Hi, All - I've been getting closer and closer to a raw painting interface (see 'Inserting RMagick RVG images in wxRuby' for my starting point) and now what I'm working on (yes, I'm getting paid to work today; my kids are 3000 miles away so it's a welcome distraction) is drawing on a MemoryDC associated with a bitmap: @picture = Bitmap.new( size_x, size_y ) artist = MemoryDC.new artist.select_object @picture artist.set_background_mode SOLID artist.flood_fill( 160, 200, Colour.new( 240, 0, 0, 255 ) ) ... and later: paint_bitmap( @picture, client_size.x, client_size.y ) using the definition (part of my Window sub-class): def paint_bitmap bitmap, width, height bitmap = make_dummy if bitmap == nil # dummies for non-existant images (like cpu1 if single-thread) rescaled_bitmap = Bitmap.from_image( bitmap.convert_to_image.rescale( width, height ), -1 ) rescaled_bitmap.save_file( @fname, BITMAP_TYPE_XPM ) paint do | renderer | renderer.draw_bitmap( rescaled_bitmap, 0, 0, false ) end @sized = false end What appears to be happening is that my bitmaps are not taking over from the original contents of the memory arrays, because what I see being rendered appears to be garbage pages from the screen buffer. If I change something in my GUI (like pressing a button, which changes its color to yellow), I see smears of yellow showing up in my bitmaps and getting rendered in my GUI. The Bitmap#draw method referenced in the DC and MemoryDC docs appears to have gone bye-bye in 2.0, so I'm using the direct instantiation menthod. I finally got my copy of Smart and Hock and it says something about select_object not working if the bitmap is unpopulated, so my next try is to pull up a base bitmap from a file instead of creating one from new. Thanks in advance! :D
on 2010-11-26 01:02
on 2010-11-26 01:09
On Thu, Nov 25, 2010 at 2:57 PM, Don Wilde <firstname.lastname@example.org> wrote: [snip] > using the definition (part of my Window sub-class): > @sized = false > end [snip] Bitmap#load_file is also gone, but Bitmap.new has a file option. Never rely on a first-release API to be as documented. ;-) Changing make_dummy to load a file got rid of the uninitialized bitmaps, but I still can't paint anything on them. The above code should leave me with a screaming red bitmap, but all I get is the white from my blank.png.
on 2010-11-26 01:23
On Thu, Nov 25, 2010 at 3:19 PM, Don Wilde <email@example.com> wrote: [snip] > artist.flood_fill( 160, 200, Colour.new( 240, 0, 0, 255 ) ) >> >> Never mind. I just re-read the flood_fill docs and discovered that the Colour in the command is the BOUNDARY color, not the painting color. You can stop laughing now, hope you enjoyed. :D