80 lines
2.9 KiB
C++
80 lines
2.9 KiB
C++
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// Copyright (c) 2012- PPSSPP Project.
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, version 2.0 or later versions.
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License 2.0 for more details.
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// A copy of the GPL 2.0 should have been included with the program.
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// If not, see http://www.gnu.org/licenses/
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// Official git repository and contact information can be found at
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// https://github.com/hrydgard/ppsspp and http://www.ppsspp.org/.
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#include <cstdio>
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#include <cstdlib>
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#include <locale.h>
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#include "Common/StringUtils.h"
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#include "Common/GPU/OpenGL/GLFeatures.h"
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#include "Common/GPU/ShaderWriter.h"
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#include "Common/GPU/thin3d.h"
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#include "Core/Config.h"
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#include "GPU/ge_constants.h"
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#include "GPU/GPUState.h"
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#include "GPU/Common/ShaderId.h"
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#include "GPU/Common/ShaderUniforms.h"
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#include "GPU/Common/GeometryShaderGenerator.h"
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#undef WRITE
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#define WRITE(p, ...) p.F(__VA_ARGS__)
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bool GenerateGeometryShader(const GShaderID &id, char *buffer, const ShaderLanguageDesc &compat, const Draw::Bugs bugs, std::string *errorString) {
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std::vector<const char*> gl_exts;
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if (ShaderLanguageIsOpenGL(compat.shaderLanguage)) {
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if (gl_extensions.EXT_gpu_shader4) {
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gl_exts.push_back("#extension GL_EXT_gpu_shader4 : enable");
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}
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}
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ShaderWriter p(buffer, compat, ShaderStage::Geometry, gl_exts.data(), gl_exts.size());
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p.C("layout(triangles) in;\n");
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p.C("layout(triangle_strip, max_vertices = 3) out;\n");
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std::vector<VaryingDef> varyings, outVaryings;
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if (id.Bit(GS_BIT_DO_TEXTURE)) {
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varyings.push_back(VaryingDef{ "vec3", "v_texcoord", Draw::SEM_TEXCOORD0, 0, "highp" });
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outVaryings.push_back(VaryingDef{ "vec3", "v_texcoordOut", Draw::SEM_TEXCOORD0, 0, "highp" });
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}
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varyings.push_back(VaryingDef{ "vec4", "v_color0", Draw::SEM_COLOR0, 1, "lowp" });
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outVaryings.push_back(VaryingDef{ "vec4", "v_color0Out", Draw::SEM_COLOR0, 1, "lowp" });
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if (id.Bit(GS_BIT_LMODE)) {
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varyings.push_back(VaryingDef{ "vec3", "v_color1", Draw::SEM_COLOR1, 2, "lowp" });
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outVaryings.push_back(VaryingDef{ "vec3", "v_color1Out", Draw::SEM_COLOR1, 2, "lowp" });
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}
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varyings.push_back(VaryingDef{ "float", "v_fogdepth", Draw::SEM_TEXCOORD1, 3, "highp" });
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outVaryings.push_back(VaryingDef{ "float", "v_fogdepthOut", Draw::SEM_TEXCOORD1, 3, "highp" });
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p.BeginGSMain(varyings, outVaryings);
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p.C(" for (int i = 0; i < gl_in.length(); i++) {\n");
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p.C(" gl_Position = gl_in[i].gl_Position;\n"); // copy attributes
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for (size_t i = 0; i < varyings.size(); i++) {
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VaryingDef &in = varyings[i];
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VaryingDef &out = outVaryings[i];
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p.F(" %s = %s[i];\n", outVaryings[i].name, varyings[i].name);
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}
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p.C(" EmitVertex();\n");
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p.C(" }\n");
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p.EndGSMain();
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return true;
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}
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