1 files changed, 344 insertions, 0 deletions
diff --git a/src/gallium/winsys/gdi/gdi_softpipe_winsys.c b/src/gallium/winsys/gdi/gdi_softpipe_winsys.c
new file mode 100644
index 0000000000..e66ce48f2d
--- /dev/null
+++ b/src/gallium/winsys/gdi/gdi_softpipe_winsys.c
@@ -0,0 +1,344 @@
+/**************************************************************************
+ *
+ * Copyright 2008 Tungsten Graphics, Inc., Bismarck, ND., USA
+ * All Rights Reserved.
+ *
+ * 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 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
+ * THE COPYRIGHT HOLDERS, AUTHORS 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.
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ *
+ *
+ **************************************************************************/
+
+/**
+ * @file
+ * Softpipe support.
+ *
+ * @author Keith Whitwell
+ * @author Brian Paul
+ * @author Jose Fonseca
+ */
+
+
+#include <windows.h>
+
+#include "pipe/p_winsys.h"
+#include "pipe/p_format.h"
+#include "pipe/p_context.h"
+#include "pipe/p_inlines.h"
+#include "util/u_math.h"
+#include "util/u_memory.h"
+#include "softpipe/sp_winsys.h"
+#include "stw_winsys.h"
+
+
+struct gdi_softpipe_buffer
+{
+   struct pipe_buffer base;
+   boolean userBuffer;  /** Is this a user-space buffer? */
+   void *data;
+   void *mapped;
+};
+
+
+/** Cast wrapper */
+static INLINE struct gdi_softpipe_buffer *
+gdi_softpipe_buffer( struct pipe_buffer *buf )
+{
+   return (struct gdi_softpipe_buffer *)buf;
+}
+
+
+static void *
+gdi_softpipe_buffer_map(struct pipe_winsys *winsys,
+                        struct pipe_buffer *buf,
+                        unsigned flags)
+{
+   struct gdi_softpipe_buffer *gdi_softpipe_buf = gdi_softpipe_buffer(buf);
+   gdi_softpipe_buf->mapped = gdi_softpipe_buf->data;
+   return gdi_softpipe_buf->mapped;
+}
+
+
+static void
+gdi_softpipe_buffer_unmap(struct pipe_winsys *winsys,
+                          struct pipe_buffer *buf)
+{
+   struct gdi_softpipe_buffer *gdi_softpipe_buf = gdi_softpipe_buffer(buf);
+   gdi_softpipe_buf->mapped = NULL;
+}
+
+
+static void
+gdi_softpipe_buffer_destroy(struct pipe_winsys *winsys,
+                            struct pipe_buffer *buf)
+{
+   struct gdi_softpipe_buffer *oldBuf = gdi_softpipe_buffer(buf);
+
+   if (oldBuf->data) {
+      if (!oldBuf->userBuffer)
+         align_free(oldBuf->data);
+
+      oldBuf->data = NULL;
+   }
+
+   FREE(oldBuf);
+}
+
+
+static const char *
+gdi_softpipe_get_name(struct pipe_winsys *winsys)
+{
+   return "softpipe";
+}
+
+
+static struct pipe_buffer *
+gdi_softpipe_buffer_create(struct pipe_winsys *winsys,
+                           unsigned alignment,
+                           unsigned usage,
+                           unsigned size)
+{
+   struct gdi_softpipe_buffer *buffer = CALLOC_STRUCT(gdi_softpipe_buffer);
+
+   buffer->base.refcount = 1;
+   buffer->base.alignment = alignment;
+   buffer->base.usage = usage;
+   buffer->base.size = size;
+
+   buffer->data = align_malloc(size, alignment);
+
+   return &buffer->base;
+}
+
+
+/**
+ * Create buffer which wraps user-space data.
+ */
+static struct pipe_buffer *
+gdi_softpipe_user_buffer_create(struct pipe_winsys *winsys,
+                               void *ptr,
+                               unsigned bytes)
+{
+   struct gdi_softpipe_buffer *buffer;
+
+   buffer = CALLOC_STRUCT(gdi_softpipe_buffer);
+   if(!buffer)
+      return NULL;
+
+   buffer->base.refcount = 1;
+   buffer->base.size = bytes;
+   buffer->userBuffer = TRUE;
+   buffer->data = ptr;
+
+   return &buffer->base;
+}
+
+
+/**
+ * Round n up to next multiple.
+ */
+static INLINE unsigned
+round_up(unsigned n, unsigned multiple)
+{
+   return (n + multiple - 1) & ~(multiple - 1);
+}
+
+
+static int
+gdi_softpipe_surface_alloc_storage(struct pipe_winsys *winsys,
+                                   struct pipe_surface *surf,
+                                   unsigned width, unsigned height,
+                                   enum pipe_format format,
+                                   unsigned flags,
+                                   unsigned tex_usage)
+{
+   const unsigned alignment = 64;
+
+   surf->width = width;
+   surf->height = height;
+   surf->format = format;
+   pf_get_block(format, &surf->block);
+   surf->nblocksx = pf_get_nblocksx(&surf->block, width);
+   surf->nblocksy = pf_get_nblocksy(&surf->block, height);
+   surf->stride = round_up(surf->nblocksx * surf->block.size, alignment);
+   surf->usage = flags;
+
+   assert(!surf->buffer);
+   surf->buffer = winsys->buffer_create(winsys, alignment,
+                                        PIPE_BUFFER_USAGE_PIXEL,
+                                        surf->stride * surf->nblocksy);
+   if(!surf->buffer)
+      return -1;
+
+   return 0;
+}
+
+
+static struct pipe_surface *
+gdi_softpipe_surface_alloc(struct pipe_winsys *winsys)
+{
+   struct pipe_surface *surface = CALLOC_STRUCT(pipe_surface);
+
+   assert(winsys);
+
+   surface->refcount = 1;
+   surface->winsys = winsys;
+
+   return surface;
+}
+
+
+static void
+gdi_softpipe_surface_release(struct pipe_winsys *winsys,
+                             struct pipe_surface **s)
+{
+   struct pipe_surface *surf = *s;
+   assert(!surf->texture);
+   surf->refcount--;
+   if (surf->refcount == 0) {
+      if (surf->buffer)
+	winsys_buffer_reference(winsys, &surf->buffer, NULL);
+      free(surf);
+   }
+   *s = NULL;
+}
+
+
+static void
+gdi_softpipe_dummy_flush_frontbuffer(struct pipe_winsys *winsys,
+                                     struct pipe_surface *surface,
+                                     void *context_private)
+{
+   assert(0);
+}
+
+
+static void
+gdi_softpipe_fence_reference(struct pipe_winsys *winsys,
+                             struct pipe_fence_handle **ptr,
+                             struct pipe_fence_handle *fence)
+{
+}
+
+
+static int
+gdi_softpipe_fence_signalled(struct pipe_winsys *winsys,
+                             struct pipe_fence_handle *fence,
+                             unsigned flag)
+{
+   return 0;
+}
+
+
+static int
+gdi_softpipe_fence_finish(struct pipe_winsys *winsys,
+                          struct pipe_fence_handle *fence,
+                          unsigned flag)
+{
+   return 0;
+}
+
+
+static void
+gdi_softpipe_destroy(struct pipe_winsys *winsys)
+{
+   FREE(winsys);
+}
+
+
+static struct pipe_screen *
+gdi_softpipe_screen_create(void)
+{
+   static struct pipe_winsys *winsys;
+   struct pipe_screen *screen;
+
+   winsys = CALLOC_STRUCT(pipe_winsys);
+   if(!winsys)
+      return NULL;
+
+   winsys->destroy = gdi_softpipe_destroy;
+
+   winsys->buffer_create = gdi_softpipe_buffer_create;
+   winsys->user_buffer_create = gdi_softpipe_user_buffer_create;
+   winsys->buffer_map = gdi_softpipe_buffer_map;
+   winsys->buffer_unmap = gdi_softpipe_buffer_unmap;
+   winsys->buffer_destroy = gdi_softpipe_buffer_destroy;
+
+   winsys->surface_alloc = gdi_softpipe_surface_alloc;
+   winsys->surface_alloc_storage = gdi_softpipe_surface_alloc_storage;
+   winsys->surface_release = gdi_softpipe_surface_release;
+
+   winsys->fence_reference = gdi_softpipe_fence_reference;
+   winsys->fence_signalled = gdi_softpipe_fence_signalled;
+   winsys->fence_finish = gdi_softpipe_fence_finish;
+
+   winsys->flush_frontbuffer = gdi_softpipe_dummy_flush_frontbuffer;
+   winsys->get_name = gdi_softpipe_get_name;
+
+   screen = softpipe_create_screen(winsys);
+   if(!screen)
+      gdi_softpipe_destroy(winsys);
+
+   return screen;
+}
+
+
+static struct pipe_context *
+gdi_softpipe_context_create(struct pipe_screen *screen)
+{
+   return softpipe_create(screen, screen->winsys, NULL);
+}
+
+
+static void
+gdi_softpipe_flush_frontbuffer(struct pipe_winsys *winsys,
+                               struct pipe_surface *surface,
+                               HDC hDC)
+{
+    struct gdi_softpipe_buffer *buffer;
+    BITMAPINFO bmi;
+
+    buffer = gdi_softpipe_buffer(surface->buffer);
+
+    memset(&bmi, 0, sizeof(BITMAPINFO));
+    bmi.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
+    bmi.bmiHeader.biWidth = surface->stride / pf_get_size(surface->format);
+    bmi.bmiHeader.biHeight= -surface->height;
+    bmi.bmiHeader.biPlanes = 1;
+    bmi.bmiHeader.biBitCount = pf_get_bits(surface->format);
+    bmi.bmiHeader.biCompression = BI_RGB;
+    bmi.bmiHeader.biSizeImage = 0;
+    bmi.bmiHeader.biXPelsPerMeter = 0;
+    bmi.bmiHeader.biYPelsPerMeter = 0;
+    bmi.bmiHeader.biClrUsed = 0;
+    bmi.bmiHeader.biClrImportant = 0;
+
+    StretchDIBits(hDC,
+                  0, 0, surface->width, surface->height,
+                  0, 0, surface->width, surface->height,
+                  buffer->data, &bmi, 0, SRCCOPY);
+}
+
+
+const struct stw_winsys stw_winsys = {
+   &gdi_softpipe_screen_create,
+   &gdi_softpipe_context_create,
+   &gdi_softpipe_flush_frontbuffer
+};