1 files changed, 359 insertions, 0 deletions
diff --git a/Tools/DumpRenderTree/efl/ImageDiff.cpp b/Tools/DumpRenderTree/efl/ImageDiff.cpp
new file mode 100644
index 000000000..754ecb22a
--- /dev/null
+++ b/Tools/DumpRenderTree/efl/ImageDiff.cpp
@@ -0,0 +1,359 @@
+/*
+ * Copyright (C) 2009 Zan Dobersek <zandobersek@gmail.com>
+ * Copyright (C) 2010 Igalia S.L.
+ * Copyright (C) 2011 ProFUSION Embedded Systems
+ * Copyright (C) 2011 Samsung Electronics
+ *
+ * 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 "config.h"
+
+#include <Ecore.h>
+#include <Ecore_Evas.h>
+#include <Evas.h>
+#include <algorithm>
+#include <cmath>
+#include <cstdio>
+#include <cstdlib>
+#include <getopt.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
+#include <wtf/OwnArrayPtr.h>
+#include <wtf/OwnPtr.h>
+#include <wtf/PassOwnPtr.h>
+
+enum PixelComponent {
+    Red,
+    Green,
+    Blue,
+    Alpha
+};
+
+static OwnPtr<Ecore_Evas> gEcoreEvas;
+static double gTolerance = 0;
+
+static void abortWithErrorMessage(const char* errorMessage);
+
+static unsigned char* pixelFromImageData(unsigned char* imageData, int rowStride, int x, int y)
+{
+    return imageData + (y * rowStride) + (x << 2);
+}
+
+static Evas_Object* differenceImageFromDifferenceBuffer(Evas* evas, unsigned char* buffer, int width, int height)
+{
+    Evas_Object* image = evas_object_image_filled_add(evas);
+    if (!image)
+        abortWithErrorMessage("could not create difference image");
+
+    evas_object_image_size_set(image, width, height);
+    evas_object_image_colorspace_set(image, EVAS_COLORSPACE_ARGB8888);
+
+    unsigned char* diffPixels = static_cast<unsigned char*>(evas_object_image_data_get(image, EINA_TRUE));
+    const int rowStride = evas_object_image_stride_get(image);
+    for (int x = 0; x < width; x++) {
+        for (int y = 0; y < height; y++) {
+            unsigned char* diffPixel = pixelFromImageData(diffPixels, rowStride, x, y);
+            diffPixel[Red] = diffPixel[Green] = diffPixel[Blue] = *buffer++;
+            diffPixel[Alpha] = 0xff;
+        }
+    }
+
+    evas_object_image_data_set(image, diffPixels);
+
+    return image;
+}
+
+static float computeDistanceBetweenPixelComponents(unsigned char actualComponent, unsigned char baseComponent)
+{
+    return (actualComponent - baseComponent) / std::max<float>(255 - baseComponent, baseComponent);
+}
+
+static float computeDistanceBetweenPixelComponents(unsigned char* actualPixel, unsigned char* basePixel, PixelComponent component)
+{
+    return computeDistanceBetweenPixelComponents(actualPixel[component], basePixel[component]);
+}
+
+static float calculatePixelDifference(unsigned char* basePixel, unsigned char* actualPixel)
+{
+    const float red = computeDistanceBetweenPixelComponents(actualPixel, basePixel, Red);
+    const float green = computeDistanceBetweenPixelComponents(actualPixel, basePixel, Green);
+    const float blue = computeDistanceBetweenPixelComponents(actualPixel, basePixel, Blue);
+    const float alpha = computeDistanceBetweenPixelComponents(actualPixel, basePixel, Alpha);
+    return sqrtf(red * red + green * green + blue * blue + alpha * alpha) / 2.0f;
+}
+
+static float calculateDifference(Evas_Object* baselineImage, Evas_Object* actualImage, OwnPtr<Evas_Object>& differenceImage)
+{
+    int width, height, baselineWidth, baselineHeight;
+    evas_object_image_size_get(actualImage, &width, &height);
+    evas_object_image_size_get(baselineImage, &baselineWidth, &baselineHeight);
+
+    if (width != baselineWidth || height != baselineHeight) {
+        printf("Error, test and reference image have different sizes.\n");
+        return 100; // Completely different.
+    }
+
+    OwnArrayPtr<unsigned char> diffBuffer = adoptArrayPtr(new unsigned char[width * height]);
+    if (!diffBuffer)
+        abortWithErrorMessage("could not create difference buffer");
+
+    const int actualRowStride = evas_object_image_stride_get(actualImage);
+    const int baseRowStride = evas_object_image_stride_get(baselineImage);
+    unsigned numberOfDifferentPixels = 0;
+    float totalDistance = 0;
+    float maxDistance = 0;
+    unsigned char* actualPixels = static_cast<unsigned char*>(evas_object_image_data_get(actualImage, EINA_FALSE));
+    unsigned char* basePixels = static_cast<unsigned char*>(evas_object_image_data_get(baselineImage, EINA_FALSE));
+    unsigned char* currentDiffPixel = diffBuffer.get();
+
+    for (int x = 0; x < width; x++) {
+        for (int y = 0; y < height; y++) {
+            unsigned char* actualPixel = pixelFromImageData(actualPixels, actualRowStride, x, y);
+            unsigned char* basePixel = pixelFromImageData(basePixels, baseRowStride, x, y);
+
+            const float distance = calculatePixelDifference(basePixel, actualPixel);
+            *currentDiffPixel++ = static_cast<unsigned char>(distance * 255.0f);
+
+            if (distance >= 1.0f / 255.0f) {
+                ++numberOfDifferentPixels;
+                totalDistance += distance;
+                maxDistance = std::max<float>(maxDistance, distance);
+            }
+        }
+    }
+
+    // When using evas_object_image_data_get(), a complementary evas_object_data_set() must be
+    // issued to balance the reference count, even if the image hasn't been changed.
+    evas_object_image_data_set(baselineImage, basePixels);
+    evas_object_image_data_set(actualImage, actualPixels);
+
+    // 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 (numberOfDifferentPixels)
+        difference = 100.0f * totalDistance / (height * width);
+    if (difference <= gTolerance)
+        difference = 0;
+    else {
+        difference = roundf(difference * 100.0f) / 100.0f;
+        difference = std::max(difference, 0.01f); // round to 2 decimal places
+
+        differenceImage = adoptPtr(differenceImageFromDifferenceBuffer(evas_object_evas_get(baselineImage), diffBuffer.get(), width, height));
+    }
+
+    return difference;
+}
+
+static int getTemporaryFile(char *fileName, size_t fileNameLength)
+{
+    char* tempDirectory = getenv("TMPDIR");
+    if (!tempDirectory)
+        tempDirectory = getenv("TEMP");
+
+    if (tempDirectory)
+        snprintf(fileName, fileNameLength, "%s/ImageDiffXXXXXX.png", tempDirectory);
+    else {
+#if __linux__
+        strcpy(fileName, "/dev/shm/ImageDiffXXXXXX.png");
+        const int fileDescriptor = mkstemps(fileName, sizeof(".png") - 1);
+        if (fileDescriptor >= 0)
+            return fileDescriptor;
+#endif // __linux__
+
+        strcpy(fileName, "ImageDiffXXXXXX.png");
+    }
+
+    return mkstemps(fileName, sizeof(".png") - 1);
+}
+
+static void printImage(Evas_Object* image)
+{
+    char fileName[PATH_MAX];
+
+    const int tempImageFd = getTemporaryFile(fileName, PATH_MAX);
+    if (tempImageFd == -1)
+        abortWithErrorMessage("could not create temporary file");
+
+    evas_render(evas_object_evas_get(image));
+
+    if (evas_object_image_save(image, fileName, 0, 0)) {
+        struct stat fileInfo;
+        if (!stat(fileName, &fileInfo)) {
+            printf("Content-Length: %ld\n", fileInfo.st_size);
+            fflush(stdout);
+
+            unsigned char buffer[2048];
+            ssize_t bytesRead;
+            while ((bytesRead = read(tempImageFd, buffer, sizeof(buffer))) > 0)
+                write(1, buffer, bytesRead);
+        }
+    }
+    close(tempImageFd);
+    unlink(fileName);
+}
+
+static void printImageDifferences(Evas_Object* baselineImage, Evas_Object* actualImage)
+{
+    OwnPtr<Evas_Object> differenceImage;
+    const float difference = calculateDifference(baselineImage, actualImage, differenceImage);
+
+    if (difference > 0.0f) {
+        if (differenceImage)
+            printImage(differenceImage.get());
+
+        printf("diff: %01.2f%% failed\n", difference);
+    } else
+        printf("diff: %01.2f%% passed\n", difference);
+}
+
+static void resizeEcoreEvasIfNeeded(Evas_Object* image)
+{
+    int newWidth, newHeight;
+    evas_object_image_size_get(image, &newWidth, &newHeight);
+
+    int currentWidth, currentHeight;
+    ecore_evas_screen_geometry_get(gEcoreEvas.get(), 0, 0, &currentWidth, &currentHeight);
+
+    if (newWidth > currentWidth)
+        currentWidth = newWidth;
+    if (newHeight > currentHeight)
+        currentHeight = newHeight;
+
+    ecore_evas_resize(gEcoreEvas.get(), currentWidth, currentHeight);
+}
+
+static PassOwnPtr<Evas_Object> readImageFromStdin(Evas* evas, long imageSize)
+{
+    OwnArrayPtr<unsigned char> imageBuffer = adoptArrayPtr(new unsigned char[imageSize]);
+    if (!imageBuffer)
+        abortWithErrorMessage("cannot allocate image");
+
+    const size_t bytesRead = fread(imageBuffer.get(), 1, imageSize, stdin);
+    if (!bytesRead)
+        return PassOwnPtr<Evas_Object>();
+
+    Evas_Object* image = evas_object_image_filled_add(evas);
+    evas_object_image_colorspace_set(image, EVAS_COLORSPACE_ARGB8888);
+    evas_object_image_memfile_set(image, imageBuffer.get(), bytesRead, 0, 0);
+
+    resizeEcoreEvasIfNeeded(image);
+
+    return adoptPtr(image);
+}
+
+static bool parseCommandLineOptions(int argc, char** argv)
+{
+    static const option options[] = {
+        { "tolerance", required_argument, 0, 't' },
+        { 0, 0, 0, 0 }
+    };
+    int option;
+
+    while ((option = getopt_long(argc, (char* const*)argv, "t:", options, 0)) != -1) {
+        switch (option) {
+        case 't':
+            gTolerance = atof(optarg);
+            break;
+        case '?':
+        case ':':
+            return false;
+        }
+    }
+
+    return true;
+}
+
+static void shutdownEfl()
+{
+    ecore_evas_shutdown();
+    ecore_shutdown();
+    evas_shutdown();
+}
+
+static void abortWithErrorMessage(const char* errorMessage)
+{
+    shutdownEfl();
+
+    printf("Error, %s.\n", errorMessage);
+    exit(EXIT_FAILURE);
+}
+
+static Evas* initEfl()
+{
+    evas_init();
+    ecore_init();
+    ecore_evas_init();
+
+    gEcoreEvas = adoptPtr(ecore_evas_buffer_new(1, 1));
+    Evas* evas = ecore_evas_get(gEcoreEvas.get());
+    if (!evas)
+        abortWithErrorMessage("could not create Ecore_Evas buffer");
+
+    return evas;
+}
+
+int main(int argc, char* argv[])
+{
+    if (!parseCommandLineOptions(argc, argv))
+        return EXIT_FAILURE;
+
+    Evas* evas = initEfl();
+
+    OwnPtr<Evas_Object> actualImage;
+    OwnPtr<Evas_Object> baselineImage;
+
+    char buffer[2048];
+    while (fgets(buffer, sizeof(buffer), stdin)) {
+        char* contentLengthStart = strstr(buffer, "Content-Length: ");
+        if (!contentLengthStart)
+            continue;
+        long imageSize;
+        if (sscanf(contentLengthStart, "Content-Length: %ld", &imageSize) == 1) {
+            if (imageSize <= 0)
+                abortWithErrorMessage("image size must be specified");
+
+            if (!actualImage)
+                actualImage = readImageFromStdin(evas, imageSize);
+            else if (!baselineImage) {
+                baselineImage = readImageFromStdin(evas, imageSize);
+
+                printImageDifferences(baselineImage.get(), actualImage.get());
+
+                actualImage.clear();
+                baselineImage.clear();
+            }
+        }
+
+        fflush(stdout);
+    }
+
+    gEcoreEvas.clear(); // Make sure ecore_evas_free is called before the EFL are shut down
+
+    shutdownEfl();
+    return EXIT_SUCCESS;
+}