QSB Manual

Usage: qsb [options] file
Qt Shader Baker (using QShader from Qt 6.5.0)

Options:
  -?, -h, --help               Displays help on commandline options.
  --help-all                   Displays help including Qt specific options.
  -v, --version                Displays version information.
  -b, --batchable              Also generates rewritten vertex shader for Qt
                               Quick scene graph batching.
  --zorder-loc <location>      The extra vertex input location when rewriting
                               for batching. Defaults to 7.
  --glsl <versions>            Comma separated list of GLSL versions to
                               generate. (for example, "100 es,120,330")
  --hlsl <versions>            Comma separated list of HLSL (Shader Model)
                               versions to generate. F.ex. 50 is 5.0, 51 is 5.1.
  --msl <versions>             Comma separated list of Metal Shading Language
                               versions to generate. F.ex. 12 is 1.2, 20 is 2.0.
  --msltess                    Indicates that a vertex shader is going to be
                               used in a pipeline with tessellation. Mandatory
                               for vertex shaders planned to be used with
                               tessellation when targeting Metal (--msl).
  --tess-vertex-count <count>  The output vertex count from the tessellation
                               control stage. Mandatory for tessellation
                               evaluation shaders planned to be used with Metal.
                               The default value is 3. If it does not match the
                               tess.control stage, the generated MSL code will
                               not function as expected.
  --tess-mode <mode>           The tessellation mode: triangles or quads.
                               Mandatory for tessellation control shaders
                               planned to be used with Metal. The default value
                               is triangles. Isolines are not supported with
                               Metal. If it does not match the tess.evaluation
                               stage, the generated MSL code will not function
                               as expected.
  -g                           Generate full debug info for SPIR-V and DXBC
  -O                           Invoke spirv-opt (external tool) to optimize
                               SPIR-V for performance.
  -o, --output <filename>      Output file for the shader pack.
  -c, --fxc                    In combination with --hlsl invokes fxc to store
                               DXBC instead of HLSL.
  -t, --metallib               In combination with --msl builds a Metal library
                               with xcrun metal(lib) and stores that instead of
                               the source. Suitable only when targeting macOS,
                               not iOS.
  -T, --metallib-ios           In combination with --msl builds a Metal library
                               with xcrun metal(lib) and stores that instead of
                               the source. Suitable only when targeting iOS, not
                               macOS.
  -D, --define <name[=value]>  Define macro. This argument can be specified
                               multiple times.
  -p, --per-target             Enable per-target compilation. (instead of
                               source->SPIRV->targets, do source->SPIRV->target
                               separately for each target)
  -d, --dump                   Switches to dump mode. Input file is expected to
                               be a shader pack.
  -x, --extract <what>         Switches to extract mode. Input file is expected
                               to be a shader pack. Result is written to the
                               output specified by -o. Pass -b to choose the
                               batchable variant.
                               <what>=reflect|spirv,<version>|glsl,<version>|...
  -r, --replace <what>         Switches to replace mode. Replaces the specified
                               shader in the shader pack with the contents of a
                               file. This argument can be specified multiple
                               times. Pass -b to choose the batchable variant.
                               Also supports adding a shader for a
                               target/variant that was not present before.
                               <what>=<target>,<filename> where
                               <target>=spirv,<version>|glsl,<version>|...
  -e, --erase <what>           Switches to erase mode. Removes the specified
                               shader from the shader pack. Pass -b to choose
                               the batchable variant.
                               <what>=spirv,<version>|glsl,<version>|...
  -s, --silent                 Enables silent mode. Only fatal errors will be
                               printed.

Arguments:
  file                         Vulkan GLSL source file to compile. The file
                               extension determines the shader stage, and can be
                               one of .vert, .tesc, .tese, .frag, .comp. Note:
                               Tessellation control/evaluation is not supported
                               with HLSL, instead use -r to inject handcrafted
                               hull/domain shaders. Some targets may need
                               special arguments to be set, e.g. MSL
                               tessellation will likely need --msltess,
                               --tess-vertex-count, --tess-mode, depending on
                               the stage.

#version 440

layout(location = 0) in vec2 v_texcoord;
layout(location = 0) out vec4 fragColor;
layout(binding = 1) uniform sampler2D tex;

layout(std140, binding = 0) uniform buf {
    float uAlpha;
};

void main()
{
    vec4 c = texture(tex, v_texcoord);
    fragColor = vec4(c.rgb, uAlpha);
}

Stage: Fragment
QSB_VERSION: 5
Has 1 shaders: (unordered list)
  Shader 0: SPIR-V 100 [Standard]

Reflection info: {
    "combinedImageSamplers": [
        {
            "binding": 1,
            "name": "tex",
            "set": 0,
            "type": "sampler2D"
        }
    ],
    "inputs": [
        {
            "location": 0,
            "name": "v_texcoord",
            "type": "vec2"
        }
    ],
    "localSize": [
        0,
        0,
        0
    ],
    "outputs": [
        {
            "location": 0,
            "name": "fragColor",
            "type": "vec4"
        }
    ],
    "uniformBlocks": [
        {
            "binding": 0,
            "blockName": "buf",
            "members": [
                {
                    "name": "uAlpha",
                    "offset": 0,
                    "size": 4,
                    "type": "float"
                }
            ],
            "set": 0,
            "size": 4,
            "structName": "_27"
        }
    ]
}


Shader 0: SPIR-V 100 [Standard]
Entry point: main
Contents:
Binary of 864 bytes

qsb --glsl "100 es,120,150" --hlsl 50 --msl 12 -o shader.frag.qsb shader.frag

Stage: Fragment
QSB_VERSION: 5
Has 6 shaders: (unordered list)
  Shader 0: GLSL 120 [Standard]
  Shader 1: HLSL 50 [Standard]
  Shader 2: GLSL 100 es [Standard]
  Shader 3: MSL 12 [Standard]
  Shader 4: SPIR-V 100 [Standard]
  Shader 5: GLSL 150 [Standard]

Reflection info: {
    ... <same as above>
}


Shader 0: GLSL 120 [Standard]
Entry point: main
Contents:
#version 120

struct buf
{
    float uAlpha;
};

uniform buf _27;

uniform sampler2D tex;

varying vec2 v_texcoord;

void main()
{
    vec4 c = texture2D(tex, v_texcoord);
    gl_FragData[0] = vec4(c.xyz, _27.uAlpha);
}

************************************

Shader 1: HLSL 50 [Standard]
Entry point: main
Native resource binding map:
0 -> [0, -1]
1 -> [0, 0]
Contents:
cbuffer buf : register(b0)
{
    float _27_uAlpha : packoffset(c0);
};

Texture2D<float4> tex : register(t0);
SamplerState _tex_sampler : register(s0);

static float2 v_texcoord;
static float4 fragColor;

struct SPIRV_Cross_Input
{
    float2 v_texcoord : TEXCOORD0;
};

struct SPIRV_Cross_Output
{
    float4 fragColor : SV_Target0;
};

void frag_main()
{
    float4 c = tex.Sample(_tex_sampler, v_texcoord);
    fragColor = float4(c.xyz, _27_uAlpha);
}

SPIRV_Cross_Output main(SPIRV_Cross_Input stage_input)
{
    v_texcoord = stage_input.v_texcoord;
    frag_main();
    SPIRV_Cross_Output stage_output;
    stage_output.fragColor = fragColor;
    return stage_output;
}

************************************

...

Shader 3: MSL 12 [Standard]
Entry point: main0
Native resource binding map:
0 -> [0, -1]
1 -> [0, 0]
Contents:
#include <metal_stdlib>
#include <simd/simd.h>

using namespace metal;

struct buf
{
    float uAlpha;
};

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

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

fragment main0_out main0(main0_in in [[stage_in]], constant buf& _27 [[buffer(0)]], texture2d<float> tex [[texture(0)]], sampler texSmplr [[sampler(0)]])
{
    main0_out out = {};
    float4 c = tex.sample(texSmplr, in.v_texcoord);
    out.fragColor = float4(c.xyz, _27.uAlpha);
    return out;
}

************************************

...

Native resource binding map:
 0 -> [0, -1]
 1 -> [0, 0]

#version 440
layout(location = 0) in vec4 position;
layout(location = 1) in vec2 texcoord;
layout(location = 0) out vec2 v_texcoord;
layout(std140, binding = 0) uniform buf {
    mat4 mvp;
} ubuf;
out gl_PerVertex { vec4 gl_Position; };

void main()
{
    v_texcoord = texcoord;
    gl_Position = ubuf.mvp * position;
}

Stage: Vertex
QSB_VERSION: 5
Has 4 shaders: (unordered list)
  Shader 0: GLSL 330 [Standard]
  Shader 1: GLSL 330 [Batchable]
  Shader 2: SPIR-V 100 [Standard]
  Shader 3: SPIR-V 100 [Batchable]

Reflection info: {
  ...

#version 440

layout(location = 0) in vec2 texCoord;
layout(location = 0) out vec4 fragColor;

layout(std140, binding = 0) uniform buf {
    float opacity;
} ubuf;

layout(binding = 1) uniform sampler2D tex;

void main()
{
    fragColor = texture(tex, texCoord).rgba * ubuf.opacity;
}

precision highp float;
#extension GL_OES_EGL_image_external : require
varying vec2 texCoord;

struct buf
{
    float opacity;
};

uniform buf ubuf;
uniform samplerExternalOES tex;

void main()
{
    gl_FragColor = texture2D(tex, texCoord).rgba * ubuf.opacity;
}