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Ensure that a box's dimensions don't exceed the screen size

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Having windows that are bigger than the screen might be good enough for Weston, but it's not good enough for me
This commit is contained in:
Keith Bowes 2020-03-15 19:55:15 -04:00
parent 114e265eef
commit 02ecb67912
2 changed files with 17 additions and 0 deletions
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1
include/waybox/output.h
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@ -7,6 +7,7 @@
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <wlr/render/wlr_renderer.h>

16
waybox/output.c
View file

@ -1,4 +1,5 @@
#include "waybox/output.h"
#define MIN(a, b) (a < b ? a : b)
struct render_data {
struct wlr_output *output;
@ -41,6 +42,21 @@ static void render_surface(struct wlr_surface *surface, int sx, int sy, void *da
.height = surface->current.height * output->scale,
};
/* Ensure box dimensions of top-level surfaces don't exceed the output's. */
if (!strcmp(surface->role->name, "xdg_toplevel")) {
double aspect = (box.width * 1.0) / (box.height * 1.0);
if (box.x + box.height > output->height) {
box.height = output->height - box.x;
}
if (box.y + box.width > output->width) {
/* Under the rare occasions that the height is larger than the
* width, we don't want to divide by < 1 (i.e. make the width even
* wider); instead we'll multiply. */
box.width = MIN((output->width - box.y) / aspect,
(output->width - box.y) * aspect);
}
}
/*
* Those familiar with OpenGL are also familiar with the role of matrices
* in graphics programming. We need to prepare a matrix to render the view