[Bf-blender-cvs] [02012b0cce5] master: GHOST/Wayland: account for fractional scale when picking the output
Campbell Barton
noreply at git.blender.org
Thu Jun 16 04:30:25 CEST 2022
Commit: 02012b0cce52c707321dc1b2942fa83d65128592
Author: Campbell Barton
Date: Thu Jun 16 12:29:18 2022 +1000
Branches: master
https://developer.blender.org/rB02012b0cce52c707321dc1b2942fa83d65128592
GHOST/Wayland: account for fractional scale when picking the output
Finding the output with the largest scale now checks fractional scaling.
While this is only a minor difference in most cases, it makes the scale
deterministic instead of depending on the order outputs are added.
===================================================================
M intern/ghost/intern/GHOST_WindowWayland.cpp
===================================================================
diff --git a/intern/ghost/intern/GHOST_WindowWayland.cpp b/intern/ghost/intern/GHOST_WindowWayland.cpp
index fdd372a9bd4..dc5719e3b94 100644
--- a/intern/ghost/intern/GHOST_WindowWayland.cpp
+++ b/intern/ghost/intern/GHOST_WindowWayland.cpp
@@ -58,28 +58,54 @@ struct window_t {
/** \name Internal Utilities
* \{ */
+/**
+ * Return -1 if `output_a` has a scale smaller than `output_b`, 0 when there equal, otherwise 1.
+ */
+static int output_scale_cmp(const output_t *output_a, const output_t *output_b)
+{
+ if (output_a->scale < output_b->scale) {
+ return -1;
+ }
+ if (output_a->scale > output_b->scale) {
+ return 1;
+ }
+ if (output_a->has_scale_fractional || output_b->has_scale_fractional) {
+ const wl_fixed_t scale_fractional_a = output_a->has_scale_fractional ?
+ output_a->scale_fractional :
+ wl_fixed_from_int(output_a->scale);
+ const wl_fixed_t scale_fractional_b = output_b->has_scale_fractional ?
+ output_b->scale_fractional :
+ wl_fixed_from_int(output_b->scale);
+ if (scale_fractional_a < scale_fractional_b) {
+ return -1;
+ }
+ if (scale_fractional_a > scale_fractional_b) {
+ return 1;
+ }
+ }
+ return 0;
+}
+
static int outputs_max_scale_or_default(const std::vector<output_t *> &outputs,
const int32_t scale_default,
uint32_t *r_dpi)
{
- int scale_max = 0;
const output_t *output_max = nullptr;
for (const output_t *reg_output : outputs) {
- if (scale_max < reg_output->scale) {
- scale_max = reg_output->scale;
+ if (!output_max || (output_scale_cmp(output_max, reg_output) == -1)) {
output_max = reg_output;
}
}
- if (scale_max != 0) {
+ if (output_max) {
if (r_dpi) {
*r_dpi = output_max->has_scale_fractional ?
/* Fractional DPI. */
wl_fixed_to_int(output_max->scale_fractional * base_dpi) :
/* Simple non-fractional DPI. */
- (scale_max * base_dpi);
+ (output_max->scale * base_dpi);
}
- return scale_max;
+ return output_max->scale;
}
if (r_dpi) {
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