patch to import Jon Smirl's work from Bitkeeper

1 files changed, 475 insertions, 0 deletions

diff --git a/src/mesa/drivers/dri/r128/r128_span.c b/src/mesa/drivers/dri/r128/r128_span.c
new file mode 100644
index 0000000000..c6f3195942
--- /dev/null
+++ b/src/mesa/drivers/dri/r128/r128_span.c
@@ -0,0 +1,475 @@
+/* $XFree86: xc/lib/GL/mesa/src/drv/r128/r128_span.c,v 1.8 2002/10/30 12:51:39 alanh Exp $ */
+/**************************************************************************
+
+Copyright 1999, 2000 ATI Technologies Inc. and Precision Insight, 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
+on 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
+ATI, PRECISION INSIGHT AND/OR THEIR 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:
+ *   Gareth Hughes <gareth@valinux.com>
+ *   Keith Whitwell <keith@tungstengraphics.com>
+ *   Kevin E. Martin <martin@valinux.com>
+ *
+ */
+
+#include "r128_context.h"
+#include "r128_ioctl.h"
+#include "r128_state.h"
+#include "r128_span.h"
+#include "r128_tex.h"
+
+#include "swrast/swrast.h"
+
+#define DBG 0
+
+#define HAVE_HW_DEPTH_SPANS	1
+#define HAVE_HW_DEPTH_PIXELS	1
+
+#define LOCAL_VARS							\
+   r128ContextPtr rmesa = R128_CONTEXT(ctx);				\
+   r128ScreenPtr r128scrn = rmesa->r128Screen;				\
+   __DRIscreenPrivate *sPriv = rmesa->driScreen;			\
+   __DRIdrawablePrivate *dPriv = rmesa->driDrawable;			\
+   GLuint pitch = r128scrn->frontPitch * r128scrn->cpp;			\
+   GLuint height = dPriv->h;						\
+   char *buf = (char *)(sPriv->pFB +					\
+			rmesa->drawOffset +				\
+			(dPriv->x * r128scrn->cpp) +			\
+			(dPriv->y * pitch));				\
+   char *read_buf = (char *)(sPriv->pFB +				\
+			     rmesa->readOffset +			\
+			     (dPriv->x * r128scrn->cpp) +		\
+			     (dPriv->y * pitch));			\
+   GLuint p;								\
+   (void) read_buf; (void) buf; (void) p
+
+#define LOCAL_DEPTH_VARS						\
+   r128ContextPtr rmesa = R128_CONTEXT(ctx);				\
+   r128ScreenPtr r128scrn = rmesa->r128Screen;				\
+   __DRIscreenPrivate *sPriv = rmesa->driScreen;			\
+   __DRIdrawablePrivate *dPriv = rmesa->driDrawable;			\
+   GLuint height = dPriv->h;						\
+   (void) r128scrn; (void) sPriv; (void) height
+
+#define LOCAL_STENCIL_VARS	LOCAL_DEPTH_VARS
+
+
+#define CLIPPIXEL( _x, _y )						\
+   ((_x >= minx) && (_x < maxx) && (_y >= miny) && (_y < maxy))
+
+
+#define CLIPSPAN( _x, _y, _n, _x1, _n1, _i )				\
+   if ( _y < miny || _y >= maxy ) {					\
+      _n1 = 0, _x1 = x;							\
+   } else {								\
+      _n1 = _n;								\
+      _x1 = _x;								\
+      if ( _x1 < minx ) _i += (minx-_x1), n1 -= (minx-_x1), _x1 = minx; \
+      if ( _x1 + _n1 >= maxx ) n1 -= (_x1 + n1 - maxx);		        \
+   }
+
+#define Y_FLIP( _y )		(height - _y - 1)
+
+
+#define HW_LOCK()							\
+   r128ContextPtr rmesa = R128_CONTEXT(ctx);				\
+   FLUSH_BATCH( rmesa );						\
+   LOCK_HARDWARE( rmesa );						\
+   r128WaitForIdleLocked( rmesa );
+
+#define HW_CLIPLOOP()							\
+   do {									\
+      __DRIdrawablePrivate *dPriv = rmesa->driDrawable;			\
+      int _nc = dPriv->numClipRects;					\
+									\
+      while ( _nc-- ) {							\
+	 int minx = dPriv->pClipRects[_nc].x1 - dPriv->x;		\
+	 int miny = dPriv->pClipRects[_nc].y1 - dPriv->y;		\
+	 int maxx = dPriv->pClipRects[_nc].x2 - dPriv->x;		\
+	 int maxy = dPriv->pClipRects[_nc].y2 - dPriv->y;
+
+#define HW_ENDCLIPLOOP()						\
+      }									\
+   } while (0)
+
+#define HW_UNLOCK()							\
+   UNLOCK_HARDWARE( rmesa )
+
+
+
+/* ================================================================
+ * Color buffer
+ */
+
+/* 16 bit, RGB565 color spanline and pixel functions
+ */
+#undef INIT_MONO_PIXEL
+#define INIT_MONO_PIXEL(p, color) \
+  p = R128PACKCOLOR565( color[0], color[1], color[2] )
+
+#define WRITE_RGBA( _x, _y, r, g, b, a )				\
+   *(GLushort *)(buf + _x*2 + _y*pitch) = ((((int)r & 0xf8) << 8) |	\
+					   (((int)g & 0xfc) << 3) |	\
+					   (((int)b & 0xf8) >> 3))
+
+#define WRITE_PIXEL( _x, _y, p )					\
+   *(GLushort *)(buf + _x*2 + _y*pitch) = p
+
+#define READ_RGBA( rgba, _x, _y )					\
+   do {									\
+      GLushort p = *(GLushort *)(read_buf + _x*2 + _y*pitch);		\
+      rgba[0] = (p >> 8) & 0xf8;					\
+      rgba[1] = (p >> 3) & 0xfc;					\
+      rgba[2] = (p << 3) & 0xf8;					\
+      rgba[3] = 0xff;							\
+      if ( rgba[0] & 0x08 ) rgba[0] |= 0x07;				\
+      if ( rgba[1] & 0x04 ) rgba[1] |= 0x03;				\
+      if ( rgba[2] & 0x08 ) rgba[2] |= 0x07;				\
+   } while (0)
+
+#define TAG(x) r128##x##_RGB565
+#include "spantmp.h"
+
+#define READ_DEPTH(d, _x, _y)                                                 \
+    d = *(GLushort *)(buf + _x*2 + _y*pitch)
+
+/* 32 bit, ARGB8888 color spanline and pixel functions
+ */
+#undef INIT_MONO_PIXEL
+#define INIT_MONO_PIXEL(p, color) \
+  p = R128PACKCOLOR8888( color[0], color[1], color[2], color[3] )
+
+#define WRITE_RGBA( _x, _y, r, g, b, a )				\
+   *(GLuint *)(buf + _x*4 + _y*pitch) = ((b <<  0) |			\
+					 (g <<  8) |			\
+					 (r << 16) |			\
+					 (a << 24) )
+
+#define WRITE_PIXEL( _x, _y, p )					\
+   *(GLuint *)(buf + _x*4 + _y*pitch) = p
+
+#define READ_RGBA( rgba, _x, _y )					\
+do {									\
+   GLuint p = *(GLuint *)(read_buf + _x*4 + _y*pitch);			\
+   rgba[0] = (p >> 16) & 0xff;						\
+   rgba[1] = (p >>  8) & 0xff;						\
+   rgba[2] = (p >>  0) & 0xff;						\
+   rgba[3] = 0xff;/*(p >> 24) & 0xff;*/						\
+} while (0)
+
+#define TAG(x) r128##x##_ARGB8888
+#include "spantmp.h"
+
+
+/* 24 bit, RGB888 color spanline and pixel functions */
+#undef INIT_MONO_PIXEL
+#define INIT_MONO_PIXEL(p, color) \
+  p = R128PACKCOLOR888( color[0], color[1], color[2] )
+
+#define WRITE_RGBA(_x, _y, r, g, b, a)                                        \
+    *(GLuint *)(buf + _x*3 + _y*pitch) = ((r << 16) |                         \
+					  (g << 8)  |                         \
+					  (b << 0))
+
+#define WRITE_PIXEL(_x, _y, p)                                                \
+    *(GLuint *)(buf + _x*3 + _y*pitch) = p
+
+#define READ_RGBA(rgba, _x, _y)                                               \
+    do {                                                                      \
+	GLuint p = *(GLuint *)(read_buf + _x*3 + _y*pitch);                   \
+	rgba[0] = (p >> 16) & 0xff;                                           \
+	rgba[1] = (p >> 8)  & 0xff;                                           \
+	rgba[2] = (p >> 0)  & 0xff;                                           \
+	rgba[3] = 0xff;                                                       \
+    } while (0)
+
+/* ================================================================
+ * Depth buffer
+ */
+
+/* 16-bit depth buffer functions
+ */
+#define WRITE_DEPTH_SPAN()						\
+   r128WriteDepthSpanLocked( rmesa, n,					\
+			     x + dPriv->x,				\
+			     y + dPriv->y,				\
+			     depth, mask );
+
+#define WRITE_DEPTH_PIXELS()						\
+do {									\
+   GLint ox[MAX_WIDTH];							\
+   GLint oy[MAX_WIDTH];							\
+   for ( i = 0 ; i < n ; i++ ) {					\
+      ox[i] = x[i] + dPriv->x;						\
+   }									\
+   for ( i = 0 ; i < n ; i++ ) {					\
+      oy[i] = Y_FLIP( y[i] ) + dPriv->y;				\
+   }									\
+   r128WriteDepthPixelsLocked( rmesa, n, ox, oy, depth, mask );		\
+} while (0)
+
+#define READ_DEPTH_SPAN()						\
+do {									\
+   GLushort *buf = (GLushort *)((GLubyte *)sPriv->pFB +			\
+				r128scrn->spanOffset);			\
+   GLint i;								\
+									\
+   r128ReadDepthSpanLocked( rmesa, n,					\
+			    x + dPriv->x,				\
+			    y + dPriv->y );				\
+   r128WaitForIdleLocked( rmesa );					\
+									\
+   for ( i = 0 ; i < n ; i++ ) {					\
+      depth[i] = buf[i];						\
+   }									\
+} while (0)
+
+#define READ_DEPTH_PIXELS()						\
+do {									\
+   GLushort *buf = (GLushort *)((GLubyte *)sPriv->pFB +			\
+				r128scrn->spanOffset);			\
+   GLint i, remaining = n;						\
+									\
+   while ( remaining > 0 ) {						\
+      GLint ox[MAX_WIDTH];						\
+      GLint oy[MAX_WIDTH];						\
+      GLint count;							\
+									\
+      if ( remaining <= 128 ) {						\
+	 count = remaining;						\
+      } else {								\
+	 count = 128;							\
+      }									\
+      for ( i = 0 ; i < count ; i++ ) {					\
+	 ox[i] = x[i] + dPriv->x;					\
+      }									\
+      for ( i = 0 ; i < count ; i++ ) {					\
+	 oy[i] = Y_FLIP( y[i] ) + dPriv->y;				\
+      }									\
+									\
+      r128ReadDepthPixelsLocked( rmesa, count, ox, oy );		\
+      r128WaitForIdleLocked( rmesa );					\
+									\
+      for ( i = 0 ; i < count ; i++ ) {					\
+	 depth[i] = buf[i];						\
+      }									\
+      depth += count;							\
+      x += count;							\
+      y += count;							\
+      remaining -= count;						\
+   }									\
+} while (0)
+
+#define TAG(x) r128##x##_16
+#include "depthtmp.h"
+
+
+/* 24-bit depth, 8-bit stencil buffer functions
+ */
+#define WRITE_DEPTH_SPAN()						\
+   r128WriteDepthSpanLocked( rmesa, n,					\
+			     x + dPriv->x,				\
+			     y + dPriv->y,				\
+			     depth, mask );
+
+#define WRITE_DEPTH_PIXELS()						\
+do {									\
+   GLint ox[MAX_WIDTH];							\
+   GLint oy[MAX_WIDTH];							\
+   for ( i = 0 ; i < n ; i++ ) {					\
+      ox[i] = x[i] + dPriv->x;						\
+   }									\
+   for ( i = 0 ; i < n ; i++ ) {					\
+      oy[i] = Y_FLIP( y[i] ) + dPriv->y;				\
+   }									\
+   r128WriteDepthPixelsLocked( rmesa, n, ox, oy, depth, mask );		\
+} while (0)
+
+#define READ_DEPTH_SPAN()						\
+do {									\
+   GLuint *buf = (GLuint *)((GLubyte *)sPriv->pFB +			\
+			    r128scrn->spanOffset);			\
+   GLint i;								\
+									\
+   r128ReadDepthSpanLocked( rmesa, n,					\
+			    x + dPriv->x,				\
+			    y + dPriv->y );				\
+   r128WaitForIdleLocked( rmesa );					\
+									\
+   for ( i = 0 ; i < n ; i++ ) {					\
+      depth[i] = buf[i] & 0x00ffffff;					\
+   }									\
+} while (0)
+
+#define READ_DEPTH_PIXELS()						\
+do {									\
+   GLuint *buf = (GLuint *)((GLubyte *)sPriv->pFB +			\
+			    r128scrn->spanOffset);			\
+   GLint i, remaining = n;						\
+									\
+   while ( remaining > 0 ) {						\
+      GLint ox[MAX_WIDTH];						\
+      GLint oy[MAX_WIDTH];						\
+      GLint count;							\
+									\
+      if ( remaining <= 128 ) {						\
+	 count = remaining;						\
+      } else {								\
+	 count = 128;							\
+      }									\
+      for ( i = 0 ; i < count ; i++ ) {					\
+	 ox[i] = x[i] + dPriv->x;					\
+      }									\
+      for ( i = 0 ; i < count ; i++ ) {					\
+	 oy[i] = Y_FLIP( y[i] ) + dPriv->y;				\
+      }									\
+									\
+      r128ReadDepthPixelsLocked( rmesa, count, ox, oy );		\
+      r128WaitForIdleLocked( rmesa );					\
+									\
+      for ( i = 0 ; i < count ; i++ ) {					\
+	 depth[i] = buf[i] & 0x00ffffff;				\
+      }									\
+      depth += count;							\
+      x += count;							\
+      y += count;							\
+      remaining -= count;						\
+   }									\
+} while (0)
+
+#define TAG(x) r128##x##_24_8
+#include "depthtmp.h"
+
+
+
+/* ================================================================
+ * Stencil buffer
+ */
+
+/* FIXME: Add support for hardware stencil buffers.
+ */
+
+
+/* 32 bit depthbuffer functions */
+#define WRITE_DEPTH(_x, _y, d)                                                \
+    *(GLuint *)(buf + _x*4 + _y*pitch) = d
+
+
+
+/*
+ * This function is called to specify which buffer to read and write
+ * for software rasterization (swrast) fallbacks.  This doesn't necessarily
+ * correspond to glDrawBuffer() or glReadBuffer() calls.
+ */
+static void r128DDSetBuffer( GLcontext *ctx,
+                             GLframebuffer *colorBuffer,
+                             GLuint bufferBit )
+{
+   r128ContextPtr rmesa = R128_CONTEXT(ctx);
+
+   switch ( bufferBit ) {
+   case FRONT_LEFT_BIT:
+      if ( rmesa->sarea->pfCurrentPage == 1 ) {
+         rmesa->drawOffset = rmesa->readOffset = rmesa->r128Screen->backOffset;
+         rmesa->drawPitch  = rmesa->readPitch  = rmesa->r128Screen->backPitch;
+      } else {
+         rmesa->drawOffset = rmesa->readOffset = rmesa->r128Screen->frontOffset;
+         rmesa->drawPitch  = rmesa->readPitch  = rmesa->r128Screen->frontPitch;
+      }
+      break;
+   case BACK_LEFT_BIT:
+      if ( rmesa->sarea->pfCurrentPage == 1 ) {
+         rmesa->drawOffset = rmesa->readOffset = rmesa->r128Screen->frontOffset;
+         rmesa->drawPitch  = rmesa->readPitch  = rmesa->r128Screen->frontPitch;
+      } else {
+         rmesa->drawOffset = rmesa->readOffset = rmesa->r128Screen->backOffset;
+         rmesa->drawPitch  = rmesa->readPitch  = rmesa->r128Screen->backPitch;
+      }
+      break;
+   default:
+      break;
+   }
+}
+
+
+void r128DDInitSpanFuncs( GLcontext *ctx )
+{
+   r128ContextPtr rmesa = R128_CONTEXT(ctx);
+   struct swrast_device_driver *swdd = _swrast_GetDeviceDriverReference(ctx);
+
+   swdd->SetBuffer = r128DDSetBuffer;
+
+   switch ( rmesa->r128Screen->cpp ) {
+   case 2:
+      swdd->WriteRGBASpan	= r128WriteRGBASpan_RGB565;
+      swdd->WriteRGBSpan	= r128WriteRGBSpan_RGB565;
+      swdd->WriteMonoRGBASpan	= r128WriteMonoRGBASpan_RGB565;
+      swdd->WriteRGBAPixels	= r128WriteRGBAPixels_RGB565;
+      swdd->WriteMonoRGBAPixels	= r128WriteMonoRGBAPixels_RGB565;
+      swdd->ReadRGBASpan	= r128ReadRGBASpan_RGB565;
+      swdd->ReadRGBAPixels	= r128ReadRGBAPixels_RGB565;
+      break;
+
+   case 4:
+      swdd->WriteRGBASpan	= r128WriteRGBASpan_ARGB8888;
+      swdd->WriteRGBSpan	= r128WriteRGBSpan_ARGB8888;
+      swdd->WriteMonoRGBASpan	= r128WriteMonoRGBASpan_ARGB8888;
+      swdd->WriteRGBAPixels	= r128WriteRGBAPixels_ARGB8888;
+      swdd->WriteMonoRGBAPixels	= r128WriteMonoRGBAPixels_ARGB8888;
+      swdd->ReadRGBASpan	= r128ReadRGBASpan_ARGB8888;
+      swdd->ReadRGBAPixels	= r128ReadRGBAPixels_ARGB8888;
+      break;
+
+   default:
+      break;
+   }
+
+   switch ( rmesa->glCtx->Visual.depthBits ) {
+   case 16:
+      swdd->ReadDepthSpan	= r128ReadDepthSpan_16;
+      swdd->WriteDepthSpan	= r128WriteDepthSpan_16;
+      swdd->ReadDepthPixels	= r128ReadDepthPixels_16;
+      swdd->WriteDepthPixels	= r128WriteDepthPixels_16;
+      break;
+
+   case 24:
+      swdd->ReadDepthSpan	= r128ReadDepthSpan_24_8;
+      swdd->WriteDepthSpan	= r128WriteDepthSpan_24_8;
+      swdd->ReadDepthPixels	= r128ReadDepthPixels_24_8;
+      swdd->WriteDepthPixels	= r128WriteDepthPixels_24_8;
+      break;
+
+   default:
+      break;
+   }
+
+   swdd->WriteCI8Span		= NULL;
+   swdd->WriteCI32Span		= NULL;
+   swdd->WriteMonoCISpan	= NULL;
+   swdd->WriteCI32Pixels	= NULL;
+   swdd->WriteMonoCIPixels	= NULL;
+   swdd->ReadCI32Span		= NULL;
+   swdd->ReadCI32Pixels		= NULL;
+}