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compile *.comp with glslang optimizations enabled (-Os) #1117

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compile *.comp with glslang optimizations enabled (-Os) #1117

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27 changes: 25 additions & 2 deletions src/meson.build
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Original file line number Diff line number Diff line change
Expand Up @@ -63,11 +63,34 @@ else
)
endif

# Use --depfile to rebuild shaders when included files have changed. Sadly debian based
# distros don't have up-to-date glslang so we need to check for support first.
glsl_opt_extra_args=['-V', '--quiet']

if (get_option('debug') or get_option('buildtype').contains('debug')) and ( get_option('b_ndebug') != 'true')
glsl_opt_extra_args+=['-gVS'] #compile optimized shaders with debug info (if building w/ debug on), just in case the optimizations cause any weird issues
endif

if run_command(glsl_compiler, ['--version', '--depfile', 'dummy.dep'], check: false).returncode() == 0
glsl_generator_opt = generator(
glsl_compiler,
output : ['@[email protected]'],
arguments : ['@INPUT@', '-Os', '--vn', '@BASENAME@', '-o', '@OUTPUT@', '--depfile', '@DEPFILE@'] + glsl_opt_extra_args,
depfile : '@[email protected]',
)
else
glsl_generator_opt = generator(
glsl_compiler,
output : ['@[email protected]'],
arguments : ['@INPUT@', '-Os', '--vn', '@BASENAME@', '-o', '@OUTPUT@'] + glsl_opt_extra_args,
)
endif

shader_src_dont_opt = [ 'shaders/cs_composite_rcas.comp' ] #gslang optimization flag balloons this specific shader's file size for whatever reason
shader_src = [
'shaders/cs_composite_blit.comp',
'shaders/cs_composite_blur.comp',
'shaders/cs_composite_blur_cond.comp',
'shaders/cs_composite_rcas.comp',
'shaders/cs_easu.comp',
'shaders/cs_easu_fp16.comp',
'shaders/cs_gaussian_blur_horizontal.comp',
Expand All @@ -76,7 +99,7 @@ shader_src = [
'shaders/cs_rgb_to_nv12.comp',
]

spirv_shaders = glsl_generator.process(shader_src)
spirv_shaders = [glsl_generator_opt.process(shader_src), glsl_generator.process(shader_src_dont_opt)]

liftoff_dep = dependency(
'libliftoff',
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