riCOM_cpp/src/SdlImageWindow.cpp at master · ThFriedrich/riCOM_cpp · GitHub

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* You may use, distribute and modify

* this code under the terms of the GPL3 license.

* You should have received a copy of the GPL3 license with

* this file. If not, please visit:

* https://www.gnu.org/licenses/gpl-3.0.en.html

* Authors:

* Thomas Friedrich <thomas.friedrich@uantwerpen.be>

* Chu-Ping Yu <chu-ping.yu@uantwerpen.be>

#include "SdlImageWindow.h"

SdlImageWindow::SdlImageWindow(const char *title, SDL_Surface *srf, int nx, int ny, float scale)

{

this->title = title;

create_window(srf, nx, ny, scale);

};

SdlImageWindow::SdlImageWindow(const char *title)

{

this->title = title;

this->window = NULL; // Pointer for the window

this->renderer = NULL; // Pointer for the renderer

this->tex = NULL; // Texture for the window

this->srf = NULL; // Surface (data source)

};

void SdlImageWindow::create_window(SDL_Surface *srf, int nx, int ny, float scale)

{

// Creating window

window = SDL_CreateWindow(title, SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, scale * nx, scale * ny, SDL_WINDOW_SHOWN | SDL_WINDOW_RESIZABLE | SDL_WINDOW_OPENGL);

if (window == NULL)

{

std::cout << "Window could not be created! SDL Error: " << SDL_GetError() << std::endl;

}

// Creating Renderer

renderer = SDL_CreateRenderer(window, -1, SDL_RENDERER_ACCELERATED | SDL_RENDERER_PRESENTVSYNC);

if (renderer == NULL)

{

std::cout << "Renderer could not be created! SDL Error: " << SDL_GetError() << std::endl;

}

// Creating texture for hardware rendering

tex = SDL_CreateTexture(renderer, SDL_GetWindowPixelFormat(window), SDL_TEXTUREACCESS_STATIC, nx, ny);

if (tex == NULL)

{

std::cout << "Texture could not be created! SDL Error: " << SDL_GetError() << std::endl;

}

// Maintain Pixel aspect ratio on resizing

if (SDL_RenderSetLogicalSize(renderer, scale * nx, scale * ny) < 0)

{

std::cout << "Logical size could not be set! SDL Error: " << SDL_GetError() << std::endl;

}

this->srf = srf;

}

void SdlImageWindow::update_image()

{

if (srf != NULL)

{

if (SDL_UpdateTexture(tex, NULL, srf->pixels, srf->pitch) == -1)

{

std::cout << "SDL_UpdateTexture failed: " << SDL_GetError() << std::endl;

}

if (SDL_RenderCopy(renderer, tex, NULL, NULL) == -1)

{

std::cout << "SDL_RenderCopy failed: " << SDL_GetError() << std::endl;

}

SDL_RenderPresent(renderer);

}

riCOM_cpp/src/SdlImageWindow.cpp at master · ThFriedrich/riCOM_cpp · GitHub

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