| From 8faa5c2fb2b04b4fb062255aa807abafc50bff66 Mon Sep 17 00:00:00 2001 |
| From: Fabrice Fontaine <fontaine.fabrice@gmail.com> |
| Date: Sat, 3 Apr 2021 10:27:20 +0200 |
| Subject: [PATCH] ws2811.c: fix build with gcc 4.8 |
| |
| Fix the following build failure with gcc 4.8 (which has been added by |
| commit 391f6e856d28510bd9ae4efd3a166da7f73613ab): |
| |
| lib/ws2811.c: In function 'ws2811_set_custom_gamma_factor': |
| lib/ws2811.c:1289:5: error: 'for' loop initial declarations are only allowed in C99 mode |
| for (int chan = 0; chan < RPI_PWM_CHANNELS; chan++) |
| ^ |
| lib/ws2811.c:1289:5: note: use option -std=c99 or -std=gnu99 to compile your code |
| lib/ws2811.c:1295:11: error: 'for' loop initial declarations are only allowed in C99 mode |
| for(int counter = 0; counter < 256; counter++) |
| ^ |
| |
| Fixes: |
| - http://autobuild.buildroot.org/results/3d037922484bfc45d0f985f87b38f20c5a4ab064 |
| |
| Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com> |
| [Retrieved from: |
| https://github.com/jgarff/rpi_ws281x/commit/0814bae544f0184ab1600bc2660486874eef5970] |
| --- |
| ws2811.c | 5 +++-- |
| 1 file changed, 3 insertions(+), 2 deletions(-) |
| |
| diff --git a/ws2811.c b/ws2811.c |
| index f5cdebd..6482796 100644 |
| --- a/lib/ws2811.c |
| +++ b/lib/ws2811.c |
| @@ -1286,13 +1286,14 @@ const char * ws2811_get_return_t_str(const ws2811_return_t state) |
| |
| void ws2811_set_custom_gamma_factor(ws2811_t *ws2811, double gamma_factor) |
| { |
| - for (int chan = 0; chan < RPI_PWM_CHANNELS; chan++) |
| + int chan, counter; |
| + for (chan = 0; chan < RPI_PWM_CHANNELS; chan++) |
| { |
| ws2811_channel_t *channel = &ws2811->channel[chan]; |
| |
| if (channel->gamma) |
| { |
| - for(int counter = 0; counter < 256; counter++) |
| + for(counter = 0; counter < 256; counter++) |
| { |
| |
| channel->gamma[counter] = (gamma_factor > 0)? (int)(pow((float)counter / (float)255.00, gamma_factor) * 255.00 + 0.5) : counter; |
| -- |
| 2.30.2 |
| |