Initial commit

2015-07-07 23:47:51 +10:00
commit 56ae0a13c9
26 changed files with 2077 additions and 0 deletions
@@ -0,0 +1,184 @@
+/* Copyright: (c) Kayne Ruse 2013-2015
+ * 
+ * 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 "SDL2/SDL_image.h"
+
+#include <sstream>
+#include <stdexcept>
+
+Image& Image::operator=(Image const& rhs) {
+	//don't screw yourself
+	if (this == &rhs) {
+		return *this;
+	}
+
+	Free();
+
+	//Copy the other Image's stuff
+	texture = rhs.texture;
+	clip = rhs.clip;
+	local = false;
+}
+
+Image& Image::operator=(Image&& rhs) {
+	//don't screw yourself
+	if (this == &rhs) {
+		return *this;
+	}
+
+	Free();
+
+	//Steal the other Image's stuff
+	texture = rhs.texture;
+	clip = rhs.clip;
+	local = rhs.local;
+
+	rhs.texture = nullptr;
+	rhs.clip = {0, 0, 0, 0};
+	rhs.local = false;
+}
+
+SDL_Texture* Image::Load(SDL_Renderer* renderer, std::string fname) {
+	Free();
+
+	//load the file into a surface
+	SDL_Surface* surface = IMG_Load(fname.c_str());
+	if (!surface) {
+		std::ostringstream msg;
+		msg << "Failed to load an image file: " << fname;
+		msg << "; " << IMG_GetError();
+		throw(std::runtime_error(msg.str()));
+	}
+
+	//create a texture from this surface
+	texture = SDL_CreateTextureFromSurface(renderer, surface);
+	if (!texture) {
+		std::ostringstream msg;
+		msg << "Failed to convert a newly loaded image file: " << fname;
+		msg << "; " << SDL_GetError();
+		throw(std::runtime_error(msg.str()));
+	}
+
+	//set the metadata
+	clip.x = 0;
+	clip.y = 0;
+	if (SDL_QueryTexture(texture, nullptr, nullptr, &clip.w, &clip.h)) {
+		std::ostringstream msg;
+		msg << "Failed to record metadata for a newly loaded image file: " << fname;
+		msg << "; " << SDL_GetError();
+		throw(std::runtime_error(msg.str()));
+	}
+	local = true;
+
+	//free the surface & return
+	SDL_FreeSurface(surface);
+	return texture;
+}
+
+SDL_Texture* Image::Create(SDL_Renderer* renderer, Uint16 w, Uint16 h) {
+	Free();
+
+	//make the texture
+	texture = SDL_CreateTexture(renderer,
+		SDL_PIXELFORMAT_RGBA8888,
+		SDL_TEXTUREACCESS_STATIC,
+		w, h);
+
+	if (!texture) {
+		std::ostringstream msg;
+		msg << "Failed to create a texture; " << SDL_GetError();
+		throw(std::runtime_error(msg.str()));
+	}
+
+	//set the metadata
+	clip.x = 0;
+	clip.y = 0;
+	if (SDL_QueryTexture(texture, nullptr, nullptr, &clip.w, &clip.h)) {
+		std::ostringstream msg;
+		msg << "Failed to record metadata for a newly created image";
+		msg << "; " << SDL_GetError();
+		throw(std::runtime_error(msg.str()));
+	}
+	local = true;
+
+	return texture;
+}
+
+SDL_Texture* Image::SetTexture(SDL_Texture* ptr) {
+	Free();
+
+	texture = ptr;
+
+	//set the metadata
+	clip.x = 0;
+	clip.y = 0;
+	if (SDL_QueryTexture(texture, nullptr, nullptr, &clip.w, &clip.h)) {
+		std::ostringstream msg;
+		msg << "Failed to record metadata for a newly image image";
+		msg << "; " << SDL_GetError();
+		throw(std::runtime_error(msg.str()));
+	}
+	local = false;
+
+	return texture;
+}
+
+SDL_Texture* Image::GetTexture() const {
+	return texture;
+}
+
+void Image::Free() {
+	if (local) {
+		SDL_DestroyTexture(texture);
+		local = false;
+	}
+	texture = nullptr;
+	clip = {0, 0, 0, 0};
+}
+
+void Image::DrawTo(SDL_Renderer* const renderer, Sint16 x, Sint16 y, double scaleX, double scaleY) {
+	if (!texture) {
+		throw(std::logic_error("No image texture to draw"));
+	}
+	SDL_Rect sclip = clip;
+	SDL_Rect dclip = {x, y, Uint16(clip.w * scaleX), Uint16(clip.h * scaleY)};
+	SDL_RenderCopy(renderer, texture, &sclip, &dclip);
+}
+
+void Image::SetAlpha(Uint8 a) {
+	if (SDL_SetTextureAlphaMod(texture, a)) {
+		std::ostringstream msg;
+		msg << "Failed to set alpha; " << SDL_GetError();
+		throw(std::runtime_error(msg.str()));
+	}
+}
+
+Uint8 Image::GetAlpha() {
+	Uint8 ret = 0;
+	if (SDL_GetTextureAlphaMod(texture, &ret)) {
+		std::ostringstream msg;
+		msg << "Failed to get alpha; " << SDL_GetError();
+		throw(std::runtime_error(msg.str()));
+	}
+	return ret;
+}
@@ -0,0 +1,72 @@
+/* Copyright: (c) Kayne Ruse 2013-2015
+ * 
+ * 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.
+*/
+#pragma once
+
+#include "SDL2/SDL.h"
+
+#include <string>
+
+class Image {
+public:
+	Image() = default;
+	Image(Image const& rhs) { *this = rhs; }
+	Image(Image&& rhs) { *this = std::move(rhs); }
+	Image(SDL_Renderer* r, std::string fname) { Load(r, fname); }
+	Image(SDL_Renderer* r, Uint16 w, Uint16 h) { Create(r, w, h); }
+	Image(SDL_Texture* p) { SetTexture(p); }
+	virtual ~Image() { Free(); }
+
+	Image& operator=(Image const&);
+	Image& operator=(Image&&);
+
+	SDL_Texture* Load(SDL_Renderer* renderer, std::string fname);
+	SDL_Texture* Create(SDL_Renderer* renderer, Uint16 w, Uint16 h);
+	SDL_Texture* SetTexture(SDL_Texture*);
+	SDL_Texture* GetTexture() const;
+	virtual void Free();
+
+	void DrawTo(SDL_Renderer* const, Sint16 x, Sint16 y, double scaleX = 1.0, double scaleY = 1.0);
+
+	void SetAlpha(Uint8 a);
+	Uint8 GetAlpha();
+
+	//Clip handlers
+	SDL_Rect SetClip(SDL_Rect r) { return clip = r; }
+	SDL_Rect GetClip() const { return clip; }
+
+	Sint16 SetClipX(Sint16 x) { return clip.x = x; }
+	Sint16 SetClipY(Sint16 y) { return clip.y = y; }
+	Uint16 SetClipW(Uint16 w) { return clip.w = w; }
+	Uint16 SetClipH(Uint16 h) { return clip.h = h; }
+
+	Sint16 GetClipX() const { return clip.x; }
+	Sint16 GetClipY() const { return clip.y; }
+	Uint16 GetClipW() const { return clip.w; }
+	Uint16 GetClipH() const { return clip.h; }
+
+	bool GetLocal() const { return local; }
+
+protected:
+	SDL_Texture* texture = nullptr;
+	SDL_Rect clip = {0, 0, 0, 0};
+	bool local = false;
+};
@@ -0,0 +1,32 @@
+#config
+INCLUDES+=.
+LIBS+=
+CXXFLAGS+=-std=c++11 $(addprefix -I,$(INCLUDES))
+
+#source
+CXXSRC=$(wildcard *.cpp)
+
+#objects
+OBJDIR=obj
+OBJ+=$(addprefix $(OBJDIR)/,$(CXXSRC:.cpp=.o))
+
+#output
+OUTDIR=..
+OUT=$(addprefix $(OUTDIR)/,libcommon.a)
+
+#targets
+all: $(OBJ) $(OUT)
+	ar -crs $(OUT) $(OBJ)
+
+$(OBJ): | $(OBJDIR)
+
+$(OUT): | $(OUTDIR)
+
+$(OBJDIR):
+	mkdir $(OBJDIR)
+
+$(OUTDIR):
+	mkdir $(OUTDIR)
+
+$(OBJDIR)/%.o: %.cpp
+	$(CXX) $(CXXFLAGS) -c -o $@ $<