Pixmap::WritePixel

This method sets a single pixel in the pixmap to the specified color.

Syntax

• void WritePixel(const int x, const int y, const int color)
• void WritePixel(const int x, const int y, const Vec4& color)

Remarks

This command is thread-safe, as long as multiple threads do not write to the same region. See the ThreadPool class for an example of multi-threaded use.

This method will not work with compressed pixel formats.

Example

#include "UltraEngine.h"

using namespace UltraEngine;

int main(int argc, const char* argv[])
{
    //Get the displays
    auto displays = GetDisplays();

    //Create window
    auto window = CreateWindow("Ultra Engine", 0, 0, 800, 600, displays[0]);

    //Create user interface
    auto ui = CreateInterface(window);

    //Create a pixmap
    auto pixmap = CreatePixmap(512, 512);

    //Write pixel data
    for (int x = 0; x < 512; ++x)
    {
        for (int y = 0; y < 512; ++y)
        {
            pixmap->WritePixel(x, y, Rgba(255 * float(x) / 512.0f, 255 * float(y) / 512.0f, 0, 255));
        }
    }

    //Show the pixmap
    ui->root->SetPixmap(pixmap);

    while (true)
    {
        const Event ev = WaitEvent();
        switch (ev.id)
        {
        case EVENT_WINDOWCLOSE:
            return 0;
            break;
        }
    }

    return 0;
}