1 files changed, 240 insertions, 0 deletions
diff --git a/src/cpuwinsys/cpuwinsys.c b/src/cpuwinsys/cpuwinsys.c
new file mode 100644
index 0000000..00d5efb
--- /dev/null
+++ b/src/cpuwinsys/cpuwinsys.c
@@ -0,0 +1,240 @@
+#include "cpuwinsys.h"
+
+#include "pipe/internal/p_winsys_screen.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"
+
+#ifdef GALLIUM_CELL
+#include "cell/ppu/cell_context.h"
+#include "cell/ppu/cell_screen.h"
+#include "cell/ppu/cell_winsys.h"
+#else
+#define TILE_SIZE 32  /* avoid compilation errors */
+#endif
+
+
+/**
+ * Subclass of pipe_winsys for Xlib winsys
+ */
+struct cpu_winsys {
+   struct pipe_winsys base;
+};
+
+/**
+ * Subclass of pipe_buffer for CL winsys.
+ * Low-level OS/window system memory buffer
+ */
+struct cpu_buffer
+{
+   struct pipe_buffer base;
+   boolean userBuffer;  /** Is this a user-space buffer? */
+   void *data;
+   void *mapped;
+};
+
+
+/** Cast wrapper */
+static INLINE struct cpu_buffer *
+cpu_buffer(struct pipe_buffer *buf)
+{
+   return (struct cpu_buffer *)buf;
+}
+
+
+/* Most callbacks map direcly onto dri_bufmgr operations:
+ */
+static void *
+cpu_buffer_map(struct pipe_winsys *pws, struct pipe_buffer *buf,
+               unsigned flags)
+{
+   struct cpu_buffer *cpu_buf = cpu_buffer(buf);
+   cpu_buf->mapped = cpu_buf->data;
+   return cpu_buf->mapped;
+}
+
+static void
+cpu_buffer_unmap(struct pipe_winsys *pws, struct pipe_buffer *buf)
+{
+   struct cpu_buffer *cpu_buf = cpu_buffer(buf);
+   cpu_buf->mapped = NULL;
+}
+
+static void
+cpu_buffer_destroy(struct pipe_winsys *pws,
+                   struct pipe_buffer *buf)
+{
+   struct cpu_buffer *oldBuf = cpu_buffer(buf);
+
+   if (oldBuf->data) {
+      if (!oldBuf->userBuffer) {
+         align_free(oldBuf->data);
+      }
+
+      oldBuf->data = NULL;
+   }
+
+   free(oldBuf);
+}
+
+
+static void
+cpu_flush_frontbuffer(struct pipe_winsys *pws,
+                     struct pipe_surface *surf,
+                     void *context_private)
+{
+   /*### do nothing? */
+}
+
+
+
+static const char *
+cpu_get_name(struct pipe_winsys *pws)
+{
+   return "OpenCL CPU";
+}
+
+
+static struct pipe_buffer *
+cpu_buffer_create(struct pipe_winsys *pws, 
+                  unsigned alignment, 
+                  unsigned usage,
+                  unsigned size)
+{
+   struct cpu_buffer *buffer = CALLOC_STRUCT(cpu_buffer);
+
+   buffer->base.alignment = alignment;
+   buffer->base.usage = usage;
+   buffer->base.size = size;
+
+   if (buffer->data == NULL) {
+      /* align to 16-byte multiple for Cell */
+      buffer->data = align_malloc(size, MAX2(alignment, 16));
+   }
+
+   return &buffer->base;
+}
+
+
+/**
+ * Create buffer which wraps user-space data.
+ */
+static struct pipe_buffer *
+cpu_user_buffer_create(struct pipe_winsys *pws, void *ptr, unsigned bytes)
+{
+   struct cpu_buffer *buffer = CALLOC_STRUCT(cpu_buffer);
+   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
+cpu_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;
+   surf->usage = flags;
+
+   return 0;
+}
+
+
+/**
+ * Called via winsys->surface_alloc() to create new surfaces.
+ */
+static struct pipe_surface *
+cpu_surface_alloc(struct pipe_winsys *ws)
+{
+   struct pipe_surface *surface = CALLOC_STRUCT(pipe_surface);
+
+   assert(ws);
+
+   return surface;
+}
+
+
+
+static void
+cpu_surface_release(struct pipe_winsys *winsys, struct pipe_surface **s)
+{
+   struct pipe_surface *surf = *s;
+   assert(!surf->texture);
+   *s = NULL;
+}
+
+
+/*
+ * Fence functions - basically nothing to do, as we don't create any actual
+ * fence objects.
+ */
+
+static void
+cpu_fence_reference(struct pipe_winsys *sws, struct pipe_fence_handle **ptr,
+                   struct pipe_fence_handle *fence)
+{
+}
+
+
+static int
+cpu_fence_signalled(struct pipe_winsys *sws, struct pipe_fence_handle *fence,
+                   unsigned flag)
+{
+   return 0;
+}
+
+
+static int
+cpu_fence_finish(struct pipe_winsys *sws, struct pipe_fence_handle *fence,
+                unsigned flag)
+{
+   return 0;
+}
+
+struct pipe_winsys * cpu_winsys(void)
+{
+   static struct cpu_winsys *ws = NULL;
+
+   if (!ws) {
+      ws = CALLOC_STRUCT(cpu_winsys);
+
+      /* Fill in this struct with callbacks that pipe will need to
+       * communicate with the buffer manager, etc.
+       */
+      ws->base.buffer_create = cpu_buffer_create;
+      ws->base.user_buffer_create = cpu_user_buffer_create;
+      ws->base.buffer_map = cpu_buffer_map;
+      ws->base.buffer_unmap = cpu_buffer_unmap;
+
+      ws->base.fence_reference = cpu_fence_reference;
+      ws->base.fence_signalled = cpu_fence_signalled;
+      ws->base.fence_finish = cpu_fence_finish;
+
+      ws->base.flush_frontbuffer = cpu_flush_frontbuffer;
+      ws->base.get_name = cpu_get_name;
+   }
+
+   return &ws->base;
+}