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Add fallback for diffuse expression

This commit is contained in:
Jack Andersen 2019-02-24 22:10:34 -10:00
parent a9254f6643
commit 8e8ecaf4aa
2 changed files with 12 additions and 7 deletions
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3
hecl/include/hecl/Backend/ProgrammableCommon.hpp
View File

@ -44,7 +44,8 @@ struct ProgrammableCommon : IBackend {
private:
unsigned addTexCoordGen(TexGenSrc src, int uvIdx, int mtx, bool normalize);
unsigned addTexSampling(unsigned mapIdx, unsigned tcgIdx);
std::string RecursiveTraceDiffuseColor(const IR& ir, Diagnostics& diag, const IR::Instruction& inst, bool toSwizzle);
std::string RecursiveTraceDiffuseColor(const IR& ir, Diagnostics& diag, const IR::Instruction& inst, bool toSwizzle,
bool fallback);
std::string RecursiveTraceColor(const IR& ir, Diagnostics& diag, const IR::Instruction& inst, bool toSwizzle);
std::string RecursiveTraceAlpha(const IR& ir, Diagnostics& diag, const IR::Instruction& inst, bool toSwizzle);
unsigned RecursiveTraceTexGen(const IR& ir, Diagnostics& diag, const IR::Instruction& inst, int mtx, bool normalize);

16
hecl/lib/Backend/ProgrammableCommon.cpp
View File

@ -96,13 +96,15 @@ unsigned ProgrammableCommon::RecursiveTraceTexGen(const IR& ir, Diagnostics& dia
}
std::string ProgrammableCommon::RecursiveTraceDiffuseColor(const IR& ir, Diagnostics& diag, const IR::Instruction& inst,
bool toSwizzle) {
bool toSwizzle, bool fallback) {
switch (inst.m_op) {
case IR::OpType::Call: {
const std::string& name = inst.m_call.m_name;
bool normalize = false;
if (!name.compare("TextureD") ||
((normalize = true) && !name.compare("TextureDN"))) {
(fallback && !name.compare("Texture")) ||
((normalize = true) && !name.compare("TextureDN")) ||
((normalize = true) && fallback && !name.compare("TextureN"))) {
if (inst.getChildCount() < 2)
diag.reportBackendErr(inst.m_loc, "Texture(map, texgen) requires 2 arguments");
@ -125,13 +127,13 @@ std::string ProgrammableCommon::RecursiveTraceDiffuseColor(const IR& ir, Diagnos
case IR::OpType::Arithmetic: {
const IR::Instruction& aInst = inst.getChildInst(ir, 0);
const IR::Instruction& bInst = inst.getChildInst(ir, 1);
std::string aTrace = RecursiveTraceDiffuseColor(ir, diag, aInst, false);
std::string bTrace = RecursiveTraceDiffuseColor(ir, diag, bInst, false);
std::string aTrace = RecursiveTraceDiffuseColor(ir, diag, aInst, false, fallback);
std::string bTrace = RecursiveTraceDiffuseColor(ir, diag, bInst, false, fallback);
return (!aTrace.empty()) ? aTrace : bTrace;
}
case IR::OpType::Swizzle: {
const IR::Instruction& aInst = inst.getChildInst(ir, 0);
std::string aTrace = RecursiveTraceDiffuseColor(ir, diag, aInst, true);
std::string aTrace = RecursiveTraceDiffuseColor(ir, diag, aInst, true, fallback);
if (!aTrace.empty())
return EmitSwizzle3(diag, inst.m_loc, aTrace, inst.m_swizzle.m_idxs);
return std::string();
@ -327,7 +329,9 @@ void ProgrammableCommon::reset(const IR& ir, Diagnostics& diag, const char* back
/* Follow Color Chain */
const IR::Instruction& colorRoot = ir.m_instructions.at(rootCall.m_call.m_argInstIdxs.at(0));
m_diffuseColorExpr = RecursiveTraceDiffuseColor(ir, diag, colorRoot, false);
m_diffuseColorExpr = RecursiveTraceDiffuseColor(ir, diag, colorRoot, false, false);
if (m_diffuseColorExpr.empty())
m_diffuseColorExpr = RecursiveTraceDiffuseColor(ir, diag, colorRoot, false, true);
m_colorExpr = RecursiveTraceColor(ir, diag, colorRoot, false);
/* Follow Alpha Chain */