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Cover mode setting "extend", extension in x.

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This commit is contained in:
Jonas Diemer
2026-01-13 10:51:56 +01:00
parent 3ae73098d8
commit 757753df72
4 changed files with 41 additions and 6 deletions
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36
lib/GfxRenderer/GfxRenderer.cpp
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@@ -234,8 +234,11 @@ void GfxRenderer::drawBitmap(const Bitmap& bitmap, const int x, const int y, con
// draw extended pixels
/// amount of pixels taken from bitmap and repeated to extend
int extendY = 20;
int extendX = 20; // The width of the strip to be mirrored
int drawExtY = 0;
if (extend) {
int imgHeight = std::floor(scale * (bitmap.getHeight() - cropPixY));
int imgWidth = std::floor(scale * (bitmap.getWidth() - cropPixX));
// 1. TOP EXTENSION
// Check if the current pixel is within the strip to be mirrored
if (screenY >= y && screenY < y + extendY) {
@@ -256,7 +259,6 @@ void GfxRenderer::drawBitmap(const Bitmap& bitmap, const int x, const int y, con
}
// 2. BOTTOM EXTENSION
int imgHeight = std::floor(scale * (bitmap.getHeight() - cropPixY));
int imgBottom = y + imgHeight;
int gapBottom = getScreenHeight() - imgBottom;
@@ -273,6 +275,38 @@ void GfxRenderer::drawBitmap(const Bitmap& bitmap, const int x, const int y, con
if (t2 >= imgBottom && t2 < getScreenHeight()) drawVal(screenX, t2, val);
}
}
// --- 2. LEFT EXTENSION ---
int imgRight = x + imgWidth; // x is the left margin/offset
// If the current pixel is within the leftmost 'extendX' pixels of the image
if (screenX >= x && screenX < x + extendX) {
int numIterations = (x / extendX) + 1;
for (int nx = 0; nx < numIterations; nx++) {
// Mirror Fold (pixel at 'x' maps to 'x-1')
int t1 = x - 1 - (2 * nx * extendX + (screenX - x));
// Reverse Fold
int t2 = x - 1 - (2 * nx * extendX + (2 * extendX - 1 - (screenX - x)));
if (t1 >= 0 && t1 < x) drawVal(t1, screenY, val);
if (t2 >= 0 && t2 < x) drawVal(t2, screenY, val);
}
}
// --- 3. RIGHT EXTENSION ---
int gapRight = getScreenWidth() - imgRight;
// If the current pixel is within the rightmost 'extendX' pixels of the image
if (screenX >= imgRight - extendX && screenX < imgRight) {
int numIterations = (gapRight / extendX) + 1;
for (int nx = 0; nx < numIterations; nx++) {
// Mirror Fold (pixel at 'imgRight-1' maps to 'imgRight')
int t1 = imgRight + (2 * nx * extendX + (imgRight - 1 - screenX));
// Reverse Fold
int t2 = imgRight + (2 * nx * extendX + (2 * extendX - 1 - (imgRight - 1 - screenX)));
if (t1 >= imgRight && t1 < getScreenWidth()) drawVal(t1, screenY, val);
if (t2 >= imgRight && t2 < getScreenWidth()) drawVal(t2, screenY, val);
}
}
}
}
}