mirror of
https://github.com/love2d/love.git
synced 2026-08-16 00:02:12 +02:00
Alexander Szpakowski
108 lines
2.9 KiB
C++
108 lines
2.9 KiB
C++
/**
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* Copyright (c) 2006-2012 LOVE Development Team
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*
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* This software is provided 'as-is', without any express or implied
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* warranty. In no event will the authors be held liable for any damages
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* arising from the use of this software.
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*
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* Permission is granted to anyone to use this software for any purpose,
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* including commercial applications, and to alter it and redistribute it
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* freely, subject to the following restrictions:
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*
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* 1. The origin of this software must not be misrepresented; you must not
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* claim that you wrote the original software. If you use this software
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* in a product, an acknowledgment in the product documentation would be
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* appreciated but is not required.
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* 2. Altered source versions must be plainly marked as such, and must not be
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* misrepresented as being the original software.
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* 3. This notice may not be removed or altered from any source distribution.
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**/
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#ifndef LOVE_GRAPHICS_EFFECT_H
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#define LOVE_GRAPHICS_EFFECT_H
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#include "common/Object.h"
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#include <string>
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#include <map>
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#include <vector>
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#include "OpenGL.h"
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#include "Image.h"
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#include "Canvas.h"
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namespace love
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{
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namespace graphics
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{
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namespace opengl
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{
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// A GLSL shader
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class ShaderEffect : public Object, public Volatile
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{
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public:
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enum ShaderType
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{
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TYPE_VERTEX,
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TYPE_TESSCONTROL,
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TYPE_TESSEVAL,
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TYPE_GEOMETRY,
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TYPE_FRAGMENT,
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TYPE_MAX_ENUM
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};
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// thin wrapper for GLSL source code
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struct ShaderSource
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{
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std::string code;
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ShaderType type;
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};
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ShaderEffect(const std::vector<ShaderSource> &shadersources);
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virtual ~ShaderEffect();
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std::string getWarnings() const;
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virtual bool loadVolatile();
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virtual void unloadVolatile();
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void attach(bool temporary = false);
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static void detach();
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static std::string getGLSLVersion();
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static bool isSupported();
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static ShaderEffect *current;
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void sendFloat(const std::string &name, int size, const GLfloat *vec, int count);
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void sendMatrix(const std::string &name, int size, const GLfloat *m, int count);
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void sendImage(const std::string &name, const Image &image);
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void sendCanvas(const std::string &name, const Canvas &canvas);
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private:
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GLint getUniformLocation(const std::string &name);
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void checkSetUniformError();
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GLuint createShader(const ShaderSource &source);
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void createProgram(const std::vector<GLuint> &shaders);
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std::vector<ShaderSource> _shadersources; // list of all shader code attached to this ShaderEffect
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GLuint _program; // volatile
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// uniform location buffer
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std::map<std::string, GLint> _uniforms;
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static GLint _max_texture_units;
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static std::vector<int> _texture_id_counters; // counts total number of textures bound to each texture unit in all shaders
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// texture unit pool for setting images
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std::map<std::string, GLint> _texture_unit_pool;
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std::vector<GLuint> _texture_id_list;
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GLint getTextureUnit(const std::string &name);
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void sendTexture(const std::string &name, GLuint texture);
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};
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} // opengl
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} // graphics
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} // love
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#endif // LOVE_GRAPHICS_EFFECT_H
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