--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/javauis/eswt_qt/org.eclipse.swt/Eclipse_SWT_PI/qt/library/graphics/gfxutils.cpp Mon May 03 12:27:20 2010 +0300
@@ -0,0 +1,321 @@
+/*******************************************************************************
+ * Copyright (c) 2008 Nokia Corporation and/or its subsidiary(-ies).
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ * Nokia Corporation - initial API and implementation
+ *******************************************************************************/
+#include <QDebug>
+#include <QFont>
+#include <QFontMetrics>
+#include <QSharedDataPointer>
+#include <QRect>
+#include <QImage>
+#include "gfxutils.h"
+
+namespace Java { namespace GFX {
+
+//
+// CollisionDetection
+//
+
+#define HANDLE_TO_POINTER(type, variable, handle) type variable = reinterpret_cast<type>( handle )
+
+/*static*/ bool gfxUtils::detectCollision(int aImage1PixmapHandle, int aTransform1, int aP1x, int aP1y, int aR1x1, int aR1y1, int aR1x2, int aR1y2,
+ int aImage2PixmapHandle, int aTransform2, int aP2x, int aP2y, int aR2x1, int aR2y1, int aR2x2, int aR2y2)
+{
+ // Calculate the intersection of collisionRectangles:
+ QRect rect1(aP1x, aP1y, aR1x2 - aR1x1, aR1y2 - aR1y1);
+ QRect rect2(aP2x, aP2y, aR2x2 - aR2x1, aR2y2 - aR2y1);
+ QRect rect3 = rect1.intersected(rect2);
+
+ // Save intersection to collisionRectangles:
+ aR1x1 += rect3.x() - aP1x;
+ aR1y1 += rect3.y() - aP1y;
+ aR1x2 = aR1x1 + rect3.width();
+ aR1y2 = aR1y1 + rect3.height();
+ aR2x1 += rect3.x() - aP2x;
+ aR2y1 += rect3.y() - aP2y;
+ aR2x2 = aR2x1 + rect3.width();
+ aR2y2 = aR2y1 + rect3.height();
+
+ // Get image's pixel data:
+ HANDLE_TO_POINTER(QPixmap*, image1, aImage1PixmapHandle);
+ QImage qimage1 = image1->toImage();
+ const unsigned char* data1 = qimage1.bits();
+ int totalWidth1 = qimage1.width();
+
+ HANDLE_TO_POINTER(QPixmap*, image2, aImage2PixmapHandle);
+ QImage qimage2 = image2->toImage();
+ const unsigned char* data2 = qimage2.bits();
+ int totalWidth2 = qimage2.width();
+
+ // These rectangles defines areas to be checked.
+ QRect image1Rect(aR1x1, aR1y1, aR1x2 - aR1x1, aR1y2 - aR1y1);
+ QRect image2Rect(aR2x1, aR2y1, aR2x2 - aR2x1, aR2y2 - aR2y1);
+
+ // Following variables define how much we need to increase or
+ // decrease x and y in every loop round:
+ int rect1XInc = 0;
+ int rect1YInc = 0;
+ int rect2XInc = 0;
+ int rect2YInc = 0;
+
+ // These defines how much we need to increment/decrement x and y
+ // when moving to next line:
+ int rect1XLineInc = 0;
+ int rect1YLineInc = 0;
+ int rect2XLineInc = 0;
+ int rect2YLineInc = 0;
+
+ // These variables contains the coordinates of the pixel we are
+ // checking:
+ int rect1X = 0;
+ int rect1Y = 0;
+ int rect2X = 0;
+ int rect2Y = 0;
+
+ // Tells where to start:
+ int rect1XStart = 0;
+ int rect1YStart = 0;
+ int rect2XStart = 0;
+ int rect2YStart = 0;
+
+ // Position of last pixel.
+ int rect1XEnd = 0;
+ int rect1YEnd = 0;
+ int rect2XEnd = 0;
+ int rect2YEnd = 0;
+
+ switch(aTransform1) {
+ case 0: // TRANS_NONE:
+ rect1XInc = 1;
+ rect1YInc = 0;
+ rect1XLineInc = 0;
+ rect1YLineInc = 1;
+ rect1XStart = image1Rect.x();
+ rect1YStart = image1Rect.y();
+ rect1XEnd = image1Rect.x() + image1Rect.width() - 1;
+ rect1YEnd = image1Rect.y() + image1Rect.height() - 1;
+ break;
+ case 5: // TRANS_ROT90:
+ rect1XInc = 0;
+ rect1YInc = 1;
+ rect1XLineInc = -1;
+ rect1YLineInc = 0;
+ rect1XStart = image1Rect.x() + image1Rect.width() -1;
+ rect1YStart = image1Rect.y();
+ rect1XEnd = image1Rect.x();
+ rect1YEnd = image1Rect.y() + image1Rect.width() - 1;
+ break;
+ case 3: // TRANS_ROT180:
+ rect1XInc = -1;
+ rect1YInc = 0;
+ rect1XLineInc = 0;
+ rect1YLineInc = -1;
+ rect1XStart = image1Rect.x() + image1Rect.width() -1;
+ rect1YStart = image1Rect.y() + image1Rect.height() - 1;
+ rect1XEnd = image1Rect.x();
+ rect1YEnd = image1Rect.y();
+ break;
+ case 6: // TRANS_ROT270:
+ rect1XInc = 0;
+ rect1YInc = -1;
+ rect1XLineInc = 1;
+ rect1YLineInc = 0;
+ rect1XStart = image1Rect.x();
+ rect1YStart = image1Rect.y() + image1Rect.height() - 1;
+ rect1XEnd = image1Rect.x() + image1Rect.height() - 1;
+ rect1YEnd = image1Rect.y();
+ break;
+ case 2: // TRANS_MIRROR:
+ rect1XInc = -1;
+ rect1YInc = 0;
+ rect1XLineInc = 0;
+ rect1YLineInc = 1;
+ rect1XStart = image1Rect.x() + image1Rect.width() - 1;
+ rect1YStart = image1Rect.y();
+ rect1XEnd = image1Rect.x();
+ rect1YEnd = image1Rect.y() + image1Rect.height() - 1;
+ break;
+ case 7: // TRANS_MIRROR_ROT90:
+ rect1XInc = 0;
+ rect1YInc = -1;
+ rect1XLineInc = -1;
+ rect1YLineInc = 0;
+ rect1XStart = image1Rect.x() + image1Rect.width() -1;
+ rect1YStart = image1Rect.y() + image1Rect.height() - 1;
+ rect1XEnd = image1Rect.x();
+ rect1YEnd = image1Rect.y();
+ break;
+ case 1: // TRANS_MIRROR_ROT180:
+ rect1XInc = 1;
+ rect1YInc = 0;
+ rect1XLineInc = 0;
+ rect1YLineInc = -1;
+ rect1XStart = image1Rect.x();
+ rect1YStart = image1Rect.y() + image1Rect.height() - 1;
+ rect1XEnd = image1Rect.x() + image1Rect.width() - 1;
+ rect1YEnd = image1Rect.y();
+ break;
+ case 4: // TRANS_MIRROR_ROT270:
+ rect1XInc = 0;
+ rect1YInc = 1;
+ rect1XLineInc = 1;
+ rect1YLineInc = 0;
+ rect1XStart = image1Rect.x();
+ rect1YStart = image1Rect.y();
+ rect1XEnd = image1Rect.x() + image1Rect.height() - 1;
+ rect1YEnd = image1Rect.y() + image1Rect.width() - 1;
+ break;
+ default:
+ break;
+ }
+
+ switch(aTransform2) {
+ case 0: // TRANS_NONE:
+ rect2XInc = 1;
+ rect2YInc = 0;
+ rect2XLineInc = 0;
+ rect2YLineInc = 1;
+ rect2XStart = image2Rect.x();
+ rect2YStart = image2Rect.y();
+ rect2XEnd = image2Rect.x() + image2Rect.width() - 1;
+ rect2YEnd = image2Rect.y() + image2Rect.height() - 1;
+ break;
+ case 5: // TRANS_ROT90:
+ rect2XInc = 0;
+ rect2YInc = 1;
+ rect2XLineInc = -1;
+ rect2YLineInc = 0;
+ rect2XStart = image2Rect.x() + image2Rect.width() -1;
+ rect2YStart = image2Rect.y();
+ rect2XEnd = image2Rect.x();
+ rect2YEnd = image2Rect.y() + image2Rect.width() - 1;
+ break;
+ case 3: // TRANS_ROT180:
+ rect2XInc = -1;
+ rect2YInc = 0;
+ rect2XLineInc = 0;
+ rect2YLineInc = -1;
+ rect2XStart = image2Rect.x() + image2Rect.width() -1;
+ rect2YStart = image2Rect.y() + image2Rect.height() - 1;
+ rect2XEnd = image2Rect.x();
+ rect2YEnd = image2Rect.y();
+ break;
+ case 6: // TRANS_ROT270:
+ rect2XInc = 0;
+ rect2YInc = -1;
+ rect2XLineInc = 1;
+ rect2YLineInc = 0;
+ rect2XStart = image2Rect.x();
+ rect2YStart = image2Rect.y() + image2Rect.height() - 1;
+ rect2XEnd = image2Rect.x() + image2Rect.height() - 1;
+ rect2YEnd = image2Rect.y();
+ break;
+ case 2: // TRANS_MIRROR:
+ rect2XInc = -1;
+ rect2YInc = 0;
+ rect2XLineInc = 0;
+ rect2YLineInc = 1;
+ rect2XStart = image2Rect.x() + image2Rect.width() - 1;
+ rect2YStart = image2Rect.y();
+ rect2XEnd = image2Rect.x();
+ rect2YEnd = image2Rect.y() + image2Rect.height() - 1;
+ break;
+ case 7: // TRANS_MIRROR_ROT90:
+ rect2XInc = 0;
+ rect2YInc = -1;
+ rect2XLineInc = -1;
+ rect2YLineInc = 0;
+ rect2XStart = image2Rect.x() + image2Rect.width() -1;
+ rect2YStart = image2Rect.y() + image2Rect.height() - 1;
+ rect2XEnd = image2Rect.x();
+ rect2YEnd = image2Rect.y();
+ break;
+ case 1: // TRANS_MIRROR_ROT180:
+ rect2XInc = 1;
+ rect2YInc = 0;
+ rect2XLineInc = 0;
+ rect2YLineInc = -1;
+ rect2XStart = image2Rect.x();
+ rect2YStart = image2Rect.y() + image2Rect.height() - 1;
+ rect2XEnd = image2Rect.x() + image2Rect.width() - 1;
+ rect2YEnd = image2Rect.y();
+ break;
+ case 4: // TRANS_MIRROR_ROT270:
+ rect2XInc = 0;
+ rect2YInc = 1;
+ rect2XLineInc = 1;
+ rect2YLineInc = 0;
+ rect2XStart = image2Rect.x();
+ rect2YStart = image2Rect.y();
+ rect2XEnd = image2Rect.x() + image2Rect.height() - 1;
+ rect2YEnd = image2Rect.y() + image2Rect.width() - 1;
+ break;
+ default:
+ break;
+ }
+
+
+ rect1X = rect1XStart;
+ rect1Y = rect1YStart;
+ rect2X = rect2XStart;
+ rect2Y = rect2YStart;
+
+ // Go through the intersection area pixel by pixel.
+ // Following code assumes that format is 32-bit RGBA or 32-bit RGB.
+ while(true) {
+ // Check is there hit:
+ if(data1[rect1Y * totalWidth1 * 4 + rect1X * 4 + 3]) {
+ if(data2[rect2Y * totalWidth2 * 4 + rect2X * 4 + 3]) {
+ return true;
+ }
+ }
+
+ if((rect1X == rect1XEnd) && (rect1Y == rect1YEnd)) {
+ // Done, no hit:
+ return false;
+ }
+
+ // Move to next line if in the end:
+ if(rect1XLineInc == 0) {
+ if(rect1X == rect1XEnd) {
+ rect1X = rect1XStart - rect1XInc;
+ rect1Y += rect1YLineInc;
+ }
+ }
+ else {
+ if(rect1Y == rect1YEnd) {
+ rect1Y = rect1YStart - rect1YInc;
+ rect1X += rect1XLineInc;
+ }
+ }
+
+ if(rect2XLineInc == 0) {
+ if(rect2X == rect2XEnd) {
+ rect2X = rect2XStart - rect2XInc;
+ rect2Y += rect2YLineInc;
+ }
+ }
+ else {
+ if(rect2Y == rect2YEnd) {
+ rect2Y = rect2YStart - rect2YInc;
+ rect2X += rect2XLineInc;
+ }
+ }
+
+ // Move to next pixel:
+ rect1X += rect1XInc;
+ rect1Y += rect1YInc;
+ rect2X += rect2XInc;
+ rect2Y += rect2YInc;
+ }
+}
+
+} // namespace GFX
+} // namespace Java
+