Reroute some clear functionality.

Still require the intelClear() call to flush batchbuffers.  That will be
removed later...

8 files changed, 125 insertions, 182 deletions

diff --git a/src/mesa/drivers/dri/i915pipe/intel_buffers.c b/src/mesa/drivers/dri/i915pipe/intel_buffers.c
index e39220fe47e..5e68a869bfd 100644
--- a/src/mesa/drivers/dri/i915pipe/intel_buffers.c
+++ b/src/mesa/drivers/dri/i915pipe/intel_buffers.c
@@ -295,110 +295,14 @@ intelWindowMoved(struct intel_context *intel)
 
 
 
-/**
- * Called by ctx->Driver.Clear.
- * XXX NO LONGER USED - REMOVE IN NEAR FUTURE
- */
-#if 0
-static void
-intelClear(GLcontext *ctx, GLbitfield mask)
-#else
-static void
-OLD_intelClear(struct pipe_context *pipe,
-           GLboolean color, GLboolean depth,
-           GLboolean stencil, GLboolean accum)
-#endif
-{
-   GLcontext *ctx = (GLcontext *) pipe->glctx;
-   const GLuint colorMask = *((GLuint *) & ctx->Color.ColorMask);
-   GLbitfield tri_mask = 0;
-   GLbitfield blit_mask = 0;
-   GLbitfield swrast_mask = 0;
-   struct gl_framebuffer *fb = ctx->DrawBuffer;
-   GLuint i;
-
-   GLbitfield mask;
-
-   if (color)
-      mask = ctx->DrawBuffer->_ColorDrawBufferMask[0]; /*XXX temporary*/
-   else
-      mask = 0x0;
-
-   if (0)
-      fprintf(stderr, "%s\n", __FUNCTION__);
-
-   /* HW color buffers (front, back, aux, generic FBO, etc) */
-   if (colorMask == ~0) {
-      /* clear all R,G,B,A */
-      /* XXX FBO: need to check if colorbuffers are software RBOs! */
-      blit_mask |= (mask & BUFFER_BITS_COLOR);
-   }
-   else {
-      /* glColorMask in effect */
-      tri_mask |= (mask & BUFFER_BITS_COLOR);
-   }
-
-   /* HW stencil */
-   if (stencil) {
-      const struct pipe_region *stencilRegion
-         = intel_get_rb_region(fb, BUFFER_STENCIL);
-      if (stencilRegion) {
-         /* have hw stencil */
-         if ((ctx->Stencil.WriteMask[0] & 0xff) != 0xff) {
-            /* not clearing all stencil bits, so use triangle clearing */
-            tri_mask |= BUFFER_BIT_STENCIL;
-         }
-         else {
-            /* clearing all stencil bits, use blitting */
-            blit_mask |= BUFFER_BIT_STENCIL;
-         }
-      }
-   }
-
-   /* HW depth */
-   if (depth) {
-      /* clear depth with whatever method is used for stencil (see above) */
-      if (tri_mask & BUFFER_BIT_STENCIL)
-         tri_mask |= BUFFER_BIT_DEPTH;
-      else
-         blit_mask |= BUFFER_BIT_DEPTH;
-   }
-
-   /* SW fallback clearing */
-   swrast_mask = mask & ~tri_mask & ~blit_mask;
-
-   for (i = 0; i < BUFFER_COUNT; i++) {
-      GLuint bufBit = 1 << i;
-      if ((blit_mask | tri_mask) & bufBit) {
-         if (!fb->Attachment[i].Renderbuffer->ClassID) {
-            blit_mask &= ~bufBit;
-            tri_mask &= ~bufBit;
-            swrast_mask |= bufBit;
-         }
-      }
-   }
-
-
-   intelFlush(ctx);             /* XXX intelClearWithBlit also does this */
-
-   if (blit_mask)
-      intelClearWithBlit(ctx, blit_mask);
-
-#if 0
-   if (swrast_mask | tri_mask)
-      _swrast_Clear(ctx, swrast_mask | tri_mask);
-#else
-   softpipe_clear(pipe, GL_FALSE,
-                  (swrast_mask | tri_mask) & BUFFER_BIT_DEPTH,
-                  (swrast_mask | tri_mask) & BUFFER_BIT_STENCIL,
-                  (swrast_mask | tri_mask) & BUFFER_BIT_ACCUM);
-#endif
-}
-
 
-/**
- * Clear buffers.  Called via pipe->clear().
- */
+/* XXX - kludge required because softpipe_clear uses
+ * region->fill(), which still calls intelBlit(!), but doesn't
+ * flush the batchbuffer.  
+ *
+    * One way or another, that behaviour should stop, and then this
+    * function can go aawy.
+    */
 void
 intelClear(struct pipe_context *pipe,
            GLboolean color, GLboolean depth,
@@ -407,19 +311,9 @@ intelClear(struct pipe_context *pipe,
    GLcontext *ctx = (GLcontext *) pipe->glctx;
    struct intel_context *intel = intel_context(ctx);
 
-   /* XXX
-    * Examine stencil and color writemasks to determine if we can clear
-    * with blits.
-    */
-
-   intelFlush(&intel->ctx);
-   LOCK_HARDWARE(intel);
-
    softpipe_clear(pipe, color, depth, stencil, accum);
 
    intel_batchbuffer_flush(intel->batch);
-
-   UNLOCK_HARDWARE(intel);
 }
 
 
diff --git a/src/mesa/drivers/dri/i915pipe/intel_context.c b/src/mesa/drivers/dri/i915pipe/intel_context.c
index be8235d7d11..0fc24c3b5a9 100644
--- a/src/mesa/drivers/dri/i915pipe/intel_context.c
+++ b/src/mesa/drivers/dri/i915pipe/intel_context.c
@@ -417,7 +417,12 @@ intelCreateContext(const __GLcontextModes * mesaVis,
     */
    st_create_context( &intel->ctx,
 		      softpipe_create() );
-   
+
+   /* KW: Not sure I like this - we should only be talking to the
+    * state_tracker.  The pipe code will need some way of talking to
+    * us, eg for batchbuffer ioctls, and there will need to be a
+    * buffer manager interface.  So, this is a temporary hack, right?
+    */
    intel->pipe = intel->ctx.st->pipe;
    intel->pipe->screen = intelScreen;
    intel->pipe->glctx = ctx;
diff --git a/src/mesa/main/buffers.c b/src/mesa/main/buffers.c
index bb019b5998a..eea443c03cc 100644
--- a/src/mesa/main/buffers.c
+++ b/src/mesa/main/buffers.c
@@ -178,15 +178,7 @@ _mesa_Clear( GLbitfield mask )
       }
 
       ASSERT(ctx->Driver.Clear);
-#if 0
       ctx->Driver.Clear(ctx, bufferMask);
-#else
-      st_clear(ctx->st, 
-               (mask & GL_COLOR_BUFFER_BIT) ? GL_TRUE : GL_FALSE,
-               (bufferMask & BUFFER_BIT_DEPTH) ? GL_TRUE : GL_FALSE,
-               (bufferMask & BUFFER_BIT_STENCIL) ? GL_TRUE : GL_FALSE,
-               (bufferMask & BUFFER_BIT_ACCUM) ? GL_TRUE : GL_FALSE);
-#endif                     
    }
 }
 
diff --git a/src/mesa/pipe/softpipe/sp_clear.c b/src/mesa/pipe/softpipe/sp_clear.c
index a133b488918..09cc643003c 100644
--- a/src/mesa/pipe/softpipe/sp_clear.c
+++ b/src/mesa/pipe/softpipe/sp_clear.c
@@ -60,53 +60,20 @@ color_value(GLuint format, const GLfloat color[4])
    }
 }
  
-static GLuint
-color_mask(GLuint format, GLuint pipeMask)
-{
-   GLuint mask = 0x0;
-   switch (format) {
-   case PIPE_FORMAT_U_R8_G8_B8_A8:
-      if (pipeMask & PIPE_MASK_R)  mask |= 0xff000000;
-      if (pipeMask & PIPE_MASK_G)  mask |= 0x00ff0000;
-      if (pipeMask & PIPE_MASK_B)  mask |= 0x0000ff00;
-      if (pipeMask & PIPE_MASK_A)  mask |= 0x000000ff;
-      break;
-   case PIPE_FORMAT_U_A8_R8_G8_B8:
-      if (pipeMask & PIPE_MASK_R)  mask |= 0x00ff0000;
-      if (pipeMask & PIPE_MASK_G)  mask |= 0x0000ff00;
-      if (pipeMask & PIPE_MASK_B)  mask |= 0x000000ff;
-      if (pipeMask & PIPE_MASK_A)  mask |= 0xff000000;
-      break;
-   case PIPE_FORMAT_U_R5_G6_B5:
-      if (pipeMask & PIPE_MASK_R)  mask |= 0xf800;
-      if (pipeMask & PIPE_MASK_G)  mask |= 0x07e0;
-      if (pipeMask & PIPE_MASK_B)  mask |= 0x001f;
-      if (pipeMask & PIPE_MASK_A)  mask |= 0;
-      break;
-   default:
-      return 0;
-   }
-   return mask;
-}
 
-
-/**
- * XXX This should probaby be renamed to something like pipe_clear_with_blits()
- * and moved into a device-independent pipe file.
- */
 void
 softpipe_clear(struct pipe_context *pipe, GLboolean color, GLboolean depth,
                GLboolean stencil, GLboolean accum)
 {
-   const struct softpipe_context *softpipe = softpipe_context(pipe);
+   struct softpipe_context *softpipe = softpipe_context(pipe);
    GLint x, y, w, h;
 
-   softpipe_update_derived(softpipe);
+   softpipe_update_derived(softpipe); /* not needed?? */
 
-   x = softpipe->cliprect.minx;
-   y = softpipe->cliprect.miny;
-   w = softpipe->cliprect.maxx - x;
-   h = softpipe->cliprect.maxy - y;
+   x = 0;
+   y = 0;
+   w = softpipe->framebuffer.cbufs[0]->width;
+   h = softpipe->framebuffer.cbufs[0]->height;
 
    if (color) {
       GLuint i;
@@ -114,8 +81,7 @@ softpipe_clear(struct pipe_context *pipe, GLboolean color, GLboolean depth,
          struct pipe_surface *ps = softpipe->framebuffer.cbufs[i];
          GLuint clearVal = color_value(ps->format,
                                        softpipe->clear_color.color);
-         GLuint mask = color_mask(ps->format, softpipe->blend.colormask);
-         pipe->region_fill(pipe, ps->region, 0, x, y, w, h, clearVal, mask);
+         pipe->region_fill(pipe, ps->region, 0, x, y, w, h, clearVal, ~0);
       }
    }
 
@@ -124,10 +90,13 @@ softpipe_clear(struct pipe_context *pipe, GLboolean color, GLboolean depth,
       /* clear Z and stencil together */
       struct pipe_surface *ps = softpipe->framebuffer.zbuf;
       if (ps->format == PIPE_FORMAT_S8_Z24) {
-         GLuint mask = (softpipe->stencil.write_mask[0] << 8) | 0xffffff;
+         GLuint mask = (softpipe->stencil.write_mask[0] << 8) | 0xffffff;	 
          GLuint clearVal = (GLuint) (softpipe->depth_test.clear * 0xffffff);
+
+	 assert (mask == ~0);
+
          clearVal |= (softpipe->stencil.clear_value << 24);
-         pipe->region_fill(pipe, ps->region, 0, x, y, w, h, clearVal, mask);
+         pipe->region_fill(pipe, ps->region, 0, x, y, w, h, clearVal, ~0);
       }
       else {
          /* XXX Z24_S8 format? */
@@ -138,33 +107,36 @@ softpipe_clear(struct pipe_context *pipe, GLboolean color, GLboolean depth,
       /* separate Z and stencil */
       if (depth) {
          struct pipe_surface *ps = softpipe->framebuffer.zbuf;
-         GLuint mask, clearVal;
+         GLuint clearVal;
 
          switch (ps->format) {
          case PIPE_FORMAT_U_Z16:
             clearVal = (GLuint) (softpipe->depth_test.clear * 65535.0);
-            mask = 0xffff;
             break;
          case PIPE_FORMAT_U_Z32:
             clearVal = (GLuint) (softpipe->depth_test.clear * 0xffffffff);
-            mask = 0xffffffff;
             break;
          case PIPE_FORMAT_S8_Z24:
             clearVal = (GLuint) (softpipe->depth_test.clear * 0xffffff);
-            mask = 0xffffff;
             break;
          default:
             assert(0);
          }
 
-         pipe->region_fill(pipe, ps->region, 0, x, y, w, h, clearVal, mask);
+         pipe->region_fill(pipe, ps->region, 0, x, y, w, h, clearVal, ~0);
       }
 
       if (stencil) {
          struct pipe_surface *ps = softpipe->framebuffer.sbuf;
          GLuint clearVal = softpipe->stencil.clear_value;
+
+	 /* If this is not ~0, we shouldn't get here - clear should be
+	  * done with geometry instead.
+	  */
          GLuint mask = softpipe->stencil.write_mask[0];
 
+	 assert((mask & 0xff) == 0xff);
+
          switch (ps->format) {
          case PIPE_FORMAT_S8_Z24:
             clearVal = clearVal << 24;
@@ -187,7 +159,7 @@ softpipe_clear(struct pipe_context *pipe, GLboolean color, GLboolean depth,
        */
       struct pipe_surface *ps = softpipe->framebuffer.abuf;
       GLuint clearVal = 0x0; /* XXX FIX */
-      GLuint mask = !0;
+      GLuint mask = ~0;
       assert(ps);
       pipe->region_fill(pipe, ps->region, 0, x, y, w, h, clearVal, mask);
    }
diff --git a/src/mesa/sources b/src/mesa/sources
index d9ee7266e54..d0fe3a979f7 100644
--- a/src/mesa/sources
+++ b/src/mesa/sources
@@ -191,6 +191,7 @@ STATETRACKER_SOURCES = \
 	state_tracker/st_atom_stencil.c \
 	state_tracker/st_atom_stipple.c \
 	state_tracker/st_atom_viewport.c \
+	state_tracker/st_cb_clear.c \
 	state_tracker/st_cb_program.c \
 	state_tracker/st_draw.c \
 	state_tracker/st_context.c \
diff --git a/src/mesa/state_tracker/st_cb_clear.c b/src/mesa/state_tracker/st_cb_clear.c
new file mode 100644
index 00000000000..d9cb83b8ad2
--- /dev/null
+++ b/src/mesa/state_tracker/st_cb_clear.c
@@ -0,0 +1,89 @@
+/**************************************************************************
+ * 
+ * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * 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"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sub license, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ * 
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
+ * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ * 
+ **************************************************************************/
+
+ /*
+  * Authors:
+  *   Keith Whitwell <[email protected]>
+  *   Brian Paul
+  */
+
+#include "st_context.h"
+#include "glheader.h"
+#include "macros.h"
+#include "enums.h"
+#include "st_context.h"
+#include "st_atom.h"
+#include "pipe/p_context.h"
+
+
+
+/* XXX: doesn't pick up the differences between front/back/left/right
+ * clears.  Need to sort that out...
+ */
+static void st_clear(GLcontext *ctx, GLbitfield mask)
+{
+   struct st_context *st = ctx->st;
+   GLboolean color = (mask & BUFFER_BITS_COLOR) ? GL_TRUE : GL_FALSE;
+   GLboolean depth = (mask & BUFFER_BIT_DEPTH) ? GL_TRUE : GL_FALSE;
+   GLboolean stencil = (mask & BUFFER_BIT_STENCIL) ? GL_TRUE : GL_FALSE;
+   GLboolean accum = (mask & BUFFER_BIT_ACCUM) ? GL_TRUE : GL_FALSE;
+   GLboolean fullscreen = 1;	/* :-) */
+
+   /* This makes sure the softpipe has the latest scissor, etc values */
+   st_validate_state( st );
+
+   if (fullscreen) {
+      /* pipe->clear() should clear a particular surface, so that we
+       * can iterate over render buffers at this level and clear the
+       * ones GL is asking for.  
+       *
+       * Will probably need something like pipe->clear_z_stencil() to
+       * cope with the special case of paired and unpaired z/stencil
+       * buffers, though could perhaps deal with them explicitly at
+       * this level.
+       */
+      st->pipe->clear(st->pipe, color, depth, stencil, accum);
+   }
+   else {
+      /* Convert to geometry, etc:
+       */
+   }
+}
+
+
+void st_init_cb_clear( struct st_context *st )
+{
+   struct dd_function_table *functions = &st->ctx->Driver;
+
+   functions->Clear = st_clear;
+}
+
+
+void st_destroy_cb_clear( struct st_context *st )
+{
+}
+
diff --git a/src/mesa/state_tracker/st_context.c b/src/mesa/state_tracker/st_context.c
index 6308e81a619..4d3f0ec4d30 100644
--- a/src/mesa/state_tracker/st_context.c
+++ b/src/mesa/state_tracker/st_context.c
@@ -58,6 +58,7 @@ struct st_context *st_create_context( GLcontext *ctx,
    st_init_atoms( st );
    st_init_draw( st );
    st_init_cb_program( st );
+   st_init_cb_clear( st );
 
    return st;
 }
diff --git a/src/mesa/state_tracker/st_draw.c b/src/mesa/state_tracker/st_draw.c
index a424d1dd050..95fa43df4da 100644
--- a/src/mesa/state_tracker/st_draw.c
+++ b/src/mesa/state_tracker/st_draw.c
@@ -107,14 +107,3 @@ void st_destroy_draw( struct st_context *st )
 }
 
 
-/** XXX temporary here */
-void
-st_clear(struct st_context *st, GLboolean color, GLboolean depth,
-         GLboolean stencil, GLboolean accum)
-{
-   /* This makes sure the softpipe has the latest scissor, etc values */
-   st_validate_state( st );
-
-   st->pipe->clear(st->pipe, color, depth, stencil, accum);
-}
-