/
vm.display.browser.js
435 lines (434 loc) · 21.5 KB
/
vm.display.browser.js
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"use strict";
/*
* Copyright (c) 2013-2024 Vanessa Freudenberg
*
* 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
* AUTHORS OR COPYRIGHT HOLDERS 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.
*/
Object.extend(Squeak.Primitives.prototype,
'display', {
initDisplay: function(display) {
this.display = display;
this.display.vm = this.vm;
this.indexedColors = [
0xFFFFFFFF, 0xFF000001, 0xFFFFFFFF, 0xFF808080, 0xFFFF0000, 0xFF00FF00, 0xFF0000FF, 0xFF00FFFF,
0xFFFFFF00, 0xFFFF00FF, 0xFF202020, 0xFF404040, 0xFF606060, 0xFF9F9F9F, 0xFFBFBFBF, 0xFFDFDFDF,
0xFF080808, 0xFF101010, 0xFF181818, 0xFF282828, 0xFF303030, 0xFF383838, 0xFF484848, 0xFF505050,
0xFF585858, 0xFF686868, 0xFF707070, 0xFF787878, 0xFF878787, 0xFF8F8F8F, 0xFF979797, 0xFFA7A7A7,
0xFFAFAFAF, 0xFFB7B7B7, 0xFFC7C7C7, 0xFFCFCFCF, 0xFFD7D7D7, 0xFFE7E7E7, 0xFFEFEFEF, 0xFFF7F7F7,
0xFF000001, 0xFF003300, 0xFF006600, 0xFF009900, 0xFF00CC00, 0xFF00FF00, 0xFF000033, 0xFF003333,
0xFF006633, 0xFF009933, 0xFF00CC33, 0xFF00FF33, 0xFF000066, 0xFF003366, 0xFF006666, 0xFF009966,
0xFF00CC66, 0xFF00FF66, 0xFF000099, 0xFF003399, 0xFF006699, 0xFF009999, 0xFF00CC99, 0xFF00FF99,
0xFF0000CC, 0xFF0033CC, 0xFF0066CC, 0xFF0099CC, 0xFF00CCCC, 0xFF00FFCC, 0xFF0000FF, 0xFF0033FF,
0xFF0066FF, 0xFF0099FF, 0xFF00CCFF, 0xFF00FFFF, 0xFF330000, 0xFF333300, 0xFF336600, 0xFF339900,
0xFF33CC00, 0xFF33FF00, 0xFF330033, 0xFF333333, 0xFF336633, 0xFF339933, 0xFF33CC33, 0xFF33FF33,
0xFF330066, 0xFF333366, 0xFF336666, 0xFF339966, 0xFF33CC66, 0xFF33FF66, 0xFF330099, 0xFF333399,
0xFF336699, 0xFF339999, 0xFF33CC99, 0xFF33FF99, 0xFF3300CC, 0xFF3333CC, 0xFF3366CC, 0xFF3399CC,
0xFF33CCCC, 0xFF33FFCC, 0xFF3300FF, 0xFF3333FF, 0xFF3366FF, 0xFF3399FF, 0xFF33CCFF, 0xFF33FFFF,
0xFF660000, 0xFF663300, 0xFF666600, 0xFF669900, 0xFF66CC00, 0xFF66FF00, 0xFF660033, 0xFF663333,
0xFF666633, 0xFF669933, 0xFF66CC33, 0xFF66FF33, 0xFF660066, 0xFF663366, 0xFF666666, 0xFF669966,
0xFF66CC66, 0xFF66FF66, 0xFF660099, 0xFF663399, 0xFF666699, 0xFF669999, 0xFF66CC99, 0xFF66FF99,
0xFF6600CC, 0xFF6633CC, 0xFF6666CC, 0xFF6699CC, 0xFF66CCCC, 0xFF66FFCC, 0xFF6600FF, 0xFF6633FF,
0xFF6666FF, 0xFF6699FF, 0xFF66CCFF, 0xFF66FFFF, 0xFF990000, 0xFF993300, 0xFF996600, 0xFF999900,
0xFF99CC00, 0xFF99FF00, 0xFF990033, 0xFF993333, 0xFF996633, 0xFF999933, 0xFF99CC33, 0xFF99FF33,
0xFF990066, 0xFF993366, 0xFF996666, 0xFF999966, 0xFF99CC66, 0xFF99FF66, 0xFF990099, 0xFF993399,
0xFF996699, 0xFF999999, 0xFF99CC99, 0xFF99FF99, 0xFF9900CC, 0xFF9933CC, 0xFF9966CC, 0xFF9999CC,
0xFF99CCCC, 0xFF99FFCC, 0xFF9900FF, 0xFF9933FF, 0xFF9966FF, 0xFF9999FF, 0xFF99CCFF, 0xFF99FFFF,
0xFFCC0000, 0xFFCC3300, 0xFFCC6600, 0xFFCC9900, 0xFFCCCC00, 0xFFCCFF00, 0xFFCC0033, 0xFFCC3333,
0xFFCC6633, 0xFFCC9933, 0xFFCCCC33, 0xFFCCFF33, 0xFFCC0066, 0xFFCC3366, 0xFFCC6666, 0xFFCC9966,
0xFFCCCC66, 0xFFCCFF66, 0xFFCC0099, 0xFFCC3399, 0xFFCC6699, 0xFFCC9999, 0xFFCCCC99, 0xFFCCFF99,
0xFFCC00CC, 0xFFCC33CC, 0xFFCC66CC, 0xFFCC99CC, 0xFFCCCCCC, 0xFFCCFFCC, 0xFFCC00FF, 0xFFCC33FF,
0xFFCC66FF, 0xFFCC99FF, 0xFFCCCCFF, 0xFFCCFFFF, 0xFFFF0000, 0xFFFF3300, 0xFFFF6600, 0xFFFF9900,
0xFFFFCC00, 0xFFFFFF00, 0xFFFF0033, 0xFFFF3333, 0xFFFF6633, 0xFFFF9933, 0xFFFFCC33, 0xFFFFFF33,
0xFFFF0066, 0xFFFF3366, 0xFFFF6666, 0xFFFF9966, 0xFFFFCC66, 0xFFFFFF66, 0xFFFF0099, 0xFFFF3399,
0xFFFF6699, 0xFFFF9999, 0xFFFFCC99, 0xFFFFFF99, 0xFFFF00CC, 0xFFFF33CC, 0xFFFF66CC, 0xFFFF99CC,
0xFFFFCCCC, 0xFFFFFFCC, 0xFFFF00FF, 0xFFFF33FF, 0xFFFF66FF, 0xFFFF99FF, 0xFFFFCCFF, 0xFFFFFFFF];
},
primitiveBeCursor: function(argCount) {
if (this.display.cursorCanvas) {
var cursorForm = this.loadForm(this.stackNonInteger(argCount), true),
maskForm = argCount === 1 ? this.loadForm(this.stackNonInteger(0)) : null;
if (!this.success || !cursorForm) return false;
var cursorCanvas = this.display.cursorCanvas,
context = cursorCanvas.getContext("2d"),
bounds = {left: 0, top: 0, right: cursorForm.width, bottom: cursorForm.height};
cursorCanvas.width = cursorForm.width;
cursorCanvas.height = cursorForm.height;
if (cursorForm.depth === 1) {
if (maskForm) {
cursorForm = this.cursorMergeMask(cursorForm, maskForm);
this.showForm(context, cursorForm, bounds, [0x00000000, 0xFF0000FF, 0xFFFFFFFF, 0xFF000000]);
} else {
this.showForm(context, cursorForm, bounds, [0x00000000, 0xFF000000]);
}
} else {
this.showForm(context, cursorForm, bounds, true);
}
var scale = this.display.scale || 1.0;
if (cursorForm.width <= 16 && cursorForm.height <= 16) {
scale = 1.0;
}
cursorCanvas.style.width = Math.round(cursorCanvas.width * scale) + "px";
cursorCanvas.style.height = Math.round(cursorCanvas.height * scale) + "px";
this.display.cursorOffsetX = cursorForm.offsetX * scale|0;
this.display.cursorOffsetY = cursorForm.offsetY * scale|0;
}
this.vm.popN(argCount);
return true;
},
cursorMergeMask: function(cursor, mask) {
// make 2-bit form from cursor and mask 1-bit forms
var bits = new Uint32Array(16);
for (var y = 0; y < 16; y++) {
var c = cursor.bits[y],
m = mask.bits[y],
bit = 0x80000000,
merged = 0;
for (var x = 0; x < 16; x++) {
merged = merged | ((m & bit) >> x) | ((c & bit) >> (x + 1));
bit = bit >>> 1;
}
bits[y] = merged;
}
return {
obj: cursor.obj, bits: bits,
depth: 2, width: 16, height: 16,
offsetX: cursor.offsetX, offsetY: cursor.offsetY,
msb: true, pixPerWord: 16, pitch: 1,
}
},
primitiveBeDisplay: function(argCount) {
var displayObj = this.vm.stackValue(0);
this.vm.specialObjects[Squeak.splOb_TheDisplay] = displayObj;
this.vm.popN(argCount); // return self
return true;
},
primitiveReverseDisplay: function(argCount) {
this.reverseDisplay = !this.reverseDisplay;
this.redrawDisplay();
if (this.display.cursorCanvas) {
var canvas = this.display.cursorCanvas,
context = canvas.getContext("2d"),
image = context.getImageData(0, 0, canvas.width, canvas.height),
data = new Uint32Array(image.data.buffer);
for (var i = 0; i < data.length; i++)
data[i] = data[i] ^ 0x00FFFFFF;
context.putImageData(image, 0, 0);
}
return true;
},
primitiveShowDisplayRect: function(argCount) {
// Force the given rectangular section of the Display to be copied to the screen.
var rect = {
left: this.stackInteger(3),
top: this.stackInteger(1),
right: this.stackInteger(2),
bottom: this.stackInteger(0),
};
if (!this.success) return false;
this.redrawDisplay(rect);
this.vm.popN(argCount);
return true;
},
redrawDisplay: function(rect) {
var theDisplay = this.theDisplay(),
bounds = {left: 0, top: 0, right: theDisplay.width, bottom: theDisplay.height};
if (rect) {
if (rect.left > bounds.left) bounds.left = rect.left;
if (rect.right < bounds.right) bounds.right = rect.right;
if (rect.top > bounds.top) bounds.top = rect.top;
if (rect.bottom < bounds.bottom) bounds.bottom = rect.bottom;
}
if (bounds.left < bounds.right && bounds.top < bounds.bottom)
this.displayUpdate(theDisplay, bounds);
},
showForm: function(ctx, form, rect, cursorColors) {
if (!rect) return;
var srcX = rect.left,
srcY = rect.top,
srcW = rect.right - srcX,
srcH = rect.bottom - srcY,
pixels = ctx.createImageData(srcW, srcH),
pixelData = pixels.data;
if (!pixelData.buffer) { // mobile IE uses a different data-structure
pixelData = new Uint8Array(srcW * srcH * 4);
}
var dest = new Uint32Array(pixelData.buffer);
switch (form.depth) {
case 1:
case 2:
case 4:
case 8:
var colors = cursorColors || this.swappedColors;
if (!colors) {
colors = [];
for (var i = 0; i < 256; i++) {
var argb = this.indexedColors[i],
abgr = (argb & 0xFF00FF00) // green and alpha
+ ((argb & 0x00FF0000) >> 16) // shift red down
+ ((argb & 0x000000FF) << 16); // shift blue up
colors[i] = abgr;
}
this.swappedColors = colors;
}
if (this.reverseDisplay) {
if (cursorColors) {
colors = cursorColors.map(function(c){return c ^ 0x00FFFFFF});
} else {
if (!this.reversedColors)
this.reversedColors = colors.map(function(c){return c ^ 0x00FFFFFF});
colors = this.reversedColors;
}
}
var mask = (1 << form.depth) - 1;
var leftSrcShift = 32 - (srcX % form.pixPerWord + 1) * form.depth;
for (var y = 0; y < srcH; y++) {
var srcIndex = form.pitch * srcY + (srcX / form.pixPerWord | 0);
var srcShift = leftSrcShift;
var src = form.bits[srcIndex];
var dstIndex = pixels.width * y;
for (var x = 0; x < srcW; x++) {
dest[dstIndex++] = colors[(src >>> srcShift) & mask];
if ((srcShift -= form.depth) < 0) {
srcShift = 32 - form.depth;
src = form.bits[++srcIndex];
}
}
srcY++;
};
break;
case 16:
var leftSrcShift = srcX % 2 ? 0 : 16;
for (var y = 0; y < srcH; y++) {
var srcIndex = form.pitch * srcY + (srcX / 2 | 0);
var srcShift = leftSrcShift;
var src = form.bits[srcIndex];
var dstIndex = pixels.width * y;
for (var x = 0; x < srcW; x++) {
var rgb = src >>> srcShift;
dest[dstIndex++] =
((rgb & 0x7C00) >> 7) // shift red down 2*5, up 0*8 + 3
+ ((rgb & 0x03E0) << 6) // shift green down 1*5, up 1*8 + 3
+ ((rgb & 0x001F) << 19) // shift blue down 0*5, up 2*8 + 3
+ 0xFF000000; // set alpha to opaque
if ((srcShift -= 16) < 0) {
srcShift = 16;
src = form.bits[++srcIndex];
}
}
srcY++;
};
break;
case 32:
var opaque = cursorColors ? 0 : 0xFF000000; // keep alpha for cursors
for (var y = 0; y < srcH; y++) {
var srcIndex = form.pitch * srcY + srcX;
var dstIndex = pixels.width * y;
for (var x = 0; x < srcW; x++) {
var argb = form.bits[srcIndex++]; // convert ARGB -> ABGR
var abgr = (argb & 0xFF00FF00) // green and alpha is okay
| ((argb & 0x00FF0000) >> 16) // shift red down
| ((argb & 0x000000FF) << 16) // shift blue up
| opaque; // set alpha to opaque
dest[dstIndex++] = abgr;
}
srcY++;
};
break;
default: throw Error("depth not implemented");
};
if (pixels.data !== pixelData) {
pixels.data.set(pixelData);
}
ctx.putImageData(pixels, rect.left, rect.top);
},
primitiveDeferDisplayUpdates: function(argCount) {
var flag = this.stackBoolean(0);
if (!this.success) return false;
this.deferDisplayUpdates = flag;
this.vm.popN(argCount);
return true;
},
primitiveForceDisplayUpdate: function(argCount) {
this.vm.breakOut(); // show on screen
this.vm.popN(argCount);
return true;
},
primitiveScanCharacters: function(argCount) {
if (argCount !== 6) return false;
// Load the arguments
var kernDelta = this.stackInteger(0);
var stops = this.stackNonInteger(1);
var scanRightX = this.stackInteger(2);
var sourceString = this.stackNonInteger(3);
var scanStopIndex = this.stackInteger(4);
var scanStartIndex = this.stackInteger(5);
if (!this.success) return false;
if (stops.pointersSize() < 258 || !sourceString.isBytes()) return false;
if (!(scanStartIndex > 0 && scanStopIndex > 0 && scanStopIndex <= sourceString.bytesSize())) return false;
// Load receiver and required instVars
var rcvr = this.stackNonInteger(6);
if (!this.success || rcvr.pointersSize() < 4) return false;
var scanDestX = this.checkSmallInt(rcvr.pointers[0]);
var scanLastIndex = this.checkSmallInt(rcvr.pointers[1]);
var scanXTable = this.checkNonInteger(rcvr.pointers[2]);
var scanMap = this.checkNonInteger(rcvr.pointers[3]);
if (!this.success || scanMap.pointersSize() !== 256) return false;
var maxGlyph = scanXTable.pointersSize() - 2;
// Okay, here we go. We have eliminated nearly all failure
// conditions, to optimize the inner fetches.
var EndOfRun = 257;
var CrossedX = 258;
var scanLastIndex = scanStartIndex;
while (scanLastIndex <= scanStopIndex) {
// Known to be okay since scanStartIndex > 0 and scanStopIndex <= sourceString size
var ascii = sourceString.bytes[scanLastIndex - 1];
// Known to be okay since stops size >= 258
var stopReason = stops.pointers[ascii];
if (!stopReason.isNil) {
// Store everything back and get out of here since some stop conditionn needs to be checked"
this.ensureSmallInt(scanDestX); if (!this.success) return false;
rcvr.pointers[0] = scanDestX;
rcvr.pointers[1] = scanLastIndex;
return this.popNandPushIfOK(7, stopReason);
}
// Known to be okay since scanMap size = 256
var glyphIndex = this.checkSmallInt(scanMap.pointers[ascii]);
// fail if the glyphIndex is out of range
if (!this.success || glyphIndex < 0 || glyphIndex > maxGlyph) return false;
var sourceX = this.checkSmallInt(scanXTable.pointers[glyphIndex]);
var sourceX2 = this.checkSmallInt(scanXTable.pointers[glyphIndex + 1]);
// Above may fail if non-integer entries in scanXTable
if (!this.success) return false;
var nextDestX = scanDestX + sourceX2 - sourceX;
if (nextDestX > scanRightX) {
// Store everything back and get out of here since we got to the right edge
this.ensureSmallInt(scanDestX); if (!this.success) return false;
rcvr.pointers[0] = scanDestX;
rcvr.pointers[1] = scanLastIndex;
stopReason = stops.pointers[CrossedX - 1];
return this.popNandPushIfOK(7, stopReason);
}
scanDestX = nextDestX + kernDelta;
scanLastIndex = scanLastIndex + 1;
}
this.ensureSmallInt(scanDestX); if (!this.success) return false;
rcvr.pointers[0] = scanDestX;
rcvr.pointers[1] = scanStopIndex;
stopReason = stops.pointers[EndOfRun - 1];
return this.popNandPushIfOK(7, stopReason);
},
primitiveScreenSize: function(argCount) {
var display = this.display,
w = display.width || display.context.canvas.width,
h = display.height || display.context.canvas.height;
return this.popNandPushIfOK(argCount+1, this.makePointWithXandY(w, h));
},
primitiveScreenScaleFactor: function(argCount) {
var scale = this.display.scale || 1.0,
scaleFactor = Math.min(1.0 / scale, window.devicePixelRatio || 1.0);
return this.popNandPushIfOK(argCount+1, this.makeFloat(scaleFactor));
},
primitiveSetFullScreen: function(argCount) {
var flag = this.stackBoolean(0);
if (!this.success) return false;
if (this.display.fullscreen != flag) {
if (this.display.fullscreenRequest) {
// freeze until we get the right display size
var unfreeze = this.vm.freeze();
this.display.fullscreenRequest(flag, function thenDo() {
unfreeze();
});
} else {
this.display.fullscreen = flag;
this.vm.breakOut(); // let VM go into fullscreen mode
}
}
this.vm.popN(argCount);
return true;
},
primitiveTestDisplayDepth: function(argCount) {
var supportedDepths = [1, 2, 4, 8, 16, 32]; // match showForm
return this.popNandPushBoolIfOK(argCount+1, supportedDepths.indexOf(this.stackInteger(0)) >= 0);
},
loadForm: function(formObj, withOffset) {
if (formObj.isNil) return null;
var form = {
obj: formObj,
bits: formObj.pointers[Squeak.Form_bits].wordsOrBytes(),
depth: formObj.pointers[Squeak.Form_depth],
width: formObj.pointers[Squeak.Form_width],
height: formObj.pointers[Squeak.Form_height],
}
if (withOffset) {
var offset = formObj.pointers[Squeak.Form_offset];
form.offsetX = offset.pointers ? offset.pointers[Squeak.Point_x] : 0;
form.offsetY = offset.pointers ? offset.pointers[Squeak.Point_y] : 0;
}
if (form.width === 0 || form.height === 0) return form;
if (!(form.width > 0 && form.height > 0)) return null;
form.msb = form.depth > 0;
if (!form.msb) form.depth = -form.depth;
if (!(form.depth > 0)) return null; // happens if not int
form.pixPerWord = 32 / form.depth;
form.pitch = (form.width + (form.pixPerWord - 1)) / form.pixPerWord | 0;
if (form.bits.length !== (form.pitch * form.height)) {
if (form.bits.length > (form.pitch * form.height)) {
this.vm.warnOnce("loadForm(): " + form.bits.length + " !== " + form.pitch + "*" + form.height + "=" + (form.pitch*form.height));
} else {
return null;
}
}
return form;
},
theDisplay: function() {
return this.loadForm(this.vm.specialObjects[Squeak.splOb_TheDisplay]);
},
displayDirty: function(form, rect) {
if (!this.deferDisplayUpdates
&& form == this.vm.specialObjects[Squeak.splOb_TheDisplay])
this.displayUpdate(this.theDisplay(), rect);
},
displayUpdate: function(form, rect) {
this.showForm(this.display.context, form, rect);
this.display.lastTick = this.vm.lastTick;
this.display.idle = 0;
},
primitiveBeep: function(argCount) {
var ctx = Squeak.startAudioOut();
if (ctx) {
var beep = ctx.createOscillator();
beep.connect(ctx.destination);
beep.type = 'square';
beep.frequency.value = 880;
beep.start();
beep.stop(ctx.currentTime + 0.05);
} else {
this.vm.warnOnce("could not initialize audio");
}
return this.popNIfOK(argCount);
},
hostWindow_primitiveHostWindowTitle: function(argCount) {
if (this.display.setTitle) {
var utf8 = this.stackNonInteger(0).bytes;
var title = (new TextDecoder()).decode(utf8);
this.display.setTitle(title);
}
return this.popNIfOK(argCount);
}
});