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c4164bda JM |
1 | /* |
2 | * noVNC: HTML5 VNC client | |
d58f8b51 | 3 | * Copyright (C) 2012 Joel Martin |
fdedbafb | 4 | * Copyright (C) 2015 Samuel Mannehed for Cendio AB |
1d728ace | 5 | * Licensed under MPL 2.0 (see LICENSE.txt) |
c4164bda JM |
6 | * |
7 | * See README.md for usage and integration instructions. | |
8 | */ | |
c4164bda | 9 | |
1e13775b | 10 | /*jslint browser: true, white: false */ |
d3796c14 | 11 | /*global Util, Base64, changeCursor */ |
c4164bda | 12 | |
ae510306 SR |
13 | /* [module] |
14 | * import Util from "./util"; | |
15 | * import Base64 from "./base64"; | |
16 | */ | |
17 | ||
18 | /* [module] export default */ function Display(defaults) { | |
19 | this._drawCtx = null; | |
20 | this._c_forceCanvas = false; | |
21 | ||
22 | this._renderQ = []; // queue drawing actions for in-oder rendering | |
23 | ||
24 | // the full frame buffer (logical canvas) size | |
25 | this._fb_width = 0; | |
26 | this._fb_height = 0; | |
27 | ||
28 | // the size limit of the viewport (start disabled) | |
29 | this._maxWidth = 0; | |
30 | this._maxHeight = 0; | |
31 | ||
32 | // the visible "physical canvas" viewport | |
33 | this._viewportLoc = { 'x': 0, 'y': 0, 'w': 0, 'h': 0 }; | |
34 | this._cleanRect = { 'x1': 0, 'y1': 0, 'x2': -1, 'y2': -1 }; | |
35 | ||
36 | this._prevDrawStyle = ""; | |
37 | this._tile = null; | |
38 | this._tile16x16 = null; | |
39 | this._tile_x = 0; | |
40 | this._tile_y = 0; | |
41 | ||
42 | Util.set_defaults(this, defaults, { | |
43 | 'true_color': true, | |
44 | 'colourMap': [], | |
45 | 'scale': 1.0, | |
46 | 'viewport': false, | |
47 | 'render_mode': '' | |
48 | }); | |
49 | ||
50 | Util.Debug(">> Display.constructor"); | |
51 | ||
52 | if (!this._target) { | |
53 | throw new Error("Target must be set"); | |
54 | } | |
55 | ||
56 | if (typeof this._target === 'string') { | |
57 | throw new Error('target must be a DOM element'); | |
58 | } | |
59 | ||
60 | if (!this._target.getContext) { | |
61 | throw new Error("no getContext method"); | |
62 | } | |
63 | ||
64 | if (!this._drawCtx) { | |
65 | this._drawCtx = this._target.getContext('2d'); | |
66 | } | |
67 | ||
68 | Util.Debug("User Agent: " + navigator.userAgent); | |
69 | if (Util.Engine.gecko) { Util.Debug("Browser: gecko " + Util.Engine.gecko); } | |
70 | if (Util.Engine.webkit) { Util.Debug("Browser: webkit " + Util.Engine.webkit); } | |
71 | if (Util.Engine.trident) { Util.Debug("Browser: trident " + Util.Engine.trident); } | |
72 | if (Util.Engine.presto) { Util.Debug("Browser: presto " + Util.Engine.presto); } | |
73 | ||
74 | this.clear(); | |
75 | ||
76 | // Check canvas features | |
77 | if ('createImageData' in this._drawCtx) { | |
78 | this._render_mode = 'canvas rendering'; | |
79 | } else { | |
80 | throw new Error("Canvas does not support createImageData"); | |
81 | } | |
82 | ||
83 | if (this._prefer_js === null) { | |
84 | Util.Info("Prefering javascript operations"); | |
85 | this._prefer_js = true; | |
86 | } | |
87 | ||
88 | // Determine browser support for setting the cursor via data URI scheme | |
89 | if (this._cursor_uri || this._cursor_uri === null || | |
90 | this._cursor_uri === undefined) { | |
91 | this._cursor_uri = Util.browserSupportsCursorURIs(); | |
92 | } | |
93 | ||
94 | Util.Debug("<< Display.constructor"); | |
95 | }; | |
ff36b127 | 96 | |
1e13775b SR |
97 | (function () { |
98 | "use strict"; | |
e2e7c224 | 99 | |
d1800d09 SR |
100 | var SUPPORTS_IMAGEDATA_CONSTRUCTOR = false; |
101 | try { | |
6521c6ac | 102 | new ImageData(new Uint8ClampedArray(4), 1, 1); |
d1800d09 SR |
103 | SUPPORTS_IMAGEDATA_CONSTRUCTOR = true; |
104 | } catch (ex) { | |
105 | // ignore failure | |
106 | } | |
107 | ||
490d471c | 108 | |
1e13775b SR |
109 | Display.prototype = { |
110 | // Public methods | |
636be753 | 111 | viewportChangePos: function (deltaX, deltaY) { |
1e13775b | 112 | var vp = this._viewportLoc; |
a8255821 | 113 | deltaX = Math.floor(deltaX); |
114 | deltaY = Math.floor(deltaY); | |
1e13775b SR |
115 | |
116 | if (!this._viewport) { | |
1e13775b SR |
117 | deltaX = -vp.w; // clamped later of out of bounds |
118 | deltaY = -vp.h; | |
8db09746 | 119 | } |
54e7cbdf | 120 | |
1e13775b SR |
121 | var vx2 = vp.x + vp.w - 1; |
122 | var vy2 = vp.y + vp.h - 1; | |
54e7cbdf | 123 | |
1e13775b | 124 | // Position change |
54e7cbdf | 125 | |
1e13775b SR |
126 | if (deltaX < 0 && vp.x + deltaX < 0) { |
127 | deltaX = -vp.x; | |
128 | } | |
129 | if (vx2 + deltaX >= this._fb_width) { | |
130 | deltaX -= vx2 + deltaX - this._fb_width + 1; | |
131 | } | |
54e7cbdf | 132 | |
1e13775b SR |
133 | if (vp.y + deltaY < 0) { |
134 | deltaY = -vp.y; | |
135 | } | |
136 | if (vy2 + deltaY >= this._fb_height) { | |
137 | deltaY -= (vy2 + deltaY - this._fb_height + 1); | |
138 | } | |
54e7cbdf | 139 | |
1e13775b SR |
140 | if (deltaX === 0 && deltaY === 0) { |
141 | return; | |
142 | } | |
143 | Util.Debug("viewportChange deltaX: " + deltaX + ", deltaY: " + deltaY); | |
144 | ||
145 | vp.x += deltaX; | |
146 | vx2 += deltaX; | |
147 | vp.y += deltaY; | |
148 | vy2 += deltaY; | |
149 | ||
150 | // Update the clean rectangle | |
636be753 | 151 | var cr = this._cleanRect; |
1e13775b SR |
152 | if (vp.x > cr.x1) { |
153 | cr.x1 = vp.x; | |
154 | } | |
155 | if (vx2 < cr.x2) { | |
156 | cr.x2 = vx2; | |
157 | } | |
158 | if (vp.y > cr.y1) { | |
159 | cr.y1 = vp.y; | |
160 | } | |
161 | if (vy2 < cr.y2) { | |
162 | cr.y2 = vy2; | |
163 | } | |
164 | ||
165 | var x1, w; | |
166 | if (deltaX < 0) { | |
167 | // Shift viewport left, redraw left section | |
168 | x1 = 0; | |
169 | w = -deltaX; | |
170 | } else { | |
171 | // Shift viewport right, redraw right section | |
172 | x1 = vp.w - deltaX; | |
173 | w = deltaX; | |
174 | } | |
175 | ||
176 | var y1, h; | |
177 | if (deltaY < 0) { | |
178 | // Shift viewport up, redraw top section | |
179 | y1 = 0; | |
180 | h = -deltaY; | |
181 | } else { | |
182 | // Shift viewport down, redraw bottom section | |
183 | y1 = vp.h - deltaY; | |
184 | h = deltaY; | |
185 | } | |
186 | ||
1e13775b | 187 | var saveStyle = this._drawCtx.fillStyle; |
636be753 | 188 | var canvas = this._target; |
1e13775b | 189 | this._drawCtx.fillStyle = "rgb(255,255,255)"; |
a8255821 | 190 | |
191 | // Due to this bug among others [1] we need to disable the image-smoothing to | |
192 | // avoid getting a blur effect when panning. | |
193 | // | |
194 | // 1. https://bugzilla.mozilla.org/show_bug.cgi?id=1194719 | |
195 | // | |
196 | // We need to set these every time since all properties are reset | |
197 | // when the the size is changed | |
198 | if (this._drawCtx.mozImageSmoothingEnabled) { | |
199 | this._drawCtx.mozImageSmoothingEnabled = false; | |
200 | } else if (this._drawCtx.webkitImageSmoothingEnabled) { | |
201 | this._drawCtx.webkitImageSmoothingEnabled = false; | |
202 | } else if (this._drawCtx.msImageSmoothingEnabled) { | |
203 | this._drawCtx.msImageSmoothingEnabled = false; | |
204 | } else if (this._drawCtx.imageSmoothingEnabled) { | |
205 | this._drawCtx.imageSmoothingEnabled = false; | |
206 | } | |
207 | ||
208 | // Copy the valid part of the viewport to the shifted location | |
209 | this._drawCtx.drawImage(canvas, 0, 0, vp.w, vp.h, -deltaX, -deltaY, vp.w, vp.h); | |
210 | ||
1e13775b | 211 | if (deltaX !== 0) { |
1e13775b SR |
212 | this._drawCtx.fillRect(x1, 0, w, vp.h); |
213 | } | |
214 | if (deltaY !== 0) { | |
1e13775b SR |
215 | this._drawCtx.fillRect(0, y1, vp.w, h); |
216 | } | |
217 | this._drawCtx.fillStyle = saveStyle; | |
218 | }, | |
219 | ||
636be753 | 220 | viewportChangeSize: function(width, height) { |
221 | ||
fdedbafb | 222 | if (typeof(width) === "undefined" || typeof(height) === "undefined") { |
636be753 | 223 | |
224 | Util.Debug("Setting viewport to full display region"); | |
225 | width = this._fb_width; | |
226 | height = this._fb_height; | |
227 | } | |
228 | ||
229 | var vp = this._viewportLoc; | |
230 | if (vp.w !== width || vp.h !== height) { | |
231 | ||
fdedbafb | 232 | if (this._viewport) { |
233 | if (this._maxWidth !== 0 && width > this._maxWidth) { | |
234 | width = this._maxWidth; | |
235 | } | |
236 | if (this._maxHeight !== 0 && height > this._maxHeight) { | |
237 | height = this._maxHeight; | |
238 | } | |
239 | } | |
240 | ||
636be753 | 241 | var cr = this._cleanRect; |
242 | ||
243 | if (width < vp.w && cr.x2 > vp.x + width - 1) { | |
244 | cr.x2 = vp.x + width - 1; | |
245 | } | |
636be753 | 246 | if (height < vp.h && cr.y2 > vp.y + height - 1) { |
247 | cr.y2 = vp.y + height - 1; | |
248 | } | |
249 | ||
fdedbafb | 250 | vp.w = width; |
251 | vp.h = height; | |
636be753 | 252 | |
636be753 | 253 | var canvas = this._target; |
fdedbafb | 254 | if (canvas.width !== width || canvas.height !== height) { |
255 | ||
256 | // We have to save the canvas data since changing the size will clear it | |
257 | var saveImg = null; | |
258 | if (vp.w > 0 && vp.h > 0 && canvas.width > 0 && canvas.height > 0) { | |
259 | var img_width = canvas.width < vp.w ? canvas.width : vp.w; | |
260 | var img_height = canvas.height < vp.h ? canvas.height : vp.h; | |
261 | saveImg = this._drawCtx.getImageData(0, 0, img_width, img_height); | |
262 | } | |
263 | ||
6e296bfa | 264 | if (canvas.width !== width) { |
265 | canvas.width = width; | |
fdedbafb | 266 | canvas.style.width = width + 'px'; |
267 | } | |
6e296bfa | 268 | if (canvas.height !== height) { |
269 | canvas.height = height; | |
270 | canvas.style.height = height + 'px'; | |
271 | } | |
636be753 | 272 | |
fdedbafb | 273 | if (saveImg) { |
274 | this._drawCtx.putImageData(saveImg, 0, 0); | |
275 | } | |
636be753 | 276 | } |
277 | } | |
278 | }, | |
279 | ||
1e13775b SR |
280 | // Return a map of clean and dirty areas of the viewport and reset the |
281 | // tracking of clean and dirty areas | |
282 | // | |
283 | // Returns: { 'cleanBox': { 'x': x, 'y': y, 'w': w, 'h': h}, | |
284 | // 'dirtyBoxes': [{ 'x': x, 'y': y, 'w': w, 'h': h }, ...] } | |
285 | getCleanDirtyReset: function () { | |
286 | var vp = this._viewportLoc; | |
287 | var cr = this._cleanRect; | |
288 | ||
289 | var cleanBox = { 'x': cr.x1, 'y': cr.y1, | |
290 | 'w': cr.x2 - cr.x1 + 1, 'h': cr.y2 - cr.y1 + 1 }; | |
291 | ||
292 | var dirtyBoxes = []; | |
293 | if (cr.x1 >= cr.x2 || cr.y1 >= cr.y2) { | |
294 | // Whole viewport is dirty | |
295 | dirtyBoxes.push({ 'x': vp.x, 'y': vp.y, 'w': vp.w, 'h': vp.h }); | |
296 | } else { | |
297 | // Redraw dirty regions | |
298 | var vx2 = vp.x + vp.w - 1; | |
299 | var vy2 = vp.y + vp.h - 1; | |
300 | ||
301 | if (vp.x < cr.x1) { | |
302 | // left side dirty region | |
303 | dirtyBoxes.push({'x': vp.x, 'y': vp.y, | |
304 | 'w': cr.x1 - vp.x + 1, 'h': vp.h}); | |
305 | } | |
306 | if (vx2 > cr.x2) { | |
307 | // right side dirty region | |
308 | dirtyBoxes.push({'x': cr.x2 + 1, 'y': vp.y, | |
309 | 'w': vx2 - cr.x2, 'h': vp.h}); | |
310 | } | |
311 | if(vp.y < cr.y1) { | |
312 | // top/middle dirty region | |
313 | dirtyBoxes.push({'x': cr.x1, 'y': vp.y, | |
314 | 'w': cr.x2 - cr.x1 + 1, 'h': cr.y1 - vp.y}); | |
315 | } | |
316 | if (vy2 > cr.y2) { | |
317 | // bottom/middle dirty region | |
318 | dirtyBoxes.push({'x': cr.x1, 'y': cr.y2 + 1, | |
319 | 'w': cr.x2 - cr.x1 + 1, 'h': vy2 - cr.y2}); | |
320 | } | |
321 | } | |
322 | ||
323 | this._cleanRect = {'x1': vp.x, 'y1': vp.y, | |
324 | 'x2': vp.x + vp.w - 1, 'y2': vp.y + vp.h - 1}; | |
325 | ||
326 | return {'cleanBox': cleanBox, 'dirtyBoxes': dirtyBoxes}; | |
327 | }, | |
328 | ||
329 | absX: function (x) { | |
330 | return x + this._viewportLoc.x; | |
331 | }, | |
332 | ||
333 | absY: function (y) { | |
334 | return y + this._viewportLoc.y; | |
335 | }, | |
336 | ||
337 | resize: function (width, height) { | |
338 | this._prevDrawStyle = ""; | |
339 | ||
340 | this._fb_width = width; | |
341 | this._fb_height = height; | |
342 | ||
343 | this._rescale(this._scale); | |
344 | ||
636be753 | 345 | this.viewportChangeSize(); |
1e13775b SR |
346 | }, |
347 | ||
348 | clear: function () { | |
349 | if (this._logo) { | |
350 | this.resize(this._logo.width, this._logo.height); | |
351 | this.blitStringImage(this._logo.data, 0, 0); | |
352 | } else { | |
0b0b0433 SR |
353 | if (Util.Engine.trident === 6) { |
354 | // NB(directxman12): there's a bug in IE10 where we can fail to actually | |
355 | // clear the canvas here because of the resize. | |
356 | // Clearing the current viewport first fixes the issue | |
357 | this._drawCtx.clearRect(0, 0, this._viewportLoc.w, this._viewportLoc.h); | |
358 | } | |
795fca23 | 359 | this.resize(240, 20); |
1e13775b SR |
360 | this._drawCtx.clearRect(0, 0, this._viewportLoc.w, this._viewportLoc.h); |
361 | } | |
362 | ||
363 | this._renderQ = []; | |
364 | }, | |
365 | ||
f00193e0 SR |
366 | fillRect: function (x, y, width, height, color, from_queue) { |
367 | if (this._renderQ.length !== 0 && !from_queue) { | |
1578fa68 | 368 | this._renderQ_push({ |
f00193e0 SR |
369 | 'type': 'fill', |
370 | 'x': x, | |
371 | 'y': y, | |
372 | 'width': width, | |
373 | 'height': height, | |
374 | 'color': color | |
375 | }); | |
376 | } else { | |
377 | this._setFillColor(color); | |
378 | this._drawCtx.fillRect(x - this._viewportLoc.x, y - this._viewportLoc.y, width, height); | |
379 | } | |
380 | }, | |
381 | ||
382 | copyImage: function (old_x, old_y, new_x, new_y, w, h, from_queue) { | |
383 | if (this._renderQ.length !== 0 && !from_queue) { | |
1578fa68 | 384 | this._renderQ_push({ |
f00193e0 SR |
385 | 'type': 'copy', |
386 | 'old_x': old_x, | |
387 | 'old_y': old_y, | |
388 | 'x': new_x, | |
389 | 'y': new_y, | |
390 | 'width': w, | |
391 | 'height': h, | |
392 | }); | |
393 | } else { | |
394 | var x1 = old_x - this._viewportLoc.x; | |
395 | var y1 = old_y - this._viewportLoc.y; | |
396 | var x2 = new_x - this._viewportLoc.x; | |
397 | var y2 = new_y - this._viewportLoc.y; | |
1e13775b | 398 | |
f00193e0 SR |
399 | this._drawCtx.drawImage(this._target, x1, y1, w, h, x2, y2, w, h); |
400 | } | |
1e13775b SR |
401 | }, |
402 | ||
1578fa68 PO |
403 | imageRect: function(x, y, mime, arr) { |
404 | var img = new Image(); | |
405 | img.src = "data: " + mime + ";base64," + Base64.encode(arr); | |
406 | this._renderQ_push({ | |
407 | 'type': 'img', | |
408 | 'img': img, | |
409 | 'x': x, | |
410 | 'y': y | |
411 | }); | |
412 | }, | |
413 | ||
1e13775b SR |
414 | // start updating a tile |
415 | startTile: function (x, y, width, height, color) { | |
416 | this._tile_x = x; | |
417 | this._tile_y = y; | |
418 | if (width === 16 && height === 16) { | |
419 | this._tile = this._tile16x16; | |
420 | } else { | |
421 | this._tile = this._drawCtx.createImageData(width, height); | |
422 | } | |
423 | ||
424 | if (this._prefer_js) { | |
425 | var bgr; | |
426 | if (this._true_color) { | |
427 | bgr = color; | |
34d8b844 | 428 | } else { |
1e13775b | 429 | bgr = this._colourMap[color[0]]; |
34d8b844 | 430 | } |
1e13775b SR |
431 | var red = bgr[2]; |
432 | var green = bgr[1]; | |
433 | var blue = bgr[0]; | |
434 | ||
435 | var data = this._tile.data; | |
436 | for (var i = 0; i < width * height * 4; i += 4) { | |
437 | data[i] = red; | |
438 | data[i + 1] = green; | |
439 | data[i + 2] = blue; | |
440 | data[i + 3] = 255; | |
441 | } | |
442 | } else { | |
f00193e0 | 443 | this.fillRect(x, y, width, height, color, true); |
1e13775b SR |
444 | } |
445 | }, | |
446 | ||
447 | // update sub-rectangle of the current tile | |
448 | subTile: function (x, y, w, h, color) { | |
449 | if (this._prefer_js) { | |
450 | var bgr; | |
451 | if (this._true_color) { | |
452 | bgr = color; | |
453 | } else { | |
454 | bgr = this._colourMap[color[0]]; | |
455 | } | |
456 | var red = bgr[2]; | |
457 | var green = bgr[1]; | |
458 | var blue = bgr[0]; | |
459 | var xend = x + w; | |
460 | var yend = y + h; | |
461 | ||
462 | var data = this._tile.data; | |
463 | var width = this._tile.width; | |
464 | for (var j = y; j < yend; j++) { | |
465 | for (var i = x; i < xend; i++) { | |
466 | var p = (i + (j * width)) * 4; | |
467 | data[p] = red; | |
468 | data[p + 1] = green; | |
469 | data[p + 2] = blue; | |
470 | data[p + 3] = 255; | |
471 | } | |
472 | } | |
473 | } else { | |
f00193e0 | 474 | this.fillRect(this._tile_x + x, this._tile_y + y, w, h, color, true); |
1e13775b SR |
475 | } |
476 | }, | |
34d8b844 | 477 | |
1e13775b SR |
478 | // draw the current tile to the screen |
479 | finishTile: function () { | |
480 | if (this._prefer_js) { | |
481 | this._drawCtx.putImageData(this._tile, this._tile_x - this._viewportLoc.x, | |
482 | this._tile_y - this._viewportLoc.y); | |
483 | } | |
484 | // else: No-op -- already done by setSubTile | |
485 | }, | |
bc28395a | 486 | |
f00193e0 SR |
487 | blitImage: function (x, y, width, height, arr, offset, from_queue) { |
488 | if (this._renderQ.length !== 0 && !from_queue) { | |
7bc383e8 SR |
489 | // NB(directxman12): it's technically more performant here to use preallocated arrays, |
490 | // but it's a lot of extra work for not a lot of payoff -- if we're using the render queue, | |
491 | // this probably isn't getting called *nearly* as much | |
492 | var new_arr = new Uint8Array(width * height * 4); | |
493 | new_arr.set(new Uint8Array(arr.buffer, 0, new_arr.length)); | |
1578fa68 | 494 | this._renderQ_push({ |
f00193e0 | 495 | 'type': 'blit', |
7bc383e8 | 496 | 'data': new_arr, |
f00193e0 SR |
497 | 'x': x, |
498 | 'y': y, | |
499 | 'width': width, | |
500 | 'height': height, | |
501 | }); | |
502 | } else if (this._true_color) { | |
1e13775b SR |
503 | this._bgrxImageData(x, y, this._viewportLoc.x, this._viewportLoc.y, width, height, arr, offset); |
504 | } else { | |
505 | this._cmapImageData(x, y, this._viewportLoc.x, this._viewportLoc.y, width, height, arr, offset); | |
506 | } | |
507 | }, | |
2c2b492c | 508 | |
f00193e0 SR |
509 | blitRgbImage: function (x, y , width, height, arr, offset, from_queue) { |
510 | if (this._renderQ.length !== 0 && !from_queue) { | |
7bc383e8 SR |
511 | // NB(directxman12): it's technically more performant here to use preallocated arrays, |
512 | // but it's a lot of extra work for not a lot of payoff -- if we're using the render queue, | |
513 | // this probably isn't getting called *nearly* as much | |
6024677f | 514 | var new_arr = new Uint8Array(width * height * 3); |
7bc383e8 | 515 | new_arr.set(new Uint8Array(arr.buffer, 0, new_arr.length)); |
1578fa68 | 516 | this._renderQ_push({ |
f00193e0 | 517 | 'type': 'blitRgb', |
7bc383e8 | 518 | 'data': new_arr, |
f00193e0 SR |
519 | 'x': x, |
520 | 'y': y, | |
521 | 'width': width, | |
522 | 'height': height, | |
523 | }); | |
524 | } else if (this._true_color) { | |
1e13775b SR |
525 | this._rgbImageData(x, y, this._viewportLoc.x, this._viewportLoc.y, width, height, arr, offset); |
526 | } else { | |
527 | // probably wrong? | |
528 | this._cmapImageData(x, y, this._viewportLoc.x, this._viewportLoc.y, width, height, arr, offset); | |
529 | } | |
530 | }, | |
531 | ||
f00193e0 SR |
532 | blitRgbxImage: function (x, y, width, height, arr, offset, from_queue) { |
533 | if (this._renderQ.length !== 0 && !from_queue) { | |
7bc383e8 | 534 | // NB(directxman12): it's technically more performant here to use preallocated arrays, |
f00193e0 SR |
535 | // but it's a lot of extra work for not a lot of payoff -- if we're using the render queue, |
536 | // this probably isn't getting called *nearly* as much | |
537 | var new_arr = new Uint8Array(width * height * 4); | |
538 | new_arr.set(new Uint8Array(arr.buffer, 0, new_arr.length)); | |
1578fa68 | 539 | this._renderQ_push({ |
f00193e0 SR |
540 | 'type': 'blitRgbx', |
541 | 'data': new_arr, | |
542 | 'x': x, | |
543 | 'y': y, | |
544 | 'width': width, | |
545 | 'height': height, | |
546 | }); | |
547 | } else { | |
548 | this._rgbxImageData(x, y, this._viewportLoc.x, this._viewportLoc.y, width, height, arr, offset); | |
549 | } | |
d1800d09 SR |
550 | }, |
551 | ||
1e13775b SR |
552 | blitStringImage: function (str, x, y) { |
553 | var img = new Image(); | |
554 | img.onload = function () { | |
555 | this._drawCtx.drawImage(img, x - this._viewportLoc.x, y - this._viewportLoc.y); | |
556 | }.bind(this); | |
557 | img.src = str; | |
558 | return img; // for debugging purposes | |
559 | }, | |
560 | ||
561 | // wrap ctx.drawImage but relative to viewport | |
562 | drawImage: function (img, x, y) { | |
563 | this._drawCtx.drawImage(img, x - this._viewportLoc.x, y - this._viewportLoc.y); | |
564 | }, | |
565 | ||
1e13775b SR |
566 | changeCursor: function (pixels, mask, hotx, hoty, w, h) { |
567 | if (this._cursor_uri === false) { | |
568 | Util.Warn("changeCursor called but no cursor data URI support"); | |
569 | return; | |
570 | } | |
d3796c14 | 571 | |
1e13775b SR |
572 | if (this._true_color) { |
573 | Display.changeCursor(this._target, pixels, mask, hotx, hoty, w, h); | |
574 | } else { | |
575 | Display.changeCursor(this._target, pixels, mask, hotx, hoty, w, h, this._colourMap); | |
576 | } | |
577 | }, | |
578 | ||
579 | defaultCursor: function () { | |
580 | this._target.style.cursor = "default"; | |
581 | }, | |
582 | ||
b804b3e4 | 583 | disableLocalCursor: function () { |
584 | this._target.style.cursor = "none"; | |
585 | }, | |
586 | ||
fdedbafb | 587 | clippingDisplay: function () { |
588 | var vp = this._viewportLoc; | |
589 | ||
590 | var fbClip = this._fb_width > vp.w || this._fb_height > vp.h; | |
591 | var limitedVp = this._maxWidth !== 0 && this._maxHeight !== 0; | |
592 | var clipping = false; | |
593 | ||
594 | if (limitedVp) { | |
595 | clipping = vp.w > this._maxWidth || vp.h > this._maxHeight; | |
596 | } | |
597 | ||
598 | return fbClip || (limitedVp && clipping); | |
636be753 | 599 | }, |
600 | ||
1e13775b SR |
601 | // Overridden getters/setters |
602 | get_context: function () { | |
603 | return this._drawCtx; | |
604 | }, | |
605 | ||
606 | set_scale: function (scale) { | |
607 | this._rescale(scale); | |
608 | }, | |
609 | ||
610 | set_width: function (w) { | |
636be753 | 611 | this._fb_width = w; |
1e13775b SR |
612 | }, |
613 | get_width: function () { | |
614 | return this._fb_width; | |
615 | }, | |
616 | ||
617 | set_height: function (h) { | |
636be753 | 618 | this._fb_height = h; |
1e13775b SR |
619 | }, |
620 | get_height: function () { | |
621 | return this._fb_height; | |
622 | }, | |
623 | ||
72747869 SR |
624 | autoscale: function (containerWidth, containerHeight, downscaleOnly) { |
625 | var targetAspectRatio = containerWidth / containerHeight; | |
626 | var fbAspectRatio = this._fb_width / this._fb_height; | |
9a23006e | 627 | |
72747869 SR |
628 | var scaleRatio; |
629 | if (fbAspectRatio >= targetAspectRatio) { | |
630 | scaleRatio = containerWidth / this._fb_width; | |
631 | } else { | |
632 | scaleRatio = containerHeight / this._fb_height; | |
1e13775b | 633 | } |
9a23006e | 634 | |
72747869 SR |
635 | var targetW, targetH; |
636 | if (scaleRatio > 1.0 && downscaleOnly) { | |
637 | targetW = this._fb_width; | |
638 | targetH = this._fb_height; | |
639 | scaleRatio = 1.0; | |
640 | } else if (fbAspectRatio >= targetAspectRatio) { | |
641 | targetW = containerWidth; | |
642 | targetH = Math.round(containerWidth / fbAspectRatio); | |
643 | } else { | |
644 | targetW = Math.round(containerHeight * fbAspectRatio); | |
645 | targetH = containerHeight; | |
1e13775b | 646 | } |
9a23006e | 647 | |
72747869 SR |
648 | // NB(directxman12): If you set the width directly, or set the |
649 | // style width to a number, the canvas is cleared. | |
650 | // However, if you set the style width to a string | |
651 | // ('NNNpx'), the canvas is scaled without clearing. | |
652 | this._target.style.width = targetW + 'px'; | |
653 | this._target.style.height = targetH + 'px'; | |
654 | ||
655 | this._scale = scaleRatio; | |
656 | ||
657 | return scaleRatio; // so that the mouse, etc scale can be set | |
658 | }, | |
1e13775b | 659 | |
72747869 SR |
660 | // Private Methods |
661 | _rescale: function (factor) { | |
1e13775b | 662 | this._scale = factor; |
72747869 | 663 | |
fdedbafb | 664 | var w; |
665 | var h; | |
666 | ||
667 | if (this._viewport && | |
668 | this._maxWidth !== 0 && this._maxHeight !== 0) { | |
669 | w = Math.min(this._fb_width, this._maxWidth); | |
670 | h = Math.min(this._fb_height, this._maxHeight); | |
671 | } else { | |
672 | w = this._fb_width; | |
673 | h = this._fb_height; | |
674 | } | |
675 | ||
676 | this._target.style.width = Math.round(factor * w) + 'px'; | |
677 | this._target.style.height = Math.round(factor * h) + 'px'; | |
1e13775b | 678 | }, |
67b4e987 | 679 | |
1e13775b SR |
680 | _setFillColor: function (color) { |
681 | var bgr; | |
682 | if (this._true_color) { | |
683 | bgr = color; | |
9a23006e | 684 | } else { |
a369a80c | 685 | bgr = this._colourMap[color]; |
1e13775b SR |
686 | } |
687 | ||
688 | var newStyle = 'rgb(' + bgr[2] + ',' + bgr[1] + ',' + bgr[0] + ')'; | |
689 | if (newStyle !== this._prevDrawStyle) { | |
690 | this._drawCtx.fillStyle = newStyle; | |
691 | this._prevDrawStyle = newStyle; | |
692 | } | |
693 | }, | |
694 | ||
695 | _rgbImageData: function (x, y, vx, vy, width, height, arr, offset) { | |
696 | var img = this._drawCtx.createImageData(width, height); | |
697 | var data = img.data; | |
698 | for (var i = 0, j = offset; i < width * height * 4; i += 4, j += 3) { | |
699 | data[i] = arr[j]; | |
700 | data[i + 1] = arr[j + 1]; | |
701 | data[i + 2] = arr[j + 2]; | |
702 | data[i + 3] = 255; // Alpha | |
703 | } | |
704 | this._drawCtx.putImageData(img, x - vx, y - vy); | |
705 | }, | |
706 | ||
707 | _bgrxImageData: function (x, y, vx, vy, width, height, arr, offset) { | |
708 | var img = this._drawCtx.createImageData(width, height); | |
709 | var data = img.data; | |
710 | for (var i = 0, j = offset; i < width * height * 4; i += 4, j += 4) { | |
711 | data[i] = arr[j + 2]; | |
712 | data[i + 1] = arr[j + 1]; | |
713 | data[i + 2] = arr[j]; | |
714 | data[i + 3] = 255; // Alpha | |
715 | } | |
716 | this._drawCtx.putImageData(img, x - vx, y - vy); | |
717 | }, | |
718 | ||
d1800d09 SR |
719 | _rgbxImageData: function (x, y, vx, vy, width, height, arr, offset) { |
720 | // NB(directxman12): arr must be an Type Array view | |
d1800d09 SR |
721 | var img; |
722 | if (SUPPORTS_IMAGEDATA_CONSTRUCTOR) { | |
f00193e0 | 723 | img = new ImageData(new Uint8ClampedArray(arr.buffer, arr.byteOffset, width * height * 4), width, height); |
d1800d09 SR |
724 | } else { |
725 | img = this._drawCtx.createImageData(width, height); | |
f00193e0 | 726 | img.data.set(new Uint8ClampedArray(arr.buffer, arr.byteOffset, width * height * 4)); |
d1800d09 SR |
727 | } |
728 | this._drawCtx.putImageData(img, x - vx, y - vy); | |
729 | }, | |
730 | ||
1e13775b SR |
731 | _cmapImageData: function (x, y, vx, vy, width, height, arr, offset) { |
732 | var img = this._drawCtx.createImageData(width, height); | |
733 | var data = img.data; | |
734 | var cmap = this._colourMap; | |
735 | for (var i = 0, j = offset; i < width * height * 4; i += 4, j++) { | |
736 | var bgr = cmap[arr[j]]; | |
737 | data[i] = bgr[2]; | |
738 | data[i + 1] = bgr[1]; | |
739 | data[i + 2] = bgr[0]; | |
740 | data[i + 3] = 255; // Alpha | |
741 | } | |
742 | this._drawCtx.putImageData(img, x - vx, y - vy); | |
743 | }, | |
744 | ||
1578fa68 PO |
745 | _renderQ_push: function (action) { |
746 | this._renderQ.push(action); | |
747 | if (this._renderQ.length === 1) { | |
748 | // If this can be rendered immediately it will be, otherwise | |
bb6965f2 | 749 | // the scanner will wait for the relevant event |
1578fa68 PO |
750 | this._scan_renderQ(); |
751 | } | |
752 | }, | |
753 | ||
bb6965f2 PO |
754 | _resume_renderQ: function() { |
755 | // "this" is the object that is ready, not the | |
756 | // display object | |
757 | this.removeEventListener('load', this._noVNC_display._resume_renderQ); | |
758 | this._noVNC_display._scan_renderQ(); | |
759 | }, | |
760 | ||
1e13775b SR |
761 | _scan_renderQ: function () { |
762 | var ready = true; | |
763 | while (ready && this._renderQ.length > 0) { | |
764 | var a = this._renderQ[0]; | |
765 | switch (a.type) { | |
766 | case 'copy': | |
f00193e0 | 767 | this.copyImage(a.old_x, a.old_y, a.x, a.y, a.width, a.height, true); |
1e13775b SR |
768 | break; |
769 | case 'fill': | |
f00193e0 | 770 | this.fillRect(a.x, a.y, a.width, a.height, a.color, true); |
1e13775b SR |
771 | break; |
772 | case 'blit': | |
f00193e0 | 773 | this.blitImage(a.x, a.y, a.width, a.height, a.data, 0, true); |
1e13775b SR |
774 | break; |
775 | case 'blitRgb': | |
f00193e0 | 776 | this.blitRgbImage(a.x, a.y, a.width, a.height, a.data, 0, true); |
1e13775b | 777 | break; |
d1800d09 | 778 | case 'blitRgbx': |
f00193e0 | 779 | this.blitRgbxImage(a.x, a.y, a.width, a.height, a.data, 0, true); |
1e13775b SR |
780 | break; |
781 | case 'img': | |
782 | if (a.img.complete) { | |
783 | this.drawImage(a.img, a.x, a.y); | |
784 | } else { | |
bb6965f2 PO |
785 | a.img._noVNC_display = this; |
786 | a.img.addEventListener('load', this._resume_renderQ); | |
1e13775b SR |
787 | // We need to wait for this image to 'load' |
788 | // to keep things in-order | |
789 | ready = false; | |
790 | } | |
791 | break; | |
792 | } | |
793 | ||
794 | if (ready) { | |
795 | this._renderQ.shift(); | |
796 | } | |
797 | } | |
1e13775b SR |
798 | }, |
799 | }; | |
800 | ||
801 | Util.make_properties(Display, [ | |
802 | ['target', 'wo', 'dom'], // Canvas element for rendering | |
803 | ['context', 'ro', 'raw'], // Canvas 2D context for rendering (read-only) | |
804 | ['logo', 'rw', 'raw'], // Logo to display when cleared: {"width": w, "height": h, "data": data} | |
805 | ['true_color', 'rw', 'bool'], // Use true-color pixel data | |
806 | ['colourMap', 'rw', 'arr'], // Colour map array (when not true-color) | |
807 | ['scale', 'rw', 'float'], // Display area scale factor 0.0 - 1.0 | |
fdedbafb | 808 | ['viewport', 'rw', 'bool'], // Use viewport clipping |
1e13775b SR |
809 | ['width', 'rw', 'int'], // Display area width |
810 | ['height', 'rw', 'int'], // Display area height | |
fdedbafb | 811 | ['maxWidth', 'rw', 'int'], // Viewport max width (0 if disabled) |
812 | ['maxHeight', 'rw', 'int'], // Viewport max height (0 if disabled) | |
1e13775b SR |
813 | |
814 | ['render_mode', 'ro', 'str'], // Canvas rendering mode (read-only) | |
815 | ||
816 | ['prefer_js', 'rw', 'str'], // Prefer Javascript over canvas methods | |
817 | ['cursor_uri', 'rw', 'raw'] // Can we render cursor using data URI | |
818 | ]); | |
819 | ||
820 | // Class Methods | |
821 | Display.changeCursor = function (target, pixels, mask, hotx, hoty, w0, h0, cmap) { | |
822 | var w = w0; | |
823 | var h = h0; | |
824 | if (h < w) { | |
825 | h = w; // increase h to make it square | |
826 | } else { | |
827 | w = h; // increase w to make it square | |
828 | } | |
829 | ||
830 | var cur = []; | |
831 | ||
832 | // Push multi-byte little-endian values | |
833 | cur.push16le = function (num) { | |
834 | this.push(num & 0xFF, (num >> 8) & 0xFF); | |
835 | }; | |
836 | cur.push32le = function (num) { | |
837 | this.push(num & 0xFF, | |
838 | (num >> 8) & 0xFF, | |
839 | (num >> 16) & 0xFF, | |
840 | (num >> 24) & 0xFF); | |
841 | }; | |
842 | ||
843 | var IHDRsz = 40; | |
844 | var RGBsz = w * h * 4; | |
845 | var XORsz = Math.ceil((w * h) / 8.0); | |
846 | var ANDsz = Math.ceil((w * h) / 8.0); | |
847 | ||
848 | cur.push16le(0); // 0: Reserved | |
849 | cur.push16le(2); // 2: .CUR type | |
850 | cur.push16le(1); // 4: Number of images, 1 for non-animated ico | |
851 | ||
852 | // Cursor #1 header (ICONDIRENTRY) | |
853 | cur.push(w); // 6: width | |
854 | cur.push(h); // 7: height | |
855 | cur.push(0); // 8: colors, 0 -> true-color | |
856 | cur.push(0); // 9: reserved | |
857 | cur.push16le(hotx); // 10: hotspot x coordinate | |
858 | cur.push16le(hoty); // 12: hotspot y coordinate | |
859 | cur.push32le(IHDRsz + RGBsz + XORsz + ANDsz); | |
860 | // 14: cursor data byte size | |
861 | cur.push32le(22); // 18: offset of cursor data in the file | |
862 | ||
863 | // Cursor #1 InfoHeader (ICONIMAGE/BITMAPINFO) | |
864 | cur.push32le(IHDRsz); // 22: InfoHeader size | |
865 | cur.push32le(w); // 26: Cursor width | |
866 | cur.push32le(h * 2); // 30: XOR+AND height | |
867 | cur.push16le(1); // 34: number of planes | |
868 | cur.push16le(32); // 36: bits per pixel | |
869 | cur.push32le(0); // 38: Type of compression | |
870 | ||
871 | cur.push32le(XORsz + ANDsz); | |
872 | // 42: Size of Image | |
873 | cur.push32le(0); // 46: reserved | |
874 | cur.push32le(0); // 50: reserved | |
875 | cur.push32le(0); // 54: reserved | |
876 | cur.push32le(0); // 58: reserved | |
877 | ||
878 | // 62: color data (RGBQUAD icColors[]) | |
879 | var y, x; | |
880 | for (y = h - 1; y >= 0; y--) { | |
881 | for (x = 0; x < w; x++) { | |
882 | if (x >= w0 || y >= h0) { | |
883 | cur.push(0); // blue | |
884 | cur.push(0); // green | |
885 | cur.push(0); // red | |
886 | cur.push(0); // alpha | |
6f4cbb3f | 887 | } else { |
1e13775b SR |
888 | var idx = y * Math.ceil(w0 / 8) + Math.floor(x / 8); |
889 | var alpha = (mask[idx] << (x % 8)) & 0x80 ? 255 : 0; | |
890 | if (cmap) { | |
891 | idx = (w0 * y) + x; | |
892 | var rgb = cmap[pixels[idx]]; | |
893 | cur.push(rgb[2]); // blue | |
894 | cur.push(rgb[1]); // green | |
895 | cur.push(rgb[0]); // red | |
896 | cur.push(alpha); // alpha | |
ec31f82e SR |
897 | } else { |
898 | idx = ((w0 * y) + x) * 4; | |
899 | cur.push(pixels[idx + 2]); // blue | |
900 | cur.push(pixels[idx + 1]); // green | |
901 | cur.push(pixels[idx]); // red | |
902 | cur.push(alpha); // alpha | |
1e13775b | 903 | } |
6f4cbb3f | 904 | } |
2c2b492c JM |
905 | } |
906 | } | |
2c2b492c | 907 | |
1e13775b SR |
908 | // XOR/bitmask data (BYTE icXOR[]) |
909 | // (ignored, just needs to be the right size) | |
910 | for (y = 0; y < h; y++) { | |
911 | for (x = 0; x < Math.ceil(w / 8); x++) { | |
912 | cur.push(0); | |
913 | } | |
9a23006e | 914 | } |
9a23006e | 915 | |
1e13775b SR |
916 | // AND/bitmask data (BYTE icAND[]) |
917 | // (ignored, just needs to be the right size) | |
918 | for (y = 0; y < h; y++) { | |
919 | for (x = 0; x < Math.ceil(w / 8); x++) { | |
920 | cur.push(0); | |
921 | } | |
2c2b492c | 922 | } |
2c2b492c | 923 | |
1e13775b SR |
924 | var url = 'data:image/x-icon;base64,' + Base64.encode(cur); |
925 | target.style.cursor = 'url(' + url + ')' + hotx + ' ' + hoty + ', default'; | |
926 | }; | |
927 | })(); |