Topics

1

Graphics / Faster drawing for multiple shapes

« on: August 23, 2016, 03:17:04 am »

I have to draw alot of times the same set of shapes, and i would like to know if there is a way to group those together so that i would only need to perform grouping once and that i could draw that on a RenderWindow faster.

2

General / Problem with running a big-array-of-pixels app

« on: July 20, 2016, 06:34:38 pm »

So, this is obviously not my real app, but i managed to isolate it to this piece of code.

#include <SFML/Graphics.hpp>
#include <SFML/Window.hpp>
#include <SFML/System.hpp>
#include <cstdio>

int main()
{
    long int W;
    scanf("%d", &W);
    const long int H = W;

    sf::Texture texture;
    sf::Sprite sprite;

    if(!texture.create(W, H)) throw "ERR";

    sf::Uint8 pixels[W*H*4];
    texture.update(pixels);
    sprite.setTexture(texture);

    return 0;
}

In the actual program, I'm manipulating an array of pixels pixel-by-pixel.
I've tested for W=716 and lower values, and it presented the standard "Status 0" stuff at the end.
But for W=717 and larger values, a box pops up, where you can read:

"ProblemProject.exe stopped working
Windows is searching for a solution to the problem..."

and then another one saying:

"ProblemProject.exe stopped working
Windows is collecting information about the problem. This process might take several minutes..."

and finally one saying:

"ProblemProject.exe stopped working
A problem led to the program to stop working correctly. Windows will close the program and warn you if there is a possible solution."

I click a "Close program" button, and the Console presents the message:

"Process returned 255 (0xFF)   execution time : 9.685 s
Press any key to continue."

I've tested the code for a full-window (red-coloured xd) rectangle shape and it worked fine for every value of W.

I'm using static (and static debug as well) versions of all the SFML 2.3.2 libraries (both with -s and -s-d i get the same thing), and using
CodeBlocks Release 13.12 rev 9501 (2013/12/25 19:25:45) gcc 4.7.1 Windows/unicode - 32 bit

I'm working on Windows10, and my GPU is NVIDIA GEFORCE GTX 950M.

Please help me, I'm almost certain it must be a begginer's issue, but I still couldn't find any related post.