New subject: how the get framerate of GEM in a pix_ object ?

15 Aug 2007


      Hey all,
I'm using pix_buffers to store images, and using various gemchains with
pix_buffer_read to represent those same images in different ways.
The problem I'm having is that it seems that putting a pix_mask below
pix_buffer_read will actually add that alpha channel to the pix_buffer.
The contents of the image actually change.
I expect pix_buffer_read to only read, and never alter the contents of
the buffer.
I tried a bunch of methods, but no matter what I do the only way to
clear the alpha added by pix_buffer_read is to reload an image into
pix_buffer using pix_buffer_write.
Perhaps a new object pix_stripalpha ?
Attached is a demo patch.
Any ideas for workaround would be appreciated.
.b.
#N canvas 474 380 716 404 10;
#X obj 20 23 gemhead;
#X obj 35 360 rectangle 5.333 4;
#X obj 23 49 translateXYZ 5.333 0 0;
#X obj 32 175 pix_buffer_write buffer;
#X obj 273 22 gemhead;
#X obj 288 335 pix_texture;
#X obj 288 359 rectangle 2.6666 2;
#X obj 255 66 translateXYZ 8 -2 0;
#X obj 87 132 hradio 15 1 0 4 empty empty empty 0 -6 0 8 -262144 -1
-1 0;
#X obj 344 108 hradio 15 1 0 4 empty empty empty 0 -6 0 8 -262144 -1
-1 1;
#X floatatom 168 129 5 0 0 0 - - -;
#X floatatom 301 107 5 0 0 0 - - -;
#X obj 282 234 pix_mask;
#X obj 334 209 pix_buffer_read video-mask;
#X obj 339 182 gemhead;
#X msg 505 180 0;
#X obj 287 310 alpha;
#X obj 566 24 gemhead;
#X obj 637 110 hradio 15 1 0 4 empty empty empty 0 -6 0 8 -262144 -1
-1 1;
#X floatatom 594 109 5 0 0 0 - - -;
#X obj 536 142 pix_buffer_read buffer;
#X obj 544 272 rectangle 2.6666 2;
#X obj 540 207 alpha;
#X obj 548 68 translateXYZ 8 2 0;
#X obj 249 30 tgl 15 0 empty empty empty 0 -6 0 8 -262144 -1 -1 1 1
;
#X obj 538 27 tgl 15 0 empty empty empty 0 -6 0 8 -262144 -1 -1 1 1
;
#X obj 35 263 pix_texture;
#X obj 32 91 pix_image test-image.jpg;
#X obj 86 24 tgl 15 0 empty empty empty 0 -6 0 8 -262144 -1 -1 1 1
;
#X obj 264 263 pix_texture;
#X obj 243 140 pix_buffer_read buffer;
#X obj 544 248 pix_texture;
#X obj 232 196 spigot 1;
#X obj 292 171 tgl 15 0 empty empty empty 0 -6 0 8 -262144 -1 -1 0
1;
#X connect 0 0 2 0;
#X connect 2 0 27 0;
#X connect 3 0 26 0;
#X connect 4 0 7 0;
#X connect 5 0 6 0;
#X connect 7 0 30 0;
#X connect 8 0 3 1;
#X connect 9 0 30 1;
#X connect 10 0 3 1;
#X connect 11 0 30 1;
#X connect 12 0 29 0;
#X connect 13 0 12 1;
#X connect 14 0 13 0;
#X connect 15 0 13 1;
#X connect 16 0 5 0;
#X connect 17 0 23 0;
#X connect 18 0 20 1;
#X connect 19 0 20 1;
#X connect 20 0 22 0;
#X connect 22 0 31 0;
#X connect 23 0 20 0;
#X connect 24 0 4 0;
#X connect 25 0 17 0;
#X connect 26 0 1 0;
#X connect 27 0 3 0;
#X connect 28 0 0 0;
#X connect 29 0 16 0;
#X connect 30 0 32 0;
#X connect 31 0 21 0;
#X connect 32 0 12 0;
#X connect 33 0 32 1;

pix_buffer_read alters pix_buffer contents?

< post("frame rate: %f", getFramerate() );