From 1b9ebcf6452c913603d38da2685c56e55ee13063 Mon Sep 17 00:00:00 2001
From: emersion <contact@emersion.fr>
Date: Sat, 10 Nov 2018 16:06:02 +0100
Subject: output: make wlr_egl flip the damage

---
 render/egl.c | 18 +++++++++++++++---
 1 file changed, 15 insertions(+), 3 deletions(-)

(limited to 'render')

diff --git a/render/egl.c b/render/egl.c
index 644f94ac..cc00dece 100644
--- a/render/egl.c
+++ b/render/egl.c
@@ -1,11 +1,12 @@
 #include <assert.h>
-#include <stdio.h>
+#include <drm_fourcc.h>
 #include <EGL/egl.h>
 #include <EGL/eglext.h>
+#include <stdio.h>
 #include <stdlib.h>
-#include <drm_fourcc.h>
 #include <wlr/render/egl.h>
 #include <wlr/util/log.h>
+#include <wlr/util/region.h>
 #include "glapi.h"
 
 static bool egl_get_config(EGLDisplay disp, EGLint *attribs, EGLConfig *out,
@@ -329,9 +330,18 @@ bool wlr_egl_swap_buffers(struct wlr_egl *egl, EGLSurface surface,
 	EGLBoolean ret;
 	if (damage != NULL && (egl->exts.swap_buffers_with_damage_ext ||
 				egl->exts.swap_buffers_with_damage_khr)) {
+		EGLint width = 0, height = 0;
+		eglQuerySurface(egl->display, surface, EGL_WIDTH, &width);
+		eglQuerySurface(egl->display, surface, EGL_HEIGHT, &height);
+
+		pixman_region32_t flipped_damage;
+		pixman_region32_init(&flipped_damage);
+		wlr_region_transform(&flipped_damage, damage,
+			WL_OUTPUT_TRANSFORM_FLIPPED_180, width, height);
+
 		int nrects;
 		pixman_box32_t *rects =
-			pixman_region32_rectangles(damage, &nrects);
+			pixman_region32_rectangles(&flipped_damage, &nrects);
 		EGLint egl_damage[4 * nrects];
 		for (int i = 0; i < nrects; ++i) {
 			egl_damage[4*i] = rects[i].x1;
@@ -340,6 +350,8 @@ bool wlr_egl_swap_buffers(struct wlr_egl *egl, EGLSurface surface,
 			egl_damage[4*i + 3] = rects[i].y2 - rects[i].y1;
 		}
 
+		pixman_region32_fini(&flipped_damage);
+
 		if (egl->exts.swap_buffers_with_damage_ext) {
 			ret = eglSwapBuffersWithDamageEXT(egl->display, surface, egl_damage,
 				nrects);
-- 
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