123 lines
3.1 KiB
C
123 lines
3.1 KiB
C
#ifndef CVU_GRAPHICS_H
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#define CVU_GRAPHICS_H 1
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#include <stdint.h>
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#include "cv_graphics.h"
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#ifdef CV_SMS
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/*
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Copy n bytes of data from RAM at src to CRAM at dest.
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This function is not reentrant!
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The speed of this function depends on the active video mode
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and if the screen is active.
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*/
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extern void cvu_memtocmemcpy(cv_cmemp dest, const void * src, size_t n);
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#endif
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/*
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Copy n bytes of data from RAM at src to VRAM at dest.
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This function is not reentrant!
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The speed of this function depends on the active video mode
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and if the screen is active.
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*/
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extern void cvu_memtovmemcpy(cv_vmemp dest, const void * src, size_t n);
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/*
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Copy n bytes of data from VRAM at src to RAM at dest.
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This function is not reentrant!
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The speed of this function depends on the active video mode
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and if the screen is active.
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*/
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extern void cvu_vmemtomemcpy(void *dest, cv_vmemp src, size_t n);
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/*
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Set n bytes of VRAM at dest to c.
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This function is not reentrant!
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The speed of this function depends on the active video mode
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and if the screen is active.
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*/
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extern void cvu_vmemset(cv_vmemp dest, int c, size_t n);
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/*
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Write an octet to graphics memory at dest.
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This function is not reentrant!
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*/
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extern void cvu_voutb(const uint8_t value, const cv_vmemp dest);
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/*
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Read an octet from graphics memory at src.
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This function is not reentrant!
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*/
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extern uint8_t cvu_vinb(const cv_vmemp src);
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struct cvu_sprite
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{
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uint8_t y;
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uint8_t x;
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uint8_t name;
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uint8_t tag;
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};
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#ifdef CV_SMS
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struct cvu_sprite4
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{
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uint8_t y;
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uint8_t x;
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uint8_t name;
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};
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#endif
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// Write sprite to display memory. Use the location of the sprite table as base. number should be in [0, 31].
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inline void cvu_set_sprite(const cv_vmemp base, uint_fast8_t number, const struct cvu_sprite *sprite)
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{
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cv_set_write_vram_address((base) + (number) * 0x4);
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cv_memtovmemcpy_slow((sprite), 4);
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}
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// Write sprite to display memory (in mode 4). Use the location of the sprite table as base. number should be in [0, 63].
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#ifdef CV_SMS
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inline void cvu_set_sprite4(const cv_vmemp base, uint_fast8_t number, const struct cvu_sprite4 *sprite)
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{
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cvu_voutb(sprite->y, base + number);
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cv_set_write_vram_address(base + 0x80 + number * 2);
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cv_voutb(sprite->x);
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cv_voutb(sprite->name);
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}
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#endif
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// Todo: is cvu_get_sprite needed?
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// Set the x coordinate of the sprite's upper left corner. x will be clamped to [-32, 255]
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extern void cvu_set_sprite_x(struct cvu_sprite *sprite, int x) __preserves_regs(d, e);
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extern int cvu_get_sprite_x(const struct cvu_sprite *sprite) __preserves_regs(b, c, d, e);
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// Set the y coordinate of the sprite's upper left corner. y will be clamped to [-32, 207]
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extern void cvu_set_sprite_y(struct cvu_sprite *sprite, int y) __preserves_regs(d, e);
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extern int cvu_get_sprite_y(const struct cvu_sprite *sprite) __preserves_regs(d, e);
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// Set them both at once.
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extern void cvu_set_sprite_xy(struct cvu_sprite *sprite, int x, int y);
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// Set the sprite's color.
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inline void cvu_set_sprite_color(struct cvu_sprite *sprite, enum cv_color color)
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{
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sprite->tag = (sprite->tag & 0x80) | color;
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}
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extern enum cv_color cvu_get_sprite_color(struct cvu_sprite *sprite);
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#endif
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