Mercurial > sdl-ios-xcode

annotate test/testeyes.c @ 4785:ef8b32ef9793

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Updated test code, updated win32 code a bit (still not complete, but hopefully tonight), and removed the last vestiges of ellipse and polygon drawing support.
author Eli Gottlieb <eligottlieb@gmail.com>
date Tue, 06 Jul 2010 22:05:22 -0400
parents cf7976fd3258
children 6f0bc179771c
rev   line source
4770
cf7976fd3258 Moved the SDL_Eyes test program for shaped windows into the Hg repository and got it building and linking as a test.
Eli Gottlieb <eligottlieb@gmail.com>
parents:
diff changeset
1 #include <stdlib.h>
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2 #include <math.h>
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3 #include <SDL_events.h>
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4 #include <SDL_rect.h>
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5 #include <SDL_pixels.h>
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6 #include <SDL_video.h>
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7 #include <SDL_shape.h>
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8 #include "testeyes_bitmap.h"
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9 #include "testeyes_mask_bitmap.h"
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10
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11 /* The following code for the calculation of pupil positions has been taken and rewritten from the original xeyes. The
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12 copyright notice is included as follows, and the code is now under the same license as the rest of this file. */
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13 /*
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14
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15 Copyright (c) 1991 X Consortium
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16
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17 Permission is hereby granted, free of charge, to any person obtaining
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18 a copy of this software and associated documentation files (the
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19 "Software"), to deal in the Software without restriction, including
cf7976fd3258 Moved the SDL_Eyes test program for shaped windows into the Hg repository and got it building and linking as a test.
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20 without limitation the rights to use, copy, modify, merge, publish,
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21 distribute, sublicense, and/or sell copies of the Software, and to
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22 permit persons to whom the Software is furnished to do so, subject to
cf7976fd3258 Moved the SDL_Eyes test program for shaped windows into the Hg repository and got it building and linking as a test.
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23 the following conditions:
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24
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25 The above copyright notice and this permission notice shall be included
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26 in all copies or substantial portions of the Software.
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27
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28 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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29 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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30 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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31 IN NO EVENT SHALL THE X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR
cf7976fd3258 Moved the SDL_Eyes test program for shaped windows into the Hg repository and got it building and linking as a test.
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32 OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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33 ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
cf7976fd3258 Moved the SDL_Eyes test program for shaped windows into the Hg repository and got it building and linking as a test.
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34 OTHER DEALINGS IN THE SOFTWARE.
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35
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36 Except as contained in this notice, the name of the X Consortium shall
cf7976fd3258 Moved the SDL_Eyes test program for shaped windows into the Hg repository and got it building and linking as a test.
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37 not be used in advertising or otherwise to promote the sale, use or
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38 other dealings in this Software without prior written authorization
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39 from the X Consortium.
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40
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41 */
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42 # define NUM_EYES 2
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43 # define EYE_X(n) ((n) * 2.0)
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44 # define EYE_Y(n) (0.0)
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45 # define EYE_THICK (0.175) /* thickness of eye rim */
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46 # define EYE_OFFSET (0.1) /* padding between eyes */
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47 # define EYE_WIDTH (2.0 - (EYE_THICK + EYE_OFFSET) * 2)
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48 # define EYE_HEIGHT EYE_WIDTH
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49 # define EYE_HWIDTH (EYE_WIDTH / 2.0)
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50 # define EYE_HHEIGHT (EYE_HEIGHT / 2.0)
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51 # define BALL_WIDTH (0.3)
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52 # define BALL_HEIGHT BALL_WIDTH
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53 # define BALL_PAD (0.05)
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54 # define BALL_DIST ((EYE_WIDTH - BALL_WIDTH) / 2.0 - BALL_PAD)
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55
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56 SDL_Point computePupil (int num,SDL_Point mouse) {
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57 double dx = mouse.x - EYE_X(num);
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58 double dy = mouse.y - EYE_Y(num);
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59 double cx = 0.0,cy = 0.0;
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60 if(dx == 0 && dy == 0) {
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61 cx = EYE_X(num);
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62 cy = EYE_Y(num);
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63 }
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64 else {
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65 double angle = atan2((double)dy,(double)dx);
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66 double cosa = cos(angle);
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67 double sina = sin(angle);
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68 double hypotenuse = hypot(EYE_HHEIGHT * cosa, EYE_HWIDTH * sina);
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69 double dist = BALL_DIST * hypot((EYE_HWIDTH * EYE_HHEIGHT) * cosa / hypotenuse,
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70 (EYE_HWIDTH * EYE_HHEIGHT) * sina / hypotenuse);
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71 if(dist > hypot((double)dx,(double)dy)) {
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72 cx = dx + EYE_X(num);
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73 cy = dy + EYE_Y(num);
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74 }
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75 else {
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76 cx = dist * cosa + EYE_X(num);
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77 cy = dist * sina + EYE_Y(num);
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78 }
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79 }
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80 SDL_Point ret = {cx,cy};
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81 return ret;
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82 }
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83
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84 /* Here begins the code exclusively and entirely written by Eli Gottlieb in May 2010. */
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85 typedef struct {
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86 SDL_Rect left;
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87 SDL_Rect right;
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88 } Pupil_Pair;
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89 typedef struct {
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90 SDL_Point left;
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91 SDL_Point right;
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92 } Pupil_Points;
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93
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94 Pupil_Pair compute_pupil_positions(SDL_Point target) {
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95 Pupil_Pair result;
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96 Pupil_Points points;
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97 points.left = computePupil(0,target);
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98 points.right = computePupil(1,target);
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99 result.left.x = points.left.x - BALL_WIDTH / 2.0;
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100 result.left.y = points.left.y - BALL_HEIGHT / 2.0;
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101 result.right.x = points.right.x - BALL_WIDTH / 2.0;
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102 result.right.y = points.right.y - BALL_HEIGHT / 2.0;
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103 result.left.w = result.right.w = BALL_WIDTH;
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104 result.left.h = result.left.w = BALL_HEIGHT;
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105 return result;
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106 }
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107
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108 void render_eyes(SDL_Window *window,SDL_Texture *eyes_texture,Pupil_Pair pupils) {
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109 SDL_SelectRenderer(window);
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110
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111 //Clear render-target to blue.
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112 SDL_SetRenderDrawColor(0x00,0x00,0xff,0xff);
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113 SDL_RenderClear();
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114
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115 //Render the whites of the eyes.
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116 SDL_Rect srcdestrect = {0,0,eyes_width,eyes_height};
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117 SDL_RenderCopy(eyes_texture,&srcdestrect,&srcdestrect);
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118
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119 //Render the pupils.
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120 SDL_SetRenderDrawColor(0x00,0x00,0x00,0xff);
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121 const SDL_Rect eyes[2] = {pupils.left,pupils.right};
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122 SDL_RenderFillRects((const SDL_Rect**)&eyes,2);
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123
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124 SDL_RenderPresent();
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125 }
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126
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127 int main(int argc,char** argv) {
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128 if(SDL_VideoInit(NULL,0) == -1) {
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129 printf("Could not initialize SDL video.\n");
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130 exit(-1);
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131 }
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132
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133 SDL_Window *window = SDL_CreateShapedWindow("Big Brother is watching you.",eyes_x_hot,eyes_y_hot,eyes_width,eyes_height,SDL_WINDOW_RESIZABLE);
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134 if(window == NULL) {
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135 SDL_VideoQuit();
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136 printf("Could not create shaped window for eyes.\n");
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137 exit(-2);
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138 }
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139 if(SDL_CreateRenderer(window,-1,SDL_RENDERER_PRESENTFLIP2) == -1) {
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140 SDL_DestroyWindow(window);
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141 SDL_VideoQuit();
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142 printf("Could not create rendering context for SDL_Eyes window.\n");
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143 exit(-3);
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144 }
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145
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146 SDL_Color bnw_palette[2] = {{0,0,0,255},{255,255,255,255}};
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147 SDL_Texture *eyes_texture = SDL_CreateTexture(SDL_PIXELFORMAT_INDEX1LSB,SDL_TEXTUREACCESS_STREAMING,eyes_width,eyes_height);
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148 if(eyes_texture == NULL) {
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149 SDL_DestroyRenderer(window);
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150 SDL_DestroyWindow(window);
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151 SDL_VideoQuit();
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152 printf("Could not create eyes texture.\n");
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153 exit(-4);
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154 }
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155 SDL_SetTexturePalette(eyes_texture,bnw_palette,0,2);
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156
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157 void *pixels = NULL;
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158 int pitch = 0;
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159 SDL_Rect rect = {0,0,eyes_width,eyes_height};
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160 SDL_LockTexture(eyes_texture,&rect,1,&pixels,&pitch);
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161 for(int row = 0;row<eyes_height;row++)
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162 memcpy(pixels+pitch*row,eyes_bits+(eyes_width/8)*row,eyes_width/8);
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163 SDL_UnlockTexture(eyes_texture);
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164
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165 int bpp = 0;
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166 Uint32 r = 0,g = 0,b = 0,a = 0;
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167 SDL_PixelFormatEnumToMasks(SDL_PIXELFORMAT_ARGB4444,&bpp,&r,&g,&b,&a);
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168 SDL_Surface *mask = SDL_CreateRGBSurface(0,eyesmask_width,eyesmask_height,bpp,r,g,b,a);
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169 if(mask == NULL) {
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170 SDL_DestroyTexture(eyes_texture);
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171 SDL_DestroyRenderer(window);
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172 SDL_DestroyWindow(window);
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173 SDL_VideoQuit();
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174 printf("Could not create shape mask texture.\n");
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175 exit(-5);
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176 }
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177
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178 if(SDL_MUSTLOCK(mask))
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179 SDL_LockSurface(mask);
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180 pixels = mask->pixels;
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181 for(int y=0;y<eyesmask_height;y++)
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182 for(int x=0;x<eyesmask_width;x++) {
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183 Uint8 alpha = *(Uint8*)(eyesmask_bits+(eyesmask_width/8)*y+(x/8)) & (1 << (7 - x % 8)) ? 1 : 0;
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184 *(Uint16*)(pixels+pitch*y+x*bpp/8) = SDL_MapRGBA(mask->format,0,0,0,alpha);
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185 }
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186 if(SDL_MUSTLOCK(mask))
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187 SDL_UnlockSurface(mask);
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188
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189 SDL_WindowShapeMode mode = {ShapeModeDefault,1};
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190 SDL_SetWindowShape(window,mask,&mode);
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191
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192 SDL_Event event;
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193 int event_pending = 0;
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194 event_pending = SDL_PollEvent(&event);
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195 SDL_Point mouse_position;
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196 Pupil_Pair pupil_positions;
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197 SDL_SelectMouse(0);
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198 SDL_GetMouseState(&mouse_position.x,&mouse_position.y);
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199 pupil_positions = compute_pupil_positions(mouse_position);
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200 while(event.type != SDL_QUIT) {
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201 if(event.type == SDL_MOUSEMOTION) {
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202 mouse_position.x = event.motion.x;
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203 mouse_position.y = event.motion.y;
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204 pupil_positions = compute_pupil_positions(mouse_position);
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205 }
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206 render_eyes(window,eyes_texture,pupil_positions);
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207 event_pending = SDL_PollEvent(&event);
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208 }
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209
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210 SDL_FreeSurface(mask);
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211 SDL_DestroyTexture(eyes_texture);
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212 SDL_DestroyWindow(window);
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213 //Call SDL_VideoQuit() before quitting.
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214 SDL_VideoQuit();
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215 }