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gl_shader_decompiler: Scope GLSL variables with a scoped object

nce_cpp
ReinUsesLisp 7 years ago
parent
6149038433
commit
e5e98bb15c
1 changed files with 72 additions and 32 deletions
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  1. 104
      src/video_core/renderer_opengl/gl_shader_decompiler.cpp

104
src/video_core/renderer_opengl/gl_shader_decompiler.cpp
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@ -201,14 +201,53 @@ private:
}
};
template <typename T>
class ShaderScopedScope {
public:
explicit ShaderScopedScope(T& writer, std::string_view begin_expr, std::string end_expr)
: writer(writer), end_expr(std::move(end_expr)) {
if (begin_expr.empty()) {
writer.AddLine('{');
} else {
writer.AddExpression(begin_expr);
writer.AddLine(" {");
}
++writer.scope;
}
ShaderScopedScope(const ShaderScopedScope&) = delete;
~ShaderScopedScope() {
--writer.scope;
if (end_expr.empty()) {
writer.AddLine('}');
} else {
writer.AddExpression("} ");
writer.AddExpression(end_expr);
writer.AddLine(';');
}
}
ShaderScopedScope& operator=(const ShaderScopedScope&) = delete;
private:
T& writer;
std::string end_expr;
};
class ShaderWriter {
public:
void AddLine(std::string_view text) {
void AddExpression(std::string_view text) {
DEBUG_ASSERT(scope >= 0);
if (!text.empty()) {
AppendIndentation();
}
shader_source += text;
}
void AddLine(std::string_view text) {
AddExpression(text);
AddNewLine();
}
@ -228,6 +267,11 @@ public:
return std::move(shader_source);
}
ShaderScopedScope<ShaderWriter> Scope(std::string_view begin_expr = {},
std::string end_expr = {}) {
return ShaderScopedScope(*this, begin_expr, end_expr);
}
int scope = 0;
private:
@ -311,7 +355,7 @@ public:
// Default - do nothing
return value;
default:
UNIMPLEMENTED_MSG("Unimplemented conversion size: {}", static_cast<u32>(size));
UNREACHABLE_MSG("Unimplemented conversion size: {}", static_cast<u32>(size));
}
}
@ -2747,26 +2791,28 @@ private:
UNIMPLEMENTED_IF_MSG(instr.texs.UsesMiscMode(Tegra::Shader::TextureMiscMode::NODEP),
"NODEP is not implemented");
const auto scope = shader.Scope();
const bool depth_compare =
instr.texs.UsesMiscMode(Tegra::Shader::TextureMiscMode::DC);
u32 num_coordinates = TextureCoordinates(texture_type);
const auto process_mode = instr.texs.GetTextureProcessMode();
std::string lod_value;
std::string coord;
u32 lod_offset = 0;
if (process_mode == Tegra::Shader::TextureProcessMode::LL) {
if (num_coordinates > 2) {
lod_value = regs.GetRegisterAsFloat(instr.gpr20.Value() + 1);
shader.AddLine("float lod_value = " +
regs.GetRegisterAsFloat(instr.gpr20.Value() + 1) + ';');
lod_offset = 2;
} else {
lod_value = regs.GetRegisterAsFloat(instr.gpr20);
shader.AddLine("float lod_value = " + regs.GetRegisterAsFloat(instr.gpr20) +
';');
lod_offset = 1;
}
}
switch (num_coordinates) {
case 1: {
coord = "float coords = " + regs.GetRegisterAsFloat(instr.gpr8) + ';';
shader.AddLine("float coords = " + regs.GetRegisterAsFloat(instr.gpr8) + ';');
break;
}
case 2: {
@ -2776,13 +2822,14 @@ private:
const std::string x = regs.GetRegisterAsFloat(instr.gpr8.Value() + 1);
const std::string y = regs.GetRegisterAsFloat(instr.gpr20);
const std::string z = regs.GetRegisterAsFloat(instr.gpr20.Value() + 1);
coord = "vec4 coords = vec4(" + x + ", " + y + ", " + z + ", " + index +
");";
shader.AddLine("vec4 coords = vec4(" + x + ", " + y + ", " + z + ", " +
index + ");");
} else {
const std::string index = regs.GetRegisterAsInteger(instr.gpr8);
const std::string x = regs.GetRegisterAsFloat(instr.gpr8.Value() + 1);
const std::string y = regs.GetRegisterAsFloat(instr.gpr20);
coord = "vec3 coords = vec3(" + x + ", " + y + ", " + index + ");";
shader.AddLine("vec3 coords = vec3(" + x + ", " + y + ", " + index +
");");
}
} else {
if (lod_offset != 0) {
@ -2792,12 +2839,13 @@ private:
regs.GetRegisterAsFloat(instr.gpr8.Value() + 1);
const std::string z =
regs.GetRegisterAsFloat(instr.gpr20.Value() + lod_offset);
coord = "vec3 coords = vec3(" + x + ", " + y + ", " + z + ");";
shader.AddLine("vec3 coords = vec3(" + x + ", " + y + ", " + z +
");");
} else {
const std::string x = regs.GetRegisterAsFloat(instr.gpr8);
const std::string y =
regs.GetRegisterAsFloat(instr.gpr8.Value() + 1);
coord = "vec2 coords = vec2(" + x + ", " + y + ");";
shader.AddLine("vec2 coords = vec2(" + x + ", " + y + ");");
}
} else {
if (depth_compare) {
@ -2805,11 +2853,12 @@ private:
const std::string y =
regs.GetRegisterAsFloat(instr.gpr8.Value() + 1);
const std::string z = regs.GetRegisterAsFloat(instr.gpr20);
coord = "vec3 coords = vec3(" + x + ", " + y + ", " + z + ");";
shader.AddLine("vec3 coords = vec3(" + x + ", " + y + ", " + z +
");");
} else {
const std::string x = regs.GetRegisterAsFloat(instr.gpr8);
const std::string y = regs.GetRegisterAsFloat(instr.gpr20);
coord = "vec2 coords = vec2(" + x + ", " + y + ");";
shader.AddLine("vec2 coords = vec2(" + x + ", " + y + ");");
}
}
}
@ -2819,7 +2868,7 @@ private:
const std::string x = regs.GetRegisterAsFloat(instr.gpr8);
const std::string y = regs.GetRegisterAsFloat(instr.gpr8.Value() + 1);
const std::string z = regs.GetRegisterAsFloat(instr.gpr20);
coord = "vec3 coords = vec3(" + x + ", " + y + ", " + z + ");";
shader.AddLine("vec3 coords = vec3(" + x + ", " + y + ", " + z + ");");
break;
}
default:
@ -2829,7 +2878,7 @@ private:
// Fallback to interpreting as a 2D texture for now
const std::string x = regs.GetRegisterAsFloat(instr.gpr8);
const std::string y = regs.GetRegisterAsFloat(instr.gpr20);
coord = "vec2 coords = vec2(" + x + ", " + y + ");";
shader.AddLine("vec2 coords = vec2(" + x + ", " + y + ");");
texture_type = Tegra::Shader::TextureType::Texture2D;
is_array = false;
}
@ -2850,7 +2899,7 @@ private:
break;
}
case Tegra::Shader::TextureProcessMode::LL: {
texture = "textureLod(" + sampler + ", coords, " + lod_value + ')';
texture = "textureLod(" + sampler + ", coords, lod_value)";
break;
}
default: {
@ -2883,15 +2932,12 @@ private:
u32 extra_op_offset = 0;
// Scope to avoid variable name overlaps.
shader.AddLine('{');
++shader.scope;
std::string coords;
ShaderScopedScope scope = shader.Scope();
switch (texture_type) {
case Tegra::Shader::TextureType::Texture1D: {
const std::string x = regs.GetRegisterAsInteger(instr.gpr8);
coords = "float coords = " + x + ';';
shader.AddLine("float coords = " + x + ';');
break;
}
case Tegra::Shader::TextureType::Texture2D: {
@ -2900,7 +2946,7 @@ private:
const std::string x = regs.GetRegisterAsInteger(instr.gpr8);
const std::string y = regs.GetRegisterAsInteger(instr.gpr20);
// shader.AddLine("ivec2 coords = ivec2(" + x + ", " + y + ");");
coords = "ivec2 coords = ivec2(" + x + ", " + y + ");";
shader.AddLine("ivec2 coords = ivec2(" + x + ", " + y + ");");
extra_op_offset = 1;
break;
}
@ -2929,9 +2975,6 @@ private:
}
}
WriteTexsInstruction(instr, coords, texture);
--shader.scope;
shader.AddLine('}');
break;
}
case OpCode::Id::TLD4: {
@ -3015,10 +3058,7 @@ private:
instr.tld4s.UsesMiscMode(Tegra::Shader::TextureMiscMode::AOFFI),
"AOFFI is not implemented");
// Scope to avoid variable name overlaps.
shader.AddLine('{');
++shader.scope;
std::string coords;
const auto scope = shader.Scope();
const bool depth_compare =
instr.tld4s.UsesMiscMode(Tegra::Shader::TextureMiscMode::DC);
@ -3028,11 +3068,11 @@ private:
const std::string sampler = GetSampler(
instr.sampler, Tegra::Shader::TextureType::Texture2D, false, depth_compare);
if (!depth_compare) {
coords = "vec2 coords = vec2(" + op_a + ", " + op_b + ");";
shader.AddLine("vec2 coords = vec2(" + op_a + ", " + op_b + ");");
} else {
// Note: TLD4S coordinate encoding works just like TEXS's
const std::string op_y = regs.GetRegisterAsFloat(instr.gpr8.Value() + 1);
coords = "vec3 coords = vec3(" + op_a + ", " + op_y + ", " + op_b + ");";
shader.AddLine("vec3 coords = vec3(" + op_a + ", " + op_y + ", " + op_b + ");");
}
const std::string texture = "textureGather(" + sampler + ", coords, " +
std::to_string(instr.tld4s.component) + ')';

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