Added new graphics stuff, adjusted build process

2013-12-06 18:29:55 +11:00
parent a3a990cc01
commit fc2b67608f
11 changed files with 218 additions and 5 deletions
@@ -0,0 +1,145 @@
+/* Copyright: (c) Kayne Ruse 2013
+ * 
+ * This software is provided 'as-is', without any express or implied
+ * warranty. In no event will the authors be held liable for any damages
+ * arising from the use of this software.
+ * 
+ * Permission is granted to anyone to use this software for any purpose,
+ * including commercial applications, and to alter it and redistribute it
+ * freely, subject to the following restrictions:
+ * 
+ * 1. The origin of this software must not be misrepresented; you must not
+ * claim that you wrote the original software. If you use this software
+ * in a product, an acknowledgment in the product documentation would be
+ * appreciated but is not required.
+ * 
+ * 2. Altered source versions must be plainly marked as such, and must not be
+ * misrepresented as being the original software.
+ * 
+ * 3. This notice may not be removed or altered from any source
+ * distribution.
+*/
+#include "image.hpp"
+
+#include <stdexcept>
+#include <sstream>
+
+Image& Image::operator=(Image const& rhs) {
+	//don't screw yourself
+	if (this == &rhs) {
+		return *this;
+	}
+
+	FreeSurface();
+
+	//Copy the other Image's stuff
+	surface = rhs.surface;
+	clip = rhs.clip;
+	local = false;
+}
+
+Image& Image::operator=(Image&& rhs) {
+	//don't screw yourself
+	if (this == &rhs) {
+		return *this;
+	}
+
+	FreeSurface();
+
+	//Steal the other Image's stuff
+	surface = rhs.surface;
+	clip = rhs.clip;
+	local = rhs.local;
+
+	rhs.surface = nullptr;
+	rhs.clip = {0, 0, 0, 0};
+	rhs.local = false;
+}
+
+SDL_Surface* Image::LoadSurface(std::string fname) {
+	FreeSurface();
+	SDL_Surface* p = SDL_LoadBMP(fname.c_str());
+	if (!p) {
+		std::ostringstream os;
+		os << "Failed to load file: " << fname;
+		throw(std::runtime_error(os.str()));
+	}
+	surface = p;
+	clip = {0, 0, (Uint16)surface->w, (Uint16)surface->h};
+	local = true;
+	SetTransparentColor(255, 0, 255); //default
+	return surface;
+}
+
+SDL_Surface* Image::CreateSurface(Uint16 w, Uint16 h) {
+	FreeSurface();
+	Uint32 rmask, gmask, bmask, amask;
+#if SDL_BYTEORDER == SDL_BIG_ENDIAN
+    rmask = 0xff000000;
+    gmask = 0x00ff0000;
+    bmask = 0x0000ff00;
+    amask = 0x000000ff;
+#else
+    rmask = 0x000000ff;
+    gmask = 0x0000ff00;
+    bmask = 0x00ff0000;
+    amask = 0xff000000;
+#endif
+	SDL_Surface* p = SDL_CreateRGBSurface(SDL_SWSURFACE, w, h, 32, rmask, gmask, bmask, amask);
+	if (!p) {
+		throw(std::runtime_error("Failed to create Image surface"));
+	}
+	surface = p;
+	clip = {0, 0, (Uint16)surface->w, (Uint16)surface->h};
+	local = true;
+	SetTransparentColor(255, 0, 255); //default
+	return surface;
+}
+
+SDL_Surface* Image::SetSurface(SDL_Surface* p) {
+	FreeSurface();
+	if (!p) {
+		throw(std::invalid_argument("No surface pointer provided"));
+	}
+	surface = p;
+	clip = {0, 0, (Uint16)surface->w, (Uint16)surface->h};
+	local = false;
+	return surface;
+}
+
+void Image::FreeSurface() {
+	if (local) {
+		SDL_FreeSurface(surface);
+		local = false;
+	}
+	surface = nullptr;
+	clip = {0, 0, 0, 0};
+}
+
+void Image::DrawTo(SDL_Surface* dest, Sint16 x, Sint16 y) {
+	if (!surface) {
+		throw(std::logic_error("No image surface to draw"));
+	}
+	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"));
+	}
+	if (!local) {
+		throw(std::logic_error("Cannot set the transparent color of a non-local surface"));
+	}
+	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"));
+	}
+	if (!local) {
+		throw(std::logic_error("Cannot clear the transparent color of a non-local surface"));
+	}
+	SDL_SetColorKey(surface, 0, 0);
+}