From 823a82611d37e618a4734ea480fab4c60b73f5b7 Mon Sep 17 00:00:00 2001
From: piernov <piernov@piernov.org>
Date: Thu, 18 Aug 2016 14:13:40 +0200
Subject: Initial Import

---
 display.cpp | 55 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 55 insertions(+)
 create mode 100755 display.cpp

(limited to 'display.cpp')

diff --git a/display.cpp b/display.cpp
new file mode 100755
index 0000000..6422030
--- /dev/null
+++ b/display.cpp
@@ -0,0 +1,55 @@
+#include "logging.h"
+#include "display.h"
+
+display screen;
+
+/**
+* Loads a BMP image into a texture on the rendering device
+* @param file The BMP image file to load
+* @param ren The renderer to load the texture onto
+* @return the loaded texture, or nullptr if something went wrong.
+*/
+SDL_Texture* loadTexture(const std::string &file, SDL_Renderer *ren){
+	SDL_Log("loadTexture %s", file.c_str());
+	//Initialize to nullptr to avoid dangling pointer issues
+	SDL_Texture *texture = nullptr;
+	//Load the image
+	SDL_Surface *loadedImage = IMG_Load(file.c_str());
+	//If the loading went ok, convert to texture and return the texture
+	if (loadedImage != nullptr){
+		texture = SDL_CreateTextureFromSurface(ren, loadedImage);
+		SDL_FreeSurface(loadedImage);
+		//Make sure converting went ok too
+		if (texture == nullptr)
+			logSDLError("CreateTextureFromSurface");
+	}
+	else
+		logSDLError("IMG_Load");
+
+	return texture;
+}
+
+/**
+* Draw an SDL_Texture to an SDL_Renderer at position x, y, preserving
+* the texture's width and height
+* @param tex The source texture we want to draw
+* @param ren The renderer we want to draw too
+* @param x The x coordinate to draw too
+* @param y The y coordinate to draw too
+* @param angle The angle of rotation
+*/
+void renderTexture(SDL_Texture *tex, SDL_Renderer *ren, float x, float y, double angle){
+	//Setup the destination rectangle to be at the position we want
+	SDL_Rect dst;
+	dst.x = x*screen.width;
+	dst.y = y*screen.height;
+	//Query the texture to get its width and height to use
+	SDL_QueryTexture(tex, NULL, NULL, &dst.w, &dst.h);
+	SDL_RenderCopyEx(ren, tex, NULL, &dst, angle, NULL, SDL_FLIP_NONE);
+}
+
+void renderTexture(SDL_Texture *tex, SDL_Renderer *ren, float x, float y){
+	renderTexture(tex, ren, x, y, 0);
+}
+
+
-- 
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