add a number of PBO validate/map/unmap functions

Helper functions for (some) drivers, including swrast.

3 files changed, 19 insertions, 79 deletions

diff --git a/src/mesa/swrast/s_bitmap.c b/src/mesa/swrast/s_bitmap.c
index 1e7f6c18e6a..17f639fd557 100644
--- a/src/mesa/swrast/s_bitmap.c
+++ b/src/mesa/swrast/s_bitmap.c
@@ -1,8 +1,8 @@
 /*
  * Mesa 3-D graphics library
- * Version:  6.5.2
+ * Version:  7.1
  *
- * Copyright (C) 1999-2006  Brian Paul   All Rights Reserved.
+ * Copyright (C) 1999-2008  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"),
@@ -57,24 +57,10 @@ _swrast_Bitmap( GLcontext *ctx, GLint px, GLint py,
 
    ASSERT(ctx->RenderMode == GL_RENDER);
 
-   if (unpack->BufferObj->Name) {
-      /* unpack from PBO */
-      GLubyte *buf;
-      if (!_mesa_validate_pbo_access(2, unpack, width, height, 1,
-                                     GL_COLOR_INDEX, GL_BITMAP,
-                                     (GLvoid *) bitmap)) {
-         _mesa_error(ctx, GL_INVALID_OPERATION,"glBitmap(invalid PBO access)");
-         return;
-      }
-      buf = (GLubyte *) ctx->Driver.MapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT,
-                                              GL_READ_ONLY_ARB,
-                                              unpack->BufferObj);
-      if (!buf) {
-         /* buffer is already mapped - that's an error */
-         _mesa_error(ctx, GL_INVALID_OPERATION, "glBitmap(PBO is mapped)");
-         return;
-      }
-      bitmap = ADD_POINTERS(buf, bitmap);
+   bitmap = _mesa_validate_and_map_bitmap_pbo(ctx, width, height,
+                                              unpack, bitmap);
+   if (!bitmap) {
+      return NULL;
    }
 
    RENDER_START(swrast,ctx);
@@ -150,11 +136,7 @@ _swrast_Bitmap( GLcontext *ctx, GLint px, GLint py,
 
    RENDER_FINISH(swrast,ctx);
 
-   if (unpack->BufferObj->Name) {
-      /* done with PBO so unmap it now */
-      ctx->Driver.UnmapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT,
-                              unpack->BufferObj);
-   }
+   _mesa_unmap_bitmap_pbo(ctx, unpack);
 }
 
 
diff --git a/src/mesa/swrast/s_drawpix.c b/src/mesa/swrast/s_drawpix.c
index 4733d10bb59..09ff96fd327 100644
--- a/src/mesa/swrast/s_drawpix.c
+++ b/src/mesa/swrast/s_drawpix.c
@@ -817,7 +817,6 @@ draw_depth_stencil_pixels(GLcontext *ctx, GLint x, GLint y,
 }
 
 
-
 /**
  * Execute software-based glDrawPixels.
  * By time we get here, all error checking will have been done.
@@ -840,27 +839,10 @@ _swrast_DrawPixels( GLcontext *ctx,
    if (swrast->NewState)
       _swrast_validate_derived( ctx );
 
-   if (unpack->BufferObj->Name) {
-      /* unpack from PBO */
-      GLubyte *buf;
-      if (!_mesa_validate_pbo_access(2, unpack, width, height, 1,
-                                     format, type, pixels)) {
-         _mesa_error(ctx, GL_INVALID_OPERATION,
-                     "glDrawPixels(invalid PBO access)");
-         RENDER_FINISH(swrast, ctx);
-	 return;
-      }
-      buf = (GLubyte *) ctx->Driver.MapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT,
-                                              GL_READ_ONLY_ARB,
-                                              unpack->BufferObj);
-      if (!buf) {
-         /* buffer is already mapped - that's an error */
-         _mesa_error(ctx, GL_INVALID_OPERATION, "glDrawPixels(PBO is mapped)");
-         RENDER_FINISH(swrast, ctx);
-	 return;
-      }
-      pixels = ADD_POINTERS(buf, pixels);
-   }
+    pixels = _mesa_validate_and_map_drawpix_pbo(ctx, width, height,
+                                                format, type, unpack, pixels);
+    if (!pixels)
+       return;
 
    switch (format) {
    case GL_STENCIL_INDEX:
@@ -899,11 +881,7 @@ _swrast_DrawPixels( GLcontext *ctx,
 
    RENDER_FINISH(swrast,ctx);
 
-   if (unpack->BufferObj->Name) {
-      /* done with PBO so unmap it now */
-      ctx->Driver.UnmapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT,
-                              unpack->BufferObj);
-   }
+   _mesa_unmap_drapix_pbo(ctx, unpack);
 }
 
 
diff --git a/src/mesa/swrast/s_readpix.c b/src/mesa/swrast/s_readpix.c
index 8df15c8704e..050506b0d05 100644
--- a/src/mesa/swrast/s_readpix.c
+++ b/src/mesa/swrast/s_readpix.c
@@ -574,28 +574,12 @@ _swrast_ReadPixels( GLcontext *ctx,
       return;
    }
 
-   if (clippedPacking.BufferObj->Name) {
-      /* pack into PBO */
-      GLubyte *buf;
-      if (!_mesa_validate_pbo_access(2, &clippedPacking, width, height, 1,
-                                     format, type, pixels)) {
-         _mesa_error(ctx, GL_INVALID_OPERATION,
-                     "glReadPixels(invalid PBO access)");
-	 RENDER_FINISH(swrast, ctx);
-	 return;
-      }
-      buf = (GLubyte *) ctx->Driver.MapBuffer(ctx, GL_PIXEL_PACK_BUFFER_EXT,
-                                              GL_WRITE_ONLY_ARB,
-                                              clippedPacking.BufferObj);
-      if (!buf) {
-         /* buffer is already mapped - that's an error */
-         _mesa_error(ctx, GL_INVALID_OPERATION, "glReadPixels(PBO is mapped)");
-	 RENDER_FINISH(swrast, ctx);
-	 return;
-      }
-      pixels = ADD_POINTERS(buf, pixels);
-   }
-
+    pixels = _mesa_validate_and_map_readpix_pbo(ctx, x, y, width, height,
+                                                format, type,
+                                                &clippedPacking, pixels);
+    if (!pixels)
+       return;
+  
    switch (format) {
       case GL_COLOR_INDEX:
          read_index_pixels(ctx, x, y, width, height, type, pixels,
@@ -634,9 +618,5 @@ _swrast_ReadPixels( GLcontext *ctx,
 
    RENDER_FINISH(swrast, ctx);
 
-   if (clippedPacking.BufferObj->Name) {
-      /* done with PBO so unmap it now */
-      ctx->Driver.UnmapBuffer(ctx, GL_PIXEL_PACK_BUFFER_EXT,
-                              clippedPacking.BufferObj);
-   }
+   _mesa_unmap_readpix_pbo(ctx, &clippedPacking);
 }