Changed blur tool to pixelate instead

.clang-format

@@ -0,0 +1,89 @@
+Language: Cpp
+# BasedOnStyle: Google
+AccessModifierOffset: -1
+AlignAfterOpenBracket: Align
+AlignConsecutiveAssignments: false
+AlignConsecutiveDeclarations: false
+AlignEscapedNewlinesLeft: true
+AlignOperands: true
+AlignTrailingComments: true
+AllowAllParametersOfDeclarationOnNextLine: true
+AllowShortBlocksOnASingleLine: false
+AllowShortCaseLabelsOnASingleLine: false
+AllowShortFunctionsOnASingleLine: All
+AllowShortIfStatementsOnASingleLine: true
+AllowShortLoopsOnASingleLine: true
+AlwaysBreakAfterDefinitionReturnType: None
+AlwaysBreakAfterReturnType: None
+AlwaysBreakBeforeMultilineStrings: true
+AlwaysBreakTemplateDeclarations: true
+BinPackArguments: true
+BinPackParameters: true
+BraceWrapping:
+  AfterClass: true
+  AfterControlStatement: true
+  AfterEnum: true
+  AfterFunction: true
+  AfterNamespace: true
+  AfterObjCDeclaration: true
+  AfterStruct: true
+  AfterUnion: true
+  BeforeCatch: true
+  BeforeElse: true
+  IndentBraces: false
+BreakBeforeBinaryOperators: None
+BreakBeforeBraces: Allman
+BreakBeforeTernaryOperators: true
+BreakConstructorInitializers: BeforeColon
+BreakConstructorInitializersBeforeComma: false
+ColumnLimit: 80
+CommentPragmas: '^ IWYU pragma:'
+ConstructorInitializerAllOnOneLineOrOnePerLine: false
+ConstructorInitializerIndentWidth: 0
+ContinuationIndentWidth: 2
+Cpp11BracedListStyle: true
+DerivePointerAlignment: true
+DisableFormat: false
+ExperimentalAutoDetectBinPacking: false
+ForEachMacros: [ foreach, Q_FOREACH, BOOST_FOREACH ]
+IncludeCategories:
+  - Regex: '^<.*\.h>'
+    Priority: 1
+  - Regex: '^<.*'
+    Priority: 2
+  - Regex: '.*'
+    Priority: 3
+IndentCaseLabels: true
+IndentWidth: 2
+IndentWrappedFunctionNames: false
+KeepEmptyLinesAtTheStartOfBlocks: false
+MacroBlockBegin: ''
+MacroBlockEnd: ''
+MaxEmptyLinesToKeep: 1
+NamespaceIndentation: None
+ObjCBlockIndentWidth: 2
+ObjCSpaceAfterProperty: false
+ObjCSpaceBeforeProtocolList: false
+PenaltyBreakBeforeFirstCallParameter: 1
+PenaltyBreakComment: 300
+PenaltyBreakFirstLessLess: 120
+PenaltyBreakString: 1000
+PenaltyExcessCharacter: 1000000
+PenaltyReturnTypeOnItsOwnLine: 200
+PointerAlignment: Left
+ReflowComments: true
+SortIncludes: true
+SpaceAfterCStyleCast: false
+SpaceBeforeAssignmentOperators: true
+SpaceBeforeParens: ControlStatements
+SpaceInEmptyParentheses: false
+SpacesBeforeTrailingComments: 2
+SpacesInAngles: false
+SpacesInContainerLiterals: true
+SpacesInCStyleCastParentheses: false
+SpacesInParentheses: false
+SpacesInSquareBrackets: false
+Standard: Auto
+TabWidth: 2
+UseTab: Never
+

src/tools/blur/blurtool.cpp

@@ -16,38 +16,76 @@
 //     along with Flameshot.  If not, see <http://www.gnu.org/licenses/>.
 
 #include "blurtool.h"
-#include <QPainter>
+#include <QApplication>
 #include <QGraphicsBlurEffect>
 #include <QGraphicsPixmapItem>
 #include <QGraphicsScene>
-#include <QApplication>
+#include <QImage>
+#include <QPainter>
 
-BlurTool::BlurTool(QObject *parent) : AbstractTwoPointTool(parent) {
+BlurTool::BlurTool(QObject *parent) : AbstractTwoPointTool(parent) {}
 
-}
-
-QIcon BlurTool::icon(const QColor &background, bool inEditor) const {
+QIcon BlurTool::icon(const QColor &background, bool inEditor) const
+{
   Q_UNUSED(inEditor);
   return QIcon(iconPath(background) + "blur.svg");
 }
-QString BlurTool::name() const {
-    return tr("Blur");
-}
+QString BlurTool::name() const { return tr("Blur"); }
 
-QString BlurTool::nameID() {
-    return QLatin1String("");
-}
+QString BlurTool::nameID() { return QLatin1String(""); }
 
-QString BlurTool::description() const {
+QString BlurTool::description() const
+{
   return tr("Set Blur as the paint tool");
 }
 
-CaptureTool* BlurTool::copy(QObject *parent) {
-    return new BlurTool(parent);
+CaptureTool *BlurTool::copy(QObject *parent) { return new BlurTool(parent); }
+
+void write_block(QImage &image, int x_start, int y_start, int pixel_size,
+                 QRgb block_color)
+{
+  assert(x_start + pixel_size < image.width());
+  assert(y_start + pixel_size < image.height());
+
+  for (auto x = x_start; x < x_start + pixel_size; x++)
+  {
+    for (auto y = y_start; y < y_start + pixel_size; y++)
+    {
+      image.setPixel(x, y, block_color);
+    }
+  }
 }
 
-void BlurTool::process(QPainter &painter, const QPixmap &pixmap, bool recordUndo) {
-    if (recordUndo) {
+QRgb calculate_block_averge(QImage &image, int x_start, int y_start,
+                            int pixel_size)
+{
+  assert(x_start + pixel_size < image.width());
+  assert(y_start + pixel_size < image.height());
+
+  auto red_count = 0;
+  auto blue_count = 0;
+  auto green_count = 0;
+  auto pixel_count = 0;
+  for (auto x = x_start; x < x_start + pixel_size; x++)
+  {
+    for (auto y = y_start; y < y_start + pixel_size; y++)
+    {
+      auto pixel = image.pixel(x, y);
+
+      red_count += qRed(pixel);
+      green_count += qGreen(pixel);
+      blue_count += qBlue(pixel);
+      pixel_count++;
+    }
+  }
+  return (qRgb(red_count / pixel_count, green_count / pixel_count,
+               blue_count / pixel_count));
+}
+void BlurTool::process(QPainter &painter, const QPixmap &pixmap,
+                       bool recordUndo)
+{
+  if (recordUndo)
+  {
     updateBackup(pixmap);
   }
   QPoint &p0 = m_points.first;
@@ -57,32 +95,48 @@ void BlurTool::process(QPainter &painter, const QPixmap &pixmap, bool recordUndo
   QRect selection = QRect(p0, p1).normalized();
   QRect selectionScaled = QRect(p0 * pixelRatio, p1 * pixelRatio).normalized();
 
-    QGraphicsBlurEffect *blur = new QGraphicsBlurEffect;
-    blur->setBlurRadius(10);
-    QGraphicsPixmapItem *item = new QGraphicsPixmapItem (
-                pixmap.copy(selectionScaled));
-    item->setGraphicsEffect(blur);
+  QPixmap *source = new QPixmap(pixmap.copy(selectionScaled));
+
+  QImage original_image{source->toImage()};
+  QImage imageResult{source->toImage()};
+  unsigned int pixel_size = m_thickness;
+
+  const unsigned int width = source->width();
+  const unsigned int height = source->height();
+
+  // Don't start pixelating until the region is at least as big as the pixel
+  if ((width > pixel_size) && (height > pixel_size))
+  {
+    for (unsigned int x = 0; x < (width - pixel_size); x += pixel_size)
+    {
+      for (unsigned int y = 0; y < (height - pixel_size); y += pixel_size)
+      {
+        auto block_color =
+          calculate_block_averge(original_image, x, y, pixel_size);
+        write_block(imageResult, x, y, pixel_size, block_color);
+      }
+    }
+  }
+  QPixmap result{QPixmap::fromImage(imageResult)};
 
   QGraphicsScene scene;
-    scene.addItem(item);
+  scene.addPixmap(result);
 
   scene.render(&painter, selection, QRectF());
-    blur->setBlurRadius(12);
-    scene.render(&painter, selection, QRectF());
-    scene.render(&painter, selection, QRectF());
 }
 
-void BlurTool::paintMousePreview(QPainter &painter, const CaptureContext &context) {
+void BlurTool::paintMousePreview(QPainter &painter,
+                                 const CaptureContext &context)
+{
   Q_UNUSED(context);
   Q_UNUSED(painter);
 }
 
-void BlurTool::drawStart(const CaptureContext &context) {
+void BlurTool::drawStart(const CaptureContext &context)
+{
   m_thickness = context.thickness;
   m_points.first = context.mousePos;
   m_points.second = context.mousePos;
 }
 
-void BlurTool::pressed(const CaptureContext &context) {
-    Q_UNUSED(context);
-}
+void BlurTool::pressed(const CaptureContext &context) { Q_UNUSED(context); }