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-rw-r--r--libdimension-png/png.c26
1 files changed, 16 insertions, 10 deletions
diff --git a/libdimension-png/png.c b/libdimension-png/png.c
index dbcd21a..49f1d6c 100644
--- a/libdimension-png/png.c
+++ b/libdimension-png/png.c
@@ -83,22 +83,28 @@ dmnsn_png_write_canvas(const dmnsn_canvas *canvas, FILE *file)
pixel = canvas->pixels + (height - y - 1)*width + x;
sRGB = dmnsn_sRGB_from_color(*pixel);
- if (sRGB.R < 1.0) {
- row[4*x] = sRGB.R*UINT16_MAX;
- } else {
+ if (sRGB.R <= 0.0) {
+ row[4*x] = 0;
+ } else if (sRGB.R >= 1.0) {
row[4*x] = UINT16_MAX;
+ } else {
+ row[4*x] = sRGB.R*UINT16_MAX;
}
- if (sRGB.G < 1.0) {
- row[4*x + 1] = sRGB.G*UINT16_MAX;
- } else {
+ if (sRGB.G <= 0.0) {
+ row[4*x + 1] = 0;
+ } else if (sRGB.G >= 1.0) {
row[4*x + 1] = UINT16_MAX;
- }
-
- if (sRGB.B < 1.0) {
- row[4*x + 2] = sRGB.B*UINT16_MAX;
} else {
+ row[4*x + 1] = sRGB.G*UINT16_MAX;
+ }
+
+ if (sRGB.B <= 0.0) {
+ row[4*x + 2] = 0;
+ } else if (sRGB.B >= 1.0) {
row[4*x + 2] = UINT16_MAX;
+ } else {
+ row[4*x + 2] = sRGB.B*UINT16_MAX;
}
row[4*x + 3] = (pixel->filter + pixel->trans)*UINT16_MAX;