void ImageUtils::convertBumpToNormal(fipImage &toConvert, float strength)
{
if (toConvert.getBitsPerPixel() < 24)
toConvert.convertTo24Bits();
const int w = toConvert.getWidth();
const int h = toConvert.getHeight();
for (int y = 0; y < h; ++y)
{
for (int x = 0; x < w; ++x)
{
RGBQUAD topLeft, top, topRight, left, right, bottomLeft, bottom, bottomRight;
RGBQUAD current;
toConvert.getPixelColor(glm::clamp(x - 1, 0, w - 1), glm::clamp(y - 1, 0, h - 1), &topLeft);
toConvert.getPixelColor(x, glm::clamp(y - 1, 0, h - 1), &top);
toConvert.getPixelColor(glm::clamp(x + 1, 0, w - 1), glm::clamp(y - 1, 0, h - 1), &topRight);
toConvert.getPixelColor(glm::clamp(x - 1, 0, w - 1), y, &left);
toConvert.getPixelColor(glm::clamp(x + 1, 0, w - 1), y, &right);
toConvert.getPixelColor(glm::clamp(x - 1, 0, w - 1), glm::clamp(y + 1, 0, h - 1), &bottomLeft);
toConvert.getPixelColor(x, glm::clamp(y + 1, 0, h - 1), &bottom);
toConvert.getPixelColor(glm::clamp(x + 1, 0, w - 1), glm::clamp(y + 1, 0, h - 1), &bottomRight);
toConvert.getPixelColor(x, y, ¤t);
const float tl = intensity(topLeft);
const float t = intensity(top);
const float tr = intensity(topRight);
const float l = intensity(left);
const float r = intensity(right);
const float bl = intensity(bottomLeft);
const float b = intensity(bottom);
const float br = intensity(bottomRight);
glm::vec3 normal((tr + 2.0f * r + br) - (tl + 2.0f * l + bl),
(bl + 2.0f * b + br) - (tl + 2.0f * t + tr),
1.0f / strength);
normal = (glm::normalize(normal) + 1.0f) * 0.5f * 255.0f;
current.rgbRed = BYTE(normal.r);
current.rgbGreen = BYTE(normal.g);
current.rgbBlue = BYTE(normal.b);
toConvert.setPixelColor(x, y, ¤t);
}
}
}
void ImageUtils::switchRedBlue(fipImage &image)
{
for (unsigned int y = 0; y < image.getHeight(); ++y)
{
for (unsigned int x = 0; x < image.getWidth(); ++x)
{
RGBQUAD color;
image.getPixelColor(x, y, &color);
BYTE r = color.rgbRed;
color.rgbRed = color.rgbBlue;
color.rgbBlue = r;
image.setPixelColor(x, y, &color);
}
}
}
