diff options
Diffstat (limited to 'Tools/ImageDiff/gtk/ImageDiff.cpp')
-rw-r--r-- | Tools/ImageDiff/gtk/ImageDiff.cpp | 236 |
1 files changed, 0 insertions, 236 deletions
diff --git a/Tools/ImageDiff/gtk/ImageDiff.cpp b/Tools/ImageDiff/gtk/ImageDiff.cpp deleted file mode 100644 index 2cb9f3bce..000000000 --- a/Tools/ImageDiff/gtk/ImageDiff.cpp +++ /dev/null @@ -1,236 +0,0 @@ -/* - * 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[]) -{ - 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; -} |