Robby Findler
ccbedb652f
make 2htdp/image images convertible to picts
2013-01-18 20:15:36 -06:00
Robby Findler
e0c4e4055d
make color and pen from 2htdp/image be structs in the sense
...
that 'color' and 'pen' have compile-time info saying that
they are structs
closes PR 13146
2012-09-28 15:09:29 -05:00
Matthew Flatt
19d474d045
fix some tests related to the make-color' and make-pen' addition
2012-05-03 19:22:58 -06:00
Robby Findler
1b0df5d48d
fix rotate so that it can accept non-integral arguments
...
closes PR 12632
2012-03-21 19:45:45 -05:00
Robby Findler
ed22a630fd
fix predicates to return booleans
2012-02-07 20:33:05 -06:00
Robby Findler
0dff5ca92b
special case the four cardinal directions during rotation so they rotate
...
exactly (this also makes flip-horizontal and flip-vertical work equally
well)
closes PR 12323
2011-10-26 16:36:07 -05:00
Robby Findler
0e2bd262a8
add a missing degrees to radians conversion in triangle/ass
...
closes PR 12199
2011-09-14 12:35:53 -05:00
Robby Findler
6c91288f2f
speed up bitmap rotation (could probably revisit this to
...
speed up flipping (and also to do all three in one pass)
2011-08-23 18:56:51 -05:00
Robby Findler
b425ca90d2
fix bug in the loading of non-alpha bitmaps (also: minor Rackety)
2011-08-23 18:56:50 -05:00
Robby Findler
034e4f2364
add test cases for old file 2htdp/image file formats
...
(and fix corresponding bugs)
2011-08-23 07:12:11 -05:00
Robby Findler
1f02106318
2htdp/image
...
normalize the internal representation of bitmaps so it always uses an alpha
bitmap instead of sometimes using a mask bitmap and sometimes using alpha.
This also fixes a bug where the library would get consfused when it saved
a bitmap to a file, since it didn't record if it was an alpha bitmap or not.
This improves the save files that contain images, cutting the size for bitmaps
in half (bringing the drracket save file down to a mere 25x larger than the
png file format for the example I was using...)
2011-08-22 19:09:52 -05:00
Robby Findler
d1e3765af7
added save-svg-image
2011-08-07 19:35:29 -05:00
Robby Findler
56b82ba83c
fix the png conversion code for 2htdp/image images
...
closes PR 12061
please merge to the release branch
2011-07-22 08:09:17 -05:00
Guillaume Marceau
adf965e92a
Undoes the 'produces -> return' part of commit c31d352f, keeping the 'changes -> mutates' change and the assorted bug fixes it contained.
2011-07-17 16:48:12 -04:00
Matthias Felleisen
6c51155fec
adjusted expected error messages to accommodate Stephen's change
2011-07-15 14:50:34 -04:00
Guillaume Marceau
c31d352f2b
Standartize the vocabulary to "the function returns" and "set! mutates"
2011-07-15 03:27:27 -04:00
Guillaume Marceau
9706920055
Updated the error messages of the world and universe teachpacks.
2011-07-06 05:35:27 -04:00
Eli Barzilay
3157955d40
".ss" -> ".rkt" scan done.
2011-07-02 10:37:53 -04:00
Robby Findler
9e36dc8eb3
adding a missing 2htdp/image color => racket/gui color coercion
...
closes PR 11956
2011-06-02 16:27:09 -07:00
Robby Findler
6fff26ad12
2htdp/image: relax the constraints on 'crop' so that you can crop outside the bounding box
2011-02-21 05:28:37 -06:00
Robby Findler
c1668d894e
added overlay/align, underlay/align, overlay/align/offset, and underlay/align/offset
2011-02-20 15:37:16 -06:00
Robby Findler
4d9c150b7b
2htdp/image: adjust tests
2011-02-11 19:50:15 -06:00
Robby Findler
eb45a6f15b
2htdp/image: place-image/align doesn't really need to check that the second image argument has a pinhole
2011-02-06 07:25:08 -06:00
David Van Horn
760a58b65d
Fixes more spelling errors.
2011-02-04 19:44:13 -07:00
Robby Findler
7716851cde
2htdp/image: added support for alpha as a mode? argument
2011-01-01 20:01:50 -06:00
Robby Findler
830c797ee4
use pen's alpha color stuff in 2htdp/image
2010-12-31 10:25:01 -06:00
Robby Findler
1d89cfc9d7
2htdp/image fix bitmap scaling to respect alpha channels
2010-12-28 19:08:11 -06:00
Robby Findler
835f7753dc
generalize the color structs to have an alpha field and then use that in the bitmap conversion functions
2010-12-27 21:51:14 -06:00
Robby Findler
7282e19178
tightened up the check on polygon to make sure the posns contain reals
...
closes PR 10997
2010-12-25 20:33:33 -06:00
Robby Findler
e896360dcf
take advantage of new equal<%> and snip% setup to make image-snip%s equal to 2htdp/image images (when appropriate)
2010-12-24 06:34:43 -06:00
Robby Findler
4917d2af4a
added freeze to 2htdp/image
2010-12-17 13:51:10 -06:00
Sam Tobin-Hochstadt
d92ce41a6f
Make 2htdp/image produce png-convertible results.
2010-12-17 12:32:25 -05:00
Robby Findler
db116cd14b
don't go up past the collection with relative requires
2010-12-12 16:24:18 -06:00
Robby Findler
2a7ccc552a
clean up test suite ala gr2
2010-11-29 13:49:47 -06:00
Robby Findler
6e7530ff86
added empty-image
2010-11-25 06:55:00 -06:00
Robby Findler
ae5cd21a1b
2htdp/image: changed the way drawing works, specifically avoid normalization before drawing to preserve sharing
2010-11-04 13:55:41 -05:00
Robby Findler
4941aec617
removed unused argument to normalize-image
2010-11-04 13:55:40 -05:00
Robby Findler
e80fb21c7c
unbreak test suite
2010-10-31 10:12:03 -05:00
Robby Findler
ebe486886c
change 2htdp/image to export image=?
2010-10-28 17:20:43 -05:00
Robby Findler
a744958fd5
added support to the 2htdp/image library for reading files when there is no GUI around.
...
currently the support is limited to images that can only report their sizes and pinholes and where equal?
signals an error unless the arguments are eq?.
2010-10-28 11:32:14 -05:00
Robby Findler
05d16d9311
closes PR 11293
2010-10-07 19:36:18 -05:00
Robby Findler
08b9396e2f
closes PR 11236
2010-09-21 16:47:55 -05:00
Robby Findler
6f0b6eebbe
Added pinholes as x-place and y-place arguments
2010-09-06 20:39:13 -05:00
Robby Findler
d10cd2e6fa
preserve pinholes in overlaying and related functions
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(also started to add "pinhole" as a place, but not done with that yet)
2010-09-06 20:39:12 -05:00
Robby Findler
cc96864868
added pinhole support to cropping primitives and to frame
2010-09-06 20:39:12 -05:00
Robby Findler
9b720b9c0d
added pinhole support to add-line, add-curve, scene+line, and scene+curve
2010-09-06 20:39:12 -05:00
Robby Findler
d2e443ac97
made equality check on images sensitive to pinholes
2010-09-06 20:39:11 -05:00
Robby Findler
9087348b7e
added pinhole support to the flipping prims
2010-09-06 20:39:11 -05:00
Robby Findler
157e9c2512
made rotation work with pinholes
2010-09-06 20:39:11 -05:00
Robby Findler
e3b51e8cf4
made scaling work with pinholes
2010-09-06 20:39:11 -05:00
