| /* |
| * Copyright 2016 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #ifndef SKSL_LAYOUT |
| #define SKSL_LAYOUT |
| |
| #include "SkSLString.h" |
| #include "SkSLUtil.h" |
| |
| namespace SkSL { |
| |
| /** |
| * Represents a layout block appearing before a variable declaration, as in: |
| * |
| * layout (location = 0) int x; |
| */ |
| struct Layout { |
| enum Primitive { |
| kUnspecified_Primitive = -1, |
| kPoints_Primitive, |
| kLines_Primitive, |
| kLineStrip_Primitive, |
| kLinesAdjacency_Primitive, |
| kTriangles_Primitive, |
| kTriangleStrip_Primitive, |
| kTrianglesAdjacency_Primitive |
| }; |
| |
| // These are used by images in GLSL. We only support a subset of what GL supports. |
| enum class Format { |
| kUnspecified = -1, |
| kRGBA32F, |
| kR32F, |
| kRGBA16F, |
| kR16F, |
| kRGBA8, |
| kR8, |
| kRGBA8I, |
| kR8I, |
| }; |
| |
| // used by SkSL processors |
| enum Key { |
| // field is not a key |
| kNo_Key, |
| // field is a key |
| kKey_Key, |
| // key is 0 or 1 depending on whether the matrix is an identity matrix |
| kIdentity_Key, |
| }; |
| |
| static const char* FormatToStr(Format format) { |
| switch (format) { |
| case Format::kUnspecified: return ""; |
| case Format::kRGBA32F: return "rgba32f"; |
| case Format::kR32F: return "r32f"; |
| case Format::kRGBA16F: return "rgba16f"; |
| case Format::kR16F: return "r16f"; |
| case Format::kRGBA8: return "rgba8"; |
| case Format::kR8: return "r8"; |
| case Format::kRGBA8I: return "rgba8i"; |
| case Format::kR8I: return "r8i"; |
| } |
| ABORT("Unexpected format"); |
| } |
| |
| static bool ReadFormat(String str, Format* format) { |
| if (str == "rgba32f") { |
| *format = Format::kRGBA32F; |
| return true; |
| } else if (str == "r32f") { |
| *format = Format::kR32F; |
| return true; |
| } else if (str == "rgba16f") { |
| *format = Format::kRGBA16F; |
| return true; |
| } else if (str == "r16f") { |
| *format = Format::kR16F; |
| return true; |
| } else if (str == "rgba8") { |
| *format = Format::kRGBA8; |
| return true; |
| } else if (str == "r8") { |
| *format = Format::kR8; |
| return true; |
| } else if (str == "rgba8i") { |
| *format = Format::kRGBA8I; |
| return true; |
| } else if (str == "r8i") { |
| *format = Format::kR8I; |
| return true; |
| } |
| return false; |
| } |
| |
| Layout(int location, int offset, int binding, int index, int set, int builtin, |
| int inputAttachmentIndex, bool originUpperLeft, bool overrideCoverage, |
| bool blendSupportAllEquations, Format format, bool pushconstant, Primitive primitive, |
| int maxVertices, int invocations, String when, Key key) |
| : fLocation(location) |
| , fOffset(offset) |
| , fBinding(binding) |
| , fIndex(index) |
| , fSet(set) |
| , fBuiltin(builtin) |
| , fInputAttachmentIndex(inputAttachmentIndex) |
| , fOriginUpperLeft(originUpperLeft) |
| , fOverrideCoverage(overrideCoverage) |
| , fBlendSupportAllEquations(blendSupportAllEquations) |
| , fFormat(format) |
| , fPushConstant(pushconstant) |
| , fPrimitive(primitive) |
| , fMaxVertices(maxVertices) |
| , fInvocations(invocations) |
| , fWhen(when) |
| , fKey(key) {} |
| |
| Layout() |
| : fLocation(-1) |
| , fOffset(-1) |
| , fBinding(-1) |
| , fIndex(-1) |
| , fSet(-1) |
| , fBuiltin(-1) |
| , fInputAttachmentIndex(-1) |
| , fOriginUpperLeft(false) |
| , fOverrideCoverage(false) |
| , fBlendSupportAllEquations(false) |
| , fFormat(Format::kUnspecified) |
| , fPushConstant(false) |
| , fPrimitive(kUnspecified_Primitive) |
| , fMaxVertices(-1) |
| , fInvocations(-1) |
| , fKey(kNo_Key) {} |
| |
| String description() const { |
| String result; |
| String separator; |
| if (fLocation >= 0) { |
| result += separator + "location = " + to_string(fLocation); |
| separator = ", "; |
| } |
| if (fOffset >= 0) { |
| result += separator + "offset = " + to_string(fOffset); |
| separator = ", "; |
| } |
| if (fBinding >= 0) { |
| result += separator + "binding = " + to_string(fBinding); |
| separator = ", "; |
| } |
| if (fIndex >= 0) { |
| result += separator + "index = " + to_string(fIndex); |
| separator = ", "; |
| } |
| if (fSet >= 0) { |
| result += separator + "set = " + to_string(fSet); |
| separator = ", "; |
| } |
| if (fBuiltin >= 0) { |
| result += separator + "builtin = " + to_string(fBuiltin); |
| separator = ", "; |
| } |
| if (fInputAttachmentIndex >= 0) { |
| result += separator + "input_attachment_index = " + to_string(fBuiltin); |
| separator = ", "; |
| } |
| if (fOriginUpperLeft) { |
| result += separator + "origin_upper_left"; |
| separator = ", "; |
| } |
| if (fOverrideCoverage) { |
| result += separator + "override_coverage"; |
| separator = ", "; |
| } |
| if (fBlendSupportAllEquations) { |
| result += separator + "blend_support_all_equations"; |
| separator = ", "; |
| } |
| if (Format::kUnspecified != fFormat) { |
| result += separator + FormatToStr(fFormat); |
| separator = ", "; |
| } |
| if (fPushConstant) { |
| result += separator + "push_constant"; |
| separator = ", "; |
| } |
| switch (fPrimitive) { |
| case kPoints_Primitive: |
| result += separator + "points"; |
| separator = ", "; |
| break; |
| case kLines_Primitive: |
| result += separator + "lines"; |
| separator = ", "; |
| break; |
| case kLineStrip_Primitive: |
| result += separator + "line_strip"; |
| separator = ", "; |
| break; |
| case kLinesAdjacency_Primitive: |
| result += separator + "lines_adjacency"; |
| separator = ", "; |
| break; |
| case kTriangles_Primitive: |
| result += separator + "triangles"; |
| separator = ", "; |
| break; |
| case kTriangleStrip_Primitive: |
| result += separator + "triangle_strip"; |
| separator = ", "; |
| break; |
| case kTrianglesAdjacency_Primitive: |
| result += separator + "triangles_adjacency"; |
| separator = ", "; |
| break; |
| case kUnspecified_Primitive: |
| break; |
| } |
| if (fMaxVertices >= 0) { |
| result += separator + "max_vertices = " + to_string(fMaxVertices); |
| separator = ", "; |
| } |
| if (fInvocations >= 0) { |
| result += separator + "invocations = " + to_string(fInvocations); |
| separator = ", "; |
| } |
| if (fWhen.size()) { |
| result += separator + "when = " + fWhen; |
| separator = ", "; |
| } |
| switch (fKey) { |
| case kNo_Key: |
| break; |
| case kKey_Key: |
| result += separator + "key"; |
| separator = ", "; |
| break; |
| case kIdentity_Key: |
| result += separator + "key=identity"; |
| separator = ", "; |
| break; |
| } |
| if (result.size() > 0) { |
| result = "layout (" + result + ")"; |
| } |
| return result; |
| } |
| |
| bool operator==(const Layout& other) const { |
| return fLocation == other.fLocation && |
| fOffset == other.fOffset && |
| fBinding == other.fBinding && |
| fIndex == other.fIndex && |
| fSet == other.fSet && |
| fBuiltin == other.fBuiltin && |
| fInputAttachmentIndex == other.fInputAttachmentIndex && |
| fOriginUpperLeft == other.fOriginUpperLeft && |
| fOverrideCoverage == other.fOverrideCoverage && |
| fBlendSupportAllEquations == other.fBlendSupportAllEquations && |
| fFormat == other.fFormat && |
| fPrimitive == other.fPrimitive && |
| fMaxVertices == other.fMaxVertices && |
| fInvocations == other.fInvocations; |
| } |
| |
| bool operator!=(const Layout& other) const { |
| return !(*this == other); |
| } |
| |
| int fLocation; |
| int fOffset; |
| int fBinding; |
| int fIndex; |
| int fSet; |
| // builtin comes from SPIR-V and identifies which particular builtin value this object |
| // represents. |
| int fBuiltin; |
| // input_attachment_index comes from Vulkan/SPIR-V to connect a shader variable to the a |
| // corresponding attachment on the subpass in which the shader is being used. |
| int fInputAttachmentIndex; |
| bool fOriginUpperLeft; |
| bool fOverrideCoverage; |
| bool fBlendSupportAllEquations; |
| Format fFormat; |
| bool fPushConstant; |
| Primitive fPrimitive; |
| int fMaxVertices; |
| int fInvocations; |
| String fWhen; |
| Key fKey; |
| }; |
| |
| } // namespace |
| |
| #endif |
