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From d47bea7c915ea2c9d9b2f81724509760bd769df4 Mon Sep 17 00:00:00 2001
From: Georges Basile Stavracas Neto <georges.stavracas@gmail.com>
Date: Sat, 14 Mar 2020 14:26:02 -0300
Subject: [PATCH 25/25] libobs-opengl: Implement DMA-BUF importing on EGL
renderers
This is currently extremely limited. It only supports XRGB8888
DMA-BUFs for now, which seems to be a sensible default.
---
libobs-opengl/CMakeLists.txt | 1 +
libobs-opengl/gl-egl-common.c | 340 +++++++++++++++++++++++++++++++++
libobs-opengl/gl-egl-common.h | 14 ++
libobs-opengl/gl-wayland-egl.c | 18 +-
libobs-opengl/gl-x11-egl.c | 15 +-
5 files changed, 367 insertions(+), 21 deletions(-)
create mode 100644 libobs-opengl/gl-egl-common.c
create mode 100644 libobs-opengl/gl-egl-common.h
diff --git a/libobs-opengl/CMakeLists.txt b/libobs-opengl/CMakeLists.txt
index 6476e0be..d4179806 100644
--- a/libobs-opengl/CMakeLists.txt
+++ b/libobs-opengl/CMakeLists.txt
@@ -49,6 +49,7 @@ else()
${X11_XCB_LIBRARIES})
set(libobs-opengl_PLATFORM_SOURCES
+ gl-egl-common.c
gl-nix.c
gl-x11-egl.c
gl-x11-glx.c)
diff --git a/libobs-opengl/gl-egl-common.c b/libobs-opengl/gl-egl-common.c
new file mode 100644
index 00000000..0696839e
--- /dev/null
+++ b/libobs-opengl/gl-egl-common.c
@@ -0,0 +1,340 @@
+/******************************************************************************
+ Copyright (C) 2020 by Georges Basile Stavracas Neto <georges.stavracas@gmail.com>
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+******************************************************************************/
+
+#include "gl-egl-common.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include <glad/glad_egl.h>
+
+#if defined(__linux__)
+
+#include <linux/types.h>
+#include <asm/ioctl.h>
+typedef unsigned int drm_handle_t;
+
+#else
+
+#include <stdint.h>
+#include <sys/ioccom.h>
+#include <sys/types.h>
+typedef int8_t __s8;
+typedef uint8_t __u8;
+typedef int16_t __s16;
+typedef uint16_t __u16;
+typedef int32_t __s32;
+typedef uint32_t __u32;
+typedef int64_t __s64;
+typedef uint64_t __u64;
+typedef size_t __kernel_size_t;
+typedef unsigned long drm_handle_t;
+
+#endif
+
+typedef void(APIENTRYP PFNGLEGLIMAGETARGETTEXTURE2DOESPROC)(
+ GLenum target, GLeglImageOES image);
+static PFNGLEGLIMAGETARGETTEXTURE2DOESPROC glEGLImageTargetTexture2DOES;
+
+/* copied from drm_fourcc.h */
+
+#define fourcc_code(a, b, c, d) \
+ ((__u32)(a) | ((__u32)(b) << 8) | ((__u32)(c) << 16) | \
+ ((__u32)(d) << 24))
+#define DRM_FORMAT_INVALID 0
+#define DRM_FORMAT_R8 fourcc_code('R', '8', ' ', ' ') /* [7:0] R */
+#define DRM_FORMAT_R16 \
+ fourcc_code('R', '1', '6', ' ') /* [15:0] R little endian */
+#define DRM_FORMAT_RG88 \
+ fourcc_code('R', 'G', '8', '8') /* [15:0] R:G 8:8 little endian */
+#define DRM_FORMAT_ABGR8888 \
+ fourcc_code('A', 'B', '2', \
+ '4') /* [31:0] A:B:G:R 8:8:8:8 little endian */
+#define DRM_FORMAT_ABGR2101010 \
+ fourcc_code('A', 'B', '3', \
+ '0') /* [31:0] A:B:G:R 2:10:10:10 little endian */
+#define DRM_FORMAT_ABGR16161616F \
+ fourcc_code('A', 'B', '4', \
+ 'H') /* [63:0] A:B:G:R 16:16:16:16 little endian */
+#define DRM_FORMAT_ARGB8888 \
+ fourcc_code('A', 'R', '2', \
+ '4') /* [31:0] A:R:G:B 8:8:8:8 little endian */
+#define DRM_FORMAT_XRGB8888 \
+ fourcc_code('X', 'R', '2', \
+ '4') /* [31:0] x:R:G:B 8:8:8:8 little endian */
+
+static bool find_gl_extension(const char *extension)
+{
+ GLint n, i;
+
+ glGetIntegerv(GL_NUM_EXTENSIONS, &n);
+ for (i = 0; i < n; i++) {
+ const char *e = (char *)glGetStringi(GL_EXTENSIONS, i);
+ if (extension && strcmp(e, extension) == 0)
+ return true;
+ }
+ return false;
+}
+
+static bool init_egl_image_target_texture_2d_ext(void)
+{
+ static bool initialized = false;
+
+ if (!initialized) {
+ initialized = true;
+
+ if (!find_gl_extension("GL_OES_EGL_image")) {
+ blog(LOG_ERROR, "No GL_OES_EGL_image");
+ return false;
+ }
+
+ glEGLImageTargetTexture2DOES =
+ (PFNGLEGLIMAGETARGETTEXTURE2DOESPROC)eglGetProcAddress(
+ "glEGLImageTargetTexture2DOES");
+ }
+
+ if (!glEGLImageTargetTexture2DOES)
+ return false;
+
+ return true;
+}
+
+static inline enum gs_color_format gs_format_to_drm_format(uint32_t drm_format)
+{
+ switch (drm_format) {
+ case GS_R8:
+ return DRM_FORMAT_R8;
+ case GS_RGBA:
+ return DRM_FORMAT_ABGR8888;
+ case GS_BGRX:
+ return DRM_FORMAT_XRGB8888;
+ case GS_BGRA:
+ return DRM_FORMAT_ARGB8888;
+ case GS_R10G10B10A2:
+ return DRM_FORMAT_ABGR2101010;
+ case GS_R16:
+ return DRM_FORMAT_R16;
+ case GS_RGBA16F:
+ return DRM_FORMAT_ABGR16161616F;
+ case GS_R8G8:
+ return DRM_FORMAT_RG88;
+ case GS_A8:
+ case GS_R16F:
+ case GS_RGBA16:
+ case GS_RG16F:
+ case GS_R32F:
+ case GS_RG32F:
+ case GS_RGBA32F:
+ case GS_DXT1:
+ case GS_DXT3:
+ case GS_DXT5:
+ case GS_UNKNOWN:
+ return DRM_FORMAT_INVALID;
+ }
+
+ return DRM_FORMAT_INVALID;
+}
+
+static EGLImageKHR
+create_dmabuf_egl_image(EGLDisplay egl_display, unsigned int width,
+ unsigned int height, uint32_t drm_format,
+ uint32_t n_planes, const int *fds,
+ const uint32_t *strides, const uint32_t *offsets,
+ const uint64_t *modifiers)
+{
+ EGLAttrib attribs[47];
+ int atti = 0;
+
+ /* This requires the Mesa commit in
+ * Mesa 10.3 (08264e5dad4df448e7718e782ad9077902089a07) or
+ * Mesa 10.2.7 (55d28925e6109a4afd61f109e845a8a51bd17652).
+ * Otherwise Mesa closes the fd behind our back and re-importing
+ * will fail.
+ * https://bugs.freedesktop.org/show_bug.cgi?id=76188
+ * */
+
+ attribs[atti++] = EGL_WIDTH;
+ attribs[atti++] = width;
+ attribs[atti++] = EGL_HEIGHT;
+ attribs[atti++] = height;
+ attribs[atti++] = EGL_LINUX_DRM_FOURCC_EXT;
+ attribs[atti++] = drm_format;
+
+ if (n_planes > 0) {
+ attribs[atti++] = EGL_DMA_BUF_PLANE0_FD_EXT;
+ attribs[atti++] = fds[0];
+ attribs[atti++] = EGL_DMA_BUF_PLANE0_OFFSET_EXT;
+ attribs[atti++] = offsets[0];
+ attribs[atti++] = EGL_DMA_BUF_PLANE0_PITCH_EXT;
+ attribs[atti++] = strides[0];
+ if (modifiers) {
+ attribs[atti++] = EGL_DMA_BUF_PLANE0_MODIFIER_LO_EXT;
+ attribs[atti++] = modifiers[0] & 0xFFFFFFFF;
+ attribs[atti++] = EGL_DMA_BUF_PLANE0_MODIFIER_HI_EXT;
+ attribs[atti++] = modifiers[0] >> 32;
+ }
+ }
+
+ if (n_planes > 1) {
+ attribs[atti++] = EGL_DMA_BUF_PLANE1_FD_EXT;
+ attribs[atti++] = fds[1];
+ attribs[atti++] = EGL_DMA_BUF_PLANE1_OFFSET_EXT;
+ attribs[atti++] = offsets[1];
+ attribs[atti++] = EGL_DMA_BUF_PLANE1_PITCH_EXT;
+ attribs[atti++] = strides[1];
+ if (modifiers) {
+ attribs[atti++] = EGL_DMA_BUF_PLANE1_MODIFIER_LO_EXT;
+ attribs[atti++] = modifiers[1] & 0xFFFFFFFF;
+ attribs[atti++] = EGL_DMA_BUF_PLANE1_MODIFIER_HI_EXT;
+ attribs[atti++] = modifiers[1] >> 32;
+ }
+ }
+
+ if (n_planes > 2) {
+ attribs[atti++] = EGL_DMA_BUF_PLANE2_FD_EXT;
+ attribs[atti++] = fds[2];
+ attribs[atti++] = EGL_DMA_BUF_PLANE2_OFFSET_EXT;
+ attribs[atti++] = offsets[2];
+ attribs[atti++] = EGL_DMA_BUF_PLANE2_PITCH_EXT;
+ attribs[atti++] = strides[2];
+ if (modifiers) {
+ attribs[atti++] = EGL_DMA_BUF_PLANE2_MODIFIER_LO_EXT;
+ attribs[atti++] = modifiers[2] & 0xFFFFFFFF;
+ attribs[atti++] = EGL_DMA_BUF_PLANE2_MODIFIER_HI_EXT;
+ attribs[atti++] = modifiers[2] >> 32;
+ }
+ }
+
+ if (n_planes > 3) {
+ attribs[atti++] = EGL_DMA_BUF_PLANE3_FD_EXT;
+ attribs[atti++] = fds[3];
+ attribs[atti++] = EGL_DMA_BUF_PLANE3_OFFSET_EXT;
+ attribs[atti++] = offsets[3];
+ attribs[atti++] = EGL_DMA_BUF_PLANE3_PITCH_EXT;
+ attribs[atti++] = strides[3];
+ if (modifiers) {
+ attribs[atti++] = EGL_DMA_BUF_PLANE3_MODIFIER_LO_EXT;
+ attribs[atti++] = modifiers[3] & 0xFFFFFFFF;
+ attribs[atti++] = EGL_DMA_BUF_PLANE3_MODIFIER_HI_EXT;
+ attribs[atti++] = modifiers[3] >> 32;
+ }
+ }
+
+ attribs[atti++] = EGL_NONE;
+
+ return eglCreateImage(egl_display, EGL_NO_CONTEXT,
+ EGL_LINUX_DMA_BUF_EXT, 0, attribs);
+}
+
+struct gs_texture *
+gl_egl_create_dmabuf_image(EGLDisplay egl_display, unsigned int width,
+ unsigned int height,
+ enum gs_color_format color_format, uint32_t n_planes,
+ const int *fds, const uint32_t *strides,
+ const uint32_t *offsets, const uint64_t *modifiers)
+{
+ struct gs_texture *texture = NULL;
+ EGLImage egl_image;
+ uint32_t drm_format;
+
+ if (!init_egl_image_target_texture_2d_ext())
+ return NULL;
+
+ drm_format = gs_format_to_drm_format(color_format);
+ if (drm_format == DRM_FORMAT_INVALID) {
+ blog(LOG_ERROR, "Invalid or unsupported image format");
+ return NULL;
+ }
+
+ egl_image = create_dmabuf_egl_image(egl_display, width, height,
+ drm_format, n_planes, fds, strides,
+ offsets, modifiers);
+ if (egl_image == EGL_NO_IMAGE) {
+ blog(LOG_ERROR, "Cannot create EGLImage: %s",
+ gl_egl_error_to_string(eglGetError()));
+ return NULL;
+ }
+
+ texture = gs_texture_create(width, height, color_format, 1, NULL,
+ GS_DYNAMIC);
+ const GLuint gltex = *(GLuint *)gs_texture_get_obj(texture);
+
+ glBindTexture(GL_TEXTURE_2D, gltex);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+
+ glEGLImageTargetTexture2DOES(GL_TEXTURE_2D, egl_image);
+
+ glBindTexture(GL_TEXTURE_2D, 0);
+ eglDestroyImage(egl_display, egl_image);
+
+ return texture;
+}
+
+const char *gl_egl_error_to_string(EGLint error_number)
+{
+ switch (error_number) {
+ case EGL_SUCCESS:
+ return "The last function succeeded without error.";
+ break;
+ case EGL_NOT_INITIALIZED:
+ return "EGL is not initialized, or could not be initialized, for the specified EGL display connection.";
+ break;
+ case EGL_BAD_ACCESS:
+ return "EGL cannot access a requested resource (for example a context is bound in another thread).";
+ break;
+ case EGL_BAD_ALLOC:
+ return "EGL failed to allocate resources for the requested operation.";
+ break;
+ case EGL_BAD_ATTRIBUTE:
+ return "An unrecognized attribute or attribute value was passed in the attribute list.";
+ break;
+ case EGL_BAD_CONTEXT:
+ return "An EGLContext argument does not name a valid EGL rendering context.";
+ break;
+ case EGL_BAD_CONFIG:
+ return "An EGLConfig argument does not name a valid EGL frame buffer configuration.";
+ break;
+ case EGL_BAD_CURRENT_SURFACE:
+ return "The current surface of the calling thread is a window, pixel buffer or pixmap that is no longer valid.";
+ break;
+ case EGL_BAD_DISPLAY:
+ return "An EGLDisplay argument does not name a valid EGL display connection.";
+ break;
+ case EGL_BAD_SURFACE:
+ return "An EGLSurface argument does not name a valid surface (window, pixel buffer or pixmap) configured for GL rendering.";
+ break;
+ case EGL_BAD_MATCH:
+ return "Arguments are inconsistent (for example, a valid context requires buffers not supplied by a valid surface).";
+ break;
+ case EGL_BAD_PARAMETER:
+ return "One or more argument values are invalid.";
+ break;
+ case EGL_BAD_NATIVE_PIXMAP:
+ return "A NativePixmapType argument does not refer to a valid native pixmap.";
+ break;
+ case EGL_BAD_NATIVE_WINDOW:
+ return "A NativeWindowType argument does not refer to a valid native window.";
+ break;
+ case EGL_CONTEXT_LOST:
+ return "A power management event has occurred. The application must destroy all contexts and reinitialise OpenGL ES state and objects to continue rendering. ";
+ break;
+ default:
+ return "Unknown error";
+ break;
+ }
+}
diff --git a/libobs-opengl/gl-egl-common.h b/libobs-opengl/gl-egl-common.h
new file mode 100644
index 00000000..35811387
--- /dev/null
+++ b/libobs-opengl/gl-egl-common.h
@@ -0,0 +1,14 @@
+#pragma once
+
+#include "gl-nix.h"
+
+#include <glad/glad_egl.h>
+
+const char *gl_egl_error_to_string(EGLint error_number);
+
+struct gs_texture *
+gl_egl_create_dmabuf_image(EGLDisplay egl_display, unsigned int width,
+ unsigned int height,
+ enum gs_color_format color_format, uint32_t n_planes,
+ const int *fds, const uint32_t *strides,
+ const uint32_t *offsets, const uint64_t *modifiers);
diff --git a/libobs-opengl/gl-wayland-egl.c b/libobs-opengl/gl-wayland-egl.c
index 3968736d..299fe7ea 100644
--- a/libobs-opengl/gl-wayland-egl.c
+++ b/libobs-opengl/gl-wayland-egl.c
@@ -17,6 +17,8 @@
#include "gl-wayland-egl.h"
+#include "gl-egl-common.h"
+
#include <wayland-client.h>
#include <wayland-egl.h>
@@ -325,17 +327,11 @@ static struct gs_texture *gl_wayland_egl_device_texture_create_from_dmabuf(
const uint32_t *strides, const uint32_t *offsets,
const uint64_t *modifiers)
{
- UNUSED_PARAMETER(device);
- UNUSED_PARAMETER(width);
- UNUSED_PARAMETER(height);
- UNUSED_PARAMETER(color_format);
- UNUSED_PARAMETER(n_planes);
- UNUSED_PARAMETER(fds);
- UNUSED_PARAMETER(strides);
- UNUSED_PARAMETER(offsets);
- UNUSED_PARAMETER(modifiers);
-
- return NULL;
+ struct gl_platform *plat = device->plat;
+
+ return gl_egl_create_dmabuf_image(plat->display, width, height,
+ color_format, n_planes, fds, strides,
+ offsets, modifiers);
}
static const struct gl_winsys_vtable egl_wayland_winsys_vtable = {
diff --git a/libobs-opengl/gl-x11-egl.c b/libobs-opengl/gl-x11-egl.c
index 7a9c5975..d56f6b71 100644
--- a/libobs-opengl/gl-x11-egl.c
+++ b/libobs-opengl/gl-x11-egl.c
@@ -29,6 +29,7 @@
#include <stdio.h>
+#include "gl-egl-common.h"
#include "gl-x11-egl.h"
#include <glad/glad_egl.h>
@@ -640,17 +641,11 @@ static struct gs_texture *gl_x11_egl_device_texture_create_from_dmabuf(
const uint32_t *strides, const uint32_t *offsets,
const uint64_t *modifiers)
{
- UNUSED_PARAMETER(device);
- UNUSED_PARAMETER(width);
- UNUSED_PARAMETER(height);
- UNUSED_PARAMETER(color_format);
- UNUSED_PARAMETER(n_planes);
- UNUSED_PARAMETER(fds);
- UNUSED_PARAMETER(strides);
- UNUSED_PARAMETER(offsets);
- UNUSED_PARAMETER(modifiers);
+ struct gl_platform *plat = device->plat;
- return NULL;
+ return gl_egl_create_dmabuf_image(plat->edisplay, width, height,
+ color_format, n_planes, fds, strides,
+ offsets, modifiers);
}
static const struct gl_winsys_vtable egl_x11_winsys_vtable = {
--
2.28.0
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