Remove Tools/ImageDiff folder which has only qt/gtk/efl implementations left.

Tools/ImageDiff/gtk/ImageDiff.cpp

-/*
- * Copyright (C) 2009 Zan Dobersek <zandobersek@gmail.com>
- * Copyright (C) 2010 Igalia S.L.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1.  Redistributions of source code must retain the above copyright
- *     notice, this list of conditions and the following disclaimer.
- * 2.  Redistributions in binary form must reproduce the above copyright
- *     notice, this list of conditions and the following disclaimer in the
- *     documentation and/or other materials provided with the distribution.
- * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
- *     its contributors may be used to endorse or promote products derived
- *     from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
- * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
- * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
- * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
- * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
- * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include <algorithm>
-#include <cmath>
-#include <cstdio>
-#include <cstring>
-#include <gdk/gdk.h>
-
-using namespace std;
-
-static double tolerance = 0;
-static GOptionEntry commandLineOptionEntries[] = 
-{
-    { "tolerance", 0, 0, G_OPTION_ARG_DOUBLE, &tolerance, "Percentage difference between images before considering them different", "T" },
-    { 0, 0, 0, G_OPTION_ARG_NONE, 0, 0, 0 },
-};
-
-GdkPixbuf* readPixbufFromStdin(long imageSize)
-{
-    unsigned char imageBuffer[2048];
-    GdkPixbufLoader* loader = gdk_pixbuf_loader_new_with_type("png", 0);
-    GError* error = 0;
-
-    while (imageSize > 0) {
-        size_t bytesToRead = min<int>(imageSize, 2048);
-        size_t bytesRead = fread(imageBuffer, 1, bytesToRead, stdin);
-
-        if (!gdk_pixbuf_loader_write(loader, reinterpret_cast<const guchar*>(imageBuffer), bytesRead, &error)) {
-            g_error_free(error);
-            gdk_pixbuf_loader_close(loader, 0);
-            g_object_unref(loader);
-            return 0;
-        }
-
-        imageSize -= static_cast<int>(bytesRead);
-    }
-
-    gdk_pixbuf_loader_close(loader, 0);
-    GdkPixbuf* decodedImage = gdk_pixbuf_loader_get_pixbuf(loader);
-    g_object_ref(decodedImage);
-    return decodedImage;
-}
-
-GdkPixbuf* differenceImageFromDifferenceBuffer(unsigned char* buffer, int width, int height)
-{
-    GdkPixbuf* image = gdk_pixbuf_new(GDK_COLORSPACE_RGB, FALSE, 8, width, height);
-    if (!image)
-        return image;
-
-    int rowStride = gdk_pixbuf_get_rowstride(image);
-    unsigned char* diffPixels = gdk_pixbuf_get_pixels(image);
-    for (int x = 0; x < width; x++) {
-        for (int y = 0; y < height; y++) {
-            unsigned char* diffPixel = diffPixels + (y * rowStride) + (x * 3);
-            diffPixel[0] = diffPixel[1] = diffPixel[2] = *buffer++;
-        }
-    }
-
-    return image;
-}
-
-float calculateDifference(GdkPixbuf* baselineImage, GdkPixbuf* actualImage, GdkPixbuf** differenceImage)
-{
-    int width = gdk_pixbuf_get_width(actualImage);
-    int height = gdk_pixbuf_get_height(actualImage);
-    int numberOfChannels = gdk_pixbuf_get_n_channels(actualImage);
-    if ((width != gdk_pixbuf_get_width(baselineImage))
-        || (height != gdk_pixbuf_get_height(baselineImage))
-        || (numberOfChannels != gdk_pixbuf_get_n_channels(baselineImage))
-        || (gdk_pixbuf_get_has_alpha(actualImage) != gdk_pixbuf_get_has_alpha(baselineImage))) {
-        fprintf(stderr, "Error, test and reference image have different properties.\n");
-        return 100; // Completely different.
-    }
-
-    unsigned char* diffBuffer = static_cast<unsigned char*>(malloc(width * height));
-    float count = 0;
-    float sum = 0;
-    float maxDistance = 0;
-    int actualRowStride = gdk_pixbuf_get_rowstride(actualImage);
-    int baseRowStride = gdk_pixbuf_get_rowstride(baselineImage);
-    unsigned char* actualPixels = gdk_pixbuf_get_pixels(actualImage);
-    unsigned char* basePixels = gdk_pixbuf_get_pixels(baselineImage);
-    unsigned char* currentDiffPixel = diffBuffer;
-    for (int x = 0; x < width; x++) {
-        for (int y = 0; y < height; y++) {
-            unsigned char* actualPixel = actualPixels + (y * actualRowStride) + (x * numberOfChannels);
-            unsigned char* basePixel = basePixels + (y * baseRowStride) + (x * numberOfChannels);
-
-            float red = (actualPixel[0] - basePixel[0]) / max<float>(255 - basePixel[0], basePixel[0]);
-            float green = (actualPixel[1] - basePixel[1]) / max<float>(255 - basePixel[1], basePixel[1]);
-            float blue = (actualPixel[2] - basePixel[2]) / max<float>(255 - basePixel[2], basePixel[2]);
-            float alpha = (actualPixel[3] - basePixel[3]) / max<float>(255 - basePixel[3], basePixel[3]);
-            float distance = sqrtf(red * red + green * green + blue * blue + alpha * alpha) / 2.0f;
-
-            *currentDiffPixel++ = (unsigned char)(distance * 255.0f);
-
-            if (distance >= 1.0f / 255.0f) {
-                count += 1.0f;
-                sum += distance;
-                maxDistance = max<float>(maxDistance, distance);
-            }
-        }
-    }
-
-    // Compute the difference as a percentage combining both the number of
-    // different pixels and their difference amount i.e. the average distance
-    // over the entire image
-    float difference = 0;
-    if (count > 0.0f)
-        difference = 100.0f * sum / (height * width);
-    if (difference <= tolerance)
-        difference = 0;
-    else {
-        difference = roundf(difference * 100.0f) / 100.0f;
-        difference = max(difference, 0.01f); // round to 2 decimal places
-        *differenceImage = differenceImageFromDifferenceBuffer(diffBuffer, width, height);
-    }
-
-    free(diffBuffer);
-    return difference;
-}
-
-void printImage(GdkPixbuf* image)
-{
-    char* buffer;
-    gsize bufferSize;
-    GError* error = 0;
-    if (!gdk_pixbuf_save_to_buffer(image, &buffer, &bufferSize, "png", &error, NULL)) {
-        g_error_free(error);
-        return; // Don't bail out, as we can still use the percentage output.
-    }
-
-    printf("Content-Length: %"G_GSIZE_FORMAT"\n", bufferSize);
-    fwrite(buffer, 1, bufferSize, stdout);
-}
-
-void printImageDifferences(GdkPixbuf* baselineImage, GdkPixbuf* actualImage)
-{
-    GdkPixbuf* differenceImage = 0;
-    float difference = calculateDifference(baselineImage, actualImage, &differenceImage);
-    if (difference > 0.0f) {
-        if (differenceImage) {
-            printImage(differenceImage);
-            g_object_unref(differenceImage);
-        }
-        printf("diff: %01.2f%% failed\n", difference);
-    } else
-        printf("diff: %01.2f%% passed\n", difference);
-}
-
-int main(int argc, char* argv[])
-{
-#if !GLIB_CHECK_VERSION(2, 35, 0)
-    g_type_init();
-#endif
-
-    GError* error = 0;
-    GOptionContext* context = g_option_context_new("- compare two image files, printing their percentage difference and the difference image to stdout");
-    g_option_context_add_main_entries(context, commandLineOptionEntries, 0);
-    if (!g_option_context_parse(context, &argc, &argv, &error)) {
-        printf("Option parsing failed: %s\n", error->message);
-        g_error_free(error);
-        return 1;
-    }
-
-    GdkPixbuf* actualImage = 0;
-    GdkPixbuf* baselineImage = 0;
-    char buffer[2048];
-    while (fgets(buffer, sizeof(buffer), stdin)) {
-        // Convert the first newline into a NUL character so that strtok doesn't produce it.
-        char* newLineCharacter = strchr(buffer, '\n');
-        if (newLineCharacter)
-            *newLineCharacter = '\0';
-
-        if (!strncmp("Content-Length: ", buffer, 16)) {
-            gchar** tokens = g_strsplit(buffer, " ", 0);
-            if (!tokens[1]) {
-                g_strfreev(tokens);
-                printf("Error, image size must be specified..\n");
-                return 1;
-            }
-
-            long imageSize = strtol(tokens[1], 0, 10);
-            g_strfreev(tokens);
-            if (imageSize > 0 && !actualImage) {
-                if (!(actualImage = readPixbufFromStdin(imageSize))) {
-                    printf("Error, could not read actual image.\n");
-                    return 1;
-                }
-            } else if (imageSize > 0 && !baselineImage) {
-                if (!(baselineImage = readPixbufFromStdin(imageSize))) {
-                    printf("Error, could not read baseline image.\n");
-                    return 1;
-                }
-            } else {
-                printf("Error, image size must be specified..\n");
-                return 1;
-            }
-        }
-
-        if (actualImage && baselineImage) {
-            printImageDifferences(baselineImage, actualImage);
-            g_object_unref(actualImage);
-            g_object_unref(baselineImage);
-            actualImage = 0;
-            baselineImage = 0;
-        }
-
-        fflush(stdout);
-    }
-
-    return 0;
-}