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#ifndef _SOFTSHADEROOM_SHADER_H_
#define _SOFTSHADEROOM_SHADER_H_
#include "../math/math.h"
#include "vert.h"
typedef struct UniformCollection {
/*built in varaibles*/
Mat4* model;
Mat4* view;
Mat4* projection;
Mat4* mvp;
Mat4* mv;
/*userside variables*/
Mat4 var_mat4[8];
Vec4 var_vec4[8];
Vec3 var_vec3[8];
Vec2 var_vec2[8];
} UniformCollection;
#define ssrum4(i) (uniforms->var_mat4[i])
#define ssruv2(i) (uniforms->var_vec2[i])
#define ssruv3(i) (uniforms->var_vec3[i])
#define ssruv4(i) (uniforms->var_vec4[i])
typedef struct VertexShaderIn {
Vert* vertex;
} VertexShaderIn;
typedef void(*VertexShader)(UniformCollection* uniforms, VertexShaderIn* in, Vec4* homocoord);
typedef struct FragmentShaderIn {
Vert *A, *B, *C;
Vec3* bc;
} FragmentShaderIn;
typedef bool(*FragmentShader)(UniformCollection* uniforms, FragmentShaderIn* in, Color* color);
typedef struct Program {
VertexShader vertexshader;
FragmentShader fragmentshader;
} Program;
void ssrS_bcpcolor(Vec3* bc, Color A, Color B, Color C, Color* out);
void ssrS_bcpvec2(Vec3* bc, Vec2* A, Vec2* B, Vec2* C, Vec2* out);
void ssrS_bcpvec3(Vec3* bc, Vec3* A, Vec3* B, Vec3* C, Vec3* out);
void ssrS_bcpvec4(Vec3* bc, Vec4* A, Vec4* B, Vec4* C, Vec4* out);
/*
** 顶点数据外，还提供额外的寄存器
*/
enum RegisterType {
REGTYPE_VEC2 = 1,
REGTYPE_VEC4 = 2,
REGTYPE_VEC3 = 3,
};
typedef struct Register {
uint length;
uint type;
union {
Vec4* v4;
Vec2* v2;
Vec3* v3;
};
} Register;
void ssrS_setregvec4_01i(uint idx, Vec4* value);
void ssrS_setregvec4_02i(uint idx, Vec4* value);
void ssrS_setregvec2_01i(uint idx, Vec2* value);
void ssrS_setregvec2_02i(uint idx, Vec2* value);
void ssrS_setregvec3_01i(uint idx, Vec3* value);
void ssrS_setregvec3_02i(uint idx, Vec3* value);
Vec4* ssrS_getregvec4_01i(uint idx);
Vec4* ssrS_getregvec4_02i(uint idx);
Vec2* ssrS_getregvec2_01i(uint idx);
Vec2* ssrS_getregvec2_02i(uint idx);
Vec3* ssrS_getregvec3_01i(uint idx);
Vec3* ssrS_getregvec3_02i(uint idx);
Vec4* ssrS_getregvec4_01(Vert* vert);
Vec4* ssrS_getregvec4_02(Vert* vert);
Vec2* ssrS_getregvec2_01(Vert* vert);
Vec2* ssrS_getregvec2_02(Vert* vert);
Vec3* ssrS_getregvec3_01(Vert* vert);
Vec3* ssrS_getregvec3_02(Vert* vert);
#endif
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