diff options
Diffstat (limited to 'libdimension/gl.c')
| -rw-r--r-- | libdimension/gl.c | 20 |
1 files changed, 16 insertions, 4 deletions
diff --git a/libdimension/gl.c b/libdimension/gl.c index 77eefcd..857c7de 100644 --- a/libdimension/gl.c +++ b/libdimension/gl.c @@ -112,8 +112,14 @@ dmnsn_gl_write_canvas(const dmnsn_canvas *canvas) pixel[2] = sRGB.B*UINT16_MAX; } - /* color.filter + color.trans is in [0.0, 1.0] by definition */ - pixel[3] = (color.filter + color.trans)*UINT16_MAX; + double alpha = dmnsn_color_intensity(color)*color.filter + color.trans; + if (alpha <= 0.0) { + pixel[3] = 0; + } else if (alpha >= 1.0) { + pixel[3] = UINT16_MAX; + } else { + pixel[3] = alpha*UINT16_MAX; + } } } @@ -201,6 +207,12 @@ dmnsn_gl_optimizer_fn(const dmnsn_canvas *canvas, pixel[2] = sRGB.B*UINT16_MAX; } - /* color.filter + color.trans is in [0.0, 1.0] by definition */ - pixel[3] = (color.filter + color.trans)*UINT16_MAX; + double alpha = dmnsn_color_intensity(color)*color.filter + color.trans; + if (alpha <= 0.0) { + pixel[3] = 0; + } else if (alpha >= 1.0) { + pixel[3] = UINT16_MAX; + } else { + pixel[3] = alpha*UINT16_MAX; + } } |