Kayne Ruse
146 lines
3.7 KiB
C++
146 lines
3.7 KiB
C++
/* Copyright: (c) Kayne Ruse 2013-2015
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*
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* This software is provided 'as-is', without any express or implied
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* warranty. In no event will the authors be held liable for any damages
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* arising from the use of this software.
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*
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* Permission is granted to anyone to use this software for any purpose,
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* including commercial applications, and to alter it and redistribute it
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* freely, subject to the following restrictions:
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*
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* 1. The origin of this software must not be misrepresented; you must not
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* claim that you wrote the original software. If you use this software
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* in a product, an acknowledgment in the product documentation would be
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* appreciated but is not required.
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*
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* 2. Altered source versions must be plainly marked as such, and must not be
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* misrepresented as being the original software.
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*
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* 3. This notice may not be removed or altered from any source
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* distribution.
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*/
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#include "image.hpp"
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#include <stdexcept>
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#include <sstream>
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Image& Image::operator=(Image const& rhs) {
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//don't screw yourself
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if (this == &rhs) {
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return *this;
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}
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FreeSurface();
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//Copy the other Image's stuff
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surface = rhs.surface;
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clip = rhs.clip;
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local = false;
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}
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Image& Image::operator=(Image&& rhs) {
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//don't screw yourself
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if (this == &rhs) {
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return *this;
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}
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FreeSurface();
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//Steal the other Image's stuff
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surface = rhs.surface;
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clip = rhs.clip;
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local = rhs.local;
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rhs.surface = nullptr;
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rhs.clip = {0, 0, 0, 0};
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rhs.local = false;
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}
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SDL_Surface* Image::LoadSurface(std::string fname) {
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FreeSurface();
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SDL_Surface* p = SDL_LoadBMP(fname.c_str());
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if (!p) {
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std::ostringstream os;
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os << "Failed to load file: " << fname;
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throw(std::runtime_error(os.str()));
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}
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surface = p;
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clip = {0, 0, (Uint16)surface->w, (Uint16)surface->h};
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local = true;
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SetTransparentColor(255, 0, 255); //default
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return surface;
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}
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SDL_Surface* Image::CreateSurface(Uint16 w, Uint16 h) {
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FreeSurface();
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Uint32 rmask, gmask, bmask, amask;
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#if SDL_BYTEORDER == SDL_BIG_ENDIAN
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rmask = 0xff000000;
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gmask = 0x00ff0000;
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bmask = 0x0000ff00;
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amask = 0x000000ff;
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#else
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rmask = 0x000000ff;
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gmask = 0x0000ff00;
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bmask = 0x00ff0000;
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amask = 0xff000000;
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#endif
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SDL_Surface* p = SDL_CreateRGBSurface(SDL_SWSURFACE, w, h, 32, rmask, gmask, bmask, amask);
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if (!p) {
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throw(std::runtime_error("Failed to create Image surface"));
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}
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surface = p;
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clip = {0, 0, (Uint16)surface->w, (Uint16)surface->h};
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local = true;
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SetTransparentColor(255, 0, 255); //default
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return surface;
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}
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SDL_Surface* Image::SetSurface(SDL_Surface* p) {
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FreeSurface();
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if (!p) {
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throw(std::invalid_argument("No surface pointer provided"));
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}
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surface = p;
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clip = {0, 0, (Uint16)surface->w, (Uint16)surface->h};
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local = false;
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return surface;
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}
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void Image::FreeSurface() {
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if (local) {
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SDL_FreeSurface(surface);
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local = false;
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}
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surface = nullptr;
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clip = {0, 0, 0, 0};
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}
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void Image::DrawTo(SDL_Surface* dest, Sint16 x, Sint16 y) {
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if (!surface) {
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throw(std::logic_error("No image surface to draw"));
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}
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SDL_Rect sclip = clip, dclip = {x,y};
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SDL_BlitSurface(surface, &sclip, dest, &dclip);
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}
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void Image::SetTransparentColor(Uint8 r, Uint8 g, Uint8 b) {
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if (!surface) {
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throw(std::logic_error("Failed to set the transparent color"));
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}
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if (!local) {
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throw(std::logic_error("Cannot set the transparent color of a non-local surface"));
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}
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SDL_SetColorKey(surface, SDL_SRCCOLORKEY, SDL_MapRGB(surface->format, r, g, b));
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}
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void Image::ClearTransparentColor() {
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if (!surface) {
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throw(std::logic_error("Failed to clear the transparent color"));
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}
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if (!local) {
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throw(std::logic_error("Cannot clear the transparent color of a non-local surface"));
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}
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SDL_SetColorKey(surface, 0, 0);
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}
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