From 1a1cf7ed75d799bbda34399ddab7949b8c06686e Mon Sep 17 00:00:00 2001
From: Brian Paul <brian.paul@tungstengraphics.com>
Date: Thu, 4 May 2000 13:48:49 +0000
Subject: implemented GL_EXT_histogram extension

---
 src/mesa/main/image.c | 32 ++++++++++++++++++++++----------
 1 file changed, 22 insertions(+), 10 deletions(-)

(limited to 'src/mesa/main/image.c')

diff --git a/src/mesa/main/image.c b/src/mesa/main/image.c
index b16f030..23c5b77 100644
--- a/src/mesa/main/image.c
+++ b/src/mesa/main/image.c
@@ -1,4 +1,4 @@
-/* $Id: image.c,v 1.29 2000/04/18 14:32:10 brianp Exp $ */
+/* $Id: image.c,v 1.30 2000/05/04 13:48:49 brianp Exp $ */
 
 /*
  * Mesa 3-D graphics library
@@ -615,7 +615,8 @@ _mesa_pack_rgba_span( GLcontext *ctx,
                         ctx->Pixel.ScaleOrBiasRGBApcm ||
                         ctx->Pixel.ColorTableEnabled ||
                         ctx->Pixel.PostColorMatrixColorTableEnabled ||
-                        ctx->Pixel.MinMaxEnabled);
+                        ctx->Pixel.MinMaxEnabled ||
+                        ctx->Pixel.HistogramEnabled);
 
    /* Test for optimized case first */
    if (!applyTransferOps && format == GL_RGBA && type == GL_UNSIGNED_BYTE) {
@@ -680,10 +681,13 @@ _mesa_pack_rgba_span( GLcontext *ctx,
          if (ctx->Pixel.PostColorMatrixColorTableEnabled) {
             _mesa_lookup_rgba(&ctx->PostColorMatrixColorTable, n, rgba);
          }
-         /* XXX histogram here */
+         /* update histogram count */
+         if (ctx->Pixel.HistogramEnabled) {
+            _mesa_update_histogram(ctx, n, (CONST GLfloat (*)[4]) rgba);
+         }
          /* XXX min/max here */
          if (ctx->Pixel.MinMaxEnabled) {
-            _mesa_update_minmax(ctx, n, (const GLfloat (*)[4]) rgba);
+            _mesa_update_minmax(ctx, n, (CONST GLfloat (*)[4]) rgba);
             if (ctx->MinMax.Sink)
                return;
          }
@@ -2194,7 +2198,8 @@ _mesa_unpack_ubyte_color_span( GLcontext *ctx,
                         ctx->Pixel.ScaleOrBiasRGBApcm ||
                         ctx->Pixel.ColorTableEnabled ||
                         ctx->Pixel.PostColorMatrixColorTableEnabled ||
-                        ctx->Pixel.MinMaxEnabled);
+                        ctx->Pixel.MinMaxEnabled ||
+                        ctx->Pixel.HistogramEnabled);
 
    /* Try simple cases first */
    if (!applyTransferOps && srcType == GL_UNSIGNED_BYTE) {
@@ -2320,10 +2325,13 @@ _mesa_unpack_ubyte_color_span( GLcontext *ctx,
          if (ctx->Pixel.PostColorMatrixColorTableEnabled) {
             _mesa_lookup_rgba(&ctx->PostColorMatrixColorTable, n, rgba);
          }
-         /* XXX histogram here */
+         /* update histogram count */
+         if (ctx->Pixel.HistogramEnabled) {
+            _mesa_update_histogram(ctx, n, (CONST GLfloat (*)[4]) rgba);
+         }
          /* XXX min/max here */
          if (ctx->Pixel.MinMaxEnabled) {
-            _mesa_update_minmax(ctx, n, (const GLfloat (*)[4]) rgba);
+            _mesa_update_minmax(ctx, n, (CONST GLfloat (*)[4]) rgba);
          }
       }
 
@@ -2505,7 +2513,8 @@ _mesa_unpack_float_color_span( GLcontext *ctx,
                         ctx->Pixel.ScaleOrBiasRGBApcm ||
                         ctx->Pixel.ColorTableEnabled ||
                         ctx->Pixel.PostColorMatrixColorTableEnabled ||
-                        ctx->Pixel.MinMaxEnabled);
+                        ctx->Pixel.MinMaxEnabled ||
+                        ctx->Pixel.HistogramEnabled);
 
    /* general solution, no special cases, yet */
    {
@@ -2581,10 +2590,13 @@ _mesa_unpack_float_color_span( GLcontext *ctx,
          if (ctx->Pixel.PostColorMatrixColorTableEnabled) {
             _mesa_lookup_rgba(&ctx->PostColorMatrixColorTable, n, rgba);
          }
-         /* XXX histogram here */
+         /* update histogram count */
+         if (ctx->Pixel.HistogramEnabled) {
+            _mesa_update_histogram(ctx, n, (CONST GLfloat (*)[4]) rgba);
+         }
          /* XXX min/max here */
          if (ctx->Pixel.MinMaxEnabled) {
-            _mesa_update_minmax(ctx, n, (const GLfloat (*)[4]) rgba);
+            _mesa_update_minmax(ctx, n, (CONST GLfloat (*)[4]) rgba);
          }
       }
 
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