format_unpack: add 8/16 rgba/rgb types.

fixing these makes piglit fbo-integer pass on softpipe.

modified to re-order things, haven't addressed Eric's concerns,
can't find anything in spec that mentions sign extensions, it does say
integers aren't clamped or modified.

Signed-off-by: Dave Airlie <airlied@redhat.com>

src/mesa/main/format_unpack.c

@@ -1580,6 +1580,58 @@ unpack_int_rgba_RGBA_UINT32(const GLuint *src, GLuint dst[][4], GLuint n)
    memcpy(dst, src, n * 4 * sizeof(GLuint));
 }
 
+static void
+unpack_int_rgba_RGBA_UINT16(const GLushort *src, GLuint dst[][4], GLuint n)
+{
+   unsigned int i;
+
+   for (i = 0; i < n; i++) {
+      dst[i][0] = src[i * 4 + 0];
+      dst[i][1] = src[i * 4 + 1];
+      dst[i][2] = src[i * 4 + 2];
+      dst[i][3] = src[i * 4 + 3];
+   }
+}
+
+static void
+unpack_int_rgba_RGBA_INT16(const GLshort *src, GLuint dst[][4], GLuint n)
+{
+   unsigned int i;
+
+   for (i = 0; i < n; i++) {
+      dst[i][0] = src[i * 4 + 0];
+      dst[i][1] = src[i * 4 + 1];
+      dst[i][2] = src[i * 4 + 2];
+      dst[i][3] = src[i * 4 + 3];
+   }
+}
+
+static void
+unpack_int_rgba_RGBA_UINT8(const GLubyte *src, GLuint dst[][4], GLuint n)
+{
+   unsigned int i;
+
+   for (i = 0; i < n; i++) {
+      dst[i][0] = src[i * 4 + 0];
+      dst[i][1] = src[i * 4 + 1];
+      dst[i][2] = src[i * 4 + 2];
+      dst[i][3] = src[i * 4 + 3];
+   }
+}
+
+static void
+unpack_int_rgba_RGBA_INT8(const GLbyte *src, GLuint dst[][4], GLuint n)
+{
+   unsigned int i;
+
+   for (i = 0; i < n; i++) {
+      dst[i][0] = src[i * 4 + 0];
+      dst[i][1] = src[i * 4 + 1];
+      dst[i][2] = src[i * 4 + 2];
+      dst[i][3] = src[i * 4 + 3];
+   }
+}
+
 static void
 unpack_int_rgba_RGB_UINT32(const GLuint *src, GLuint dst[][4], GLuint n)
 {
@@ -1593,6 +1645,58 @@ unpack_int_rgba_RGB_UINT32(const GLuint *src, GLuint dst[][4], GLuint n)
    }
 }
 
+static void
+unpack_int_rgba_RGB_UINT16(const GLushort *src, GLuint dst[][4], GLuint n)
+{
+   unsigned int i;
+
+   for (i = 0; i < n; i++) {
+      dst[i][0] = src[i * 3 + 0];
+      dst[i][1] = src[i * 3 + 1];
+      dst[i][2] = src[i * 3 + 2];
+      dst[i][3] = 1;
+   }
+}
+
+static void
+unpack_int_rgba_RGB_INT16(const GLshort *src, GLuint dst[][4], GLuint n)
+{
+   unsigned int i;
+
+   for (i = 0; i < n; i++) {
+      dst[i][0] = src[i * 3 + 0];
+      dst[i][1] = src[i * 3 + 1];
+      dst[i][2] = src[i * 3 + 2];
+      dst[i][3] = 1;
+   }
+}
+
+static void
+unpack_int_rgba_RGB_UINT8(const GLubyte *src, GLuint dst[][4], GLuint n)
+{
+   unsigned int i;
+
+   for (i = 0; i < n; i++) {
+      dst[i][0] = src[i * 3 + 0];
+      dst[i][1] = src[i * 3 + 1];
+      dst[i][2] = src[i * 3 + 2];
+      dst[i][3] = 1;
+   }
+}
+
+static void
+unpack_int_rgba_RGB_INT8(const GLbyte *src, GLuint dst[][4], GLuint n)
+{
+   unsigned int i;
+
+   for (i = 0; i < n; i++) {
+      dst[i][0] = src[i * 3 + 0];
+      dst[i][1] = src[i * 3 + 1];
+      dst[i][2] = src[i * 3 + 2];
+      dst[i][3] = 1;
+   }
+}
+
 static void
 unpack_int_rgba_RG_UINT32(const GLuint *src, GLuint dst[][4], GLuint n)
 {
@@ -1677,10 +1781,40 @@ _mesa_unpack_int_rgba_row(gl_format format, GLuint n,
    case MESA_FORMAT_RGBA_INT32:
       unpack_int_rgba_RGBA_UINT32(src, dst, n);
       break;
+
+   case MESA_FORMAT_RGBA_UINT16:
+      unpack_int_rgba_RGBA_UINT16(src, dst, n);
+      break;
+   case MESA_FORMAT_RGBA_INT16:
+      unpack_int_rgba_RGBA_INT16(src, dst, n);
+      break;
+
+   case MESA_FORMAT_RGBA_UINT8:
+      unpack_int_rgba_RGBA_UINT8(src, dst, n);
+      break;
+   case MESA_FORMAT_RGBA_INT8:
+      unpack_int_rgba_RGBA_INT8(src, dst, n);
+      break;
+
    case MESA_FORMAT_RGB_UINT32:
    case MESA_FORMAT_RGB_INT32:
       unpack_int_rgba_RGB_UINT32(src, dst, n);
       break;
+
+   case MESA_FORMAT_RGB_UINT16:
+      unpack_int_rgba_RGB_UINT16(src, dst, n);
+      break;
+   case MESA_FORMAT_RGB_INT16:
+      unpack_int_rgba_RGB_INT16(src, dst, n);
+      break;
+
+   case MESA_FORMAT_RGB_UINT8:
+      unpack_int_rgba_RGB_UINT8(src, dst, n);
+      break;
+   case MESA_FORMAT_RGB_INT8:
+      unpack_int_rgba_RGB_INT8(src, dst, n);
+      break;
+
    case MESA_FORMAT_RG_UINT32:
    case MESA_FORMAT_RG_INT32:
       unpack_int_rgba_RG_UINT32(src, dst, n);