suspect-devices/circuitpython/shared-module/displayio/OnDiskBitmap.c, branch 6.1.x CircuitPython - a Python implementation for teaching coding with microcontrollers https://git.suspectdevices.com/suspect-devices/circuitpython/atom?h=6.1.x 2020-12-17T16:54:37+00:00 OnDiskBitmap: Correct handling of "0 color palette" images 2020-12-17T16:54:37+00:00 Jeff Epler jepler@gmail.com 2020-12-17T16:54:37+00:00 urn:sha1:f224ed18488b1e92b6d13b09b696769a2ac380ce Microsoft documentation says: > If biCompression equals BI_RGB and the bitmap uses 8 bpp or less, the bitmap has a color table immediatelly following the BITMAPINFOHEADER structure. The color table consists of an array of RGBQUAD values. The size of the array is given by the biClrUsed member. If biClrUsed is zero, the array contains the maximum number of colors for the given bitdepth; that is, 2^biBitCount colors. Formerly, we treated 0 colors as "no image palette" during construction, but then during common_hal_displayio_ondiskbitmap_get_pixel indexed into the palette anyway. This could have unpredictable results. On a pygamer, it gave an image that was blue and black. On magtag, it gave a crash. More cleanup 2019-08-22T23:16:09+00:00 Scott Shawcroft scott@tannewt.org 2019-08-22T23:16:09+00:00 urn:sha1:72e7ffa324f8184cb2d9a5ca9fa620a2a5a56b69 EPaper displays work mostly. 2019-08-22T21:08:33+00:00 Scott Shawcroft scott@tannewt.org 2019-08-02T23:17:38+00:00 urn:sha1:70680d5b22aa6cb797ccf26645d553a4c72b5100 Fix off by one error in OnDiskBitmap 2019-04-17T22:17:11+00:00 Scott Shawcroft scott@tannewt.org 2019-04-17T22:17:11+00:00 urn:sha1:c372567330fe8019ee306e8a45638f2703a09ca0 It resulted in the first row of pixels being pulled for out of bounds. Fixes #1801 fixed typo 2019-03-01T15:32:46+00:00 Bryan Siepert bsiepert@gmail.com 2019-03-01T15:32:46+00:00 urn:sha1:76dc8e1ac861b11d01c2e82ecfdbaea761c84fd0 fixed whitespace, clarified variable name, and updated error messages 2019-03-01T15:17:50+00:00 Bryan Siepert bsiepert@gmail.com 2019-03-01T15:16:14+00:00 urn:sha1:014595bff593e51012483515adf92e21c7126f5d added monochrome, 8bpp indexed, and 32bpp ARGB BMPs 2019-03-01T07:08:12+00:00 Bryan Siepert bsiepert@gmail.com 2019-02-28T05:02:48+00:00 urn:sha1:398c7060f8a51bb83b0f5e0c2a1611d684603d2b (fork rebuild) Initial support for 16bpp 555&565 and 8bpp grayscale bitmaps 2019-02-23T18:58:46+00:00 Bryan Siepert bsiepert@gmail.com 2019-02-23T18:58:46+00:00 urn:sha1:b81072e7501045bfa5e8e5b74631dfe01327af2b adding height and width to OnDiskBitmap for #1460 2019-01-21T06:33:22+00:00 Bryan Siepert bsiepert@gmail.com 2019-01-21T06:33:22+00:00 urn:sha1:ab2ad7ba4542c2e133ced64ccb8e9d0b4065e86f Add OnDiskBitmap which loads pixel data straight from disk. 2018-09-12T22:25:59+00:00 Scott Shawcroft scott@tannewt.org 2018-09-11T05:00:21+00:00 urn:sha1:f21cf15c384756ae462fdffded79c4bda8afcc28 Also, renamed Sprite's palette to pixel_shader so it can be anything that produces colors based on values (including color values). Added a ColorConverter that converts RGB888 (found in bitmaps) to RGB565 for the display. Fixes #1182