gallium: Initial support for pixel formats with unused storage components.

Also clarify that RGB formats with no (used) alpha component are treated as
having alpha = 1.0.

3 files changed, 92 insertions, 0 deletions

diff --git a/src/gallium/auxiliary/util/p_tile.c b/src/gallium/auxiliary/util/p_tile.c
index 520da5cecd5..91283a9ab08 100644
--- a/src/gallium/auxiliary/util/p_tile.c
+++ b/src/gallium/auxiliary/util/p_tile.c
@@ -169,6 +169,52 @@ a8r8g8b8_put_tile_rgba(unsigned *dst,
 }
 
 
+/*** PIPE_FORMAT_A8R8G8B8_UNORM ***/
+
+static void
+x8r8g8b8_get_tile_rgba(unsigned *src,
+                       unsigned w, unsigned h,
+                       float *p,
+                       unsigned dst_stride)
+{
+   unsigned i, j;
+
+   for (i = 0; i < h; i++) {
+      float *pRow = p;
+      for (j = 0; j < w; j++, pRow += 4) {
+         const unsigned pixel = *src++;
+         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(0xff);
+      }
+      p += dst_stride;
+   }
+}
+
+
+static void
+x8r8g8b8_put_tile_rgba(unsigned *dst,
+                       unsigned w, unsigned h,
+                       const float *p,
+                       unsigned src_stride)
+{
+   unsigned i, j;
+
+   for (i = 0; i < h; i++) {
+      const float *pRow = p;
+      for (j = 0; j < w; j++, pRow += 4) {
+         unsigned r, g, b;
+         UNCLAMPED_FLOAT_TO_UBYTE(r, pRow[0]);
+         UNCLAMPED_FLOAT_TO_UBYTE(g, pRow[1]);
+         UNCLAMPED_FLOAT_TO_UBYTE(b, pRow[2]);
+         *dst++ = (0xff << 24) | (r << 16) | (g << 8) | b;
+      }
+      p += src_stride;
+   }
+}
+
+
 /*** PIPE_FORMAT_B8G8R8A8_UNORM ***/
 
 static void
@@ -647,6 +693,9 @@ pipe_get_tile_rgba(struct pipe_context *pipe,
    case PIPE_FORMAT_A8R8G8B8_UNORM:
       a8r8g8b8_get_tile_rgba((unsigned *) packed, w, h, p, dst_stride);
       break;
+   case PIPE_FORMAT_X8R8G8B8_UNORM:
+      x8r8g8b8_get_tile_rgba((unsigned *) packed, w, h, p, dst_stride);
+      break;
    case PIPE_FORMAT_B8G8R8A8_UNORM:
       b8g8r8a8_get_tile_rgba((unsigned *) packed, w, h, p, dst_stride);
       break;
@@ -723,6 +772,9 @@ pipe_put_tile_rgba(struct pipe_context *pipe,
    case PIPE_FORMAT_A8R8G8B8_UNORM:
       a8r8g8b8_put_tile_rgba((unsigned *) packed, w, h, p, src_stride);
       break;
+   case PIPE_FORMAT_X8R8G8B8_UNORM:
+      x8r8g8b8_put_tile_rgba((unsigned *) packed, w, h, p, src_stride);
+      break;
    case PIPE_FORMAT_B8G8R8A8_UNORM:
       b8g8r8a8_put_tile_rgba((unsigned *) packed, w, h, p, src_stride);
       break;
diff --git a/src/gallium/auxiliary/util/u_gen_mipmap.c b/src/gallium/auxiliary/util/u_gen_mipmap.c
index dfdb5f16fe7..b8dc6c66c01 100644
--- a/src/gallium/auxiliary/util/u_gen_mipmap.c
+++ b/src/gallium/auxiliary/util/u_gen_mipmap.c
@@ -475,7 +475,9 @@ format_to_type_comps(enum pipe_format pformat,
 {
    switch (pformat) {
    case PIPE_FORMAT_A8R8G8B8_UNORM:
+   case PIPE_FORMAT_X8R8G8B8_UNORM:
    case PIPE_FORMAT_B8G8R8A8_UNORM:
+   case PIPE_FORMAT_B8G8R8X8_UNORM:
       *datatype = UBYTE;
       *comps = 4;
       return;
diff --git a/src/gallium/auxiliary/util/u_pack_color.h b/src/gallium/auxiliary/util/u_pack_color.h
index 1f6604c554e..50ef44992b8 100644
--- a/src/gallium/auxiliary/util/u_pack_color.h
+++ b/src/gallium/auxiliary/util/u_pack_color.h
@@ -53,18 +53,36 @@ util_pack_color_ub(ubyte r, ubyte g, ubyte b, ubyte a,
          *d = (r << 24) | (g << 16) | (b << 8) | a;
       }
       return;
+   case PIPE_FORMAT_R8G8B8X8_UNORM:
+      {
+         uint *d = (uint *) dest;
+         *d = (r << 24) | (g << 16) | (b << 8) | 0xff;
+      }
+      return;
    case PIPE_FORMAT_A8R8G8B8_UNORM:
       {
          uint *d = (uint *) dest;
          *d = (a << 24) | (r << 16) | (g << 8) | b;
       }
       return;
+   case PIPE_FORMAT_X8R8G8B8_UNORM:
+      {
+         uint *d = (uint *) dest;
+         *d = (0xff << 24) | (r << 16) | (g << 8) | b;
+      }
+      return;
    case PIPE_FORMAT_B8G8R8A8_UNORM:
       {
          uint *d = (uint *) dest;
          *d = (b << 24) | (g << 16) | (r << 8) | a;
       }
       return;
+   case PIPE_FORMAT_B8G8R8X8_UNORM:
+      {
+         uint *d = (uint *) dest;
+         *d = (b << 24) | (g << 16) | (r << 8) | 0xff;
+      }
+      return;
    case PIPE_FORMAT_R5G6B5_UNORM:
       {
          ushort *d = (ushort *) dest;
@@ -101,18 +119,36 @@ util_pack_color(const float rgba[4], enum pipe_format format, void *dest)
          *d = (r << 24) | (g << 16) | (b << 8) | a;
       }
       return;
+   case PIPE_FORMAT_R8G8B8X8_UNORM:
+      {
+         uint *d = (uint *) dest;
+         *d = (r << 24) | (g << 16) | (b << 8) | 0xff;
+      }
+      return;
    case PIPE_FORMAT_A8R8G8B8_UNORM:
       {
          uint *d = (uint *) dest;
          *d = (a << 24) | (r << 16) | (g << 8) | b;
       }
       return;
+   case PIPE_FORMAT_X8R8G8B8_UNORM:
+      {
+         uint *d = (uint *) dest;
+         *d = (0xff << 24) | (r << 16) | (g << 8) | b;
+      }
+      return;
    case PIPE_FORMAT_B8G8R8A8_UNORM:
       {
          uint *d = (uint *) dest;
          *d = (b << 24) | (g << 16) | (r << 8) | a;
       }
       return;
+   case PIPE_FORMAT_B8G8R8X8_UNORM:
+      {
+         uint *d = (uint *) dest;
+         *d = (b << 24) | (g << 16) | (r << 8) | 0xff;
+      }
+      return;
    case PIPE_FORMAT_R5G6B5_UNORM:
       {
          ushort *d = (ushort *) dest;
@@ -159,8 +195,10 @@ util_pack_z(enum pipe_format format, double z)
       else
          return (uint) (z * 0xffffffff);
    case PIPE_FORMAT_S8Z24_UNORM:
+   case PIPE_FORMAT_X8Z24_UNORM:
       return (uint) (z * 0xffffff);
    case PIPE_FORMAT_Z24S8_UNORM:
+   case PIPE_FORMAT_Z24X8_UNORM:
       return ((uint) (z * 0xffffff)) << 8;
    default:
       debug_printf("gallium: unhandled fomrat in util_pack_z()");