source/core/pipelinestate.h

   1 #ifndef MSP_GL_PIPELINESTATE_H_
   2 #define MSP_GL_PIPELINESTATE_H_
   3
   4 #include <vector>
   5 #include <msp/core/noncopyable.h>
   6 #include "cullface.h"
   7
   8 namespace Msp {
   9 namespace GL {
  10
  11 class Blend;
  12 class BufferBackedUniformBlock;
  13 class DefaultUniformBlock;
  14 class DepthTest;
  15 class Framebuffer;
  16 class Program;
  17 class Rect;
  18 class Sampler;
  19 class StencilTest;
  20 class Texture;
  21 class UniformBlock;
  22 class VertexSetup;
  23
  24 class PipelineState: public NonCopyable
  25 {
  26 private:
  27         struct BoundTexture
  28         {
  29                 unsigned binding;
  30                 mutable bool changed;
  31                 const Texture *texture;
  32                 const Sampler *sampler;
  33
  34                 BoundTexture(unsigned);
  35         };
  36
  37         struct BoundUniformBlock
  38         {
  39                 int binding;
  40                 mutable bool changed;
  41                 const UniformBlock *block;
  42
  43                 BoundUniformBlock(int);
  44         };
  45
  46         enum ChangeMask
  47         {
  48                 SHPROG = 1,
  49                 VERTEX_SETUP = 2,
  50                 FACE_CULL = 4,
  51                 CLIP_PLANES = 8,
  52                 TEXTURES = 16,
  53                 UNIFORMS = 32,
  54                 DEPTH_TEST = 64,
  55                 STENCIL_TEST = 128,
  56                 BLEND = 256,
  57                 FRAMEBUFFER = 512,
  58                 VIEWPORT = 1024,
  59                 SCISSOR = 2048
  60         };
  61
  62         const Framebuffer *framebuffer;
  63         const Rect *viewport;
  64         const Rect *scissor;
  65         const Program *shprog;
  66         const VertexSetup *vertex_setup;
  67         FaceWinding front_face;
  68         CullMode face_cull;
  69         unsigned enabled_clip_planes;
  70         std::vector<BoundTexture> textures;
  71         std::vector<BoundUniformBlock> uniform_blocks;
  72         const DepthTest *depth_test;
  73         const StencilTest *stencil_test;
  74         const Blend *blend;
  75         mutable unsigned changes;
  76
  77         static const PipelineState *last_applied;
  78         static std::vector<int> bound_tex_targets;
  79         static std::vector<char> bound_uniform_blocks;
  80         static unsigned restart_index;
  81
  82 public:
  83         PipelineState();
  84         ~PipelineState();
  85
  86 private:
  87         template<typename T>
  88         void set(T &, T, unsigned);
  89 public:
  90         void set_framebuffer(const Framebuffer *);
  91         void set_viewport(const Rect *);
  92         void set_scissor(const Rect *);
  93         void set_shader_program(const Program *);
  94         void set_vertex_setup(const VertexSetup *);
  95         void set_front_face(FaceWinding);
  96         void set_face_cull(CullMode);
  97         void set_enabled_clip_planes(unsigned);
  98         void set_texture(unsigned, const Texture *, const Sampler *);
  99         void set_uniforms(const DefaultUniformBlock *);
 100         void set_uniform_block(unsigned, const BufferBackedUniformBlock *);
 101 private:
 102         void set_uniform_block_(int, const UniformBlock *);
 103 public:
 104         void set_depth_test(const DepthTest *);
 105         void set_stencil_test(const StencilTest *);
 106         void set_blend(const Blend *);
 107
 108         const Framebuffer *get_framebuffer() const { return framebuffer; }
 109         const Program *get_shader_program() const { return shprog; }
 110         const VertexSetup *get_vertex_setup() const { return vertex_setup; }
 111         FaceWinding get_front_face() const { return front_face; }
 112         CullMode get_face_cull() const { return face_cull; }
 113
 114         void apply() const;
 115 private:
 116         void apply(unsigned) const;
 117 public:
 118         static void clear();
 119 };
 120
 121 } // namespace GL
 122 } // namespace Msp
 123
 124 #endif