mirror of https://github.com/AxioDL/metaforce.git
395 lines
14 KiB
C++
395 lines
14 KiB
C++
#include "HECL/Backend/GLSL.hpp"
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#include "HECL/Runtime.hpp"
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#include <Athena/MemoryReader.hpp>
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#include <Athena/MemoryWriter.hpp>
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#include <boo/graphicsdev/GL.hpp>
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static LogVisor::LogModule Log("HECL::Backend::GLSL");
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namespace HECL
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{
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namespace Backend
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{
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std::string GLSL::EmitTexGenSource2(TexGenSrc src, int uvIdx) const
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{
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switch (src)
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{
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case TG_POS:
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return "posIn.xy\n";
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case TG_NRM:
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return "normIn.xy\n";
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case TG_UV:
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return HECL::Format("uvIn[%u]", uvIdx);
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default: break;
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}
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return std::string();
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}
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std::string GLSL::EmitTexGenSource4(TexGenSrc src, int uvIdx) const
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{
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switch (src)
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{
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case TG_POS:
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return "vec4(posIn, 1.0)\n";
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case TG_NRM:
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return "vec4(normIn, 1.0)\n";
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case TG_UV:
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return HECL::Format("vec4(uvIn[%u], 0.0, 1.0)", uvIdx);
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default: break;
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}
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return std::string();
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}
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std::string GLSL::GenerateVertInStruct(unsigned col, unsigned uv, unsigned w) const
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{
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std::string retval =
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"layout(location=0) in vec3 posIn;\n"
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"layout(location=1) in vec3 normIn;\n";
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unsigned idx = 2;
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if (col)
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{
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retval += HECL::Format("layout(location=%u) in vec4 colIn[%u];\n", idx, col);
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idx += col;
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}
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if (uv)
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{
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retval += HECL::Format("layout(location=%u) in vec2 uvIn[%u];\n", idx, uv);
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idx += uv;
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}
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if (w)
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{
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retval += HECL::Format("layout(location=%u) in vec4 weightIn[%u];\n", idx, w);
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}
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return retval;
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}
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std::string GLSL::GenerateVertToFragStruct() const
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{
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std::string retval =
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"struct VertToFrag\n"
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"{\n"
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" vec4 mvPos;\n"
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" vec4 mvNorm;\n";
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if (m_tcgs.size())
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retval += HECL::Format(" vec2 tcgs[%u];\n", unsigned(m_tcgs.size()));
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return retval + "};\n";
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}
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std::string GLSL::GenerateVertUniformStruct(unsigned skinSlots, unsigned texMtxs) const
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{
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if (skinSlots == 0)
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skinSlots = 1;
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std::string retval = HECL::Format("uniform HECLVertUniform\n"
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"{\n"
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" mat4 mv[%u];\n"
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" mat4 mvInv[%u];\n"
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" mat4 proj;\n",
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skinSlots, skinSlots);
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if (texMtxs)
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retval += HECL::Format(" mat4 texMtxs[%u];\n", texMtxs);
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return retval + "} vu;\n";
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}
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void GLSL::reset(const IR& ir, Diagnostics& diag)
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{
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/* Common programmable interpretation */
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ProgrammableCommon::reset(ir, diag, "GLSL");
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}
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std::string GLSL::makeVert(const char* glslVer, unsigned col, unsigned uv, unsigned w,
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unsigned s, unsigned tm) const
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{
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std::string retval = std::string(glslVer) + "\n" +
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GenerateVertInStruct(col, uv, w) + "\n" +
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GenerateVertToFragStruct() + "\n" +
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GenerateVertUniformStruct(s, tm) +
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"out VertToFrag vtf;\n\n"
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"void main()\n{\n";
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if (s)
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{
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/* skinned */
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retval += " vec4 posAccum = vec4(0.0,0.0,0.0,0.0);\n"
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" vec4 normAccum = vec4(0.0,0.0,0.0,0.0);\n";
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for (size_t i=0 ; i<s ; ++i)
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retval += HECL::Format(" posAccum += (vu.mv[%" PRISize "] * vec4(posIn, 1.0)) * weightIn[%" PRISize "][%" PRISize "];\n"
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" normAccum += (vu.mvInv[%" PRISize "] * vec4(normIn, 1.0)) * weightIn[%" PRISize "][%" PRISize "];\n",
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i, i/4, i%4, i, i/4, i%4);
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retval += " posAccum[3] = 1.0;\n"
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" vtf.mvPos = posAccum;\n"
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" vtf.mvNorm = vec4(normalize(normAccum.xyz), 0.0);\n"
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" gl_Position = vu.proj * posAccum;\n";
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}
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else
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{
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/* non-skinned */
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retval += " vtf.mvPos = vu.mv[0] * vec4(posIn, 1.0);\n"
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" vtf.mvNorm = vu.mvInv[0] * vec4(normIn, 0.0);\n"
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" gl_Position = vu.proj * vtf.mvPos;\n";
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}
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int tcgIdx = 0;
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for (const TexCoordGen& tcg : m_tcgs)
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{
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if (tcg.m_mtx < 0)
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retval += HECL::Format(" vtf.tcgs[%u] = %s;\n", tcgIdx,
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EmitTexGenSource2(tcg.m_src, tcg.m_uvIdx).c_str());
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else
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retval += HECL::Format(" vtf.tcgs[%u] = (vu.texMtxs[%u] * %s).xy;\n", tcgIdx, tcg.m_mtx,
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EmitTexGenSource4(tcg.m_src, tcg.m_uvIdx).c_str());
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++tcgIdx;
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}
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return retval + "}\n";
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}
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std::string GLSL::makeFrag(const char* glslVer,
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const ShaderFunction& lighting) const
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{
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std::string lightingSrc;
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if (lighting.m_source)
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lightingSrc = lighting.m_source;
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std::string texMapDecl;
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if (m_texMapEnd)
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texMapDecl = HECL::Format("uniform sampler2D texs[%u];\n", m_texMapEnd);
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std::string retval = std::string(glslVer) + "\n" +
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GenerateVertToFragStruct() +
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"\nlayout(location=0) out vec4 colorOut;\n" +
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texMapDecl +
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"in VertToFrag vtf;\n\n" +
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lightingSrc + "\n" +
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"void main()\n{\n";
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if (m_lighting)
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{
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if (lighting.m_entry)
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retval += HECL::Format(" vec4 lighting = %s();\n", lighting.m_entry);
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else
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retval += " vec4 lighting = vec4(1.0,1.0,1.0,1.0);\n";
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}
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unsigned sampIdx = 0;
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for (const TexSampling& sampling : m_texSamplings)
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retval += HECL::Format(" vec4 sampling%u = texture(texs[%u], vtf.tcgs[%u]);\n",
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sampIdx++, sampling.mapIdx, sampling.tcgIdx);
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if (m_alphaExpr.size())
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retval += " colorOut = vec4(" + m_colorExpr + ", " + m_alphaExpr + ");\n";
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else
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retval += " colorOut = vec4(" + m_colorExpr + ", 1.0);\n";
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return retval + "}\n";
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}
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std::string GLSL::makeFrag(const char* glslVer,
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const ShaderFunction& lighting,
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const ShaderFunction& post) const
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{
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std::string lightingSrc;
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if (lighting.m_source)
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lightingSrc = lighting.m_source;
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std::string postSrc;
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if (post.m_source)
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postSrc = post.m_source;
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std::string postEntry;
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if (post.m_entry)
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postEntry = post.m_entry;
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std::string texMapDecl;
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if (m_texMapEnd)
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texMapDecl = HECL::Format("uniform sampler2D texs[%u];\n", m_texMapEnd);
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std::string retval = std::string(glslVer) + "\n" +
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GenerateVertToFragStruct() +
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"\nlayout(location=0) out vec4 colorOut;\n" +
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texMapDecl +
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"in VertToFrag vtf;\n\n" +
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lightingSrc + "\n" +
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postSrc +
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"\nvoid main()\n{\n";
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if (m_lighting)
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{
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if (lighting.m_entry)
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retval += HECL::Format(" vec4 lighting = %s();\n", lighting.m_entry);
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else
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retval += " vec4 lighting = vec4(1.0,1.0,1.0,1.0);\n";
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}
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unsigned sampIdx = 0;
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for (const TexSampling& sampling : m_texSamplings)
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retval += HECL::Format(" vec4 sampling%u = texture(texs[%u], vtf.tcgs[%u]);\n",
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sampIdx++, sampling.mapIdx, sampling.tcgIdx);
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if (m_alphaExpr.size())
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retval += " colorOut = " + postEntry + "(vec4(" + m_colorExpr + ", " + m_alphaExpr + "));\n";
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else
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retval += " colorOut = " + postEntry + "(vec4(" + m_colorExpr + ", 1.0));\n";
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return retval + "}\n";
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}
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}
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namespace Runtime
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{
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static const char* STD_BLOCKNAMES[] = {"HECLVertUniform"};
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struct GLSLBackendFactory : IShaderBackendFactory
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{
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Backend::GLSL m_backend;
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boo::GLDataFactory* m_gfxFactory;
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GLSLBackendFactory(boo::IGraphicsDataFactory* gfxFactory)
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: m_gfxFactory(dynamic_cast<boo::GLDataFactory*>(gfxFactory)) {}
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ShaderCachedData buildShaderFromIR(const ShaderTag& tag,
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const HECL::Frontend::IR& ir,
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HECL::Frontend::Diagnostics& diag,
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boo::IShaderPipeline** objOut)
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{
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m_backend.reset(ir, diag);
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size_t cachedSz = 3;
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std::string vertSource =
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m_backend.makeVert("#version 330",
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tag.getColorCount(), tag.getUvCount(), tag.getWeightCount(),
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tag.getSkinSlotCount(), tag.getTexMtxCount());
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cachedSz += vertSource.size() + 1;
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std::string fragSource = m_backend.makeFrag("#version 330");
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cachedSz += fragSource.size() + 1;
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*objOut =
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m_gfxFactory->newShaderPipeline(vertSource.c_str(), fragSource.c_str(),
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m_backend.m_texMapEnd, "texs",
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1, STD_BLOCKNAMES,
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m_backend.m_blendSrc, m_backend.m_blendDst,
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tag.getDepthTest(), tag.getDepthWrite(),
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tag.getBackfaceCulling());
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if (!*objOut)
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Log.report(LogVisor::FatalError, "unable to build shader");
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ShaderCachedData dataOut(tag, cachedSz);
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Athena::io::MemoryWriter w(dataOut.m_data.get(), dataOut.m_sz);
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w.writeUByte(m_backend.m_texMapEnd);
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w.writeUByte(m_backend.m_blendSrc);
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w.writeUByte(m_backend.m_blendDst);
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w.writeString(vertSource);
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w.writeString(fragSource);
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return dataOut;
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}
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boo::IShaderPipeline* buildShaderFromCache(const ShaderCachedData& data)
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{
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const ShaderTag& tag = data.m_tag;
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Athena::io::MemoryReader r(data.m_data.get(), data.m_sz);
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atUint8 texMapEnd = r.readUByte();
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boo::BlendFactor blendSrc = boo::BlendFactor(r.readUByte());
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boo::BlendFactor blendDst = boo::BlendFactor(r.readUByte());
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std::string vertSource = r.readString();
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std::string fragSource = r.readString();
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boo::IShaderPipeline* ret =
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m_gfxFactory->newShaderPipeline(vertSource.c_str(), fragSource.c_str(),
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texMapEnd, "texs",
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1, STD_BLOCKNAMES,
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blendSrc, blendDst,
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tag.getDepthTest(), tag.getDepthWrite(),
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tag.getBackfaceCulling());
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if (!ret)
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Log.report(LogVisor::FatalError, "unable to build shader");
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return ret;
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}
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ShaderCachedData buildExtendedShaderFromIR(const ShaderTag& tag,
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const HECL::Frontend::IR& ir,
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HECL::Frontend::Diagnostics& diag,
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const std::vector<ShaderCacheExtensions::ExtensionSlot>& extensionSlots,
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FReturnExtensionShader returnFunc)
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{
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m_backend.reset(ir, diag);
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size_t cachedSz = 3;
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std::string vertSource =
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m_backend.makeVert("#version 330",
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tag.getColorCount(), tag.getUvCount(), tag.getWeightCount(),
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tag.getSkinSlotCount(), tag.getTexMtxCount());
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cachedSz += vertSource.size() + 1;
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std::vector<std::string> fragSources;
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fragSources.reserve(extensionSlots.size());
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for (const ShaderCacheExtensions::ExtensionSlot& slot : extensionSlots)
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{
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fragSources.push_back(m_backend.makeFrag("#version 330", slot.lighting, slot.post));
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cachedSz += fragSources.back().size() + 1;
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boo::IShaderPipeline* ret =
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m_gfxFactory->newShaderPipeline(vertSource.c_str(), fragSources.back().c_str(),
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m_backend.m_texMapEnd, "texs",
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1, STD_BLOCKNAMES,
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m_backend.m_blendSrc, m_backend.m_blendDst,
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tag.getDepthTest(), tag.getDepthWrite(),
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tag.getBackfaceCulling());
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if (!ret)
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Log.report(LogVisor::FatalError, "unable to build shader");
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returnFunc(ret);
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}
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ShaderCachedData dataOut(tag, cachedSz);
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Athena::io::MemoryWriter w(dataOut.m_data.get(), dataOut.m_sz);
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w.writeUByte(m_backend.m_texMapEnd);
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w.writeUByte(m_backend.m_blendSrc);
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w.writeUByte(m_backend.m_blendDst);
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w.writeString(vertSource);
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for (const std::string src : fragSources)
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w.writeString(src);
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return dataOut;
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}
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void buildExtendedShaderFromCache(const ShaderCachedData& data,
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const std::vector<ShaderCacheExtensions::ExtensionSlot>& extensionSlots,
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FReturnExtensionShader returnFunc)
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{
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const ShaderTag& tag = data.m_tag;
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Athena::io::MemoryReader r(data.m_data.get(), data.m_sz);
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atUint8 texMapEnd = r.readUByte();
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boo::BlendFactor blendSrc = boo::BlendFactor(r.readUByte());
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boo::BlendFactor blendDst = boo::BlendFactor(r.readUByte());
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std::string vertSource = r.readString();
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for (const ShaderCacheExtensions::ExtensionSlot& slot : extensionSlots)
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{
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std::string fragSource = r.readString();
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boo::IShaderPipeline* ret =
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m_gfxFactory->newShaderPipeline(vertSource.c_str(), fragSource.c_str(),
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texMapEnd, "texs",
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1, STD_BLOCKNAMES,
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blendSrc, blendDst,
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tag.getDepthTest(), tag.getDepthWrite(),
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tag.getBackfaceCulling());
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if (!ret)
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Log.report(LogVisor::FatalError, "unable to build shader");
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returnFunc(ret);
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}
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}
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};
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IShaderBackendFactory* _NewGLSLBackendFactory(boo::IGraphicsDataFactory* gfxFactory)
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{
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return new struct GLSLBackendFactory(gfxFactory);
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}
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}
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}
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