GL_SGI_texture_color_table extension (Eric Plante)

[mesa.git] / src / mesa / swrast / s_drawpix.c

diff --git a/src/mesa/swrast/s_drawpix.c b/src/mesa/swrast/s_drawpix.c
index 479c9cf99f6340d8ecab5eb28c59a9374001294d..a69f3cc3c95bd9e155fb11c626a5db91d0dc61ad 100644 (file)
--- a/src/mesa/swrast/s_drawpix.c
+++ b/src/mesa/swrast/s_drawpix.c
@@ -1,10 +1,10 @@
-/* $Id: s_drawpix.c,v 1.42 2002/12/18 15:02:19 brianp Exp $ */
+/* $Id: s_drawpix.c,v 1.44 2003/01/16 18:57:44 brianp Exp $ */
 
 /*
  * Mesa 3-D graphics library
  * Version:  5.1
  *
- * Copyright (C) 1999-2002  Brian Paul   All Rights Reserved.
+ * Copyright (C) 1999-2003  Brian Paul   All Rights Reserved.
  *
  * Permission is hereby granted, free of charge, to any person obtaining a
  * copy of this software and associated documentation files (the "Software"),
@@ -522,11 +522,11 @@ draw_index_pixels( GLcontext *ctx, GLint x, GLint y,
     */
    skipPixels = 0;
    while (skipPixels < width) {
-      span.x = x + (zoom ? 0 : skipPixels);
-      span.y = y;
-      span.end = (width - skipPixels > MAX_WIDTH)
-               ? MAX_WIDTH : (width - skipPixels);
-      ASSERT(span.end <= MAX_WIDTH);
+      const GLint spanX = x + (zoom ? 0 : skipPixels);
+      GLint spanY = y;
+      const GLint spanEnd = (width - skipPixels > MAX_WIDTH)
+                          ? MAX_WIDTH : (width - skipPixels);
+      ASSERT(spanEnd <= MAX_WIDTH);
       for (row = 0; row < height; row++, span.y++) {
          const GLvoid *source = _mesa_image_address(&ctx->Unpack, pixels,
                                                     width, height,
@@ -535,12 +535,18 @@ draw_index_pixels( GLcontext *ctx, GLint x, GLint y,
          _mesa_unpack_index_span(ctx, span.end, GL_UNSIGNED_INT,
                                  span.array->index, type, source, &ctx->Unpack,
                                  ctx->_ImageTransferState);
+
+         /* These may get changed during writing/clipping */
+         span.x = spanX;
+         span.y = spanY;
+         span.end = spanEnd;
+         
          if (zoom)
             _mesa_write_zoomed_index_span(ctx, &span, y, skipPixels);
          else
             _mesa_write_index_span(ctx, &span);
       }
-      skipPixels += span.end;
+      skipPixels += spanEnd;
    }
 }
 
@@ -578,10 +584,10 @@ draw_stencil_pixels( GLcontext *ctx, GLint x, GLint y,
    /* if width > MAX_WIDTH, have to process image in chunks */
    skipPixels = 0;
    while (skipPixels < width) {
-      GLint spanX = x;
+      const GLint spanX = x;
       GLint spanY = y;
-      GLint spanWidth = (width - skipPixels > MAX_WIDTH)
-                      ? MAX_WIDTH : (width - skipPixels);
+      const GLint spanWidth = (width - skipPixels > MAX_WIDTH)
+                            ? MAX_WIDTH : (width - skipPixels);
 
       for (row = 0; row < height; row++, spanY++) {
          GLstencil values[MAX_WIDTH];
@@ -688,17 +694,25 @@ draw_depth_pixels( GLcontext *ctx, GLint x, GLint y,
 
       /* in case width > MAX_WIDTH do the copy in chunks */
       while (skipPixels < width) {
-         span.x = x + (zoom ? 0 : skipPixels);
-         span.y = y;
-         span.end = (width - skipPixels > MAX_WIDTH)
-                  ? MAX_WIDTH : (width - skipPixels);
+         const GLint spanX = x + (zoom ? 0 : skipPixels);
+         GLint spanY = y;
+         const GLint spanEnd = (width - skipPixels > MAX_WIDTH)
+                             ? MAX_WIDTH : (width - skipPixels);
          ASSERT(span.end <= MAX_WIDTH);
-         for (row = 0; row < height; row++, span.y++) {
+         for (row = 0; row < height; row++, spanY++) {
             GLfloat floatSpan[MAX_WIDTH];
             const GLvoid *src = _mesa_image_address(&ctx->Unpack,
                                                     pixels, width, height,
                                                     GL_DEPTH_COMPONENT, type,
                                                     0, row, skipPixels);
+
+            /* Set these for each row since the _mesa_write_* function may
+             * change them while clipping.
+             */
+            span.x = spanX;
+            span.y = spanY;
+            span.end = spanEnd;
+
             _mesa_unpack_depth_span(ctx, span.end, floatSpan, type,
                                     src, &ctx->Unpack);
             /* clamp depth values to [0,1] and convert from floats to ints */
@@ -725,7 +739,7 @@ draw_depth_pixels( GLcontext *ctx, GLint x, GLint y,
                   _mesa_write_index_span(ctx, &span);
             }
          }
-         skipPixels += span.end;
+         skipPixels += spanEnd;
       }
    }
 }
@@ -832,20 +846,31 @@ draw_rgba_pixels( GLcontext *ctx, GLint x, GLint y,
     * General solution
     */
    {
+      const GLuint interpMask = span.interpMask;
+      const GLuint arrayMask = span.arrayMask;
       GLint row, skipPixels = 0;
 
       /* if the span is wider than MAX_WIDTH we have to do it in chunks */
       while (skipPixels < width) {
-         span.x = x + (zoom ? 0 : skipPixels);
-         span.y = y;
-         span.end = (width - skipPixels > MAX_WIDTH)
-                  ? MAX_WIDTH : (width - skipPixels);
+         const GLint spanX = x + (zoom ? 0 : skipPixels);
+         GLint spanY = y;
+         const GLint spanEnd = (width - skipPixels > MAX_WIDTH)
+                             ? MAX_WIDTH : (width - skipPixels);
          ASSERT(span.end <= MAX_WIDTH);
 
-         for (row = 0; row < height; row++, span.y++) {
+         for (row = 0; row < height; row++, spanY++) {
             const GLvoid *source = _mesa_image_address(unpack,
                      pixels, width, height, format, type, 0, row, skipPixels);
 
+            /* Set these for each row since the _mesa_write_* function may
+             * change them while clipping.
+             */
+            span.x = spanX;
+            span.y = spanY;
+            span.end = spanEnd;
+            span.arrayMask = arrayMask;
+            span.interpMask = interpMask;
+
             _mesa_unpack_chan_color_span(ctx, span.end, GL_RGBA,
                                          (GLchan *) span.array->rgba,
                                          format, type, source, unpack,
@@ -859,6 +884,7 @@ draw_rgba_pixels( GLcontext *ctx, GLint x, GLint y,
                _swrast_pixel_texture(ctx, &span);
             }
 
+            /* draw the span */
             if (quickDraw) {
                (*swrast->Driver.WriteRGBASpan)(ctx, span.end, span.x, span.y,
                                  (CONST GLchan (*)[4]) span.array->rgba, NULL);
@@ -871,7 +897,8 @@ draw_rgba_pixels( GLcontext *ctx, GLint x, GLint y,
                _mesa_write_rgba_span(ctx, &span);
             }
          }
-         skipPixels += span.end;
+
+         skipPixels += spanEnd;
       }
    }