erp5_document_scanner: add glfx support
Use the GPU to speed up the image manipulation process.
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| /*jslint indent: 2, unparam: true, bitwise: true */ | ||
| /*global rJS, RSVP, window, document, navigator, Cropper, Promise, JSON, jIO, | ||
| promiseEventListener, domsugar, createImageBitmap, FormData, Caman, | ||
| FileReader, DataView, URL*/ | ||
| FileReader, DataView, URL, fx*/ | ||
| (function (rJS, RSVP, window, document, navigator, Cropper, Promise, JSON, jIO, | ||
| promiseEventListener, domsugar, createImageBitmap, FormData, caman, | ||
| FileReader, DataView, URL) { | ||
| FileReader, DataView, URL, fx) { | ||
| "use strict"; | ||
| ////////////////////////////////////////////////// | ||
| ... | ... | @@ -109,6 +109,29 @@ |
| return new RSVP.Promise(waitForStream, canceller); | ||
| } | ||
| function handleGfx(canvas, settings) { | ||
|
||
| var webgl_canvas = fx.canvas(), | ||
| texture = webgl_canvas.texture(canvas), | ||
| tmp; | ||
| // apply the ink filter | ||
| tmp = webgl_canvas.draw(texture); | ||
| if ((settings.brightness && settings.brightness !== 0) || | ||
| (settings.contrast && settings.contrast !== 0)) { | ||
| tmp.brightnessContrast( | ||
| (settings.brightness || 0) / 100, | ||
| (settings.contrast || 0) / 100 | ||
| ); | ||
| } | ||
| if (settings.enable_greyscale) { | ||
| tmp.hueSaturation(0, -1); | ||
| } | ||
| tmp.update(); | ||
| return webgl_canvas; | ||
| } | ||
| function handleCaman(canvas, settings) { | ||
| var local_caman; | ||
| ... | ... | @@ -142,7 +165,7 @@ |
| this.render(function () { | ||
| // XXX canceller should be called automatically ? | ||
| canceller(); | ||
| resolve(); | ||
| resolve(canvas); | ||
| }); | ||
| } catch (error) { | ||
| canceller(); | ||
| ... | ... | @@ -427,30 +450,57 @@ |
| orientation = result; | ||
| var expected_width = settings.maximum_width, | ||
| bitmap_options, | ||
| div; | ||
| bitmap_options; | ||
| // If orientation is correct, return the original blob | ||
| // and size is small | ||
| // no color correction is expected | ||
| // and no color correction is expected | ||
| if (((orientation < 2) || (8 < orientation)) && | ||
| ((!expected_width) || (original_width < expected_width)) && | ||
| ((!expected_width) || | ||
| ((original_width < expected_width) && (original_height < expected_width))) && | ||
| (!(settings.brightness || settings.contrast || settings.enable_greyscale))) { | ||
| return blob; | ||
| } | ||
| if ((!!expected_width) && (expected_width < original_width)) { | ||
| // Else, transform the image | ||
| return new RSVP.Queue(createImageBitmap(blob)) | ||
| .push(function (bitmap) { | ||
| // Check if image dimension must be changed | ||
| // It is mandatory to check the bitmap info, | ||
| // as the image could be rotated | ||
| var canvas, | ||
| webgl_context, | ||
| higher_dimension_key, | ||
| higher_dimension_value; | ||
| if (bitmap.width < bitmap.height) { | ||
| higher_dimension_key = 'resizeHeight'; | ||
| higher_dimension_value = bitmap.height; | ||
| } else { | ||
| higher_dimension_key = 'resizeWidth'; | ||
| higher_dimension_value = bitmap.width; | ||
| } | ||
| canvas = document.createElement('canvas'); | ||
| webgl_context = canvas.getContext('webgl'); | ||
| expected_width = Math.min( | ||
| expected_width || webgl_context.getParameter(webgl_context.MAX_TEXTURE_SIZE), | ||
| webgl_context.getParameter(webgl_context.MAX_TEXTURE_SIZE) - 1 | ||
| ); | ||
| if ((!!expected_width) && (expected_width < higher_dimension_value)) { | ||
| bitmap_options = { | ||
| resizeWidth: expected_width, | ||
| // resizeHeight: expected_height, | ||
| resizeQuality: 'high' | ||
| }; | ||
| bitmap_options[higher_dimension_key] = expected_width; | ||
| return createImageBitmap(blob, bitmap_options); | ||
| } | ||
| // Else, transform the image | ||
| return new RSVP.Queue(createImageBitmap(blob, bitmap_options)) | ||
| .push(function (bitmap) { | ||
| return bitmap; | ||
| }) | ||
| .push(function (bitmap) { | ||
| var height = bitmap.height, | ||
| width = bitmap.width, | ||
| canvas = domsugar('canvas'), | ||
| ... | ... | @@ -458,9 +508,9 @@ |
| // Caman expect the canvas to be in a container | ||
| // in order to replace it when resizing | ||
| div = domsugar('div', [canvas]); | ||
| domsugar('div', [canvas]); | ||
| if (4 < orientation && orientation < 9) { | ||
| if ((4 < orientation) && (orientation < 9)) { | ||
| canvas.width = height; | ||
| canvas.height = width; | ||
| } else { | ||
| ... | ... | @@ -499,11 +549,13 @@ |
| ctx.drawImage(bitmap, 0, 0); | ||
| if (settings.brightness || settings.contrast || settings.enable_greyscale) { | ||
| return handleCaman(canvas, settings); | ||
| return handleGfx(canvas, settings); | ||
| // return handleCaman(canvas, settings); | ||
| } | ||
| return canvas; | ||
| }) | ||
| .push(function () { | ||
| return promiseCanvasToBlob(div.firstElementChild); | ||
| .push(function (final_canvas) { | ||
| return promiseCanvasToBlob(final_canvas); | ||
| }); | ||
| }); | ||
| } | ||
| ... | ... | @@ -951,4 +1003,4 @@ |
| }(rJS, RSVP, window, document, navigator, Cropper, Promise, JSON, jIO, | ||
| promiseEventListener, domsugar, createImageBitmap, FormData, Caman, | ||
| FileReader, DataView, URL)); | ||
| \ No newline at end of file | ||
| FileReader, DataView, URL, fx)); | ||
| \ No newline at end of file | ||
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