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a57b3f3b74
* Revert "shader_recompiler: Pad number of TES passthrough outputs to fragment inputs if needed" This reverts commit6436063025. * Revert "shader_recompiler: Only forward declared number of vertex inputs. (#4293)" This reverts commit47f5cc1437.
42 lines
1.4 KiB
C++
42 lines
1.4 KiB
C++
// SPDX-FileCopyrightText: Copyright 2026 shadPS4 Emulator Project
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// SPDX-License-Identifier: GPL-2.0-or-later
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#include "shader_recompiler/info.h"
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#include "shader_recompiler/ir/basic_block.h"
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#include "shader_recompiler/ir/ir_emitter.h"
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#include "shader_recompiler/ir/program.h"
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namespace Shader {
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void InjectClipDistanceAttributes(IR::Program& program, RuntimeInfo& runtime_info) {
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auto& info = runtime_info.fs_info;
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if (!info.clip_distance_emulation || program.info.l_stage != LogicalStage::Fragment) {
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return;
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}
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auto* first_block = *program.blocks.begin();
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auto it = std::ranges::find_if(first_block->Instructions(), [](const IR::Inst& inst) {
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return inst.GetOpcode() == IR::Opcode::Prologue;
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});
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ASSERT(it != first_block->end());
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++it;
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ASSERT(it != first_block->end());
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++it;
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IR::IREmitter ir{*first_block, it};
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// We don't know how many clip distances are exported by VS as it is not processed at this point
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// yet. Here is an assumption that we will have not more than 4 of them (while max is 8) to save
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// one attributes export slot.
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const auto attrib = IR::Attribute::Param0 + info.num_inputs;
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for (u32 comp = 0; comp < MaxEmulatedClipDistances; ++comp) {
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const auto attr_read = ir.GetAttribute(attrib, comp);
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const auto cond_id = ir.FPLessThan(attr_read, ir.Imm32(0.0f));
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ir.Discard(cond_id);
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}
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++info.num_inputs;
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}
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} // namespace Shader
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