aboutsummaryrefslogtreecommitdiff
path: root/mesalib/src/mesa/swrast/s_renderbuffer.c
diff options
context:
space:
mode:
authormarha <marha@users.sourceforge.net>2012-02-13 08:47:19 +0100
committermarha <marha@users.sourceforge.net>2012-02-13 08:47:19 +0100
commiteaa70945cb3f1a432b8c505ecede9ebc7769f36d (patch)
tree8e44ff4da739e384a2c6a34c1b42ecfb8e212344 /mesalib/src/mesa/swrast/s_renderbuffer.c
parent474621addc25cb22865c54b70ffbec07c82eb04c (diff)
downloadvcxsrv-eaa70945cb3f1a432b8c505ecede9ebc7769f36d.tar.gz
vcxsrv-eaa70945cb3f1a432b8c505ecede9ebc7769f36d.tar.bz2
vcxsrv-eaa70945cb3f1a432b8c505ecede9ebc7769f36d.zip
libX11 libxcb mesa xserver mkfontscale git update 13 feb 2012
Diffstat (limited to 'mesalib/src/mesa/swrast/s_renderbuffer.c')
-rw-r--r--mesalib/src/mesa/swrast/s_renderbuffer.c28
1 files changed, 26 insertions, 2 deletions
diff --git a/mesalib/src/mesa/swrast/s_renderbuffer.c b/mesalib/src/mesa/swrast/s_renderbuffer.c
index 637a7b6dc..d8a7467b0 100644
--- a/mesalib/src/mesa/swrast/s_renderbuffer.c
+++ b/mesalib/src/mesa/swrast/s_renderbuffer.c
@@ -615,8 +615,31 @@ unmap_attachment(struct gl_context *ctx,
srb->Map = NULL;
}
-
-
+
+
+/**
+ * Determine what type to use (ubyte vs. float) for span colors for the
+ * given renderbuffer.
+ * See also _swrast_write_rgba_span().
+ */
+static void
+find_renderbuffer_colortype(struct gl_renderbuffer *rb)
+{
+ struct swrast_renderbuffer *srb = swrast_renderbuffer(rb);
+ GLuint rbMaxBits = _mesa_get_format_max_bits(rb->Format);
+ GLenum rbDatatype = _mesa_get_format_datatype(rb->Format);
+
+ if (rbDatatype == GL_UNSIGNED_NORMALIZED && rbMaxBits <= 8) {
+ /* the buffer's values fit in GLubyte values */
+ srb->ColorType = GL_UNSIGNED_BYTE;
+ }
+ else {
+ /* use floats otherwise */
+ srb->ColorType = GL_FLOAT;
+ }
+}
+
+
/**
* Map the renderbuffers we'll use for tri/line/point rendering.
*/
@@ -641,6 +664,7 @@ _swrast_map_renderbuffers(struct gl_context *ctx)
for (buf = 0; buf < fb->_NumColorDrawBuffers; buf++) {
map_attachment(ctx, fb, fb->_ColorDrawBufferIndexes[buf]);
+ find_renderbuffer_colortype(fb->_ColorDrawBuffers[buf]);
}
}