Mercurial > sdl-ios-xcode

annotate src/video/SDL_blendline.c @ 2898:e40448bc7727

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Share code between fill and line drawing Added general RGB surface format fallbacks to drawing code Fixed issues with destination surface alpha channel
author Sam Lantinga <slouken@libsdl.org>
date Sun, 21 Dec 2008 08:28:25 +0000
parents 1ef2f1e75ff7
children a0c837a16e4c
rev   line source
2888
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
1 /*
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
2 SDL - Simple DirectMedia Layer
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
3 Copyright (C) 1997-2009 Sam Lantinga
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
4
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
5 This library is free software; you can redistribute it and/or
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
6 modify it under the terms of the GNU Lesser General Public
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
7 License as published by the Free Software Foundation; either
32e8bbba1e94 Added stubs for software implementations of blending fills 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.
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
9
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
10 This library is distributed in the hope that it will be useful,
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
13 Lesser General Public License for more details.
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
14
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
15 You should have received a copy of the GNU Lesser General Public
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
16 License along with this library; if not, write to the Free Software
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
18
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
19 Sam Lantinga
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
20 slouken@libsdl.org
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
21 */
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
22 #include "SDL_config.h"
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
23
2898
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
24 #include "SDL_draw.h"
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
25
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
26 static int
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
27 SDL_BlendLine_RGB555(SDL_Surface * dst, int x1, int y1, int x2, int y2,
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
28 int blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a)
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
29 {
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
30 unsigned inva = 0xff - a;
2888
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
31
2898
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
32 switch (blendMode) {
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
33 case SDL_BLENDMODE_BLEND:
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
34 BRESENHAM(x1, y1, x2, y2, DRAW_SETPIXELXY_BLEND_RGB555);
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
35 break;
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
36 case SDL_BLENDMODE_ADD:
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
37 BRESENHAM(x1, y1, x2, y2, DRAW_SETPIXELXY_ADD_RGB555);
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
38 break;
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
39 case SDL_BLENDMODE_MOD:
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
40 BRESENHAM(x1, y1, x2, y2, DRAW_SETPIXELXY_MOD_RGB555);
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
41 break;
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
42 default:
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
43 BRESENHAM(x1, y1, x2, y2, DRAW_SETPIXELXY_RGB555);
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
44 break;
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
45 }
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
46 return 0;
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
47 }
2896
1ef2f1e75ff7 Date: Sat, 20 Dec 2008 23:25:19 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 2888
diff changeset
48
2898
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
49 static int
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
50 SDL_BlendLine_RGB565(SDL_Surface * dst, int x1, int y1, int x2, int y2,
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
51 int blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a)
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
52 {
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
53 unsigned inva = 0xff - a;
2896
1ef2f1e75ff7 Date: Sat, 20 Dec 2008 23:25:19 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 2888
diff changeset
54
2898
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
55 switch (blendMode) {
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
56 case SDL_BLENDMODE_BLEND:
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
57 BRESENHAM(x1, y1, x2, y2, DRAW_SETPIXELXY_BLEND_RGB565);
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
58 break;
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
59 case SDL_BLENDMODE_ADD:
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
60 BRESENHAM(x1, y1, x2, y2, DRAW_SETPIXELXY_ADD_RGB565);
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
61 break;
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
62 case SDL_BLENDMODE_MOD:
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
63 BRESENHAM(x1, y1, x2, y2, DRAW_SETPIXELXY_MOD_RGB565);
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
64 break;
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
65 default:
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
66 BRESENHAM(x1, y1, x2, y2, DRAW_SETPIXELXY_RGB565);
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
67 break;
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
68 }
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
69 return 0;
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
70 }
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
71
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
72 static int
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
73 SDL_BlendLine_RGB888(SDL_Surface * dst, int x1, int y1, int x2, int y2,
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
74 int blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a)
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
75 {
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
76 unsigned inva = 0xff - a;
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
77
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
78 switch (blendMode) {
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
79 case SDL_BLENDMODE_BLEND:
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
80 BRESENHAM(x1, y1, x2, y2, DRAW_SETPIXELXY_BLEND_RGB888);
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
81 break;
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
82 case SDL_BLENDMODE_ADD:
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
83 BRESENHAM(x1, y1, x2, y2, DRAW_SETPIXELXY_ADD_RGB888);
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
84 break;
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
85 case SDL_BLENDMODE_MOD:
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
86 BRESENHAM(x1, y1, x2, y2, DRAW_SETPIXELXY_MOD_RGB888);
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
87 break;
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
88 default:
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
89 BRESENHAM(x1, y1, x2, y2, DRAW_SETPIXELXY_RGB888);
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
90 break;
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
91 }
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
92 return 0;
2896
1ef2f1e75ff7 Date: Sat, 20 Dec 2008 23:25:19 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 2888
diff changeset
93 }
1ef2f1e75ff7 Date: Sat, 20 Dec 2008 23:25:19 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 2888
diff changeset
94
2898
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
95 static int
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
96 SDL_BlendLine_RGB(SDL_Surface * dst, int x1, int y1, int x2, int y2,
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
97 int blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a)
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
98 {
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
99 SDL_PixelFormat *fmt = dst->format;
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
100 unsigned inva = 0xff - a;
2896
1ef2f1e75ff7 Date: Sat, 20 Dec 2008 23:25:19 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 2888
diff changeset
101
2898
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
102 switch (fmt->BytesPerPixel) {
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
103 case 2:
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
104 switch (blendMode) {
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
105 case SDL_BLENDMODE_BLEND:
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
106 BRESENHAM(x1, y1, x2, y2, DRAW_SETPIXELXY2_BLEND_RGB);
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
107 break;
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
108 case SDL_BLENDMODE_ADD:
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
109 BRESENHAM(x1, y1, x2, y2, DRAW_SETPIXELXY2_ADD_RGB);
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
110 break;
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
111 case SDL_BLENDMODE_MOD:
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
112 BRESENHAM(x1, y1, x2, y2, DRAW_SETPIXELXY2_MOD_RGB);
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
113 break;
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
114 default:
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
115 BRESENHAM(x1, y1, x2, y2, DRAW_SETPIXELXY2_RGB);
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
116 break;
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
117 }
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
118 return 0;
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
119 case 4:
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
120 switch (blendMode) {
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
121 case SDL_BLENDMODE_BLEND:
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
122 BRESENHAM(x1, y1, x2, y2, DRAW_SETPIXELXY4_BLEND_RGB);
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
123 break;
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
124 case SDL_BLENDMODE_ADD:
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
125 BRESENHAM(x1, y1, x2, y2, DRAW_SETPIXELXY4_ADD_RGB);
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
126 break;
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
127 case SDL_BLENDMODE_MOD:
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
128 BRESENHAM(x1, y1, x2, y2, DRAW_SETPIXELXY4_MOD_RGB);
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
129 break;
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
130 default:
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
131 BRESENHAM(x1, y1, x2, y2, DRAW_SETPIXELXY4_RGB);
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
132 break;
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
133 }
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
134 return 0;
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
135 default:
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
136 SDL_Unsupported();
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
137 return -1;
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
138 }
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
139 }
2896
1ef2f1e75ff7 Date: Sat, 20 Dec 2008 23:25:19 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 2888
diff changeset
140
2898
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
141 static int
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
142 SDL_BlendLine_RGBA(SDL_Surface * dst, int x1, int y1, int x2, int y2,
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
143 int blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a)
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
144 {
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
145 SDL_PixelFormat *fmt = dst->format;
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
146 unsigned inva = 0xff - a;
2896
1ef2f1e75ff7 Date: Sat, 20 Dec 2008 23:25:19 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 2888
diff changeset
147
2898
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
148 switch (fmt->BytesPerPixel) {
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
149 case 4:
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
150 switch (blendMode) {
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
151 case SDL_BLENDMODE_BLEND:
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
152 BRESENHAM(x1, y1, x2, y2, DRAW_SETPIXELXY4_BLEND_RGBA);
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
153 break;
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
154 case SDL_BLENDMODE_ADD:
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
155 BRESENHAM(x1, y1, x2, y2, DRAW_SETPIXELXY4_ADD_RGBA);
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
156 break;
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
157 case SDL_BLENDMODE_MOD:
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
158 BRESENHAM(x1, y1, x2, y2, DRAW_SETPIXELXY4_MOD_RGBA);
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
159 break;
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
160 default:
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
161 BRESENHAM(x1, y1, x2, y2, DRAW_SETPIXELXY4_RGBA);
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
162 break;
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
163 }
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
164 return 0;
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
165 default:
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
166 SDL_Unsupported();
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
167 return -1;
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
168 }
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
169 }
2888
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
170
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
171 int
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
172 SDL_BlendLine(SDL_Surface * dst, int x1, int y1, int x2, int y2,
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
173 int blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a)
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
174 {
2898
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
175 SDL_PixelFormat *fmt = dst->format;
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
176
2888
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
177 /* This function doesn't work on surfaces < 8 bpp */
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
178 if (dst->format->BitsPerPixel < 8) {
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
179 SDL_SetError("SDL_BlendLine(): Unsupported surface format");
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
180 return (-1);
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
181 }
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
182
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
183 /* Perform clipping */
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
184 /* FIXME
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
185 if (!SDL_IntersectRect(dstrect, &dst->clip_rect, dstrect)) {
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
186 return (0);
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
187 }
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
188 */
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
189
2896
1ef2f1e75ff7 Date: Sat, 20 Dec 2008 23:25:19 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 2888
diff changeset
190 if ((blendMode == SDL_BLENDMODE_BLEND)
1ef2f1e75ff7 Date: Sat, 20 Dec 2008 23:25:19 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 2888
diff changeset
191 || (blendMode == SDL_BLENDMODE_ADD)) {
2898
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
192 r = DRAW_MUL(r, a);
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
193 g = DRAW_MUL(g, a);
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
194 b = DRAW_MUL(b, a);
2896
1ef2f1e75ff7 Date: Sat, 20 Dec 2008 23:25:19 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 2888
diff changeset
195 }
2898
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
196
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
197 switch (fmt->BitsPerPixel) {
2896
1ef2f1e75ff7 Date: Sat, 20 Dec 2008 23:25:19 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 2888
diff changeset
198 case 15:
2898
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
199 switch (fmt->Rmask) {
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
200 case 0x7C00:
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
201 return SDL_BlendLine_RGB555(dst, x1, y1, x2, y2, blendMode, r, g,
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
202 b, a);
2896
1ef2f1e75ff7 Date: Sat, 20 Dec 2008 23:25:19 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 2888
diff changeset
203 }
1ef2f1e75ff7 Date: Sat, 20 Dec 2008 23:25:19 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 2888
diff changeset
204 break;
1ef2f1e75ff7 Date: Sat, 20 Dec 2008 23:25:19 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 2888
diff changeset
205 case 16:
2898
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
206 switch (fmt->Rmask) {
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
207 case 0xF800:
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
208 return SDL_BlendLine_RGB565(dst, x1, y1, x2, y2, blendMode, r, g,
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
209 b, a);
2896
1ef2f1e75ff7 Date: Sat, 20 Dec 2008 23:25:19 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 2888
diff changeset
210 }
1ef2f1e75ff7 Date: Sat, 20 Dec 2008 23:25:19 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 2888
diff changeset
211 break;
1ef2f1e75ff7 Date: Sat, 20 Dec 2008 23:25:19 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 2888
diff changeset
212 case 32:
2898
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
213 switch (fmt->Rmask) {
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
214 case 0x00FF0000:
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
215 if (!fmt->Amask) {
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
216 return SDL_BlendLine_RGB888(dst, x1, y1, x2, y2, blendMode, r,
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
217 g, b, a);
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
218 }
2896
1ef2f1e75ff7 Date: Sat, 20 Dec 2008 23:25:19 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 2888
diff changeset
219 break;
1ef2f1e75ff7 Date: Sat, 20 Dec 2008 23:25:19 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 2888
diff changeset
220 }
2898
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
221 default:
2896
1ef2f1e75ff7 Date: Sat, 20 Dec 2008 23:25:19 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 2888
diff changeset
222 break;
1ef2f1e75ff7 Date: Sat, 20 Dec 2008 23:25:19 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 2888
diff changeset
223 }
2898
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
224
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
225 if (!fmt->Amask) {
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
226 return SDL_BlendLine_RGB(dst, x1, y1, x2, y2, blendMode, r, g, b, a);
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
227 } else {
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
228 return SDL_BlendLine_RGBA(dst, x1, y1, x2, y2, blendMode, r, g, b, a);
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2896
diff changeset
229 }
2888
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
230 }
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
231
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
232 /* vi: set ts=4 sw=4 expandtab: */