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Leonetienne 2022-03-06 19:22:46 +01:00
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@ -115,15 +115,17 @@ bmp.FillChannel(3, 255);
```c++ ```c++
// Convert BGR to RGB, by swapping the red and blue channels. // Convert BGR to RGB, by swapping the red and blue channels.
bmp.SwapChannels(0, 2); bmp.SwapChannels(0, 2);
// Obviously: red->0, green->1, blue->2, alpha->3
``` ```
##### Feed in existing pixel buffer ##### Feed in an existing pixel buffer
```c++ ```c++
// OK, this is a bit more complex, but here's how to do it // OK, this is a bit more complex, but here's how to do it
// This is assumed to be an RGBA pixel buffer, formatted like: // This is assumed to be an RGBA pixel buffer, formatted like:
// RGBARGBARGBARGBARGBARGBARGBA, with pixels in the same row lying next to each other in memory. // RGBARGBARGBARGBARGBARGBARGBA, with pixels in the same row lying next to each other in memory.
std::vector<std::uint8_t> yourPixelbuffer; const std::vector<std::uint8_t> yourPixelbuffer;
// Create a BMP instance with your resolution, and color mode // Create a BMP instance with your resolution, and color mode
BMP bmp(Vector2i(img_height, img_width), Colormode::RGBA); BMP bmp(Vector2i(img_height, img_width), Colormode::RGBA);