diff options
Diffstat (limited to 'source/blender/draw/engines/gpencil/shaders/gpencil_common_lib.glsl')
| -rw-r--r-- | source/blender/draw/engines/gpencil/shaders/gpencil_common_lib.glsl | 22 |
1 files changed, 11 insertions, 11 deletions
diff --git a/source/blender/draw/engines/gpencil/shaders/gpencil_common_lib.glsl b/source/blender/draw/engines/gpencil/shaders/gpencil_common_lib.glsl index 6671c16aa0b..7ddfdc5f65c 100644 --- a/source/blender/draw/engines/gpencil/shaders/gpencil_common_lib.glsl +++ b/source/blender/draw/engines/gpencil/shaders/gpencil_common_lib.glsl @@ -101,33 +101,33 @@ void blend_mode_output( { switch (blend_mode) { case MODE_REGULAR: - /* Reminder: Blending func is premult alpha blend (dst.rgba * (1 - src.a) + src.rgb). */ + /* Reminder: Blending func is premult alpha blend `(dst.rgba * (1 - src.a) + src.rgb)`. */ color *= opacity; frag_color = color; frag_revealage = vec4(0.0, 0.0, 0.0, color.a); break; case MODE_MULTIPLY: - /* Reminder: Blending func is multiply blend (dst.rgba * src.rgba). */ + /* Reminder: Blending func is multiply blend `(dst.rgba * src.rgba)`. */ color.a *= opacity; frag_revealage = frag_color = (1.0 - color.a) + color.a * color; break; case MODE_DIVIDE: - /* Reminder: Blending func is multiply blend (dst.rgba * src.rgba). */ + /* Reminder: Blending func is multiply blend `(dst.rgba * src.rgba)`. */ color.a *= opacity; frag_revealage = frag_color = clamp(1.0 / max(vec4(1e-6), 1.0 - color * color.a), 0.0, 1e18); break; case MODE_HARDLIGHT: { - /* Reminder: Blending func is multiply blend (dst.rgba * src.rgba). */ + /* Reminder: Blending func is multiply blend `(dst.rgba * src.rgba)`. */ /** * We need to separate the overlay equation into 2 term (one mul and one add). * This is the standard overlay equation (per channel): - * rtn = (src < 0.5) ? (2.0 * src * dst) : (1.0 - 2.0 * (1.0 - src) * (1.0 - dst)); + * `rtn = (src < 0.5) ? (2.0 * src * dst) : (1.0 - 2.0 * (1.0 - src) * (1.0 - dst));` * We rewrite the second branch like this: - * rtn = 1 - 2 * (1 - src) * (1 - dst); - * rtn = 1 - 2 (1 - dst + src * dst - src); - * rtn = 1 - 2 (1 - dst * (1 - src) - src); - * rtn = 1 - 2 + dst * (2 - 2 * src) + 2 * src; - * rtn = (- 1 + 2 * src) + dst * (2 - 2 * src); + * `rtn = 1 - 2 * (1 - src) * (1 - dst);` + * `rtn = 1 - 2 (1 - dst + src * dst - src);` + * `rtn = 1 - 2 (1 - dst * (1 - src) - src);` + * `rtn = 1 - 2 + dst * (2 - 2 * src) + 2 * src;` + * `rtn = (- 1 + 2 * src) + dst * (2 - 2 * src);` */ color = mix(vec4(0.5), color, color.a * opacity); vec4 s = step(-0.5, -color); @@ -143,7 +143,7 @@ void blend_mode_output( break; case MODE_SUB: case MODE_ADD: - /* Reminder: Blending func is additive / subtractive blend (dst.rgba +/- src.rgba). */ + /* Reminder: Blending func is additive / subtractive blend `(dst.rgba +/- src.rgba)`. */ frag_color = color * color.a * opacity; frag_revealage = vec4(0.0); break; |