//---
//	display:fx - Internal definitions for the display module on fx9860g
//---

#ifndef DISPLAY_FX
#define DISPLAY_FX

#include <gint/defs/types.h>
#include <gint/display.h>

/* masks() - compute the vram masks for a given rectangle

   Since the VRAM is line-based with four uin32_t elements per row, we can
   execute any operation on a rectangle by running it on each set of four
   uint32_t elements.

   This function calculates four uint32_t values and stores them in @mask. Each
   of the 128 bits in this array represents a column of the screen, and the bit
   of column c is 1 iff x1 <= c <= x2.

   These masks can then be and-ed/or-ed/anything on the VRAM to draw.

   @x1 @x2  Targeted screen range, horizontally (both included)
   @masks   Stores the result of the function (four uint32_t values) */
void masks(int x1, int x2, uint32_t *masks);

/* bopti_render_clip() - render a bopti image with clipping
   @x @y             Location of the top-left corner
   @img              Image encoded by [fxconv]
   @left @top @w @h  Bounding box to render */
void bopti_render_clip(int x, int y, image_t const *img, int left, int top,
	int w, int h);

/* bopti_render_noclip() - render a bopti image without clipping
   This function is only ever slightly faster than bopti_render_clip(),
   eliminating two types of coordinate checks:
   1. The bounding box does not overflow from the image
   2. The final rendering does not overflow from the screen

   @x @y             Location of the top-left corner
   @img              Image encoded by [fxconv]
   @left @top @w @h  Bounding box to render */
void bopti_render_noclip(int x, int y, image_t const *img, int left, int top,
	int w, int h);

#endif /* DISPLAY_FX */