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#ifndef _SOFTSHADEROOM_SHADER_H_
#define _SOFTSHADEROOM_SHADER_H_
#include "../math/math.h"
#include "vert.h"
#include "texture.h"
#include "framebuffer.h"
typedef struct {
/*built in varaibles*/
Mat4* model;
Mat4* view;
Mat4* projection;
Mat4* mvp;
Mat4* mv;
/*extra variables*/
Texture* var_tex[12];
Mat4 var_mat4[8];
Vec4 var_vec4[8];
Vec3 var_vec3[8];
Vec2 var_vec2[8];
float var_num[8];
/*userdata*/
void* userdata;
} UniformCollection;
#define UTEX(i) (uniforms->var_tex[i])
#define UM4(i) (&uniforms->var_mat4[i])
#define UV2(i) (&uniforms->var_vec2[i])
#define UV3(i) (&uniforms->var_vec3[i])
#define UV4(i) (&uniforms->var_vec4[i])
#define UN(i) (&uniforms->var_num[i])
#define UU (uniforms->userdata)
#define REG_TOTAL 32
#define REG_NUM_COUNT 4
#define REG_V2_COUNT 8
#define REG_V3_COUNT 12
#define REG_V4_COUNT 8
//typedef struct {
// Vertex* vertex;
//} Vertex;
typedef void(*VertexShader)(UniformCollection* uniforms, Vertex* in, Vec4* homocoord);
typedef struct {
float num[REG_NUM_COUNT];
Vec2 v2[REG_V2_COUNT];
Vec3 v3[REG_V3_COUNT];
Vec4 v4[REG_V4_COUNT];
} FragmentShaderIn;
typedef bool(*FragmentShader)(UniformCollection* uniforms, Color32* color);
typedef struct {
VertexShader vertexshader;
FragmentShader fragmentshader;
uint varying_flag;
} Program;
#define VARYING_NONE (0)
#define VARYING_NUM_00 (1u)
#define VARYING_NUM_01 (1u << 1)
#define VARYING_NUM_02 (1u << 2)
#define VARYING_NUM_03 (1u << 3)
#define VARYING_NUM (VARYING_NUM_00 | VARYING_NUM_01 | VARYING_NUM_02 | VARYING_NUM_03 )
#define VARYING_V2_00 (1u << 4)
#define VARYING_V2_01 (1u << 5)
#define VARYING_V2_02 (1u << 6)
#define VARYING_V2_03 (1u << 7)
#define VARYING_V2_04 (1u << 8)
#define VARYING_V2_05 (1u << 9)
#define VARYING_V2_06 (1u << 10)
#define VARYING_V2_07 (1u << 11)
#define VARYING_V2 (VARYING_V2_00 | VARYING_V2_01 | VARYING_V2_02 | VARYING_V2_03 | VARYING_V2_04 | VARYING_V2_05 | VARYING_V2_06 | VARYING_V2_07)
#define VARYING_V3_00 (1u << 12)
#define VARYING_V3_01 (1u << 13)
#define VARYING_V3_02 (1u << 14)
#define VARYING_V3_03 (1u << 15)
#define VARYING_V3_04 (1u << 16)
#define VARYING_V3_05 (1u << 17)
#define VARYING_V3_06 (1u << 18)
#define VARYING_V3_07 (1u << 19)
#define VARYING_V3_08 (1u << 20)
#define VARYING_V3_09 (1u << 21)
#define VARYING_V3_10 (1u << 22)
#define VARYING_V3_11 (1u << 23)
#define VARYING_V3 (VARYING_V3_00 | VARYING_V3_01 | VARYING_V3_02 | VARYING_V3_03 | VARYING_V3_04 | VARYING_V3_05| VARYING_V3_06| VARYING_V3_07 | VARYING_V3_08 |VARYING_V3_09 | VARYING_V3_10 | VARYING_V3_11)
#define VARYING_V4_00 (1u << 24)
#define VARYING_V4_01 (1u << 25)
#define VARYING_V4_02 (1u << 26)
#define VARYING_V4_03 (1u << 27)
#define VARYING_V4_04 (1u << 28)
#define VARYING_V4_05 (1u << 29)
#define VARYING_V4_06 (1u << 30)
#define VARYING_V4_07 (1u << 31)
#define VARYING_V4 (VARYING_V4_00 | VARYING_V4_01 | VARYING_V4_02 | VARYING_V4_03 | VARYING_V4_04 | VARYING_V4_05 | VARYING_V4_06 | VARYING_V4_07)
#define VARYING_ANY (VARYING_NUM | VARYING_V2 | VARYING_V3 | VARYING_V4)
Color* ssrS_bcpcolor(Vec3* bc, Color A, Color B, Color C, Color* out);
float* ssrS_bcpnum(Vec3* bc, float* A, float* B, float* C, float* out);
Vec2* ssrS_bcpvec2(Vec3* bc, Vec2* A, Vec2* B, Vec2* C, Vec2* out);
Vec3* ssrS_bcpvec3(Vec3* bc, Vec3* A, Vec3* B, Vec3* C, Vec3* out);
Vec4* ssrS_bcpvec4(Vec3* bc, Vec4* A, Vec4* B, Vec4* C, Vec4* out);
Color* ssrS_lerpcolor(float t, Color A, Color B, Color* out);
float* ssrS_lerpnum(float t, float* A, float* B, float* out);
Vec2* ssrS_lerpvec2(float t, Vec2* A, Vec2* B, Vec2* out);
Vec3* ssrS_lerpvec3(float t, Vec3* A, Vec3* B, Vec3* out);
Vec4* ssrS_lerpvec4(float t, Vec4* A, Vec4* B, Vec4* out);
typedef enum {
REGTYPE_NUM = 1,
REGTYPE_VEC2,
REGTYPE_VEC4,
REGTYPE_VEC3,
} RegisterType;
typedef struct {
uint length;
uint type;
uint element_size; /*element in bytes, 4\8\12\16*/
union {
byte* data;
/*pecific*/
float* num;
Vec2* v2;
Vec3* v3;
Vec4* v4;
};
} Register;
typedef void* (*BcpInterpolator)(Vec3* bc, void* a, void* b, void* c, void* out);
typedef void* (*LinearInterpolator)(float t, void* a, void* b, void* out);
typedef struct {
uint element_size;
byte* data; /*mutable, either of registers or temp-registers*/
byte** accessor;
BcpInterpolator bcp_interpolator;
LinearInterpolator linear_interpolator;
byte* output; /*fragment-in*/
} ActiveReg;
/*interpolation registers*/
Register registers[REG_TOTAL];
ActiveReg active_regs[REG_TOTAL];
int open_regsi[REG_TOTAL]; /*active registers during a draw call*/
float *reg_num_00, *reg_num_01, *reg_num_02, *reg_num_03;
Vec2 *reg_v2_00, *reg_v2_01, *reg_v2_02, *reg_v2_03, *reg_v2_04, *reg_v2_05, *reg_v2_06, *reg_v2_07;
Vec3 *reg_v3_00, *reg_v3_01, *reg_v3_02, *reg_v3_03, *reg_v3_04, *reg_v3_05, *reg_v3_06, *reg_v3_07, *reg_v3_08, *reg_v3_09, *reg_v3_10, *reg_v3_11;
Vec4 *reg_v4_00, *reg_v4_01, *reg_v4_02, *reg_v4_03, *reg_v4_04, *reg_v4_05, *reg_v4_06, *reg_v4_07;
void ssrS_openregs(uint varying_flag);
void ssrS_setactiveregr();
void ssrS_setactiveregc();
void ssrS_solveregsbcp(Vec3* bc, uint a, uint b, uint c);
void ssrS_solveregslerp(float t, uint ia, uint ib);
void ssrS_solveregscopy(uint i);
void ssrS_setregisters(int capacity);
void ssrS_setupregisterpointers(int idx);
/*set register accessor, point to fragin struct*/
void ssrS_setregtofragin();
#define tex2d(tex, uv) \
texture_sampling(tex, (uv)->x, (uv)->y)
/*frame color buffer output*/
Color32* out_color[RENDER_TARGET_COUNT];
#endif
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