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Code Issues 123 Wiki Activity

material changes, shader params, texture binding changes, more changes, ...

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This commit is contained in:
milek7
2018-07-18 21:53:12 +02:00
parent a1d11cb03b
commit ee16821509
12 changed files with 486 additions and 165 deletions
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118
gl/shader.cpp
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@@ -4,6 +4,7 @@
#include <sstream>
#include "shader.h"
#include "glsl_common.h"
#include "Logs.h"
inline bool strcend(std::string const &value, std::string const &ending)
{
@@ -60,7 +61,25 @@ std::unordered_map<std::string, gl::shader::components_e> gl::shader::components
{ "sRGB_A", components_e::sRGB_A }
};
void gl::shader::parse_config(std::string &str)
std::unordered_map<std::string, gl::shader::defaultparam_e> gl::shader::defaultparams_mapping =
{
{ "required", defaultparam_e::required },
{ "nan", defaultparam_e::nan },
{ "none", defaultparam_e::zero },
{ "one", defaultparam_e::one },
{ "ambient", defaultparam_e::ambient },
{ "diffuse", defaultparam_e::diffuse },
{ "specular", defaultparam_e::specular }
};
void gl::shader::process_source(std::string &str)
{
expand_includes(str);
parse_texture_entries(str);
parse_param_entries(str);
}
void gl::shader::parse_texture_entries(std::string &str)
{
size_t start_pos = 0;
@@ -75,6 +94,7 @@ void gl::shader::parse_config(std::string &str)
std::istringstream ss(str.substr(fp + 1, fe - fp - 1));
std::string token;
std::string name;
texture_entry conf;
size_t arg = 0;
@@ -82,35 +102,103 @@ void gl::shader::parse_config(std::string &str)
{
std::istringstream token_ss(token);
if (arg == 0)
token_ss >> conf.name;
token_ss >> name;
else if (arg == 1)
{
token_ss >> conf.id;
if (conf.id >= gl::MAX_TEXTURES)
log_error("invalid texture binding: " + std::to_string(conf.id));
}
else if (arg == 2)
{
std::string comp;
token_ss >> comp;
conf.components = components_mapping[comp];
if (components_mapping.find(comp) == components_mapping.end())
log_error("unknown components: " + comp);
else
conf.components = components_mapping[comp];
}
arg++;
}
if (arg == 3)
texture_conf.push_back(conf);
texture_conf.emplace(std::make_pair(name, conf));
else
log_error("invalid argument count to #texture");
str.erase(start_pos, fe - start_pos + 1);
}
}
void gl::shader::parse_param_entries(std::string &str)
{
size_t start_pos = 0;
std::string magic = "#param";
while ((start_pos = str.find(magic, start_pos)) != str.npos)
{
size_t fp = str.find('(', start_pos);
size_t fe = str.find(')', start_pos);
if (fp == str.npos || fe == str.npos)
return;
std::istringstream ss(str.substr(fp + 1, fe - fp - 1));
std::string token;
std::string name;
param_entry conf;
size_t arg = 0;
while (std::getline(ss, token, ','))
{
std::istringstream token_ss(token);
if (arg == 0)
token_ss >> name;
else if (arg == 1)
{
token_ss >> conf.location;
if (conf.location >= gl::MAX_PARAMS)
log_error("invalid param binding: " + std::to_string(conf.location));
}
else if (arg == 2)
token_ss >> conf.offset;
else if (arg == 3)
token_ss >> conf.size;
else if (arg == 4)
{
std::string tok;
token_ss >> tok;
if (defaultparams_mapping.find(tok) == defaultparams_mapping.end())
log_error("unknown param default: " + tok);
conf.defaultparam = defaultparams_mapping[tok];
}
arg++;
}
if (arg == 5)
param_conf.emplace(std::make_pair(name, conf));
else
log_error("invalid argument count to #param");
str.erase(start_pos, fe - start_pos + 1);
}
}
void gl::shader::log_error(const std::string &str)
{
ErrorLog("bad shader: " + name + ": " + str, logtype::shader);
}
gl::shader::shader(const std::string &filename)
{
name = filename;
std::string str = read_file(filename);
expand_includes(str);
parse_config(str);
process_source(str);
const GLchar *cstr = str.c_str();
if (!cstr[0])
throw std::runtime_error("cannot read shader " + filename);
throw shader_exception("cannot read shader: " + filename);
GLuint type;
if (strcend(filename, ".vert"))
@@ -118,7 +206,7 @@ gl::shader::shader(const std::string &filename)
else if (strcend(filename, ".frag"))
type = GL_FRAGMENT_SHADER;
else
throw std::runtime_error("unknown shader " + filename);
throw shader_exception("unknown shader " + filename);
**this = glCreateShader(type);
glShaderSource(*this, 1, &cstr, 0);
@@ -130,7 +218,7 @@ gl::shader::shader(const std::string &filename)
{
GLchar info[512];
glGetShaderInfoLog(*this, 512, 0, info);
throw std::runtime_error("failed to compile " + filename + ": " + std::string(info));
throw shader_exception("failed to compile " + filename + ": " + std::string(info));
}
}
@@ -144,9 +232,10 @@ void gl::program::init()
{
bind();
for (shader::texture_entry &e : texture_conf)
for (auto it : texture_conf)
{
GLuint loc = glGetUniformLocation(*this, e.name.c_str());
shader::texture_entry &e = it.second;
GLuint loc = glGetUniformLocation(*this, it.first.c_str());
glUniform1i(loc, e.id);
}
@@ -179,7 +268,10 @@ gl::program::program(std::vector<std::reference_wrapper<const gl::shader>> shade
void gl::program::attach(const gl::shader &s)
{
std::copy(s.texture_conf.begin(), s.texture_conf.end(), std::back_inserter(texture_conf));
for (auto it : s.texture_conf)
texture_conf.emplace(std::make_pair(it.first, std::move(it.second)));
for (auto it : s.param_conf)
param_conf.emplace(std::make_pair(it.first, std::move(it.second)));
glAttachShader(*this, *s);
}
@@ -193,7 +285,7 @@ void gl::program::link()
{
GLchar info[512];
glGetProgramInfoLog(*this, 512, 0, info);
throw std::runtime_error("failed to link program: " + std::string(info));
throw shader_exception("failed to link program: " + std::string(info));
}
init();