/* 
*  BSD 2-Clause “Simplified” License
*  Copyright (c) 2019, Aldrik Ramaekers, aldrik.ramaekers@protonmail.com
*  All rights reserved.
*/

#ifndef INCLUDE_RENDER
#define INCLUDE_RENDER

typedef struct t_color {
	u8 r;
	u8 g;
	u8 b;
	u8 a;
} color;

typedef struct t_vec4
{
	s32 x;
	s32 y;
	s32 w;
	s32 h;
} vec4;

typedef enum t_triangle_direction
{
	TRIANGLE_DOWN,
	TRIANGLE_UP,
	TRIANGLE_LEFT,
	TRIANGLE_RIGHT,
} triangle_direction;

s32 global_use_gpu = 0;
u8 render_depth = 1;

vec4 current_scissor;

void set_render_depth(s32 depth);

#define rgb(r_,g_,b_) (color){ r_, g_, b_, 255 }
#define rgba(r_,g_,b_,a_) (color){r_,g_,b_,a_}

void render_clear(platform_window *window);

// images
void render_image(image *image, s32 x, s32 y, s32 width, s32 height);
void render_image_tint(image *image, s32 x, s32 y, s32 width, s32 height, color tint);

// text
s32 render_text(font *font, s32 x, s32 y, char *text, color tint);
s32 render_text_ellipsed(font *font, s32 x, s32 y, s32 maxw, char *text, color tint);
s32 render_text_cutoff(font *font, s32 x, s32 y, char *text, color tint, u16 cutoff_width);
s32 render_text_vertical(font *font, s32 x, s32 y, char *text, color tint);
s32 render_text_with_cursor(font *font, s32 x, s32 y, char *text, color tint, s32 cursor_pos);
s32 render_text_with_selection(font *font, s32 x, s32 y, char *text, color tint, s32 selection_start, s32 selection_length);

s32 calculate_cursor_position(font *font, char *text, s32 click_x);
s32 calculate_text_width(font *font, char *text);
s32 calculate_text_width_upto(font *font, char *text, s32 index);
s32 calculate_text_width_from_upto(font *font, char *text, s32 from, s32 index);

// primitives
void render_rectangle(s32 x, s32 y, s32 width, s32 height, color tint);
void render_rectangle_outline(s32 x, s32 y, s32 width, s32 height, u16 outline_w, color tint);
void render_triangle(s32 x, s32 y, s32 w, s32 h, color tint, triangle_direction dir);

// utils
void render_set_scissor(platform_window *window, s32 x, s32 y, s32 w, s32 h);
vec4 render_get_scissor();
void render_reset_scissor();

void render_set_rotation(float32 rotation, float32 x, float32 y, s32 depth);

#endif