Add iV_Image::compare_equal

Warzone2100 · Sep 1, 2023 · 770d682 · 770d682
1 parent 7f201f5
commit 770d682
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diff --git a/lib/ivis_opengl/pieimage.cpp b/lib/ivis_opengl/pieimage.cpp
@@ -561,3 +561,22 @@ bool iV_Image::convert_color_order(ColorOrder newOrder)
 	m_colorOrder = newOrder;
 	return true;
 }
+
+bool iV_Image::compare_equal(const iV_Image& other)
+{
+	if (m_width != other.m_width || m_height != other.m_height || m_channels != other.m_channels)
+	{
+		return false;
+	}
+	if (m_colorOrder != other.m_colorOrder)
+	{
+		return false;
+	}
+	if ((m_bmp == nullptr || other.m_bmp == nullptr) && (m_bmp != other.m_bmp))
+	{
+		return false;
+	}
+
+	const size_t sizeOfBuffers = sizeof(unsigned char) * m_width * m_height * m_channels;
+	return memcmp(m_bmp, other.m_bmp, sizeOfBuffers) == 0;
+}
diff --git a/lib/ivis_opengl/pietypes.h b/lib/ivis_opengl/pietypes.h
@@ -243,6 +243,8 @@ class iV_Image final : public iV_BaseImage
 
 	bool convert_color_order(ColorOrder newOrder);
 
+	bool compare_equal(const iV_Image& other);
+
 private:
 	bool resizeInternal(const iV_Image& source, int output_w, int output_h, optional<int> alphaChannelOverride = nullopt);