Mesa (master): st: consolidate format->usage computation

[Brian Paul]

Module: Mesa
Branch: master
Commit: 1ad2484f03cbe9ae6bd4ebe50d6894e570d65952
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=1ad2484f03cbe9ae6bd4ebe50d6894e570d65952

Author: Brian Paul <brianp at vmware.com>
Date:   Thu Apr  9 14:41:49 2009 -0600

st: consolidate format->usage computation

---

 src/mesa/state_tracker/st_cb_texture.c |   32 +++++++++++++++++++++++---------
 1 files changed, 23 insertions(+), 9 deletions(-)

diff --git a/src/mesa/state_tracker/st_cb_texture.c b/src/mesa/state_tracker/st_cb_texture.c
index c9f5751..197ded7 100644
--- a/src/mesa/state_tracker/st_cb_texture.c
+++ b/src/mesa/state_tracker/st_cb_texture.c
@@ -227,6 +227,21 @@ logbase2(int n)
 
 
 /**
+ * Return default texture usage bitmask for the given texture format.
+ */
+static GLuint
+default_usage(enum pipe_format fmt)
+{
+   GLuint usage = PIPE_TEXTURE_USAGE_SAMPLER;
+   if (pf_is_depth_stencil(fmt))
+      usage |= PIPE_TEXTURE_USAGE_DEPTH_STENCIL;
+   else
+      usage |= PIPE_TEXTURE_USAGE_RENDER_TARGET;
+   return usage;
+}
+
+
+/**
  * Allocate a pipe_texture object for the given st_texture_object using
  * the given st_texture_image to guess the mipmap size/levels.
  *
@@ -250,7 +265,7 @@ guess_and_alloc_texture(struct st_context *st,
    GLuint width = stImage->base.Width2;  /* size w/out border */
    GLuint height = stImage->base.Height2;
    GLuint depth = stImage->base.Depth2;
-   GLuint i, comp_byte = 0;
+   GLuint i, comp_byte = 0, usage;
    enum pipe_format fmt;
 
    DBG("%s\n", __FUNCTION__);
@@ -312,6 +327,9 @@ guess_and_alloc_texture(struct st_context *st,
       comp_byte = compressed_num_bytes(stImage->base.TexFormat->MesaFormat);
 
    fmt = st_mesa_format_to_pipe_format(stImage->base.TexFormat->MesaFormat);
+
+   usage = default_usage(fmt);
+
    stObj->pt = st_texture_create(st,
                                  gl_target_to_pipe(stObj->base.Target),
                                  fmt,
@@ -320,10 +338,7 @@ guess_and_alloc_texture(struct st_context *st,
                                  height,
                                  depth,
                                  comp_byte,
-                                 ( (pf_is_depth_stencil(fmt) ?
-                                   PIPE_TEXTURE_USAGE_DEPTH_STENCIL :
-                                   PIPE_TEXTURE_USAGE_RENDER_TARGET) |
-                                   PIPE_TEXTURE_USAGE_SAMPLER ));
+                                 usage);
 
    DBG("%s - success\n", __FUNCTION__);
 }
@@ -1396,6 +1411,8 @@ st_finalize_texture(GLcontext *ctx,
    if (!stObj->pt) {
       const enum pipe_format fmt =
          st_mesa_format_to_pipe_format(firstImage->base.TexFormat->MesaFormat);
+      GLuint usage = default_usage(fmt);
+
       stObj->pt = st_texture_create(ctx->st,
                                     gl_target_to_pipe(stObj->base.Target),
                                     fmt,
@@ -1404,10 +1421,7 @@ st_finalize_texture(GLcontext *ctx,
                                     firstImage->base.Height2,
                                     firstImage->base.Depth2,
                                     comp_byte,
-                                    ( (pf_is_depth_stencil(fmt) ?
-                                      PIPE_TEXTURE_USAGE_DEPTH_STENCIL :
-                                      PIPE_TEXTURE_USAGE_RENDER_TARGET) |
-                                      PIPE_TEXTURE_USAGE_SAMPLER ));
+                                    usage);
 
       if (!stObj->pt) {
          _mesa_error(ctx, GL_OUT_OF_MEMORY, "glTexImage");