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annotate src/video/SDL_blendline.c @ 2896:1ef2f1e75ff7

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Date: Sat, 20 Dec 2008 23:25:19 +0100 From: Couriersud Subject: 32 & 16 bit versions of blendrect and blendline attached are 32, 16 and 15 bit versions of the blendrect and blendline functionality. There was an issue with the bresenham alg. in drawline which I also fixed.
author Sam Lantinga <slouken@libsdl.org>
date Sat, 20 Dec 2008 23:19:20 +0000
parents 32e8bbba1e94
children e40448bc7727
rev   line source
2888
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2009 Sam Lantinga
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4
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
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5 This library is free software; you can redistribute it and/or
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
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6 modify it under the terms of the GNU Lesser General Public
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
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7 License as published by the Free Software Foundation; either
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
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8 version 2.1 of the License, or (at your option) any later version.
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9
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
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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
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
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13 Lesser General Public License for more details.
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
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14
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
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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
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16 License along with this library; if not, write to the Free Software
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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18
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19 Sam Lantinga
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20 slouken@libsdl.org
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21 */
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22 #include "SDL_config.h"
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23
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24 #include "SDL_video.h"
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25 #include "SDL_blit.h"
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26
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27 #define ABS(_x) ((_x) < 0 ? -(_x) : (_x))
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28
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29 #define SWAP(_x, _y) do { int tmp; tmp = _x; _x = _y; _y = tmp; } while (0)
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30
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31 #define BRESENHAM(x0, y0, x1, y1, op) \
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32 { \
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33 int deltax, deltay, steep, error, xstep, ystep, x, y; \
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34 \
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35 deltax = ABS(x1 - x0); \
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36 deltay = ABS(y1 - y0); \
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37 steep = (deltay > deltax); \
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38 if (steep) { \
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39 SWAP(x0, y0); \
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40 SWAP(x1, y1); \
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41 SWAP(deltax, deltay); \
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42 } \
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43 error = (x1 - x0) / 2; \
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44 y = y0; \
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45 if (x0 > x1) { \
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46 xstep = -1; \
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47 } else { \
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48 xstep = 1; \
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49 } \
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50 if (y0 < y1) { \
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51 ystep = 1; \
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52 } else { \
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53 ystep = -1; \
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54 } \
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55 if (!steep) { \
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56 for (x = x0; x != x1; x += xstep) { \
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57 op(x, y); \
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58 error -= deltay; \
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59 if (error < 0) { \
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60 y += ystep; \
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61 error += deltax; \
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62 } \
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63 } \
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64 } else { \
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65 for (x = x0; x != x1; x += xstep) { \
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66 op(y, x); \
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67 error -= deltay; \
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68 if (error < 0) { \
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69 y += ystep; \
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70 error += deltax; \
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71 } \
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72 } \
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73 } \
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74 }
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75
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76 #define MUL(_a, _b) (((Uint16)(_a)*(Uint16)(_b))/255)
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77 #define SHIFTAND(_v, _s, _a) (((_v)>>(_s)) & _a)
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78
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79 #define SETPIXEL_MASK(x, y, type, bpp, rshift, gshift, bshift, rmask, gmask, bmask) \
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80 do { \
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81 type *pixel = (type *)(dst->pixels + y * dst->pitch + x * bpp); \
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82 if (a) { \
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83 *pixel = (r<<rshift) | (g<<gshift) | (b<<bshift); \
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84 } \
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85 } while (0)
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86
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87 #define SETPIXEL_BLEND(x, y, type, bpp, rshift, gshift, bshift, rmask, gmask, bmask) \
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88 do { \
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89 type *pixel = (type *)(dst->pixels + y * dst->pitch + x * bpp); \
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90 Uint8 sr = MUL(inva, SHIFTAND(*pixel, rshift, rmask)) + (Uint16) r; \
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91 Uint8 sg = MUL(inva, SHIFTAND(*pixel, gshift, gmask)) + (Uint16) g; \
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92 Uint8 sb = MUL(inva, SHIFTAND(*pixel, bshift, bmask)) + (Uint16) b; \
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93 *pixel = (sr<<rshift) | (sg<<gshift) | (sb<<bshift); \
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94 } while (0)
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95
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96 #define SETPIXEL_ADD(x, y, type, bpp, rshift, gshift, bshift, rmask, gmask, bmask) \
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97 do { \
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98 type *pixel = (type *)(dst->pixels + y * dst->pitch + x * bpp); \
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99 Uint16 sr = SHIFTAND(*pixel, rshift, rmask) + (Uint16) r; \
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100 Uint16 sg = SHIFTAND(*pixel, gshift, gmask) + (Uint16) g; \
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101 Uint16 sb = SHIFTAND(*pixel, bshift, bmask) + (Uint16) b; \
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102 if (sr>rmask) sr = rmask; \
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103 if (sg>gmask) sg = gmask; \
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104 if (sb>bmask) sb = bmask; \
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105 *pixel = (sr<<rshift) | (sg<<gshift) | (sb<<bshift); \
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106 } while (0)
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107
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108 #define SETPIXEL_MOD(x, y, type, bpp, rshift, gshift, bshift, rmask, gmask, bmask) \
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109 do { \
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110 type *pixel = (type *)(dst->pixels + y * dst->pitch + x * bpp); \
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111 Uint8 sr = MUL(SHIFTAND(*pixel, rshift, rmask), r); \
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112 Uint8 sg = MUL(SHIFTAND(*pixel, gshift, gmask), g); \
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113 Uint8 sb = MUL(SHIFTAND(*pixel, bshift, bmask), b); \
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114 *pixel = (sr<<rshift) | (sg<<gshift) | (sb<<bshift); \
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115 } while (0)
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116
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117
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118 #define SETPIXEL15_MASK(x, y) SETPIXEL_MASK(x, y, Uint16, 2, 10, 5, 0, 0x1f, 0x1f, 0x1f);
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119 #define SETPIXEL15_BLEND(x, y) SETPIXEL_BLEND(x, y, Uint16, 2, 10, 5, 0, 0x1f, 0x1f, 0x1f);
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120 #define SETPIXEL15_ADD(x, y) SETPIXEL_ADD(x, y, Uint16, 2, 10, 5, 0, 0x1f, 0x1f, 0x1f);
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121 #define SETPIXEL15_MOD(x, y) SETPIXEL_MOD(x, y, Uint16, 2, 10, 5, 0, 0x1f, 0x1f, 0x1f);
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Sam Lantinga <slouken@libsdl.org>
parents: 2888
diff changeset
122
1ef2f1e75ff7 Date: Sat, 20 Dec 2008 23:25:19 +0100
Sam Lantinga <slouken@libsdl.org>
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diff changeset
123 #define SETPIXEL16_MASK(x, y) SETPIXEL_MASK(x, y, Uint16, 2, 11, 5, 0, 0x1f, 0x3f, 0x1f);
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Sam Lantinga <slouken@libsdl.org>
parents: 2888
diff changeset
124 #define SETPIXEL16_BLEND(x, y) SETPIXEL_BLEND(x, y, Uint16, 2, 11, 5, 0, 0x1f, 0x3f, 0x1f);
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125 #define SETPIXEL16_ADD(x, y) SETPIXEL_ADD(x, y, Uint16, 2, 11, 5, 0, 0x1f, 0x3f, 0x1f);
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diff changeset
126 #define SETPIXEL16_MOD(x, y) SETPIXEL_MOD(x, y, Uint16, 2, 11, 5, 0, 0x1f, 0x3f, 0x1f);
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parents: 2888
diff changeset
127
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Sam Lantinga <slouken@libsdl.org>
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diff changeset
128 #define SETPIXEL32_MASK(x, y) SETPIXEL_MASK(x, y, Uint32, 4, 16, 8, 0, 0xff, 0xff, 0xff);
1ef2f1e75ff7 Date: Sat, 20 Dec 2008 23:25:19 +0100
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diff changeset
129 #define SETPIXEL32_BLEND(x, y) SETPIXEL_BLEND(x, y, Uint32, 4, 16, 8, 0, 0xff, 0xff, 0xff);
1ef2f1e75ff7 Date: Sat, 20 Dec 2008 23:25:19 +0100
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diff changeset
130 #define SETPIXEL32_ADD(x, y) SETPIXEL_ADD(x, y, Uint32, 4, 16, 8, 0, 0xff, 0xff, 0xff);
1ef2f1e75ff7 Date: Sat, 20 Dec 2008 23:25:19 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 2888
diff changeset
131 #define SETPIXEL32_MOD(x, y) SETPIXEL_MOD(x, y, Uint32, 4, 16, 8, 0, 0xff, 0xff, 0xff);
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parents:
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132
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
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parents:
diff changeset
133 int
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
Sam Lantinga <slouken@libsdl.org>
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diff changeset
134 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
135 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
136 {
2896
1ef2f1e75ff7 Date: Sat, 20 Dec 2008 23:25:19 +0100
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diff changeset
137 Uint8 inva = 0xff - a;
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138 /* This function doesn't work on surfaces < 8 bpp */
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
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diff changeset
139 if (dst->format->BitsPerPixel < 8) {
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
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diff changeset
140 SDL_SetError("SDL_BlendLine(): Unsupported surface format");
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
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diff changeset
141 return (-1);
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parents:
diff changeset
142 }
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
Sam Lantinga <slouken@libsdl.org>
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diff changeset
143
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
Sam Lantinga <slouken@libsdl.org>
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diff changeset
144 /* Perform clipping */
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
Sam Lantinga <slouken@libsdl.org>
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diff changeset
145 /* FIXME
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
Sam Lantinga <slouken@libsdl.org>
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diff changeset
146 if (!SDL_IntersectRect(dstrect, &dst->clip_rect, dstrect)) {
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
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diff changeset
147 return (0);
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148 }
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
Sam Lantinga <slouken@libsdl.org>
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diff changeset
149 */
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Sam Lantinga <slouken@libsdl.org>
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diff changeset
150
2896
1ef2f1e75ff7 Date: Sat, 20 Dec 2008 23:25:19 +0100
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diff changeset
151 if ((blendMode == SDL_BLENDMODE_BLEND)
1ef2f1e75ff7 Date: Sat, 20 Dec 2008 23:25:19 +0100
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152 || (blendMode == SDL_BLENDMODE_ADD)) {
1ef2f1e75ff7 Date: Sat, 20 Dec 2008 23:25:19 +0100
Sam Lantinga <slouken@libsdl.org>
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153 r = MUL(r, a);
1ef2f1e75ff7 Date: Sat, 20 Dec 2008 23:25:19 +0100
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diff changeset
154 g = MUL(g, a);
1ef2f1e75ff7 Date: Sat, 20 Dec 2008 23:25:19 +0100
Sam Lantinga <slouken@libsdl.org>
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diff changeset
155 b = MUL(b, a);
1ef2f1e75ff7 Date: Sat, 20 Dec 2008 23:25:19 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 2888
diff changeset
156 }
1ef2f1e75ff7 Date: Sat, 20 Dec 2008 23:25:19 +0100
Sam Lantinga <slouken@libsdl.org>
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diff changeset
157 switch (dst->format->BitsPerPixel) {
1ef2f1e75ff7 Date: Sat, 20 Dec 2008 23:25:19 +0100
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158 case 15:
1ef2f1e75ff7 Date: Sat, 20 Dec 2008 23:25:19 +0100
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diff changeset
159 switch (blendMode) {
1ef2f1e75ff7 Date: Sat, 20 Dec 2008 23:25:19 +0100
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diff changeset
160 case SDL_BLENDMODE_MASK:
1ef2f1e75ff7 Date: Sat, 20 Dec 2008 23:25:19 +0100
Sam Lantinga <slouken@libsdl.org>
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diff changeset
161 BRESENHAM(x1, y1, x2, y2, SETPIXEL15_MASK);
1ef2f1e75ff7 Date: Sat, 20 Dec 2008 23:25:19 +0100
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162 break;
1ef2f1e75ff7 Date: Sat, 20 Dec 2008 23:25:19 +0100
Sam Lantinga <slouken@libsdl.org>
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163 case SDL_BLENDMODE_BLEND:
1ef2f1e75ff7 Date: Sat, 20 Dec 2008 23:25:19 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 2888
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164 BRESENHAM(x1, y1, x2, y2, SETPIXEL15_BLEND);
1ef2f1e75ff7 Date: Sat, 20 Dec 2008 23:25:19 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 2888
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165 break;
1ef2f1e75ff7 Date: Sat, 20 Dec 2008 23:25:19 +0100
Sam Lantinga <slouken@libsdl.org>
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166 case SDL_BLENDMODE_ADD:
1ef2f1e75ff7 Date: Sat, 20 Dec 2008 23:25:19 +0100
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diff changeset
167 BRESENHAM(x1, y1, x2, y2, SETPIXEL15_ADD);
1ef2f1e75ff7 Date: Sat, 20 Dec 2008 23:25:19 +0100
Sam Lantinga <slouken@libsdl.org>
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diff changeset
168 break;
1ef2f1e75ff7 Date: Sat, 20 Dec 2008 23:25:19 +0100
Sam Lantinga <slouken@libsdl.org>
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diff changeset
169 case SDL_BLENDMODE_MOD:
1ef2f1e75ff7 Date: Sat, 20 Dec 2008 23:25:19 +0100
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diff changeset
170 BRESENHAM(x1, y1, x2, y2, SETPIXEL15_MOD);
1ef2f1e75ff7 Date: Sat, 20 Dec 2008 23:25:19 +0100
Sam Lantinga <slouken@libsdl.org>
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diff changeset
171 break;
1ef2f1e75ff7 Date: Sat, 20 Dec 2008 23:25:19 +0100
Sam Lantinga <slouken@libsdl.org>
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diff changeset
172 }
1ef2f1e75ff7 Date: Sat, 20 Dec 2008 23:25:19 +0100
Sam Lantinga <slouken@libsdl.org>
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diff changeset
173 break;
1ef2f1e75ff7 Date: Sat, 20 Dec 2008 23:25:19 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 2888
diff changeset
174 case 16:
1ef2f1e75ff7 Date: Sat, 20 Dec 2008 23:25:19 +0100
Sam Lantinga <slouken@libsdl.org>
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175 switch (blendMode) {
1ef2f1e75ff7 Date: Sat, 20 Dec 2008 23:25:19 +0100
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parents: 2888
diff changeset
176 case SDL_BLENDMODE_MASK:
1ef2f1e75ff7 Date: Sat, 20 Dec 2008 23:25:19 +0100
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diff changeset
177 BRESENHAM(x1, y1, x2, y2, SETPIXEL16_MASK);
1ef2f1e75ff7 Date: Sat, 20 Dec 2008 23:25:19 +0100
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diff changeset
178 break;
1ef2f1e75ff7 Date: Sat, 20 Dec 2008 23:25:19 +0100
Sam Lantinga <slouken@libsdl.org>
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diff changeset
179 case SDL_BLENDMODE_BLEND:
1ef2f1e75ff7 Date: Sat, 20 Dec 2008 23:25:19 +0100
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parents: 2888
diff changeset
180 BRESENHAM(x1, y1, x2, y2, SETPIXEL16_BLEND);
1ef2f1e75ff7 Date: Sat, 20 Dec 2008 23:25:19 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 2888
diff changeset
181 break;
1ef2f1e75ff7 Date: Sat, 20 Dec 2008 23:25:19 +0100
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diff changeset
182 case SDL_BLENDMODE_ADD:
1ef2f1e75ff7 Date: Sat, 20 Dec 2008 23:25:19 +0100
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diff changeset
183 BRESENHAM(x1, y1, x2, y2, SETPIXEL16_ADD);
1ef2f1e75ff7 Date: Sat, 20 Dec 2008 23:25:19 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 2888
diff changeset
184 break;
1ef2f1e75ff7 Date: Sat, 20 Dec 2008 23:25:19 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 2888
diff changeset
185 case SDL_BLENDMODE_MOD:
1ef2f1e75ff7 Date: Sat, 20 Dec 2008 23:25:19 +0100
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parents: 2888
diff changeset
186 BRESENHAM(x1, y1, x2, y2, SETPIXEL16_MOD);
1ef2f1e75ff7 Date: Sat, 20 Dec 2008 23:25:19 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 2888
diff changeset
187 break;
1ef2f1e75ff7 Date: Sat, 20 Dec 2008 23:25:19 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 2888
diff changeset
188 }
1ef2f1e75ff7 Date: Sat, 20 Dec 2008 23:25:19 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 2888
diff changeset
189 break;
1ef2f1e75ff7 Date: Sat, 20 Dec 2008 23:25:19 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 2888
diff changeset
190 case 24:
1ef2f1e75ff7 Date: Sat, 20 Dec 2008 23:25:19 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 2888
diff changeset
191 case 32:
1ef2f1e75ff7 Date: Sat, 20 Dec 2008 23:25:19 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 2888
diff changeset
192 if (dst->format->BytesPerPixel != 4) {
1ef2f1e75ff7 Date: Sat, 20 Dec 2008 23:25:19 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 2888
diff changeset
193 SDL_Unsupported();
1ef2f1e75ff7 Date: Sat, 20 Dec 2008 23:25:19 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 2888
diff changeset
194 return -1;
1ef2f1e75ff7 Date: Sat, 20 Dec 2008 23:25:19 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 2888
diff changeset
195 }
1ef2f1e75ff7 Date: Sat, 20 Dec 2008 23:25:19 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 2888
diff changeset
196 switch (blendMode) {
1ef2f1e75ff7 Date: Sat, 20 Dec 2008 23:25:19 +0100
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parents: 2888
diff changeset
197 case SDL_BLENDMODE_MASK:
1ef2f1e75ff7 Date: Sat, 20 Dec 2008 23:25:19 +0100
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parents: 2888
diff changeset
198 BRESENHAM(x1, y1, x2, y2, SETPIXEL32_MASK);
1ef2f1e75ff7 Date: Sat, 20 Dec 2008 23:25:19 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 2888
diff changeset
199 break;
1ef2f1e75ff7 Date: Sat, 20 Dec 2008 23:25:19 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 2888
diff changeset
200 case SDL_BLENDMODE_BLEND:
1ef2f1e75ff7 Date: Sat, 20 Dec 2008 23:25:19 +0100
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parents: 2888
diff changeset
201 BRESENHAM(x1, y1, x2, y2, SETPIXEL32_BLEND);
1ef2f1e75ff7 Date: Sat, 20 Dec 2008 23:25:19 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 2888
diff changeset
202 break;
1ef2f1e75ff7 Date: Sat, 20 Dec 2008 23:25:19 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 2888
diff changeset
203 case SDL_BLENDMODE_ADD:
1ef2f1e75ff7 Date: Sat, 20 Dec 2008 23:25:19 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 2888
diff changeset
204 BRESENHAM(x1, y1, x2, y2, SETPIXEL32_ADD);
1ef2f1e75ff7 Date: Sat, 20 Dec 2008 23:25:19 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 2888
diff changeset
205 break;
1ef2f1e75ff7 Date: Sat, 20 Dec 2008 23:25:19 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 2888
diff changeset
206 case SDL_BLENDMODE_MOD:
1ef2f1e75ff7 Date: Sat, 20 Dec 2008 23:25:19 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 2888
diff changeset
207 BRESENHAM(x1, y1, x2, y2, SETPIXEL32_MOD);
1ef2f1e75ff7 Date: Sat, 20 Dec 2008 23:25:19 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 2888
diff changeset
208 break;
1ef2f1e75ff7 Date: Sat, 20 Dec 2008 23:25:19 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 2888
diff changeset
209 }
1ef2f1e75ff7 Date: Sat, 20 Dec 2008 23:25:19 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 2888
diff changeset
210 break;
1ef2f1e75ff7 Date: Sat, 20 Dec 2008 23:25:19 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 2888
diff changeset
211 default:
1ef2f1e75ff7 Date: Sat, 20 Dec 2008 23:25:19 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 2888
diff changeset
212 SDL_Unsupported();
1ef2f1e75ff7 Date: Sat, 20 Dec 2008 23:25:19 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 2888
diff changeset
213 return -1;
1ef2f1e75ff7 Date: Sat, 20 Dec 2008 23:25:19 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 2888
diff changeset
214 }
1ef2f1e75ff7 Date: Sat, 20 Dec 2008 23:25:19 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 2888
diff changeset
215 return 0;
2888
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
216 }
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
217
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
218 /* vi: set ts=4 sw=4 expandtab: */