    void main()
    {
        bool _93 = blit_atlas_fs_params[0].x == 0;
        bool _101;
        if (!_93)
        {
            _101 = blit_atlas_fs_params[0].x == 1;
        }
        else
        {
            _101 = _93;
        }
        bool _109;
        if (!_101)
        {
            _109 = blit_atlas_fs_params[0].x == 2;
        }
        else
        {
            _109 = _101;
        }
        if (_109)
        {
            vec2 param = uv + vec2(-0.00048828125, -0.0029296875);
            vec2 param_1 = vec2(0.00048828125, 0.001953125);
            vec2 param_2 = uv + vec2(0.000244140625, -0.0029296875);
            vec2 param_3 = vec2(0.00048828125, 0.001953125);
            vec2 param_4 = uv + vec2(-0.000732421875, 0.0009765625);
            vec2 param_5 = vec2(0.00048828125, 0.001953125);
            vec2 param_6 = uv + vec2(0.000244140625, 0.0009765625);
            vec2 param_7 = vec2(0.00048828125, 0.001953125);
            frag_color = vec4(1.0, 1.0, 1.0, 0.25 * (((down_sample(param, param_1) + down_sample(param_2, param_3)) + down_sample(param_4, param_5)) + down_sample(param_6, param_7)));
        }
        else
        {
            frag_color = vec4(0.0, 0.0, 0.0, 1.0);
        }
    }

*/
@(private)
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}
/*
    #version 300 es

    out vec2 uv;
    layout(location = 1) in vec2 v_texture;
    layout(location = 0) in vec2 v_position;

    void main()
    {
        uv = vec2(v_texture.x, 1.0 - v_texture.y);
        gl_Position = vec4(v_position, 0.0, 1.0);
    }

*/
@(private)
blit_atlas_vs_source_glsl300es := [223]u8 {
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}
/*
    #version 300 es
    precision mediump float;
    precision highp int;

    uniform ivec4 blit_atlas_fs_params[1];
    uniform highp sampler2D blit_atlas_src_texture_blit_atlas_src_sampler;

    in highp vec2 uv;
    layout(location = 0) out highp vec4 frag_color;

    highp float down_sample(highp vec2 uv_1, highp vec2 texture_size)
    {
        return 0.25 * (((texture(blit_atlas_src_texture_blit_atlas_src_sampler, uv_1).x + texture(blit_atlas_src_texture_blit_atlas_src_sampler, vec2(0.0, 1.0) * texture_size + uv_1).x) + texture(blit_atlas_src_texture_blit_atlas_src_sampler, vec2(1.0, 0.0) * texture_size + uv_1).x) + texture(blit_atlas_src_texture_blit_atlas_src_sampler, uv_1 + texture_size).x);
    }

    void main()
    {
        bool _93 = blit_atlas_fs_params[0].x == 0;
        bool _101;
        if (!_93)
        {
            _101 = blit_atlas_fs_params[0].x == 1;
        }
        else
        {
            _101 = _93;
        }
        bool _109;
        if (!_101)
        {
            _109 = blit_atlas_fs_params[0].x == 2;
        }
        else
        {
            _109 = _101;
        }
        if (_109)
        {
            highp vec2 param = uv + vec2(-0.00048828125, -0.0029296875);
            highp vec2 param_1 = vec2(0.00048828125, 0.001953125);
            highp vec2 param_2 = uv + vec2(0.000244140625, -0.0029296875);
            highp vec2 param_3 = vec2(0.00048828125, 0.001953125);
            highp vec2 param_4 = uv + vec2(-0.000732421875, 0.0009765625);
            highp vec2 param_5 = vec2(0.00048828125, 0.001953125);
            highp vec2 param_6 = uv + vec2(0.000244140625, 0.0009765625);
            highp vec2 param_7 = vec2(0.00048828125, 0.001953125);
            frag_color = vec4(1.0, 1.0, 1.0, 0.25 * (((down_sample(param, param_1) + down_sample(param_2, param_3)) + down_sample(param_4, param_5)) + down_sample(param_6, param_7)));
        }
        else
        {
            frag_color = vec4(0.0, 0.0, 0.0, 1.0);
        }
    }

*/
@(private)
blit_atlas_fs_source_glsl300es := [1806]u8 {
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}
/*
    static float4 gl_Position;
    static float2 uv;
    static float2 v_texture;
    static float2 v_position;

    struct SPIRV_Cross_Input
    {
        float2 v_position : TEXCOORD0;
        float2 v_texture : TEXCOORD1;
    };

    struct SPIRV_Cross_Output
    {
        float2 uv : TEXCOORD0;
        float4 gl_Position : SV_Position;
    };

    void vert_main()
    {
        uv = float2(v_texture.x, 1.0f - v_texture.y);
        gl_Position = float4(v_position, 0.0f, 1.0f);
    }

    SPIRV_Cross_Output main(SPIRV_Cross_Input stage_input)
    {
        v_texture = stage_input.v_texture;
        v_position = stage_input.v_position;
        vert_main();
        SPIRV_Cross_Output stage_output;
        stage_output.gl_Position = gl_Position;
        stage_output.uv = uv;
        return stage_output;
    }
*/
@(private)
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}
/*
    cbuffer blit_atlas_fs_params : register(b0)
    {
        int _88_region : packoffset(c0);
    };

    Texture2D<float4> blit_atlas_src_texture : register(t0);
    SamplerState blit_atlas_src_sampler : register(s0);

    static float2 uv;
    static float4 frag_color;

    struct SPIRV_Cross_Input
    {
        float2 uv : TEXCOORD0;
    };

    struct SPIRV_Cross_Output
    {
        float4 frag_color : SV_Target0;
    };

    float down_sample(float2 uv_1, float2 texture_size)
    {
        return 0.25f * (((blit_atlas_src_texture.Sample(blit_atlas_src_sampler, uv_1).x + blit_atlas_src_texture.Sample(blit_atlas_src_sampler, mad(float2(0.0f, 1.0f), texture_size, uv_1)).x) + blit_atlas_src_texture.Sample(blit_atlas_src_sampler, mad(float2(1.0f, 0.0f), texture_size, uv_1)).x) + blit_atlas_src_texture.Sample(blit_atlas_src_sampler, uv_1 + texture_size).x);
    }

    void frag_main()
    {
        bool _93 = _88_region == 0;
        bool _101;
        if (!_93)
        {
            _101 = _88_region == 1;
        }
        else
        {
            _101 = _93;
        }
        bool _109;
        if (!_101)
        {
            _109 = _88_region == 2;
        }
        else
        {
            _109 = _101;
        }
        if (_109)
        {
            float2 param = uv + float2(-0.00048828125f, -0.0029296875f);
            float2 param_1 = float2(0.00048828125f, 0.001953125f);
            float2 param_2 = uv + float2(0.000244140625f, -0.0029296875f);
            float2 param_3 = float2(0.00048828125f, 0.001953125f);
            float2 param_4 = uv + float2(-0.000732421875f, 0.0009765625f);
            float2 param_5 = float2(0.00048828125f, 0.001953125f);
            float2 param_6 = uv + float2(0.000244140625f, 0.0009765625f);
            float2 param_7 = float2(0.00048828125f, 0.001953125f);
            frag_color = float4(1.0f, 1.0f, 1.0f, 0.25f * (((down_sample(param, param_1) + down_sample(param_2, param_3)) + down_sample(param_4, param_5)) + down_sample(param_6, param_7)));
        }
        else
        {
            frag_color = float4(0.0f, 0.0f, 0.0f, 1.0f);
        }
    }

    SPIRV_Cross_Output main(SPIRV_Cross_Input stage_input)
    {
        uv = stage_input.uv;
        frag_main();
        SPIRV_Cross_Output stage_output;
        stage_output.frag_color = frag_color;
        return stage_output;
    }
*/
@(private)
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}
/*
    #include <metal_stdlib>
    #include <simd/simd.h>

    using namespace metal;

    struct main0_out
    {
        float2 uv [[user(locn0)]];
        float4 gl_Position [[position]];
    };

    struct main0_in
    {
        float2 v_position [[attribute(0)]];
        float2 v_texture [[attribute(1)]];
    };

    vertex main0_out main0(main0_in in [[stage_in]])
    {
        main0_out out = {};
        out.uv = float2(in.v_texture.x, 1.0 - in.v_texture.y);
        out.gl_Position = float4(in.v_position, 0.0, 1.0);
        return out;
    }

*/
@(private)
blit_atlas_vs_source_metal_macos := [473]u8 {
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}
/*
    #pragma clang diagnostic ignored "-Wmissing-prototypes"

    #include <metal_stdlib>
    #include <simd/simd.h>

    using namespace metal;

    struct blit_atlas_fs_params
    {
        int region;
    };

    struct main0_out
    {
        float4 frag_color [[color(0)]];
    };

    struct main0_in
    {
        float2 uv [[user(locn0)]];
    };

    static inline __attribute__((always_inline))
    float down_sample(thread const float2& uv, thread const float2& texture_size, texture2d<float> blit_atlas_src_texture, sampler blit_atlas_src_sampler)
    {
        return 0.25 * (((blit_atlas_src_texture.sample(blit_atlas_src_sampler, uv).x + blit_atlas_src_texture.sample(blit_atlas_src_sampler, fma(float2(0.0, 1.0), texture_size, uv)).x) + blit_atlas_src_texture.sample(blit_atlas_src_sampler, fma(float2(1.0, 0.0), texture_size, uv)).x) + blit_atlas_src_texture.sample(blit_atlas_src_sampler, (uv + texture_size)).x);
    }

    fragment main0_out main0(main0_in in [[stage_in]], constant blit_atlas_fs_params& _88 [[buffer(0)]], texture2d<float> blit_atlas_src_texture [[texture(0)]], sampler blit_atlas_src_sampler [[sampler(0)]])
    {
        main0_out out = {};
        bool _93 = _88.region == 0;
        bool _101;
        if (!_93)
        {
            _101 = _88.region == 1;
        }
        else
        {
            _101 = _93;
        }
        bool _109;
        if (!_101)
        {
            _109 = _88.region == 2;
        }
        else
        {
            _109 = _101;
        }
        if (_109)
        {
            float2 param = in.uv + float2(-0.00048828125, -0.0029296875);
            float2 param_1 = float2(0.00048828125, 0.001953125);
            float2 param_2 = in.uv + float2(0.000244140625, -0.0029296875);
            float2 param_3 = float2(0.00048828125, 0.001953125);
            float2 param_4 = in.uv + float2(-0.000732421875, 0.0009765625);
            float2 param_5 = float2(0.00048828125, 0.001953125);
            float2 param_6 = in.uv + float2(0.000244140625, 0.0009765625);
            float2 param_7 = float2(0.00048828125, 0.001953125);
            out.frag_color = float4(1.0, 1.0, 1.0, 0.25 * (((down_sample(param, param_1, blit_atlas_src_texture, blit_atlas_src_sampler) + down_sample(param_2, param_3, blit_atlas_src_texture, blit_atlas_src_sampler)) + down_sample(param_4, param_5, blit_atlas_src_texture, blit_atlas_src_sampler)) + down_sample(param_6, param_7, blit_atlas_src_texture, blit_atlas_src_sampler)));
        }
        else
        {
            out.frag_color = float4(0.0, 0.0, 0.0, 1.0);
        }
        return out;
    }

*/
@(private)
blit_atlas_fs_source_metal_macos := [2373]u8 {
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}
/*
    diagnostic(off, derivative_uniformity);

    var<private> uv : vec2f;

    var<private> v_texture : vec2f;

    var<private> v_position : vec2f;

    var<private> gl_Position : vec4f;

    fn main_1() {
      let x_16 : f32 = v_texture.x;
      let x_20 : f32 = v_texture.y;
      uv = vec2f(x_16, (1.0f - x_20));
      let x_31 : vec2f = v_position;
      gl_Position = vec4f(x_31.x, x_31.y, 0.0f, 1.0f);
      return;
    }

    struct main_out {
      @location(0)
      uv_1 : vec2f,
      @builtin(position)
      gl_Position : vec4f,
    }

    @vertex
    fn main(@location(1) v_texture_param : vec2f, @location(0) v_position_param : vec2f) -> main_out {
      v_texture = v_texture_param;
      v_position = v_position_param;
      main_1();
      return main_out(uv, gl_Position);
    }

*/
@(private)
blit_atlas_vs_source_wgsl := [698]u8 {
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}
/*
    diagnostic(off, derivative_uniformity);

    struct blit_atlas_fs_params {
      /_ @offset(0) _/
      region : i32,
    }

    @group(1) @binding(48) var blit_atlas_src_texture : texture_2d<f32>;

    @group(1) @binding(64) var blit_atlas_src_sampler : sampler;

    @group(0) @binding(4) var<uniform> x_88 : blit_atlas_fs_params;

    var<private> uv_1 : vec2f;

    var<private> frag_color : vec4f;

    fn down_sample_vf2_vf2_(uv : ptr<function, vec2f>, texture_size : ptr<function, vec2f>) -> f32 {
      var down_sample_scale : f32;
      var value : f32;
      down_sample_scale = 0.25f;
      let x_28 : vec2f = *(uv);
      let x_31 : vec2f = *(texture_size);
      let x_35 : vec4f = textureSample(blit_atlas_src_texture, blit_atlas_src_sampler, (x_28 + (vec2f(0.0f, 0.0f) * x_31)));
      let x_39 : f32 = down_sample_scale;
      let x_44 : vec2f = *(uv);
      let x_47 : vec2f = *(texture_size);
      let x_50 : vec4f = textureSample(blit_atlas_src_texture, blit_atlas_src_sampler, (x_44 + (vec2f(0.0f, 1.0f) * x_47)));
      let x_52 : f32 = down_sample_scale;
      let x_58 : vec2f = *(uv);
      let x_60 : vec2f = *(texture_size);
      let x_63 : vec4f = textureSample(blit_atlas_src_texture, blit_atlas_src_sampler, (x_58 + (vec2f(1.0f, 0.0f) * x_60)));
      let x_65 : f32 = down_sample_scale;
      let x_71 : vec2f = *(uv);
      let x_73 : vec2f = *(texture_size);
      let x_76 : vec4f = textureSample(blit_atlas_src_texture, blit_atlas_src_sampler, (x_71 + (vec2f(1.0f, 1.0f) * x_73)));
      let x_78 : f32 = down_sample_scale;
      value = ((((x_35.x * x_39) + (x_50.x * x_52)) + (x_63.x * x_65)) + (x_76.x * x_78));
      let x_81 : f32 = value;
      return x_81;
    }

    const x_123 = vec2f(0.00048828125f, 0.001953125f);

    fn main_1() {
      var down_sample_scale_1 : f32;
      var alpha : f32;
      var param : vec2f;
      var param_1 : vec2f;
      var param_2 : vec2f;
      var param_3 : vec2f;
      var param_4 : vec2f;
      var param_5 : vec2f;
      var param_6 : vec2f;
      var param_7 : vec2f;
      var x_100 : bool;
      var x_101 : bool;
      var x_108 : bool;
      var x_109 : bool;
      let x_92 : i32 = x_88.region;
      let x_93 : bool = (x_92 == 0i);
      x_101 = x_93;
      if (!(x_93)) {
        let x_98 : i32 = x_88.region;
        x_100 = (x_98 == 1i);
        x_101 = x_100;
      }
      x_109 = x_101;
      if (!(x_101)) {
        let x_106 : i32 = x_88.region;
        x_108 = (x_106 == 2i);
        x_109 = x_108;
      }
      if (x_109) {
        down_sample_scale_1 = 0.25f;
        let x_116 : vec2f = uv_1;
        param = (x_116 + vec2f(-0.00048828125f, -0.0029296875f));
        param_1 = x_123;
        let x_126 : f32 = down_sample_vf2_vf2_(&(param), &(param_1));
        let x_127 : f32 = down_sample_scale_1;
        let x_129 : vec2f = uv_1;
        param_2 = (x_129 + vec2f(0.000244140625f, -0.0029296875f));
        param_3 = x_123;
        let x_135 : f32 = down_sample_vf2_vf2_(&(param_2), &(param_3));
        let x_136 : f32 = down_sample_scale_1;
        let x_139 : vec2f = uv_1;
        param_4 = (x_139 + vec2f(-0.000732421875f, 0.0009765625f));
        param_5 = x_123;
        let x_146 : f32 = down_sample_vf2_vf2_(&(param_4), &(param_5));
        let x_147 : f32 = down_sample_scale_1;
        let x_150 : vec2f = uv_1;
        param_6 = (x_150 + vec2f(0.000244140625f, 0.0009765625f));
        param_7 = x_123;
        let x_155 : f32 = down_sample_vf2_vf2_(&(param_6), &(param_7));
        let x_156 : f32 = down_sample_scale_1;
        alpha = ((((x_126 * x_127) + (x_135 * x_136)) + (x_146 * x_147)) + (x_155 * x_156));
        let x_161 : f32 = alpha;
        frag_color = vec4f(1.0f, 1.0f, 1.0f, x_161);
      } else {
        frag_color = vec4f(0.0f, 0.0f, 0.0f, 1.0f);
      }
      return;
    }

    struct main_out {
      @location(0)
      frag_color_1 : vec4f,
    }

    @fragment
    fn main(@location(0) uv_1_param : vec2f) -> main_out {
      uv_1 = uv_1_param;
      main_1();
      return main_out(frag_color);
    }

*/
@(private)
blit_atlas_fs_source_wgsl := [3640]u8 {
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}
blit_atlas_shader_desc :: proc (backend: sg.Backend) -> sg.Shader_Desc {
    desc: sg.Shader_Desc
    desc.label = "blit_atlas_shader"
    #partial switch backend {
    case .GLCORE:
        desc.attrs[0].name = "v_position"
        desc.attrs[1].name = "v_texture"
        desc.vs.source = transmute(cstring)&blit_atlas_vs_source_glsl410
        desc.vs.entry = "main"
        desc.fs.source = transmute(cstring)&blit_atlas_fs_source_glsl410
        desc.fs.entry = "main"
        desc.fs.uniform_blocks[0].size = 16
        desc.fs.uniform_blocks[0].layout = .STD140
        desc.fs.uniform_blocks[0].uniforms[0].name = "blit_atlas_fs_params"
        desc.fs.uniform_blocks[0].uniforms[0].type = .INT4
        desc.fs.uniform_blocks[0].uniforms[0].array_count = 1
        desc.fs.images[0].used = true
        desc.fs.images[0].multisampled = false
        desc.fs.images[0].image_type = ._2D
        desc.fs.images[0].sample_type = .FLOAT
        desc.fs.samplers[0].used = true
        desc.fs.samplers[0].sampler_type = .FILTERING
        desc.fs.image_sampler_pairs[0].used = true
        desc.fs.image_sampler_pairs[0].image_slot = 0
        desc.fs.image_sampler_pairs[0].sampler_slot = 0
        desc.fs.image_sampler_pairs[0].glsl_name = "blit_atlas_src_texture_blit_atlas_src_sampler"
    case .GLES3:
        desc.attrs[0].name = "v_position"
        desc.attrs[1].name = "v_texture"
        desc.vs.source = transmute(cstring)&blit_atlas_vs_source_glsl300es
        desc.vs.entry = "main"
        desc.fs.source = transmute(cstring)&blit_atlas_fs_source_glsl300es
        desc.fs.entry = "main"
        desc.fs.uniform_blocks[0].size = 16
        desc.fs.uniform_blocks[0].layout = .STD140
        desc.fs.uniform_blocks[0].uniforms[0].name = "blit_atlas_fs_params"
        desc.fs.uniform_blocks[0].uniforms[0].type = .INT4
        desc.fs.uniform_blocks[0].uniforms[0].array_count = 1
        desc.fs.images[0].used = true
        desc.fs.images[0].multisampled = false
        desc.fs.images[0].image_type = ._2D
        desc.fs.images[0].sample_type = .FLOAT
        desc.fs.samplers[0].used = true
        desc.fs.samplers[0].sampler_type = .FILTERING
        desc.fs.image_sampler_pairs[0].used = true
        desc.fs.image_sampler_pairs[0].image_slot = 0
        desc.fs.image_sampler_pairs[0].sampler_slot = 0
        desc.fs.image_sampler_pairs[0].glsl_name = "blit_atlas_src_texture_blit_atlas_src_sampler"
    case .D3D11:
        desc.attrs[0].sem_name = "TEXCOORD"
        desc.attrs[0].sem_index = 0
        desc.attrs[1].sem_name = "TEXCOORD"
        desc.attrs[1].sem_index = 1
        desc.vs.source = transmute(cstring)&blit_atlas_vs_source_hlsl4
        desc.vs.d3d11_target = "vs_4_0"
        desc.vs.entry = "main"
        desc.fs.source = transmute(cstring)&blit_atlas_fs_source_hlsl4
        desc.fs.d3d11_target = "ps_4_0"
        desc.fs.entry = "main"
        desc.fs.uniform_blocks[0].size = 16
        desc.fs.uniform_blocks[0].layout = .STD140
        desc.fs.images[0].used = true
        desc.fs.images[0].multisampled = false
        desc.fs.images[0].image_type = ._2D
        desc.fs.images[0].sample_type = .FLOAT
        desc.fs.samplers[0].used = true
        desc.fs.samplers[0].sampler_type = .FILTERING
        desc.fs.image_sampler_pairs[0].used = true
        desc.fs.image_sampler_pairs[0].image_slot = 0
        desc.fs.image_sampler_pairs[0].sampler_slot = 0
    case .METAL_MACOS:
        desc.vs.source = transmute(cstring)&blit_atlas_vs_source_metal_macos
        desc.vs.entry = "main0"
        desc.fs.source = transmute(cstring)&blit_atlas_fs_source_metal_macos
        desc.fs.entry = "main0"
        desc.fs.uniform_blocks[0].size = 16
        desc.fs.uniform_blocks[0].layout = .STD140
        desc.fs.images[0].used = true
        desc.fs.images[0].multisampled = false
        desc.fs.images[0].image_type = ._2D
        desc.fs.images[0].sample_type = .FLOAT
        desc.fs.samplers[0].used = true
        desc.fs.samplers[0].sampler_type = .FILTERING
        desc.fs.image_sampler_pairs[0].used = true
        desc.fs.image_sampler_pairs[0].image_slot = 0
        desc.fs.image_sampler_pairs[0].sampler_slot = 0
    case .WGPU:
        desc.vs.source = transmute(cstring)&blit_atlas_vs_source_wgsl
        desc.vs.entry = "main"
        desc.fs.source = transmute(cstring)&blit_atlas_fs_source_wgsl
        desc.fs.entry = "main"
        desc.fs.uniform_blocks[0].size = 16
        desc.fs.uniform_blocks[0].layout = .STD140
        desc.fs.images[0].used = true
        desc.fs.images[0].multisampled = false
        desc.fs.images[0].image_type = ._2D
        desc.fs.images[0].sample_type = .FLOAT
        desc.fs.samplers[0].used = true
        desc.fs.samplers[0].sampler_type = .FILTERING
        desc.fs.image_sampler_pairs[0].used = true
        desc.fs.image_sampler_pairs[0].image_slot = 0
        desc.fs.image_sampler_pairs[0].sampler_slot = 0
    }
    return desc
}