From nobody Wed Nov 5 17:25:26 2025 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zoho.com; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1496747228794656.2643723136104; Tue, 6 Jun 2017 04:07:08 -0700 (PDT) Received: from localhost ([::1]:37535 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dICKF-00065g-V2 for importer@patchew.org; Tue, 06 Jun 2017 07:07:04 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:38193) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dICIV-00050q-2j for qemu-devel@nongnu.org; Tue, 06 Jun 2017 07:05:19 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dICIT-0002in-1X for qemu-devel@nongnu.org; Tue, 06 Jun 2017 07:05:15 -0400 Received: from mx1.redhat.com ([209.132.183.28]:34432) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1dICIS-0002iV-Pr for qemu-devel@nongnu.org; Tue, 06 Jun 2017 07:05:12 -0400 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id DD4F661B91 for ; Tue, 6 Jun 2017 11:05:11 +0000 (UTC) Received: from nilsson.home.kraxel.org (ovpn-116-106.ams2.redhat.com [10.36.116.106]) by smtp.corp.redhat.com (Postfix) with ESMTP id F0B3217D64; Tue, 6 Jun 2017 11:05:03 +0000 (UTC) Received: by nilsson.home.kraxel.org (Postfix, from userid 500) id DFE8780E99; Tue, 6 Jun 2017 13:05:01 +0200 (CEST) DMARC-Filter: OpenDMARC Filter v1.3.2 mx1.redhat.com DD4F661B91 Authentication-Results: ext-mx10.extmail.prod.ext.phx2.redhat.com; dmarc=none (p=none dis=none) header.from=redhat.com Authentication-Results: ext-mx10.extmail.prod.ext.phx2.redhat.com; spf=pass smtp.mailfrom=kraxel@redhat.com DKIM-Filter: OpenDKIM Filter v2.11.0 mx1.redhat.com DD4F661B91 From: Gerd Hoffmann To: qemu-devel@nongnu.org Date: Tue, 6 Jun 2017 13:04:56 +0200 Message-Id: <20170606110459.9771-2-kraxel@redhat.com> In-Reply-To: <20170606110459.9771-1-kraxel@redhat.com> References: <20170606110459.9771-1-kraxel@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.39]); Tue, 06 Jun 2017 11:05:12 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH 1/4] egl-helpers: add helpers to handle opengl framebuffers X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Gerd Hoffmann Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail: RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Add a collection of egl_fb_*() helper functions to manage and use opengl framebuffers, which is a common pattern in UI code with opengl support. Signed-off-by: Gerd Hoffmann Reviewed-by: Marc-Andr=C3=A9 Lureau --- include/ui/egl-helpers.h | 14 ++++++++++ ui/egl-helpers.c | 69 ++++++++++++++++++++++++++++++++++++++++++++= ++++ 2 files changed, 83 insertions(+) diff --git a/include/ui/egl-helpers.h b/include/ui/egl-helpers.h index c785d60e91..01aa45fb32 100644 --- a/include/ui/egl-helpers.h +++ b/include/ui/egl-helpers.h @@ -8,6 +8,20 @@ extern EGLDisplay *qemu_egl_display; extern EGLConfig qemu_egl_config; =20 +typedef struct egl_fb { + int width; + int height; + GLuint texture; + GLuint framebuffer; + bool delete_texture; +} egl_fb; + +void egl_fb_destroy(egl_fb *fb); +void egl_fb_create_for_tex(egl_fb *fb, int width, int height, GLuint textu= re); +void egl_fb_create_new_tex(egl_fb *fb, int width, int height); +void egl_fb_blit(egl_fb *dst, egl_fb *src, bool flip); +void egl_fb_read(void *dst, egl_fb *src); + #ifdef CONFIG_OPENGL_DMABUF =20 extern int qemu_egl_rn_fd; diff --git a/ui/egl-helpers.c b/ui/egl-helpers.c index 4a4d3370ee..b14250ae62 100644 --- a/ui/egl-helpers.c +++ b/ui/egl-helpers.c @@ -24,6 +24,75 @@ EGLDisplay *qemu_egl_display; EGLConfig qemu_egl_config; =20 +/* ------------------------------------------------------------------ */ + +void egl_fb_destroy(egl_fb *fb) +{ + if (!fb->framebuffer) { + return; + } + + if (fb->delete_texture) { + glDeleteTextures(1, &fb->texture); + fb->delete_texture =3D false; + } + glDeleteFramebuffers(1, &fb->framebuffer); + + fb->width =3D 0; + fb->height =3D 0; + fb->texture =3D 0; + fb->framebuffer =3D 0; +} + +void egl_fb_create_for_tex(egl_fb *fb, int width, int height, GLuint textu= re) +{ + fb->width =3D width; + fb->height =3D height; + fb->texture =3D texture; + if (!fb->framebuffer) { + glGenFramebuffers(1, &fb->framebuffer); + } + + glBindFramebuffer(GL_FRAMEBUFFER_EXT, fb->framebuffer); + glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT, + GL_TEXTURE_2D, fb->texture, 0); +} + +void egl_fb_create_new_tex(egl_fb *fb, int width, int height) +{ + GLuint texture; + + glGenTextures(1, &texture); + glBindTexture(GL_TEXTURE_2D, texture); + glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, width, height, + 0, GL_BGRA, GL_UNSIGNED_BYTE, 0); + + egl_fb_create_for_tex(fb, width, height, texture); + fb->delete_texture =3D true; +} + +void egl_fb_blit(egl_fb *dst, egl_fb *src, bool flip) +{ + GLuint y1, y2; + + glBindFramebuffer(GL_READ_FRAMEBUFFER, src->framebuffer); + glBindFramebuffer(GL_DRAW_FRAMEBUFFER, dst->framebuffer); + glViewport(0, 0, dst->width, dst->height); + y1 =3D flip ? src->height : 0; + y2 =3D flip ? 0 : src->height; + glBlitFramebuffer(0, y1, src->width, y2, + 0, 0, dst->width, dst->height, + GL_COLOR_BUFFER_BIT, GL_NEAREST); +} + +void egl_fb_read(void *dst, egl_fb *src) +{ + glBindFramebuffer(GL_READ_FRAMEBUFFER, src->framebuffer); + glReadBuffer(GL_COLOR_ATTACHMENT0_EXT); + glReadPixels(0, 0, src->width, src->height, + GL_BGRA, GL_UNSIGNED_BYTE, dst); +} + /* ---------------------------------------------------------------------- = */ =20 #ifdef CONFIG_OPENGL_DMABUF --=20 2.9.3