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annotate src/shader.h @ 10:305c8f6abef1

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the plane doesn't need a PRS really
author John Tsiombikas <nuclear@member.fsf.org>
date Sun, 15 Feb 2015 05:25:04 +0200
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nuclear@8 1 #ifndef SHADER_H_
nuclear@8 2 #define SHADER_H_
nuclear@8 3
nuclear@8 4 #include <vector>
nuclear@8 5 #include <string>
nuclear@8 6 #include "vmath/vmath.h"
nuclear@8 7 #include "opengl.h"
nuclear@8 8
nuclear@8 9 class ShaderProg;
nuclear@8 10
nuclear@8 11 void bind_shader(const ShaderProg *sdr);
nuclear@8 12 const ShaderProg *get_current_shader();
nuclear@8 13
nuclear@8 14
nuclear@8 15 class Shader {
nuclear@8 16 private:
nuclear@8 17 unsigned int sdr;
nuclear@8 18 unsigned int type;
nuclear@8 19 std::string name, src;
nuclear@8 20
nuclear@8 21 public:
nuclear@8 22 Shader();
nuclear@8 23 ~Shader();
nuclear@8 24
nuclear@8 25 unsigned int get_id() const;
nuclear@8 26
nuclear@8 27 void set_name(const char *name);
nuclear@8 28 const char *get_name() const;
nuclear@8 29
nuclear@8 30 bool create(const char *src, unsigned int type);
nuclear@8 31 void destroy();
nuclear@8 32
nuclear@8 33 bool load(const char *fname, unsigned int type);
nuclear@8 34
nuclear@8 35
nuclear@8 36 // these functions are only meant to be used by the ShaderSet
nuclear@8 37 static Shader *create_shader();
nuclear@8 38 static bool load_shader(Shader *sdr, const char *fname);
nuclear@8 39 static bool done_shader(Shader *sdr, unsigned int type);
nuclear@8 40 static void destroy_shader(Shader *sdr);
nuclear@8 41 };
nuclear@8 42
nuclear@8 43 #define VSDR(s) s, GL_VERTEX_SHADER
nuclear@8 44 #define FSDR(s) s, GL_FRAGMENT_SHADER
nuclear@8 45 #define PSDR(s) FSDR(s)
nuclear@8 46 #define GSDR(s) s, GL_GEOMETRY_SHADER
nuclear@8 47 #define TCSDR(s) s, GL_TESS_CONTROL_SHADER
nuclear@8 48 #define TESDR(s) s, GL_TESS_EVALUATION_SHADER
nuclear@8 49
nuclear@8 50 class ShaderProg {
nuclear@8 51 private:
nuclear@8 52 unsigned int prog;
nuclear@8 53 mutable bool must_link;
nuclear@8 54 std::vector<Shader*> shaders;
nuclear@8 55
nuclear@8 56 struct StateLocCache { int sidx, loc; };
nuclear@8 57 /** a cache of all st_ prefixed uniform locations and their corresponding
nuclear@8 58 * index in the global uniform state vector (see unistate.h)
nuclear@8 59 */
nuclear@8 60 mutable std::vector<StateLocCache> stloc_cache;
nuclear@8 61
nuclear@8 62 void cache_state_uniforms() const;
nuclear@8 63 void setup_state_uniforms() const;
nuclear@8 64
nuclear@8 65 public:
nuclear@8 66 static ShaderProg *current;
nuclear@8 67
nuclear@8 68 ShaderProg();
nuclear@8 69 ~ShaderProg();
nuclear@8 70
nuclear@8 71 /// returns the OpenGL object id for this shader program
nuclear@8 72 unsigned int get_id() const;
nuclear@8 73
nuclear@8 74 /** takes a series of shaders, and constructs a program object by linking
nuclear@8 75 * them together. Terminate with a null pointer (don't use 0!) */
nuclear@8 76 bool create(Shader *sdr, ...);
nuclear@8 77 /// same as above, but with a va_list instead of variable arguments.
nuclear@8 78 bool create(Shader *sdr, va_list ap);
nuclear@8 79 /** takes two shaders (vertex and pixel) and constructs a program object by
nuclear@8 80 * linking them together. Either one can be null. */
nuclear@8 81 bool create(Shader *vsdr, Shader *psdr);
nuclear@8 82
nuclear@8 83 /** takes a series of shader source/shader type pairs and constructs a program
nuclear@8 84 * object by linking them together. Terminate with a null pointer (don't use 0!)
nuclear@8 85 * You can use the VSDR, PSDR, GSDR, TCSDR, TESDR convenience macros for passing
nuclear@8 86 * the pairs.
nuclear@8 87 * Example: create(VSDR(vsrc0), VSDR(vsrc1), PSDR(psrc), NULL);
nuclear@8 88 */
nuclear@8 89 bool create(const char *src, unsigned int type, ...);
nuclear@8 90 /// same as above, but with a va_list instead of variable arguments.
nuclear@8 91 bool create(const char *src, unsigned int type, va_list ap);
nuclear@8 92 /** takes two shaders source strings (vertex and pixel) and constructs
nuclear@8 93 * a program object by linking them together. Either one can be null. */
nuclear@8 94 bool create(const char *vsrc, const char *psrc);
nuclear@8 95
nuclear@8 96 void destroy();
nuclear@8 97
nuclear@8 98 /** takes a series of shader filename/shader type pairs, loads the shaders and
nuclear@8 99 * constructs a program object by linking them together. Terminate with a null
nuclear@8 100 * pointer (don't use 0!). You can use the VSDR, PSDR, GSDR, TCSDR, TESDR convenience
nuclear@8 101 * macros for passing the pairs.
nuclear@8 102 * Example: load(VSDR("vsdr1.glsl"), VSDR("vsdr2.glsl"), PSDR("pixel.glsl"), NULL);
nuclear@8 103 */
nuclear@8 104 bool load(const char *fname, unsigned int type, ...);
nuclear@8 105 /// same as above, but with a va_list instead of variable arguments.
nuclear@8 106 bool load(const char *fname, unsigned int type, va_list ap);
nuclear@8 107 /** takes the filenames of two shader files (vertex and pixel), loads them and
nuclear@8 108 * constructs a program object by linking them together. Either one can be null */
nuclear@8 109 bool load(const char *vsrc, const char *psrc);
nuclear@8 110
nuclear@8 111 void add_shader(Shader *sdr);
nuclear@8 112 bool link() const;
nuclear@8 113
nuclear@8 114 void bind() const;
nuclear@8 115
nuclear@8 116 int get_attrib_location(const char *name) const;
nuclear@8 117 void set_attrib_location(const char *name, int loc) const;
nuclear@8 118
nuclear@8 119 int get_uniform_location(const char *name) const;
nuclear@8 120
nuclear@8 121 bool set_uniform(int loc, int val) const;
nuclear@8 122 bool set_uniform(int loc, float val) const;
nuclear@8 123 bool set_uniform(int loc, const Vector2 &v) const;
nuclear@8 124 bool set_uniform(int loc, const Vector3 &v) const;
nuclear@8 125 bool set_uniform(int loc, const Vector4 &v) const;
nuclear@8 126 bool set_uniform(int loc, const Matrix3x3 &m) const;
nuclear@8 127 bool set_uniform(int loc, const Matrix4x4 &m) const;
nuclear@8 128
nuclear@8 129 bool set_uniform(const char *name, int val) const;
nuclear@8 130 bool set_uniform(const char *name, float val) const;
nuclear@8 131 bool set_uniform(const char *name, const Vector2 &v) const;
nuclear@8 132 bool set_uniform(const char *name, const Vector3 &v) const;
nuclear@8 133 bool set_uniform(const char *name, const Vector4 &v) const;
nuclear@8 134 bool set_uniform(const char *name, const Matrix3x3 &m) const;
nuclear@8 135 bool set_uniform(const char *name, const Matrix4x4 &m) const;
nuclear@8 136
nuclear@8 137 friend void setup_unistate(const ShaderProg*);
nuclear@8 138 };
nuclear@8 139
nuclear@8 140 #endif // SHADER_H_