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Age	Commit message (Collapse)	Author
2023-02-06	libmemdraw: don't return Buffer copy from calc functions	cinap_lenrek
	The calc functions get their buffers passed by value. This is convenient as the code usually modifies the buffers during iteration. However, making ANOTHER copy (odst) and returning it at the end is a bit silly. We already made a copy when passing the arguments, and the caller of the calc function can just reuse the copy it already has. So changing the return type from Buffer to void.
2023-01-06	libmemdraw: coding style (from drawterm)	cinap_lenrek

2017-04-29	libmemdraw/libmemlayer: get rid of drawdebug prints	cinap_lenrek

2016-11-17	libmemdraw: remove unused static drawbuf variables and ptrfn() declaration	cinap_lenrek

2016-05-29	libmemdraw: remove unused static variable from memimagedraw()	cinap_lenrek

2014-12-30	libmemdraw: never point Buffer.alpha to nil (thanks mischief)	cinap_lenrek
	the boolcopy optimization doesnt doesnt use Buffer.alpha, tho the debug function dumpbuf() still can dereference it. to keep it simple, always have Buffer.alpha point to the channel or &ones when not used.
2014-09-19	libmemdraw: fix byte ordering in memfillcolor()	cinap_lenrek
	memfillcolor() used to write longs in host byte order which is wrong. have to always use little endian. to simplify, moved little endian conversion into memsetl() and memsets() avoiding code duplication.
2014-04-12	libmemdraw: improve readbyte() and writebyte() routines	cinap_lenrek
	remove unused memsetb() routine. replace foo ? 1 : 0 with foo != 0 avoid double calculation of rgb components in readbyte() handle byte aligned color components in writebyte() which lets us avoid the read-modify-write and the shifting. surprisingly, the branches in the loop are way less important than avoiding the memory access. this change makes ganes/snes playable at -3 scaling.
2013-12-09	draw: fix drawing of replicated source image on memlayer with a clip rectangle	cinap_lenrek
	when a replicated source image with a clipr with clipr.min > Pt(0, 0), drawclip() would properly translate the src->clipr on the dstr but then clamp the source rectangle back on src->r. while traversing down multiple layers, this would cause the translation to be applied multiple times to the dst rectangle giving the wrong image result. this change adds a new drawclipnorepl() function that avoids the clamping of source and mask rectangles to src->r and mask->r. this is then used in libmemlayer. the final memimagedraw() call will call drawclip() which will do the final claming. a testcase is provided: #include <u.h> #include <libc.h> #include <draw.h> Image blue; Image red; void main(int, char argv[]) { Image i; if(initdraw(nil, nil, argv[0]) < 0) sysfatal("initdraw: %r"); i = allocimage(display, screen->r, screen->chan, 1, DWhite); red = allocimage(display, Rect(0,0,1,1), screen->chan, 1, DRed); blue = allocimage(display, Rect(0,0,1,1), screen->chan, 1, DPaleblue); replclipr(red, 1, Rect(10, 10, 110, 110)); replclipr(blue, 1, Rect(11, 11, 111, 111)); /* draw on non-layer, works correctly / draw(i, i->r, red, nil, ZP); draw(i, i->r, blue, nil, ZP); draw(screen, screen->r, i, nil, i->r.min); flushimage(display, 1); / draw on (screen) layer is too far to the right */ draw(screen, screen->r, red, nil, ZP); draw(screen, screen->r, blue, nil, ZP); flushimage(display, 1); for(;;){ sleep(1000); } }
2013-11-12	libmemdraw: change memimageinit() to return integer error (for kernel), ↵	cinap_lenrek
	minor cleanups
2013-06-16	draw: add badrect() function to reject zero, negative size or orverly huge ↵	cinap_lenrek
	rectangles not checking the rectangle dimensions causes integer overflows and memory corruption. adding a new badrect() function that checks for these cases.
2013-06-16	libmemdraw: fix drawing to color mapped with alpha chan (m8a8)	cinap_lenrek

2011-04-11	vesa-changes	cinap_lenrek

2011-03-30	Import sources from 2011-03-30 iso image - lib	Taru Karttunen

2011-03-30	Import sources from 2011-03-30 iso image	Taru Karttunen