From ff1028b5450c77ec854a6bc855fe8d8613c281e1 Mon Sep 17 00:00:00 2001
From: Simon Ser <contact@emersion.fr>
Date: Tue, 16 Feb 2021 16:24:24 +0100
Subject: [PATCH] render/gles2: setup PBO extensions

---
 include/render/gles2.h  |  5 +++++
 render/gles2/renderer.c | 13 +++++++++++++
 2 files changed, 18 insertions(+)

diff --git a/include/render/gles2.h b/include/render/gles2.h
index 714bacf56..c60159d67 100644
--- a/include/render/gles2.h
+++ b/include/render/gles2.h
@@ -48,6 +48,9 @@ struct wlr_gles2_renderer {
 		bool EXT_texture_type_2_10_10_10_REV;
 		bool OES_texture_half_float_linear;
 		bool EXT_texture_norm16;
+		bool NV_pixel_buffer_object;
+		bool OES_mapbuffer;
+		bool EXT_map_buffer_range;
 	} exts;
 
 	struct {
@@ -57,6 +60,8 @@ struct wlr_gles2_renderer {
 		PFNGLPOPDEBUGGROUPKHRPROC glPopDebugGroupKHR;
 		PFNGLPUSHDEBUGGROUPKHRPROC glPushDebugGroupKHR;
 		PFNGLEGLIMAGETARGETRENDERBUFFERSTORAGEOESPROC glEGLImageTargetRenderbufferStorageOES;
+		PFNGLMAPBUFFERRANGEEXTPROC glMapBufferRangeEXT;
+		PFNGLUNMAPBUFFEROESPROC glUnmapBufferOES;
 	} procs;
 
 	struct {
diff --git a/render/gles2/renderer.c b/render/gles2/renderer.c
index 5a2f31b55..c74df637c 100644
--- a/render/gles2/renderer.c
+++ b/render/gles2/renderer.c
@@ -780,6 +780,19 @@ struct wlr_renderer *wlr_gles2_renderer_create(struct wlr_egl *egl) {
 			"glEGLImageTargetRenderbufferStorageOES");
 	}
 
+	renderer->exts.NV_pixel_buffer_object =
+		check_gl_ext(exts_str, "GL_NV_pixel_buffer_object");
+
+	if (check_gl_ext(exts_str, "GL_OES_mapbuffer")) {
+		renderer->exts.OES_mapbuffer = true;
+		load_gl_proc(&renderer->procs.glUnmapBufferOES, "glUnmapBufferOES");
+	}
+	if (check_gl_ext(exts_str, "GL_EXT_map_buffer_range")) {
+		renderer->exts.EXT_map_buffer_range = true;
+		load_gl_proc(&renderer->procs.glMapBufferRangeEXT,
+			"glMapBufferRangeEXT");
+	}
+
 	if (renderer->exts.KHR_debug) {
 		glEnable(GL_DEBUG_OUTPUT_KHR);
 		glEnable(GL_DEBUG_OUTPUT_SYNCHRONOUS_KHR);