By Neil Roberts. A short presentation of VkRunner which is a tool to help create tests using shaders on Vulkan with a simple script to verify the results. X.Org Developer's Conference (XDC) 2018 26th, 27th and 28th of September A Coruña, Spain https://www.x.org/wiki/Events/XDC2018/

1. VkRunnerA simple shader script tester for Vulkan
Neil Roberts

2. • Based on Piglit’s shader_runner
• Quickly test running a shader on
your Vulkan driver without having to
write any boilerplate code
• Simple domain-specific language to
specify inputs to the shader and verify
the output

3. [vertex shader passthrough]
[fragment shader]
#version 430
layout(location = 0) out vec4 color;
void
main()
{
if (gl_FragCoord.x < 83.33333)
color = vec4(1.0, 0.0, 0.0, 1.0);
else if (gl_FragCoord.x < 166.66666)
color = vec4(1.0, 1.0, 1.0, 1.0);
else
color = vec4(0.0, 0.0, 1.0, 1.0);
}
[test]
draw rect -1 -1 2 2
probe rect rgba (1, 0, 81, 250) (1, 0, 0, 1)
probe rect rgba (85, 0, 81, 250) (1, 1, 1, 1)
probe rect rgba (168, 0, 81, 250) (0, 0, 1, 1)
specify your shaders
high-level drawing command
probe the
results

4. • Standalone executable or library to
integrate into another framework
• Vertex, tessellation, geometry,
fragment and compute shaders
• Specify in GLSL or SPIR-V dissassembly.
Compiled on the fly for quick testing
• Or precompile scripts to binary to run
on platforms without the compiler
• Push constants, UBOs, SSBOs, vertex
data

5. Thanks
github.com/igalia/vkrunner