C Interface: Split SPIR-V C interface to own file

This breaks a cyclic dependency between the SPIRV and glslang build targets.

SPIRV/CInterface/spirv_c_interface.cpp

@@ -0,0 +1,110 @@
+/**
+    This code is based on the glslang_c_interface implementation by Viktor Latypov
+**/
+
+/**
+BSD 2-Clause License
+
+Copyright (c) 2019, Viktor Latypov
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+1. Redistributions of source code must retain the above copyright notice, this
+   list of conditions and the following disclaimer.
+
+2. Redistributions in binary form must reproduce the above copyright notice,
+   this list of conditions and the following disclaimer in the documentation
+   and/or other materials provided with the distribution.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+**/
+
+#include "glslang/Include/glslang_c_interface.h"
+
+#include "SPIRV/GlslangToSpv.h"
+#include "SPIRV/Logger.h"
+#include "SPIRV/SpvTools.h"
+
+typedef struct glslang_program_s {
+    glslang::TProgram* program;
+    std::vector<unsigned int> spirv;
+    std::string loggerMessages;
+} glslang_program_t;
+
+static EShLanguage c_shader_stage(glslang_stage_t stage)
+{
+    switch (stage) {
+    case GLSLANG_STAGE_VERTEX:
+        return EShLangVertex;
+    case GLSLANG_STAGE_TESSCONTROL:
+        return EShLangTessControl;
+    case GLSLANG_STAGE_TESSEVALUATION:
+        return EShLangTessEvaluation;
+    case GLSLANG_STAGE_GEOMETRY:
+        return EShLangGeometry;
+    case GLSLANG_STAGE_FRAGMENT:
+        return EShLangFragment;
+    case GLSLANG_STAGE_COMPUTE:
+        return EShLangCompute;
+    case GLSLANG_STAGE_RAYGEN_NV:
+        return EShLangRayGen;
+    case GLSLANG_STAGE_INTERSECT_NV:
+        return EShLangIntersect;
+    case GLSLANG_STAGE_ANYHIT_NV:
+        return EShLangAnyHit;
+    case GLSLANG_STAGE_CLOSESTHIT_NV:
+        return EShLangClosestHit;
+    case GLSLANG_STAGE_MISS_NV:
+        return EShLangMiss;
+    case GLSLANG_STAGE_CALLABLE_NV:
+        return EShLangCallable;
+    case GLSLANG_STAGE_TASK_NV:
+        return EShLangTaskNV;
+    case GLSLANG_STAGE_MESH_NV:
+        return EShLangMeshNV;
+    default:
+        break;
+    }
+    return EShLangCount;
+}
+
+void glslang_program_SPIRV_generate(glslang_program_t* program, glslang_stage_t stage)
+{
+    spv::SpvBuildLogger logger;
+    glslang::SpvOptions spvOptions;
+    spvOptions.validate = true;
+
+    const glslang::TIntermediate* intermediate = program->program->getIntermediate(c_shader_stage(stage));
+
+    glslang::GlslangToSpv(*intermediate, program->spirv, &logger, &spvOptions);
+
+    program->loggerMessages = logger.getAllMessages();
+}
+
+size_t glslang_program_SPIRV_get_size(glslang_program_t* program) { return program->spirv.size(); }
+
+void glslang_program_SPIRV_get(glslang_program_t* program, unsigned int* out)
+{
+    memcpy(out, program->spirv.data(), program->spirv.size() * sizeof(unsigned int));
+}
+
+unsigned int* glslang_program_SPIRV_get_ptr(glslang_program_t* program)
+{
+    return program->spirv.data();
+}
+
+const char* glslang_program_SPIRV_get_messages(glslang_program_t* program)
+{
+    return program->loggerMessages.empty() ? nullptr : program->loggerMessages.c_str();
+}

SPIRV/CMakeLists.txt

@@ -6,7 +6,8 @@ set(SOURCES
     SpvPostProcess.cpp
     doc.cpp
     SpvTools.cpp
-    disassemble.cpp)
+    disassemble.cpp
+    CInterface/spirv_c_interface.cpp)
 
 set(SPVREMAP_SOURCES
     SPVRemapper.cpp

glslang/CInterface/glslang_c_interface.cpp

@@ -32,9 +32,6 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 #include "glslang/Include/glslang_c_interface.h"
 
-#include "SPIRV/GlslangToSpv.h"
-#include "SPIRV/Logger.h"
-#include "SPIRV/SpvTools.h"
 #include "StandAlone/DirStackFileIncluder.h"
 #include "StandAlone/ResourceLimits.h"
 #include "glslang/Include/ShHandle.h"
@@ -401,36 +398,6 @@ glslang_program_t* glslang_program_create()
     return p;
 }
 
-void glslang_program_SPIRV_generate(glslang_program_t* program, glslang_stage_t stage)
-{
-    spv::SpvBuildLogger logger;
-    glslang::SpvOptions spvOptions;
-    spvOptions.validate = true;
-
-    const glslang::TIntermediate* intermediate = program->program->getIntermediate(c_shader_stage(stage));
-
-    glslang::GlslangToSpv(*intermediate, program->spirv, &logger, &spvOptions);
-
-    program->loggerMessages = logger.getAllMessages();
-}
-
-size_t glslang_program_SPIRV_get_size(glslang_program_t* program) { return program->spirv.size(); }
-
-void glslang_program_SPIRV_get(glslang_program_t* program, unsigned int* out)
-{
-    memcpy(out, program->spirv.data(), program->spirv.size() * sizeof(unsigned int));
-}
-
-unsigned int* glslang_program_SPIRV_get_ptr(glslang_program_t* program)
-{
-    return program->spirv.data();
-}
-
-const char* glslang_program_SPIRV_get_messages(glslang_program_t* program)
-{
-    return program->loggerMessages.empty() ? nullptr : program->loggerMessages.c_str();
-}
-
 void glslang_program_delete(glslang_program_t* program)
 {
     if (!program)