2 * @file objectrenderer.h
3 * @brief Definition of ObjectRenderer class
7 #include "graphicsbuffer.h"
8 #include "shaderprogram.h"
9 #include "bufferbuilder.h"
14 * Abstract Base class representing how a particular type of object will be rendered
15 * Includes GPU rendering and CPU rendering
16 * For GPU rendering, pass GLSL shader source files to constructor in the constructor of a base class
17 * To leave unimplemented, just pass NULL filename strings
18 * For CPU rendering, implement RenderUsingCPU in the base class
19 * To leave unimplemented, just call ObjectRenderer::RenderUsingCPU in the base class
20 * The View class uses ObjectRenderer's; see view.h
25 /** Construct the ObjectRenderer **/
26 ObjectRenderer(const ObjectType & type, const char * vert_glsl_file, const char * frag_glsl_file, const char * geom_glsl_file = "");
27 virtual ~ObjectRenderer() {}
30 * Use the GPU to render the objects - GLSL shader approach
31 * This way is definitely faster, but subject to the GPU's limitations on precision
33 void RenderUsingGPU();
36 * Use the CPU to render the objects - "make a bitmap and convert it to a texture" approach
37 * This way is definitely slower, but gives us more control over the number representations than a GPU
39 virtual void RenderUsingCPU() = 0;
43 const ObjectType m_type; /** Type of objects **/
45 friend class View; //View is a friendly fellow in the world of IPDF
46 void PrepareBuffers(unsigned max_size);
47 void FinaliseBuffers();
48 void AddObjectToBuffers(unsigned index);
51 ShaderProgram m_shader_program; /** GLSL shaders for GPU **/
52 GraphicsBuffer m_ibo; /** Index Buffer Object for GPU rendering **/
53 std::vector<unsigned> m_indexes; /** Index vector for CPU rendering **/
54 BufferBuilder<uint32_t> * m_buffer_builder; /** A BufferBuilder is temporarily used when preparing the ibo and std::vector **/
57 /** Renderer for filled rectangles **/
58 class RectFilledRenderer : public ObjectRenderer
61 RectFilledRenderer() : ObjectRenderer(RECT_FILLED, "shaders/rect_vert.glsl", "shaders/rect_frag.glsl","shaders/rect_filled_geom.glsl") {}
62 virtual ~RectFilledRenderer() {}
63 virtual void RenderUsingCPU() {ObjectRenderer::RenderUsingCPU();} //TODO: Implement
65 /** Renderer for outlined rectangles **/
66 class RectOutlineRenderer : public ObjectRenderer
69 RectOutlineRenderer() : ObjectRenderer(RECT_OUTLINE, "shaders/rect_vert.glsl", "shaders/rect_frag.glsl", "shaders/rect_outline_geom.glsl") {}
70 virtual ~RectOutlineRenderer() {}
71 virtual void RenderUsingCPU() {ObjectRenderer::RenderUsingCPU();} //TODO: Implement
73 /** Renderer for filled circles **/
74 class CircleFilledRenderer : public ObjectRenderer
77 CircleFilledRenderer() : ObjectRenderer(CIRCLE_FILLED, "shaders/rect_vert.glsl", "shaders/circle_frag.glsl", "shaders/circle_filled_geom.glsl") {}
78 virtual ~CircleFilledRenderer() {}
79 virtual void RenderUsingCPU() {ObjectRenderer::RenderUsingCPU();} //TODO: Implement