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-rw-r--r--src/libjin/Graphics/Shader/je_shader.cpp278
1 files changed, 0 insertions, 278 deletions
diff --git a/src/libjin/Graphics/Shader/je_shader.cpp b/src/libjin/Graphics/Shader/je_shader.cpp
deleted file mode 100644
index b0e7506..0000000
--- a/src/libjin/Graphics/Shader/je_shader.cpp
+++ /dev/null
@@ -1,278 +0,0 @@
-#include "../../core/je_configuration.h"
-#if defined(jin_graphics) && (jin_graphics & jin_graphics_shader)
-
-#include <iostream>
-
-#include "../../filesystem/je_buffer.h"
-#include "../../utils/je_macros.h"
-
-#include "je_jsl_compiler.h"
-#include "je_shader.h"
-
-namespace JinEngine
-{
- namespace Graphics
- {
-
- using namespace std;
- using namespace JinEngine::Filesystem;
-
- //
- // default_texture
- // base_shader
- // SHADER_FORMAT_SIZE
- // formatShader
- //
- #include "je_default.shader.h"
-
- //
- // https://stackoverflow.com/questions/27941496/use-sampler-without-passing-through-value
- // The default value of a sampler variable is 0. From the GLSL 3.30 spec,
- // section "4.3.5 Uniforms":
- //
- // The link time initial value is either the value of the variable's
- // initializer, if present, or 0 if no initializer is present.Sampler
- // types cannot have initializers.
- //
- // Since a value of 0 means that it's sampling from texture unit 0, it will
- // work without ever setting the value as long as you bind your textures to
- // unit 0. This is well defined behavior.
- //
- // Since texture unit 0 is also the default until you call glActiveTexture()
- // with a value other than GL_TEXTURE0, it's very common to always use unit
- // 0 as long as shaders do not need more than one texture.Which means that
- // often times, setting the sampler uniforms is redundant for simple
- // applications.
- //
- // I would still prefer to always set the values.If nothing else, it makes
- // it clear to anybody reading your code that you really mean to sample from
- // texture unit 0, and did not just forget to set the value.
- //
- const int DEFAULT_TEXTURE_UNIT = 0;
-
- /*static*/ Shader* Shader::CurrentShader = nullptr;
-
- Shader* Shader::createShader(const string& program)
- {
- Shader* shader = nullptr;
- try
- {
- shader = new Shader(program);
- }
- catch(...)
- {
- return nullptr;
- }
- return shader;
- }
-
- Shader::Shader(const string& program)
- : mCurrentTextureUnit(DEFAULT_TEXTURE_UNIT)
- {
- if (!compile(program))
- throw 0;
- }
-
- Shader::~Shader()
- {
- if (CurrentShader == this)
- unuse();
- // delete shader program
- glDeleteShader(mPID);
- }
-
- bool Shader::compile(const string& program)
- {
- string vertex_shader, fragment_shader;
- // Compile JSL shader source into GLSL shader source.
- JSLCompiler* compiler = JSLCompiler::get();
- if (!compiler->compile(program, &vertex_shader, &fragment_shader))
- {
- return false;
- }
-#define glsl(SHADER_MODE, SHADER, SRC) \
-do{ \
-const GLchar* src = SRC.c_str(); \
-glShaderSource(SHADER, 1, &src, NULL); \
-glCompileShader(SHADER); \
-GLint success; \
-glGetShaderiv(SHADER, GL_COMPILE_STATUS, &success); \
-if (success == GL_FALSE) \
- return false; \
-}while(0)
- // Compile vertex shader.
- GLuint vid = glCreateShader(GL_VERTEX_SHADER);
- glsl(GL_VERTEX_SHADER, vid, vertex_shader);
- // Compile fragment shader.
- GLuint fid = glCreateShader(GL_FRAGMENT_SHADER);
- glsl(GL_FRAGMENT_SHADER, fid, fragment_shader);
-#undef glsl
- // Create OpenGL shader program.
- mPID = glCreateProgram();
- glAttachShader(mPID, vid);
- glAttachShader(mPID, fid);
- glLinkProgram(mPID);
- GLint success;
- glGetProgramiv(mPID, GL_LINK_STATUS, &success);
- if (success == GL_FALSE)
- return false;
- }
-
- static inline GLint getMaxTextureUnits()
- {
- GLint maxTextureUnits = 0;
- glGetIntegerv(GL_MAX_TEXTURE_IMAGE_UNITS, &maxTextureUnits);
- return maxTextureUnits;
- }
-
- void Shader::use()
- {
- glUseProgram(mPID);
- CurrentShader = this;
- sendInt(SHADER_MAIN_TEXTURE, DEFAULT_TEXTURE_UNIT);
- }
-
- /*static*/ void Shader::unuse()
- {
- glUseProgram(0);
- CurrentShader = nullptr;
- }
-
- GLint Shader::claimTextureUnit(const std::string& name)
- {
- std::map<std::string, GLint>::iterator unit = mTextureUnits.find(name);
- if (unit != mTextureUnits.end())
- return unit->second;
- static GLint MAX_TEXTURE_UNITS = getMaxTextureUnits();
- if (++mCurrentTextureUnit >= MAX_TEXTURE_UNITS)
- return 0;
- mTextureUnits[name] = mCurrentTextureUnit;
- return mCurrentTextureUnit;
- }
-
- #define checkJSL() \
- if (CurrentShader != this) \
- return
-
- void Shader::sendInt(const char* name, int value)
- {
- checkJSL();
- int loc = glGetUniformLocation(mPID, name);
- glUniform1i(loc, value);
- }
-
- void Shader::sendFloat(const char* variable, float number)
- {
- checkJSL();
- int loc = glGetUniformLocation(mPID, variable);
- glUniform1f(loc, number);
- }
-
- //
- // https://www.douban.com/note/627332677/
- // struct TextureUnit
- // {
- // GLuint targetTexture1D;
- // GLuint targetTexture2D;
- // GLuint targetTexture3D;
- // GLuint targetTextureCube;
- // ...
- // };
- //
- // TextureUnit mTextureUnits[GL_MAX_TEXTURE_IMAGE_UNITS]
- // GLuint mCurrentTextureUnit = 0;
- //
- void Shader::sendTexture(const char* variable, const Texture* tex)
- {
- checkJSL();
- GLint location = glGetUniformLocation(mPID, variable);
- if (location == -1)
- return;
- GLint unit = claimTextureUnit(variable);
- if (unit == 0)
- {
- // TODO: 쳣󶨵
- return;
- }
- gl.activeTexUnit(unit);
- glUniform1i(location, unit);
- gl.bindTexture(tex->getTexture());
- gl.activeTexUnit(0);
- }
-
- void Shader::sendCanvas(const char* variable, const Canvas* canvas)
- {
- checkJSL();
- GLint location = glGetUniformLocation(mPID, variable);
- if (location == -1)
- return;
- GLint unit = claimTextureUnit(variable);
- if (unit == 0)
- {
- // TODO: 쳣󶨵
- return;
- }
- glUniform1i(location, unit);
- glActiveTexture(GL_TEXTURE0 + unit);
- gl.bindTexture(canvas->getTexture());
-
- glActiveTexture(GL_TEXTURE0);
- }
-
- void Shader::sendVec2(const char* name, float x, float y)
- {
- checkJSL();
- int loc = glGetUniformLocation(mPID, name);
- glUniform2f(loc, x, y);
- }
-
- void Shader::sendVec3(const char* name, float x, float y, float z)
- {
- checkJSL();
- int loc = glGetUniformLocation(mPID, name);
- glUniform3f(loc, x, y, z);
- }
-
- void Shader::sendVec4(const char* name, float x, float y, float z, float w)
- {
- checkJSL();
- int loc = glGetUniformLocation(mPID, name);
- glUniform4f(loc, x, y, z, w);
- }
-
- void Shader::sendColor(const char* name, const Color* col)
- {
- checkJSL();
- int loc = glGetUniformLocation(mPID, name);
- glUniform4f(loc,
- col->r / 255.f,
- col->g / 255.f,
- col->b / 255.f,
- col->a / 255.f
- );
- }
-
- void Shader::sendMatrix4(const char* name, const Math::Matrix* mat4)
- {
- int loc = glGetUniformLocation(mPID, name);
- glUniformMatrix4fv(loc, 1, GL_FALSE, mat4->getElements());
- }
-
- void Shader::bindVertexPointer(int n, GLenum type, GLsizei stride, const GLvoid * pointers)
- {
- GLint loc = glGetAttribLocation(mPID, SHADER_VERTEX_COORDS);
- glEnableVertexAttribArray(0);
- glVertexAttribPointer(loc, n, type, GL_FALSE, stride, pointers);
- }
-
- void Shader::bindUVPointer(int n, GLenum type, GLsizei stride, const GLvoid * pointers)
- {
- GLint loc = glGetAttribLocation(mPID, SHADER_TEXTURE_COORDS);
- glEnableVertexAttribArray(1);
- glVertexAttribPointer(loc, n, type, GL_FALSE, stride, pointers);
- }
-
- } // namespace Graphics
-} // namespace JinEngine
-
-#endif // (jin_graphics) && (jin_graphics & jin_graphics_shader) \ No newline at end of file
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