diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/draw/5x7.bdf | 3190 | ||||
| -rw-r--r-- | src/draw/Makefile | 4 | ||||
| -rw-r--r-- | src/draw/ao_blt.c | 294 | ||||
| -rw-r--r-- | src/draw/ao_copy.c | 75 | ||||
| -rw-r--r-- | src/draw/ao_draw.h | 119 | ||||
| -rw-r--r-- | src/draw/ao_draw_int.h | 136 | ||||
| -rw-r--r-- | src/draw/ao_font.h | 139 | ||||
| -rw-r--r-- | src/draw/ao_line.c | 314 | ||||
| -rw-r--r-- | src/draw/ao_pattern.c | 80 | ||||
| -rw-r--r-- | src/draw/ao_rect.c | 46 | ||||
| -rw-r--r-- | src/draw/ao_text.c | 65 | ||||
| -rwxr-xr-x | src/draw/font-convert | 150 | ||||
| -rw-r--r-- | src/draw/line.5c | 389 |
13 files changed, 5001 insertions, 0 deletions
diff --git a/src/draw/5x7.bdf b/src/draw/5x7.bdf new file mode 100644 index 00000000..b511f289 --- /dev/null +++ b/src/draw/5x7.bdf @@ -0,0 +1,3190 @@ +STARTFONT 2.1 +COMMENT Copyright 1991 Massachusetts Institute of Technology +COMMENT +COMMENT Permission to use, copy, modify, and distribute this software +COMMENT and its documentation for any purpose and without fee is +COMMENT hereby granted, provided that the above copyright notice +COMMENT appear in all copies and that both that copyright notice and +COMMENT this permission notice appear in supporting documentation, +COMMENT and that the name of M.I.T. not be used in advertising or +COMMENT publicity pertaining to distribution of the software without +COMMENT specific, written prior permission. M.I.T. makes no +COMMENT representations about the suitability of this software for +COMMENT any purpose. It is provided "as is" without express or +COMMENT implied warranty. +COMMENT +COMMENT M.I.T. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, +COMMENT INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND +COMMENT FITNESS, IN NO EVENT SHALL M.I.T. BE LIABLE FOR ANY SPECIAL, +COMMENT INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER +COMMENT RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN +COMMENT ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, +COMMENT ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE +COMMENT OF THIS SOFTWARE. +COMMENT +COMMENT Author: Stephen Gildea, MIT X Consortium, June 1991 +COMMENT +FONT -Misc-Fixed-Medium-R-Normal--7-70-75-75-C-50-ISO8859-1 +SIZE 7 75 75 +FONTBOUNDINGBOX 5 7 0 -1 +STARTPROPERTIES 21 +FONTNAME_REGISTRY "" +FOUNDRY "Misc" +FAMILY_NAME "Fixed" +WEIGHT_NAME "Medium" +SLANT "R" +SETWIDTH_NAME "Normal" +ADD_STYLE_NAME "" +PIXEL_SIZE 7 +POINT_SIZE 70 +RESOLUTION_X 75 +RESOLUTION_Y 75 +SPACING "C" +AVERAGE_WIDTH 50 +CHARSET_REGISTRY "ISO8859" +CHARSET_ENCODING "1" +FONT_ASCENT 6 +FONT_DESCENT 1 +UNDERLINE_POSITION 0 +DESTINATION 1 +DEFAULT_CHAR 0 +COPYRIGHT "Copyright 1991 Massachusetts Institute of Technology" +ENDPROPERTIES +CHARS 224 +STARTCHAR C000 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+BITMAP +50 +00 +90 +90 +90 +70 +00 +ENDCHAR +STARTCHAR C253 +ENCODING 253 +SWIDTH 686 0 +DWIDTH 5 0 +BBX 5 7 0 -1 +BITMAP +20 +40 +90 +90 +50 +20 +40 +ENDCHAR +STARTCHAR C254 +ENCODING 254 +SWIDTH 686 0 +DWIDTH 5 0 +BBX 5 7 0 -1 +BITMAP +00 +80 +e0 +90 +90 +e0 +80 +ENDCHAR +STARTCHAR C255 +ENCODING 255 +SWIDTH 686 0 +DWIDTH 5 0 +BBX 5 7 0 -1 +BITMAP +50 +00 +90 +90 +50 +20 +40 +ENDCHAR +ENDFONT diff --git a/src/draw/Makefile b/src/draw/Makefile new file mode 100644 index 00000000..0a542a1f --- /dev/null +++ b/src/draw/Makefile @@ -0,0 +1,4 @@ +BDF=5x7.bdf + +ao_font.h: font-convert $(BDF) + nickle font-convert $(BDF) > $@ diff --git a/src/draw/ao_blt.c b/src/draw/ao_blt.c new file mode 100644 index 00000000..e3f45221 --- /dev/null +++ b/src/draw/ao_blt.c @@ -0,0 +1,294 @@ +/* + * 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. + */ + +#include "ao.h" +#include "ao_draw.h" +#include "ao_draw_int.h" + +#define O 0 +#define I AO_ALLONES + +struct ao_merge_rop { + uint32_t ca1, cx1, ca2, cx2; +}; + +const struct ao_merge_rop ao_merge_rop[16] = { + {O, O, O, O}, /* clear 0x0 0 */ + {I, O, O, O}, /* and 0x1 src AND dst */ + {I, O, I, O}, /* andReverse 0x2 src AND NOT dst */ + {O, O, I, O}, /* copy 0x3 src */ + {I, I, O, O}, /* andInverted 0x4 NOT src AND dst */ + {O, I, O, O}, /* noop 0x5 dst */ + {O, I, I, O}, /* xor 0x6 src XOR dst */ + {I, I, I, O}, /* or 0x7 src OR dst */ + {I, I, I, I}, /* nor 0x8 NOT src AND NOT dst */ + {O, I, I, I}, /* equiv 0x9 NOT src XOR dst */ + {O, I, O, I}, /* invert 0xa NOT dst */ + {I, I, O, I}, /* orReverse 0xb src OR NOT dst */ + {O, O, I, I}, /* copyInverted 0xc NOT src */ + {I, O, I, I}, /* orInverted 0xd NOT src OR dst */ + {I, O, O, I}, /* nand 0xe NOT src OR NOT dst */ + {O, O, O, I}, /* set 0xf 1 */ +}; + +#define ao_do_merge_rop(src, dst) \ + (((dst) & (((src) & _ca1) ^ _cx1)) ^ (((src) & _ca2) ^ _cx2)) + +#define ao_do_dst_invarient_merge_rop(src) (((src) & _ca2) ^ _cx2) + +#define ao_do_mask_merge_rop(src, dst, mask) \ + (((dst) & ((((src) & _ca1) ^ _cx1) | ~(mask))) ^ ((((src) & _ca2) ^ _cx2) & (mask))) + +#define ao_dst_invarient_merge_rop() (_ca1 == 0 && _cx1 == 0) + +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) +{ + uint32_t *src, *dst; + uint32_t _ca1, _cx1, _ca2, _cx2; + uint8_t dst_invarient; + uint32_t startmask, endmask; + int16_t nmiddle, n; + uint32_t bits1, bits; + int16_t left_shift, right_shift; + + _ca1 = ao_merge_rop[rop].ca1; + _cx1 = ao_merge_rop[rop].cx1; + _ca2 = ao_merge_rop[rop].ca2; + _cx2 = ao_merge_rop[rop].cx2; + dst_invarient = ao_dst_invarient_merge_rop(); + + if (upsidedown) { + src_line += (height - 1) * src_stride; + dst_line += (height - 1) * dst_stride; + src_stride = -src_stride; + dst_stride = -dst_stride; + } + + ao_mask_bits(dst_x, width, startmask, nmiddle, endmask); + if (reverse) { + src_line += ((src_x + width - 1) >> AO_SHIFT) + 1; + dst_line += ((dst_x + width - 1) >> AO_SHIFT) + 1; + src_x = (src_x + width - 1) & AO_MASK; + dst_x = (dst_x + width - 1) & AO_MASK; + } else { + src_line += src_x >> AO_SHIFT; + dst_line += dst_x >> AO_SHIFT; + src_x &= AO_MASK; + dst_x &= AO_MASK; + } + if (src_x == dst_x) { + while (height--) { + src = src_line; + src_line += src_stride; + dst = dst_line; + dst_line += dst_stride; + if (reverse) { + if (endmask) { + bits = *--src; + --dst; + *dst = ao_do_mask_merge_rop(bits, *dst, endmask); + } + n = nmiddle; + if (dst_invarient) { + while (n--) + *--dst = ao_do_dst_invarient_merge_rop(*--src); + } + else { + while (n--) { + bits = *--src; + --dst; + *dst = ao_do_merge_rop(bits, *dst); + } + } + if (startmask) { + bits = *--src; + --dst; + *dst = ao_do_mask_merge_rop(bits, *dst, startmask); + } + } + else { + if (startmask) { + bits = *src++; + *dst = ao_do_mask_merge_rop(bits, *dst, startmask); + dst++; + } + n = nmiddle; + if (dst_invarient) { + while (n--) + *dst++ = ao_do_dst_invarient_merge_rop(*src++); + } + else { + while (n--) { + bits = *src++; + *dst = ao_do_merge_rop(bits, *dst); + dst++; + } + } + if (endmask) { + bits = *src; + *dst = ao_do_mask_merge_rop(bits, *dst, endmask); + } + } + } + } else { + if (src_x > dst_x) { + left_shift = src_x - dst_x; + right_shift = AO_UNIT - left_shift; + } else { + right_shift = dst_x - src_x; + left_shift = AO_UNIT - right_shift; + } + while (height--) { + src = src_line; + src_line += src_stride; + dst = dst_line; + dst_line += dst_stride; + + bits1 = 0; + if (reverse) { + if (src_x < dst_x) + bits1 = *--src; + if (endmask) { + bits = ao_right(bits1, right_shift); + if (ao_right(endmask, left_shift)) { + bits1 = *--src; + bits |= ao_left(bits1, left_shift); + } + --dst; + *dst = ao_do_mask_merge_rop(bits, *dst, endmask); + } + n = nmiddle; + if (dst_invarient) { + while (n--) { + bits = ao_right(bits1, right_shift); + bits1 = *--src; + bits |= ao_left(bits1, left_shift); + --dst; + *dst = ao_do_dst_invarient_merge_rop(bits); + } + } else { + while (n--) { + bits = ao_right(bits1, right_shift); + bits1 = *--src; + bits |= ao_left(bits1, left_shift); + --dst; + *dst = ao_do_merge_rop(bits, *dst); + } + } + if (startmask) { + bits = ao_right(bits1, right_shift); + if (ao_right(startmask, left_shift)) { + bits1 = *--src; + bits |= ao_left(bits1, left_shift); + } + --dst; + *dst = ao_do_mask_merge_rop(bits, *dst, startmask); + } + } + else { + if (src_x > dst_x) + bits1 = *src++; + if (startmask) { + bits = ao_left(bits1, left_shift); + if (ao_left(startmask, right_shift)) { + bits1 = *src++; + bits |= ao_right(bits1, right_shift); + } + *dst = ao_do_mask_merge_rop(bits, *dst, startmask); + dst++; + } + n = nmiddle; + if (dst_invarient) { + while (n--) { + bits = ao_left(bits1, left_shift); + bits1 = *src++; + bits |= ao_right(bits1, right_shift); + *dst = ao_do_dst_invarient_merge_rop(bits); + dst++; + } + } + else { + while (n--) { + bits = ao_left(bits1, left_shift); + bits1 = *src++; + bits |= ao_right(bits1, right_shift); + *dst = ao_do_merge_rop(bits, *dst); + dst++; + } + } + if (endmask) { + bits = ao_left(bits1, left_shift); + if (ao_left(endmask, right_shift)) { + bits1 = *src; + bits |= ao_right(bits1, right_shift); + } + *dst = ao_do_mask_merge_rop(bits, *dst, endmask); + } + } + } + } +} + +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) +{ + uint32_t startmask, endmask; + int16_t nmiddle; + int16_t n; + + dst += dst_x >> AO_SHIFT; + dst_x &= AO_MASK; + + ao_mask_bits(dst_x, width, startmask, nmiddle, endmask); + + if (startmask) + dst_stride--; + + dst_stride -= nmiddle; + while (height--) { + if (startmask) { + *dst = ao_do_mask_rrop(*dst, and, xor, startmask); + dst++; + } + n = nmiddle; + if (!and) + while (n--) + *dst++ = xor; + else + while (n--) { + *dst = ao_do_rrop(*dst, and, xor); + dst++; + } + if (endmask) + *dst = ao_do_mask_rrop(*dst, and, xor, endmask); + dst += dst_stride; + } +} diff --git a/src/draw/ao_copy.c b/src/draw/ao_copy.c new file mode 100644 index 00000000..47067bb8 --- /dev/null +++ b/src/draw/ao_copy.c @@ -0,0 +1,75 @@ +/* + * 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. + */ + +#include "ao.h" +#include "ao_draw.h" +#include "ao_draw_int.h" + +#define bound(val,max,other) do { \ + if (val < 0) { \ + other -= val; \ + val = 0; \ + } \ + if (val > max) { \ + other -= (val - max); \ + val = max; \ + } \ + } while (0) + +#define bound2(a, max_a, b, max_b) do { \ + bound(a, max_a, b); \ + bound(b, max_b, a); \ + } while (0) + +void +ao_copy(const struct ao_bitmap *dst, + int16_t dst_x, + int16_t dst_y, + int16_t width, + int16_t height, + const struct ao_bitmap *src, + int16_t src_x, + int16_t src_y, + uint8_t rop) +{ + int16_t dst_x2 = dst_x + width, dst_y2 = dst_y + height; + int16_t src_x2 = src_x + width, src_y2 = src_y + height; + uint8_t reverse = 0; + uint8_t upsidedown = 0; + + bound2(dst_x, dst->width, src_x, src->width); + bound2(dst_x2, dst->width, src_x2, src->width); + bound2(dst_y, dst->height, src_y, src->height); + bound2(dst_y2, dst->height, src_y2, src->height); + + if (dst == src) { + reverse = (dst_x > src_x); + upsidedown = (dst_y > src_y); + } + + if (dst_x < dst_x2 && dst_y < dst_y2) { + ao_blt(src->base + src_y * src->stride, + src->stride, + src_x, + dst->base + dst_y * dst->stride, + dst->stride, + dst_x, + dst_x2 - dst_x, + dst_y2 - dst_y, + rop, + reverse, + upsidedown); + } +} + diff --git a/src/draw/ao_draw.h b/src/draw/ao_draw.h new file mode 100644 index 00000000..92150fc1 --- /dev/null +++ b/src/draw/ao_draw.h @@ -0,0 +1,119 @@ +/* + * 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_ + +struct ao_bitmap { + uint32_t *base; + int16_t stride; /* in units */ + int16_t width; /* in pixels */ + int16_t height; /* in pixels */ +}; + +struct ao_pattern { + uint8_t pattern[8]; +}; + +void +ao_copy(const struct ao_bitmap *dst, + int16_t dst_x, + int16_t dst_y, + int16_t width, + int16_t height, + const struct ao_bitmap *src, + int16_t src_x, + int16_t src_y, + uint8_t rop); + +void +ao_rect(const struct ao_bitmap *dst, + int16_t x, + int16_t y, + int16_t width, + int16_t height, + uint32_t fill, + uint8_t rop); + +void +ao_pattern(const struct ao_bitmap *dst, + int16_t x, + int16_t y, + int16_t width, + int16_t height, + const struct ao_pattern *pattern, + int16_t pat_x, + int16_t pat_y, + uint8_t rop); + +void +ao_line(const struct ao_bitmap *dst, + int16_t x1, + int16_t y1, + int16_t x2, + int16_t y2, + uint32_t fill, + uint8_t rop); + +void +ao_text(const struct ao_bitmap *dst, + int16_t x, + int16_t y, + char *string, + uint32_t fill, + uint8_t rop); + +struct ao_font { + int width; + int height; + int ascent; + int descent; +}; + +extern const struct ao_font ao_font; + +#define AO_SHIFT 5 +#define AO_UNIT (1 << AO_SHIFT) +#define AO_MASK (AO_UNIT - 1) +#define AO_ALLONES ((uint32_t) -1) + +/* + * dst + * 0 1 + * + * 0 a b + * src + * 1 c d + * + * ROP = abcd + */ + +#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_ */ diff --git a/src/draw/ao_draw_int.h b/src/draw/ao_draw_int.h new file mode 100644 index 00000000..433aa409 --- /dev/null +++ b/src/draw/ao_draw_int.h @@ -0,0 +1,136 @@ +/* + * 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_INT_H_ +#define _AO_DRAW_INT_H_ + +static inline uint32_t +ao_expand(uint32_t bits) +{ + return ~((bits & 1)-1); +} + +static inline uint32_t +ao_xor(uint8_t rop, uint32_t fg) +{ + fg = ao_expand(fg); + + return (fg & ao_expand(rop >> 1)) | + (~fg & ao_expand(rop >> 3)); +} + +static inline uint32_t +ao_and(uint8_t rop, uint32_t fg) +{ + fg = ao_expand(fg); + + return (fg & ao_expand(rop ^ (rop >> 1))) | + (~fg & ao_expand((rop>>2) ^ (rop>>3))); +} + +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; \ +} + +#define ao_clip(val,min,max) do { \ + if (val < min) { \ + val = min; \ + } else if (val > max) { \ + val = max; \ + } \ + } while (0) + +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; +} + +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); + +int16_t +ao_glyph(const struct ao_bitmap *dst, + int16_t x, + int16_t y, + uint8_t c, + uint8_t rop); + +#endif /* _AO_DRAW_INT_H_ */ diff --git a/src/draw/ao_font.h b/src/draw/ao_font.h new file mode 100644 index 00000000..5e31dd11 --- /dev/null +++ b/src/draw/ao_font.h @@ -0,0 +1,139 @@ +static const uint8_t glyph_bytes[1568] = { + 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x00, 0x00, 0x04, 0x0e, 0x1f, 0x0e, 0x04, 0x00, 0x0a, 0x05, + 0x0a, 0x05, 0x0a, 0x05, 0x00, 0x05, 0x07, 0x05, 0x05, 0x0e, 0x04, 0x04, 0x03, 0x01, 0x03, 0x0d, + 0x04, 0x0c, 0x04, 0x03, 0x01, 0x03, 0x06, 0x0a, 0x06, 0x0a, 0x01, 0x01, 0x03, 0x0c, 0x04, 0x0c, + 0x04, 0x04, 0x0a, 0x04, 0x00, 0x00, 0x00, 0x00, 0x04, 0x0e, 0x04, 0x00, 0x0e, 0x00, 0x00, 0x09, + 0x0b, 0x0d, 0x09, 0x04, 0x04, 0x0c, 0x05, 0x05, 0x05, 0x02, 0x0e, 0x04, 0x04, 0x04, 0x04, 0x04, + 0x07, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x07, 0x04, 0x04, 0x04, 0x00, 0x00, 0x00, 0x1c, 0x04, + 0x04, 0x04, 0x04, 0x04, 0x04, 0x1c, 0x00, 0x00, 0x00, 0x04, 0x04, 0x04, 0x1f, 0x04, 0x04, 0x04, + 0x00, 0x1f, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x1f, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x1f, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x1f, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x1f, 0x00, 0x04, 0x04, 0x04, 0x1c, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x07, 0x04, 0x04, + 0x04, 0x04, 0x04, 0x04, 0x1f, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x1f, 0x04, 0x04, 0x04, 0x04, + 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x08, 0x04, 0x02, 0x04, 0x08, 0x0e, 0x00, 0x02, 0x04, 0x08, + 0x04, 0x02, 0x0e, 0x00, 0x00, 0x00, 0x0e, 0x0a, 0x0a, 0x0a, 0x00, 0x00, 0x08, 0x0e, 0x04, 0x0e, + 0x02, 0x00, 0x00, 0x0c, 0x02, 0x07, 0x02, 0x0d, 0x00, 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x04, 0x04, 0x04, 0x04, 0x00, 0x04, 0x00, 0x0a, 0x0a, + 0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0a, 0x1f, 0x0a, 0x1f, 0x0a, 0x00, 0x00, 0x0e, 0x05, 0x0e, + 0x14, 0x0e, 0x00, 0x01, 0x09, 0x04, 0x02, 0x09, 0x08, 0x00, 0x00, 0x02, 0x05, 0x02, 0x05, 0x0a, + 0x00, 0x06, 0x02, 0x01, 0x00, 0x00, 0x00, 0x00, 0x04, 0x02, 0x02, 0x02, 0x02, 0x04, 0x00, 0x02, + 0x04, 0x04, 0x04, 0x04, 0x02, 0x00, 0x00, 0x05, 0x02, 0x07, 0x02, 0x05, 0x00, 0x00, 0x04, 0x04, + 0x1f, 0x04, 0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x06, 0x02, 0x01, 0x00, 0x00, 0x00, 0x0f, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x06, 0x06, 0x00, 0x00, 0x08, 0x04, 0x02, 0x01, 0x00, 0x00, + 0x02, 0x05, 0x05, 0x05, 0x05, 0x02, 0x00, 0x02, 0x03, 0x02, 0x02, 0x02, 0x07, 0x00, 0x06, 0x09, + 0x08, 0x04, 0x02, 0x0f, 0x00, 0x0f, 0x08, 0x06, 0x08, 0x09, 0x06, 0x00, 0x04, 0x06, 0x05, 0x0f, + 0x04, 0x04, 0x00, 0x0f, 0x01, 0x07, 0x08, 0x09, 0x06, 0x00, 0x06, 0x01, 0x07, 0x09, 0x09, 0x06, + 0x00, 0x0f, 0x08, 0x04, 0x04, 0x02, 0x02, 0x00, 0x06, 0x09, 0x06, 0x09, 0x09, 0x06, 0x00, 0x06, + 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0x07, 0x01, 0x01, 0x00, 0x06, 0x09, 0x09, 0x09, 0x0b, 0x06, 0x08, 0x07, 0x09, + 0x09, 0x07, 0x05, 0x09, 0x00, 0x06, 0x09, 0x02, 0x04, 0x09, 0x06, 0x00, 0x07, 0x02, 0x02, 0x02, + 0x02, 0x02, 0x00, 0x09, 0x09, 0x09, 0x09, 0x09, 0x06, 0x00, 0x09, 0x09, 0x09, 0x09, 0x06, 0x06, + 0x00, 0x09, 0x09, 0x09, 0x0f, 0x0f, 0x09, 0x00, 0x09, 0x09, 0x06, 0x06, 0x09, 0x09, 0x00, 0x05, + 0x05, 0x05, 0x02, 0x02, 0x02, 0x00, 0x0f, 0x08, 0x04, 0x02, 0x01, 0x0f, 0x00, 0x07, 0x01, 0x01, + 0x01, 0x01, 0x07, 0x00, 0x00, 0x01, 0x02, 0x04, 0x08, 0x00, 0x00, 0x07, 0x04, 0x04, 0x04, 0x04, + 0x07, 0x00, 0x02, 0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0f, 0x00, + 0x03, 0x02, 0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0e, 0x09, 0x0d, 0x0a, 0x00, 0x01, 0x01, + 0x07, 0x09, 0x09, 0x07, 0x00, 0x00, 0x00, 0x06, 0x01, 0x01, 0x06, 0x00, 0x08, 0x08, 0x0e, 0x09, + 0x09, 0x0e, 0x00, 0x00, 0x00, 0x06, 0x0d, 0x03, 0x06, 0x00, 0x04, 0x0a, 0x02, 0x07, 0x02, 0x02, + 0x00, 0x00, 0x00, 0x0e, 0x09, 0x06, 0x01, 0x0e, 0x01, 0x01, 0x07, 0x09, 0x09, 0x09, 0x00, 0x02, + 0x00, 0x03, 0x02, 0x02, 0x07, 0x00, 0x04, 0x00, 0x04, 0x04, 0x04, 0x05, 0x02, 0x01, 0x01, 0x05, + 0x03, 0x05, 0x09, 0x00, 0x03, 0x02, 0x02, 0x02, 0x02, 0x07, 0x00, 0x00, 0x00, 0x05, 0x0f, 0x09, + 0x09, 0x00, 0x00, 0x00, 0x07, 0x09, 0x09, 0x09, 0x00, 0x00, 0x00, 0x06, 0x09, 0x09, 0x06, 0x00, + 0x00, 0x00, 0x07, 0x09, 0x09, 0x07, 0x01, 0x00, 0x00, 0x0e, 0x09, 0x09, 0x0e, 0x08, 0x00, 0x00, + 0x07, 0x09, 0x01, 0x01, 0x00, 0x00, 0x00, 0x0e, 0x03, 0x0c, 0x07, 0x00, 0x02, 0x02, 0x07, 0x02, + 0x02, 0x0c, 0x00, 0x00, 0x00, 0x09, 0x09, 0x09, 0x0e, 0x00, 0x00, 0x00, 0x05, 0x05, 0x05, 0x02, + 0x00, 0x00, 0x00, 0x09, 0x09, 0x0f, 0x0f, 0x00, 0x00, 0x00, 0x09, 0x06, 0x06, 0x09, 0x00, 0x00, + 0x00, 0x09, 0x09, 0x0a, 0x04, 0x02, 0x00, 0x00, 0x0f, 0x04, 0x02, 0x0f, 0x00, 0x04, 0x02, 0x03, + 0x02, 0x02, 0x04, 0x00, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x00, 0x01, 0x02, 0x06, 0x02, 0x02, + 0x01, 0x00, 0x0a, 0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x04, 0x00, 0x04, 0x04, 0x04, 0x04, 0x00, 0x00, 0x04, + 0x0e, 0x05, 0x05, 0x0e, 0x04, 0x00, 0x0c, 0x02, 0x07, 0x02, 0x0d, 0x00, 0x00, 0x11, 0x0e, 0x0a, + 0x0e, 0x11, 0x00, 0x05, 0x05, 0x02, 0x07, 0x02, 0x02, 0x00, 0x00, 0x04, 0x04, 0x00, 0x04, 0x04, + 0x00, 0x0c, 0x02, 0x06, 0x0a, 0x0c, 0x08, 0x06, 0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0e, + 0x11, 0x15, 0x13, 0x15, 0x11, 0x0e, 0x06, 0x05, 0x06, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x12, + 0x09, 0x12, 0x00, 0x00, 0x00, 0x00, 0x0f, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0f, 0x00, + 0x00, 0x00, 0x0e, 0x11, 0x17, 0x13, 0x13, 0x11, 0x0e, 0x0f, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x04, 0x0a, 0x04, 0x00, 0x00, 0x00, 0x00, 0x04, 0x04, 0x1f, 0x04, 0x04, 0x1f, 0x00, 0x06, 0x04, + 0x02, 0x06, 0x00, 0x00, 0x00, 0x06, 0x06, 0x04, 0x06, 0x00, 0x00, 0x00, 0x04, 0x02, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x09, 0x09, 0x09, 0x07, 0x01, 0x0e, 0x0b, 0x0b, 0x0a, 0x0a, 0x0a, + 0x00, 0x00, 0x06, 0x06, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x04, 0x02, 0x04, + 0x06, 0x04, 0x0e, 0x00, 0x00, 0x00, 0x02, 0x05, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x09, + 0x12, 0x09, 0x00, 0x00, 0x01, 0x01, 0x01, 0x09, 0x0c, 0x0e, 0x08, 0x01, 0x01, 0x01, 0x0d, 0x08, + 0x04, 0x0c, 0x03, 0x03, 0x02, 0x0b, 0x0c, 0x0e, 0x08, 0x02, 0x00, 0x02, 0x01, 0x05, 0x02, 0x00, + 0x06, 0x09, 0x09, 0x0f, 0x09, 0x09, 0x00, 0x06, 0x09, 0x09, 0x0f, 0x09, 0x09, 0x00, 0x06, 0x09, + 0x09, 0x0f, 0x09, 0x09, 0x00, 0x06, 0x09, 0x09, 0x0f, 0x09, 0x09, 0x00, 0x06, 0x09, 0x09, 0x0f, + 0x09, 0x09, 0x00, 0x06, 0x09, 0x09, 0x0f, 0x09, 0x09, 0x00, 0x0e, 0x05, 0x0d, 0x07, 0x05, 0x0d, + 0x00, 0x06, 0x09, 0x01, 0x01, 0x09, 0x06, 0x02, 0x0f, 0x01, 0x07, 0x01, 0x01, 0x0f, 0x00, 0x0f, + 0x01, 0x07, 0x01, 0x01, 0x0f, 0x00, 0x0f, 0x01, 0x07, 0x01, 0x01, 0x0f, 0x00, 0x0f, 0x01, 0x07, + 0x01, 0x01, 0x0f, 0x00, 0x07, 0x02, 0x02, 0x02, 0x02, 0x07, 0x00, 0x07, 0x02, 0x02, 0x02, 0x02, + 0x07, 0x00, 0x07, 0x02, 0x02, 0x02, 0x02, 0x07, 0x00, 0x07, 0x02, 0x02, 0x02, 0x02, 0x07, 0x00, + 0x07, 0x0a, 0x0b, 0x0a, 0x0a, 0x07, 0x00, 0x0d, 0x09, 0x0b, 0x0d, 0x0d, 0x09, 0x00, 0x06, 0x09, + 0x09, 0x09, 0x09, 0x06, 0x00, 0x06, 0x09, 0x09, 0x09, 0x09, 0x06, 0x00, 0x06, 0x09, 0x09, 0x09, + 0x09, 0x06, 0x00, 0x06, 0x09, 0x09, 0x09, 0x09, 0x06, 0x00, 0x06, 0x09, 0x09, 0x09, 0x09, 0x06, + 0x00, 0x00, 0x00, 0x09, 0x06, 0x06, 0x09, 0x00, 0x0e, 0x0d, 0x0d, 0x0b, 0x0b, 0x07, 0x00, 0x09, + 0x09, 0x09, 0x09, 0x09, 0x06, 0x00, 0x09, 0x09, 0x09, 0x09, 0x09, 0x06, 0x00, 0x09, 0x09, 0x09, + 0x09, 0x09, 0x06, 0x00, 0x09, 0x09, 0x09, 0x09, 0x09, 0x06, 0x00, 0x05, 0x05, 0x05, 0x02, 0x02, + 0x02, 0x00, 0x01, 0x07, 0x09, 0x07, 0x01, 0x01, 0x00, 0x06, 0x09, 0x07, 0x09, 0x0b, 0x05, 0x01, + 0x02, 0x04, 0x0e, 0x09, 0x0d, 0x0a, 0x00, 0x04, 0x02, 0x0e, 0x09, 0x0d, 0x0a, 0x00, 0x04, 0x0a, + 0x0e, 0x09, 0x0d, 0x0a, 0x00, 0x0a, 0x05, 0x0e, 0x09, 0x0d, 0x0a, 0x00, 0x0a, 0x00, 0x0e, 0x09, + 0x0d, 0x0a, 0x00, 0x06, 0x06, 0x0e, 0x09, 0x0d, 0x0a, 0x00, 0x00, 0x00, 0x0e, 0x0d, 0x05, 0x0e, + 0x00, 0x00, 0x00, 0x06, 0x01, 0x01, 0x06, 0x02, 0x02, 0x04, 0x06, 0x0d, 0x03, 0x06, 0x00, 0x04, + 0x02, 0x06, 0x0d, 0x03, 0x06, 0x00, 0x02, 0x05, 0x06, 0x0d, 0x03, 0x06, 0x00, 0x05, 0x00, 0x06, + 0x0d, 0x03, 0x06, 0x00, 0x01, 0x02, 0x03, 0x02, 0x02, 0x07, 0x00, 0x02, 0x01, 0x03, 0x02, 0x02, + 0x07, 0x00, 0x02, 0x05, 0x03, 0x02, 0x02, 0x07, 0x00, 0x05, 0x00, 0x03, 0x02, 0x02, 0x07, 0x00, + 0x02, 0x0c, 0x06, 0x09, 0x09, 0x06, 0x00, 0x0a, 0x05, 0x07, 0x09, 0x09, 0x09, 0x00, 0x02, 0x04, + 0x06, 0x09, 0x09, 0x06, 0x00, 0x04, 0x02, 0x06, 0x09, 0x09, 0x06, 0x00, 0x06, 0x00, 0x06, 0x09, + 0x09, 0x06, 0x00, 0x0a, 0x05, 0x06, 0x09, 0x09, 0x06, 0x00, 0x05, 0x00, 0x06, 0x09, 0x09, 0x06, + 0x00, 0x00, 0x06, 0x00, 0x0f, 0x00, 0x06, 0x00, 0x00, 0x00, 0x0e, 0x0d, 0x0b, 0x07, 0x00, 0x02, + 0x04, 0x09, 0x09, 0x09, 0x0e, 0x00, 0x04, 0x02, 0x09, 0x09, 0x09, 0x0e, 0x00, 0x06, 0x00, 0x09, + 0x09, 0x09, 0x0e, 0x00, 0x0a, 0x00, 0x09, 0x09, 0x09, 0x0e, 0x00, 0x04, 0x02, 0x09, 0x09, 0x0a, + 0x04, 0x02, 0x00, 0x01, 0x07, 0x09, 0x09, 0x07, 0x01, 0x0a, 0x00, 0x09, 0x09, 0x0a, 0x04, 0x02, +}; + +static const uint16_t glyph_pos[256] = { + 0, 7, 14, 21, 28, 35, 42, 49, + 56, 63, 70, 77, 84, 91, 98, 105, + 112, 119, 126, 133, 140, 147, 154, 161, + 168, 175, 182, 189, 196, 203, 210, 217, + 224, 231, 238, 245, 252, 259, 266, 273, + 280, 287, 294, 301, 308, 315, 322, 329, + 336, 343, 350, 357, 364, 371, 378, 385, + 392, 399, 406, 413, 420, 427, 434, 441, + 448, 455, 462, 469, 476, 483, 490, 497, + 504, 511, 518, 525, 532, 539, 546, 553, + 560, 567, 574, 581, 588, 595, 602, 609, + 616, 623, 630, 637, 644, 651, 658, 665, + 672, 679, 686, 693, 700, 707, 714, 721, + 728, 735, 742, 749, 756, 763, 770, 777, + 784, 791, 798, 805, 812, 819, 826, 833, + 840, 847, 854, 861, 868, 875, 882, 889, + 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, + 896, 903, 910, 917, 924, 931, 938, 945, + 952, 959, 966, 973, 980, 987, 994, 1001, + 1008, 1015, 1022, 1029, 1036, 1043, 1050, 1057, + 1064, 1071, 1078, 1085, 1092, 1099, 1106, 1113, + 1120, 1127, 1134, 1141, 1148, 1155, 1162, 1169, + 1176, 1183, 1190, 1197, 1204, 1211, 1218, 1225, + 1232, 1239, 1246, 1253, 1260, 1267, 1274, 1281, + 1288, 1295, 1302, 1309, 1316, 1323, 1330, 1337, + 1344, 1351, 1358, 1365, 1372, 1379, 1386, 1393, + 1400, 1407, 1414, 1421, 1428, 1435, 1442, 1449, + 1456, 1463, 1470, 1477, 1484, 1491, 1498, 1505, + 1512, 1519, 1526, 1533, 1540, 1547, 1554, 1561, +}; + +#define GLYPH_WIDTH 5 +#define GLYPH_HEIGHT 7 +#define GLYPH_ASCENT 6 diff --git a/src/draw/ao_line.c b/src/draw/ao_line.c new file mode 100644 index 00000000..ed1fc21c --- /dev/null +++ b/src/draw/ao_line.c @@ -0,0 +1,314 @@ +/* + * 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. + */ + +#include "ao.h" +#include "ao_draw.h" +#include "ao_draw_int.h" + +#define ao_mask(x,w) (ao_right(AO_ALLONES,(x) & AO_MASK) & \ + ao_left(AO_ALLONES,(FB_UNIT - ((x)+(w))) & AO_MASK)) + + +/* out of clip region codes */ +#define OUT_LEFT 0x08 +#define OUT_RIGHT 0x04 +#define OUT_ABOVE 0x02 +#define OUT_BELOW 0x01 + +/* major axis for bresenham's line */ +#define X_AXIS 0 +#define Y_AXIS 1 + +/* + * Line clipping. Clip to the box, bringing the coordinates forward while + * preserving the actual slope and error + * + * + * X major line, clip X: + * + * adjust_x = -x; + * + * e += adjust_x * e1; + * + * adjust_y = (e + -e3-1) / -e3; + * + * e -= adjust_y / -e3; + * + * X major line, clip Y: + * + * adjust_y = -y; + + * + * e -= adjust_y / -e3; + * + * adjust_x = e / e1; + */ + + + + +static void +ao_bres(const struct ao_bitmap *dst_bitmap, + int16_t signdx, + int16_t signdy, + int16_t axis, + int16_t x1, + int16_t y1, + int16_t e, + int16_t e1, + int16_t e3, + int16_t len, + uint32_t and, + uint32_t xor) +{ + int16_t stride = dst_bitmap->stride; + uint32_t *dst = dst_bitmap->base; + uint32_t mask0, mask; + + mask0 = 1; + if (signdx < 0) + mask0 = ao_right(1, AO_UNIT - 1); + + if (signdy < 0) + stride = -stride; + + dst = dst + y1 * stride + (x1 >> AO_SHIFT); + mask = ao_right(1, x1 & AO_MASK); + + while (len--) { + /* clip each point */ + + *dst = ao_do_mask_rrop(*dst, and, xor, mask); + + if (axis == X_AXIS) { + if (signdx < 0) + mask = ao_left(mask, 1); + else + mask = ao_right(mask, 1); + if (!mask) { + dst += signdx; + mask = mask0; + } + e += e1; + if (e >= 0) { + dst += stride; + e += e3; + } + } else { + dst += stride; + e += e1; + if (e >= 0) { + if (signdx < 0) + mask = ao_left(mask, 1); + else + mask = ao_right(mask, 1); + if (!mask) { + dst += signdx; + mask = mask0; + } + e += e3; + } + } + } +} + +struct ao_cc { + int16_t major; + int16_t minor; + int16_t sign_major; + int16_t sign_minor; + int16_t e; + int16_t e1; + int16_t e3; + int8_t first; +}; + +/* line clipping box */ +struct ao_cbox { + int16_t maj1, min1; + int16_t maj2, min2; +}; + +/* -b <= a, so we need to make a bigger */ +static int16_t +div_ceil(int32_t a, int16_t b) { + return (a + b + b - 1) / b - 1; +} + +static int16_t +div_floor_plus_one(int32_t a, int16_t b) { + return (a + b) / b; +} + +static int8_t +ao_clip_line(struct ao_cc *c, struct ao_cbox *b) +{ + int32_t adjust_major = 0, adjust_minor = 0; + + /* Clip major axis */ + if (c->major < b->maj1) { + if (c->sign_major <= 0) + return FALSE; + adjust_major = b->maj1 - c->major; + } else if (c->major >= b->maj2) { + if (c->sign_major >= 0) + return FALSE; + adjust_major = c->major - (b->maj2-1); + } + + /* Clip minor axis */ + if (c->minor < b->min1) { + if (c->sign_minor <= 0) + return FALSE; + adjust_minor = b->min1 - c->minor; + } else if (c->minor >= b->min2) { + if (c->sign_minor >= 0) + return FALSE; + adjust_minor = c->minor - (b->min2-1); + } + + /* If unclipped, we're done */ + if (adjust_major == 0 && adjust_minor == 0) + return TRUE; + + /* See how much minor adjustment would happen during + * a major clip. This is a bit tricky because line drawing + * isn't symmetrical when the line passes exactly between + * two pixels, we have to pick which one gets drawn + */ + int32_t adj_min; + + if (!c->first) + adj_min = div_ceil(c->e + adjust_major * c->e1, -c->e3); + else + adj_min = div_floor_plus_one(c->e + adjust_major * c->e1, -c->e3); + + if (adj_min < adjust_minor) { + if (c->first) + adjust_major = div_ceil(c->e - adjust_minor * c->e3, c->e1); + else + adjust_major = div_floor_plus_one(c->e - adjust_minor * c->e3, c->e1); + } else { + adjust_minor = adj_min; + } + + c->e += adjust_major * c->e1 + adjust_minor * c->e3; + + c->major += c->sign_major * adjust_major; + c->minor += c->sign_minor * adjust_minor; + + return TRUE; +} + +void +ao_line(const struct ao_bitmap *dst, + int16_t x1, + int16_t y1, + int16_t x2, + int16_t y2, + uint32_t fill, + uint8_t rop) +{ + int16_t adx, ady; + int16_t e, e1, e2, e3; + int16_t signdx = 1, signdy = 1; + int16_t axis; + int16_t len; + struct ao_cc clip_1, clip_2; + struct ao_cbox cbox; + + if ((adx = x2 - x1) < 0) { + adx = -adx; + signdx = -1; + } + if ((ady = y2 - y1) < 0) { + ady = -ady; + signdy = -1; + } + + if (adx > ady) { + axis = X_AXIS; + e1 = ady << 1; + e2 = e1 - (adx << 1); + e = e1 - adx; + + clip_1.major = x1; + clip_1.minor = y1; + clip_2.major = x2; + clip_2.minor = y2; + clip_1.sign_major = signdx; + clip_1.sign_minor = signdy; + + cbox.maj1 = 0; + cbox.maj2 = dst->width; + cbox.min1 = 0; + cbox.min2 = dst->height; + } else { + axis = Y_AXIS; + e1 = adx << 1; + e2 = e1 - (ady << 1); + e = e1 - ady; + + clip_1.major = y1; + clip_1.minor = x1; + clip_2.major = y2; + clip_2.minor = x2; + clip_1.sign_major = signdy; + clip_1.sign_minor = signdx; + + cbox.maj1 = 0; + cbox.maj2 = dst->height; + cbox.min1 = 0; + cbox.min2 = dst->width; + } + + e3 = e2 - e1; + e = e - e1; + + clip_1.first = TRUE; + clip_2.first = FALSE; + clip_2.e = clip_1.e = e; + clip_2.e1 = clip_1.e1 = e1; + clip_2.e3 = clip_1.e3 = e3; + clip_2.sign_major = -clip_1.sign_major; + clip_2.sign_minor = -clip_1.sign_minor; + + if (!ao_clip_line(&clip_1, &cbox)) + return; + + if (!ao_clip_line(&clip_2, &cbox)) + return; + + len = clip_1.sign_major * (clip_2.major - clip_1.major) + clip_2.first; + + if (len <= 0) + return; + + if (adx > ady) { + x1 = clip_1.major; + y1 = clip_1.minor; + } else { + x1 = clip_1.minor; + y1 = clip_1.major; + } + ao_bres(dst, + signdx, + signdy, + axis, + x1, + y1, + clip_1.e, e1, e3, len, + ao_and(rop, fill), + ao_xor(rop, fill)); +} diff --git a/src/draw/ao_pattern.c b/src/draw/ao_pattern.c new file mode 100644 index 00000000..0d1dc765 --- /dev/null +++ b/src/draw/ao_pattern.c @@ -0,0 +1,80 @@ +/* + * 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. + */ + +#include "ao.h" +#include "ao_draw.h" +#include "ao_draw_int.h" + +static inline uint32_t +ao_pattern_expand(uint8_t v, uint8_t rot) +{ + uint32_t r; + + if (rot) + v = ao_left(v, 8-rot) | ao_right(v, rot); + r = v; + return (r << 24) | (r << 16) | (r << 8) | (r); +} + +static inline int +min(int a, int b) { + return a < b ? a : b; +} + +void +ao_pattern(const struct ao_bitmap *dst, + int16_t x, + int16_t y, + int16_t width, + int16_t height, + const struct ao_pattern *pattern, + int16_t pat_x, + int16_t pat_y, + uint8_t rop) +{ + uint32_t pat[8]; + + int16_t x2 = x + width; + int16_t y2 = y + height; + + ao_clip(x, 0, dst->width); + ao_clip(x2, 0, dst->width); + ao_clip(y, 0, dst->height); + ao_clip(y2, 0, dst->height); + + if (x < x2 && y < y2) { + int xrot = (x - pat_x) & 7; + int yrot = (y - pat_y) & 7; + int i; + int16_t dst_x, dst_y; + + for (i = 0; i < 8; i++) + pat[(i + yrot) & 7] = ao_pattern_expand(pattern->pattern[i], xrot); + for (dst_y = y; dst_y < y2; dst_y += 8) { + int h = min(y2 - dst_y, 8); + for (dst_x = x; dst_x < x2; dst_x += 8) { + int w = min(x2 - dst_x, 8); + + ao_blt(pat, 1, 0, + dst->base + dst_y * dst->stride, + dst->stride, + dst_x, + w, h, + rop, + 0, 0); + } + } + } +} + diff --git a/src/draw/ao_rect.c b/src/draw/ao_rect.c new file mode 100644 index 00000000..71fa4aea --- /dev/null +++ b/src/draw/ao_rect.c @@ -0,0 +1,46 @@ +/* + * 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. + */ + +#include "ao.h" +#include "ao_draw.h" +#include "ao_draw_int.h" + +void +ao_rect(const struct ao_bitmap *dst, + int16_t x, + int16_t y, + int16_t width, + int16_t height, + uint32_t fill, + uint8_t rop) +{ + int16_t x2 = x + width; + int16_t y2 = y + height; + + ao_clip(x, 0, dst->width); + ao_clip(x2, 0, dst->width); + ao_clip(y, 0, dst->height); + ao_clip(y2, 0, dst->height); + + if (x < x2 && y < y2) { + ao_solid(ao_and(rop, fill), + ao_xor(rop, fill), + dst->base + y * dst->stride, + dst->stride, + x, + x2 - x, + y2 - y); + } +} + diff --git a/src/draw/ao_text.c b/src/draw/ao_text.c new file mode 100644 index 00000000..7ce2a623 --- /dev/null +++ b/src/draw/ao_text.c @@ -0,0 +1,65 @@ +/* + * 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. + */ + +#include "ao.h" +#include "ao_draw.h" +#include "ao_draw_int.h" +#include "ao_font.h" + +const struct ao_font ao_font = { + .width = GLYPH_WIDTH, + .height = GLYPH_HEIGHT, + .ascent = GLYPH_ASCENT, + .descent = GLYPH_HEIGHT - GLYPH_ASCENT, +}; + +void +ao_text(const struct ao_bitmap *dst, + int16_t x, + int16_t y, + char *string, + uint32_t fill, + uint8_t rop) +{ + uint32_t src[GLYPH_HEIGHT]; + char c; + int h; + + struct ao_bitmap src_bitmap = { + .base = src, + .stride = 1, + .width = GLYPH_WIDTH, + .height = GLYPH_HEIGHT + }; + + y -= GLYPH_ASCENT; + + rop = (rop & 3) | 0x4; + + if ((fill&1) == 0) + rop ^= 3; + + while ((c = *string++)) { + const uint8_t *bytes = &glyph_bytes[glyph_pos[(uint8_t) c]]; + + for (h = 0; h < GLYPH_HEIGHT; h++) + src[h] = bytes[h]; + + ao_copy(dst, + x, y, GLYPH_WIDTH, GLYPH_HEIGHT, + &src_bitmap, + 0, 0, rop); + x += GLYPH_WIDTH; + } +} diff --git a/src/draw/font-convert b/src/draw/font-convert new file mode 100755 index 00000000..1985e418 --- /dev/null +++ b/src/draw/font-convert @@ -0,0 +1,150 @@ +#!/usr/bin/nickle + +typedef struct { + int[] bytes; + int width; + int height; + int encoding; + int location; +} glyph_t; + +typedef struct { + glyph_t[...] glyphs; + int default_char; + int ascent; +} font_t; + +glyph_t +read_glyph(file f) +{ + glyph_t glyph = { .encoding = -1, .bytes = (int[...]){}, .width = 0 }; + + while (!File::end(f)) { + string l = fgets(f); + + string[*] tokens = String::split(l, " "); + if (dim(tokens) == 0) + continue; + + switch (tokens[0]) { + case "ENCODING": + glyph.encoding = atoi(tokens[1]); + break; + case "DWIDTH": + glyph.width = atoi(tokens[1]); + break; + case "BBX": + glyph.height = atoi(tokens[2]); + break; + case "ENDCHAR": + return glyph; + case "BITMAP": + while (!File::end(f)) { + string l = fgets(f); + if (l == "ENDCHAR") + return glyph; + glyph.bytes[dim(glyph.bytes)] = atoi(l, 16); + } + break; + } + } + return glyph; +} + +font_t read_font(file f) { + font_t font = { .glyphs = {}, .default_char = -1 }; + bool in_head = true; + + while (in_head && !File::end(f)) { + string l = File::fgets(f); + + string[*] tokens = String::split(l, " "); + switch (tokens[0]) { + case "DEFAULT_CHAR": + font.default_char = atoi(tokens[1]); + break; + case "FONT_ASCENT": + font.ascent = atoi(tokens[1]); + break; + case "CHARS": + in_head = false; + break; + } + } + while (!File::end(f)) { + glyph_t glyph = read_glyph(f); + if (glyph.encoding == -1) + break; + font.glyphs[dim(font.glyphs)] = glyph; + } + return font; +} + +int +flip_byte(int x) +{ + int dest = 0; + + for (int i = 0; i < 8; i++) + dest |= ((x >> (7 - i)) & 1) << i; + return dest; +} + +void print_font(font_t font) { + int width = font.glyphs[0].width; + int height = font.glyphs[0].height; + int[256] pos = { -1 ... }; + int[...] bytes; + + if (false) { + for (int i = 1; i < dim(font.glyphs); i++) { + if (font.glyphs[i].width != width || + font.glyphs[i].height != height) + { + File::fprintf(stderr, "font not constant size, glyph %d is %dx%d\n", + font.glyphs[i].encoding, font.glyphs[i].width, font.glyphs[i].height); + exit(1); + } + } + } + + if (font.default_char == -1) + font.default_char = font.glyphs[0].encoding; + + /* build byte array */ + for (int i = 0; i < dim(font.glyphs); i++) { + pos[font.glyphs[i].encoding] = dim(bytes); + for (int b = 0; b < dim(font.glyphs[i].bytes); b++) + bytes[dim(bytes)] = font.glyphs[i].bytes[b]; + } + + /* Fill in default glyph */ + for (int i = 0; i < dim(pos); i++) + if (pos[i] == -1) + pos[i] = pos[font.default_char]; + + printf("static const uint8_t glyph_bytes[%d] = {", dim(bytes)); + for (int b = 0; b < dim(bytes); b++) { + if ((b & 15) == 0) + printf("\n\t"); + printf("0x%02x, ", flip_byte(bytes[b])); + } + printf("\n};\n\n"); + + printf("static const uint16_t glyph_pos[%d] = {", dim(pos)); + for (int i = 0; i < dim(pos); i++) { + if ((i & 7) == 0) + printf("\n\t"); + printf("%4d, ", pos[i]); + } + printf("\n};\n\n"); + + printf("#define GLYPH_WIDTH %d\n", width); + printf("#define GLYPH_HEIGHT %d\n", height); + printf("#define GLYPH_ASCENT %d\n", font.ascent); +} + +twixt (file f = File::open(argv[1], "r"); File::close(f)) { + font_t font = read_font(f); + print_font(font); +} diff --git a/src/draw/line.5c b/src/draw/line.5c new file mode 100644 index 00000000..747768b0 --- /dev/null +++ b/src/draw/line.5c @@ -0,0 +1,389 @@ +#!/usr/bin/nickle + +autoimport Cairo; +autoload PRNG; + +int +sign(int x) +{ + return x == 0 ? 0 : x < 0 ? -1 : 1; +} + +int X_AXIS = 0; +int Y_AXIS = 1; + +typedef struct { + int major; + int minor; + int sign_major; + int sign_minor; + int e; + int e1; + int e3; + bool first; +} clip_context; + +typedef struct { + int maj1, min1, maj2, min2; +} clip_box; + +typedef struct { + int x1, y1, x2, y2; +} box; + +typedef struct { + int x, y; +} point; + +typedef struct { + int x1, y1, x2, y2; + box b; + point[] clipped; + point[] run; +} test; + +box bounds = { .x1 = 10, .x2 = 30, .y1 = 10, .y2 = 30 }; + +int +div_ceil(a, b) { + a += b; + assert(a >= 0 && b > 0, "bad divide args %d %d\n", a, b); + return (a + b - 1) // b - 1; +} + +int +div_floor_plus_one(a, b) { + a += b; + assert(a >= 0 && b > 0, "bad divide args %d %d\n", a, b); + return a // b; +} + +bool +clip(*clip_context c, *clip_box b) +{ + int adjust_major = 0, adjust_minor = 0; + + /* Clip major axis */ + if (c->major < b->maj1) { + if (c->sign_major <= 0) + return false; + adjust_major = b->maj1 - c->major; + } else if (c->major >= b->maj2) { + if (c->sign_major >= 0) + return false; + adjust_major = c->major - (b->maj2-1); + } + + /* Clip minor axis */ + if (c->minor < b->min1) { + if (c->sign_minor <= 0) + return false; + adjust_minor = b->min1 - c->minor; + } else if (c->minor >= b->min2) { + if (c->sign_minor >= 0) + return false; + adjust_minor = c->minor - (b->min2-1); + } + + /* If unclipped, we're done */ + if (adjust_major == 0 && adjust_minor == 0) + return true; + + /* See how much minor adjustment would happen during + * a major clip. This is a bit tricky because line drawing + * isn't symmetrical when the line passes exactly between + * two pixels, we have to pick which one gets drawn + */ + int adj_min; + + if (!c->first) + adj_min = div_ceil(c->e + adjust_major * c->e1, -c->e3); + else + adj_min = div_floor_plus_one(c->e + adjust_major * c->e1, -c->e3); + + /* Compare that to the minor clip and pick + * the larger amount. + */ + printf ("\tinitial major %d minor %d error %d e1 %d e3 %d\n", c->major, c->minor, c->e, c->e1, c->e3); + + if (adj_min < adjust_minor) { + printf("\tminor clip dominates %d < %d. adjust major %d -> ", + adj_min, adjust_minor, adjust_major); + if (c->first) + adjust_major = div_ceil(c->e - adjust_minor * c->e3, c->e1); + else + adjust_major = div_floor_plus_one(c->e - adjust_minor * c->e3, c->e1); + printf("%d\n", adjust_major); + } else { + printf("\tminor clip dominates %d > %d. adjust minor %d -> ", + adj_min, adjust_minor, adjust_minor); + adjust_minor = adj_min; + printf("%d\n", adjust_minor); + } + + c->e += adjust_major * c->e1 + adjust_minor * c->e3; + + c->major += c->sign_major * adjust_major; + c->minor += c->sign_minor * adjust_minor; + + printf ("\tadjust major %d adjust minor %d e %d e1 %d e3 %e\n", + adjust_major, adjust_minor, c->e, c->e1, c->e3); + + if (c->e >= 0) + printf ("error positive e %d e1 %d e3 %d\n", + c->e, c->e1, c->e3); + if (c->e < c->e3) + printf ("error magnitude too large e %d e1 %d e3 %d\n", c->e, c->e1, c->e3); + + return true; +} + +test +line(int x1, int y1, int x2, int y2, *box b) { + + int dx = x2 - x1; + int dy = y2 - y1; + int signdx = sign(dx); + int signdy = sign(dy); + int adx = abs(dx); + int ady = abs(dy); + int axis; + int e, e1, e2, e3; + int len; + clip_context clip_1, clip_2; + clip_box c; + bool clipped = false; + test t = { + .x1 = x1, + .y1 = y1, + .x2 = x2, + .y2 = y2, + .b = *b, + .clipped = (point[...]) {}, + .run = (point[...]) {} + }; + + if (adx >= ady) { + axis = X_AXIS; + e1 = ady << 1; + e2 = e1 - (adx << 1); + e = e1 - adx; + len = adx; + + clip_1.major = x1; + clip_1.minor = y1; + clip_2.major = x2; + clip_2.minor = y2; + clip_1.sign_major = signdx; + clip_1.sign_minor = signdy; + + c.maj1 = b->x1; + c.maj2 = b->x2; + c.min1 = b->y1; + c.min2 = b->y2; + } else { + axis = Y_AXIS; + e1 = adx << 1; + e2 = e1 - (ady << 1); + e = e1 - ady; + len = ady; + + clip_1.major = y1; + clip_1.minor = x1; + clip_2.major = y2; + clip_2.minor = x2; + clip_1.sign_major = signdy; + clip_1.sign_minor = signdx; + c.maj1 = b->y1; + c.maj2 = b->y2; + c.min1 = b->x1; + c.min2 = b->x2; + } + + e3 = e2 - e1; + e = e - e1; + + clip_1.first = true; + clip_2.first = false; + clip_2.e = clip_1.e = e; + clip_2.e1 = clip_1.e1 = e1; + clip_2.e3 = clip_1.e3 = e3; + clip_2.sign_major = -clip_1.sign_major; + clip_2.sign_minor = -clip_1.sign_minor; + + printf ("clip start:\n"); + if (!clip(&clip_1, &c)) + clipped = true; + + printf("clip end:\n"); + if (!clip(&clip_2, &c)) + clipped = true; + + int clip_len; + int clip_x, clip_y; + int clip_e; + int x_major, x_minor; + int y_major, y_minor; + + clip_len = clip_1.sign_major * (clip_2.major - clip_1.major); + if (clip_len < 0) + clipped = true; + + int x, y; + + if (axis == X_AXIS) { + x = clip_1.major; + y = clip_1.minor; + x_major = clip_1.sign_major; + x_minor = 0; + y_major = 0; + y_minor = clip_1.sign_minor; + } else { + x = clip_1.minor; + y = clip_1.major; + x_major = 0; + x_minor = clip_1.sign_minor; + y_major = clip_1.sign_major; + y_minor = 0; + } + + clip_e = clip_1.e; + + if (clipped) + clip_len = -1; + + while (clip_len-- >= 0) { + t.clipped[dim(t.clipped)] = (point) { .x = x, .y = y }; + x += x_major; + y += y_major; + clip_e += e1; + if (clip_e >= 0) { + x += x_minor; + y += y_minor; + clip_e += e3; + } + } + + x = x1; + y = y1; + + while (len-- >= 0) { + if (bounds.x1 <= x && x < bounds.x2 && + bounds.y1 <= y && y < bounds.y2) { + t.run[dim(t.run)] = (point) { .x = x, .y = y }; + } + x += x_major; + y += y_major; + e += e1; + if (e >= 0) { + x += x_minor; + y += y_minor; + e += e3; + } + } + return t; +} + +void read_events (Cairo::cairo_t cr) +{ + file event = Cairo::open_event(cr); + + while (!File::end(event)) { + string event_line = File::fgets(event); + if (String::index(event_line, "delete") >= 0) + exit(0); + } +} + +#for (int y = 0; y < 20; y++) + +void +show(cairo_t cr, test t) +{ + rectangle(cr, 0, 0, 40, 40); + set_source_rgba(cr, 1, 1, 1, 1); + fill(cr); + + set_source_rgba(cr, 0, 1, 0, .2); + set_line_width(cr, 0.1); + for (int x = 0; x < 40; x++) { + move_to(cr, 0, x); + line_to(cr, 40, x); + move_to(cr, x, 0); + line_to(cr, x, 40); + } + stroke(cr); + + rectangle(cr, t.b.x1, t.b.y1, t.b.x2 - t.b.x1, t.b.y2 - t.b.y1); + set_line_width(cr, 0.1); + set_source_rgba(cr, 0, 0, 0, 1); + stroke(cr); + + move_to(cr, t.x1+.5, t.y1+.5); + line_to(cr, t.x2+.5, t.y2+.5); + move_to(cr, t.x2, t.y2); + line_to(cr, t.x2+1, t.y2+1); + move_to(cr, t.x2+1, t.y2); + line_to(cr, t.x2, t.y2+1); + stroke(cr); + + void pixels(point[] pt) { + for (int i = 0; i < dim(pt); i++) { + rectangle(cr, pt[i].x, pt[i].y, 1, 1); + } + fill(cr); + } + + set_source_rgba(cr, 1, 0, 0, .5); + pixels(t.clipped); + + set_source_rgba(cr, 0, 0, 1, .5); + pixels(t.run); +} + +bool +compare(test t) +{ + if (dim(t.clipped) != dim(t.run)) + return false; + + for (int i = 0; i < dim(t.clipped); i++) + if (t.clipped[i] != t.run[i]) + return false; + return true; +} + +void +doit(int i) +{ + int n; + *box b = &bounds; + + cairo_t cr = new(800, 800); + + scale(cr, 20, 20); + + for (;;) { + PRNG::srandom(i); + int x1 = PRNG::randint(40); + int x2 = PRNG::randint(40); + int y1 = PRNG::randint(40); + int y2 = PRNG::randint(40); + + test t = line (x1, y1, x2, y2, &bounds); + show(cr, t); + if (!compare(t)) { + printf("line %d -- %d x %d - %d x %d\n", i, x1, y1, x2, y2); + gets(); + } + i++; + } + + read_events(cr); +} + +int i = 0; +if (dim(argv) > 1) + i = atoi(argv[1]); + +doit(i); |