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From 3b52d830ed80131e7fb719a7e3c6b56005e464f1 Mon Sep 17 00:00:00 2001
From: Imagination Technologies <powervr@imgtec.com>
Date: Fri, 21 Aug 2020 12:13:28 +0100
Subject: [PATCH 038/168] gbm: add pbuffer support
The EGL backend GLX provider for XWayland may get the EGL configs it
uses to generate the GLX ones from GBM. That platform doesn't support
pbuffers. When the client tries to match GLX configs with the DRI ones,
a mismatch in the pbuffer attributes will result in the GLX config
being rejected.
Although support for creating pbuffers has been added, this isn't
required when using the EGL backend GLX provider, as indirect GLX
isn't supported.
---
src/egl/drivers/dri2/egl_dri2.h | 3 +
src/egl/drivers/dri2/platform_drm.c | 110 +++++++++++++++++++++++++---
2 files changed, 103 insertions(+), 10 deletions(-)
diff --git a/src/egl/drivers/dri2/egl_dri2.h b/src/egl/drivers/dri2/egl_dri2.h
index 8bef835ef16..29f24f57a63 100644
--- a/src/egl/drivers/dri2/egl_dri2.h
+++ b/src/egl/drivers/dri2/egl_dri2.h
@@ -473,6 +473,9 @@ struct dri2_egl_surface
/* surfaceless and device */
__DRIimage *front;
unsigned int visual;
+#ifdef HAVE_DRM_PLATFORM
+ struct gbm_bo *front_bo;
+#endif
#ifdef HAVE_WAYLAND_PLATFORM
void *swrast_front;
diff --git a/src/egl/drivers/dri2/platform_drm.c b/src/egl/drivers/dri2/platform_drm.c
index 45895a88b6c..4d08851c782 100644
--- a/src/egl/drivers/dri2/platform_drm.c
+++ b/src/egl/drivers/dri2/platform_drm.c
@@ -41,6 +41,38 @@
#include "egl_dri2.h"
#include "loader.h"
+static bool
+dri2_drm_alloc_front_image(struct dri2_egl_surface *dri2_surf)
+{
+ if (!dri2_surf->front_bo) {
+ struct dri2_egl_display *dri2_dpy =
+ dri2_egl_display(dri2_surf->base.Resource.Display);
+
+ struct gbm_dri_surface *surf = dri2_surf->gbm_surf;
+
+ dri2_surf->front_bo = gbm_bo_create(&dri2_dpy->gbm_dri->base,
+ surf->base.v0.width,
+ surf->base.v0.height,
+ surf->base.v0.format,
+ surf->base.v0.flags);
+ if (!dri2_surf->front_bo) {
+ _eglError(EGL_BAD_ALLOC, "failed to allocate front buffer");
+ return false;
+ }
+ }
+
+ return true;
+}
+
+static void
+dri2_drm_free_front_image(struct dri2_egl_surface *dri2_surf)
+{
+ if (dri2_surf->front_bo) {
+ gbm_bo_destroy(dri2_surf->front_bo);
+ dri2_surf->front_bo = NULL;
+ }
+}
+
static struct gbm_bo *
lock_front_buffer(struct gbm_surface *_surf)
{
@@ -138,8 +170,8 @@ dri2_drm_config_is_compatible(struct dri2_egl_display *dri2_dpy,
}
static _EGLSurface *
-dri2_drm_create_window_surface(_EGLDisplay *disp, _EGLConfig *conf,
- void *native_surface, const EGLint *attrib_list)
+dri2_drm_create_surface(_EGLDisplay *disp, EGLint type, _EGLConfig *conf,
+ void *native_surface, const EGLint *attrib_list)
{
struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
struct dri2_egl_config *dri2_conf = dri2_egl_config(conf);
@@ -154,11 +186,25 @@ dri2_drm_create_window_surface(_EGLDisplay *disp, _EGLConfig *conf,
return NULL;
}
- if (!dri2_init_surface(&dri2_surf->base, disp, EGL_WINDOW_BIT, conf,
+ if (!dri2_init_surface(&dri2_surf->base, disp, type, conf,
attrib_list, false, native_surface))
goto cleanup_surf;
- config = dri2_get_dri_config(dri2_conf, EGL_WINDOW_BIT,
+ if (type == EGL_PBUFFER_BIT) {
+ struct gbm_device *gbm = disp->PlatformDisplay;
+ _EGLSurface *surf = &dri2_surf->base;
+
+ assert(!surface);
+
+ surface = gbm_surface_create(gbm, surf->Width, surf->Height,
+ conf->NativeVisualID, GBM_BO_USE_RENDERING);
+ if (!surface) {
+ _eglError(EGL_BAD_ALLOC, "Failed to allocate pbuffer GBM surface");
+ goto cleanup_surf;
+ }
+ }
+
+ config = dri2_get_dri_config(dri2_conf, type,
dri2_surf->base.GLColorspace);
if (!config) {
@@ -183,11 +229,22 @@ dri2_drm_create_window_surface(_EGLDisplay *disp, _EGLConfig *conf,
return &dri2_surf->base;
cleanup_surf:
+ if (type == EGL_PBUFFER_BIT && surface != NULL)
+ gbm_surface_destroy(surface);
+
free(dri2_surf);
return NULL;
}
+static _EGLSurface *
+dri2_drm_create_window_surface(_EGLDisplay *disp, _EGLConfig *conf,
+ void *native_surface, const EGLint *attrib_list)
+{
+ return dri2_drm_create_surface(disp, EGL_WINDOW_BIT, conf,
+ native_surface, attrib_list);
+}
+
static _EGLSurface *
dri2_drm_create_pixmap_surface(_EGLDisplay *disp, _EGLConfig *conf,
void *native_window, const EGLint *attrib_list)
@@ -202,6 +259,14 @@ dri2_drm_create_pixmap_surface(_EGLDisplay *disp, _EGLConfig *conf,
return NULL;
}
+static _EGLSurface *
+dri2_drm_create_pbuffer_surface(_EGLDisplay *disp, _EGLConfig *conf,
+ const EGLint *attrib_list)
+{
+ return dri2_drm_create_surface(disp, EGL_PBUFFER_BIT, conf,
+ NULL, attrib_list);
+}
+
static EGLBoolean
dri2_drm_destroy_surface(_EGLDisplay *disp, _EGLSurface *surf)
{
@@ -217,6 +282,11 @@ dri2_drm_destroy_surface(_EGLDisplay *disp, _EGLSurface *surf)
dri2_egl_surface_free_local_buffers(dri2_surf);
+ dri2_drm_free_front_image(dri2_surf);
+
+ if (surf->Type == EGL_PBUFFER_BIT)
+ gbm_surface_destroy(&dri2_surf->gbm_surf->base);
+
dri2_fini_surface(surf);
free(surf);
@@ -402,12 +472,27 @@ dri2_drm_image_get_buffers(__DRIdrawable *driDrawable,
struct dri2_egl_surface *dri2_surf = loaderPrivate;
struct gbm_dri_bo *bo;
- if (get_back_bo(dri2_surf) < 0)
- return 0;
+ buffers->image_mask = 0;
+ buffers->front = NULL;
+ buffers->back = NULL;
- bo = gbm_dri_bo(dri2_surf->back->bo);
- buffers->image_mask = __DRI_IMAGE_BUFFER_BACK;
- buffers->back = bo->image;
+ if (buffer_mask & __DRI_IMAGE_BUFFER_FRONT) {
+ if (!dri2_drm_alloc_front_image(dri2_surf))
+ return 0;
+
+ bo = gbm_dri_bo(dri2_surf->front_bo);
+ buffers->image_mask |= __DRI_IMAGE_BUFFER_FRONT;
+ buffers->front = bo->image;
+ }
+
+ if (buffer_mask & __DRI_IMAGE_BUFFER_BACK) {
+ if (get_back_bo(dri2_surf) < 0)
+ return 0;
+
+ bo = gbm_dri_bo(dri2_surf->back->bo);
+ buffers->image_mask |= __DRI_IMAGE_BUFFER_BACK;
+ buffers->back = bo->image;
+ }
return 1;
}
@@ -425,6 +510,9 @@ dri2_drm_swap_buffers(_EGLDisplay *disp, _EGLSurface *draw)
struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
+ if (dri2_surf->base.Type != EGL_WINDOW_BIT)
+ return EGL_TRUE;
+
if (!dri2_dpy->flush) {
dri2_dpy->core->swapBuffers(dri2_surf->dri_drawable);
return EGL_TRUE;
@@ -648,7 +736,8 @@ drm_add_configs_for_visuals(_EGLDisplay *disp)
};
dri2_conf = dri2_add_config(disp, dri2_dpy->driver_configs[i],
- config_count + 1, EGL_WINDOW_BIT, attr_list, NULL, NULL);
+ config_count + 1, EGL_WINDOW_BIT | EGL_PBUFFER_BIT,
+ attr_list, NULL, NULL);
if (dri2_conf) {
if (dri2_conf->base.ConfigID == config_count + 1)
config_count++;
@@ -672,6 +761,7 @@ static const struct dri2_egl_display_vtbl dri2_drm_display_vtbl = {
.authenticate = dri2_drm_authenticate,
.create_window_surface = dri2_drm_create_window_surface,
.create_pixmap_surface = dri2_drm_create_pixmap_surface,
+ .create_pbuffer_surface = dri2_drm_create_pbuffer_surface,
.destroy_surface = dri2_drm_destroy_surface,
.create_image = dri2_drm_create_image_khr,
.swap_buffers = dri2_drm_swap_buffers,
--
2.17.1
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