Okay, I have implemented the raw pixel access and want to use Alpha to show pixels or not.
It seems that the Alpha setting is not working as intended for me. It does not matter what Alpha value I use, the pixel never gets hidden.
Code: Select all
wxBitmap bmp(width, height, 32);
wxAlphaPixelData data(bmp, wxRect(wxSize(width, height)));
wxAlphaPixelData::Iterator p(data);
unsigned int index = 0;
p.Offset(data, 0, 0);
for (int y = 0; y < height; ++y)
{
wxAlphaPixelData::Iterator rowStart = p;
for (int x = 0; x < width; ++x, ++p)
{
auto& entry = pal->colors[paletteIndices[index]];
p.Red() = entry.red;
p.Green() = entry.green;
p.Blue() = entry.blue;
if (paletteIndices[index] == 0)
p.Alpha() = 0;
else
p.Alpha() = 255;
index++;
}
p = rowStart;
p.OffsetY(data, 1);
}
This is what the tile looks like without any hiding of pixels:
All blue pixels (paletteIndices[index] == 0 has these RGB values) should not be visible on screen.
That's how the tiles connect.
I have also tested using what is in the sample (samples/image):
Code: Select all
auto& entry = pal->colors[paletteIndices[index]];
unsigned char alpha = paletteIndices[index] == 0 ? wxALPHA_TRANSPARENT : wxALPHA_OPAQUE;
p.Red() = entry.red * alpha / 256;
p.Green() = entry.green * alpha / 256;
p.Blue() = entry.blue * alpha / 256;
p.Alpha() = alpha;
This also does not work as what should be gone, is rendered black.
I'll check how everything performs, I can always switch to event based rendering instead of timers.
