1 files changed, 312 insertions, 0 deletions
diff --git a/src/gallium/state_trackers/wgl/stw_st.c b/src/gallium/state_trackers/wgl/stw_st.c
new file mode 100644
index 0000000000..f4ea61ed2c
--- /dev/null
+++ b/src/gallium/state_trackers/wgl/stw_st.c
@@ -0,0 +1,312 @@
+/*
+ * Mesa 3-D graphics library
+ * Version:  7.9
+ *
+ * Copyright (C) 2010 LunarG Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Chia-I Wu <olv@lunarg.com>
+ */
+
+#include "util/u_memory.h"
+#include "util/u_inlines.h"
+#include "state_tracker/st_manager.h" /* for st_manager_create_api */
+
+#include "stw_st.h"
+#include "stw_device.h"
+#include "stw_framebuffer.h"
+#include "stw_pixelformat.h"
+
+struct stw_st_framebuffer {
+   struct st_framebuffer_iface base;
+
+   struct stw_framebuffer *fb;
+   struct st_visual stvis;
+
+   struct pipe_resource *textures[ST_ATTACHMENT_COUNT];
+   unsigned texture_width, texture_height;
+   unsigned texture_mask;
+
+   struct pipe_surface *front_surface, *back_surface;
+};
+
+static INLINE struct stw_st_framebuffer *
+stw_st_framebuffer(struct st_framebuffer_iface *stfb)
+{
+   return (struct stw_st_framebuffer *) stfb;
+}
+
+/**
+ * Remove outdated textures and create the requested ones.
+ */
+static void
+stw_st_framebuffer_validate_locked(struct st_framebuffer_iface *stfb,
+                                   unsigned width, unsigned height,
+                                   unsigned mask)
+{
+   struct stw_st_framebuffer *stwfb = stw_st_framebuffer(stfb);
+   struct pipe_resource templ;
+   unsigned i;
+
+   /* remove outdated surface */
+   pipe_surface_reference(&stwfb->front_surface, NULL);
+   pipe_surface_reference(&stwfb->back_surface, NULL);
+
+   /* remove outdated textures */
+   if (stwfb->texture_width != width || stwfb->texture_height != height) {
+      for (i = 0; i < ST_ATTACHMENT_COUNT; i++)
+         pipe_resource_reference(&stwfb->textures[i], NULL);
+   }
+
+   memset(&templ, 0, sizeof(templ));
+   templ.target = PIPE_TEXTURE_2D;
+   templ.width0 = width;
+   templ.height0 = height;
+   templ.depth0 = 1;
+   templ.last_level = 0;
+
+   for (i = 0; i < ST_ATTACHMENT_COUNT; i++) {
+      enum pipe_format format;
+      unsigned bind;
+
+      /* the texture already exists or not requested */
+      if (stwfb->textures[i] || !(mask & (1 << i))) {
+         /* remember the texture */
+         if (stwfb->textures[i])
+            mask |= (1 << i);
+         continue;
+      }
+
+      switch (i) {
+      case ST_ATTACHMENT_FRONT_LEFT:
+      case ST_ATTACHMENT_BACK_LEFT:
+         format = stwfb->stvis.color_format;
+         bind = PIPE_BIND_DISPLAY_TARGET |
+                PIPE_BIND_RENDER_TARGET;
+         break;
+      case ST_ATTACHMENT_DEPTH_STENCIL:
+         format = stwfb->stvis.depth_stencil_format;
+         bind = PIPE_BIND_DEPTH_STENCIL;
+         break;
+      default:
+         format = PIPE_FORMAT_NONE;
+         break;
+      }
+
+      if (format != PIPE_FORMAT_NONE) {
+         templ.format = format;
+         templ.bind = bind;
+
+         stwfb->textures[i] =
+            stw_dev->screen->resource_create(stw_dev->screen, &templ);
+      }
+   }
+
+   stwfb->texture_width = width;
+   stwfb->texture_height = height;
+   stwfb->texture_mask = mask;
+}
+
+static boolean 
+stw_st_framebuffer_validate(struct st_framebuffer_iface *stfb,
+                            const enum st_attachment_type *statts,
+                            unsigned count,
+                            struct pipe_resource **out)
+{
+   struct stw_st_framebuffer *stwfb = stw_st_framebuffer(stfb);
+   unsigned statt_mask, i;
+
+   statt_mask = 0x0;
+   for (i = 0; i < count; i++)
+      statt_mask |= 1 << statts[i];
+
+   pipe_mutex_lock(stwfb->fb->mutex);
+
+   if (stwfb->fb->must_resize || (statt_mask & ~stwfb->texture_mask)) {
+      stw_st_framebuffer_validate_locked(&stwfb->base,
+            stwfb->fb->width, stwfb->fb->height, statt_mask);
+      stwfb->fb->must_resize = FALSE;
+   }
+
+   for (i = 0; i < count; i++) {
+      out[i] = NULL;
+      pipe_resource_reference(&out[i], stwfb->textures[statts[i]]);
+   }
+
+   stw_framebuffer_release(stwfb->fb);
+
+   return TRUE;
+}
+
+static struct pipe_surface *
+get_present_surface_locked(struct st_framebuffer_iface *stfb,
+                           enum st_attachment_type statt)
+{
+   struct stw_st_framebuffer *stwfb = stw_st_framebuffer(stfb);
+   struct pipe_resource *ptex;
+   struct pipe_surface *psurf, **cache;
+   
+   ptex = stwfb->textures[statt];
+   if (!ptex)
+      return NULL;
+
+   psurf = NULL;
+
+   switch (statt) {
+   case ST_ATTACHMENT_FRONT_LEFT:
+      cache = &stwfb->front_surface;
+      break;
+   case ST_ATTACHMENT_BACK_LEFT:
+      cache = &stwfb->back_surface;
+      break;
+   default:
+      cache = &psurf;
+      break;
+   }
+
+   if (!*cache) {
+      *cache = stw_dev->screen->get_tex_surface(stw_dev->screen,
+            ptex, 0, 0, 0,
+            PIPE_BIND_DISPLAY_TARGET |
+            PIPE_BIND_RENDER_TARGET);
+   }
+
+   if (psurf != *cache)
+      pipe_surface_reference(&psurf, *cache);
+
+   return psurf;
+}
+
+/**
+ * Present an attachment of the framebuffer.
+ */
+static boolean
+stw_st_framebuffer_present_locked(struct st_framebuffer_iface *stfb,
+                                  enum st_attachment_type statt)
+{
+   struct stw_st_framebuffer *stwfb = stw_st_framebuffer(stfb);
+   struct pipe_surface *psurf;
+   
+   psurf = get_present_surface_locked(&stwfb->base, statt);
+   if (psurf) {
+      stw_framebuffer_present_locked(stwfb->fb->hDC, stwfb->fb, psurf);
+      pipe_surface_reference(&psurf, NULL);
+   }
+
+   return TRUE;
+}
+
+static boolean
+stw_st_framebuffer_flush_front(struct st_framebuffer_iface *stfb,
+                               enum st_attachment_type statt)
+{
+   struct stw_st_framebuffer *stwfb = stw_st_framebuffer(stfb);
+
+   pipe_mutex_lock(stwfb->fb->mutex);
+
+   return stw_st_framebuffer_present_locked(&stwfb->base, statt);
+}
+
+/**
+ * Create a framebuffer interface.
+ */
+struct st_framebuffer_iface *
+stw_st_create_framebuffer(struct stw_framebuffer *fb)
+{
+   struct stw_st_framebuffer *stwfb;
+
+   stwfb = CALLOC_STRUCT(stw_st_framebuffer);
+   if (!stwfb)
+      return NULL;
+
+   stwfb->fb = fb;
+   stwfb->stvis = fb->pfi->stvis;
+
+   stwfb->base.visual = &stwfb->stvis;
+   stwfb->base.flush_front = stw_st_framebuffer_flush_front;
+   stwfb->base.validate = stw_st_framebuffer_validate;
+
+   return &stwfb->base;
+}
+
+/**
+ * Destroy a framebuffer interface.
+ */
+void
+stw_st_destroy_framebuffer_locked(struct st_framebuffer_iface *stfb)
+{
+   struct stw_st_framebuffer *stwfb = stw_st_framebuffer(stfb);
+   int i;
+
+   pipe_surface_reference(&stwfb->front_surface, NULL);
+   pipe_surface_reference(&stwfb->back_surface, NULL);
+
+   for (i = 0; i < ST_ATTACHMENT_COUNT; i++)
+      pipe_resource_reference(&stwfb->textures[i], NULL);
+
+   FREE(stwfb);
+}
+
+/**
+ * Swap the buffers of the given framebuffer.
+ */
+boolean
+stw_st_swap_framebuffer_locked(struct st_framebuffer_iface *stfb)
+{
+   struct stw_st_framebuffer *stwfb = stw_st_framebuffer(stfb);
+   unsigned front = ST_ATTACHMENT_FRONT_LEFT, back = ST_ATTACHMENT_BACK_LEFT;
+   struct pipe_resource *ptex;
+   struct pipe_surface *psurf;
+   unsigned mask;
+
+   /* swap the textures */
+   ptex = stwfb->textures[front];
+   stwfb->textures[front] = stwfb->textures[back];
+   stwfb->textures[back] = ptex;
+
+   /* swap the surfaces */
+   psurf = stwfb->front_surface;
+   stwfb->front_surface = stwfb->back_surface;
+   stwfb->back_surface = psurf;
+
+   /* convert to mask */
+   front = 1 << front;
+   back = 1 << back;
+
+   /* swap the bits in mask */
+   mask = stwfb->texture_mask & ~(front | back);
+   if (stwfb->texture_mask & front)
+      mask |= back;
+   if (stwfb->texture_mask & back)
+      mask |= front;
+   stwfb->texture_mask = mask;
+
+   front = ST_ATTACHMENT_FRONT_LEFT;
+   return stw_st_framebuffer_present_locked(&stwfb->base, front);
+}
+
+/**
+ * Create an st_api of the state tracker.
+ */
+struct st_api *
+stw_st_create_api(void)
+{
+   return st_manager_create_api();
+}