Mercurial > sdl-ios-xcode
annotate docs/html/sdlresizeevent.html @ 876:9e84d106ec19
(Said Max Horn on the SDL mailing list...)
Hi folks,
based on Eric Wing's patch, I created the attached patch which fixes
the OpenGL coordinate inversion bug in SDL. It works fine over here on
10.3 with Ryan's test program (which I also attached).
There is another change in it: I removed the "- 1" in the two lines
using CGDisplayPixelsHigh()... while I understand from a logical point
of view why they *should* be correct, I checked the actual values
computed that way, and they were off-by-one. After removing the " - 1",
the returned mouse coordinates are correct. I checked this by moving
the mouse to the screen top/bottom in fullscreen mode, BTW. With the
change, the proper values 0 and 479 are returned (in 640x480 mode).
Sam, you may still want to test on 10.1, it's very simple using Ryan's
minimal test code :-)
Cheers,
Max
(Here is the reproduction case for revision history's sake...)
/*
* To compile:
* gcc -o test test.c `sdl-config --cflags` `sdl-config --libs` -framework OpenGL
*
* --ryan.
*/
#include <stdio.h>
#include "SDL.h"
#include "SDL_opengl.h"
int main(int argc, char **argv)
{
Uint32 flags = SDL_OPENGL /* | SDL_FULLSCREEN */;
SDL_Surface *screen;
SDL_Event event;
int done = 0;
GLfloat ratio;
SDL_Init(SDL_INIT_VIDEO);
SDL_ShowCursor(0);
if ((argv[1]) && (strcmp(argv[1], "--grab") == 0))
SDL_WM_GrabInput(SDL_GRAB_ON);
screen = SDL_SetVideoMode(640, 480, 0, flags);
if (!screen)
return(42);
ratio = ((GLfloat) screen->w) / ((GLfloat) screen->h);
glClearColor( 0.0f, 0.0f, 0.0f, 0.0f );
glClearDepth( 1.0f );
glEnable( GL_DEPTH_TEST );
glDepthFunc( GL_LEQUAL );
glViewport( 0, 0, screen->w, screen->h);
glMatrixMode( GL_PROJECTION );
glLoadIdentity();
gluPerspective( 45.0f, ratio, 0.1f, 100.0f );
glMatrixMode( GL_MODELVIEW );
glLoadIdentity();
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
SDL_GL_SwapBuffers();
// eh, close enough.
#define MAX_X 6.12
#define MAX_Y 4.50
while (!done)
{
int x, y;
GLfloat glx, gly;
if (!SDL_WaitEvent(&event))
break;
switch (event.type)
{
case SDL_KEYUP:
if (event.key.keysym.sym == SDLK_ESCAPE)
done = 1;
break;
}
SDL_GetMouseState(&x, &y);
glx = ((((GLfloat) x) / ((GLfloat) screen->w)) - 0.5f) * MAX_X;
gly = ((((GLfloat) y) / ((GLfloat) screen->h)) - 0.5f) * MAX_Y;
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glLoadIdentity();
glTranslatef(glx,-gly,-6.0f);
glBegin(GL_TRIANGLES);
glColor3f(1,0,0); glVertex3f( 0.00f, 0.25f, 0.00f);
glColor3f(0,1,0); glVertex3f(-0.25f, -0.25f, 0.00f);
glColor3f(0,0,1); glVertex3f( 0.25f, -0.25f, 0.00f);
glEnd();
SDL_GL_SwapBuffers();
}
SDL_Quit();
return(0);
}
/* end of test.c ... */
author | Ryan C. Gordon <icculus@icculus.org> |
---|---|
date | Mon, 22 Mar 2004 09:38:20 +0000 |
parents | 355632dca928 |
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rev | line source |
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0 | 1 <HTML |
2 ><HEAD | |
3 ><TITLE | |
4 >SDL_ResizeEvent</TITLE | |
5 ><META | |
6 NAME="GENERATOR" | |
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7 CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+ |
0 | 8 "><LINK |
9 REL="HOME" | |
10 TITLE="SDL Library Documentation" | |
11 HREF="index.html"><LINK | |
12 REL="UP" | |
13 TITLE="SDL Event Structures." | |
14 HREF="eventstructures.html"><LINK | |
15 REL="PREVIOUS" | |
16 TITLE="SDL_JoyBallEvent" | |
17 HREF="sdljoyballevent.html"><LINK | |
18 REL="NEXT" | |
181
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19 TITLE="SDL_ExposeEvent" |
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20 HREF="sdlexposeevent.html"></HEAD |
0 | 21 ><BODY |
22 CLASS="REFENTRY" | |
23 BGCOLOR="#FFF8DC" | |
24 TEXT="#000000" | |
25 LINK="#0000ee" | |
26 VLINK="#551a8b" | |
27 ALINK="#ff0000" | |
28 ><DIV | |
29 CLASS="NAVHEADER" | |
30 ><TABLE | |
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31 SUMMARY="Header navigation table" |
0 | 32 WIDTH="100%" |
33 BORDER="0" | |
34 CELLPADDING="0" | |
35 CELLSPACING="0" | |
36 ><TR | |
37 ><TH | |
38 COLSPAN="3" | |
39 ALIGN="center" | |
40 >SDL Library Documentation</TH | |
41 ></TR | |
42 ><TR | |
43 ><TD | |
44 WIDTH="10%" | |
45 ALIGN="left" | |
46 VALIGN="bottom" | |
47 ><A | |
48 HREF="sdljoyballevent.html" | |
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49 ACCESSKEY="P" |
0 | 50 >Prev</A |
51 ></TD | |
52 ><TD | |
53 WIDTH="80%" | |
54 ALIGN="center" | |
55 VALIGN="bottom" | |
56 ></TD | |
57 ><TD | |
58 WIDTH="10%" | |
59 ALIGN="right" | |
60 VALIGN="bottom" | |
61 ><A | |
181
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62 HREF="sdlexposeevent.html" |
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63 ACCESSKEY="N" |
0 | 64 >Next</A |
65 ></TD | |
66 ></TR | |
67 ></TABLE | |
68 ><HR | |
69 ALIGN="LEFT" | |
70 WIDTH="100%"></DIV | |
71 ><H1 | |
72 ><A | |
73 NAME="SDLRESIZEEVENT" | |
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74 ></A |
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75 >SDL_ResizeEvent</H1 |
0 | 76 ><DIV |
77 CLASS="REFNAMEDIV" | |
78 ><A | |
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79 NAME="AEN4453" |
0 | 80 ></A |
81 ><H2 | |
82 >Name</H2 | |
83 >SDL_ResizeEvent -- Window resize event structure</DIV | |
84 ><DIV | |
85 CLASS="REFSECT1" | |
86 ><A | |
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87 NAME="AEN4456" |
0 | 88 ></A |
89 ><H2 | |
90 >Structure Definition</H2 | |
91 ><PRE | |
92 CLASS="PROGRAMLISTING" | |
93 >typedef struct{ | |
94 Uint8 type; | |
95 int w, h; | |
96 } SDL_ResizeEvent;</PRE | |
97 ></DIV | |
98 ><DIV | |
99 CLASS="REFSECT1" | |
100 ><A | |
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101 NAME="AEN4459" |
0 | 102 ></A |
103 ><H2 | |
104 >Structure Data</H2 | |
105 ><DIV | |
106 CLASS="INFORMALTABLE" | |
107 ><A | |
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108 NAME="AEN4461" |
0 | 109 ></A |
110 ><P | |
111 ></P | |
112 ><TABLE | |
113 BORDER="0" | |
114 CLASS="CALSTABLE" | |
115 ><TBODY | |
116 ><TR | |
117 ><TD | |
118 ALIGN="LEFT" | |
119 VALIGN="TOP" | |
120 ><TT | |
121 CLASS="STRUCTFIELD" | |
122 ><I | |
123 >type</I | |
124 ></TT | |
125 ></TD | |
126 ><TD | |
127 ALIGN="LEFT" | |
128 VALIGN="TOP" | |
129 ><TT | |
130 CLASS="LITERAL" | |
131 >SDL_VIDEORESIZE</TT | |
132 ></TD | |
133 ></TR | |
134 ><TR | |
135 ><TD | |
136 ALIGN="LEFT" | |
137 VALIGN="TOP" | |
138 ><TT | |
139 CLASS="STRUCTFIELD" | |
140 ><I | |
141 >w</I | |
142 ></TT | |
143 >, <TT | |
144 CLASS="STRUCTFIELD" | |
145 ><I | |
146 >h</I | |
147 ></TT | |
148 ></TD | |
149 ><TD | |
150 ALIGN="LEFT" | |
151 VALIGN="TOP" | |
152 >New width and height of the window</TD | |
153 ></TR | |
154 ></TBODY | |
155 ></TABLE | |
156 ><P | |
157 ></P | |
158 ></DIV | |
159 ></DIV | |
160 ><DIV | |
161 CLASS="REFSECT1" | |
162 ><A | |
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163 NAME="AEN4474" |
0 | 164 ></A |
165 ><H2 | |
166 >Description</H2 | |
167 ><P | |
168 ><SPAN | |
169 CLASS="STRUCTNAME" | |
170 >SDL_ResizeEvent</SPAN | |
171 > is a member of the <A | |
172 HREF="sdlevent.html" | |
173 ><SPAN | |
174 CLASS="STRUCTNAME" | |
175 >SDL_Event</SPAN | |
176 ></A | |
177 > union and is used when an event of type <TT | |
178 CLASS="LITERAL" | |
179 >SDL_VIDEORESIZE</TT | |
180 > is reported.</P | |
181 ><P | |
182 >When <TT | |
183 CLASS="LITERAL" | |
184 >SDL_RESIZABLE</TT | |
185 > is passed as a <TT | |
186 CLASS="PARAMETER" | |
187 ><I | |
188 >flag</I | |
189 ></TT | |
190 > to <A | |
191 HREF="sdlsetvideomode.html" | |
192 ><TT | |
193 CLASS="FUNCTION" | |
194 >SDL_SetVideoMode</TT | |
195 ></A | |
196 > the user is allowed to resize the applications window. When the window is resized an <TT | |
197 CLASS="LITERAL" | |
198 >SDL_VIDEORESIZE</TT | |
199 > is report, with the new window width and height values stored in <TT | |
200 CLASS="STRUCTFIELD" | |
201 ><I | |
202 >w</I | |
203 ></TT | |
204 > and <TT | |
205 CLASS="STRUCTFIELD" | |
206 ><I | |
207 >h</I | |
208 ></TT | |
209 >, respectively. When an <TT | |
210 CLASS="LITERAL" | |
211 >SDL_VIDEORESIZE</TT | |
212 > is recieved the window should be resized to the new dimensions using <A | |
213 HREF="sdlsetvideomode.html" | |
214 ><TT | |
215 CLASS="FUNCTION" | |
216 >SDL_SetVideoMode</TT | |
217 ></A | |
218 >.</P | |
219 ></DIV | |
220 ><DIV | |
221 CLASS="REFSECT1" | |
222 ><A | |
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223 NAME="AEN4492" |
0 | 224 ></A |
225 ><H2 | |
226 >See Also</H2 | |
227 ><P | |
228 ><A | |
229 HREF="sdlevent.html" | |
230 ><SPAN | |
231 CLASS="STRUCTNAME" | |
232 >SDL_Event</SPAN | |
233 ></A | |
234 >, | |
235 <A | |
236 HREF="sdlsetvideomode.html" | |
237 ><TT | |
238 CLASS="FUNCTION" | |
239 >SDL_SetVideoMode</TT | |
240 ></A | |
241 ></P | |
242 ></DIV | |
243 ><DIV | |
244 CLASS="NAVFOOTER" | |
245 ><HR | |
246 ALIGN="LEFT" | |
247 WIDTH="100%"><TABLE | |
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248 SUMMARY="Footer navigation table" |
0 | 249 WIDTH="100%" |
250 BORDER="0" | |
251 CELLPADDING="0" | |
252 CELLSPACING="0" | |
253 ><TR | |
254 ><TD | |
255 WIDTH="33%" | |
256 ALIGN="left" | |
257 VALIGN="top" | |
258 ><A | |
259 HREF="sdljoyballevent.html" | |
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260 ACCESSKEY="P" |
0 | 261 >Prev</A |
262 ></TD | |
263 ><TD | |
264 WIDTH="34%" | |
265 ALIGN="center" | |
266 VALIGN="top" | |
267 ><A | |
268 HREF="index.html" | |
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269 ACCESSKEY="H" |
0 | 270 >Home</A |
271 ></TD | |
272 ><TD | |
273 WIDTH="33%" | |
274 ALIGN="right" | |
275 VALIGN="top" | |
276 ><A | |
181
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277 HREF="sdlexposeevent.html" |
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278 ACCESSKEY="N" |
0 | 279 >Next</A |
280 ></TD | |
281 ></TR | |
282 ><TR | |
283 ><TD | |
284 WIDTH="33%" | |
285 ALIGN="left" | |
286 VALIGN="top" | |
287 >SDL_JoyBallEvent</TD | |
288 ><TD | |
289 WIDTH="34%" | |
290 ALIGN="center" | |
291 VALIGN="top" | |
292 ><A | |
293 HREF="eventstructures.html" | |
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294 ACCESSKEY="U" |
0 | 295 >Up</A |
296 ></TD | |
297 ><TD | |
298 WIDTH="33%" | |
299 ALIGN="right" | |
300 VALIGN="top" | |
181
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301 >SDL_ExposeEvent</TD |
0 | 302 ></TR |
303 ></TABLE | |
304 ></DIV | |
305 ></BODY | |
306 ></HTML | |
307 > |