atiran/porymap
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Fix rendering for fully transparent pixels

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This commit is contained in:
GriffinR 2024-12-19 11:44:44 -05:00
parent 64a9e2cacb
commit d768075a26
1 changed files with 10 additions and 13 deletions
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17
src/ui/imageproviders.cpp
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@ -43,6 +43,10 @@ QImage getMetatileImage(
metatile_image.fill(Qt::magenta);
return metatile_image;
}
// The GBA renders transparent pixels using palette 0 color 0. We have access to that color (palettes.value(0).value(0))
// but all 3 games actually overwrite this color with black when loading the tileset palettes, so we fill the metatile
// image with black so that any pixels we don't render will reveal the correct color.
metatile_image.fill(Qt::black);
QList<QList<QRgb>> palettes = Tileset::getBlockPalettes(primaryTileset, secondaryTileset, useTruePalettes);
@ -54,7 +58,6 @@ QImage getMetatileImage(
for (int y = 0; y < 2; y++)
for (int x = 0; x < 2; x++) {
int l = layerOrder.size() >= numLayers ? layerOrder[layer] : layer;
int bottomLayer = layerOrder.size() >= numLayers ? layerOrder[0] : 0;
// Get the tile to render next
Tile tile;
@ -91,12 +94,8 @@ QImage getMetatileImage(
QImage tile_image = getTileImage(tile.tileId, primaryTileset, secondaryTileset);
if (tile_image.isNull()) {
// Some metatiles specify tiles that are outside the valid range.
// These are treated as completely transparent, so they can be skipped without
// being drawn unless they're on the bottom layer, in which case we need
// a placeholder because garbage will be drawn otherwise.
if (l == bottomLayer) {
metatile_painter.fillRect(x * 8, y * 8, 8, 8, palettes.value(0).value(0));
}
// The way the GBA will render these depends on what's in memory (which Porymap can't know)
// so we treat them as if they were transparent.
continue;
}
@ -121,12 +120,10 @@ QImage getMetatileImage(
}
}
// The top layer of the metatile has its first color displayed at transparent.
if (l != bottomLayer) {
// Color 0 is displayed as transparent.
QColor color(tile_image.color(0));
color.setAlpha(0);
tile_image.setColor(0, color.rgba());
}
metatile_painter.drawImage(origin, tile_image.mirrored(tile.xflip, tile.yflip));
}