swrast: rewrite glDrawPixels(GL_DEPTH) with zoom

This gets rid of another renderbuffer->PutRow() call and _DepthBuffer
usage.  We always work with 32-bit uint Z values now.

Reviewed-by: Eric Anholt <[email protected]>

1 files changed, 13 insertions, 24 deletions

diff --git a/src/mesa/swrast/s_zoom.c b/src/mesa/swrast/s_zoom.c
index f407fdcf4e6..73bff482b9a 100644
--- a/src/mesa/swrast/s_zoom.c
+++ b/src/mesa/swrast/s_zoom.c
@@ -25,6 +25,7 @@
 #include "main/glheader.h"
 #include "main/macros.h"
 #include "main/imports.h"
+#include "main/format_pack.h"
 #include "main/colormac.h"
 
 #include "s_context.h"
@@ -390,17 +391,17 @@ _swrast_write_zoomed_stencil_span(struct gl_context *ctx, GLint imgX, GLint imgY
 
 
 /**
- * Zoom/write z values (16 or 32-bit).
+ * Zoom/write 32-bit Z values.
  * No per-fragment operations are applied.
  */
 void
 _swrast_write_zoomed_z_span(struct gl_context *ctx, GLint imgX, GLint imgY,
                             GLint width, GLint spanX, GLint spanY,
-                            const GLvoid *z)
+                            const GLuint *zVals)
 {
-   struct gl_renderbuffer *rb = ctx->DrawBuffer->_DepthBuffer;
-   GLushort zoomedVals16[MAX_WIDTH];
-   GLuint zoomedVals32[MAX_WIDTH];
+   struct gl_renderbuffer *rb =
+      ctx->DrawBuffer->Attachment[BUFFER_DEPTH].Renderbuffer;
+   GLuint zoomedVals[MAX_WIDTH];
    GLint x0, x1, y0, y1, y;
    GLint i, zoomedWidth;
 
@@ -414,28 +415,16 @@ _swrast_write_zoomed_z_span(struct gl_context *ctx, GLint imgX, GLint imgY,
    ASSERT(zoomedWidth <= MAX_WIDTH);
 
    /* zoom the span horizontally */
-   if (rb->DataType == GL_UNSIGNED_SHORT) {
-      for (i = 0; i < zoomedWidth; i++) {
-         GLint j = unzoom_x(ctx->Pixel.ZoomX, imgX, x0 + i) - spanX;
-         ASSERT(j >= 0);
-         ASSERT(j < width);
-         zoomedVals16[i] = ((GLushort *) z)[j];
-      }
-      z = zoomedVals16;
-   }
-   else {
-      ASSERT(rb->DataType == GL_UNSIGNED_INT);
-      for (i = 0; i < zoomedWidth; i++) {
-         GLint j = unzoom_x(ctx->Pixel.ZoomX, imgX, x0 + i) - spanX;
-         ASSERT(j >= 0);
-         ASSERT(j < width);
-         zoomedVals32[i] = ((GLuint *) z)[j];
-      }
-      z = zoomedVals32;
+   for (i = 0; i < zoomedWidth; i++) {
+      GLint j = unzoom_x(ctx->Pixel.ZoomX, imgX, x0 + i) - spanX;
+      ASSERT(j >= 0);
+      ASSERT(j < width);
+      zoomedVals[i] = zVals[j];
    }
 
    /* write the zoomed spans */
    for (y = y0; y < y1; y++) {
-      rb->PutRow(ctx, rb, zoomedWidth, x0, y, z, NULL);
+      GLubyte *dst = _swrast_pixel_address(rb, x0, y);
+      _mesa_pack_uint_z_row(rb->Format, zoomedWidth, zoomedVals, dst);
    }
 }