RECORDER: Implement Events Recorder

1 files changed, 52 insertions, 1 deletions

diff --git a/graphics/thumbnail.cpp b/graphics/thumbnail.cpp
index ddb377306d..d04c218624 100644
--- a/graphics/thumbnail.cpp
+++ b/graphics/thumbnail.cpp
@@ -23,6 +23,7 @@
 #include "graphics/scaler.h"
 #include "graphics/colormasks.h"
 #include "common/endian.h"
+#include "common/algorithm.h"
 #include "common/system.h"
 #include "common/stream.h"
 #include "common/textconsole.h"
@@ -143,7 +144,6 @@ Graphics::Surface *loadThumbnail(Common::SeekableReadStream &in) {
 			assert(0);
 		}
 	}
-
 	return to;
 }
 
@@ -216,4 +216,55 @@ bool saveThumbnail(Common::WriteStream &out, const Graphics::Surface &thumb) {
 	return true;
 }
 
+
+/**
+ * Returns an array indicating which pixels of a source image horizontally or vertically get
+ * included in a scaled image
+ */
+int *scaleLine(int size, int srcSize) {
+	int scale = 100 * size / srcSize;
+	assert(scale > 0);
+	int *v = new int[size];
+	Common::fill(v, &v[size], 0);
+
+	int distCtr = 0;
+	int *destP = v;
+	for (int distIndex = 0; distIndex < srcSize; ++distIndex) {
+		distCtr += scale;
+		while (distCtr >= 100) {
+			assert(destP < &v[size]);
+			*destP++ = distIndex;
+			distCtr -= 100;
+		}
+	}
+
+	return v;
+}
+
+Graphics::Surface *scale(const Graphics::Surface &srcImage, int xSize, int ySize) {
+	Graphics::Surface *s = new Graphics::Surface();
+	s->create(xSize, ySize, srcImage.format);
+
+	int *horizUsage = scaleLine(xSize, srcImage.w);
+	int *vertUsage = scaleLine(ySize, srcImage.h);
+
+	// Loop to create scaled version
+	for (int yp = 0; yp < ySize; ++yp) {
+		const byte *srcP = (const byte *)srcImage.getBasePtr(0, vertUsage[yp]);
+		byte *destP = (byte *)s->getBasePtr(0, yp);
+
+		for (int xp = 0; xp < xSize; ++xp) {
+			const byte *tempSrcP = srcP + (horizUsage[xp] * srcImage.format.bytesPerPixel);
+			for (int byteCtr = 0; byteCtr < srcImage.format.bytesPerPixel; ++byteCtr) {
+				*destP++ = *tempSrcP++;
+			}
+		}
+	}
+
+	// Delete arrays and return surface
+	delete[] horizUsage;
+	delete[] vertUsage;
+	return s;
+}
+
 } // End of namespace Graphics