filename | src/drivers/video_gl.c |
changeset | 854:130928a3cdcb |
prev | 736:a02d1475ccfd |
next | 1076:18c164e8aec4 |
author | nkeynes |
date | Tue Sep 09 00:51:43 2008 +0000 (15 years ago) |
permissions | -rw-r--r-- |
last change | Add general gl_window_to_system_coords function to convert window system coordinates back into something in the DC range of 640x480, update mouse events to use it |
file | annotate | diff | log | raw |
1.1 --- a/src/drivers/video_gl.c Mon Jul 14 07:44:42 2008 +00001.2 +++ b/src/drivers/video_gl.c Tue Sep 09 00:51:43 2008 +00001.3 @@ -51,6 +51,34 @@1.4 gl_texture_window( buffer->width, buffer->height, buffer->buf_id, buffer->inverted );1.5 }1.7 +/**1.8 + * Convert window coordinates to dreamcast device coords (640x480) using the1.9 + * same viewable area as gl_texture_window.1.10 + * If the coordinates are outside the viewable area, the result is -1,-1.1.11 + */1.12 +void gl_window_to_system_coords( int *x, int *y )1.13 +{1.14 + int x1=0,y1=0,x2=video_width,y2=video_height;1.15 +1.16 + int ah = video_width * 0.75;1.17 +1.18 + if( ah > video_height ) {1.19 + int w = (video_height/0.75);1.20 + x1 = (video_width - w)/2;1.21 + x2 -= x1;1.22 + } else if( ah < video_height ) {1.23 + y1 = (video_height - ah)/2;1.24 + y2 -= y1;1.25 + }1.26 + if( *x < x1 || *x >= x2 || *y < y1 || *y >= y2 ) {1.27 + *x = -1;1.28 + *y = -1;1.29 + } else {1.30 + *x = (*x - x1) * DISPLAY_WIDTH / (x2-x1);1.31 + *y = (*y - y1) * DISPLAY_HEIGHT / (y2-y1);1.32 + }1.33 +}1.34 +1.35 void gl_texture_window( int width, int height, int tex_id, gboolean inverted )1.36 {1.37 float top, bottom;
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