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Diffstat (limited to 'src/libjin/graphics/opengl.h')
| -rw-r--r-- | src/libjin/graphics/opengl.h | 270 |
1 files changed, 270 insertions, 0 deletions
diff --git a/src/libjin/graphics/opengl.h b/src/libjin/graphics/opengl.h new file mode 100644 index 0000000..e97ebb6 --- /dev/null +++ b/src/libjin/graphics/opengl.h @@ -0,0 +1,270 @@ +#ifndef __JE_OPENGL_H__ +#define __JE_OPENGL_H__ + +#include <vector> + +#include "../math/matrix.h" +#include "../math/transform.h" + +//#include "GLee/GLee.h" +#include "glad/glad.h" + +#include "color.h" + +namespace JinEngine +{ + namespace Graphics + { + // Wrap OpenGL API. + + namespace Shaders { class Shader; }; + namespace Fonts { class Font; }; + + class Texture; + + class Canvas; + + class OpenGL + { + public: + /// + /// Blend mode. + /// https://www.andersriggelsen.dk/glblendfunc.php + /// + enum class BlendMode + { + ALPHA = 1, + ADDITIVE = 2, + PREMULTIPLIEDALPHA = 3, + }; + + struct Stats + { + int drawCalls; + //int drawCallsBatched; + int canvasSwitches; + int shaderSwitches; + int fontSwitches; + int textures; + int canvases; + int fonts; + //int64 textureMemory; + }; + + static Canvas* const SCREEN; + + OpenGL(); + ~OpenGL(); + + bool loadGL(); + + void init(); + + void enable(GLenum cap); + + void disable(GLenum cap); + + void setClearColor(GLubyte r, GLubyte g, GLubyte b, GLubyte a); + + void pushColor(GLubyte r, GLubyte g, GLubyte b, GLubyte a = 255); + + void popColor(); + + void flushError(); + + GLuint genTexture(); + + void deleteTexture(GLuint texture); + + void bindTexture2D(GLuint texture = 0); + + void setTexParameter(GLenum pname, GLint param); + + void texImage(GLint internalformat, GLsizei width, GLsizei height, GLenum format, GLenum type, const GLvoid *pixels = NULL); + + void texSubImage(GLint xoffset, GLint yoffset, GLsizei width, GLsizei height, GLenum format, GLenum type, const GLvoid *pixels); + + void activeTextureUnit(unsigned int unit = 0); + + void drawArrays(GLenum mode, GLint first, GLsizei count); + + void drawBuffer(GLenum mode); + + void drawElements(GLenum mode, GLsizei count, GLenum type, const GLvoid *indices); + + void enableClientState(GLenum arr); + + void disableClientState(GLenum arr); + + GLuint genFrameBuffer(); + + void bindFrameBuffer(GLuint fbo); + + void ortho(int w, float radio); + + void orthox(int w, int h); + + void setColor(Channel r, Channel g, Channel b, Channel a); + + void setColor(Color c); + + Color getColor(); + + void clearMatrix(); + + void pushMatrix(); + + void translate(float x, float y); + + void scale(float sx, float sy); + + void rotate(float r); + + void popMatrix(); + + /// + /// + /// + Math::Matrix getModelViewMatrix(const Math::Transform& tansform); + + /// + /// Get model view matrix. + /// + Math::Matrix getModelViewMatrix(float x, float y, float sx, float sy, float r, float ox, float oy); + + /// + /// Get model view matrix. + /// + Math::Matrix getModelViewMatrix(); + + /// + /// Set orthogonal matrix. + /// + void setProjectionMatrix(float l, float r, float b, float t, float n, float f); + + /// + /// Get orthogonal matrix. + /// + const Math::Matrix& getProjectionMatrix(); + + /// + /// + /// + void useShader(Shaders::Shader* shader); + + /// + /// + /// + void unuseShader(); + + /// + /// + /// + Shaders::Shader* getShader(); + + /// + /// + /// + void setFont(Fonts::Font* font); + + /// + /// + /// + void unsetFont(); + + /// + /// + /// + Fonts::Font* getFont(); + + /// + /// + /// + void bindCanvas(Canvas* canvas); + + /// + /// + /// + void unbindCanvas(); + + /// + /// + /// + Canvas* getCanvas(); + + /// + /// + /// + void setBlendMode(BlendMode mode); + + /// + /// + /// + BlendMode getBlendMode(); + + /// + /// + /// + void resetStats(); + + /// + /// + /// + Stats& getStats(); + + private: + + /// + /// + /// + std::vector<Math::Matrix> mModelViewMatrices; + + /// + /// + /// + Math::Matrix mModelViewMatrix; + + /// + /// + /// + Math::Matrix mProjectionMatrix; + + /// + /// + /// + BlendMode mBlendMode; + + /// + /// + /// + Color mColor; + + /// + /// + /// + Canvas* mCanvas; + + /// + /// + /// + Shaders::Shader* mShader; + + /// + /// + /// + Fonts::Font* mFont; + + /// + /// + /// + Stats mStats; + + }; + + // Singleton. + extern OpenGL gl; + + } // namespace Graphics +} // namespace JinEngine + +#endif // __JE_OPENGL_H__
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