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Search for an appropiate plane instead of simply using the first one.

This commit is contained in:
Vanfanel 2021-08-25 19:31:47 +02:00 committed by Sam Lantinga
parent 23ffa3d914
commit b1e492d1fc
1 changed files with 106 additions and 40 deletions
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146
src/video/kmsdrm/SDL_kmsdrmvulkan.c
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@ -187,29 +187,35 @@ SDL_bool KMSDRM_Vulkan_CreateSurface(_THIS,
uint32_t display_count;
uint32_t mode_count;
uint32_t plane_count;
uint32_t plane = UINT32_MAX;
VkPhysicalDevice *physical_devices = NULL;
VkPhysicalDeviceProperties *device_props = NULL;
VkDisplayPropertiesKHR *displays_props = NULL;
VkDisplayModePropertiesKHR *modes_props = NULL;
VkDisplayPlanePropertiesKHR *planes_props = NULL;
VkDisplayPropertiesKHR *display_props = NULL;
VkDisplayModePropertiesKHR *mode_props = NULL;
VkDisplayPlanePropertiesKHR *plane_props = NULL;
VkDisplayPlaneCapabilitiesKHR plane_caps;
VkDisplayModeCreateInfoKHR display_mode_create_info;
VkDisplaySurfaceCreateInfoKHR display_plane_surface_create_info;
VkExtent2D image_size;
VkDisplayKHR display;
VkDisplayModeKHR display_mode = (VkDisplayModeKHR)0;
VkDisplayModePropertiesKHR display_mode_props = {0};
VkDisplayModeParametersKHR new_mode_parameters = { {0, 0}, 0};
/* Prefer a plane that supports per-pixel alpha. */
VkDisplayPlaneAlphaFlagBitsKHR alpha_mode = VK_DISPLAY_PLANE_ALPHA_OPAQUE_BIT_KHR;
VkResult result;
SDL_bool ret = SDL_FALSE;
SDL_bool valid_gpu = SDL_FALSE;
SDL_bool mode_found = SDL_FALSE;
SDL_bool plane_supports_display = SDL_FALSE;
/* Get the display index from the display being used by the window. */
int display_index = SDL_atoi(SDL_GetDisplayForWindow(window)->name);
int i;
int i, j;
/* Get the function pointers for the functions we will use. */
PFN_vkGetInstanceProcAddr vkGetInstanceProcAddr =
@ -239,14 +245,13 @@ SDL_bool KMSDRM_Vulkan_CreateSurface(_THIS,
(PFN_vkGetPhysicalDeviceDisplayPlanePropertiesKHR)vkGetInstanceProcAddr(
instance, "vkGetPhysicalDeviceDisplayPlanePropertiesKHR");
/*PFN_vkGetDisplayPlaneSupportedDisplaysKHR vkGetDisplayPlaneSupportedDisplaysKHR =
PFN_vkGetDisplayPlaneSupportedDisplaysKHR vkGetDisplayPlaneSupportedDisplaysKHR =
(PFN_vkGetDisplayPlaneSupportedDisplaysKHR)vkGetInstanceProcAddr(
instance, "vkGetDisplayPlaneSupportedDisplaysKHR");
PFN_vkGetDisplayPlaneCapabilitiesKHR vkGetDisplayPlaneCapabilitiesKHR =
(PFN_vkGetDisplayPlaneCapabilitiesKHR)vkGetInstanceProcAddr(
instance, "vkGetDisplayPlaneCapabilitiesKHR");
*/
PFN_vkCreateDisplayModeKHR vkCreateDisplayModeKHR =
(PFN_vkCreateDisplayModeKHR)vkGetInstanceProcAddr(
@ -329,38 +334,29 @@ SDL_bool KMSDRM_Vulkan_CreateSurface(_THIS,
}
/* Get the props of the displays of the physical device. */
displays_props = (VkDisplayPropertiesKHR *) SDL_malloc(display_count * sizeof(*displays_props));
display_props = (VkDisplayPropertiesKHR *) SDL_malloc(display_count * sizeof(*display_props));
vkGetPhysicalDeviceDisplayPropertiesKHR(gpu,
&display_count,
displays_props);
display_props);
/* Get the videomode count for the first display. */
/* Get the chosen display based on the display index. */
display = display_props[display_index].display;
/* Get the list of the display videomodes. */
vkGetDisplayModePropertiesKHR(gpu,
displays_props[display_index].display,
display,
&mode_count, NULL);
if (mode_count == 0) {
SDL_SetError("Vulkan can't find any video modes for display %i (%s)\n", 0,
displays_props[display_index].displayName);
display_props[display_index].displayName);
goto clean;
}
/* Get the props of the videomodes for the display. */
modes_props = (VkDisplayModePropertiesKHR *) SDL_malloc(mode_count * sizeof(*modes_props));
mode_props = (VkDisplayModePropertiesKHR *) SDL_malloc(mode_count * sizeof(*mode_props));
vkGetDisplayModePropertiesKHR(gpu,
displays_props[display_index].display,
&mode_count, modes_props);
/* Get the planes count of the physical device. */
vkGetPhysicalDeviceDisplayPlanePropertiesKHR(gpu, &plane_count, NULL);
if (plane_count == 0) {
SDL_SetError("Vulkan can't find any planes.");
goto clean;
}
/* Get the props of the planes for the physical device. */
planes_props = SDL_malloc(sizeof(VkDisplayPlanePropertiesKHR) * plane_count);
vkGetPhysicalDeviceDisplayPlanePropertiesKHR(gpu, &plane_count, planes_props);
display,
&mode_count, mode_props);
/* Get a video mode equal to the window size among the predefined ones,
if possible.
@ -369,10 +365,10 @@ SDL_bool KMSDRM_Vulkan_CreateSurface(_THIS,
scanout a region bigger than the window (we would be reading past the
buffer, and Vulkan would give us a confusing VK_ERROR_SURFACE_LOST_KHR). */
for (i = 0; i < mode_count; i++) {
if (modes_props[i].parameters.visibleRegion.width == window->w &&
modes_props[i].parameters.visibleRegion.height == window->h)
if (mode_props[i].parameters.visibleRegion.width == window->w &&
mode_props[i].parameters.visibleRegion.height == window->h)
{
display_mode_props = modes_props[i];
display_mode_props = mode_props[i];
mode_found = SDL_TRUE;
break;
}
@ -399,7 +395,7 @@ SDL_bool KMSDRM_Vulkan_CreateSurface(_THIS,
display_mode_create_info.sType = VK_STRUCTURE_TYPE_DISPLAY_MODE_CREATE_INFO_KHR;
display_mode_create_info.parameters = new_mode_parameters;
result = vkCreateDisplayModeKHR(gpu,
displays_props[display_index].display,
display,
&display_mode_create_info,
NULL, &display_mode);
if (result != VK_SUCCESS) {
@ -414,6 +410,77 @@ SDL_bool KMSDRM_Vulkan_CreateSurface(_THIS,
goto clean;
}
/* Get the list of the physical device planes. */
vkGetPhysicalDeviceDisplayPlanePropertiesKHR(gpu, &plane_count, NULL);
if (plane_count == 0) {
SDL_SetError("Vulkan can't find any planes.");
goto clean;
}
plane_props = SDL_malloc(sizeof(VkDisplayPlanePropertiesKHR) * plane_count);
vkGetPhysicalDeviceDisplayPlanePropertiesKHR(gpu, &plane_count, plane_props);
/* Iterate on the list of planes of the physical device
to find a plane that matches these criteria:
-It must be compatible with the chosen display + mode.
-It isn't currently bound to another display.
-It supports per-pixel alpha, if possible. */
for (i = 0; i < plane_count; i++) {
uint32_t supported_displays_count = 0;
VkDisplayKHR* supported_displays;
/* See if the plane is compatible with the current display. */
vkGetDisplayPlaneSupportedDisplaysKHR(gpu, i, &supported_displays_count, NULL);
if (supported_displays_count == 0) {
/* This plane doesn't support any displays. Continue to the next plane. */
continue;
}
/* Get the list of displays supported by this plane. */
supported_displays = (VkDisplayKHR*)malloc(sizeof(VkDisplayKHR) * supported_displays_count);
vkGetDisplayPlaneSupportedDisplaysKHR(gpu, i,
&supported_displays_count, supported_displays);
/* The plane must be bound to the chosen display, or not in use.
If none of these is true, iterate to another plane. */
if (!((plane_props[i].currentDisplay == display) ||
(plane_props[i].currentDisplay == VK_NULL_HANDLE)))
continue;
/* Iterate the list of displays supported by this plane
in order to find out if the chosen display is among them. */
plane_supports_display = SDL_FALSE;
for (j = 0; j < supported_displays_count; j++) {
if (supported_displays[j] == display) {
plane_supports_display = SDL_TRUE;
break;
}
}
/* Free the list of displays supported by this plane. */
if (supported_displays)
free(supported_displays);
/* If the display is not supported by this plane, iterate to the next plane. */
if (!plane_supports_display) {
continue;
}
/* Want a plane that supports the alpha mode we have chosen. */
vkGetDisplayPlaneCapabilitiesKHR(gpu, display_mode, i, &plane_caps);
if (plane_caps.supportedAlpha == alpha_mode) {
/* Yep, this plane is alright. */
plane = i;
break;
}
}
/* If we couldn't find an appropiate plane, error out. */
if (plane == UINT32_MAX) {
SDL_SetError("Vulkan couldn't find an appropiate plane.");
goto clean;
}
/********************************************/
/* Let's finally create the Vulkan surface! */
/********************************************/
@ -424,11 +491,10 @@ SDL_bool KMSDRM_Vulkan_CreateSurface(_THIS,
SDL_zero(display_plane_surface_create_info);
display_plane_surface_create_info.sType = VK_STRUCTURE_TYPE_DISPLAY_SURFACE_CREATE_INFO_KHR;
display_plane_surface_create_info.displayMode = display_mode;
/* For now, simply use the first plane. */
display_plane_surface_create_info.planeIndex = 0;
display_plane_surface_create_info.planeIndex = plane;
display_plane_surface_create_info.imageExtent = image_size;
display_plane_surface_create_info.transform = VK_SURFACE_TRANSFORM_IDENTITY_BIT_KHR;
display_plane_surface_create_info.alphaMode = VK_DISPLAY_PLANE_ALPHA_OPAQUE_BIT_KHR;
display_plane_surface_create_info.alphaMode = alpha_mode;
result = vkCreateDisplayPlaneSurfaceKHR(instance,
&display_plane_surface_create_info,
NULL,
@ -445,14 +511,14 @@ SDL_bool KMSDRM_Vulkan_CreateSurface(_THIS,
clean:
if (physical_devices)
SDL_free (physical_devices);
if (displays_props)
SDL_free (displays_props);
if (display_props)
SDL_free (display_props);
if (device_props)
SDL_free (device_props);
if (planes_props)
SDL_free (planes_props);
if (modes_props)
SDL_free (modes_props);
if (plane_props)
SDL_free (plane_props);
if (mode_props)
SDL_free (mode_props);
return ret;
}