pxl8/src/pxl8_gfx.h

#pragma once

#include "pxl8_math.h"
#include "pxl8_types.h"

typedef struct pxl8_gfx pxl8_gfx;

typedef enum pxl8_blend_mode {
    PXL8_BLEND_ADD,
    PXL8_BLEND_ALPHA,
    PXL8_BLEND_MULTIPLY,
    PXL8_BLEND_NONE
} pxl8_blend_mode;

typedef struct pxl8_mode7_params {
    bool active;
    f32 horizon;
    f32 offset_x, offset_y;
    f32 rotation;
    f32 scale_x, scale_y;
} pxl8_mode7_params;

typedef struct pxl8_palette_cycle {
    bool active;
    u8 end_index;
    f32 speed;
    u8 start_index;
    f32 timer;
} pxl8_palette_cycle;

typedef struct pxl8_scanline_effect {
    bool active;
    void (*process)(pxl8_gfx* gfx, i32 line, f32 time);
} pxl8_scanline_effect;

typedef struct pxl8_vertex {
    u32 color;
    pxl8_vec3 normal;
    pxl8_vec3 position;
    f32 u, v;
} pxl8_vertex;

typedef struct pxl8_effects {
    pxl8_palette_cycle palette_cycles[8];
    pxl8_scanline_effect scanline_effects[4];
    f32 time;
} pxl8_effects;

typedef struct pxl8_triangle {
    pxl8_vertex v[3];
} pxl8_triangle;

#ifdef __cplusplus
extern "C" {
#endif

pxl8_gfx* pxl8_gfx_create(pxl8_color_mode mode, pxl8_resolution resolution, const char* title, i32 window_width, i32 window_height);
void pxl8_gfx_destroy(pxl8_gfx* gfx);

pxl8_bounds pxl8_gfx_get_bounds(pxl8_gfx* gfx);
pxl8_color_mode pxl8_gfx_get_color_mode(pxl8_gfx* gfx);
u8* pxl8_gfx_get_framebuffer(pxl8_gfx* gfx);
i32 pxl8_gfx_get_height(const pxl8_gfx* gfx);
void pxl8_gfx_get_resolution_dimensions(pxl8_resolution resolution, i32* width, i32* height);
i32 pxl8_gfx_get_width(const pxl8_gfx* gfx);
pxl8_result pxl8_gfx_init_atlas(pxl8_gfx* gfx, u32 width, u32 height);
pxl8_result pxl8_gfx_load_font_atlas(pxl8_gfx* gfx);
pxl8_result pxl8_gfx_load_palette(pxl8_gfx* gfx, const char* path);
pxl8_result pxl8_gfx_load_sprite(pxl8_gfx* gfx, const char* path);
void pxl8_gfx_present(pxl8_gfx* gfx);
void pxl8_gfx_project(pxl8_gfx* gfx, f32 left, f32 right, f32 top, f32 bottom);
void pxl8_gfx_upload_atlas(pxl8_gfx* gfx);
void pxl8_gfx_upload_framebuffer(pxl8_gfx* gfx);
pxl8_viewport pxl8_gfx_viewport(pxl8_bounds bounds, i32 width, i32 height);
void pxl8_gfx_set_viewport(pxl8_gfx* gfx, pxl8_viewport vp);

void pxl8_gfx_color_ramp(pxl8_gfx* gfx, u8 start, u8 count, u32 from_color, u32 to_color);
void pxl8_gfx_cycle_palette(pxl8_gfx* gfx, u8 start, u8 count, i32 step);
void pxl8_gfx_fade_palette(pxl8_gfx* gfx, u8 start, u8 count, f32 amount, u32 target_color);
void pxl8_gfx_interpolate_palettes(pxl8_gfx* gfx, u32* palette1, u32* palette2, u8 start, u8 count, f32 t);
void pxl8_gfx_process_effects(pxl8_gfx* gfx, pxl8_effects* effects, f32 dt);
void pxl8_gfx_swap_palette(pxl8_gfx* gfx, u8 start, u8 count, u32* new_colors);

void pxl8_circle(pxl8_gfx* gfx, i32 cx, i32 cy, i32 radius, u32 color);
void pxl8_circle_fill(pxl8_gfx* gfx, i32 cx, i32 cy, i32 radius, u32 color);
void pxl8_clr(pxl8_gfx* gfx, u32 color);
u32 pxl8_get_pixel(pxl8_gfx* gfx, i32 x, i32 y);
void pxl8_line(pxl8_gfx* gfx, i32 x0, i32 y0, i32 x1, i32 y1, u32 color);
void pxl8_pixel(pxl8_gfx* gfx, i32 x, i32 y, u32 color);
void pxl8_rect(pxl8_gfx* gfx, i32 x, i32 y, i32 w, i32 h, u32 color);
void pxl8_rect_fill(pxl8_gfx* gfx, i32 x, i32 y, i32 w, i32 h, u32 color);
void pxl8_sprite(pxl8_gfx* gfx, u32 sprite_id, i32 x, i32 y, i32 w, i32 h);
void pxl8_text(pxl8_gfx* gfx, const char* text, i32 x, i32 y, u32 color);

void pxl8_3d_clear_zbuffer(pxl8_gfx* gfx);
void pxl8_3d_draw_line_3d(pxl8_gfx* gfx, pxl8_vec3 p0, pxl8_vec3 p1, u32 color);
void pxl8_3d_draw_triangle(pxl8_gfx* gfx, pxl8_triangle tri);
void pxl8_3d_draw_triangle_raw(pxl8_gfx* gfx, pxl8_vec3 v0, pxl8_vec3 v1, pxl8_vec3 v2, u32 color);
void pxl8_3d_set_backface_culling(pxl8_gfx* gfx, bool culling);
void pxl8_3d_set_model(pxl8_gfx* gfx, pxl8_mat4 mat);
void pxl8_3d_set_projection(pxl8_gfx* gfx, pxl8_mat4 mat);
void pxl8_3d_set_view(pxl8_gfx* gfx, pxl8_mat4 mat);
void pxl8_3d_set_wireframe(pxl8_gfx* gfx, bool wireframe);

#ifdef __cplusplus
}
#endif