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shader/rescaling_pass: Patch more instructions
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@ -22,6 +22,105 @@ void PatchFragCoord(IR::Block& block, IR::Inst& inst) {
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inst.ReplaceUsesWith(downscaled_frag_coord);
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}
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[[nodiscard]] IR::U32 Scale(IR::IREmitter& ir, const IR::U1& is_scaled, const IR::U32& value) {
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IR::U32 scaled_value{value};
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bool changed{};
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if (const u32 up_scale = Settings::values.resolution_info.up_scale; up_scale != 1) {
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scaled_value = ir.IMul(value, ir.Imm32(up_scale));
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changed = true;
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}
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if (const u32 down_shift = Settings::values.resolution_info.down_shift; down_shift != 0) {
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scaled_value = ir.ShiftRightArithmetic(value, ir.Imm32(down_shift));
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changed = true;
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}
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if (changed) {
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return IR::U32{ir.Select(is_scaled, scaled_value, value)};
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} else {
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return value;
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}
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}
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[[nodiscard]] IR::U32 DownScale(IR::IREmitter& ir, IR::U32 value) {
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if (const u32 down_shift = Settings::values.resolution_info.down_shift; down_shift != 0) {
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value = ir.ShiftLeftLogical(value, ir.Imm32(down_shift));
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}
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if (const u32 up_scale = Settings::values.resolution_info.up_scale; up_scale != 1) {
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value = ir.IDiv(value, ir.Imm32(up_scale));
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}
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return value;
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}
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void PatchImageQueryDimensions(IR::Block& block, IR::Inst& inst) {
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const auto it{IR::Block::InstructionList::s_iterator_to(inst)};
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IR::IREmitter ir{block, IR::Block::InstructionList::s_iterator_to(inst)};
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const auto info{inst.Flags<IR::TextureInstInfo>()};
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switch (info.type) {
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case TextureType::Color1D:
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case TextureType::ColorArray1D: {
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const IR::Value new_inst{&*block.PrependNewInst(it, inst)};
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const IR::U32 width{DownScale(ir, IR::U32{ir.CompositeExtract(new_inst, 0)})};
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const IR::Value replacement{ir.CompositeConstruct(width, ir.CompositeExtract(new_inst, 1),
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ir.CompositeExtract(new_inst, 2),
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ir.CompositeExtract(new_inst, 3))};
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inst.ReplaceUsesWith(replacement);
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break;
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}
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case TextureType::Color2D:
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case TextureType::ColorArray2D: {
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const IR::Value new_inst{&*block.PrependNewInst(it, inst)};
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const IR::U32 width{DownScale(ir, IR::U32{ir.CompositeExtract(new_inst, 0)})};
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const IR::U32 height{DownScale(ir, IR::U32{ir.CompositeExtract(new_inst, 1)})};
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const IR::Value replacement{ir.CompositeConstruct(
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width, height, ir.CompositeExtract(new_inst, 2), ir.CompositeExtract(new_inst, 3))};
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inst.ReplaceUsesWith(replacement);
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break;
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}
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case TextureType::Color3D:
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case TextureType::ColorCube:
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case TextureType::ColorArrayCube:
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case TextureType::Buffer:
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// Nothing to patch here
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break;
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}
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}
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void PatchImageFetch(IR::Block& block, IR::Inst& inst) {
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IR::IREmitter ir{block, IR::Block::InstructionList::s_iterator_to(inst)};
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const auto info{inst.Flags<IR::TextureInstInfo>()};
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const IR::U1 is_scaled{ir.IsTextureScaled(ir.Imm32(info.descriptor_index))};
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const IR::Value coord{inst.Arg(1)};
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switch (info.type) {
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case TextureType::Color1D:
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inst.SetArg(1, Scale(ir, is_scaled, IR::U32{coord}));
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break;
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case TextureType::ColorArray1D: {
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const IR::U32 x{Scale(ir, is_scaled, IR::U32{ir.CompositeExtract(coord, 0)})};
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const IR::U32 y{ir.CompositeExtract(coord, 1)};
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inst.SetArg(1, ir.CompositeConstruct(x, y));
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break;
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}
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case TextureType::Color2D: {
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const IR::U32 x{Scale(ir, is_scaled, IR::U32{ir.CompositeExtract(coord, 0)})};
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const IR::U32 y{Scale(ir, is_scaled, IR::U32{ir.CompositeExtract(coord, 1)})};
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inst.SetArg(1, ir.CompositeConstruct(x, y));
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break;
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}
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case TextureType::ColorArray2D: {
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const IR::U32 x{Scale(ir, is_scaled, IR::U32{ir.CompositeExtract(coord, 0)})};
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const IR::U32 y{Scale(ir, is_scaled, IR::U32{ir.CompositeExtract(coord, 1)})};
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const IR::U32 z{ir.CompositeExtract(coord, 2)};
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inst.SetArg(1, ir.CompositeConstruct(x, y, z));
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break;
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}
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case TextureType::Color3D:
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case TextureType::ColorCube:
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case TextureType::ColorArrayCube:
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case TextureType::Buffer:
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// Nothing to patch here
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break;
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}
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}
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void Visit(const IR::Program& program, IR::Block& block, IR::Inst& inst) {
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const bool is_fragment_shader{program.stage == Stage::Fragment};
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switch (inst.GetOpcode()) {
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@ -40,12 +139,10 @@ void Visit(const IR::Program& program, IR::Block& block, IR::Inst& inst) {
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break;
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}
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case IR::Opcode::ImageQueryDimensions:
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PatchImageQueryDimensions(block, inst);
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break;
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case IR::Opcode::ImageFetch:
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break;
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case IR::Opcode::ImageRead:
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break;
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case IR::Opcode::ImageWrite:
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PatchImageFetch(block, inst);
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break;
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default:
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break;
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