From 65135b4b8646e6cc9c46a56e29f8f7d1c5403c6a Mon Sep 17 00:00:00 2001
From: Kayne Ruse <ratstail91@yahoo.com.au>
Date: Fri, 19 Jul 2013 14:06:10 +1000
Subject: [PATCH] Codebase update: Added transparency control to Image

---
 common/image.cpp | 15 +++++++++++++++
 common/image.hpp |  3 +++
 2 files changed, 18 insertions(+)

diff --git a/common/image.cpp b/common/image.cpp
index 9d8669c..b0da00f 100644
--- a/common/image.cpp
+++ b/common/image.cpp
@@ -29,6 +29,7 @@ SDL_Surface* Image::LoadSurface(std::string fname) {
 		throw(std::runtime_error(std::string() + "Failed to load file: " + fname));
 	}
 	surface = p;
+	SetTransparentColor(255, 0, 255); //default
 	clip = {0, 0, (Uint16)surface->w, (Uint16)surface->h};
 	local = true;
 	return surface;
@@ -60,3 +61,17 @@ void Image::DrawTo(SDL_Surface* dest, Sint16 x, Sint16 y) {
 	SDL_Rect sclip = clip, dclip = {x,y};
 	SDL_BlitSurface(surface, &sclip, dest, &dclip);
 }
+
+void Image::SetTransparentColor(Uint8 r, Uint8 g, Uint8 b) {
+	if (!surface) {
+		throw(std::logic_error("Failed to set the transparent color"));
+	}
+	SDL_SetColorKey(surface, SDL_SRCCOLORKEY, SDL_MapRGB(surface->format, r, g, b));
+}
+
+void Image::ClearTransparentColor() {
+	if (!surface) {
+		throw(std::logic_error("Failed to clear the transparent color"));
+	}
+	SDL_SetColorKey(surface, 0, 0);
+}
diff --git a/common/image.hpp b/common/image.hpp
index 463e382..ca3980b 100644
--- a/common/image.hpp
+++ b/common/image.hpp
@@ -54,6 +54,9 @@ public:
 	Uint16 GetClipH() const { return clip.h; }
 
 	bool GetLocal() { return local; }
+
+	void SetTransparentColor(Uint8 r, Uint8 g, Uint8 b);
+	void ClearTransparentColor();
 protected:
 	SDL_Surface* surface = nullptr;
 	SDL_Rect clip = {0, 0, 0, 0};