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Moved the SDL_Eyes test program for shaped windows into the Hg reposi…
…tory and got it building and linking as a test.
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Eli Gottlieb
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Jun 1, 2010
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#include <stdlib.h> | ||
#include <math.h> | ||
#include <SDL_events.h> | ||
#include <SDL_rect.h> | ||
#include <SDL_pixels.h> | ||
#include <SDL_video.h> | ||
#include <SDL_shape.h> | ||
#include "testeyes_bitmap.h" | ||
#include "testeyes_mask_bitmap.h" | ||
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/* The following code for the calculation of pupil positions has been taken and rewritten from the original xeyes. The | ||
copyright notice is included as follows, and the code is now under the same license as the rest of this file. */ | ||
/* | ||
Copyright (c) 1991 X Consortium | ||
Permission is hereby granted, free of charge, to any person obtaining | ||
a copy of this software and associated documentation files (the | ||
"Software"), to deal in the Software without restriction, including | ||
without limitation the rights to use, copy, modify, merge, publish, | ||
distribute, sublicense, and/or sell copies of the Software, and to | ||
permit persons to whom the Software is furnished to do so, subject to | ||
the following conditions: | ||
The above copyright notice and this permission notice shall be included | ||
in all copies or substantial portions of the Software. | ||
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS | ||
OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | ||
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. | ||
IN NO EVENT SHALL THE X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR | ||
OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, | ||
ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR | ||
OTHER DEALINGS IN THE SOFTWARE. | ||
Except as contained in this notice, the name of the X Consortium shall | ||
not be used in advertising or otherwise to promote the sale, use or | ||
other dealings in this Software without prior written authorization | ||
from the X Consortium. | ||
*/ | ||
# define NUM_EYES 2 | ||
# define EYE_X(n) ((n) * 2.0) | ||
# define EYE_Y(n) (0.0) | ||
# define EYE_THICK (0.175) /* thickness of eye rim */ | ||
# define EYE_OFFSET (0.1) /* padding between eyes */ | ||
# define EYE_WIDTH (2.0 - (EYE_THICK + EYE_OFFSET) * 2) | ||
# define EYE_HEIGHT EYE_WIDTH | ||
# define EYE_HWIDTH (EYE_WIDTH / 2.0) | ||
# define EYE_HHEIGHT (EYE_HEIGHT / 2.0) | ||
# define BALL_WIDTH (0.3) | ||
# define BALL_HEIGHT BALL_WIDTH | ||
# define BALL_PAD (0.05) | ||
# define BALL_DIST ((EYE_WIDTH - BALL_WIDTH) / 2.0 - BALL_PAD) | ||
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SDL_Point computePupil (int num,SDL_Point mouse) { | ||
double dx = mouse.x - EYE_X(num); | ||
double dy = mouse.y - EYE_Y(num); | ||
double cx = 0.0,cy = 0.0; | ||
if(dx == 0 && dy == 0) { | ||
cx = EYE_X(num); | ||
cy = EYE_Y(num); | ||
} | ||
else { | ||
double angle = atan2((double)dy,(double)dx); | ||
double cosa = cos(angle); | ||
double sina = sin(angle); | ||
double hypotenuse = hypot(EYE_HHEIGHT * cosa, EYE_HWIDTH * sina); | ||
double dist = BALL_DIST * hypot((EYE_HWIDTH * EYE_HHEIGHT) * cosa / hypotenuse, | ||
(EYE_HWIDTH * EYE_HHEIGHT) * sina / hypotenuse); | ||
if(dist > hypot((double)dx,(double)dy)) { | ||
cx = dx + EYE_X(num); | ||
cy = dy + EYE_Y(num); | ||
} | ||
else { | ||
cx = dist * cosa + EYE_X(num); | ||
cy = dist * sina + EYE_Y(num); | ||
} | ||
} | ||
SDL_Point ret = {cx,cy}; | ||
return ret; | ||
} | ||
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/* Here begins the code exclusively and entirely written by Eli Gottlieb in May 2010. */ | ||
typedef struct { | ||
SDL_Rect left; | ||
SDL_Rect right; | ||
} Pupil_Pair; | ||
typedef struct { | ||
SDL_Point left; | ||
SDL_Point right; | ||
} Pupil_Points; | ||
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Pupil_Pair compute_pupil_positions(SDL_Point target) { | ||
Pupil_Pair result; | ||
Pupil_Points points; | ||
points.left = computePupil(0,target); | ||
points.right = computePupil(1,target); | ||
result.left.x = points.left.x - BALL_WIDTH / 2.0; | ||
result.left.y = points.left.y - BALL_HEIGHT / 2.0; | ||
result.right.x = points.right.x - BALL_WIDTH / 2.0; | ||
result.right.y = points.right.y - BALL_HEIGHT / 2.0; | ||
result.left.w = result.right.w = BALL_WIDTH; | ||
result.left.h = result.left.w = BALL_HEIGHT; | ||
return result; | ||
} | ||
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void render_eyes(SDL_Window *window,SDL_Texture *eyes_texture,Pupil_Pair pupils) { | ||
SDL_SelectRenderer(window); | ||
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//Clear render-target to blue. | ||
SDL_SetRenderDrawColor(0x00,0x00,0xff,0xff); | ||
SDL_RenderClear(); | ||
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//Render the whites of the eyes. | ||
SDL_Rect srcdestrect = {0,0,eyes_width,eyes_height}; | ||
SDL_RenderCopy(eyes_texture,&srcdestrect,&srcdestrect); | ||
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//Render the pupils. | ||
SDL_SetRenderDrawColor(0x00,0x00,0x00,0xff); | ||
const SDL_Rect eyes[2] = {pupils.left,pupils.right}; | ||
SDL_RenderFillRects((const SDL_Rect**)&eyes,2); | ||
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SDL_RenderPresent(); | ||
} | ||
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int main(int argc,char** argv) { | ||
if(SDL_VideoInit(NULL,0) == -1) { | ||
printf("Could not initialize SDL video.\n"); | ||
exit(-1); | ||
} | ||
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SDL_Window *window = SDL_CreateShapedWindow("Big Brother is watching you.",eyes_x_hot,eyes_y_hot,eyes_width,eyes_height,SDL_WINDOW_RESIZABLE); | ||
if(window == NULL) { | ||
SDL_VideoQuit(); | ||
printf("Could not create shaped window for eyes.\n"); | ||
exit(-2); | ||
} | ||
if(SDL_CreateRenderer(window,-1,SDL_RENDERER_PRESENTFLIP2) == -1) { | ||
SDL_DestroyWindow(window); | ||
SDL_VideoQuit(); | ||
printf("Could not create rendering context for SDL_Eyes window.\n"); | ||
exit(-3); | ||
} | ||
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SDL_Color bnw_palette[2] = {{0,0,0,0},{255,255,255,255}}; | ||
SDL_Texture *eyes_texture = SDL_CreateTexture(SDL_PIXELFORMAT_INDEX1LSB,SDL_TEXTUREACCESS_STREAMING,eyes_width,eyes_height); | ||
if(eyes_texture == NULL) { | ||
SDL_DestroyRenderer(window); | ||
SDL_DestroyWindow(window); | ||
SDL_VideoQuit(); | ||
printf("Could not create eyes texture.\n"); | ||
exit(-4); | ||
} | ||
SDL_SetTexturePalette(eyes_texture,bnw_palette,0,2); | ||
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void *pixels = NULL; | ||
int pitch = 0; | ||
SDL_Rect rect = {0,0,eyes_width,eyes_height}; | ||
SDL_LockTexture(eyes_texture,&rect,1,&pixels,&pitch); | ||
for(int row = 0;row<eyes_height;row++) | ||
memcpy(pixels+pitch*row,eyes_bits+(eyes_width/8)*row,eyes_width/8); | ||
SDL_UnlockTexture(eyes_texture); | ||
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SDL_Texture *mask_texture = SDL_CreateTexture(SDL_PIXELFORMAT_INDEX1LSB,SDL_TEXTUREACCESS_STREAMING,eyesmask_width,eyesmask_height); | ||
if(mask_texture == NULL) { | ||
SDL_DestroyTexture(eyes_texture); | ||
SDL_DestroyRenderer(window); | ||
SDL_DestroyWindow(window); | ||
SDL_VideoQuit(); | ||
printf("Could not create shape mask texture.\n"); | ||
exit(-5); | ||
} | ||
SDL_SetTexturePalette(mask_texture,bnw_palette,0,2); | ||
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rect.x = rect.y = 0; | ||
rect.w = eyesmask_width; | ||
rect.h = eyesmask_height; | ||
SDL_LockTexture(mask_texture,&rect,1,&pixels,&pitch); | ||
for(int row = 0;row<eyesmask_height;row++) | ||
memcpy(pixels+pitch*row,eyesmask_bits+(eyesmask_width/8)*row,eyesmask_width/8); | ||
SDL_UnlockTexture(mask_texture); | ||
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SDL_SelectShapeRenderer(window); | ||
SDL_RenderCopy(mask_texture,&rect,&rect); | ||
SDL_RenderPresent(); | ||
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SDL_Event event; | ||
int event_pending = 0; | ||
event_pending = SDL_PollEvent(&event); | ||
SDL_Point mouse_position; | ||
Pupil_Pair pupil_positions; | ||
SDL_SelectMouse(0); | ||
SDL_GetMouseState(&mouse_position.x,&mouse_position.y); | ||
pupil_positions = compute_pupil_positions(mouse_position); | ||
while(event.type != SDL_QUIT) { | ||
if(event.type == SDL_MOUSEMOTION) { | ||
mouse_position.x = event.motion.x; | ||
mouse_position.y = event.motion.y; | ||
pupil_positions = compute_pupil_positions(mouse_position); | ||
} | ||
render_eyes(window,eyes_texture,pupil_positions); | ||
event_pending = SDL_PollEvent(&event); | ||
} | ||
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//Call SDL_VideoQuit() before quitting. | ||
SDL_VideoQuit(); | ||
} |
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#define eyes_width 48 | ||
#define eyes_height 32 | ||
#define eyes_x_hot 0 | ||
#define eyes_y_hot 0 | ||
static unsigned char eyes_bits[] = { | ||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, | ||
0x00, 0x78, 0x00, 0x00, 0x1e, 0x00, 0x00, 0xfe, 0x01, 0x80, 0x7f, 0x00, | ||
0x00, 0x87, 0x03, 0xc0, 0xe1, 0x00, 0x80, 0x01, 0x06, 0x60, 0x80, 0x01, | ||
0xc0, 0x00, 0x0c, 0x30, 0x00, 0x03, 0x60, 0x00, 0x18, 0x18, 0x00, 0x06, | ||
0x30, 0x00, 0x30, 0x0c, 0x00, 0x0c, 0x30, 0x00, 0x30, 0x0c, 0x00, 0x0c, | ||
0x10, 0x00, 0x20, 0x04, 0x00, 0x08, 0x18, 0x00, 0x60, 0x06, 0x00, 0x18, | ||
0x18, 0x00, 0x60, 0x06, 0x00, 0x18, 0x18, 0x00, 0x60, 0x06, 0x00, 0x18, | ||
0x18, 0x00, 0x60, 0x06, 0x00, 0x18, 0x18, 0x00, 0x60, 0x06, 0x00, 0x18, | ||
0x18, 0x00, 0x60, 0x06, 0x00, 0x18, 0x18, 0x80, 0x63, 0x06, 0x00, 0x18, | ||
0x18, 0x80, 0x63, 0x06, 0xe0, 0x18, 0x18, 0x80, 0x63, 0x06, 0xe0, 0x18, | ||
0x18, 0x00, 0x60, 0x06, 0xe0, 0x18, 0x18, 0x00, 0x20, 0x06, 0x00, 0x08, | ||
0x10, 0x00, 0x30, 0x04, 0x00, 0x0c, 0x10, 0x00, 0x10, 0x04, 0x00, 0x04, | ||
0x30, 0x00, 0x18, 0x0c, 0x00, 0x06, 0x60, 0x00, 0x08, 0x18, 0x00, 0x02, | ||
0x40, 0x00, 0x0c, 0x10, 0x00, 0x03, 0xc0, 0x00, 0x06, 0x30, 0x80, 0x01, | ||
0x80, 0x83, 0x03, 0xe0, 0xe0, 0x00, 0x00, 0xff, 0x01, 0xc0, 0x7f, 0x00, | ||
0x00, 0xfe, 0x00, 0x00, 0x3f, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}; |
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#define eyesmask_width 48 | ||
#define eyesmask_height 32 | ||
#define eyesmask_x_hot 0 | ||
#define eyesmask_y_hot 0 | ||
static unsigned char eyesmask_bits[] = { | ||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, | ||
0x00, 0x78, 0x00, 0x00, 0x1e, 0x00, 0x00, 0xfe, 0x01, 0x80, 0x7f, 0x00, | ||
0x00, 0xff, 0x03, 0xc0, 0xff, 0x00, 0x80, 0xff, 0x07, 0xe0, 0xff, 0x01, | ||
0xc0, 0xff, 0x0f, 0xf0, 0xff, 0x03, 0xe0, 0xff, 0x1f, 0xf8, 0xff, 0x07, | ||
0xf0, 0xff, 0x3f, 0xfc, 0xff, 0x0f, 0xf0, 0xff, 0x3f, 0xfc, 0xff, 0x0f, | ||
0xf0, 0xff, 0x3f, 0xfc, 0xff, 0x0f, 0xf8, 0xff, 0x7f, 0xfe, 0xff, 0x1f, | ||
0xf8, 0xff, 0x7f, 0xfe, 0xff, 0x1f, 0xf8, 0xff, 0x7f, 0xfe, 0xff, 0x1f, | ||
0xf8, 0xff, 0x7f, 0xfe, 0xff, 0x1f, 0xf8, 0xff, 0x7f, 0xfe, 0xff, 0x1f, | ||
0xf8, 0xff, 0x7f, 0xfe, 0xff, 0x1f, 0xf8, 0xff, 0x7f, 0xfe, 0xff, 0x1f, | ||
0xf8, 0xff, 0x7f, 0xfe, 0xff, 0x1f, 0xf8, 0xff, 0x7f, 0xfe, 0xff, 0x1f, | ||
0xf8, 0xff, 0x7f, 0xfe, 0xff, 0x1f, 0xf8, 0xff, 0x3f, 0xfe, 0xff, 0x0f, | ||
0xf0, 0xff, 0x3f, 0xfc, 0xff, 0x0f, 0xf0, 0xff, 0x1f, 0xfc, 0xff, 0x07, | ||
0xf0, 0xff, 0x1f, 0xfc, 0xff, 0x07, 0xe0, 0xff, 0x0f, 0xf8, 0xff, 0x03, | ||
0xc0, 0xff, 0x0f, 0xf0, 0xff, 0x03, 0xc0, 0xff, 0x07, 0xf0, 0xff, 0x01, | ||
0x80, 0xff, 0x03, 0xe0, 0xff, 0x00, 0x00, 0xff, 0x01, 0xc0, 0x7f, 0x00, | ||
0x00, 0xfe, 0x00, 0x00, 0x3f, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}; |