st/dri: Reshuffle files and make it obvious which files are shared

In short:
git mv ../drisw/Makefile dri/sw
git mv drisw.[c|h] sw
git mv dri2.[c|h] dri1.[c|h] Makefile drm
git rm ../drisw
ln -s <common files> drm/*
ln -s <common files> sw/*

1 files changed, 318 insertions, 0 deletions

diff --git a/src/gallium/state_trackers/dri/sw/drisw.c b/src/gallium/state_trackers/dri/sw/drisw.c
new file mode 100644
index 00000000000..73bc45d9060
--- /dev/null
+++ b/src/gallium/state_trackers/dri/sw/drisw.c
@@ -0,0 +1,318 @@
+/**************************************************************************
+ *
+ * Copyright 2009, VMware, Inc.
+ * All Rights Reserved.
+ * Copyright 2010 George Sapountzis <[email protected]>
+ *
+ * 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, sub license, 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 (including the
+ * next paragraph) 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 NON-INFRINGEMENT.
+ * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS 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.
+ *
+ **************************************************************************/
+
+/* TODO:
+ *
+ * stride:
+ *
+ * The driver and the loaders (libGL, xserver/glx) compute the stride from the
+ * width independently. winsys has a workaround that works for softpipe but may
+ * explode for other drivers or platforms, rendering- or performance-wise.
+ * Solving this issue properly requires extending the DRISW loader extension,
+ * in order to make the stride available to the putImage callback.
+ *
+ * drisw_api:
+ *
+ * Define drisw_api similarly to dri_api and use it to call the loader. This is
+ * predicated on support for calling the loader from the winsys, which has to
+ * grow for DRI2 as well.
+ *
+ * xshm:
+ *
+ * Allow the loaders to use the XSHM extension. It probably requires callbacks
+ * for createImage/destroyImage similar to DRI2 getBuffers. Probably not worth
+ * it, given the scope of DRISW, unless it falls naturally from properly
+ * solving the above two issues.
+ *
+ * swrast_create_screen:
+ *
+ * Allow for any software renderer to be used. Factor out the code from
+ * targets/libgl-xlib/xlib.c, put it in targets/common or winsys/sw/common and
+ * use it in all software targets.
+ */
+
+#include "util/u_memory.h"
+#include "util/u_inlines.h"
+#include "pipe/p_context.h"
+#include "state_tracker/drm_api.h"
+
+#include "dri_screen.h"
+#include "dri_context.h"
+#include "dri_drawable.h"
+#include "dri_st_api.h"
+#include "dri1_helper.h"
+#include "drisw.h"
+
+
+static INLINE void
+get_drawable_info(__DRIdrawable *dPriv, int *w, int *h)
+{
+   __DRIscreen *sPriv = dPriv->driScreenPriv;
+   const __DRIswrastLoaderExtension *loader = sPriv->swrast_loader;
+   int x, y;
+
+   loader->getDrawableInfo(dPriv,
+                           &x, &y, w, h,
+                           dPriv->loaderPrivate);
+}
+
+static INLINE void
+put_image(__DRIdrawable *dPriv, void *data)
+{
+   __DRIscreen *sPriv = dPriv->driScreenPriv;
+   const __DRIswrastLoaderExtension *loader = sPriv->swrast_loader;
+
+   loader->putImage(dPriv, __DRI_SWRAST_IMAGE_OP_SWAP,
+                    0, 0, dPriv->w, dPriv->h,
+                    data, dPriv->loaderPrivate);
+}
+
+void
+drisw_update_drawable_info(__DRIdrawable *dPriv)
+{
+   get_drawable_info(dPriv, &dPriv->w, &dPriv->h);
+}
+
+static INLINE void
+drisw_present_texture(__DRIdrawable *dPriv,
+                      struct pipe_texture *ptex)
+{
+   struct dri_drawable *drawable = dri_drawable(dPriv);
+   struct dri_screen *screen = dri_screen(drawable->sPriv);
+   struct pipe_context *pipe;
+   struct pipe_surface *psurf;
+   struct pipe_transfer *ptrans;
+   void *pmap;
+
+   pipe = dri1_get_pipe_context(screen);
+   psurf = dri1_get_pipe_surface(drawable, ptex);
+   if (!pipe || !psurf)
+      return;
+
+   ptrans = pipe->get_tex_transfer(pipe, ptex, 0, 0, 0,
+                                   PIPE_TRANSFER_READ,
+                                   0, 0, dPriv->w, dPriv->h);
+
+   pmap = pipe->transfer_map(pipe, ptrans);
+
+   assert(pmap);
+
+   put_image(dPriv, pmap);
+
+   pipe->transfer_unmap(pipe, ptrans);
+
+   pipe->tex_transfer_destroy(pipe, ptrans);
+}
+
+static INLINE void
+drisw_invalidate_drawable(__DRIdrawable *dPriv)
+{
+   struct dri_context *ctx = dri_get_current();
+   struct dri_drawable *drawable = dri_drawable(dPriv);
+
+   drawable->texture_stamp = dPriv->lastStamp - 1;
+
+   /* check if swapping currently bound buffer */
+   if (ctx && ctx->dPriv == dPriv)
+      ctx->st->notify_invalid_framebuffer(ctx->st, drawable->stfb);
+}
+
+static INLINE void
+drisw_copy_to_front(__DRIdrawable * dPriv,
+                    struct pipe_texture *ptex)
+{
+   drisw_present_texture(dPriv, ptex);
+
+   drisw_invalidate_drawable(dPriv);
+}
+
+/*
+ * Backend functions for st_framebuffer interface and swap_buffers.
+ */
+
+void
+drisw_flush_frontbuffer(struct dri_drawable *drawable,
+                        enum st_attachment_type statt)
+{
+   struct dri_context *ctx = dri_get_current();
+   struct pipe_texture *ptex;
+
+   if (!ctx)
+      return;
+
+   ptex = drawable->textures[statt];
+
+   if (ptex) {
+      drisw_copy_to_front(ctx->dPriv, ptex);
+   }
+}
+
+void
+drisw_swap_buffers(__DRIdrawable *dPriv)
+{
+   struct dri_context *ctx = dri_get_current();
+   struct dri_drawable *drawable = dri_drawable(dPriv);
+   struct pipe_texture *ptex;
+
+   if (!ctx)
+      return;
+
+   ptex = drawable->textures[ST_ATTACHMENT_BACK_LEFT];
+
+   if (ptex) {
+      ctx->st->flush(ctx->st, PIPE_FLUSH_RENDER_CACHE, NULL);
+
+      drisw_copy_to_front(dPriv, ptex);
+   }
+}
+
+/**
+ * Allocate framebuffer attachments.
+ *
+ * During fixed-size operation, the function keeps allocating new attachments
+ * as they are requested. Unused attachments are not removed, not until the
+ * framebuffer is resized or destroyed.
+ *
+ * It should be possible for DRI1 and DRISW to share this function, but it
+ * seems a better seperation and safer for each DRI version to provide its own
+ * function.
+ */
+void
+drisw_allocate_textures(struct dri_drawable *drawable,
+                        unsigned mask)
+{
+   struct dri_screen *screen = dri_screen(drawable->sPriv);
+   struct pipe_texture templ;
+   unsigned width, height;
+   boolean resized;
+   int i;
+
+   width  = drawable->dPriv->w;
+   height = drawable->dPriv->h;
+
+   resized = (drawable->old_w != width ||
+              drawable->old_h != height);
+
+   /* remove outdated textures */
+   if (resized) {
+      for (i = 0; i < ST_ATTACHMENT_COUNT; i++)
+         pipe_texture_reference(&drawable->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 tex_usage;
+
+      /* the texture already exists or not requested */
+      if (drawable->textures[i] || !(mask & (1 << i))) {
+         continue;
+      }
+
+      switch (i) {
+      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;
+         tex_usage = PIPE_TEXTURE_USAGE_DISPLAY_TARGET |
+                     PIPE_TEXTURE_USAGE_RENDER_TARGET;
+         break;
+      case ST_ATTACHMENT_DEPTH_STENCIL:
+         format = drawable->stvis.depth_stencil_format;
+         tex_usage = PIPE_TEXTURE_USAGE_DEPTH_STENCIL;
+         break;
+      default:
+         format = PIPE_FORMAT_NONE;
+         break;
+      }
+
+      if (format != PIPE_FORMAT_NONE) {
+         templ.format = format;
+         templ.tex_usage = tex_usage;
+
+         drawable->textures[i] =
+            screen->pipe_screen->texture_create(screen->pipe_screen, &templ);
+      }
+   }
+
+   drawable->old_w = width;
+   drawable->old_h = height;
+}
+
+/*
+ * Backend function for init_screen.
+ */
+
+static const __DRIextension *drisw_screen_extensions[] = {
+   NULL
+};
+
+const __DRIconfig **
+drisw_init_screen(__DRIscreen * sPriv)
+{
+   struct dri_screen *screen;
+   struct drm_create_screen_arg arg;
+
+   screen = CALLOC_STRUCT(dri_screen);
+   if (!screen)
+      return NULL;
+
+   screen->api = drm_api_create();
+   screen->sPriv = sPriv;
+   screen->fd = -1;
+   sPriv->private = (void *)screen;
+   sPriv->extensions = drisw_screen_extensions;
+   arg.mode = DRM_CREATE_DRISW;
+
+   screen->pipe_screen = screen->api->create_screen(screen->api, -1, &arg);
+   if (!screen->pipe_screen) {
+      debug_printf("%s: failed to create pipe_screen\n", __FUNCTION__);
+      goto fail;
+   }
+
+   screen->smapi = dri_create_st_manager(screen);
+   if (!screen->smapi)
+      goto fail;
+
+   driParseOptionInfo(&screen->optionCache,
+                      __driConfigOptions, __driNConfigOptions);
+
+   return dri_fill_in_modes(screen, 32);
+fail:
+   dri_destroy_screen(sPriv);
+   return NULL;
+}
+
+/* vim: set sw=3 ts=8 sts=3 expandtab: */