st/dri: Implement st_api.h callbacks.

This commit adds dri_st_api.c that implements st_api.h callbacks.  A
following commit will switch st/dri from st_public.h to st_api.h.

5 files changed, 505 insertions, 0 deletions

diff --git a/src/gallium/state_trackers/dri/Makefile b/src/gallium/state_trackers/dri/Makefile
index 24244417b97..f5af8aa3a67 100644
--- a/src/gallium/state_trackers/dri/Makefile
+++ b/src/gallium/state_trackers/dri/Makefile
@@ -16,6 +16,7 @@ C_SOURCES = \
 	dri_screen.c \
 	dri_drawable.c \
 	dri_extensions.c \
+	dri_st_api.c \
 	dri1.c
 
 #	$(TOP)/src/mesa/drivers/dri/common/utils.c \
diff --git a/src/gallium/state_trackers/dri/SConscript b/src/gallium/state_trackers/dri/SConscript
index 6310fe06e43..7c67ceecd80 100644
--- a/src/gallium/state_trackers/dri/SConscript
+++ b/src/gallium/state_trackers/dri/SConscript
@@ -18,6 +18,7 @@ if env['dri']:
 		'dri_drawable.c',
 		'dri_extensions.c',
 		'dri_screen.c',
+		'dri_st_api.c',
 		'dri1.c',
 		]
     )
diff --git a/src/gallium/state_trackers/dri/dri_drawable.h b/src/gallium/state_trackers/dri/dri_drawable.h
index 48d24e959c0..ea66c483a1e 100644
--- a/src/gallium/state_trackers/dri/dri_drawable.h
+++ b/src/gallium/state_trackers/dri/dri_drawable.h
@@ -30,6 +30,7 @@
 
 #include "pipe/p_compiler.h"
 #include "pipe/p_format.h"
+#include "state_tracker/st_api.h"
 
 struct pipe_surface;
 struct pipe_fence_handle;
@@ -57,6 +58,11 @@ struct dri_drawable
 
    /* gallium */
    struct st_framebuffer *stfb;
+   struct st_visual stvis;
+
+   struct pipe_texture *textures[ST_ATTACHMENT_COUNT];
+   unsigned int texture_mask, texture_stamp;
+
    struct pipe_fence_handle *swap_fences[DRI_SWAP_FENCES_MAX];
    unsigned int head;
    unsigned int tail;
diff --git a/src/gallium/state_trackers/dri/dri_st_api.c b/src/gallium/state_trackers/dri/dri_st_api.c
new file mode 100644
index 00000000000..379515152e8
--- /dev/null
+++ b/src/gallium/state_trackers/dri/dri_st_api.c
@@ -0,0 +1,442 @@
+/*
+ * 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 <[email protected]>
+ */
+
+#include "util/u_memory.h"
+#include "util/u_inlines.h"
+#include "util/u_format.h"
+#include "util/u_debug.h"
+#include "state_tracker/drm_api.h"
+#include "state_tracker/st_manager.h" /* for st_manager_create_api */
+
+#include "dri_screen.h"
+#include "dri_context.h"
+#include "dri_drawable.h"
+#include "dri_st_api.h"
+#include "dri1.h"
+
+static struct {
+   int32_t refcnt;
+   struct st_api *stapi;
+} dri_st_api;
+
+/**
+ * Get the format of an attachment.
+ */
+static INLINE enum pipe_format
+dri_drawable_get_format(struct dri_drawable *drawable,
+                        enum st_attachment_type statt)
+{
+   enum pipe_format format;
+
+   switch (statt) {
+   case ST_ATTACHMENT_FRONT_LEFT:
+   case ST_ATTACHMENT_BACK_LEFT:
+   case ST_ATTACHMENT_FRONT_RIGHT:
+   case ST_ATTACHMENT_BACK_RIGHT:
+      format = drawable->stvis.color_format;
+      break;
+   case ST_ATTACHMENT_DEPTH_STENCIL:
+      format = drawable->stvis.depth_stencil_format;
+      break;
+   default:
+      format = PIPE_FORMAT_NONE;
+      break;
+   }
+
+   return format;
+}
+
+/**
+ * Process __DRIbuffer and convert them into pipe_textures.
+ */
+static void
+dri_drawable_process_buffers(struct dri_drawable *drawable,
+                             __DRIbuffer *buffers, unsigned count)
+{
+   struct dri_screen *screen = dri_screen(drawable->sPriv);
+   __DRIdrawable *dri_drawable = drawable->dPriv;
+   struct pipe_texture templ;
+   struct winsys_handle whandle;
+   boolean have_depth = FALSE;
+   unsigned i;
+
+   if (drawable->old_num == count &&
+       drawable->old_w == dri_drawable->w &&
+       drawable->old_h == dri_drawable->h &&
+       memcmp(drawable->old, buffers, sizeof(__DRIbuffer) * count) == 0)
+      return;
+
+   for (i = 0; i < ST_ATTACHMENT_COUNT; i++)
+      pipe_texture_reference(&drawable->textures[i], NULL);
+
+   memset(&templ, 0, sizeof(templ));
+   templ.tex_usage = PIPE_TEXTURE_USAGE_RENDER_TARGET;
+   templ.target = PIPE_TEXTURE_2D;
+   templ.last_level = 0;
+   templ.width0 = dri_drawable->w;
+   templ.height0 = dri_drawable->h;
+   templ.depth0 = 1;
+
+   memset(&whandle, 0, sizeof(whandle));
+
+   for (i = 0; i < count; i++) {
+      __DRIbuffer *buf = &buffers[i];
+      enum st_attachment_type statt;
+      enum pipe_format format;
+
+      switch (buf->attachment) {
+      case __DRI_BUFFER_FRONT_LEFT:
+	 if (!screen->auto_fake_front) {
+            statt = ST_ATTACHMENT_INVALID;
+            break;
+         }
+	 /* fallthrough */
+      case __DRI_BUFFER_FAKE_FRONT_LEFT:
+         statt = ST_ATTACHMENT_FRONT_LEFT;
+	 break;
+      case __DRI_BUFFER_BACK_LEFT:
+         statt = ST_ATTACHMENT_BACK_LEFT;
+	 break;
+      case __DRI_BUFFER_DEPTH:
+      case __DRI_BUFFER_DEPTH_STENCIL:
+      case __DRI_BUFFER_STENCIL:
+         statt = ST_ATTACHMENT_DEPTH_STENCIL;
+         /* use only the first depth/stencil buffer */
+         if (have_depth)
+            statt = ST_ATTACHMENT_INVALID;
+         else
+            have_depth = TRUE;
+	 break;
+      default:
+         statt = ST_ATTACHMENT_INVALID;
+         break;
+      }
+
+      format = dri_drawable_get_format(drawable, statt);
+      if (statt == ST_ATTACHMENT_INVALID || format == PIPE_FORMAT_NONE)
+         continue;
+
+      templ.format = format;
+      whandle.handle = buf->name;
+      whandle.stride = buf->pitch;
+   
+      drawable->textures[statt] =
+         screen->pipe_screen->texture_from_handle(screen->pipe_screen,
+               &templ, &whandle);
+   }
+
+   drawable->old_num = count;
+   drawable->old_w = dri_drawable->w;
+   drawable->old_h = dri_drawable->h;
+   memcpy(drawable->old, buffers, sizeof(__DRIbuffer) * count);
+}
+
+/**
+ * Retrieve __DRIbuffer from the DRI loader.
+ */
+static __DRIbuffer *
+dri_drawable_get_buffers(struct dri_drawable *drawable,
+                         const enum st_attachment_type *statts,
+                         unsigned *count)
+{
+   __DRIdrawable *dri_drawable = drawable->dPriv;
+   struct __DRIdri2LoaderExtensionRec *loader = drawable->sPriv->dri2.loader;
+   boolean with_format;
+   __DRIbuffer *buffers;
+   int num_buffers;
+   unsigned attachments[8];
+   unsigned num_attachments, i;
+
+   assert(loader);
+   with_format = (loader->base.version > 2 && loader->getBuffersWithFormat);
+
+   num_attachments = 0;
+   for (i = 0; i < *count; i++) {
+      enum pipe_format format;
+      int att;
+
+      format = dri_drawable_get_format(drawable, statts[i]);
+      if (format == PIPE_FORMAT_NONE)
+         continue;
+
+      switch (statts[i]) {
+      case ST_ATTACHMENT_FRONT_LEFT:
+         att = __DRI_BUFFER_FRONT_LEFT;
+         break;
+      case ST_ATTACHMENT_BACK_LEFT:
+         att = __DRI_BUFFER_BACK_LEFT;
+         break;
+      case ST_ATTACHMENT_FRONT_RIGHT:
+         att = __DRI_BUFFER_FRONT_RIGHT;
+         break;
+      case ST_ATTACHMENT_BACK_RIGHT:
+         att = __DRI_BUFFER_BACK_RIGHT;
+         break;
+      case ST_ATTACHMENT_DEPTH_STENCIL:
+         att = __DRI_BUFFER_DEPTH_STENCIL;
+         break;
+      default:
+         att = -1;
+         break;
+      }
+
+      if (att >= 0) {
+         attachments[num_attachments++] = att;
+         if (with_format) {
+            attachments[num_attachments++] =
+               util_format_get_blocksizebits(format);
+         }
+      }
+   }
+
+   if (with_format) {
+      num_attachments /= 2;
+      buffers = loader->getBuffersWithFormat(dri_drawable,
+            &dri_drawable->w, &dri_drawable->h,
+            attachments, num_attachments,
+            &num_buffers, dri_drawable->loaderPrivate);
+   }
+   else {
+      buffers = loader->getBuffers(dri_drawable,
+            &dri_drawable->w, &dri_drawable->h,
+            attachments, num_attachments,
+            &num_buffers, dri_drawable->loaderPrivate);
+   }
+
+   if (buffers) {
+      /* set one cliprect to cover the whole dri_drawable */
+      dri_drawable->x = 0;
+      dri_drawable->y = 0;
+      dri_drawable->backX = 0;
+      dri_drawable->backY = 0;
+      dri_drawable->numClipRects = 1;
+      dri_drawable->pClipRects[0].x1 = 0;
+      dri_drawable->pClipRects[0].y1 = 0;
+      dri_drawable->pClipRects[0].x2 = dri_drawable->w;
+      dri_drawable->pClipRects[0].y2 = dri_drawable->h;
+      dri_drawable->numBackClipRects = 1;
+      dri_drawable->pBackClipRects[0].x1 = 0;
+      dri_drawable->pBackClipRects[0].y1 = 0;
+      dri_drawable->pBackClipRects[0].x2 = dri_drawable->w;
+      dri_drawable->pBackClipRects[0].y2 = dri_drawable->h;
+
+      *count = num_buffers;
+   }
+
+   return buffers;
+}
+
+static boolean 
+dri_st_framebuffer_validate(struct st_framebuffer_iface *stfbi,
+                            const enum st_attachment_type *statts,
+                            unsigned count,
+                            struct pipe_texture **out)
+{
+   struct dri_drawable *drawable =
+      (struct dri_drawable *) stfbi->st_manager_private;
+   unsigned statt_mask, i;
+
+   statt_mask = 0x0;
+   for (i = 0; i < count; i++)
+      statt_mask |= (1 << statts[i]);
+
+   /*
+    * dPriv->pStamp is the server stamp.  It should be accessed with a lock, at
+    * least for DRI1.  dPriv->lastStamp is the client stamp.  It has the value
+    * of the server stamp when last checked.
+    *
+    * This function updates the textures and records the stamp of the textures.
+    */
+   if (drawable->texture_stamp != drawable->dPriv->lastStamp ||
+       (statt_mask & ~drawable->texture_mask)) {
+      if (__dri1_api_hooks) {
+         /* TODO */
+         return FALSE;
+      }
+      else {
+         __DRIbuffer *buffers;
+         unsigned num_buffers = count;
+
+         buffers = dri_drawable_get_buffers(drawable, statts, &num_buffers);
+         dri_drawable_process_buffers(drawable, buffers, num_buffers);
+      }
+
+      drawable->texture_stamp = drawable->dPriv->lastStamp;
+      drawable->texture_mask = statt_mask;
+   }
+
+   if (!out)
+      return TRUE;
+
+   for (i = 0; i < count; i++) {
+      out[i] = NULL;
+      pipe_texture_reference(&out[i], drawable->textures[statts[i]]);
+   }
+
+   return TRUE;
+}
+
+static boolean
+dri_st_framebuffer_flush_front(struct st_framebuffer_iface *stfbi,
+                               enum st_attachment_type statt)
+{
+   struct dri_drawable *drawable =
+      (struct dri_drawable *) stfbi->st_manager_private;
+   struct __DRIdri2LoaderExtensionRec *loader =
+      drawable->sPriv->dri2.loader;
+
+   /* TODO */
+   if (__dri1_api_hooks)
+      return FALSE;
+
+   if (statt == ST_ATTACHMENT_FRONT_LEFT && loader->flushFrontBuffer) {
+      loader->flushFrontBuffer(drawable->dPriv,
+            drawable->dPriv->loaderPrivate);
+   }
+
+   return TRUE;
+}
+
+/**
+ * Create a framebuffer from the given drawable.
+ */
+struct st_framebuffer_iface *
+dri_create_st_framebuffer(struct dri_drawable *drawable)
+{
+   struct st_framebuffer_iface *stfbi;
+
+   stfbi = CALLOC_STRUCT(st_framebuffer_iface);
+   if (stfbi) {
+      stfbi->visual = &drawable->stvis;
+      stfbi->flush_front = dri_st_framebuffer_flush_front;
+      stfbi->validate = dri_st_framebuffer_validate;
+      stfbi->st_manager_private = (void *) drawable;
+   }
+
+   return stfbi;
+}
+
+/**
+ * Destroy a framebuffer.
+ */
+void
+dri_destroy_st_framebuffer(struct st_framebuffer_iface *stfbi)
+{
+   FREE(stfbi);
+}
+
+/**
+ * Return the texture at an attachment.  Allocate the texture if it does not
+ * exist.
+ */
+struct pipe_texture *
+dri_get_st_framebuffer_texture(struct st_framebuffer_iface *stfbi,
+                               enum st_attachment_type statt)
+{
+   struct dri_drawable *drawable =
+      (struct dri_drawable *) stfbi->st_manager_private;
+   
+   if (!(drawable->texture_mask & (1 << statt))) {
+      enum st_attachment_type statts[ST_ATTACHMENT_COUNT];
+      unsigned i, count = 0;
+
+      /* make sure DRI2 does not destroy existing buffers */
+      for (i = 0; i < ST_ATTACHMENT_COUNT; i++) {
+         if (drawable->texture_mask & (1 << i)) {
+            statts[count++] = i;
+         }
+      }
+      statts[count++] = statt;
+
+      drawable->texture_stamp = drawable->dPriv->lastStamp - 1;
+      dri_st_framebuffer_validate(stfbi, statts, count, NULL);
+   }
+
+   return drawable->textures[statt];
+}
+
+/**
+ * Add a reference to the st_api of the state tracker.
+ */
+static void
+_dri_get_st_api(void)
+{
+   p_atomic_inc(&dri_st_api.refcnt);
+   if (p_atomic_read(&dri_st_api.refcnt) == 1)
+      dri_st_api.stapi = st_manager_create_api();
+}
+
+/**
+ * Remove a reference to the st_api of the state tracker.
+ */
+static void
+_dri_put_st_api(void)
+{
+   struct st_api *stapi = dri_st_api.stapi;
+
+   if (p_atomic_dec_zero(&dri_st_api.refcnt)) {
+      stapi->destroy(dri_st_api.stapi);
+      dri_st_api.stapi = NULL;
+   }
+}
+
+/**
+ * Create a state tracker manager from the given screen.
+ */
+struct st_manager *
+dri_create_st_manager(struct dri_screen *screen)
+{
+   struct st_manager *smapi;
+
+   smapi = CALLOC_STRUCT(st_manager);
+   if (smapi) {
+      smapi->screen = screen->pipe_screen;
+      _dri_get_st_api();
+   }
+
+   return smapi;
+}
+
+/**
+ * Destroy a state tracker manager.
+ */
+void
+dri_destroy_st_manager(struct st_manager *smapi)
+{
+   _dri_put_st_api();
+   FREE(smapi);
+}
+
+/**
+ * Return the st_api of OpenGL state tracker.
+ */
+struct st_api *
+dri_get_st_api(void)
+{
+   assert(dri_st_api.stapi);
+   return dri_st_api.stapi;
+}
diff --git a/src/gallium/state_trackers/dri/dri_st_api.h b/src/gallium/state_trackers/dri/dri_st_api.h
new file mode 100644
index 00000000000..7cf522e4690
--- /dev/null
+++ b/src/gallium/state_trackers/dri/dri_st_api.h
@@ -0,0 +1,55 @@
+/*
+ * 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 <[email protected]>
+ */
+
+#ifndef _DRI_ST_API_H_
+#define _DRI_ST_API_H_
+
+#include "state_tracker/st_api.h"
+
+struct dri_screen;
+struct dri_drawable;
+
+struct st_api *
+dri_get_st_api(void);
+
+struct st_manager *
+dri_create_st_manager(struct dri_screen *screen);
+
+void
+dri_destroy_st_manager(struct st_manager *smapi);
+
+struct st_framebuffer_iface *
+dri_create_st_framebuffer(struct dri_drawable *drawable);
+
+void
+dri_destroy_st_framebuffer(struct st_framebuffer_iface *stfbi);
+
+struct pipe_texture *
+dri_get_st_framebuffer_texture(struct st_framebuffer_iface *stfbi,
+                               enum st_attachment_type statt);
+
+#endif /* _DRI_ST_API_H_ */