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annotate src/render/software/SDL_drawpoint.c @ 5275:7aba0406c273

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Frank Zago to sdl The following patch fixes some of the bitrot for the Nintendo DS port. The support is still basic at the moment, but it allows to run the "general" test under the current head of tree (parent: 5269:11bd1585efb5 tip). Most of the patch is mine, but I integrated a couple changes that John Magnotti posted on Feb 1st.
author Sam Lantinga <slouken@libsdl.org>
date Sat, 12 Feb 2011 11:36:56 -0800
parents b530ef003506
children
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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b530ef003506 Happy 2011! :)
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3 Copyright (C) 1997-2011 Sam Lantinga
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4
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5 This library is free software; you can redistribute it and/or
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6 modify it under the terms of the GNU Lesser General Public
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7 License as published by the Free Software Foundation; either
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8 version 2.1 of the License, or (at your option) any later version.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Lesser General Public License for more details.
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14
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15 You should have received a copy of the GNU Lesser General Public
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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 #if !SDL_RENDER_DISABLED
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25
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26 #include "SDL_draw.h"
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27 #include "SDL_drawpoint.h"
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28
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29
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30 int
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31 SDL_DrawPoint(SDL_Surface * dst, int x, int y, Uint32 color)
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32 {
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33 if (!dst) {
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34 SDL_SetError("Passed NULL destination surface");
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35 return -1;
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36 }
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37
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38 /* This function doesn't work on surfaces < 8 bpp */
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39 if (dst->format->BitsPerPixel < 8) {
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40 SDL_SetError("SDL_DrawPoint(): Unsupported surface format");
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41 return -1;
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42 }
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43
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44 /* Perform clipping */
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45 if (x < dst->clip_rect.x || y < dst->clip_rect.y ||
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46 x >= (dst->clip_rect.x + dst->clip_rect.w) ||
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47 y >= (dst->clip_rect.y + dst->clip_rect.h)) {
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48 return 0;
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49 }
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50
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51 switch (dst->format->BytesPerPixel) {
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52 case 1:
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53 DRAW_FASTSETPIXELXY1(x, y);
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54 break;
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55 case 2:
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56 DRAW_FASTSETPIXELXY2(x, y);
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57 break;
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58 case 3:
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59 SDL_Unsupported();
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60 return -1;
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61 case 4:
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62 DRAW_FASTSETPIXELXY4(x, y);
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63 break;
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64 }
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65 return 0;
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66 }
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67
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68 int
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69 SDL_DrawPoints(SDL_Surface * dst, const SDL_Point * points, int count,
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70 Uint32 color)
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71 {
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72 int minx, miny;
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73 int maxx, maxy;
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74 int i;
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75 int x, y;
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76
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77 if (!dst) {
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78 SDL_SetError("Passed NULL destination surface");
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79 return -1;
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80 }
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81
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82 /* This function doesn't work on surfaces < 8 bpp */
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83 if (dst->format->BitsPerPixel < 8) {
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84 SDL_SetError("SDL_DrawPoints(): Unsupported surface format");
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85 return -1;
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86 }
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87
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88 minx = dst->clip_rect.x;
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89 maxx = dst->clip_rect.x + dst->clip_rect.w - 1;
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90 miny = dst->clip_rect.y;
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91 maxy = dst->clip_rect.y + dst->clip_rect.h - 1;
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92
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93 for (i = 0; i < count; ++i) {
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94 x = points[i].x;
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95 y = points[i].y;
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96
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97 if (x < minx || x > maxx || y < miny || y > maxy) {
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98 continue;
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99 }
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100
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101 switch (dst->format->BytesPerPixel) {
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102 case 1:
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103 DRAW_FASTSETPIXELXY1(x, y);
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104 break;
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105 case 2:
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106 DRAW_FASTSETPIXELXY2(x, y);
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107 break;
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108 case 3:
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109 SDL_Unsupported();
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110 return -1;
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111 case 4:
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112 DRAW_FASTSETPIXELXY4(x, y);
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113 break;
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114 }
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115 }
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116 return 0;
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117 }
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118
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119 #endif /* !SDL_RENDER_DISABLED */
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120
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121 /* vi: set ts=4 sw=4 expandtab: */