Vulkan: Add adaptive vsync support

libretro · Feb 21, 2025 · f2ddb23 · f2ddb23
1 parent 9005e1b
commit f2ddb23
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Showing 4 changed files with 45 additions and 8 deletions.
diff --git a/gfx/common/vulkan_common.c b/gfx/common/vulkan_common.c
@@ -1533,7 +1533,7 @@ bool vulkan_surface_create(gfx_ctx_vulkan_data_t *vk,
       enum vulkan_wsi_type type,
       void *display, void *surface,
       unsigned width, unsigned height,
-      unsigned swap_interval)
+      int8_t swap_interval)
 {
    switch (type)
    {
@@ -1914,7 +1914,7 @@ bool vulkan_is_hdr10_format(VkFormat format)
 
 bool vulkan_create_swapchain(gfx_ctx_vulkan_data_t *vk,
       unsigned width, unsigned height,
-      unsigned swap_interval)
+      int8_t swap_interval)
 {
    unsigned i;
    uint32_t format_count;
@@ -2028,6 +2028,9 @@ bool vulkan_create_swapchain(gfx_ctx_vulkan_data_t *vk,
 
    vk->context.swap_interval = swap_interval;
 
+   for (i = 0; i < present_mode_count; i++)
+      vk->context.present_modes[i] = present_modes[i];
+
    /* Prefer IMMEDIATE without vsync */
    for (i = 0; i < present_mode_count; i++)
    {
@@ -2038,6 +2041,13 @@ bool vulkan_create_swapchain(gfx_ctx_vulkan_data_t *vk,
          swapchain_present_mode = VK_PRESENT_MODE_IMMEDIATE_KHR;
          break;
       }
+
+      if (     swap_interval < 0
+            && present_modes[i] == VK_PRESENT_MODE_FIFO_RELAXED_KHR)
+      {
+         swapchain_present_mode = VK_PRESENT_MODE_FIFO_RELAXED_KHR;
+         break;
+      }
    }
 
    /* If still in FIFO with no swap interval, try MAILBOX */

diff --git a/gfx/common/vulkan_common.h b/gfx/common/vulkan_common.h
@@ -363,6 +363,7 @@ typedef struct vulkan_context
    VkPhysicalDeviceProperties gpu_properties;
    VkPhysicalDeviceMemoryProperties memory_properties;
 
+   VkPresentModeKHR present_modes[16];
    VkImage swapchain_images[VULKAN_MAX_SWAPCHAIN_IMAGES];
    VkFence swapchain_fences[VULKAN_MAX_SWAPCHAIN_IMAGES];
    VkFormat swapchain_format;
@@ -385,9 +386,9 @@ typedef struct vulkan_context
 
    unsigned swapchain_width;
    unsigned swapchain_height;
-   unsigned swap_interval;
    unsigned num_recycled_acquire_semaphores;
 
+   int8_t swap_interval;
    uint8_t flags;
 
    bool swapchain_fences_signalled[VULKAN_MAX_SWAPCHAIN_IMAGES];
@@ -723,15 +724,15 @@ bool vulkan_surface_create(gfx_ctx_vulkan_data_t *vk,
       enum vulkan_wsi_type type,
       void *display, void *surface,
       unsigned width, unsigned height,
-      unsigned swap_interval);
+      int8_t swap_interval);
 
 void vulkan_present(gfx_ctx_vulkan_data_t *vk, unsigned index);
 
 void vulkan_acquire_next_image(gfx_ctx_vulkan_data_t *vk);
 
 bool vulkan_create_swapchain(gfx_ctx_vulkan_data_t *vk,
       unsigned width, unsigned height,
-      unsigned swap_interval);
+      int8_t swap_interval);
 
 void vulkan_debug_mark_image(VkDevice device, VkImage image);
 void vulkan_debug_mark_memory(VkDevice device, VkDeviceMemory memory);

diff --git a/gfx/drivers_context/w_vk_ctx.c b/gfx/drivers_context/w_vk_ctx.c
@@ -271,10 +271,24 @@ static void *gfx_ctx_w_vk_get_context_data(void *data) { return &win32_vk.contex
 
 static uint32_t gfx_ctx_w_vk_get_flags(void *data)
 {
-   uint32_t flags = 0;
+   uint32_t flags             = 0;
+   uint8_t present_mode_count = 16;
+   uint8_t i                  = 0;
+
+   /* Check for FIFO_RELAXED_KHR capability */
+   for (i = 0; i < present_mode_count; i++)
+   {
+      if (win32_vk.context.present_modes[i] == VK_PRESENT_MODE_FIFO_RELAXED_KHR)
+      {
+         BIT32_SET(flags, GFX_CTX_FLAGS_ADAPTIVE_VSYNC);
+         break;
+      }
+   }
+
 #if defined(HAVE_SLANG) && defined(HAVE_SPIRV_CROSS)
    BIT32_SET(flags, GFX_CTX_FLAGS_SHADERS_SLANG);
 #endif
+
    return flags;
 }
 

diff --git a/gfx/drivers_context/x_vk_ctx.c b/gfx/drivers_context/x_vk_ctx.c
@@ -526,8 +526,20 @@ static void *gfx_ctx_x_vk_get_context_data(void *data)
 
 static uint32_t gfx_ctx_x_vk_get_flags(void *data)
 {
-   uint32_t         flags = 0;
-   gfx_ctx_x_vk_data_t *x = (gfx_ctx_x_vk_data_t*)data;
+   gfx_ctx_x_vk_data_t *x     = (gfx_ctx_x_vk_data_t*)data;
+   uint32_t flags             = 0;
+   uint8_t present_mode_count = 16;
+   uint8_t i                  = 0;
+
+   /* Check for FIFO_RELAXED_KHR capability */
+   for (i = 0; i < present_mode_count; i++)
+   {
+      if (x->vk.context.present_modes[i] == VK_PRESENT_MODE_FIFO_RELAXED_KHR)
+      {
+         BIT32_SET(flags, GFX_CTX_FLAGS_ADAPTIVE_VSYNC);
+         break;
+      }
+   }
 
 #if defined(HAVE_SLANG) && defined(HAVE_SPIRV_CROSS)
    BIT32_SET(flags, GFX_CTX_FLAGS_SHADERS_SLANG);