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ColorMapCanvas.js
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ColorMapCanvas.js
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var isFirefox = typeof InstallTrigger !== 'undefined';
CURSOR_DEFAULT = 'auto';
CURSOR_MOVE_HIST = 'move';
CURSOR_MOVE_PIN = 'col-resize';
CURSOR_MOVE_ALPHA = 'row-resize';
CURSOR_OVER_CROP = isFirefox ? 'grab' : 'pointer';
CURSOR_MOVE_CROP = isFirefox ? 'grabbing' : 'ew-resize';
// >>> Options
ALPHA_MODE = 'SECTION';
//ALPHA_MODE = 'SPLITTER';
ENABLE_HIGHLIGHT_LABEL = true;
function ColorMapCanvas(canvas, div, divBounds)
{
this.canvas = canvas;
this.div = div;
var gl = webGLStart(canvas);
gl.enable(gl.BLEND);
gl.blendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA); // Blend function: finalcolor = oldcolor + newcolor * newalpha
var sdr = initShader(gl, "vsSimple", "fsColorMap");
var sdrAlpha = initShader(gl, "vsAlpha", "fsColorMap");
var sdrSimple = initShader(gl, "vsSimple", "fsSimple");
var sdrLine = initShader(gl, "vsSimple", "fsLine");
var sdrAlphaLine = initShader(gl, "vsAlpha", "fsLine");
var sdrHighlight = initShader(gl, "vsSimple", "fsHighlight");
var texSplitter = LoadTexture(gl, "splitter.png");
var texInterjectorLeft = LoadTexture(gl, "interjectorLeft.png");
var texInterjectorRight = LoadTexture(gl, "interjectorRight.png");
var texDragPoint = LoadTexture(gl, "dragPoint.png", function() {requestAnimFrame(render);});
var texDragPointHighlighted = LoadTexture(gl, "dragPoint_h.png");
var meshQuad = CreateQuadMesh(gl);
var meshLineQuad = CreateLineQuadMesh(gl);
var meshGrid = CreateGridMesh(gl);
var meshHistogramLines = [];
var meshHistogram = meshQuad;
var meshAlphaCurve = null, meshAlphaCurveLine = null;
var sections = [], splitters = [];
var minValue, maxValue, valueSuffix;
var highlightArea = null;
var dragPointSection = null, dragPoint = null, dragOffset, dragOffset2;
var xr, yr;
actionManager.register('InsertSplitterPin', InsertSplitterPin, RemoveSplitter, UndoRemoveSplitter);
actionManager.register('InsertNestedPin', InsertNestedPin, RemoveSplitter, UndoRemoveSplitter);
actionManager.register('RemoveSplitter', RemoveSplitter, UndoRemoveSplitter);
actionManager.register('MoveSplitter', MoveSplitter, MoveSplitter);
actionManager.register('MoveAlpha', MoveAlpha, MoveAlpha);
actionManager.register('CropSection', CropSection, CropSection);
actionManager.register('SetSectionColormap', SetSectionColormap, ReplaceSectionsAndSplitters, ReplaceSectionsAndSplitters);//SetSectionColormap, SetSectionColormap);
actionManager.register('LoadColormap', LoadColormap, UndoLoadColormap);
RegisterMouseHandler(this, canvas);
var highlightRect = new function()
{
var rect = document.createElement("div");
rect.id = "ImageFrame";
rect.style.left = 0;
rect.style.top = 0;
rect.style.width = "100%";
rect.style.height = "100%";
divBounds.appendChild(rect);
this.show = function() { rect.style.display = "inline-block"; }
this.hide = function() { rect.style.display = "none"; }
};
function showHighlight() { highlightRect.show(); }
function hideHighlight() { highlightRect.hide(); }
var highlightLine = document.createElement("div");
highlightLine.id = "HighlightLine";
divBounds.appendChild(highlightLine);
if(ENABLE_HIGHLIGHT_LABEL)
{
var highlightLineLabel = document.createElement("div");
highlightLineLabel.id = "HighlightLineLabel";
highlightLine.appendChild(highlightLineLabel);
}
var transform = mat4.create(), invtransform = mat4.create();
var showHistogram = true, showAlphaCurve = true;
function render()
{
gl.clear(gl.COLOR_BUFFER_BIT);
var mattrans = mat4.create();
mat4.identity(mattrans);
mat4.mul(mattrans, mattrans, transform);
mat4.translate(mattrans, mattrans, [-1.0, -0.98, 0.0]);
mat4.scale(mattrans, mattrans, [2.0, 0.197, 1.0]);
var mattrans_static = mat4.create();
mat4.identity(mattrans_static);
mat4.translate(mattrans_static, mattrans_static, [-1.0, -0.98, 0.0]);
mat4.scale(mattrans_static, mattrans_static, [2.0, 0.197, 1.0]);
if(showHistogram && meshHistogram != null)
{
gl.useProgram(sdr);
setColorMap(gl, sdr, sections, function(section) {return section.colorMap.texCM}); // Bugfix
gl.uniformMatrix4fv(sdr.matWorldViewProjUniform, false, mattrans);
meshHistogram.bind(sdr, null);
meshHistogram.draw();
}
if(showAlphaCurve && meshAlphaCurve != null)
{
gl.useProgram(sdrAlpha);
setColorMap(gl, sdrAlpha, sections, function(section) {return section.colorMap.texCM}); // Bugfix
gl.uniformMatrix4fv(sdrAlpha.matWorldViewProjUniform, false, mattrans_static);
gl.uniformMatrix4fv(sdrAlpha.matTexCoordTransformUniform, false, invtransform);
meshAlphaCurve.bind(sdrAlpha, null);
meshAlphaCurve.draw();
}
gl.useProgram(sdrLine);
gl.uniformMatrix4fv(sdrLine.matWorldViewProjUniform, false, mattrans);
gl.uniform4f(sdrLine.colorUniform, 0.5, 0.5, 0.5, 1.0);
meshGrid.bind(sdrLine, null);
meshGrid.draw();
if(showHistogram && meshHistogramLines.length !== 0)
{
gl.uniform4f(sdrLine.colorUniform, 0.0, 0.0, 0.0, 1.0);
meshHistogramLines.forEach(function(line) {
line.bind(sdrLine, null);
line.draw();
});
}
if(showAlphaCurve && meshAlphaCurveLine != null)
{
gl.useProgram(sdrAlphaLine);
setColorMap(gl, sdrAlphaLine, sections, function(section) {return section.colorMap.texCM}); // Bugfix
gl.uniformMatrix4fv(sdrAlphaLine.matWorldViewProjUniform, false, mattrans_static);
gl.uniformMatrix4fv(sdrAlphaLine.matTexCoordTransformUniform, false, invtransform);
gl.uniform4f(sdrAlphaLine.colorUniform, 0.0, 0.0, 0.0, 1.0);
meshAlphaCurveLine.bind(sdrAlphaLine, null);
meshAlphaCurveLine.draw();
}
if(highlightArea != null)
{
gl.useProgram(sdrHighlight);
meshQuad.bind(sdrHighlight, null);
mat4.identity(mattrans);
mat4.mul(mattrans, mattrans, transform);
mat4.translate(mattrans, mattrans, [2.0 * highlightArea[0] - 1.0, -0.98, 0.0]);
mat4.scale(mattrans, mattrans, [(highlightArea[1] - highlightArea[0]) * 2.0, 1.97, 1.0]);
gl.uniformMatrix4fv(sdrHighlight.matWorldViewProjUniform, false, mattrans);
meshQuad.draw();
}
gl.enable(gl.BLEND);
splitters.forEach(function(splitter) {
if(!splitter.fixed)
{
if(splitter.left === null)
drawSplitter(splitter.pos, texInterjectorLeft);
else if(splitter.right === null)
drawSplitter(splitter.pos, texInterjectorRight);
else
drawSplitter(splitter.pos, texSplitter);
}
});
if(dragPointSection != null)
drawDragPoints(dragPointSection);
if(dragPointSection != null && canvas.style.cursor == CURSOR_MOVE_CROP)
{
gl.useProgram(sdrHighlight);
meshLineQuad.bind(sdrHighlight, null);
var start = dragPointSection.start.pos + dragPointSection.startValue * (dragPointSection.end.pos - dragPointSection.start.pos);
var end = dragPointSection.start.pos + dragPointSection.endValue * (dragPointSection.end.pos - dragPointSection.start.pos);
mat4.identity(mattrans);
mat4.mul(mattrans, mattrans, transform);
mat4.translate(mattrans, mattrans, [2.0 * start - 1.0, -0.98, 0.0]);
mat4.scale(mattrans, mattrans, [(end - start) * 2.0, 0.197, 1.0]);
gl.uniformMatrix4fv(sdrHighlight.matWorldViewProjUniform, false, mattrans);
gl.lineWidth(4.0);
meshLineQuad.draw();
gl.lineWidth(1.0);
}
}
function drawSplitter(pos, tex) // pos = 0.0 ... 1.0
{
gl.useProgram(sdrSimple);
var vpos = vec3.create();
vec3.transformMat4(vpos, [2.0 * pos - 1.0, -1.0, 0.0], transform);
var mattrans = mat4.create();
mat4.identity(mattrans);
mat4.translate(mattrans, mattrans, vpos);
mat4.scale(mattrans, mattrans, [tex.image.width / gl.viewportWidth, tex.image.height / gl.viewportHeight, 1.0]);
mat4.translate(mattrans, mattrans, [-0.5, 0.0, 0.0]);
gl.uniformMatrix4fv(sdrSimple.matWorldViewProjUniform, false, mattrans);
meshQuad.bind(sdrSimple, tex);
meshQuad.draw();
}
function drawDragPoints(section)
{
gl.useProgram(sdrSimple);
var vpos = vec3.create();
var mattrans = mat4.create();
if(dragPoint != 'end' || canvas.style.cursor != CURSOR_MOVE_CROP)
{
if(dragPoint == 'start' && canvas.style.cursor == CURSOR_MOVE_CROP)
{
var start = dragPointSection.start.pos + dragPointSection.startValue * (dragPointSection.end.pos - dragPointSection.start.pos);
start += dragOffset2;
vec3.transformMat4(vpos, [2.0 * start - 1.0, -0.95, 0.0], transform);
}
else
{
vec3.transformMat4(vpos, [2.0 * dragPointSection.start.pos - 1.0, -0.95, 0.0], transform);
vpos[0] += 32.0 / gl.viewportWidth;
}
mat4.identity(mattrans);
mat4.translate(mattrans, mattrans, vpos);
mat4.scale(mattrans, mattrans, [texDragPoint.image.width / gl.viewportWidth, texDragPoint.image.height / gl.viewportHeight, 1.0]);
mat4.translate(mattrans, mattrans, [-0.5, 0.0, 0.0]);
gl.uniformMatrix4fv(sdrSimple.matWorldViewProjUniform, false, mattrans);
meshQuad.bind(sdrSimple, dragPoint == 'start' ? texDragPointHighlighted : texDragPoint);
meshQuad.draw();
}
if(dragPoint != 'start' || canvas.style.cursor != CURSOR_MOVE_CROP)
{
if(dragPoint == 'end' && canvas.style.cursor == CURSOR_MOVE_CROP)
{
var end = dragPointSection.start.pos + dragPointSection.endValue * (dragPointSection.end.pos - dragPointSection.start.pos);
end += dragOffset2;
vec3.transformMat4(vpos, [2.0 * end - 1.0, -0.95, 0.0], transform);
}
else
{
vec3.transformMat4(vpos, [2.0 * dragPointSection.end.pos - 1.0, -0.95, 0.0], transform);
vpos[0] -= 32.0 / gl.viewportWidth;
}
mat4.identity(mattrans);
mat4.translate(mattrans, mattrans, vpos);
mat4.scale(mattrans, mattrans, [texDragPoint.image.width / gl.viewportWidth, texDragPoint.image.height / gl.viewportHeight, 1.0]);
mat4.translate(mattrans, mattrans, [-0.5, 0.0, 0.0]);
gl.uniformMatrix4fv(sdrSimple.matWorldViewProjUniform, false, mattrans);
meshQuad.bind(sdrSimple, dragPoint == 'end' ? texDragPointHighlighted : texDragPoint);
meshQuad.draw();
}
}
this.onResize = function()
{
gl.viewportWidth = canvas.width = div.offsetWidth - 2 * parseInt(canvas.style.left);
gl.viewportHeight = canvas.height = div.offsetHeight - 2 * parseInt(canvas.style.top);
gl.viewport(0, 0, gl.viewportWidth, gl.viewportHeight);
divBounds.style.left = canvas.offsetLeft;
divBounds.style.top = canvas.offsetTop;
divBounds.style.width = canvas.offsetWidth;
divBounds.style.height = canvas.offsetHeight;
repositionHistogramLabels();
if(ENABLE_HIGHLIGHT_LABEL)
repositionHighlightLineLabel();
recreateAlphaCurveMeshes();
requestAnimFrame(render);
}
this.onResize();
function repositionHighlightLineLabel()
{
highlightLineLabel.style.bottom = canvas.height * 0.11;
}
function repositionHistogramLabels()
{
var v = vec3.create();
for(var i = 0; i <= 10; ++i)
{
vec3.transformMat4(v, [-1.0 + 0.2 * i, 0.0, 0.0], transform);
var left = 75.5 + (v[0] + 1.0) * canvas.width / 2;
if(50 < left && left < canvas.width + 100)
{
lblHistogramH[i].style.visibility = 'visible';
lblHistogramH[i].style.left = 35.5 + (v[0] + 1.0) * canvas.width / 2;
lblHistogramV[i].style.top = canvas.height * (0.905 - 0.088 * i) + 6.0;
lblHistogramV[i].style.visibility = i % 2 ? 'hidden' : 'visible';
}
else
lblHistogramH[i].style.visibility = 'hidden';
}
}
function recreateAlphaCurveMeshes()
{
if(meshAlphaCurve)
meshAlphaCurve.free();
if(meshAlphaCurveLine)
meshAlphaCurveLine.free();
var positions = [];
for(var i = 0; i <= canvas.width; ++i)
[].push.apply(positions, [i / (canvas.width - 1), 1.0, 0.0]);
meshAlphaCurveLine = new Mesh(gl, positions, null, null, null, null, null, gl.LINE_STRIP);
positions = [];
for(var i = 0; i < canvas.width; ++i)
{
var x = i / (canvas.width - 1);
[].push.apply(positions, [x, 1.0, 0.0]);
[].push.apply(positions, [x, 0.0, 0.0]);
}
meshAlphaCurve = new Mesh(gl, positions);
}
function updateDragPointDisplay()
{
if(xr === null || yr === null || startsWith(canvas.style.cursor, 'url') || dragSplitter !== null)
return;
var oldDragPointSection = dragPointSection;
dragPointSection = null;
var oldDragPoint = dragPoint;
dragPoint = null;
// Set move mouse cursor if a splitter is close to xr
var tolearance = 5.0 * invtransform[0] / canvas.width; // Grab tolerance is +- 5 pixels
/*var splitterIdx;
for(splitterIdx = 0; splitterIdx < splitters.length; ++splitterIdx)
if(Math.abs(splitters[splitterIdx].pos - xr) < tolearance)
break;*/
var closestSplitterIdx = -1;
var closestSplitterDistance = tolearance;
for(var splitterIdx = 0; splitterIdx < splitters.length; ++splitterIdx)
if(/*!splitters[splitterIdx].fixed &&*/ Math.abs(splitters[splitterIdx].pos - xr) < closestSplitterDistance)
{
closestSplitterDistance = Math.abs(splitters[splitterIdx].pos - xr);
closestSplitterIdx = splitterIdx;
}
if(closestSplitterIdx == -1)
{
// Get section under mouse cursor
sections.forEach(function(section) {
if(dragPointSection == null && section.start.pos < xr && xr < section.end.pos)
dragPointSection = section;
});
if(dragPointSection != null)
{
if(showAlphaCurve && ALPHA_MODE === 'SECTION')
{
var sxr = (xr - dragPointSection.start.pos) / (dragPointSection.end.pos - dragPointSection.start.pos); // Compute relative position within section
var sar = (1 - sxr) * dragPointSection.startAlpha + sxr * dragPointSection.endAlpha; // Compute relative alpha within section (= alpha at mouse position)
var y_sar = 0.9 - 0.9 * sar; // Compute pixel position of sar
var tolearance_y = 16.0 / (2.0 * canvas.height); // Grab tolerance is +- 16 pixels
if(Math.abs(y_sar - yr) < tolearance_y)
{
canvas.style.cursor = CURSOR_MOVE_ALPHA;
return; //EDIT
}
}
// Show drag points on section underneath mouse cursor
var sectionwidth = (dragPointSection.end.pos - dragPointSection.start.pos) * canvas.width / invtransform[0]; // Compute visible section width in pixels
if(sectionwidth >= 56.0) // 56 = 2 * drag_point_width (16 pixels) + 3 * drag_point_distance (8 pixels)
{
var tolearance_x = 16.0 * invtransform[0] / canvas.width, tolearance_y = 16.0 / (2.0 * canvas.height); // Grab tolerance is +- 16 pixels
// Set move grab cursor if a drag point is close to xr
if(Math.abs(dragPointSection.end.pos - xr - 8.0 * invtransform[0] / gl.viewportWidth) < tolearance_x && Math.abs(0.95 - yr) < tolearance_y)
{
dragPoint = 'end';
canvas.style.cursor = CURSOR_OVER_CROP;
}
else if(Math.abs(dragPointSection.start.pos - xr + 8.0 * invtransform[0] / gl.viewportWidth) < tolearance_x && Math.abs(0.95 - yr) < tolearance_y)
{
dragPoint = 'start';
canvas.style.cursor = CURSOR_OVER_CROP;
}
else
canvas.style.cursor = CURSOR_DEFAULT;
}
else
dragPointSection = null;
}
}
else
{
var splitterAlpha = 0.0;
if(splitters[closestSplitterIdx].left != null)
splitterAlpha = splitters[closestSplitterIdx].left.endAlpha;
else if(splitters[closestSplitterIdx].right != null)
splitterAlpha = splitters[closestSplitterIdx].right.startAlpha;
var y_splitterAlpha = 0.9 - 0.9 * splitterAlpha; // Compute pixel position of splitterAlpha
var tolearance_y = 16.0 / (2.0 * canvas.height); // Grab tolerance is +- 16 pixels
if(showAlphaCurve && ALPHA_MODE === 'SPLITTER' && Math.abs(y_splitterAlpha - yr) < tolearance_y)
canvas.style.cursor = CURSOR_MOVE_ALPHA;
else if(!splitters[closestSplitterIdx].fixed)
canvas.style.cursor = CURSOR_MOVE_PIN;
}
if(dragPointSection != oldDragPointSection || dragPoint != oldDragPoint)
requestAnimFrame(render);
}
this.setValueRange = function(min, max)
{
// Convert string to number
min = min * 1;
max = max * 1;
minValue = min;
maxValue = max;
for(var i = 0; i <= 10; ++i)
lblHistogramH[i].innerHTML = "" + (min + i * (max - min) / 10.0).toPrecision(3);
}
this.setValueRange(0, 100);
this.showHistogram = function()
{
showHistogram = true;
requestAnimFrame(render);
}
this.hideHistogram = function()
{
showHistogram = false;
requestAnimFrame(render);
}
this.showAlphaCurve = function()
{
showAlphaCurve = true;
requestAnimFrame(render);
}
this.hideAlphaCurve = function()
{
showAlphaCurve = false;
requestAnimFrame(render);
}
function onDragOver(event)
{
if(event.dataTransfer.types == null)
return;
for(var i = 0; i < event.dataTransfer.types.length; ++i)
if(event.dataTransfer.types[i] === 'colormapname')
{
//console.log("event.dataTransfer.types[i] = " + event.dataTransfer.types[i]);
event.preventDefault();
var canvasBounds = canvas.getBoundingClientRect();
var xr = (event.clientX - canvasBounds.left) / canvas.width;
var vpos = vec3.create();
vec3.transformMat4(vpos, [2.0 * xr - 1.0, 0.0, 0.0], invtransform);
xr = vpos[0] / 2.0 + 0.5;
var done = false;
sections.forEach(function(section) {
if(!done && section.start.pos < xr && xr < section.end.pos)
{
highlightArea = [section.start.pos, section.end.pos];
requestAnimFrame(render);
done = true;
}
});
return;
}
else if(event.dataTransfer.types[i] === 'Files')
{
event.preventDefault();
showHighlight();
return;
}
}
canvas.ondragover = onDragOver;
function onDragLeave(event)
{
if(highlightArea != null)
{
highlightArea = null;
requestAnimFrame(render);
}
hideHighlight();
}
canvas.ondragleave = onDragLeave;
function onDrop(event)
{
event.preventDefault();
hideHighlight();
var colorMap = colorMaps[event.dataTransfer.getData('ColorMapName')];
if(colorMap)
{
//hideColorPicker();
highlightArea = null;
var canvasBounds = canvas.getBoundingClientRect();
var xr = (event.clientX - canvasBounds.left) / canvas.width;
var vpos = vec3.create();
vec3.transformMat4(vpos, [2.0 * xr - 1.0, 0.0, 0.0], invtransform);
xr = vpos[0] / 2.0 + 0.5;
var done = false;
var sectionIdx = 0;
sections.forEach(function(section) {
if(!done && section.start.pos <= xr && xr < section.end.pos)
{
actionManager.perform('SetSectionColormap', {sectionIdx: sectionIdx, colormap: colorMap, flipped: colorMap.flipped});
done = true;
}
++sectionIdx;
});
return;
}
var files = (event.files || event.dataTransfer.files);
if(files && files.length === 1 && files[0].type === 'text/xml')
{
var reader = new FileReader();
reader.onload = function(e) {
readColorMapsFromXml(this.result, COLOR_MAP_SIZE, onDroppedColorMapLoaded);
};
reader.readAsDataURL(files[0]);
return;
}
}
canvas.ondrop = onDrop;
function onDragOverTrash(event)
{
if(event.dataTransfer.types != null)
for(var i = 0; i < event.dataTransfer.types.length; ++i)
if(event.dataTransfer.types[i] === 'colormapname')
{
event.preventDefault();
return;
}
}
document.getElementById('cmdTrash1').ondragover = onDragOver;
document.getElementById('cmdTrash2').ondragover = onDragOver;
function onDropIntoTrash(event)
{
var colorMap = colorMaps[event.dataTransfer.getData('ColorMapName')];
if(colorMap)
{
event.preventDefault();
//hideColorPicker();
colorMap.inPicker = false; //EDIT: Remove colormap if not in use by colormap canvas or other colormaps
colormapPicker.recreatePicker();
}
}
document.getElementById('cmdTrash1').ondrop = onDropIntoTrash;
document.getElementById('cmdTrash2').ondrop = onDropIntoTrash;
function onDroppedColorMapLoaded(newColorMaps)
{
// Handle only first colormap
var colormap = newColorMaps._default;
if(!colormap)
return;
actionManager.perform('LoadColormap', colormap);
}
this.loadColorMapTextures = function()
{
var i = 0;
for(var colorMapName in colorMaps)
{
if(colorMapName === '_default' || colorMaps[colorMapName].texCM != null)
continue;
if(colorMaps[colorMapName].texCM == null)
colorMaps[colorMapName].texCM = LoadTextureFromByteArray(gl, new Uint8Array(colorMaps[colorMapName].bytes), colorMaps[colorMapName].bytes.length / 4, 1);
}
if(sections.length === 0 && colorMaps._default != null)
{
splitters = [
{fixed: true, pos: 0.0, left: null, right: null},
{fixed: true, pos: 1.0, left: null, right: null}
];
sections = [
{
colorMap: colorMaps._default,
start: splitters[0],
end: splitters[1],
startValue: 0.0,
endValue: 1.0,
flipped: false,
startAlpha: 1.0,
endAlpha: 1.0
}
];
splitters[0].right = splitters[1].left = sections[0];
}
onColorTableChanged(sections);
}
this.updateHistogram = function(histograms)
{
meshHistogramLines.length = 0;
if (histograms.length === 0)
return;
var size = histograms[0].values.length;
var maxPercentage = 0;
histograms.forEach(function(histogram) {
// Make sure histogram.values.length matches between histograms
if (histogram.values.length != size)
assert("Histograms can't have different resolutions");
// Find overall max-percentage
maxPercentage = Math.max(maxPercentage, histogram.maxPercentage);
// Create line mesh from histogram
var positions = [], texcoords = [];
for(var i = 0; i <= size; ++i)
{
var x = i / (size - 1);
var y = 1.0 + 9.0 * histogram.values[i];
[].push.apply(positions, [x, y, 0.0]);
}
meshHistogramLines.push(new Mesh(gl, positions, null, null, null, null, null, gl.LINE_STRIP));
});
// Create filled mesh from histograms
var positions = [], texcoords = [];
var maxValue;
for(var i = 0; i < size; ++i)
{
maxValue = 0;
histograms.forEach(function(histogram) {
maxValue = Math.max(maxValue, histogram.values[i]);
});
var x0 = i / (size - 1), x1 = (i + 1) / (size - 1);
var y0 = 0.0, y1 = 1.0 + 9.0 * maxValue;
[].push.apply(positions, [x0, y1, 0.0]);
[].push.apply(positions, [x0, y0, 0.0]);
[].push.apply(texcoords, [x0, 0.5]);
[].push.apply(texcoords, [x0, 0.5]);
}
meshHistogram = new Mesh(gl, positions, null, null, null, texcoords);
requestAnimFrame(render);
// Update histgram labels based on maxPercentage
for(var i = 0; i <= 10; ++i)
lblHistogramV[i].innerHTML = (10.0 * i * maxPercentage).toFixed(3) + "%";
}
this.setColorMap = function(sections)
{
setColorMap(gl, sdr, sections, function(section) {return section.colorMap.texCM});
requestAnimFrame(render);
}
this.showTrashButtons = function()
{
document.getElementById('cmdSplitter').style.display = 'none';
document.getElementById('cmdInterjector').style.visibility = 'hidden';
document.getElementById('divUndoRedo').style.visibility = 'hidden';
document.getElementById('cmdTrash1').style.display = display = 'inline-block';
document.getElementById('cmdColormap').style.display = 'none';
document.getElementById('cmdSaveColormap').style.visibility = 'hidden';
document.getElementById('cmdHistogram').style.visibility = 'hidden';
document.getElementById('cmdAlpha').style.visibility = 'hidden';
document.getElementById('cmdHistogramAlpha').style.visibility = 'hidden';
document.getElementById('cmdTrash2').style.display = display = 'inline-block';
}
this.hideTrashButtons = function()
{
document.getElementById('cmdTrash1').style.display = display = 'none';
document.getElementById('cmdSplitter').style.display = 'inline-block';
document.getElementById('cmdInterjector').style.visibility = 'visible';
document.getElementById('divUndoRedo').style.visibility = 'visible';
document.getElementById('cmdTrash2').style.display = display = 'none';
document.getElementById('cmdColormap').style.display = 'inline-block';
document.getElementById('cmdSaveColormap').style.visibility = 'visible';
document.getElementById('cmdHistogram').style.visibility = 'visible';
document.getElementById('cmdAlpha').style.visibility = 'visible';
document.getElementById('cmdHistogramAlpha').style.visibility = 'visible';
}
var dragSplitter = null, dragSection = null, dragBoundsLeft, dragBoundsRight, dragStartPos, dragStartAlpha;
var tmd0 = vec3.create();
this.onMouseDown = function(canvas, clientX, clientY, which)
{
if(which != 1)
return;
// Trigger mouse move event to make sure everything is set up for a mouse down at the current location
this.onMouseMove(canvas, clientX, clientY, [true, false, false]);
var xr = clientX / canvas.width;
if(canvas.style.cursor == CURSOR_MOVE_PIN)
{
var vpos = vec3.create();
vec3.transformMat4(vpos, [2.0 * xr - 1.0, 0.0, 0.0], invtransform);
xr = vpos[0] / 2.0 + 0.5;
this.showTrashButtons();
var dragSplitterDistance = Number.MAX_VALUE;
splitters.forEach(function(splitter) {
if(!splitter.fixed && Math.abs(splitter.pos - xr) < dragSplitterDistance)
{
dragSplitterDistance = Math.abs(splitter.pos - xr);
dragSplitter = splitter;
}
});
dragBoundsLeft = dragSplitter.left !== null ? dragSplitter.left.start.pos : 0.0;
dragBoundsRight = dragSplitter.right !== null ? dragSplitter.right.end.pos : 1.0;
dragStartPos = dragSplitter.pos;
/*splitters.forEach(function(splitter) {
if(splitter !== dragSplitter)
{
if(splitter.pos < dragSplitter.pos)
dragBoundsLeft = Math.max(dragBoundsLeft, splitter.pos);
else
dragBoundsRight = Math.min(dragBoundsRight, splitter.pos);
}
});
console.log(dragBoundsLeft + " - " + dragBoundsRight);*/
}
else if(canvas.style.cursor == CURSOR_MOVE_ALPHA && ALPHA_MODE === 'SPLITTER')
{
var vpos = vec3.create();
vec3.transformMat4(vpos, [2.0 * xr - 1.0, 0.0, 0.0], invtransform);
xr = vpos[0] / 2.0 + 0.5;
var dragSplitterDistance = Number.MAX_VALUE;
splitters.forEach(function(splitter) {
if(Math.abs(splitter.pos - xr) < dragSplitterDistance)
{
dragSplitterDistance = Math.abs(splitter.pos - xr);
dragSplitter = splitter;
}
});
dragStartAlpha = 0.0;
if(dragSplitter.left != null)
dragStartAlpha = dragSplitter.left.endAlpha;
else if(dragSplitter.right != null)
dragStartAlpha = dragSplitter.right.startAlpha;
}
else if(canvas.style.cursor == CURSOR_MOVE_ALPHA && ALPHA_MODE === 'SECTION')
{
dragSection = dragPointSection;
dragStartAlpha = [dragSection.startAlpha, dragSection.endAlpha];
}
else if(canvas.style.cursor == CURSOR_OVER_CROP)
{
var vpos = vec3.create();
vec3.transformMat4(vpos, [2.0 * xr - 1.0, 0.0, 0.0], invtransform);
xr = vpos[0] / 2.0 + 0.5;
xr = (xr - dragPointSection.start.pos) / (dragPointSection.end.pos - dragPointSection.start.pos);
if(dragPoint == 'start')
{
dragStartPos = dragPointSection.startValue;
dragOffset = xr - dragPointSection.startValue;
dragOffset2 = (16.0 * invtransform[0] / gl.viewportWidth) - dragPointSection.startValue * (dragPointSection.end.pos - dragPointSection.start.pos);
}
else if(dragPoint == 'end')
{
dragStartPos = dragPointSection.endValue;
dragOffset = xr - dragPointSection.endValue;
dragOffset2 = (1.0 - dragPointSection.endValue) * (dragPointSection.end.pos - dragPointSection.start.pos) - (16.0 * invtransform[0] / gl.viewportWidth);
}
canvas.style.cursor = CURSOR_MOVE_CROP;
requestAnimFrame(render); // Redraw to hide drag points
}
else if(startsWith(canvas.style.cursor, 'url'))
{
var vpos = vec3.create();
vec3.transformMat4(vpos, [2.0 * xr - 1.0, 0.0, 0.0], invtransform);
xr = vpos[0] / 2.0 + 0.5;
// Find section containing xr
var sectionIdx;
for(sectionIdx = 0; sectionIdx < sections.length; ++sectionIdx)
if(sections[sectionIdx].start.pos < xr && xr <= sections[sectionIdx].end.pos)
break;
if(sectionIdx == sections.length)
return;
if(canvas.style.cursor.indexOf('splitterCursor') != -1)
actionManager.perform('InsertSplitterPin', xr);
else
actionManager.perform('InsertNestedPin', xr);
if(!ctrlPressed)
canvas.style.cursor = CURSOR_DEFAULT;
}
else
{
xr = 1.0 - 2.0 * xr;
canvas.style.cursor = CURSOR_MOVE_HIST;
var transform_noscale = mat4.create();
mat4.copy(transform_noscale, transform);
transform_noscale[0] = 1.0;
vec3.transformMat4(tmd0, [xr, 0.0, 0.0], transform_noscale);
}
}
function startsWith(str, s)
{
return str.lastIndexOf(s, 0) === 0;
}
this.onMouseMove = function(canvas, clientX, clientY, pressedmousebuttons)
{
xr = clientX / canvas.width;
yr = clientY / canvas.height;
var showHighlight = false;
if(dragSplitter !== null && canvas.style.cursor == CURSOR_MOVE_PIN)
{
var vpos = vec3.create();
vec3.transformMat4(vpos, [2.0 * xr - 1.0, 0.0, 0.0], invtransform);
xr = vpos[0] / 2.0 + 0.5;
//xr = Math.min(Math.max(xr, 0.0), 1.0);
/*if(dragSplitter.left !== null)
xr = Math.max(xr, dragSplitter.left.start.pos);
if(dragSplitter.right !== null)
{
xr = Math.min(xr, dragSplitter.right.end.pos);
console.log(dragSplitter.right.end.pos);
}*/
xr = Math.max(xr, dragBoundsLeft);
xr = Math.min(xr, dragBoundsRight);
MoveSplitter({splitter: dragSplitter, pos: xr});
}
else if(dragSplitter !== null && canvas.style.cursor == CURSOR_MOVE_ALPHA && ALPHA_MODE === 'SPLITTER')
{
// yr alpha
// 0.9 ... 0.0
// 0.0 ... 1.0
//1.0 - yr / 0.9
//Math.min(1.0, Math.max(0.0, 1.0 - yr / 0.9)));
MoveAlpha({splitter: dragSplitter, alpha: Math.min(1.0, Math.max(0.0, 1.0 - yr / 0.9))});
}
else if(dragSection !== null && canvas.style.cursor == CURSOR_MOVE_ALPHA && ALPHA_MODE === 'SECTION')
{
// yr alpha
// 0.9 ... 0.0
// 0.0 ... 1.0
//1.0 - yr / 0.9
//Math.min(1.0, Math.max(0.0, 1.0 - yr / 0.9)));
var newAlpha = Math.min(1.0, Math.max(0.0, 1.0 - yr / 0.9));
MoveAlpha({section: dragSection, startAlpha: newAlpha, endAlpha: newAlpha});
}
else if(dragPointSection != null && canvas.style.cursor == CURSOR_MOVE_CROP)
{
var vpos = vec3.create();
vec3.transformMat4(vpos, [2.0 * xr - 1.0, 0.0, 0.0], invtransform);
xr = vpos[0] / 2.0 + 0.5;
xr = (xr - dragPointSection.start.pos) / (dragPointSection.end.pos - dragPointSection.start.pos);
xr -= dragOffset;
if(dragPoint == 'start')
CropSection({section: dragPointSection, startValue: Math.min(xr, 0.0), endValue: dragPointSection.endValue});
else if(dragPoint == 'end')
CropSection({section: dragPointSection, startValue: dragPointSection.startValue, endValue: Math.max(xr, 1.0)});
}
else if(startsWith(canvas.style.cursor, 'url'))
showHighlight = true;
else
{
if(canvas.style.cursor == CURSOR_MOVE_HIST)
{
xr = 1.0 - 2.0 * xr;
var transform_noscale = mat4.create();
mat4.copy(transform_noscale, transform);
transform_noscale[0] = 1.0;
var t0 = vec3.create(), tm = vec3.create(), tm0 = vec3.create();
vec3.transformMat4(tm0, [xr, 0.0, 0.0], transform_noscale);
vec3.transformMat4(t0, [0.0, 0.0, 0.0], transform_noscale);
vec3.sub(tm0, tmd0, tm0);
vec3.add(tm0, tm0, t0);
vec3.transformMat4(tm0, tm0, invtransform);
mat4.translate(transform, transform, tm0);
restrictTransform(transform);
mat4.invert(invtransform, transform);
requestAnimFrame(render);
repositionHistogramLabels();
}
else
{
var vpos = vec3.create();
vec3.transformMat4(vpos, [2.0 * xr - 1.0, 0.0, 0.0], invtransform);
xr = vpos[0] / 2.0 + 0.5;
updateDragPointDisplay();
showHighlight = true;
}
}
if (showHighlight === true)
{
var _vpos = vec3.create();
vec3.transformMat4(_vpos, [2.0 * xr - 1.0, 0.0, 0.0], invtransform);
imageCanvas.highlightValue(_vpos[0] / 2.0 + 0.5);
this.highlightValue(_vpos[0] / 2.0 + 0.5, clientX);
}
else
{
imageCanvas.highlightValue(null);
this.highlightValue(null);
}
}
this.onMouseLeave = function(canvas, clientX, clientY, pressedmousebuttons)
{
xr = yr = null;
if(dragPointSection != null && canvas.style.cursor != CURSOR_MOVE_CROP)
{
dragPointSection = null;
requestAnimFrame(render);
}
imageCanvas.highlightValue(null);
this.highlightValue(null);
}
this.onMouseUp = function(canvas, clientX, clientY, which, target)
{
if(which == 1 && dragSplitter !== null && canvas.style.cursor == CURSOR_MOVE_PIN)
{
this.hideTrashButtons();
var newpos = dragSplitter.pos;
dragSplitter.pos = dragStartPos; // Use drag start position for undo
if(target === document.getElementById('cmdTrash1')) // If splitter is released above trash1
actionManager.perform('RemoveSplitter', {splitter: dragSplitter, removeRight: false});
else if(target === document.getElementById('cmdTrash2')) // If splitter is released above trash2
actionManager.perform('RemoveSplitter', {splitter: dragSplitter, removeRight: true});
else
actionManager.perform('MoveSplitter', {splitter: dragSplitter, pos: newpos});
dragSplitter = null;
}
else if(which == 1 && dragSplitter !== null && canvas.style.cursor == CURSOR_MOVE_ALPHA && ALPHA_MODE === 'SPLITTER')
{
var newAlpha = 0.0;
if(dragSplitter.left != null)
{
newAlpha = dragSplitter.left.endAlpha;
dragSplitter.left.endAlpha = dragStartAlpha; // Use drag start alpha for undo
}
if(dragSplitter.right != null)
{
newAlpha = dragSplitter.right.startAlpha;
dragSplitter.right.startAlpha = dragStartAlpha; // Use drag start alpha for undo
}
actionManager.perform('MoveAlpha', {splitter: dragSplitter, alpha: newAlpha});
dragSplitter = null;
}