There is a quite obscure paint tool, SpookyPaint, that one can experiment with and use the combination rules.
http://www.languagegame.org:8080/zoo/241
Cheers, Karl
On Thu, Mar 21, 2019 at 9:14 PM Eliot Miranda eliot.miranda@gmail.com wrote:
On Thu, Mar 21, 2019 at 9:22 AM Levente Uzonyi leves@caesar.elte.hu wrote:
I haven't tried the code yet, but based on the commit message, this is a great contribution. Perhaps it would be worth to create a complete tool showing the actual results. I think this code belongs to Morphic/MorphicExtras rather than Graphics. Graphics doesn't depend on Morphic, and it shouldn't, but these changes would introduce that dependency.
+1
Levente
On Thu, 21 Mar 2019, David T. Lewis wrote:
Hi Maximilian,
This looks like a good addition. It is small and useful, and it aids understanding.
I am not very knowledgeable about the BitBlt rules, so maybe someone else can look at it also? To me, this looks like a good contribution for trunk.
Dave
On Wed, Mar 20, 2019 at 12:51:46PM +0000, commits@source.squeak.org
wrote:
A new version of Graphics was added to project The Inbox: http://source.squeak.org/inbox/Graphics-ms.407.mcz
==================== Summary ====================
Name: Graphics-ms.407 Author: ms Time: 20 March 2019, 1:51:42.768596 pm UUID: 40a66bd7-815f-43f7-bbd0-31dc8da3a483 Ancestors: Graphics-mt.406
Adds a preview morph for results of all BitBlt rules.
When first using BitBlt, it wasn't easy to understand the effects of
the possible rules on pixel combinating for me.
I implemented two example methods which preview the effects of rule 0
to 41 (these are all, I believe) on quadratic existing forms with colors and 1 bit alpha channel (previewAllBitBltRules uses ToolIcons flag/collection) plus Forms with more alpha values (previewAllBitBltRulesWithAlpha uses ToolIcons flag and a Color red + 0.4 alpha preview). They generate a combined morph for all rules applied on these forms (scaled, because icons are small) and opens it in your hand.
Internally, this morph can be generated for any rule, forms and scale.
Rules which throw exceptions are replaced with a fallback form.
=============== Diff against Graphics-mt.406 ===============
Item was added:
- ----- Method: BitBlt class>>previewAllBitBltRules (in category
'examples') -----
- previewAllBitBltRules
- (self previewBitBltRules: (0 to: 41)
on: ToolIcons flagand: ToolIcons collectionfallback: ToolIcons exceptionscaledTo: 32) openInHand.!Item was added:
- ----- Method: BitBlt class>>previewAllBitBltRulesWithAlpha (in
category 'examples') -----
- previewAllBitBltRulesWithAlpha
- (self previewBitBltRules: (0 to: 41)
on: ToolIcons flagand: ((Color red alpha: 0.4) iconOrThumbnailOfSize: 12)fallback: ToolIcons exceptionscaledTo: 32) openInHand.!Item was added:
- ----- Method: BitBlt
class>>previewBitBltRules:on:and:fallback:scaledTo: (in category 'examples') -----
- previewBitBltRules: rules on: aForm1 and: aForm2 fallback:
fallbackForm scaledTo: aNumberOrPoint
- "Returns a combined morph of the result of each rule applied on
aForm1 combined with
- aForm2 scaled to aNumberOrPoint. If the combination faild with a
rule, fallbackForm is
- shown instead. The number of each rule is appended at the bottom
of each result."
- | resultMorph tileExtent |
- tileExtent := aNumberOrPoint asPoint.
- resultMorph := Morph new
color: Color transparent;extent: (rules size * tileExtent x)@tileExtent y;yourself.- rules withIndexDo: [ :rule :index | | form formMorph numberLabel |
form := aForm1 copy.[aForm2 copy displayOn: form at: 0@0 rule: rule]on: Exceptiondo: [form := fallbackForm].formMorph := (form scaledToSize: tileExtent) asMorphposition: (index*tileExtent x)@0;yourself.resultMorph addMorph: formMorph.numberLabel := rule asString asMorphcenter: ((index+0.5)*tileExtent x)@tileExtent y;yourself.resultMorph addMorph: numberLabel].- ^ resultMorph!
-- _,,,^..^,,,_ best, Eliot