sdl-ios-xcode: src/video/SDL

annotate src/video/SDL_draw.h @ 4814:4f7133445367

Added the header to the repo. Oops.

author	Eli Gottlieb <eligottlieb@gmail.com>
date	Thu, 29 Jul 2010 12:49:17 -0400
parents	f7b03b6838cb
children	e743b9c3f6d6

rev	line source
2898 e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	1 /*
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	2 SDL - Simple DirectMedia Layer
3697 f7b03b6838cb Fixed bug #926 Sam Lantinga <slouken@libsdl.org> parents: 3596 diff changeset	3 Copyright (C) 1997-2010 Sam Lantinga
2898 e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	4
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	5 This library is free software; you can redistribute it and/or
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	6 modify it under the terms of the GNU Lesser General Public
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	7 License as published by the Free Software Foundation; either
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	8 version 2.1 of the License, or (at your option) any later version.
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	9
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	10 This library is distributed in the hope that it will be useful,
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	11 but WITHOUT ANY WARRANTY; without even the implied warranty of
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	13 Lesser General Public License for more details.
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	14
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	15 You should have received a copy of the GNU Lesser General Public
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	16 License along with this library; if not, write to the Free Software
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	18
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	19 Sam Lantinga
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	20 slouken@libsdl.org
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	21 */
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	22 #include "SDL_config.h"
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	23
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	24 #include "SDL_blit.h"
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	25
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	26 /* This code assumes that r, g, b, a are the source color,
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	27 * and in the blend and add case, the RGB values are premultiplied by a.
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	28 */
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	29
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	30 #define DRAW_MUL(_a, _b) (((unsigned)(_a)*(_b))/255)
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	31
3596 f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	32 #define DRAW_FASTSETPIXEL(type) \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	33 *pixel = (type) color
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	34
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	35 #define DRAW_FASTSETPIXEL1 DRAW_FASTSETPIXEL(Uint8)
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	36 #define DRAW_FASTSETPIXEL2 DRAW_FASTSETPIXEL(Uint16)
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	37 #define DRAW_FASTSETPIXEL4 DRAW_FASTSETPIXEL(Uint32)
2901 133601e3b255 Added RenderPiont() API Sam Lantinga <slouken@libsdl.org> parents: 2900 diff changeset	38
3596 f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	39 #define DRAW_FASTSETPIXELXY(x, y, type, bpp, color) \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	40 (type )((Uint8 )dst->pixels + (y) dst->pitch \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	41 + (x) * bpp) = (type) color
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	42
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	43 #define DRAW_FASTSETPIXELXY1(x, y) DRAW_FASTSETPIXELXY(x, y, Uint8, 1, color)
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	44 #define DRAW_FASTSETPIXELXY2(x, y) DRAW_FASTSETPIXELXY(x, y, Uint16, 2, color)
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	45 #define DRAW_FASTSETPIXELXY4(x, y) DRAW_FASTSETPIXELXY(x, y, Uint32, 4, color)
2901 133601e3b255 Added RenderPiont() API Sam Lantinga <slouken@libsdl.org> parents: 2900 diff changeset	46
2898 e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	47 #define DRAW_SETPIXEL(setpixel) \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	48 do { \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	49 unsigned sr = r, sg = g, sb = b, sa = a; \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	50 setpixel; \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	51 } while (0)
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	52
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	53 #define DRAW_SETPIXEL_BLEND(getpixel, setpixel) \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	54 do { \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	55 unsigned sr, sg, sb, sa; sa; \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	56 getpixel; \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	57 sr = DRAW_MUL(inva, sr) + r; \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	58 sg = DRAW_MUL(inva, sg) + g; \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	59 sb = DRAW_MUL(inva, sb) + b; \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	60 setpixel; \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	61 } while (0)
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	62
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	63 #define DRAW_SETPIXEL_ADD(getpixel, setpixel) \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	64 do { \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	65 unsigned sr, sg, sb, sa; sa; \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	66 getpixel; \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	67 sr += r; if (sr > 0xff) sr = 0xff; \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	68 sg += g; if (sg > 0xff) sg = 0xff; \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	69 sb += b; if (sb > 0xff) sb = 0xff; \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	70 setpixel; \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	71 } while (0)
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	72
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	73 #define DRAW_SETPIXEL_MOD(getpixel, setpixel) \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	74 do { \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	75 unsigned sr, sg, sb, sa; sa; \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	76 getpixel; \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	77 sr = DRAW_MUL(sr, r); \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	78 sg = DRAW_MUL(sg, g); \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	79 sb = DRAW_MUL(sb, b); \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	80 setpixel; \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	81 } while (0)
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	82
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	83 #define DRAW_SETPIXELXY(x, y, type, bpp, op) \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	84 do { \
3596 f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	85 type pixel = (type )((Uint8 )dst->pixels + (y) dst->pitch \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	86 + (x) * bpp); \
2898 e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	87 op; \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	88 } while (0)
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	89
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	90 /*
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	91 * Define draw operators for RGB555
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	92 */
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	93
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	94 #define DRAW_SETPIXEL_RGB555 \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	95 DRAW_SETPIXEL(RGB555_FROM_RGB(*pixel, sr, sg, sb))
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	96
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	97 #define DRAW_SETPIXEL_BLEND_RGB555 \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	98 DRAW_SETPIXEL_BLEND(RGB_FROM_RGB555(*pixel, sr, sg, sb), \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	99 RGB555_FROM_RGB(*pixel, sr, sg, sb))
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	100
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	101 #define DRAW_SETPIXEL_ADD_RGB555 \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	102 DRAW_SETPIXEL_ADD(RGB_FROM_RGB555(*pixel, sr, sg, sb), \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	103 RGB555_FROM_RGB(*pixel, sr, sg, sb))
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	104
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	105 #define DRAW_SETPIXEL_MOD_RGB555 \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	106 DRAW_SETPIXEL_MOD(RGB_FROM_RGB555(*pixel, sr, sg, sb), \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	107 RGB555_FROM_RGB(*pixel, sr, sg, sb))
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	108
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	109 #define DRAW_SETPIXELXY_RGB555(x, y) \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	110 DRAW_SETPIXELXY(x, y, Uint16, 2, DRAW_SETPIXEL_RGB555)
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	111
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	112 #define DRAW_SETPIXELXY_BLEND_RGB555(x, y) \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	113 DRAW_SETPIXELXY(x, y, Uint16, 2, DRAW_SETPIXEL_BLEND_RGB555)
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	114
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	115 #define DRAW_SETPIXELXY_ADD_RGB555(x, y) \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	116 DRAW_SETPIXELXY(x, y, Uint16, 2, DRAW_SETPIXEL_ADD_RGB555)
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	117
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	118 #define DRAW_SETPIXELXY_MOD_RGB555(x, y) \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	119 DRAW_SETPIXELXY(x, y, Uint16, 2, DRAW_SETPIXEL_MOD_RGB555)
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	120
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	121 /*
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	122 * Define draw operators for RGB565
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	123 */
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	124
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	125 #define DRAW_SETPIXEL_RGB565 \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	126 DRAW_SETPIXEL(RGB565_FROM_RGB(*pixel, sr, sg, sb))
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	127
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	128 #define DRAW_SETPIXEL_BLEND_RGB565 \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	129 DRAW_SETPIXEL_BLEND(RGB_FROM_RGB565(*pixel, sr, sg, sb), \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	130 RGB565_FROM_RGB(*pixel, sr, sg, sb))
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	131
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	132 #define DRAW_SETPIXEL_ADD_RGB565 \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	133 DRAW_SETPIXEL_ADD(RGB_FROM_RGB565(*pixel, sr, sg, sb), \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	134 RGB565_FROM_RGB(*pixel, sr, sg, sb))
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	135
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	136 #define DRAW_SETPIXEL_MOD_RGB565 \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	137 DRAW_SETPIXEL_MOD(RGB_FROM_RGB565(*pixel, sr, sg, sb), \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	138 RGB565_FROM_RGB(*pixel, sr, sg, sb))
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	139
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	140 #define DRAW_SETPIXELXY_RGB565(x, y) \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	141 DRAW_SETPIXELXY(x, y, Uint16, 2, DRAW_SETPIXEL_RGB565)
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	142
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	143 #define DRAW_SETPIXELXY_BLEND_RGB565(x, y) \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	144 DRAW_SETPIXELXY(x, y, Uint16, 2, DRAW_SETPIXEL_BLEND_RGB565)
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	145
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	146 #define DRAW_SETPIXELXY_ADD_RGB565(x, y) \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	147 DRAW_SETPIXELXY(x, y, Uint16, 2, DRAW_SETPIXEL_ADD_RGB565)
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	148
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	149 #define DRAW_SETPIXELXY_MOD_RGB565(x, y) \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	150 DRAW_SETPIXELXY(x, y, Uint16, 2, DRAW_SETPIXEL_MOD_RGB565)
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	151
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	152 /*
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	153 * Define draw operators for RGB888
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	154 */
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	155
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	156 #define DRAW_SETPIXEL_RGB888 \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	157 DRAW_SETPIXEL(RGB888_FROM_RGB(*pixel, sr, sg, sb))
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	158
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	159 #define DRAW_SETPIXEL_BLEND_RGB888 \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	160 DRAW_SETPIXEL_BLEND(RGB_FROM_RGB888(*pixel, sr, sg, sb), \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	161 RGB888_FROM_RGB(*pixel, sr, sg, sb))
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	162
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	163 #define DRAW_SETPIXEL_ADD_RGB888 \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	164 DRAW_SETPIXEL_ADD(RGB_FROM_RGB888(*pixel, sr, sg, sb), \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	165 RGB888_FROM_RGB(*pixel, sr, sg, sb))
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	166
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	167 #define DRAW_SETPIXEL_MOD_RGB888 \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	168 DRAW_SETPIXEL_MOD(RGB_FROM_RGB888(*pixel, sr, sg, sb), \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	169 RGB888_FROM_RGB(*pixel, sr, sg, sb))
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	170
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	171 #define DRAW_SETPIXELXY_RGB888(x, y) \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	172 DRAW_SETPIXELXY(x, y, Uint32, 4, DRAW_SETPIXEL_RGB888)
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	173
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	174 #define DRAW_SETPIXELXY_BLEND_RGB888(x, y) \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	175 DRAW_SETPIXELXY(x, y, Uint32, 4, DRAW_SETPIXEL_BLEND_RGB888)
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	176
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	177 #define DRAW_SETPIXELXY_ADD_RGB888(x, y) \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	178 DRAW_SETPIXELXY(x, y, Uint32, 4, DRAW_SETPIXEL_ADD_RGB888)
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	179
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	180 #define DRAW_SETPIXELXY_MOD_RGB888(x, y) \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	181 DRAW_SETPIXELXY(x, y, Uint32, 4, DRAW_SETPIXEL_MOD_RGB888)
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	182
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	183 /*
2899 a0c837a16e4c Added ARGB optimized case for Mac OS X Sam Lantinga <slouken@libsdl.org> parents: 2898 diff changeset	184 * Define draw operators for ARGB8888
a0c837a16e4c Added ARGB optimized case for Mac OS X Sam Lantinga <slouken@libsdl.org> parents: 2898 diff changeset	185 */
a0c837a16e4c Added ARGB optimized case for Mac OS X Sam Lantinga <slouken@libsdl.org> parents: 2898 diff changeset	186
a0c837a16e4c Added ARGB optimized case for Mac OS X Sam Lantinga <slouken@libsdl.org> parents: 2898 diff changeset	187 #define DRAW_SETPIXEL_ARGB8888 \
a0c837a16e4c Added ARGB optimized case for Mac OS X Sam Lantinga <slouken@libsdl.org> parents: 2898 diff changeset	188 DRAW_SETPIXEL(ARGB8888_FROM_RGBA(*pixel, sr, sg, sb, sa))
a0c837a16e4c Added ARGB optimized case for Mac OS X Sam Lantinga <slouken@libsdl.org> parents: 2898 diff changeset	189
a0c837a16e4c Added ARGB optimized case for Mac OS X Sam Lantinga <slouken@libsdl.org> parents: 2898 diff changeset	190 #define DRAW_SETPIXEL_BLEND_ARGB8888 \
a0c837a16e4c Added ARGB optimized case for Mac OS X Sam Lantinga <slouken@libsdl.org> parents: 2898 diff changeset	191 DRAW_SETPIXEL_BLEND(RGBA_FROM_ARGB8888(*pixel, sr, sg, sb, sa), \
a0c837a16e4c Added ARGB optimized case for Mac OS X Sam Lantinga <slouken@libsdl.org> parents: 2898 diff changeset	192 ARGB8888_FROM_RGBA(*pixel, sr, sg, sb, sa))
a0c837a16e4c Added ARGB optimized case for Mac OS X Sam Lantinga <slouken@libsdl.org> parents: 2898 diff changeset	193
a0c837a16e4c Added ARGB optimized case for Mac OS X Sam Lantinga <slouken@libsdl.org> parents: 2898 diff changeset	194 #define DRAW_SETPIXEL_ADD_ARGB8888 \
a0c837a16e4c Added ARGB optimized case for Mac OS X Sam Lantinga <slouken@libsdl.org> parents: 2898 diff changeset	195 DRAW_SETPIXEL_ADD(RGBA_FROM_ARGB8888(*pixel, sr, sg, sb, sa), \
a0c837a16e4c Added ARGB optimized case for Mac OS X Sam Lantinga <slouken@libsdl.org> parents: 2898 diff changeset	196 ARGB8888_FROM_RGBA(*pixel, sr, sg, sb, sa))
a0c837a16e4c Added ARGB optimized case for Mac OS X Sam Lantinga <slouken@libsdl.org> parents: 2898 diff changeset	197
a0c837a16e4c Added ARGB optimized case for Mac OS X Sam Lantinga <slouken@libsdl.org> parents: 2898 diff changeset	198 #define DRAW_SETPIXEL_MOD_ARGB8888 \
a0c837a16e4c Added ARGB optimized case for Mac OS X Sam Lantinga <slouken@libsdl.org> parents: 2898 diff changeset	199 DRAW_SETPIXEL_MOD(RGBA_FROM_ARGB8888(*pixel, sr, sg, sb, sa), \
a0c837a16e4c Added ARGB optimized case for Mac OS X Sam Lantinga <slouken@libsdl.org> parents: 2898 diff changeset	200 ARGB8888_FROM_RGBA(*pixel, sr, sg, sb, sa))
a0c837a16e4c Added ARGB optimized case for Mac OS X Sam Lantinga <slouken@libsdl.org> parents: 2898 diff changeset	201
a0c837a16e4c Added ARGB optimized case for Mac OS X Sam Lantinga <slouken@libsdl.org> parents: 2898 diff changeset	202 #define DRAW_SETPIXELXY_ARGB8888(x, y) \
a0c837a16e4c Added ARGB optimized case for Mac OS X Sam Lantinga <slouken@libsdl.org> parents: 2898 diff changeset	203 DRAW_SETPIXELXY(x, y, Uint32, 4, DRAW_SETPIXEL_ARGB8888)
a0c837a16e4c Added ARGB optimized case for Mac OS X Sam Lantinga <slouken@libsdl.org> parents: 2898 diff changeset	204
a0c837a16e4c Added ARGB optimized case for Mac OS X Sam Lantinga <slouken@libsdl.org> parents: 2898 diff changeset	205 #define DRAW_SETPIXELXY_BLEND_ARGB8888(x, y) \
a0c837a16e4c Added ARGB optimized case for Mac OS X Sam Lantinga <slouken@libsdl.org> parents: 2898 diff changeset	206 DRAW_SETPIXELXY(x, y, Uint32, 4, DRAW_SETPIXEL_BLEND_ARGB8888)
a0c837a16e4c Added ARGB optimized case for Mac OS X Sam Lantinga <slouken@libsdl.org> parents: 2898 diff changeset	207
a0c837a16e4c Added ARGB optimized case for Mac OS X Sam Lantinga <slouken@libsdl.org> parents: 2898 diff changeset	208 #define DRAW_SETPIXELXY_ADD_ARGB8888(x, y) \
a0c837a16e4c Added ARGB optimized case for Mac OS X Sam Lantinga <slouken@libsdl.org> parents: 2898 diff changeset	209 DRAW_SETPIXELXY(x, y, Uint32, 4, DRAW_SETPIXEL_ADD_ARGB8888)
a0c837a16e4c Added ARGB optimized case for Mac OS X Sam Lantinga <slouken@libsdl.org> parents: 2898 diff changeset	210
a0c837a16e4c Added ARGB optimized case for Mac OS X Sam Lantinga <slouken@libsdl.org> parents: 2898 diff changeset	211 #define DRAW_SETPIXELXY_MOD_ARGB8888(x, y) \
a0c837a16e4c Added ARGB optimized case for Mac OS X Sam Lantinga <slouken@libsdl.org> parents: 2898 diff changeset	212 DRAW_SETPIXELXY(x, y, Uint32, 4, DRAW_SETPIXEL_MOD_ARGB8888)
a0c837a16e4c Added ARGB optimized case for Mac OS X Sam Lantinga <slouken@libsdl.org> parents: 2898 diff changeset	213
a0c837a16e4c Added ARGB optimized case for Mac OS X Sam Lantinga <slouken@libsdl.org> parents: 2898 diff changeset	214 /*
2898 e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	215 * Define draw operators for general RGB
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	216 */
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	217
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	218 #define DRAW_SETPIXEL_RGB \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	219 DRAW_SETPIXEL(PIXEL_FROM_RGB(*pixel, fmt, sr, sg, sb))
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	220
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	221 #define DRAW_SETPIXEL_BLEND_RGB \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	222 DRAW_SETPIXEL_BLEND(RGB_FROM_PIXEL(*pixel, fmt, sr, sg, sb), \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	223 PIXEL_FROM_RGB(*pixel, fmt, sr, sg, sb))
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	224
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	225 #define DRAW_SETPIXEL_ADD_RGB \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	226 DRAW_SETPIXEL_ADD(RGB_FROM_PIXEL(*pixel, fmt, sr, sg, sb), \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	227 PIXEL_FROM_RGB(*pixel, fmt, sr, sg, sb))
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	228
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	229 #define DRAW_SETPIXEL_MOD_RGB \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	230 DRAW_SETPIXEL_MOD(RGB_FROM_PIXEL(*pixel, fmt, sr, sg, sb), \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	231 PIXEL_FROM_RGB(*pixel, fmt, sr, sg, sb))
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	232
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	233 #define DRAW_SETPIXELXY2_RGB(x, y) \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	234 DRAW_SETPIXELXY(x, y, Uint16, 2, DRAW_SETPIXEL_RGB)
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	235
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	236 #define DRAW_SETPIXELXY4_RGB(x, y) \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	237 DRAW_SETPIXELXY(x, y, Uint32, 4, DRAW_SETPIXEL_RGB)
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	238
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	239 #define DRAW_SETPIXELXY2_BLEND_RGB(x, y) \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	240 DRAW_SETPIXELXY(x, y, Uint16, 2, DRAW_SETPIXEL_BLEND_RGB)
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	241
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	242 #define DRAW_SETPIXELXY4_BLEND_RGB(x, y) \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	243 DRAW_SETPIXELXY(x, y, Uint32, 4, DRAW_SETPIXEL_BLEND_RGB)
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	244
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	245 #define DRAW_SETPIXELXY2_ADD_RGB(x, y) \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	246 DRAW_SETPIXELXY(x, y, Uint16, 2, DRAW_SETPIXEL_ADD_RGB)
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	247
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	248 #define DRAW_SETPIXELXY4_ADD_RGB(x, y) \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	249 DRAW_SETPIXELXY(x, y, Uint32, 4, DRAW_SETPIXEL_ADD_RGB)
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	250
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	251 #define DRAW_SETPIXELXY2_MOD_RGB(x, y) \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	252 DRAW_SETPIXELXY(x, y, Uint16, 2, DRAW_SETPIXEL_MOD_RGB)
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	253
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	254 #define DRAW_SETPIXELXY4_MOD_RGB(x, y) \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	255 DRAW_SETPIXELXY(x, y, Uint32, 4, DRAW_SETPIXEL_MOD_RGB)
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	256
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	257
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	258 /*
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	259 * Define draw operators for general RGBA
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	260 */
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	261
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	262 #define DRAW_SETPIXEL_RGBA \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	263 DRAW_SETPIXEL(PIXEL_FROM_RGBA(*pixel, fmt, sr, sg, sb, sa))
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	264
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	265 #define DRAW_SETPIXEL_BLEND_RGBA \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	266 DRAW_SETPIXEL_BLEND(RGBA_FROM_PIXEL(*pixel, fmt, sr, sg, sb, sa), \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	267 PIXEL_FROM_RGBA(*pixel, fmt, sr, sg, sb, sa))
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	268
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	269 #define DRAW_SETPIXEL_ADD_RGBA \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	270 DRAW_SETPIXEL_ADD(RGBA_FROM_PIXEL(*pixel, fmt, sr, sg, sb, sa), \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	271 PIXEL_FROM_RGBA(*pixel, fmt, sr, sg, sb, sa))
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	272
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	273 #define DRAW_SETPIXEL_MOD_RGBA \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	274 DRAW_SETPIXEL_MOD(RGBA_FROM_PIXEL(*pixel, fmt, sr, sg, sb, sa), \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	275 PIXEL_FROM_RGBA(*pixel, fmt, sr, sg, sb, sa))
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	276
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	277 #define DRAW_SETPIXELXY4_RGBA(x, y) \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	278 DRAW_SETPIXELXY(x, y, Uint32, 4, DRAW_SETPIXEL_RGBA)
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	279
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	280 #define DRAW_SETPIXELXY4_BLEND_RGBA(x, y) \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	281 DRAW_SETPIXELXY(x, y, Uint32, 4, DRAW_SETPIXEL_BLEND_RGBA)
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	282
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	283 #define DRAW_SETPIXELXY4_ADD_RGBA(x, y) \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	284 DRAW_SETPIXELXY(x, y, Uint32, 4, DRAW_SETPIXEL_ADD_RGBA)
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	285
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	286 #define DRAW_SETPIXELXY4_MOD_RGBA(x, y) \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	287 DRAW_SETPIXELXY(x, y, Uint32, 4, DRAW_SETPIXEL_MOD_RGBA)
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	288
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	289 /*
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	290 * Define line drawing macro
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	291 */
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	292
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	293 #define ABS(_x) ((_x) < 0 ? -(_x) : (_x))
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	294
3596 f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	295 /* Horizontal line */
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	296 #define HLINE(type, op, draw_end) \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	297 { \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	298 int length; \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	299 int pitch = (dst->pitch / dst->format->BytesPerPixel); \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	300 type *pixel; \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	301 if (x1 <= x2) { \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	302 pixel = (type )dst->pixels + y1 pitch + x1; \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	303 length = draw_end ? (x2-x1+1) : (x2-x1); \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	304 } else { \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	305 pixel = (type )dst->pixels + y1 pitch + x2; \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	306 if (!draw_end) { \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	307 ++pixel; \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	308 } \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	309 length = draw_end ? (x1-x2+1) : (x1-x2); \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	310 } \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	311 while (length--) { \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	312 op; \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	313 ++pixel; \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	314 } \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	315 }
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	316
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	317 /* Vertical line */
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	318 #define VLINE(type, op, draw_end) \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	319 { \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	320 int length; \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	321 int pitch = (dst->pitch / dst->format->BytesPerPixel); \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	322 type *pixel; \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	323 if (y1 <= y2) { \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	324 pixel = (type )dst->pixels + y1 pitch + x1; \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	325 length = draw_end ? (y2-y1+1) : (y2-y1); \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	326 } else { \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	327 pixel = (type )dst->pixels + y2 pitch + x1; \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	328 if (!draw_end) { \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	329 pixel += pitch; \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	330 } \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	331 length = draw_end ? (y1-y2+1) : (y1-y2); \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	332 } \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	333 while (length--) { \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	334 op; \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	335 pixel += pitch; \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	336 } \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	337 }
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	338
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	339 /* Diagonal line */
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	340 #define DLINE(type, op, draw_end) \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	341 { \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	342 int length; \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	343 int pitch = (dst->pitch / dst->format->BytesPerPixel); \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	344 type *pixel; \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	345 if (y1 <= y2) { \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	346 pixel = (type )dst->pixels + y1 pitch + x1; \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	347 if (x1 <= x2) { \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	348 ++pitch; \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	349 } else { \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	350 --pitch; \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	351 } \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	352 length = (y2-y1); \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	353 } else { \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	354 pixel = (type )dst->pixels + y2 pitch + x2; \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	355 if (x2 <= x1) { \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	356 ++pitch; \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	357 } else { \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	358 --pitch; \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	359 } \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	360 if (!draw_end) { \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	361 pixel += pitch; \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	362 } \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	363 length = (y1-y2); \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	364 } \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	365 if (draw_end) { \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	366 ++length; \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	367 } \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	368 while (length--) { \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	369 op; \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	370 pixel += pitch; \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	371 } \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	372 }
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	373
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	374 /* Bresenham's line algorithm */
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	375 #define BLINE(x1, y1, x2, y2, op, draw_end) \
2898 e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	376 { \
2903 e426c4fc9cf7 Working Bresenham line drawing algorithm. We can optimize later, if needed. Sam Lantinga <slouken@libsdl.org> parents: 2901 diff changeset	377 int i, deltax, deltay, numpixels; \
e426c4fc9cf7 Working Bresenham line drawing algorithm. We can optimize later, if needed. Sam Lantinga <slouken@libsdl.org> parents: 2901 diff changeset	378 int d, dinc1, dinc2; \
e426c4fc9cf7 Working Bresenham line drawing algorithm. We can optimize later, if needed. Sam Lantinga <slouken@libsdl.org> parents: 2901 diff changeset	379 int x, xinc1, xinc2; \
e426c4fc9cf7 Working Bresenham line drawing algorithm. We can optimize later, if needed. Sam Lantinga <slouken@libsdl.org> parents: 2901 diff changeset	380 int y, yinc1, yinc2; \
e426c4fc9cf7 Working Bresenham line drawing algorithm. We can optimize later, if needed. Sam Lantinga <slouken@libsdl.org> parents: 2901 diff changeset	381 \
e426c4fc9cf7 Working Bresenham line drawing algorithm. We can optimize later, if needed. Sam Lantinga <slouken@libsdl.org> parents: 2901 diff changeset	382 deltax = ABS(x2 - x1); \
e426c4fc9cf7 Working Bresenham line drawing algorithm. We can optimize later, if needed. Sam Lantinga <slouken@libsdl.org> parents: 2901 diff changeset	383 deltay = ABS(y2 - y1); \
2898 e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	384 \
2903 e426c4fc9cf7 Working Bresenham line drawing algorithm. We can optimize later, if needed. Sam Lantinga <slouken@libsdl.org> parents: 2901 diff changeset	385 if (deltax >= deltay) { \
e426c4fc9cf7 Working Bresenham line drawing algorithm. We can optimize later, if needed. Sam Lantinga <slouken@libsdl.org> parents: 2901 diff changeset	386 numpixels = deltax + 1; \
e426c4fc9cf7 Working Bresenham line drawing algorithm. We can optimize later, if needed. Sam Lantinga <slouken@libsdl.org> parents: 2901 diff changeset	387 d = (2 * deltay) - deltax; \
e426c4fc9cf7 Working Bresenham line drawing algorithm. We can optimize later, if needed. Sam Lantinga <slouken@libsdl.org> parents: 2901 diff changeset	388 dinc1 = deltay * 2; \
e426c4fc9cf7 Working Bresenham line drawing algorithm. We can optimize later, if needed. Sam Lantinga <slouken@libsdl.org> parents: 2901 diff changeset	389 dinc2 = (deltay - deltax) * 2; \
e426c4fc9cf7 Working Bresenham line drawing algorithm. We can optimize later, if needed. Sam Lantinga <slouken@libsdl.org> parents: 2901 diff changeset	390 xinc1 = 1; \
e426c4fc9cf7 Working Bresenham line drawing algorithm. We can optimize later, if needed. Sam Lantinga <slouken@libsdl.org> parents: 2901 diff changeset	391 xinc2 = 1; \
e426c4fc9cf7 Working Bresenham line drawing algorithm. We can optimize later, if needed. Sam Lantinga <slouken@libsdl.org> parents: 2901 diff changeset	392 yinc1 = 0; \
e426c4fc9cf7 Working Bresenham line drawing algorithm. We can optimize later, if needed. Sam Lantinga <slouken@libsdl.org> parents: 2901 diff changeset	393 yinc2 = 1; \
2898 e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	394 } else { \
2903 e426c4fc9cf7 Working Bresenham line drawing algorithm. We can optimize later, if needed. Sam Lantinga <slouken@libsdl.org> parents: 2901 diff changeset	395 numpixels = deltay + 1; \
e426c4fc9cf7 Working Bresenham line drawing algorithm. We can optimize later, if needed. Sam Lantinga <slouken@libsdl.org> parents: 2901 diff changeset	396 d = (2 * deltax) - deltay; \
e426c4fc9cf7 Working Bresenham line drawing algorithm. We can optimize later, if needed. Sam Lantinga <slouken@libsdl.org> parents: 2901 diff changeset	397 dinc1 = deltax * 2; \
e426c4fc9cf7 Working Bresenham line drawing algorithm. We can optimize later, if needed. Sam Lantinga <slouken@libsdl.org> parents: 2901 diff changeset	398 dinc2 = (deltax - deltay) * 2; \
e426c4fc9cf7 Working Bresenham line drawing algorithm. We can optimize later, if needed. Sam Lantinga <slouken@libsdl.org> parents: 2901 diff changeset	399 xinc1 = 0; \
e426c4fc9cf7 Working Bresenham line drawing algorithm. We can optimize later, if needed. Sam Lantinga <slouken@libsdl.org> parents: 2901 diff changeset	400 xinc2 = 1; \
e426c4fc9cf7 Working Bresenham line drawing algorithm. We can optimize later, if needed. Sam Lantinga <slouken@libsdl.org> parents: 2901 diff changeset	401 yinc1 = 1; \
e426c4fc9cf7 Working Bresenham line drawing algorithm. We can optimize later, if needed. Sam Lantinga <slouken@libsdl.org> parents: 2901 diff changeset	402 yinc2 = 1; \
2898 e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	403 } \
2903 e426c4fc9cf7 Working Bresenham line drawing algorithm. We can optimize later, if needed. Sam Lantinga <slouken@libsdl.org> parents: 2901 diff changeset	404 \
e426c4fc9cf7 Working Bresenham line drawing algorithm. We can optimize later, if needed. Sam Lantinga <slouken@libsdl.org> parents: 2901 diff changeset	405 if (x1 > x2) { \
e426c4fc9cf7 Working Bresenham line drawing algorithm. We can optimize later, if needed. Sam Lantinga <slouken@libsdl.org> parents: 2901 diff changeset	406 xinc1 = -xinc1; \
e426c4fc9cf7 Working Bresenham line drawing algorithm. We can optimize later, if needed. Sam Lantinga <slouken@libsdl.org> parents: 2901 diff changeset	407 xinc2 = -xinc2; \
e426c4fc9cf7 Working Bresenham line drawing algorithm. We can optimize later, if needed. Sam Lantinga <slouken@libsdl.org> parents: 2901 diff changeset	408 } \
e426c4fc9cf7 Working Bresenham line drawing algorithm. We can optimize later, if needed. Sam Lantinga <slouken@libsdl.org> parents: 2901 diff changeset	409 if (y1 > y2) { \
e426c4fc9cf7 Working Bresenham line drawing algorithm. We can optimize later, if needed. Sam Lantinga <slouken@libsdl.org> parents: 2901 diff changeset	410 yinc1 = -yinc1; \
e426c4fc9cf7 Working Bresenham line drawing algorithm. We can optimize later, if needed. Sam Lantinga <slouken@libsdl.org> parents: 2901 diff changeset	411 yinc2 = -yinc2; \
2898 e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	412 } \
2903 e426c4fc9cf7 Working Bresenham line drawing algorithm. We can optimize later, if needed. Sam Lantinga <slouken@libsdl.org> parents: 2901 diff changeset	413 \
e426c4fc9cf7 Working Bresenham line drawing algorithm. We can optimize later, if needed. Sam Lantinga <slouken@libsdl.org> parents: 2901 diff changeset	414 x = x1; \
e426c4fc9cf7 Working Bresenham line drawing algorithm. We can optimize later, if needed. Sam Lantinga <slouken@libsdl.org> parents: 2901 diff changeset	415 y = y1; \
e426c4fc9cf7 Working Bresenham line drawing algorithm. We can optimize later, if needed. Sam Lantinga <slouken@libsdl.org> parents: 2901 diff changeset	416 \
3594 c8bed77b0386 Added SDL_DrawRect(), SDL_DrawRects(), SDL_BlendRect() and SDL_BlendRects() Sam Lantinga <slouken@libsdl.org> parents: 3593 diff changeset	417 if (!draw_end) { \
c8bed77b0386 Added SDL_DrawRect(), SDL_DrawRects(), SDL_BlendRect() and SDL_BlendRects() Sam Lantinga <slouken@libsdl.org> parents: 3593 diff changeset	418 --numpixels; \
c8bed77b0386 Added SDL_DrawRect(), SDL_DrawRects(), SDL_BlendRect() and SDL_BlendRects() Sam Lantinga <slouken@libsdl.org> parents: 3593 diff changeset	419 } \
3063 9f2482d6662c Fixed off by one error in line drawing code Sam Lantinga <slouken@libsdl.org> parents: 2918 diff changeset	420 for (i = 0; i < numpixels; ++i) { \
2903 e426c4fc9cf7 Working Bresenham line drawing algorithm. We can optimize later, if needed. Sam Lantinga <slouken@libsdl.org> parents: 2901 diff changeset	421 op(x, y); \
e426c4fc9cf7 Working Bresenham line drawing algorithm. We can optimize later, if needed. Sam Lantinga <slouken@libsdl.org> parents: 2901 diff changeset	422 if (d < 0) { \
e426c4fc9cf7 Working Bresenham line drawing algorithm. We can optimize later, if needed. Sam Lantinga <slouken@libsdl.org> parents: 2901 diff changeset	423 d += dinc1; \
e426c4fc9cf7 Working Bresenham line drawing algorithm. We can optimize later, if needed. Sam Lantinga <slouken@libsdl.org> parents: 2901 diff changeset	424 x += xinc1; \
e426c4fc9cf7 Working Bresenham line drawing algorithm. We can optimize later, if needed. Sam Lantinga <slouken@libsdl.org> parents: 2901 diff changeset	425 y += yinc1; \
e426c4fc9cf7 Working Bresenham line drawing algorithm. We can optimize later, if needed. Sam Lantinga <slouken@libsdl.org> parents: 2901 diff changeset	426 } else { \
e426c4fc9cf7 Working Bresenham line drawing algorithm. We can optimize later, if needed. Sam Lantinga <slouken@libsdl.org> parents: 2901 diff changeset	427 d += dinc2; \
e426c4fc9cf7 Working Bresenham line drawing algorithm. We can optimize later, if needed. Sam Lantinga <slouken@libsdl.org> parents: 2901 diff changeset	428 x += xinc2; \
e426c4fc9cf7 Working Bresenham line drawing algorithm. We can optimize later, if needed. Sam Lantinga <slouken@libsdl.org> parents: 2901 diff changeset	429 y += yinc2; \
2898 e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	430 } \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	431 } \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	432 }
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	433
3596 f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	434 /* Xiaolin Wu's line algorithm, based on Michael Abrash's implementation */
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	435 #define WULINE(x1, y1, x2, y2, opaque_op, blend_op, draw_end) \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	436 { \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	437 Uint16 ErrorAdj, ErrorAcc; \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	438 Uint16 ErrorAccTemp, Weighting; \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	439 int DeltaX, DeltaY, Temp, XDir; \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	440 unsigned r, g, b, a, inva; \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	441 \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	442 /* Draw the initial pixel, which is always exactly intersected by \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	443 the line and so needs no weighting */ \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	444 opaque_op(x1, y1); \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	445 \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	446 /* Draw the final pixel, which is always exactly intersected by the line \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	447 and so needs no weighting */ \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	448 if (draw_end) { \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	449 opaque_op(x2, y2); \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	450 } \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	451 \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	452 /* Make sure the line runs top to bottom */ \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	453 if (y1 > y2) { \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	454 Temp = y1; y1 = y2; y2 = Temp; \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	455 Temp = x1; x1 = x2; x2 = Temp; \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	456 } \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	457 DeltaY = y2 - y1; \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	458 \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	459 if ((DeltaX = x2 - x1) >= 0) { \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	460 XDir = 1; \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	461 } else { \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	462 XDir = -1; \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	463 DeltaX = -DeltaX; /* make DeltaX positive */ \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	464 } \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	465 \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	466 /* line is not horizontal, diagonal, or vertical */ \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	467 ErrorAcc = 0; /* initialize the line error accumulator to 0 */ \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	468 \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	469 /* Is this an X-major or Y-major line? */ \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	470 if (DeltaY > DeltaX) { \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	471 /* Y-major line; calculate 16-bit fixed-point fractional part of a \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	472 pixel that X advances each time Y advances 1 pixel, truncating the \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	473 result so that we won't overrun the endpoint along the X axis */ \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	474 ErrorAdj = ((unsigned long) DeltaX << 16) / (unsigned long) DeltaY; \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	475 /* Draw all pixels other than the first and last */ \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	476 while (--DeltaY) { \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	477 ErrorAccTemp = ErrorAcc; /* remember currrent accumulated error */ \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	478 ErrorAcc += ErrorAdj; /* calculate error for next pixel */ \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	479 if (ErrorAcc <= ErrorAccTemp) { \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	480 /* The error accumulator turned over, so advance the X coord */ \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	481 x1 += XDir; \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	482 } \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	483 y1++; /* Y-major, so always advance Y */ \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	484 /* The IntensityBits most significant bits of ErrorAcc give us the \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	485 intensity weighting for this pixel, and the complement of the \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	486 weighting for the paired pixel */ \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	487 Weighting = ErrorAcc >> 8; \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	488 { \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	489 a = DRAW_MUL(_a, (Weighting ^ 255)); \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	490 r = DRAW_MUL(_r, a); \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	491 g = DRAW_MUL(_g, a); \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	492 b = DRAW_MUL(_b, a); \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	493 inva = (a ^ 0xFF); \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	494 blend_op(x1, y1); \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	495 } \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	496 { \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	497 a = DRAW_MUL(_a, Weighting); \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	498 r = DRAW_MUL(_r, a); \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	499 g = DRAW_MUL(_g, a); \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	500 b = DRAW_MUL(_b, a); \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	501 inva = (a ^ 0xFF); \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	502 blend_op(x1 + XDir, y1); \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	503 } \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	504 } \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	505 } else { \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	506 /* X-major line; calculate 16-bit fixed-point fractional part of a \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	507 pixel that Y advances each time X advances 1 pixel, truncating the \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	508 result to avoid overrunning the endpoint along the X axis */ \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	509 ErrorAdj = ((unsigned long) DeltaY << 16) / (unsigned long) DeltaX; \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	510 /* Draw all pixels other than the first and last */ \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	511 while (--DeltaX) { \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	512 ErrorAccTemp = ErrorAcc; /* remember currrent accumulated error */ \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	513 ErrorAcc += ErrorAdj; /* calculate error for next pixel */ \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	514 if (ErrorAcc <= ErrorAccTemp) { \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	515 /* The error accumulator turned over, so advance the Y coord */ \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	516 y1++; \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	517 } \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	518 x1 += XDir; /* X-major, so always advance X */ \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	519 /* The IntensityBits most significant bits of ErrorAcc give us the \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	520 intensity weighting for this pixel, and the complement of the \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	521 weighting for the paired pixel */ \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	522 Weighting = ErrorAcc >> 8; \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	523 { \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	524 a = DRAW_MUL(_a, (Weighting ^ 255)); \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	525 r = DRAW_MUL(_r, a); \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	526 g = DRAW_MUL(_g, a); \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	527 b = DRAW_MUL(_b, a); \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	528 inva = (a ^ 0xFF); \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	529 blend_op(x1, y1); \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	530 } \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	531 { \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	532 a = DRAW_MUL(_a, Weighting); \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	533 r = DRAW_MUL(_r, a); \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	534 g = DRAW_MUL(_g, a); \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	535 b = DRAW_MUL(_b, a); \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	536 inva = (a ^ 0xFF); \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	537 blend_op(x1, y1 + 1); \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	538 } \
3593 b931bcfd94a0 In the process of adding rectangle drawing Sam Lantinga <slouken@libsdl.org> parents: 3536 diff changeset	539 } \
b931bcfd94a0 In the process of adding rectangle drawing Sam Lantinga <slouken@libsdl.org> parents: 3536 diff changeset	540 } \
3596 f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	541 }
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	542
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	543 #ifdef AA_LINES
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	544 #define AALINE(x1, y1, x2, y2, opaque_op, blend_op, draw_end) \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	545 WULINE(x1, y1, x2, y2, opaque_op, blend_op, draw_end)
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	546 #else
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	547 #define AALINE(x1, y1, x2, y2, opaque_op, blend_op, draw_end) \
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	548 BLINE(x1, y1, x2, y2, opaque_op, draw_end)
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color. Sam Lantinga <slouken@libsdl.org> parents: 3594 diff changeset	549 #endif
3593 b931bcfd94a0 In the process of adding rectangle drawing Sam Lantinga <slouken@libsdl.org> parents: 3536 diff changeset	550
b931bcfd94a0 In the process of adding rectangle drawing Sam Lantinga <slouken@libsdl.org> parents: 3536 diff changeset	551 /*
b931bcfd94a0 In the process of adding rectangle drawing Sam Lantinga <slouken@libsdl.org> parents: 3536 diff changeset	552 * Define fill rect macro
2898 e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	553 */
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	554
2900 3a9636c83849 Make it possible to switch algorithms in the future Sam Lantinga <slouken@libsdl.org> parents: 2899 diff changeset	555 #define FILLRECT(type, op) \
2898 e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	556 do { \
3536 0267b8b1595c Added interfaces for batch drawing of points, lines and rects: Sam Lantinga <slouken@libsdl.org> parents: 3063 diff changeset	557 int width = rect->w; \
0267b8b1595c Added interfaces for batch drawing of points, lines and rects: Sam Lantinga <slouken@libsdl.org> parents: 3063 diff changeset	558 int height = rect->h; \
2898 e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	559 int pitch = (dst->pitch / dst->format->BytesPerPixel); \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	560 int skip = pitch - width; \
3536 0267b8b1595c Added interfaces for batch drawing of points, lines and rects: Sam Lantinga <slouken@libsdl.org> parents: 3063 diff changeset	561 type pixel = (type )dst->pixels + rect->y * pitch + rect->x; \
2898 e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	562 while (height--) { \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	563 { int n = (width+3)/4; \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	564 switch (width & 3) { \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	565 case 0: do { op; pixel++; \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	566 case 3: op; pixel++; \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	567 case 2: op; pixel++; \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	568 case 1: op; pixel++; \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	569 } while ( --n > 0 ); \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	570 } \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	571 } \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	572 pixel += skip; \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	573 } \
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	574 } while (0)
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	575
e40448bc7727 Share code between fill and line drawing Sam Lantinga <slouken@libsdl.org> parents: diff changeset	576 /* vi: set ts=4 sw=4 expandtab: */

Mercurial > sdl-ios-xcode

annotate src/video/SDL_draw.h @ 4814:4f7133445367