surface_alloc() is now a winsys function.

This allows surfaces to be allocated without a rendering context.
A few loose ends to resolve, but in working condition.

1 files changed, 149 insertions, 40 deletions

diff --git a/src/mesa/pipe/i915simple/i915_surface.c b/src/mesa/pipe/i915simple/i915_surface.c
index a07a21c13b1..b4b5bd1ce57 100644
--- a/src/mesa/pipe/i915simple/i915_surface.c
+++ b/src/mesa/pipe/i915simple/i915_surface.c
@@ -29,13 +29,20 @@
 #include "i915_state.h"
 #include "pipe/p_defines.h"
 #include "pipe/p_util.h"
+#include "pipe/p_winsys.h"
 
 
-struct i915_surface
-{
-   struct pipe_surface surface;
-   /* anything else? */
-};
+#define CLIP_TILE \
+   do { \
+      if (x >= ps->width) \
+         return; \
+      if (y >= ps->height) \
+         return; \
+      if (x + w > ps->width) \
+         w = ps->width - x; \
+      if (y + h > ps->height) \
+         h = ps->height -y; \
+   } while(0)
 
 
 /**
@@ -53,30 +60,44 @@ i915_get_tile_rgba(struct pipe_context *pipe,
    unsigned i, j;
    unsigned w0 = w;
 
-   assert(ps->format == PIPE_FORMAT_U_A8_R8_G8_B8);
-
-#if 0
-   assert(x + w <= ps->width);
-   assert(y + h <= ps->height);
-#else
-   /* temp clipping hack */
-   if (x + w > ps->width)
-      w = ps->width - x;
-   if (y + h > ps->height)
-      h = ps->height -y;
-#endif
-   for (i = 0; i < h; i++) {
-      float *pRow = p;
-      for (j = 0; j < w; j++) {
-         const unsigned pixel = src[j];
-         pRow[0] = UBYTE_TO_FLOAT((pixel >> 16) & 0xff);
-         pRow[1] = UBYTE_TO_FLOAT((pixel >>  8) & 0xff);
-         pRow[2] = UBYTE_TO_FLOAT((pixel >>  0) & 0xff);
-         pRow[3] = UBYTE_TO_FLOAT((pixel >> 24) & 0xff);
-         pRow += 4;
+   CLIP_TILE;
+
+   switch (ps->format) {
+   case PIPE_FORMAT_U_A8_R8_G8_B8:
+      for (i = 0; i < h; i++) {
+         float *pRow = p;
+         for (j = 0; j < w; j++) {
+            const unsigned pixel = src[j];
+            pRow[0] = UBYTE_TO_FLOAT((pixel >> 16) & 0xff);
+            pRow[1] = UBYTE_TO_FLOAT((pixel >>  8) & 0xff);
+            pRow[2] = UBYTE_TO_FLOAT((pixel >>  0) & 0xff);
+            pRow[3] = UBYTE_TO_FLOAT((pixel >> 24) & 0xff);
+            pRow += 4;
+         }
+         src += ps->region->pitch;
+         p += w0 * 4;
+      }
+      break;
+   case PIPE_FORMAT_S8_Z24:
+      {
+         const float scale = 1.0 / (float) 0xffffff;
+         for (i = 0; i < h; i++) {
+            float *pRow = p;
+            for (j = 0; j < w; j++) {
+               const unsigned pixel = src[j];
+               pRow[0] =
+               pRow[1] =
+               pRow[2] =
+               pRow[3] = (pixel & 0xffffff) * scale;
+               pRow += 4;
+            }
+            src += ps->region->pitch;
+            p += w0 * 4;
+         }
       }
-      src += ps->region->pitch;
-      p += w0 * 4;
+      break;
+   default:
+      assert(0);
    }
 }
 
@@ -86,34 +107,122 @@ i915_put_tile_rgba(struct pipe_context *pipe,
                    struct pipe_surface *ps,
                    uint x, uint y, uint w, uint h, const float *p)
 {
-   /* any need to put tiles into i915 surfaces? */
+   /* TODO */
    assert(0);
 }
 
 
+/*
+ * XXX note: same as code in sp_surface.c
+ */
+static void
+i915_get_tile(struct pipe_context *pipe,
+              struct pipe_surface *ps,
+              uint x, uint y, uint w, uint h,
+              void *p, int dst_stride)
+{
+   const uint cpp = ps->region->cpp;
+   const uint w0 = w;
+   const ubyte *pSrc;
+   ubyte *pDest;
+   uint i;
 
-static struct pipe_surface *
-i915_surface_alloc(struct pipe_context *pipe, unsigned format)
+   assert(ps->region->map);
+
+   CLIP_TILE;
+
+   if (dst_stride == 0) {
+      dst_stride = w0 * cpp;
+   }
+
+   pSrc = ps->region->map + ps->offset + (y * ps->region->pitch + x) * cpp;
+   pDest = (ubyte *) p;
+
+   for (i = 0; i < h; i++) {
+      memcpy(pDest, pSrc, w0 * cpp);
+      pDest += dst_stride;
+      pSrc += ps->region->pitch * cpp;
+   }
+}
+
+
+/*
+ * XXX note: same as code in sp_surface.c
+ */
+static void
+i915_put_tile(struct pipe_context *pipe,
+              struct pipe_surface *ps,
+              uint x, uint y, uint w, uint h,
+              const void *p, int src_stride)
 {
-   struct i915_surface *surf = CALLOC_STRUCT(i915_surface);
+   const uint cpp = ps->region->cpp;
+   const uint w0 = w;
+   const ubyte *pSrc;
+   ubyte *pDest;
+   uint i;
+
+   assert(ps->region->map);
+
+   CLIP_TILE;
+
+   if (src_stride == 0) {
+      src_stride = w0 * cpp;
+   }
+
+   pSrc = (const ubyte *) p;
+   pDest = ps->region->map + ps->offset + (y * ps->region->pitch + x) * cpp;
+
+   for (i = 0; i < h; i++) {
+      memcpy(pDest, pSrc, w0 * cpp);
+      pDest += ps->region->pitch * cpp;
+      pSrc += src_stride;
+   }
+}
 
-   if (!surf)
-      return NULL;
 
-   surf->surface.format = format;
-   surf->surface.refcount = 1;
+/*
+ * XXX note: same as code in sp_surface.c
+ */
+static struct pipe_surface *
+i915_get_tex_surface(struct pipe_context *pipe,
+                     struct pipe_mipmap_tree *mt,
+                     unsigned face, unsigned level, unsigned zslice)
+{
+   struct pipe_surface *ps;
+   unsigned offset;  /* in bytes */
 
-   //   surf->surface.get_tile = i915_get_tile;
-   //   surf->surface.put_tile = i915_put_tile;
+   offset = mt->level[level].level_offset;
 
-   return &surf->surface;
+   if (mt->target == PIPE_TEXTURE_CUBE) {
+      offset += mt->level[level].image_offset[face] * mt->cpp;
+   }
+   else if (mt->target == PIPE_TEXTURE_3D) {
+      offset += mt->level[level].image_offset[zslice] * mt->cpp;
+   }
+   else {
+      assert(face == 0);
+      assert(zslice == 0);
+   }
+
+   ps = pipe->winsys->surface_alloc(pipe->winsys, mt->format);
+   if (ps) {
+      assert(ps->format);
+      assert(ps->refcount);
+      pipe_region_reference(&ps->region, mt->region);
+      ps->width = mt->level[level].width;
+      ps->height = mt->level[level].height;
+      ps->offset = offset;
+   }
+   return ps;
 }
 
 
 void
 i915_init_surface_functions(struct i915_context *i915)
 {
-   i915->pipe.surface_alloc = i915_surface_alloc;
+   i915->pipe.get_tex_surface = i915_get_tex_surface;
+   i915->pipe.get_tile = i915_get_tile;
+   i915->pipe.put_tile = i915_put_tile;
    i915->pipe.get_tile_rgba = i915_get_tile_rgba;
    i915->pipe.put_tile_rgba = i915_put_tile_rgba;
 }