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metaforce/aurora/lib/gfx/gx_shader.cpp

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#include "common.hpp"
#include "../gpu.hpp"
#include "gx.hpp"
#include <absl/container/flat_hash_map.h>
namespace aurora::gfx::gx {
using namespace fmt::literals;
static logvisor::Module Log("aurora::gfx::gx");
absl::flat_hash_map<ShaderRef, std::pair<wgpu::ShaderModule, gx::ShaderInfo>> g_gxCachedShaders;
#ifndef NDEBUG
static absl::flat_hash_map<ShaderRef, gx::ShaderConfig> g_gxCachedShaderConfigs;
#endif
static std::string color_arg_reg(GX::TevColorArg arg, size_t stageIdx, const TevStage& stage, ShaderInfo& info) {
switch (arg) {
case GX::CC_CPREV:
return "prev.rgb";
case GX::CC_APREV:
return "prev.a";
case GX::CC_C0:
info.usesTevReg.set(0);
return "tevreg0.rgb";
case GX::CC_A0:
info.usesTevReg.set(0);
return "tevreg0.a";
case GX::CC_C1:
info.usesTevReg.set(1);
return "tevreg1.rgb";
case GX::CC_A1:
info.usesTevReg.set(1);
return "tevreg1.a";
case GX::CC_C2:
info.usesTevReg.set(2);
return "tevreg2.rgb";
case GX::CC_A2:
info.usesTevReg.set(2);
return "tevreg2.a";
case GX::CC_TEXC: {
if (stage.texMapId == GX::TEXMAP_NULL) {
Log.report(logvisor::Fatal, FMT_STRING("unmapped texture for stage {}"), stageIdx);
unreachable();
} else if (stage.texMapId < GX::TEXMAP0 || stage.texMapId > GX::TEXMAP7) {
Log.report(logvisor::Fatal, FMT_STRING("invalid texture {} for stage {}"), stage.texMapId, stageIdx);
unreachable();
}
info.sampledTextures.set(stage.texMapId);
return fmt::format(FMT_STRING("sampled{}.rgb"), stage.texMapId);
}
case GX::CC_TEXA: {
if (stage.texMapId == GX::TEXMAP_NULL) {
Log.report(logvisor::Fatal, FMT_STRING("unmapped texture for stage {}"), stageIdx);
unreachable();
} else if (stage.texMapId < GX::TEXMAP0 || stage.texMapId > GX::TEXMAP7) {
Log.report(logvisor::Fatal, FMT_STRING("invalid texture {} for stage {}"), stage.texMapId, stageIdx);
unreachable();
}
info.sampledTextures.set(stage.texMapId);
return fmt::format(FMT_STRING("sampled{}.a"), stage.texMapId);
}
case GX::CC_RASC: {
if (stage.channelId == GX::COLOR_NULL) {
Log.report(logvisor::Fatal, FMT_STRING("unmapped color channel for stage {}"), stageIdx);
unreachable();
} else if (stage.channelId < GX::COLOR0A0 || stage.channelId > GX::COLOR1A1) {
Log.report(logvisor::Fatal, FMT_STRING("invalid color channel {} for stage {}"), stage.channelId, stageIdx);
unreachable();
}
u32 idx = stage.channelId - GX::COLOR0A0;
info.sampledColorChannels.set(idx);
return fmt::format(FMT_STRING("rast{}.rgb"), idx);
}
case GX::CC_RASA: {
if (stage.channelId == GX::COLOR_NULL) {
Log.report(logvisor::Fatal, FMT_STRING("unmapped color channel for stage {}"), stageIdx);
unreachable();
} else if (stage.channelId < GX::COLOR0A0 || stage.channelId > GX::COLOR1A1) {
Log.report(logvisor::Fatal, FMT_STRING("invalid color channel {} for stage {}"), stage.channelId, stageIdx);
unreachable();
}
u32 idx = stage.channelId - GX::COLOR0A0;
info.sampledColorChannels.set(idx);
return fmt::format(FMT_STRING("rast{}.a"), idx);
}
case GX::CC_ONE:
return "1.0";
case GX::CC_HALF:
return "0.5";
case GX::CC_KONST: {
switch (stage.kcSel) {
case GX::TEV_KCSEL_8_8:
return "1.0";
case GX::TEV_KCSEL_7_8:
return "(7.0/8.0)";
case GX::TEV_KCSEL_6_8:
return "(6.0/8.0)";
case GX::TEV_KCSEL_5_8:
return "(5.0/8.0)";
case GX::TEV_KCSEL_4_8:
return "(4.0/8.0)";
case GX::TEV_KCSEL_3_8:
return "(3.0/8.0)";
case GX::TEV_KCSEL_2_8:
return "(2.0/8.0)";
case GX::TEV_KCSEL_1_8:
return "(1.0/8.0)";
case GX::TEV_KCSEL_K0:
info.sampledKColors.set(0);
return "ubuf.kcolor0.rgb";
case GX::TEV_KCSEL_K1:
info.sampledKColors.set(1);
return "ubuf.kcolor1.rgb";
case GX::TEV_KCSEL_K2:
info.sampledKColors.set(2);
return "ubuf.kcolor2.rgb";
case GX::TEV_KCSEL_K3:
info.sampledKColors.set(3);
return "ubuf.kcolor3.rgb";
case GX::TEV_KCSEL_K0_R:
info.sampledKColors.set(0);
return "ubuf.kcolor0.r";
case GX::TEV_KCSEL_K1_R:
info.sampledKColors.set(1);
return "ubuf.kcolor1.r";
case GX::TEV_KCSEL_K2_R:
info.sampledKColors.set(2);
return "ubuf.kcolor2.r";
case GX::TEV_KCSEL_K3_R:
info.sampledKColors.set(3);
return "ubuf.kcolor3.r";
case GX::TEV_KCSEL_K0_G:
info.sampledKColors.set(0);
return "ubuf.kcolor0.g";
case GX::TEV_KCSEL_K1_G:
info.sampledKColors.set(1);
return "ubuf.kcolor1.g";
case GX::TEV_KCSEL_K2_G:
info.sampledKColors.set(2);
return "ubuf.kcolor2.g";
case GX::TEV_KCSEL_K3_G:
info.sampledKColors.set(3);
return "ubuf.kcolor3.g";
case GX::TEV_KCSEL_K0_B:
info.sampledKColors.set(0);
return "ubuf.kcolor0.b";
case GX::TEV_KCSEL_K1_B:
info.sampledKColors.set(1);
return "ubuf.kcolor1.b";
case GX::TEV_KCSEL_K2_B:
info.sampledKColors.set(2);
return "ubuf.kcolor2.b";
case GX::TEV_KCSEL_K3_B:
info.sampledKColors.set(3);
return "ubuf.kcolor3.b";
case GX::TEV_KCSEL_K0_A:
info.sampledKColors.set(0);
return "ubuf.kcolor0.a";
case GX::TEV_KCSEL_K1_A:
info.sampledKColors.set(1);
return "ubuf.kcolor1.a";
case GX::TEV_KCSEL_K2_A:
info.sampledKColors.set(2);
return "ubuf.kcolor2.a";
case GX::TEV_KCSEL_K3_A:
info.sampledKColors.set(3);
return "ubuf.kcolor3.a";
default:
Log.report(logvisor::Fatal, FMT_STRING("invalid kcSel {}"), stage.kcSel);
unreachable();
}
}
case GX::CC_ZERO:
return "0.0";
default:
Log.report(logvisor::Fatal, FMT_STRING("invalid color arg {}"), arg);
unreachable();
}
}
static std::string alpha_arg_reg(GX::TevAlphaArg arg, size_t stageIdx, const TevStage& stage, ShaderInfo& info) {
switch (arg) {
case GX::CA_APREV:
return "prev.a";
case GX::CA_A0:
info.usesTevReg.set(0);
return "tevreg0.a";
case GX::CA_A1:
info.usesTevReg.set(1);
return "tevreg1.a";
case GX::CA_A2:
info.usesTevReg.set(2);
return "tevreg2.a";
case GX::CA_TEXA: {
if (stage.texMapId == GX::TEXMAP_NULL) {
Log.report(logvisor::Fatal, FMT_STRING("unmapped texture for stage {}"), stageIdx);
unreachable();
} else if (stage.texMapId < GX::TEXMAP0 || stage.texMapId > GX::TEXMAP7) {
Log.report(logvisor::Fatal, FMT_STRING("invalid texture {} for stage {}"), stage.texMapId, stageIdx);
unreachable();
}
info.sampledTextures.set(stage.texMapId);
return fmt::format(FMT_STRING("sampled{}.a"), stage.texMapId);
}
case GX::CA_RASA: {
if (stage.channelId == GX::COLOR_NULL) {
Log.report(logvisor::Fatal, FMT_STRING("unmapped color channel for stage {}"), stageIdx);
unreachable();
} else if (stage.channelId < GX::COLOR0A0 || stage.channelId > GX::COLOR1A1) {
Log.report(logvisor::Fatal, FMT_STRING("invalid color channel {} for stage {}"), stage.channelId, stageIdx);
unreachable();
}
u32 idx = stage.channelId - GX::COLOR0A0;
info.sampledColorChannels.set(idx);
return fmt::format(FMT_STRING("rast{}.a"), idx);
}
case GX::CA_KONST: {
switch (stage.kaSel) {
case GX::TEV_KASEL_8_8:
return "1.0";
case GX::TEV_KASEL_7_8:
return "(7.0/8.0)";
case GX::TEV_KASEL_6_8:
return "(6.0/8.0)";
case GX::TEV_KASEL_5_8:
return "(5.0/8.0)";
case GX::TEV_KASEL_4_8:
return "(4.0/8.0)";
case GX::TEV_KASEL_3_8:
return "(3.0/8.0)";
case GX::TEV_KASEL_2_8:
return "(2.0/8.0)";
case GX::TEV_KASEL_1_8:
return "(1.0/8.0)";
case GX::TEV_KASEL_K0_R:
info.sampledKColors.set(0);
return "ubuf.kcolor0.r";
case GX::TEV_KASEL_K1_R:
info.sampledKColors.set(1);
return "ubuf.kcolor1.r";
case GX::TEV_KASEL_K2_R:
info.sampledKColors.set(2);
return "ubuf.kcolor2.r";
case GX::TEV_KASEL_K3_R:
info.sampledKColors.set(3);
return "ubuf.kcolor3.r";
case GX::TEV_KASEL_K0_G:
info.sampledKColors.set(0);
return "ubuf.kcolor0.g";
case GX::TEV_KASEL_K1_G:
info.sampledKColors.set(1);
return "ubuf.kcolor1.g";
case GX::TEV_KASEL_K2_G:
info.sampledKColors.set(2);
return "ubuf.kcolor2.g";
case GX::TEV_KASEL_K3_G:
info.sampledKColors.set(3);
return "ubuf.kcolor3.g";
case GX::TEV_KASEL_K0_B:
info.sampledKColors.set(0);
return "ubuf.kcolor0.b";
case GX::TEV_KASEL_K1_B:
info.sampledKColors.set(1);
return "ubuf.kcolor1.b";
case GX::TEV_KASEL_K2_B:
info.sampledKColors.set(2);
return "ubuf.kcolor2.b";
case GX::TEV_KASEL_K3_B:
info.sampledKColors.set(3);
return "ubuf.kcolor3.b";
case GX::TEV_KASEL_K0_A:
info.sampledKColors.set(0);
return "ubuf.kcolor0.a";
case GX::TEV_KASEL_K1_A:
info.sampledKColors.set(1);
return "ubuf.kcolor1.a";
case GX::TEV_KASEL_K2_A:
info.sampledKColors.set(2);
return "ubuf.kcolor2.a";
case GX::TEV_KASEL_K3_A:
info.sampledKColors.set(3);
return "ubuf.kcolor3.a";
default:
Log.report(logvisor::Fatal, FMT_STRING("invalid kaSel {}"), stage.kaSel);
unreachable();
}
}
case GX::CA_ZERO:
return "0.0";
default:
Log.report(logvisor::Fatal, FMT_STRING("invalid alpha arg {}"), arg);
unreachable();
}
}
static std::string_view tev_op(GX::TevOp op) {
switch (op) {
case GX::TEV_ADD:
return "+";
case GX::TEV_SUB:
return "-";
default:
Log.report(logvisor::Fatal, FMT_STRING("TODO {}"), op);
unreachable();
}
}
static std::string_view tev_bias(GX::TevBias bias) {
switch (bias) {
case GX::TB_ZERO:
return " + 0.0";
case GX::TB_ADDHALF:
return " + 0.5";
case GX::TB_SUBHALF:
return " - 0.5";
default:
Log.report(logvisor::Fatal, FMT_STRING("invalid bias {}"), bias);
unreachable();
}
}
static std::string_view tev_scale(GX::TevScale scale) {
switch (scale) {
case GX::CS_SCALE_1:
return " * 1.0";
case GX::CS_SCALE_2:
return " * 2.0";
case GX::CS_SCALE_4:
return " * 4.0";
case GX::CS_DIVIDE_2:
return " / 2.0";
default:
Log.report(logvisor::Fatal, FMT_STRING("invalid scale {}"), scale);
unreachable();
}
}
static std::string in_uv(u32 idx) {
if (idx == 0) {
return "v_packed_uvs.data[in_uv_0_4_idx[0]]";
}
if (idx < 4) {
return fmt::format(FMT_STRING("v_uvs.data[in_uv_0_4_idx[{}]]"), idx);
}
return fmt::format(FMT_STRING("v_uvs.data[in_uv_5_7_idx[{}]]"), idx - 4);
}
std::pair<wgpu::ShaderModule, ShaderInfo> build_shader(const ShaderConfig& config) noexcept {
const auto hash = xxh3_hash(config);
const auto it = g_gxCachedShaders.find(hash);
if (it != g_gxCachedShaders.end()) {
#ifndef NDEBUG
if (g_gxCachedShaderConfigs[hash] != config) {
Log.report(logvisor::Fatal, FMT_STRING("Shader collision!"));
unreachable();
}
#endif
return it->second;
}
Log.report(logvisor::Info, FMT_STRING("Shader config (hash {:x}):"), hash);
ShaderInfo info{
.uniformSize = 64 * 3, // mv, mvInv, proj
};
{
for (int i = 0; i < config.tevStages.size(); ++i) {
const auto& stage = config.tevStages[i];
if (!stage) {
break;
}
Log.report(logvisor::Info, FMT_STRING(" tevStages[{}]:"), i);
Log.report(logvisor::Info, FMT_STRING(" color_a: {}"), stage->colorPass.a);
Log.report(logvisor::Info, FMT_STRING(" color_b: {}"), stage->colorPass.b);
Log.report(logvisor::Info, FMT_STRING(" color_c: {}"), stage->colorPass.c);
Log.report(logvisor::Info, FMT_STRING(" color_d: {}"), stage->colorPass.d);
Log.report(logvisor::Info, FMT_STRING(" alpha_a: {}"), stage->alphaPass.a);
Log.report(logvisor::Info, FMT_STRING(" alpha_b: {}"), stage->alphaPass.b);
Log.report(logvisor::Info, FMT_STRING(" alpha_c: {}"), stage->alphaPass.c);
Log.report(logvisor::Info, FMT_STRING(" alpha_d: {}"), stage->alphaPass.d);
Log.report(logvisor::Info, FMT_STRING(" color_op_clamp: {}"), stage->colorOp.clamp);
Log.report(logvisor::Info, FMT_STRING(" color_op_op: {}"), stage->colorOp.op);
Log.report(logvisor::Info, FMT_STRING(" color_op_bias: {}"), stage->colorOp.bias);
Log.report(logvisor::Info, FMT_STRING(" color_op_scale: {}"), stage->colorOp.scale);
Log.report(logvisor::Info, FMT_STRING(" color_op_reg_id: {}"), stage->colorOp.outReg);
Log.report(logvisor::Info, FMT_STRING(" alpha_op_clamp: {}"), stage->alphaOp.clamp);
Log.report(logvisor::Info, FMT_STRING(" alpha_op_op: {}"), stage->alphaOp.op);
Log.report(logvisor::Info, FMT_STRING(" alpha_op_bias: {}"), stage->alphaOp.bias);
Log.report(logvisor::Info, FMT_STRING(" alpha_op_scale: {}"), stage->alphaOp.scale);
Log.report(logvisor::Info, FMT_STRING(" alpha_op_reg_id: {}"), stage->alphaOp.outReg);
Log.report(logvisor::Info, FMT_STRING(" kc_sel: {}"), stage->kcSel);
Log.report(logvisor::Info, FMT_STRING(" ka_sel: {}"), stage->kaSel);
Log.report(logvisor::Info, FMT_STRING(" texCoordId: {}"), stage->texCoordId);
Log.report(logvisor::Info, FMT_STRING(" texMapId: {}"), stage->texMapId);
Log.report(logvisor::Info, FMT_STRING(" channelId: {}"), stage->channelId);
}
for (int i = 0; i < config.colorChannels.size(); ++i) {
const auto& chan = config.colorChannels[i];
Log.report(logvisor::Info, FMT_STRING(" colorChannels[{}]: enabled {} mat {} amb {}"), i, chan.lightingEnabled,
chan.matSrc, chan.ambSrc);
}
for (int i = 0; i < config.tcgs.size(); ++i) {
const auto& tcg = config.tcgs[i];
if (tcg.src != GX::MAX_TEXGENSRC) {
Log.report(logvisor::Info, FMT_STRING(" tcg[{}]: src {} mtx {} post {} type {} norm {}"), i, tcg.src, tcg.mtx,
tcg.postMtx, tcg.type, tcg.normalize);
}
}
Log.report(logvisor::Info, FMT_STRING(" alphaDiscard: {}"), config.alphaDiscard.value_or(0.f));
Log.report(logvisor::Info, FMT_STRING(" denormalizedVertexAttributes: {}"), config.denormalizedVertexAttributes);
Log.report(logvisor::Info, FMT_STRING(" fogType: {}"), config.fogType);
}
std::string uniformPre;
std::string uniBufAttrs;
std::string uniformBindings;
std::string sampBindings;
std::string texBindings;
std::string vtxOutAttrs;
std::string vtxInAttrs;
std::string vtxXfrAttrsPre;
std::string vtxXfrAttrs;
size_t locIdx = 0;
if (config.denormalizedVertexAttributes) {
vtxInAttrs += "\n @location(0) in_pos: vec3<f32>";
vtxOutAttrs += "\n @builtin(position) pos: vec4<f32>;";
vtxXfrAttrsPre +=
"\n var obj_pos = vec4<f32>(in_pos, 1.0);"
"\n var mv_pos = ubuf.mv * obj_pos;"
"\n out.pos = ubuf.proj * mv_pos;";
if (config.denormalizedHasNrm) {
vtxOutAttrs += fmt::format(FMT_STRING("\n @location({}) nrm: vec3<f32>;"), locIdx);
vtxInAttrs += fmt::format(FMT_STRING("\n , @location({}) in_nrm: vec3<f32>"), ++locIdx);
vtxXfrAttrs += fmt::format(FMT_STRING("\n out.nrm = in_nrm;"));
vtxXfrAttrsPre +=
"\n var obj_norm = vec4<f32>(in_nrm, 0.0);"
"\n var mv_norm = ubuf.mv_inv * obj_norm;";
info.usesNormal = true;
}
} else {
uniformBindings += R"""(
struct Vec3Block {
data: array<vec4<f32>>;
};
struct Vec2Block {
data: array<vec2<f32>>;
};
@group(0) @binding(1)
var<storage, read> v_verts: Vec3Block;
@group(0) @binding(2)
var<storage, read> v_norms: Vec3Block;
@group(0) @binding(3)
var<storage, read> v_uvs: Vec2Block;
@group(0) @binding(4)
var<storage, read> v_packed_uvs: Vec2Block;
)""";
vtxInAttrs +=
"\n @location(0) in_pos_nrm_idx: vec2<i32>"
"\n , @location(1) in_uv_0_4_idx: vec4<i32>"
"\n , @location(2) in_uv_5_7_idx: vec4<i32>";
vtxOutAttrs += "\n @builtin(position) pos: vec4<f32>;";
vtxXfrAttrsPre +=
"\n var obj_pos = vec4<f32>(v_verts.data[in_pos_nrm_idx[0]].xyz, 1.0);"
"\n var obj_norm = vec4<f32>(v_norms.data[in_pos_nrm_idx[1]].xyz, 0.0);"
"\n var mv_pos = ubuf.mv * obj_pos;"
"\n var mv_norm = ubuf.mv_inv * obj_norm;"
"\n out.pos = ubuf.proj * mv_pos;";
}
std::string fragmentFnPre;
std::string fragmentFn;
for (size_t idx = 0; const auto& stage : config.tevStages) {
if (!stage) {
break;
}
{
std::string outReg;
switch (stage->colorOp.outReg) {
case GX::TevRegID::TEVPREV:
outReg = "prev";
break;
case GX::TEVREG0:
outReg = "tevreg0";
info.usesTevReg.set(0);
break;
case GX::TEVREG1:
outReg = "tevreg1";
info.usesTevReg.set(1);
break;
case GX::TEVREG2:
outReg = "tevreg2";
info.usesTevReg.set(2);
break;
default:
Log.report(logvisor::Fatal, FMT_STRING("invalid colorOp outReg {}"), stage->colorOp.outReg);
}
std::string op = fmt::format(
FMT_STRING("({3} {4} ((1.0 - {2}) * {0} + {2} * {1}){5}){6}"),
color_arg_reg(stage->colorPass.a, idx, *stage, info), color_arg_reg(stage->colorPass.b, idx, *stage, info),
color_arg_reg(stage->colorPass.c, idx, *stage, info), color_arg_reg(stage->colorPass.d, idx, *stage, info),
tev_op(stage->colorOp.op), tev_bias(stage->colorOp.bias), tev_scale(stage->colorOp.scale));
if (stage->colorOp.clamp) {
op = fmt::format(FMT_STRING("clamp(vec3<f32>({}), vec3<f32>(0.0), vec3<f32>(1.0))"), op);
}
fragmentFn += fmt::format(FMT_STRING("\n {0} = vec4<f32>({1}, {0}.a);"), outReg, op);
}
{
std::string outReg;
switch (stage->alphaOp.outReg) {
case GX::TevRegID::TEVPREV:
outReg = "prev.a";
break;
case GX::TEVREG0:
outReg = "tevreg0.a";
info.usesTevReg.set(0);
break;
case GX::TEVREG1:
outReg = "tevreg1.a";
info.usesTevReg.set(1);
break;
case GX::TEVREG2:
outReg = "tevreg2.a";
info.usesTevReg.set(2);
break;
default:
Log.report(logvisor::Fatal, FMT_STRING("invalid alphaOp outReg {}"), stage->alphaOp.outReg);
}
std::string op = fmt::format(
FMT_STRING("({3} {4} ((1.0 - {2}) * {0} + {2} * {1}){5}){6}"),
alpha_arg_reg(stage->alphaPass.a, idx, *stage, info), alpha_arg_reg(stage->alphaPass.b, idx, *stage, info),
alpha_arg_reg(stage->alphaPass.c, idx, *stage, info), alpha_arg_reg(stage->alphaPass.d, idx, *stage, info),
tev_op(stage->alphaOp.op), tev_bias(stage->alphaOp.bias), tev_scale(stage->alphaOp.scale));
if (stage->alphaOp.clamp) {
op = fmt::format(FMT_STRING("clamp({}, 0.0, 1.0)"), op);
}
fragmentFn += fmt::format(FMT_STRING("\n {0} = {1};"), outReg, op);
}
idx++;
}
for (int i = 0; i < info.usesTevReg.size(); ++i) {
if (!info.usesTevReg.test(i)) {
continue;
}
uniBufAttrs += fmt::format(FMT_STRING("\n tevreg{}: vec4<f32>;"), i);
fragmentFnPre += fmt::format(FMT_STRING("\n var tevreg{0} = ubuf.tevreg{0};"), i);
info.uniformSize += 16;
}
bool addedLightStruct = false;
for (int i = 0; i < info.sampledColorChannels.size(); ++i) {
if (!info.sampledColorChannels.test(i)) {
continue;
}
uniBufAttrs += fmt::format(FMT_STRING("\n cc{0}_amb: vec4<f32>;"), i);
uniBufAttrs += fmt::format(FMT_STRING("\n cc{0}_mat: vec4<f32>;"), i);
info.uniformSize += 32;
if (config.denormalizedVertexAttributes && !info.usesVtxColor) {
vtxInAttrs += fmt::format(FMT_STRING("\n , @location({}) in_clr: vec4<f32>"), ++locIdx);
info.usesVtxColor = true;
}
if (config.colorChannels[i].lightingEnabled) {
if (!addedLightStruct) {
uniformPre +=
"\n"
"struct Light {\n"
" pos: vec3<f32>;\n"
" dir: vec3<f32>;\n"
" color: vec4<f32>;\n"
" lin_att: vec3<f32>;\n"
" ang_att: vec3<f32>;\n"
"};";
addedLightStruct = true;
}
uniBufAttrs += fmt::format(FMT_STRING("\n lights{}: array<Light, {}>;"), i, GX::MaxLights);
uniBufAttrs += fmt::format(FMT_STRING("\n lighting_ambient{}: vec4<f32>;"), i);
info.uniformSize += (80 * GX::MaxLights) + 16;
vtxOutAttrs += fmt::format(FMT_STRING("\n @location({}) cc{}: vec4<f32>;"), locIdx++, i);
vtxXfrAttrs += fmt::format(FMT_STRING(R"""(
{{
var lighting = ubuf.lighting_ambient{0} + ubuf.cc{0}_amb;
for (var i = 0; i < {1}; i = i + 1) {{
var light = ubuf.lights{0}[i];
var delta = mv_pos.xyz - light.pos;
var dist = length(delta);
var delta_norm = delta / dist;
var ang_dot = max(dot(delta_norm, light.dir), 0.0);
var att = 1.0 / (light.lin_att.z * dist * dist +
light.lin_att.y * dist +
light.lin_att.x);
var ang_att = light.ang_att.z * ang_dot * ang_dot +
light.ang_att.y * ang_dot +
light.ang_att.x;
var this_color = light.color.xyz * ang_att * att * max(dot(-delta_norm, mv_norm.xyz), 0.0);
lighting = lighting + vec4<f32>(this_color, 0.0);
}}
out.cc{0} = clamp(lighting, vec4<f32>(0.0), vec4<f32>(1.0));
}})"""),
i, GX::MaxLights);
fragmentFnPre += fmt::format(FMT_STRING("\n var rast{0} = in.cc{0};"), i);
} else if (config.colorChannels[i].matSrc == GX::SRC_VTX) {
if (config.denormalizedVertexAttributes) {
vtxOutAttrs += fmt::format(FMT_STRING("\n @location({}) cc{}: vec4<f32>;"), locIdx - 1, i);
vtxXfrAttrs += fmt::format(FMT_STRING("\n out.cc{} = in_clr;"), i);
fragmentFnPre += fmt::format(FMT_STRING("\n var rast{0} = in.cc{0};"), i);
} else {
Log.report(logvisor::Fatal, FMT_STRING("SRC_VTX unsupported with normalized vertex attributes"));
}
} else {
fragmentFnPre += fmt::format(FMT_STRING("\n var rast{0} = ubuf.cc{0}_mat;"), i);
}
}
for (int i = 0; i < info.sampledKColors.size(); ++i) {
if (!info.sampledKColors.test(i)) {
continue;
}
uniBufAttrs += fmt::format(FMT_STRING("\n kcolor{}: vec4<f32>;"), i);
info.uniformSize += 16;
}
size_t texBindIdx = 0;
for (int i = 0; i < info.sampledTextures.size(); ++i) {
if (!info.sampledTextures.test(i)) {
continue;
}
const auto& tcg = config.tcgs[i];
if (config.denormalizedVertexAttributes) {
vtxOutAttrs += fmt::format(FMT_STRING("\n @location({}) tex{}_uv: vec2<f32>;"), locIdx, i);
vtxInAttrs += fmt::format(FMT_STRING("\n , @location({}) in_tex{}_uv: vec2<f32>"), locIdx + 1, i);
// TODO check tcg src for denorm?
vtxXfrAttrs += fmt::format(FMT_STRING("\n var tc{0} = vec4<f32>(in_tex{0}_uv, 0.0, 1.0);"), i);
} else {
vtxOutAttrs += fmt::format(FMT_STRING("\n @location({}) tex{}_uv: vec2<f32>;"), locIdx, i);
if (tcg.src >= GX::TG_TEX0 && tcg.src <= GX::TG_TEX7) {
vtxXfrAttrs += fmt::format(FMT_STRING("\n var tc{} = vec4<f32>({}, 0.0, 1.0);"), i, in_uv(tcg.src - GX::TG_TEX0));
} else if (tcg.src == GX::TG_POS) {
vtxXfrAttrs += fmt::format(FMT_STRING("\n var tc{} = vec4<f32>(obj_pos.xyz, 1.0);"), i);
} else if (tcg.src == GX::TG_NRM) {
vtxXfrAttrs += fmt::format(FMT_STRING("\n var tc{} = vec4<f32>(obj_norm.xyz, 1.0);"), i);
} else {
Log.report(logvisor::Fatal, FMT_STRING("unhandled tcg src {}"), tcg.src);
unreachable();
}
}
// TODO this all assumes MTX3x4 currently
if (tcg.mtx == GX::IDENTITY) {
vtxXfrAttrs += fmt::format(FMT_STRING("\n var tc{0}_tmp = tc{0}.xyz;"), i);
} else {
u32 texMtxIdx = (tcg.mtx - GX::TEXMTX0) / 3;
info.usesTexMtx.set(texMtxIdx);
info.texMtxTypes[texMtxIdx] = tcg.type;
vtxXfrAttrs += fmt::format(FMT_STRING("\n var tc{0}_tmp = ubuf.texmtx{1} * tc{0};"), i, texMtxIdx);
}
if (tcg.normalize) {
vtxXfrAttrs += fmt::format(FMT_STRING("\n tc{0}_tmp = normalize(tc{0}_tmp);"), i);
}
if (tcg.postMtx == GX::PTIDENTITY) {
vtxXfrAttrs += fmt::format(FMT_STRING("\n var tc{0}_proj = tc{0}_tmp;"), i);
} else {
u32 postMtxIdx = (tcg.postMtx - GX::PTTEXMTX0) / 3;
info.usesPTTexMtx.set(postMtxIdx);
vtxXfrAttrs += fmt::format(FMT_STRING("\n var tc{0}_proj = ubuf.postmtx{1} * vec4<f32>(tc{0}_tmp.xyz, 1.0);"), i, postMtxIdx);
}
vtxXfrAttrs += fmt::format(FMT_STRING("\n out.tex{0}_uv = tc{0}_proj.xy;"), i);
fragmentFnPre += fmt::format(
FMT_STRING("\n var sampled{0} = textureSampleBias(tex{0}, tex{0}_samp, in.tex{0}_uv, ubuf.tex{0}_lod);"), i);
locIdx++;
}
for (int i = 0; i < info.usesTexMtx.size(); ++i) {
if (!info.usesTexMtx.test(i)) {
continue;
}
switch (info.texMtxTypes[i]) {
case GX::TG_MTX2x4:
uniBufAttrs += fmt::format(FMT_STRING("\n texmtx{}: mat4x2<f32>;"), i);
info.uniformSize += 32;
break;
case GX::TG_MTX3x4:
uniBufAttrs += fmt::format(FMT_STRING("\n texmtx{}: mat4x3<f32>;"), i);
info.uniformSize += 64;
break;
default:
Log.report(logvisor::Fatal, FMT_STRING("unhandled tex mtx type {}"), info.texMtxTypes[i]);
unreachable();
}
}
for (int i = 0; i < info.usesPTTexMtx.size(); ++i) {
if (!info.usesPTTexMtx.test(i)) {
continue;
}
uniBufAttrs += fmt::format(FMT_STRING("\n postmtx{}: mat4x3<f32>;"), i);
info.uniformSize += 64;
}
if (config.fogType != GX::FOG_NONE) {
info.usesFog = true;
uniformPre += "\n"
"struct Fog {\n"
" color: vec4<f32>;\n"
" a: f32;\n"
" b: f32;\n"
" c: f32;\n"
" pad: f32;\n"
"}";
uniBufAttrs += "\n fog: Fog;";
info.uniformSize += 32;
fragmentFn += "\n var fogF = clamp((ubuf.fog.a / (ubuf.fog.b - in.pos.z)) - ubuf.fog.c, 0.0, 1.0);";
switch (config.fogType) {
case GX::FOG_PERSP_LIN:
case GX::FOG_ORTHO_LIN:
fragmentFn += "\n var fogZ = fogF;";
break;
case GX::FOG_PERSP_EXP:
case GX::FOG_ORTHO_EXP:
fragmentFn += "\n var fogZ = 1.0 - exp2(-8.0 * fogF);";
break;
case GX::FOG_PERSP_EXP2:
case GX::FOG_ORTHO_EXP2:
fragmentFn += "\n var fogZ = 1.0 - exp2(-8.0 * fogF * fogF);";
break;
case GX::FOG_PERSP_REVEXP:
case GX::FOG_ORTHO_REVEXP:
fragmentFn += "\n var fogZ = exp2(-8.0 * (1.0 - fogF));";
break;
case GX::FOG_PERSP_REVEXP2:
case GX::FOG_ORTHO_REVEXP2:
fragmentFn += "\n fogF = 1.0 - fogF;"
"\n var fogZ = exp2(-8.0 * fogF * fogF);";
break;
default:
Log.report(logvisor::Fatal, FMT_STRING("invalid fog type {}"), config.fogType);
unreachable();
}
fragmentFn += "\n prev = vec4<f32>(mix(prev.rgb, ubuf.fog.color.rgb, clamp(fogZ, 0.0, 1.0)), prev.a);";
}
for (int i = 0; i < info.sampledTextures.size(); ++i) {
if (!info.sampledTextures.test(i)) {
continue;
}
uniBufAttrs += fmt::format(FMT_STRING("\n tex{}_lod: f32;"), i);
info.uniformSize += 4;
sampBindings += fmt::format(FMT_STRING("\n@group(1) @binding({})\n"
"var tex{}_samp: sampler;"),
texBindIdx, i);
texBindings += fmt::format(FMT_STRING("\n@group(2) @binding({})\n"
"var tex{}: texture_2d<f32>;"),
texBindIdx, i);
++texBindIdx;
}
if (config.alphaDiscard) {
fragmentFn += fmt::format(FMT_STRING("\n if (prev.a < {}f) {{ discard; }}"), *config.alphaDiscard);
}
const auto shaderSource =
fmt::format(FMT_STRING(R"""({uniformPre}
struct Uniform {{
mv: mat4x4<f32>;
mv_inv: mat4x4<f32>;
proj: mat4x4<f32>;{uniBufAttrs}
}};
@group(0) @binding(0)
var<uniform> ubuf: Uniform;{uniformBindings}{sampBindings}{texBindings}
struct VertexOutput {{{vtxOutAttrs}
}};
@stage(vertex)
fn vs_main({vtxInAttrs}
) -> VertexOutput {{
var out: VertexOutput;{vtxXfrAttrsPre}{vtxXfrAttrs}
return out;
}}
@stage(fragment)
fn fs_main(in: VertexOutput) -> @location(0) vec4<f32> {{
var prev: vec4<f32>;{fragmentFnPre}{fragmentFn}
return prev;
}}
)"""),
"uniBufAttrs"_a = uniBufAttrs, "sampBindings"_a = sampBindings, "texBindings"_a = texBindings,
"vtxOutAttrs"_a = vtxOutAttrs, "vtxInAttrs"_a = vtxInAttrs, "vtxXfrAttrs"_a = vtxXfrAttrs,
"fragmentFn"_a = fragmentFn, "fragmentFnPre"_a = fragmentFnPre, "vtxXfrAttrsPre"_a = vtxXfrAttrsPre,
"uniformBindings"_a = uniformBindings, "uniformPre"_a = uniformPre);
Log.report(logvisor::Info, FMT_STRING("Generated shader: {}"), shaderSource);
wgpu::ShaderModuleWGSLDescriptor wgslDescriptor{};
wgslDescriptor.source = shaderSource.c_str();
const auto label = fmt::format(FMT_STRING("GX Shader {:x}"), hash);
const auto shaderDescriptor = wgpu::ShaderModuleDescriptor{
.nextInChain = &wgslDescriptor,
.label = label.c_str(),
};
auto shader = gpu::g_device.CreateShaderModule(&shaderDescriptor);
info.uniformSize = align_uniform(info.uniformSize);
auto pair = std::make_pair(std::move(shader), info);
g_gxCachedShaders.emplace(hash, pair);
#ifndef NDEBUG
g_gxCachedShaderConfigs.emplace(hash, config);
#endif
return pair;
}
} // namespace aurora::gfx::gx
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