On 4/9/19 3:52 PM, Lionel Landwerlin wrote:
On 09/04/2019 14:31, Samuel Pitoiset wrote:
This is common to all Vulkan drivers and all WSI.

v2: - store the override in wsi_device_init()
     - do not abort when an invalid value is detected
     - check supported present modes

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=107391
Signed-off-by: Samuel Pitoiset <samuel.pitoi...@gmail.com>
---
  src/vulkan/wsi/wsi_common.c         | 67 +++++++++++++++++++++++++++++
  src/vulkan/wsi/wsi_common.h         |  1 +
  src/vulkan/wsi/wsi_common_display.c |  2 +-
  src/vulkan/wsi/wsi_common_private.h |  4 ++
  src/vulkan/wsi/wsi_common_wayland.c |  2 +-
  src/vulkan/wsi/wsi_common_x11.c     |  2 +-
  6 files changed, 75 insertions(+), 3 deletions(-)

diff --git a/src/vulkan/wsi/wsi_common.c b/src/vulkan/wsi/wsi_common.c
index 3cba0a4b06e..1d70b04e18b 100644
--- a/src/vulkan/wsi/wsi_common.c
+++ b/src/vulkan/wsi/wsi_common.c
@@ -29,6 +29,8 @@
  #include <time.h>
  #include <unistd.h>
  #include <xf86drm.h>
+#include <stdlib.h>
+#include <stdio.h>
    VkResult
  wsi_device_init(struct wsi_device *wsi,
@@ -112,6 +114,8 @@ wsi_device_init(struct wsi_device *wsi,
        goto fail;
  #endif
  +   wsi->override_present_mode = getenv("MESA_VK_WSI_PRESENT_MODE");
+
     return VK_SUCCESS;
    fail:
@@ -202,6 +206,69 @@ fail:
     return result;
  }
  +static bool
+wsi_swapchain_is_present_mode_supported(struct wsi_device *wsi,
+                                        const VkSwapchainCreateInfoKHR *pCreateInfo,
+                                        VkPresentModeKHR mode)
+{
+      ICD_FROM_HANDLE(VkIcdSurfaceBase, surface, pCreateInfo->surface);
+      struct wsi_interface *iface = wsi->wsi[surface->platform];
+      VkPresentModeKHR *present_modes;
+      uint32_t present_mode_count;
+      bool supported = false;
+      VkResult result;
+
+      result = iface->get_present_modes(surface, &present_mode_count, NULL);
+      if (result != VK_SUCCESS)
+         return supported;
+
+      present_modes = malloc(present_mode_count * sizeof(*present_modes));
+      if (!present_modes)
+         return supported;
+
+      result = iface->get_present_modes(surface, &present_mode_count,
+                                        present_modes);
+      if (result != VK_SUCCESS)
+         goto fail;
+
+      for (uint32_t i = 0; i < present_mode_count; i++) {
+         if (present_modes[i] == mode)
+            supported = true;
+      }
+
+fail:
+      free(present_modes);
+      return supported;
+}
+
+enum VkPresentModeKHR
+wsi_swapchain_get_present_mode(struct wsi_device *wsi,
+                               const VkSwapchainCreateInfoKHR *pCreateInfo)
+{
+   VkPresentModeKHR mode;
+
+   if (!wsi->override_present_mode)
+      return pCreateInfo->presentMode;
+
+   if (!strcmp(wsi->override_present_mode, "fifo")) {
+      mode = VK_PRESENT_MODE_FIFO_KHR;
+   } else if (!strcmp(wsi->override_present_mode, "mailbox")) {
+      mode = VK_PRESENT_MODE_MAILBOX_KHR;
+   } else if (!strcmp(wsi->override_present_mode, "immediate")) {
+      mode = VK_PRESENT_MODE_IMMEDIATE_KHR;
+   } else {
+      fprintf(stderr, "Invalid MESA_VK_WSI_PRESENT_MODE value!\n");
+      return pCreateInfo->presentMode;
+   }


I would put the conversion of string -> VkPresentModeKHR in the init function.

You can use VK_PRESENT_MODE_MAX_ENUM_KHR as an unset value.

I was going to do that, and I changed my mind. :)

I will send v3 soon.



Otherwise looks good, thanks for the update :)


-Lionel


+
+   if (!wsi_swapchain_is_present_mode_supported(wsi, pCreateInfo, mode)) {
+      fprintf(stderr, "Unsupported MESA_VK_WSI_PRESENT_MODE value!\n");
+      return pCreateInfo->presentMode;
+   }
+
+   return mode;
+}
+
  void
  wsi_swapchain_finish(struct wsi_swapchain *chain)
  {
diff --git a/src/vulkan/wsi/wsi_common.h b/src/vulkan/wsi/wsi_common.h
index e693e2be425..5ca376b4c49 100644
--- a/src/vulkan/wsi/wsi_common.h
+++ b/src/vulkan/wsi/wsi_common.h
@@ -101,6 +101,7 @@ struct wsi_device {
       bool supports_modifiers;
     uint32_t maxImageDimension2D;
+   const char *override_present_mode;
       uint64_t (*image_get_modifier)(VkImage image);
  diff --git a/src/vulkan/wsi/wsi_common_display.c b/src/vulkan/wsi/wsi_common_display.c
index 09c18315623..74ed36ed646 100644
--- a/src/vulkan/wsi/wsi_common_display.c
+++ b/src/vulkan/wsi/wsi_common_display.c
@@ -1757,7 +1757,7 @@ wsi_display_surface_create_swapchain(
     chain->base.get_wsi_image = wsi_display_get_wsi_image;
     chain->base.acquire_next_image = wsi_display_acquire_next_image;
     chain->base.queue_present = wsi_display_queue_present;
-   chain->base.present_mode = create_info->presentMode;
+   chain->base.present_mode = wsi_swapchain_get_present_mode(wsi_device, create_info);
     chain->base.image_count = num_images;
       chain->wsi = wsi;
diff --git a/src/vulkan/wsi/wsi_common_private.h b/src/vulkan/wsi/wsi_common_private.h
index a6f49fc3124..6d8f4b7a0e4 100644
--- a/src/vulkan/wsi/wsi_common_private.h
+++ b/src/vulkan/wsi/wsi_common_private.h
@@ -79,6 +79,10 @@ wsi_swapchain_init(const struct wsi_device *wsi,
                     const VkSwapchainCreateInfoKHR *pCreateInfo,
                     const VkAllocationCallbacks *pAllocator);
  +enum VkPresentModeKHR
+wsi_swapchain_get_present_mode(struct wsi_device *wsi,
+                               const VkSwapchainCreateInfoKHR *pCreateInfo);
+
  void wsi_swapchain_finish(struct wsi_swapchain *chain);
    VkResult
diff --git a/src/vulkan/wsi/wsi_common_wayland.c b/src/vulkan/wsi/wsi_common_wayland.c
index 03a47028ef2..ad653848b82 100644
--- a/src/vulkan/wsi/wsi_common_wayland.c
+++ b/src/vulkan/wsi/wsi_common_wayland.c
@@ -1009,7 +1009,7 @@ wsi_wl_surface_create_swapchain(VkIcdSurfaceBase *icd_surface,
     chain->base.get_wsi_image = wsi_wl_swapchain_get_wsi_image;
     chain->base.acquire_next_image = wsi_wl_swapchain_acquire_next_image;
     chain->base.queue_present = wsi_wl_swapchain_queue_present;
-   chain->base.present_mode = pCreateInfo->presentMode;
+   chain->base.present_mode = wsi_swapchain_get_present_mode(wsi_device, pCreateInfo);
     chain->base.image_count = num_images;
     chain->extent = pCreateInfo->imageExtent;
     chain->vk_format = pCreateInfo->imageFormat;
diff --git a/src/vulkan/wsi/wsi_common_x11.c b/src/vulkan/wsi/wsi_common_x11.c
index c87b9312636..1782aa525bc 100644
--- a/src/vulkan/wsi/wsi_common_x11.c
+++ b/src/vulkan/wsi/wsi_common_x11.c
@@ -1361,7 +1361,7 @@ x11_surface_create_swapchain(VkIcdSurfaceBase *icd_surface,
     chain->base.get_wsi_image = x11_get_wsi_image;
     chain->base.acquire_next_image = x11_acquire_next_image;
     chain->base.queue_present = x11_queue_present;
-   chain->base.present_mode = pCreateInfo->presentMode;
+   chain->base.present_mode = wsi_swapchain_get_present_mode(wsi_device, pCreateInfo);
     chain->base.image_count = num_images;
     chain->conn = conn;
     chain->window = window;


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