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authorTavian Barnes <tavianator@gmail.com>2011-05-28 18:05:05 -0600
committerTavian Barnes <tavianator@gmail.com>2011-05-28 18:05:05 -0600
commitefd3c1c2b42ffda0c8f7e5cd9b03fba07eead1ea (patch)
treec522f2bafe5def3eb68a79005c049e130ef76b24 /libdimension/png.c
parent1bf306d4d93cc21c220a3f31835023e49e84dd2d (diff)
downloaddimension-efd3c1c2b42ffda0c8f7e5cd9b03fba07eead1ea.tar.xz
Handle sRGB gamma correctly.
Diffstat (limited to 'libdimension/png.c')
-rw-r--r--libdimension/png.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/libdimension/png.c b/libdimension/png.c
index 5b7f625..6a56a87 100644
--- a/libdimension/png.c
+++ b/libdimension/png.c
@@ -64,7 +64,9 @@ dmnsn_png_optimizer_fn(const dmnsn_canvas *canvas,
dmnsn_color color;
uint16_t *pixel = (uint16_t *)optimizer.ptr + 4*(y*canvas->width + x);
- color = dmnsn_remove_filter(dmnsn_get_pixel(canvas, x, y));
+ color = dmnsn_get_pixel(canvas, x, y);
+ color = dmnsn_remove_filter(color);
+ color = dmnsn_color_to_sRGB(color);
/* Saturate R, G, and B to [0, UINT16_MAX] */
@@ -272,6 +274,7 @@ dmnsn_png_write_canvas_thread(void *ptr)
/* Invert the rows. PNG coordinates are fourth quadrant. */
dmnsn_color color = dmnsn_get_pixel(payload->canvas, x, height - y - 1);
color = dmnsn_remove_filter(color);
+ color = dmnsn_color_to_sRGB(color);
/* Saturate R, G, and B to [0, UINT16_MAX] */
@@ -477,6 +480,7 @@ dmnsn_png_read_canvas_thread(void *ptr)
}
}
+ color = dmnsn_color_from_sRGB(color);
dmnsn_set_pixel(*payload->canvas, x, height - y - 1, color);
}