295 lines
7.0 KiB
C++
295 lines
7.0 KiB
C++
/*
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* Copyright 2011-2016 Branimir Karadzic. All rights reserved.
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* License: https://github.com/bkaradzic/bgfx#license-bsd-2-clause
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*/
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#include "shaderc.h"
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#include "glsl_optimizer.h"
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namespace bgfx { namespace glsl
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{
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static bool compile(bx::CommandLine& _cmdLine, uint32_t _version, const std::string& _code, bx::WriterI* _writer)
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{
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char ch = char(tolower(_cmdLine.findOption('\0', "type")[0]) );
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const glslopt_shader_type type = ch == 'f'
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? kGlslOptShaderFragment
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: (ch == 'c' ? kGlslOptShaderCompute : kGlslOptShaderVertex);
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glslopt_target target = kGlslTargetOpenGL;
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switch (_version)
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{
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case BX_MAKEFOURCC('M', 'T', 'L', 0):
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target = kGlslTargetMetal;
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break;
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case 2:
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target = kGlslTargetOpenGLES20;
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break;
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case 3:
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target = kGlslTargetOpenGLES30;
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break;
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default:
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target = kGlslTargetOpenGL;
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break;
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}
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glslopt_ctx* ctx = glslopt_initialize(target);
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glslopt_shader* shader = glslopt_optimize(ctx, type, _code.c_str(), 0);
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if (!glslopt_get_status(shader) )
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{
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const char* log = glslopt_get_log(shader);
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int32_t source = 0;
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int32_t line = 0;
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int32_t column = 0;
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int32_t start = 0;
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int32_t end = INT32_MAX;
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bool found = false
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|| 3 == sscanf(log, "%u:%u(%u):", &source, &line, &column)
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;
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if (found
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&& 0 != line)
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{
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start = bx::uint32_imax(1, line-10);
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end = start + 20;
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}
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printCode(_code.c_str(), line, start, end, column);
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fprintf(stderr, "Error: %s\n", log);
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glslopt_cleanup(ctx);
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return false;
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}
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const char* optimizedShader = glslopt_get_output(shader);
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// Trim all directives.
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while ('#' == *optimizedShader)
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{
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optimizedShader = bx::strnl(optimizedShader);
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}
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if (0 != _version)
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{
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char* code = const_cast<char*>(optimizedShader);
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strReplace(code, "gl_FragDepthEXT", "gl_FragDepth");
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strReplace(code, "texture2DLodEXT", "texture2DLod");
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strReplace(code, "texture2DProjLodEXT", "texture2DProjLod");
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strReplace(code, "textureCubeLodEXT", "textureCubeLod");
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strReplace(code, "texture2DGradEXT", "texture2DGrad");
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strReplace(code, "texture2DProjGradEXT", "texture2DProjGrad");
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strReplace(code, "textureCubeGradEXT", "textureCubeGrad");
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strReplace(code, "shadow2DEXT", "shadow2D");
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strReplace(code, "shadow2DProjEXT", "shadow2DProj");
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}
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UniformArray uniforms;
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if (target != kGlslTargetMetal)
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{
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const char* parse = optimizedShader;
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while (NULL != parse
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&& *parse != '\0')
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{
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parse = bx::strws(parse);
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const char* eol = strchr(parse, ';');
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if (NULL != eol)
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{
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const char* qualifier = parse;
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parse = bx::strws(bx::strword(parse) );
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if (0 == strncmp(qualifier, "attribute", 9)
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|| 0 == strncmp(qualifier, "varying", 7) )
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{
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// skip attributes and varyings.
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parse = eol + 1;
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continue;
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}
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if (0 != strncmp(qualifier, "uniform", 7) )
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{
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// end if there is no uniform keyword.
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parse = NULL;
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continue;
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}
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const char* precision = NULL;
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const char* typen = parse;
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if (0 == strncmp(typen, "lowp", 4)
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|| 0 == strncmp(typen, "mediump", 7)
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|| 0 == strncmp(typen, "highp", 5) )
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{
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precision = typen;
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typen = parse = bx::strws(bx::strword(parse) );
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}
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BX_UNUSED(precision);
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char uniformType[256];
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parse = bx::strword(parse);
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if (0 == strncmp(typen, "sampler", 7) )
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{
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strcpy(uniformType, "int");
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}
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else
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{
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bx::strlcpy(uniformType, typen, parse-typen+1);
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}
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const char* name = parse = bx::strws(parse);
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char uniformName[256];
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uint8_t num = 1;
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const char* array = bx::strnstr(name, "[", eol-parse);
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if (NULL != array)
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{
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bx::strlcpy(uniformName, name, array-name+1);
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char arraySize[32];
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const char* end = bx::strnstr(array, "]", eol-array);
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bx::strlcpy(arraySize, array+1, end-array);
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num = uint8_t(atoi(arraySize) );
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}
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else
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{
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bx::strlcpy(uniformName, name, eol-name+1);
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}
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Uniform un;
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un.type = nameToUniformTypeEnum(uniformType);
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if (UniformType::Count != un.type)
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{
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BX_TRACE("name: %s (type %d, num %d)", uniformName, un.type, num);
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un.name = uniformName;
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un.num = num;
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un.regIndex = 0;
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un.regCount = num;
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uniforms.push_back(un);
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}
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parse = eol + 1;
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}
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}
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}
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else
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{
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const char* parse = strstr(optimizedShader, "struct xlatMtlShaderUniform {");
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const char* end = parse;
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if (NULL != parse)
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{
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parse += strlen("struct xlatMtlShaderUniform {");
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end = strstr(parse, "};");
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}
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while ( parse < end
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&& *parse != '\0')
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{
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parse = bx::strws(parse);
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const char* eol = strchr(parse, ';');
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if (NULL != eol)
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{
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const char* typen = parse;
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char uniformType[256];
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parse = bx::strword(parse);
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bx::strlcpy(uniformType, typen, parse-typen+1);
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const char* name = parse = bx::strws(parse);
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char uniformName[256];
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uint8_t num = 1;
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const char* array = bx::strnstr(name, "[", eol-parse);
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if (NULL != array)
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{
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bx::strlcpy(uniformName, name, array-name+1);
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char arraySize[32];
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const char* end = bx::strnstr(array, "]", eol-array);
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bx::strlcpy(arraySize, array+1, end-array);
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num = uint8_t(atoi(arraySize) );
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}
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else
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{
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bx::strlcpy(uniformName, name, eol-name+1);
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}
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Uniform un;
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un.type = nameToUniformTypeEnum(uniformType);
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if (UniformType::Count != un.type)
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{
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BX_TRACE("name: %s (type %d, num %d)", uniformName, un.type, num);
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un.name = uniformName;
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un.num = num;
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un.regIndex = 0;
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un.regCount = num;
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uniforms.push_back(un);
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}
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parse = eol + 1;
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}
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}
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}
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uint16_t count = (uint16_t)uniforms.size();
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bx::write(_writer, count);
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for (UniformArray::const_iterator it = uniforms.begin(); it != uniforms.end(); ++it)
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{
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const Uniform& un = *it;
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uint8_t nameSize = (uint8_t)un.name.size();
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bx::write(_writer, nameSize);
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bx::write(_writer, un.name.c_str(), nameSize);
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uint8_t uniformType = un.type;
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bx::write(_writer, uniformType);
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bx::write(_writer, un.num);
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bx::write(_writer, un.regIndex);
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bx::write(_writer, un.regCount);
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BX_TRACE("%s, %s, %d, %d, %d"
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, un.name.c_str()
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, getUniformTypeName(un.type)
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, un.num
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, un.regIndex
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, un.regCount
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);
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}
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uint32_t shaderSize = (uint32_t)strlen(optimizedShader);
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bx::write(_writer, shaderSize);
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bx::write(_writer, optimizedShader, shaderSize);
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uint8_t nul = 0;
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bx::write(_writer, nul);
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if (_cmdLine.hasArg('\0', "disasm") )
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{
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std::string disasmfp = _cmdLine.findOption('o');
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disasmfp += ".disasm";
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writeFile(disasmfp.c_str(), optimizedShader, shaderSize);
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}
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glslopt_cleanup(ctx);
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return true;
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}
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} // namespace glsl
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bool compileGLSLShader(bx::CommandLine& _cmdLine, uint32_t _version, const std::string& _code, bx::WriterI* _writer)
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{
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return glsl::compile(_cmdLine, _version, _code, _writer);
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}
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} // namespace bgfx
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