90 lines
3.5 KiB
Plaintext
90 lines
3.5 KiB
Plaintext
/**
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******************************************************************************
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* Xenia : Xbox 360 Emulator Research Project *
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******************************************************************************
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* Copyright 2022 Ben Vanik. All rights reserved. *
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* Released under the BSD license - see LICENSE in the root for more details. *
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******************************************************************************
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*/
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#include "xesl.xesli"
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#include "amd_language.xesli"
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#if XE_GUEST_OUTPUT_DITHER
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#include "dither_8bpc.xesli"
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#endif // XE_GUEST_OUTPUT_DITHER
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xesl_pushConstants_begin(b0, space0)
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// 16 used by the vertex shader (GLSL push constant offsets are across
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// stages).
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xesl_block_offset_member(16, c0.x, xesl_int2, xe_cas_output_offset)
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// CasSetup const1.x.
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xesl_block_offset_member(24, c0.z, float, xe_cas_sharpness_post_setup)
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xesl_pushConstants_end
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// FIXME(Triang3l): This approach doesn't work for MSL - the texture must be
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// passed explicitly from the entry point's arguments to CasLoad.
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// Forward declaration because CasLoad needs xe_cas_source from the entry point
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// bindings.
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void CasFilter(xesl_function_param_out(float, pixel_r),
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xesl_function_param_out(float, pixel_g),
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xesl_function_param_out(float, pixel_b),
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xesl_uint2 pixel_position, xesl_uint4 const0, xesl_uint4 const1,
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bool no_scaling);
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xesl_entry_outputs_begin
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xesl_entry_output_target(xesl_float4, xe_cas_color, 0)
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xesl_entry_outputs_end_stageInputs_begin
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xesl_entry_stageInputs_end_bindings_begin_pixel
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xesl_pushConstants_binding(buffer(0))
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xesl_entry_binding_next
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xesl_texture(xesl_texture2D, xe_cas_source, set=0, binding=0, t0, space0,
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texture(0))
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xesl_entry_bindings_end_inputs_begin
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xesl_entry_input_fragCoord
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xesl_entry_inputs_end_code_begin
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xesl_uint2 pixel_coord =
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xesl_uint2(xesl_int2(xesl_FragCoord.xy) -
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xesl_pushConstant(xe_cas_output_offset));
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// CasSetup with smaller push constants usage.
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xesl_uint4 cas_const_0 =
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xesl_floatBitsToUint(xesl_float4(1.0, 1.0, 0.0, 0.0));
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xesl_uint4 cas_const_1 =
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xesl_uint4(
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xesl_floatBitsToUint(xesl_pushConstant(xe_cas_sharpness_post_setup)),
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xesl_packHalf2x16(xesl_float2(
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xesl_pushConstant(xe_cas_sharpness_post_setup), 0.0)),
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xesl_floatBitsToUint(8.0), 0u);
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xesl_float4 cas_color;
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CasFilter(cas_color.r, cas_color.g, cas_color.b, pixel_coord, cas_const_0,
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cas_const_1, true);
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// Linear conversion approximation as recommended in the CAS presentation.
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cas_color.rgb = sqrt(cas_color.rgb);
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#if XE_GUEST_OUTPUT_DITHER
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// Clamping because on Vulkan, the surface may specify any format, including
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// floating-point.
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cas_color.rgb =
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xesl_saturate(cas_color.rgb + XeDitherOffset8bpc(pixel_coord));
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#endif // XE_GUEST_OUTPUT_DITHER
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// Force alpha to 1 to make sure the surface won't be translucent.
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cas_color.a = 1.0;
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xesl_Output(xe_cas_color) = cas_color;
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xesl_entry_code_end
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#define A_GPU 1
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#include "../../../../third_party/FidelityFX-CAS/ffx-cas/ffx_a.h"
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xesl_float3 CasLoad(xesl_int2 p) {
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return xesl_texelFetch2D(xe_cas_source, p, 0).rgb;
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}
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void CasInput(xesl_function_param_inout(float, r),
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xesl_function_param_inout(float, g),
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xesl_function_param_inout(float, b)) {
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// Linear conversion approximation as recommended in the CAS presentation.
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r *= r;
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g *= g;
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b *= b;
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}
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#include "../../../../third_party/FidelityFX-CAS/ffx-cas/ffx_cas.h"
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