2 CLASS(Image) EXTENDS(Item)
3 METHOD(Image, configureImage, void(entity, string))
4 METHOD(Image, draw, void(entity))
5 METHOD(Image, toString, string(entity))
6 METHOD(Image, resizeNotify, void(entity, vector, vector, vector, vector))
7 METHOD(Image, updateAspect, void(entity))
8 METHOD(Image, initZoom, void(entity))
9 METHOD(Image, setZoom, void(entity, float, float))
10 METHOD(Image, drag_setStartPos, float(entity, vector))
11 METHOD(Image, drag, float(entity, vector))
12 ATTRIB(Image, src, string, string_null)
13 ATTRIB(Image, color, vector, '1 1 1')
14 ATTRIB(Image, forcedAspect, float, 0) // special values: -1 keep image aspect ratio, -2 keep image size but bound to the containing box, -3 always keep image size
15 ATTRIB(Image, zoomBox, float, 0) // used by forcedAspect -2 when the image is larger than the containing box
16 ATTRIB(Image, zoomFactor, float, 1)
17 ATTRIB(Image, zoomOffset, vector, '0.5 0.5 0')
18 ATTRIB(Image, zoomSnapToTheBox, float, 1) // snap the zoomed in image to the box borders when zooming/dragging it
19 ATTRIB(Image, zoomTime, float, 0)
20 ATTRIB(Image, zoomLimitedByTheBox, float, 0) // forbids zoom if image would be larger than the containing box
21 ATTRIB(Image, zoomMax, float, 0)
22 ATTRIB(Image, start_zoomOffset, vector, '0 0 0')
23 ATTRIB(Image, start_coords, vector, '0 0 0')
24 ATTRIB(Image, imgOrigin, vector, '0 0 0')
25 ATTRIB(Image, imgSize, vector, '0 0 0')
30 string Image_toString(entity me)
34 void Image_configureImage(entity me, string path)
38 void Image_initZoom(entity me)
40 me.zoomOffset = '0.5 0.5 0';
42 if (me.forcedAspect == -2)
43 me.zoomBox = -1; // calculate zoomBox at the first updateAspect call
44 if (me.zoomLimitedByTheBox)
45 me.zoomMax = -1; // calculate zoomMax at the first updateAspect call
48 void Image_draw(entity me)
50 if(me.imgSize.x > 1 || me.imgSize.y > 1)
52 draw_Picture(me.imgOrigin, me.src, me.imgSize, me.color, 1);
53 if(me.imgSize.x > 1 || me.imgSize.y > 1)
55 SUPER(Image).draw(me);
57 void Image_updateAspect(entity me)
60 if(me.size.x <= 0 || me.size.y <= 0)
62 if(me.forcedAspect == 0)
64 me.imgOrigin = '0 0 0';
70 if(me.forcedAspect < 0)
73 sz = draw_PictureSize(me.src);
74 if(sz.x <= 0 || sz.y <= 0)
76 // image is broken or doesn't exist, set the size for the placeholder image
83 asp = me.forcedAspect;
85 if(me.forcedAspect <= -2)
87 me.imgSize_x = sz.x / me.size.x;
88 me.imgSize_y = sz.y / me.size.y;
89 if(me.zoomBox < 0 && (me.imgSize.x > 1 || me.imgSize.y > 1))
91 // image larger than the containing box, zoom it out to fit into the box
92 if(me.size.x > asp * me.size.y)
93 me.zoomBox = (me.size.y * asp / me.size.x) / me.imgSize.x;
95 me.zoomBox = (me.size.x / (asp * me.size.y)) / me.imgSize.y;
96 me.zoomFactor = me.zoomBox;
101 if(me.size.x > asp * me.size.y)
103 // x too large, so center x-wise
104 me.imgSize = eY + eX * (me.size.y * asp / me.size.x);
108 // y too large, so center y-wise
109 me.imgSize = eX + eY * (me.size.x / (asp * me.size.y));
117 me.zoomMax = me.zoomBox;
120 if(me.size.x > asp * me.size.y)
121 me.zoomMax = (me.size.y * asp / me.size.x) / me.imgSize.x;
123 me.zoomMax = (me.size.x / (asp * me.size.y)) / me.imgSize.y;
127 if (me.zoomMax > 0 && me.zoomFactor > me.zoomMax)
128 me.zoomFactor = me.zoomMax;
130 me.imgSize = me.imgSize * me.zoomFactor;
132 if(me.imgSize.x > 1 || me.imgSize.y > 1)
134 if(me.zoomSnapToTheBox)
137 me.zoomOffset_x = bound(0.5/me.imgSize.x, me.zoomOffset.x, 1 - 0.5/me.imgSize.x);
139 me.zoomOffset_x = bound(1 - 0.5/me.imgSize.x, me.zoomOffset.x, 0.5/me.imgSize.x);
142 me.zoomOffset_y = bound(0.5/me.imgSize.y, me.zoomOffset.y, 1 - 0.5/me.imgSize.y);
144 me.zoomOffset_y = bound(1 - 0.5/me.imgSize.y, me.zoomOffset.y, 0.5/me.imgSize.y);
148 me.zoomOffset_x = bound(0, me.zoomOffset.x, 1);
149 me.zoomOffset_y = bound(0, me.zoomOffset.y, 1);
153 me.zoomOffset = '0.5 0.5 0';
155 me.imgOrigin_x = 0.5 - me.zoomOffset.x * me.imgSize.x;
156 me.imgOrigin_y = 0.5 - me.zoomOffset.y * me.imgSize.y;
158 float Image_drag_setStartPos(entity me, vector coords)
160 //if(me.imgSize_x > 1 || me.imgSize_y > 1) // check disabled: mousewheel zoom may start from a non-zoomed-in image
162 me.start_zoomOffset = me.zoomOffset;
163 me.start_coords = coords;
167 float Image_drag(entity me, vector coords)
169 if(me.imgSize.x > 1 || me.imgSize.y > 1)
171 me.zoomOffset_x = me.start_zoomOffset.x + (me.start_coords.x - coords.x) / me.imgSize.x;
172 me.zoomOffset_y = me.start_zoomOffset.y + (me.start_coords.y - coords.y) / me.imgSize.y;
177 void Image_setZoom(entity me, float z, float atMousePosition)
179 float prev_zoomFactor;
180 prev_zoomFactor = me.zoomFactor;
181 if (z < 0) // multiply by the current zoomFactor (but can also snap to real dimensions or to box)
184 float realSize_in_the_middle, boxSize_in_the_middle;
185 realSize_in_the_middle = ((prev_zoomFactor - 1) * (me.zoomFactor - 1) < 0);
186 boxSize_in_the_middle = (me.zoomBox > 0 && (prev_zoomFactor - me.zoomBox) * (me.zoomFactor - me.zoomBox) < 0);
187 if (realSize_in_the_middle && boxSize_in_the_middle)
189 // snap to real dimensions or to box
190 if (prev_zoomFactor < me.zoomFactor)
191 me.zoomFactor = min(1, me.zoomBox);
193 me.zoomFactor = max(1, me.zoomBox);
195 else if (realSize_in_the_middle)
196 me.zoomFactor = 1; // snap to real dimensions
197 else if (boxSize_in_the_middle)
198 me.zoomFactor = me.zoomBox; // snap to box
200 else if (z == 0) // reset (no zoom)
203 me.zoomFactor = me.zoomBox;
209 me.zoomFactor = bound(1/16, me.zoomFactor, 16);
210 if (me.zoomMax > 0 && me.zoomFactor > me.zoomMax)
211 me.zoomFactor = me.zoomMax;
212 if (prev_zoomFactor != me.zoomFactor)
217 me.zoomOffset_x = me.start_zoomOffset.x + (me.start_coords.x - 0.5) / me.imgSize.x;
218 me.zoomOffset_y = me.start_zoomOffset.y + (me.start_coords.y - 0.5) / me.imgSize.y;
219 // updateAspect will reset zoomOffset to '0.5 0.5 0' if
220 // with this zoomFactor the image will not be zoomed in
221 // (updateAspect will check the new values of imgSize).
226 void Image_resizeNotify(entity me, vector relOrigin, vector relSize, vector absOrigin, vector absSize)
228 SUPER(Image).resizeNotify(me, relOrigin, relSize, absOrigin, absSize);