nuclear@0: #ifndef MGL_IMPL_H_
nuclear@0: #define MGL_IMPL_H_
nuclear@0: 
nuclear@14: #include "vmath.h"
nuclear@14: 
nuclear@0: #define MATRIX_STACK_SIZE	8
nuclear@0: #define MAX_LIGHTS			4
nuclear@28: #define MAX_CLIP_PLANES		6
nuclear@0: 
nuclear@9: #define ZTILE_SIZE			16384
nuclear@9: #define ZTILE_SHIFT			14
nuclear@9: #define ZTILE_MASK			0x3fff
nuclear@9: 
nuclear@9: #define ZTILE(x)			(((x) & ~ZTILE_MASK) >> ZTILE_SHIFT)
nuclear@9: #define ZTILE_OFFS(x)		((x) & ZTILE_MASK)
nuclear@9: 
nuclear@40: /*#define ROUND(x)	((x) >= 0.0 ? (x) + 0.5 : (x) - 0.5)*/
nuclear@40: #define ROUND(x) cround64(x)
nuclear@0: 
nuclear@0: 
nuclear@0: typedef float mat4_t[16];
nuclear@0: 
nuclear@0: struct vertex {
nuclear@0: 	vec4_t pos;
nuclear@0: 	vec3_t norm;
nuclear@0: 	vec2_t tc;
nuclear@0: 	float energy;
nuclear@0: 	int cidx;
nuclear@0: };
nuclear@0: 
nuclear@25: struct fixed_vertex {
nuclear@25: 	vec4x_t pos;
nuclear@25: 	vec4x_t norm;
nuclear@25: 	vec2x_t tc;
nuclear@25: 	fixed energy;
nuclear@25: 	int cidx;
nuclear@25: };
nuclear@25: 
nuclear@28: struct plane {
nuclear@28: 	vec3_t pt;
nuclear@28: 	vec3_t normal;
nuclear@28: };
nuclear@28: 
nuclear@3: struct texture {
nuclear@3: 	int width, height;
nuclear@3: 	int xshift, yshift;
nuclear@3: 	unsigned int xmask, ymask;
nuclear@3: 	unsigned char *pixels;
nuclear@3: };
nuclear@3: 
nuclear@0: struct state {
nuclear@0: 	unsigned int flags;
nuclear@0: 	int ord, frontface, cullface;
nuclear@0: 	int mmode, mtop[2];
nuclear@0: 	mat4_t matrix[2][MATRIX_STACK_SIZE];
nuclear@0: 	int prim;
nuclear@28: 	struct vertex curv, v[6];
nuclear@0: 	int vidx;
nuclear@0: 	int vp[4];	/* viewport */
nuclear@0: 	int col_range;	/* color interpolation range */
nuclear@11: 	vec4_t lpos[MAX_LIGHTS];
nuclear@0: 	float lint[MAX_LIGHTS];
nuclear@28: 	float ambient;
nuclear@28: 
nuclear@28: 	struct plane clip_planes[MAX_CLIP_PLANES + 1];
nuclear@3: 
nuclear@3: 	struct texture tex;
nuclear@0: };
nuclear@0: 
nuclear@0: struct framebuffer {
nuclear@0: 	int width, height;
nuclear@0: 	unsigned char *pixels;
nuclear@9: 	unsigned short **zbuf;	/* zbuffer broken in ZTILE_SIZE tiles */
nuclear@9: 	int num_ztiles;
nuclear@0: };
nuclear@0: 
nuclear@28: #define IS_ENABLED(f, x)	((f) & (1 << (x)))
nuclear@3: 
nuclear@25: #define vertex_to_fixedvertex(v, vx) \
nuclear@25: 	do { \
nuclear@25: 		vec4_to_fixed4((v).pos, (vx).pos); \
nuclear@25: 		vec3_to_fixed3((v).norm, (vx).norm); \
nuclear@25: 		vec2_to_fixed2((v).tc, (vx).tc); \
nuclear@25: 		(vx).energy = fixedf((v).energy); \
nuclear@25: 		(vx).cidx = (v).cidx; \
nuclear@25: 	} while(0)
nuclear@25: 
nuclear@25: #define fixedvertex_to_vertex(vx, v) \
nuclear@25: 	do { \
nuclear@25: 		fixed4_to_vec4((vx).pos, (v).pos); \
nuclear@25: 		fixed3_to_vec3((vx).norm, (v).norm); \
nuclear@25: 		fixed2_to_vec2((vx).tc, (v).tc); \
nuclear@25: 		(v).energy = fixed_float((vx).energy); \
nuclear@25: 		(v).cidx = (vx).cidx; \
nuclear@25: 	} while(0)
nuclear@25: 
nuclear@25: 
nuclear@0: int mgl_rast_init(struct state *state, struct framebuffer *fbuf);
nuclear@0: void mgl_rast_cleanup(void);
nuclear@0: void mgl_rast_prepare(void);
nuclear@0: void mgl_draw_point(struct vertex *v);
nuclear@0: void mgl_draw_line(struct vertex *v0, struct vertex *v1);
nuclear@0: void mgl_draw_poly(struct vertex *v, int numv);
nuclear@0: 
nuclear@28: int mgl_clip_init(struct state *state);
nuclear@28: int mgl_clip_poly(struct vertex *v, int vnum);
nuclear@28: 
nuclear@0: #endif	/* MGL_IMPL_H_ */