63 lines
2.6 KiB
Plaintext
63 lines
2.6 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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#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_bilinear_output_offset)
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xesl_block_offset_member(24, c0.z, xesl_float2, xe_bilinear_output_size_inv)
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xesl_pushConstants_end
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xesl_entry_outputs_begin
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xesl_entry_output_target(xesl_float4, xe_bilinear_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_bilinear_source, set=0, binding=0, t0, space0,
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texture(0))
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xesl_entry_binding_next
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xesl_samplerState(xe_bilinear_sampler, set=0, binding=1, s0, space0,
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sampler(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_bilinear_output_offset));
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xesl_float4 bilinear_color;
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// + 0.5 so the origin is at the pixel center, and at 1:1 the original pixel
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// is taken.
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// Interpolating the four colors in the perceptual space because doing it in
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// linear space causes, in particular, bright text on a dark background to
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// become too thick, and aliasing of bright parts on top of dark areas to be
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// too apparent (4D5307E6 HUD, for example, mainly the edges of the
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// multiplayer score bars).
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bilinear_color.rgb =
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xesl_textureSampleLod2D_sep(
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xe_bilinear_source, xe_bilinear_sampler,
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(xesl_float2(pixel_coord) + 0.5) *
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xesl_pushConstant(xe_bilinear_output_size_inv),
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0.0).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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bilinear_color.rgb =
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xesl_saturate(bilinear_color.rgb + XeDitherOffset8bpc(pixel_coord));
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#endif // XE_GUEST_OUTPUT_DITHER
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bilinear_color.a = 1.0;
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xesl_Output(xe_bilinear_color) = bilinear_color;
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xesl_entry_code_end
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