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/*
* Copyright © 2016 Keith Packard <keithp@keithp.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*/
#ifndef _AO_DRAW_H_
#define _AO_DRAW_H_
void
ao_blt(uint32_t *src_line,
int16_t src_stride,
int16_t src_x,
uint32_t *dst_line,
int16_t dst_stride,
int16_t dst_x,
int16_t width,
int16_t height,
uint8_t rop,
uint8_t reverse,
uint8_t upsidedown);
void
ao_solid(uint32_t and,
uint32_t xor,
uint32_t *dst,
int16_t dst_stride,
int16_t dst_x,
int16_t width,
int16_t height);
void
ao_text(char *string,
uint32_t *dst_line,
int16_t dst_stride,
int16_t dst_x);
#define AO_ROP_CLEAR 0x0
#define AO_ROP_COPY 0x3
#define AO_ROP_SET 0xf
#define AO_SHIFT 5
#define AO_UNIT (1 << AO_SHIFT)
#define AO_MASK (AO_UNIT - 1)
#define AO_ALLONES ((uint32_t) -1)
static inline uint32_t
ao_left(uint32_t bits, int16_t shift) {
return bits >> shift;
}
static inline uint32_t
ao_right(uint32_t bits, int16_t shift) {
return bits << shift;
}
static inline uint32_t
ao_right_mask(int16_t x) {
if ((AO_UNIT - x) & AO_MASK)
return ao_left(AO_ALLONES,(AO_UNIT - x) & AO_MASK);
else
return 0;
}
static inline uint32_t
ao_left_mask(int16_t x) {
if (x & AO_MASK)
return ao_right(AO_ALLONES, x & AO_MASK);
else
return 0;
}
static inline uint32_t
ao_bits_mask(int16_t x, int16_t w) {
return ao_right(AO_ALLONES, x & AO_MASK) &
ao_left(AO_ALLONES,(AO_UNIT - (x + w)) & AO_MASK);
}
#define ao_mask_bits(x,w,l,n,r) { \
n = (w); \
r = ao_right_mask((x)+n); \
l = ao_left_mask(x); \
if (l) { \
n -= AO_UNIT - ((x) & AO_MASK); \
if (n < 0) { \
n = 0; \
l &= r; \
r = 0; \
} \
} \
n >>= AO_SHIFT; \
}
static inline uint32_t
ao_do_mask_rrop(uint32_t dst, uint32_t and, uint32_t xor, uint32_t mask) {
return (dst & (and | ~mask)) ^ (xor & mask);
}
static inline uint32_t
ao_do_rrop(uint32_t dst, uint32_t and, uint32_t xor) {
return (dst & and) ^ xor;
}
#define AO_CLEAR 0x0 /* 0 */
#define AO_AND 0x1 /* src AND dst */
#define AO_AND_REVERSE 0x2 /* src AND NOT dst */
#define AO_COPY 0x3 /* src */
#define AO_AND_INVERTED 0x4 /* NOT src AND dst */
#define AO_NOOP 0x5 /* dst */
#define AO_XOR 0x6 /* src XOR dst */
#define AO_OR 0x7 /* src OR dst */
#define AO_NOR 0x8 /* NOT src AND NOT dst */
#define AO_EQUIV 0x9 /* NOT src XOR dst */
#define AO_INVERT 0xa /* NOT dst */
#define AO_OR_REVERSE 0xb /* src OR NOT dst */
#define AO_COPY_INVERTED 0xc /* NOT src */
#define AO_OR_INVERTED 0xd /* NOT src OR dst */
#define AO_NAND 0xe /* NOT src OR NOT dst */
#define AO_SET 0xf /* 1 */
#endif /* _AO_DRAW_H_ */
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