wgl: Use winsys framebuffer interface if present

Reviewed-by: Charmaine Lee <charmainel@vmware.com>
Reviewed-by: Erik Faye-Lund <erik.faye-lund@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7535>

src/gallium/frontends/wgl/stw_framebuffer.c

@@ -28,6 +28,7 @@
 #include <windows.h>
 
 #include "pipe/p_screen.h"
+#include "pipe/p_state.h"
 #include "util/u_memory.h"
 #include "hud/hud_context.h"
 #include "util/os_time.h"
@@ -100,6 +101,9 @@ stw_framebuffer_release_locked(struct stw_framebuffer *fb)
       stw_dev->stw_winsys->shared_surface_close(stw_dev->screen,
                                                 fb->shared_surface);
 
+   if (fb->winsys_framebuffer)
+      fb->winsys_framebuffer->destroy(fb->winsys_framebuffer);
+
    stw_st_destroy_framebuffer_locked(fb->stfb);
 
    stw_framebuffer_unlock(fb);
@@ -268,6 +272,10 @@ stw_framebuffer_create(HDC hdc, int iPixelFormat)
    fb->hWnd = hWnd;
    fb->iPixelFormat = iPixelFormat;
 
+   if (stw_dev->stw_winsys->create_framebuffer)
+      fb->winsys_framebuffer =
+         stw_dev->stw_winsys->create_framebuffer(stw_dev->screen, hdc, iPixelFormat);
+
    /*
     * We often need a displayable pixel format to make GDI happy. Set it
     * here (always 1, i.e., out first pixel format) where appropriate.
@@ -552,8 +560,17 @@ stw_framebuffer_present_locked(HDC hdc,
                                struct stw_framebuffer *fb,
                                struct pipe_resource *res)
 {
-   if (stw_dev->callbacks.pfnPresentBuffers &&
-      stw_dev->stw_winsys->compose) {
+   if (fb->winsys_framebuffer) {
+      BOOL result = fb->winsys_framebuffer->present(fb->winsys_framebuffer);
+
+      stw_framebuffer_update(fb);
+      stw_notify_current_locked(fb);
+      stw_framebuffer_unlock(fb);
+
+      return result;
+   }
+   else if (stw_dev->callbacks.pfnPresentBuffers &&
+            stw_dev->stw_winsys->compose) {
       PRESENTBUFFERSCB data;
 
       memset(&data, 0, sizeof data);
@@ -652,7 +669,7 @@ DrvSwapBuffers(HDC hdc)
       }
    }
 
-   if (stw_dev->swap_interval != 0) {
+   if (stw_dev->swap_interval != 0 && !fb->winsys_framebuffer) {
       wait_swap_interval(fb);
    }
 

src/gallium/frontends/wgl/stw_framebuffer.h

@@ -108,6 +108,8 @@ struct stw_framebuffer
    HANDLE hSharedSurface;
    struct stw_shared_surface *shared_surface;
 
+   struct stw_winsys_framebuffer *winsys_framebuffer;
+
    /* For WGL_EXT_swap_control */
    int64_t prev_swap_time;
 

src/gallium/frontends/wgl/stw_st.c

@@ -29,11 +29,13 @@
 #include "util/u_inlines.h"
 #include "util/u_atomic.h"
 #include "state_tracker/st_gl_api.h" /* for st_gl_api_create */
+#include "pipe/p_state.h"
 
 #include "stw_st.h"
 #include "stw_device.h"
 #include "stw_framebuffer.h"
 #include "stw_pixelformat.h"
+#include "stw_winsys.h"
 
 struct stw_st_framebuffer {
    struct st_framebuffer_iface base;
@@ -74,7 +76,8 @@ stw_own_mutex(const CRITICAL_SECTION *cs)
  * Remove outdated textures and create the requested ones.
  */
 static void
-stw_st_framebuffer_validate_locked(struct st_framebuffer_iface *stfb,
+stw_st_framebuffer_validate_locked(struct st_context_iface *stctx,
+                                   struct st_framebuffer_iface *stfb,
                                    unsigned width, unsigned height,
                                    unsigned mask)
 {
@@ -82,14 +85,6 @@ stw_st_framebuffer_validate_locked(struct st_framebuffer_iface *stfb,
    struct pipe_resource templ;
    unsigned i;
 
-   /* remove outdated textures */
-   if (stwfb->texture_width != width || stwfb->texture_height != height) {
-      for (i = 0; i < ST_ATTACHMENT_COUNT; i++) {
-         pipe_resource_reference(&stwfb->msaa_textures[i], NULL);
-         pipe_resource_reference(&stwfb->textures[i], NULL);
-      }
-   }
-
    memset(&templ, 0, sizeof(templ));
    templ.target = PIPE_TEXTURE_2D;
    templ.width0 = width;
@@ -98,6 +93,20 @@ stw_st_framebuffer_validate_locked(struct st_framebuffer_iface *stfb,
    templ.array_size = 1;
    templ.last_level = 0;
 
+   /* remove outdated textures */
+   if (stwfb->texture_width != width || stwfb->texture_height != height) {
+      for (i = 0; i < ST_ATTACHMENT_COUNT; i++) {
+         pipe_resource_reference(&stwfb->msaa_textures[i], NULL);
+         pipe_resource_reference(&stwfb->textures[i], NULL);
+      }
+
+      if (stwfb->fb->winsys_framebuffer) {
+         templ.nr_samples = templ.nr_storage_samples = 1;
+         templ.format = stwfb->stvis.color_format;
+         stwfb->fb->winsys_framebuffer->resize(stwfb->fb->winsys_framebuffer, stctx->pipe, &templ);
+      }
+   }
+
    for (i = 0; i < ST_ATTACHMENT_COUNT; i++) {
       enum pipe_format format;
       unsigned bind;
@@ -141,8 +150,12 @@ stw_st_framebuffer_validate_locked(struct st_framebuffer_iface *stfb,
 
          templ.bind = bind;
          templ.nr_samples = templ.nr_storage_samples = 1;
-         stwfb->textures[i] =
-            stw_dev->screen->resource_create(stw_dev->screen, &templ);
+         if (stwfb->fb->winsys_framebuffer)
+            stwfb->textures[i] = stwfb->fb->winsys_framebuffer->get_resource(
+               stwfb->fb->winsys_framebuffer, i);
+         else
+            stwfb->textures[i] =
+               stw_dev->screen->resource_create(stw_dev->screen, &templ);
       }
    }
 
@@ -168,7 +181,7 @@ stw_st_framebuffer_validate(struct st_context_iface *stctx,
    stw_framebuffer_lock(stwfb->fb);
 
    if (stwfb->fb->must_resize || (statt_mask & ~stwfb->texture_mask)) {
-      stw_st_framebuffer_validate_locked(&stwfb->base,
+      stw_st_framebuffer_validate_locked(stctx, &stwfb->base,
             stwfb->fb->width, stwfb->fb->height, statt_mask);
       stwfb->fb->must_resize = FALSE;
    }