dolphin/Source/Plugins/Plugin_VideoOGL/Src/ProgramShaderCache.cpp

151 lines
6.3 KiB
C++

// Copyright (C) 2003 Dolphin Project.
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, version 2.0.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License 2.0 for more details.
// A copy of the GPL 2.0 should have been included with the program.
// If not, see http://www.gnu.org/licenses/
// Official SVN repository and contact information can be found at
// http://code.google.com/p/dolphin-emu/
#include "ProgramShaderCache.h"
namespace OGL
{
GLuint ProgramShaderCache::CurrentFShader = 0, ProgramShaderCache::CurrentVShader = 0, ProgramShaderCache::CurrentProgram = 0;
ProgramShaderCache::PCache ProgramShaderCache::pshaders;
std::pair<u64, u64> ProgramShaderCache::CurrentShaderProgram;
const char *UniformNames[NUM_UNIFORMS] = {
// SAMPLERS
"samp0","samp1","samp2","samp3","samp4","samp5","samp6","samp7",
// PIXEL SHADER UNIFORMS
I_COLORS,
I_KCOLORS,
I_ALPHA,
I_TEXDIMS,
I_ZBIAS ,
I_INDTEXSCALE ,
I_INDTEXMTX,
I_FOG,
I_PLIGHTS,
I_PMATERIALS,
// VERTEX SHADER UNIFORMS
I_POSNORMALMATRIX,
I_PROJECTION ,
I_MATERIALS,
I_LIGHTS,
I_TEXMATRICES,
I_TRANSFORMMATRICES ,
I_NORMALMATRICES ,
I_POSTTRANSFORMMATRICES,
I_DEPTHPARAMS,
};
void ProgramShaderCache::SetBothShaders(GLuint PS, GLuint VS)
{
PROGRAMUID uid;
CurrentFShader = PS;
CurrentVShader = VS;
GetProgramShaderId(&uid, CurrentVShader, CurrentFShader);
if(uid.uid.id == 0)
{
CurrentProgram = 0;
glUseProgram(0);
return;
}
// Fragment shaders can survive without Vertex Shaders
// We have a valid fragment shader, let's create our program
std::pair<u64, u64> ShaderPair = std::make_pair(uid.uid.psid, uid.uid.vsid);
PCache::iterator iter = pshaders.find(ShaderPair);
if (iter != pshaders.end())
{
PCacheEntry &entry = iter->second;
glUseProgram(entry.program.glprogid);
CurrentShaderProgram = ShaderPair;
CurrentProgram = entry.program.glprogid;
return;
}
PCacheEntry entry;
entry.program.vsid = CurrentVShader;
entry.program.psid = CurrentFShader;
entry.program.glprogid = glCreateProgram();
// Right, the program is created now
// Let's attach everything
if(entry.program.vsid != 0) // attaching zero vertex shader makes it freak out
glAttachShader(entry.program.glprogid, entry.program.vsid);
glAttachShader(entry.program.glprogid, entry.program.psid);
glLinkProgram(entry.program.glprogid);
//checkForGLError("linking program");
glUseProgram(entry.program.glprogid);
//checkForGLError("using program");
// We cache our uniform locations for now
// Once we move up to a newer version of GLSL, ~1.30
// We can remove this
//For some reason this fails on my hardware
//glGetUniformIndices(entry.program.glprogid, NUM_UNIFORMS, UniformNames, entry.program.UniformLocations);
//Got to do it this crappy way.
for(int a = 0; a < NUM_UNIFORMS; ++a)
entry.program.UniformLocations[a] = glGetUniformLocation(entry.program.glprogid, UniformNames[a]);
// Need to get some attribute locations
if(uid.uid.vsid != 0) // We have no vertex Shader
{
entry.program.attrLoc[0] = glGetAttribLocation(entry.program.glprogid, "rawnorm1");
entry.program.attrLoc[1] = glGetAttribLocation(entry.program.glprogid, "rawnorm2");
entry.program.attrLoc[2] = glGetAttribLocation(entry.program.glprogid, "fposmtx");
if(entry.program.attrLoc[0] > 0)
glEnableVertexAttribArray(entry.program.attrLoc[0]);
if(entry.program.attrLoc[1] > 0)
glEnableVertexAttribArray(entry.program.attrLoc[1]);
if(entry.program.attrLoc[2] > 0)
glEnableVertexAttribArray(entry.program.attrLoc[2]);
}
else
entry.program.attrLoc[0] = entry.program.attrLoc[1] = entry.program.attrLoc[2] = 0;
pshaders[ShaderPair] = entry;
CurrentShaderProgram = ShaderPair;
CurrentProgram = entry.program.glprogid;
}
GLuint ProgramShaderCache::GetCurrentProgram(void) { return CurrentProgram; }
GLint ProgramShaderCache::GetAttr(int num)
{
return pshaders[CurrentShaderProgram].program.attrLoc[num];
}
PROGRAMSHADER ProgramShaderCache::GetShaderProgram()
{
return pshaders[CurrentShaderProgram].program;
}
void ProgramShaderCache::Shutdown(void)
{
PCache::iterator iter = pshaders.begin();
for (; iter != pshaders.end(); iter++)
iter->second.Destroy();
pshaders.clear();
}
}
void GetProgramShaderId(PROGRAMUID *uid, GLuint _v, GLuint _p)
{
uid->uid.vsid = _v;
uid->uid.psid = _p;
}