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authorBrian <brian@nostromo.localnet.net>2007-01-25 10:51:53 -0700
committerBrian <brian@nostromo.localnet.net>2007-01-25 10:51:53 -0700
commit5ef553da9a0dc9f6d7f01b967082c24849ee4abf (patch)
tree5acddcd685899be3598c469e84e34aad638b53ad /src/mesa/swrast/s_context.h
parente713c21bd09468887faceebcba9a62a406321c07 (diff)
new comments, ideas
Diffstat (limited to 'src/mesa/swrast/s_context.h')
-rw-r--r--src/mesa/swrast/s_context.h43
1 files changed, 22 insertions, 21 deletions
diff --git a/src/mesa/swrast/s_context.h b/src/mesa/swrast/s_context.h
index f784e18cd4..c9f6ec6bb8 100644
--- a/src/mesa/swrast/s_context.h
+++ b/src/mesa/swrast/s_context.h
@@ -86,11 +86,12 @@ struct arrays2 {
#endif
+
/**
* \sw_span_arrays
* \brief Arrays of fragment values.
*
- * These will either be computed from the x/xStep values above or
+ * These will either be computed from the span x/xStep values or
* filled in by glDraw/CopyPixels, etc.
* These arrays are separated out of sw_span to conserve memory.
*/
@@ -114,15 +115,25 @@ typedef struct sw_span_arrays {
GLchan (*rgba)[4];
GLchan (*spec)[4];
- GLuint index[MAX_WIDTH];
- GLint x[MAX_WIDTH]; /**< X/Y used for point/line rendering only */
- GLint y[MAX_WIDTH]; /**< X/Y used for point/line rendering only */
- GLuint z[MAX_WIDTH];
+#if 0
+ /* XXX rearrange and unify these arrays to so that we can
+ * index all fragment inputs with the FRAG_ATTRIB_* values:
+ */
+ GLfloat attribs[FRAG_ATTRIB_MAX][MAX_WIDTH][4];
+ /*OR*/
+ typedef GLfloat (*array4f)[4];
+ array4f attribs[FRAG_ATTRIB_MAX];
+#endif
+
+ GLint x[MAX_WIDTH]; /**< fragment X coords */
+ GLint y[MAX_WIDTH]; /**< fragment Y coords */
+ GLuint z[MAX_WIDTH]; /**< fragment Z coords */
+ GLuint index[MAX_WIDTH]; /**< Color indexes */
GLfloat fog[MAX_WIDTH];
GLfloat texcoords[MAX_TEXTURE_COORD_UNITS][MAX_WIDTH][4];
GLfloat lambda[MAX_TEXTURE_COORD_UNITS][MAX_WIDTH];
- GLfloat coverage[MAX_WIDTH];
- GLfloat varying[MAX_WIDTH][MAX_VARYING][4];
+ GLfloat coverage[MAX_WIDTH]; /**< Fragment coverage for AA/smoothing */
+ GLfloat varying[MAX_VARYING][MAX_WIDTH][4]; /**< For shaders */
/** This mask indicates which fragments are alive or culled */
GLubyte mask[MAX_WIDTH];
@@ -130,21 +141,11 @@ typedef struct sw_span_arrays {
/**
- * \SWspan
- * \brief Contains data for either a horizontal line or a set of
- * pixels that are passed through a pipeline of functions before being
- * drawn.
- *
- * The sw_span structure describes the colors, Z, fogcoord, texcoords,
+ * The SWspan structure describes the colors, Z, fogcoord, texcoords,
* etc for either a horizontal run or an array of independent pixels.
* We can either specify a base/step to indicate interpolated values, or
- * fill in arrays of values. The interpMask and arrayMask bitfields
- * indicate which are active.
- *
- * With this structure it's easy to hand-off span rasterization to
- * subroutines instead of doing it all inline in the triangle functions
- * like we used to do.
- * It also cleans up the local variable namespace a great deal.
+ * fill in explicit arrays of values. The interpMask and arrayMask bitfields
+ * indicate which attributes are active interpolants or arrays, respectively.
*
* It would be interesting to experiment with multiprocessor rasterization
* with this structure. The triangle rasterizer could simply emit a
@@ -225,7 +226,7 @@ typedef struct sw_span {
/**
* We store the arrays of fragment values in a separate struct so
* that we can allocate sw_span structs on the stack without using
- * a lot of memory. The span_arrays struct is about 400KB while the
+ * a lot of memory. The span_arrays struct is about 1.4MB while the
* sw_span struct is only about 512 bytes.
*/
SWspanarrays *array;