add the i830 driver - no kernel driver yet

(build tested, but not physically tested)

1 files changed, 370 insertions, 0 deletions

diff --git a/src/mesa/drivers/dri/i830/i830_span.c b/src/mesa/drivers/dri/i830/i830_span.c
new file mode 100644
index 0000000000..34830bf58c
--- /dev/null
+++ b/src/mesa/drivers/dri/i830/i830_span.c
@@ -0,0 +1,370 @@
+/**************************************************************************
+
+Copyright 2001 VA Linux Systems Inc., Fremont, California.
+
+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, VA LINUX SYSTEMS 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.
+
+**************************************************************************/
+
+/* $XFree86: xc/lib/GL/mesa/src/drv/i830/i830_span.c,v 1.4 2002/12/10 01:26:53 dawes Exp $ */
+
+/*
+ * Author:
+ *   Jeff Hartmann <jhartmann@2d3d.com>
+ *
+ * Heavily based on the I810 driver, which was written by:
+ *   Keith Whitwell <keith@tungstengraphics.com>
+ */
+
+#include "glheader.h"
+#include "macros.h"
+#include "mtypes.h"
+#include "colormac.h"
+
+#include "i830_screen.h"
+#include "i830_dri.h"
+
+#include "i830_span.h"
+#include "i830_ioctl.h"
+#include "swrast/swrast.h"
+
+
+#define DBG 0
+
+#define LOCAL_VARS						\
+   i830ContextPtr imesa = I830_CONTEXT(ctx);                    \
+   __DRIdrawablePrivate *dPriv = imesa->driDrawable;		\
+   i830ScreenPrivate *i830Screen = imesa->i830Screen;		\
+   GLuint pitch = i830Screen->backPitch * i830Screen->cpp;	\
+   GLuint height = dPriv->h;					\
+   char *buf = (char *)(imesa->drawMap +			\
+			dPriv->x * i830Screen->cpp +		\
+			dPriv->y * pitch);			\
+   char *read_buf = (char *)(imesa->readMap +			\
+			     dPriv->x * i830Screen->cpp +	\
+			     dPriv->y * pitch); 		\
+   GLushort p;         						\
+   (void) read_buf; (void) buf; (void) p
+
+#define LOCAL_DEPTH_VARS					\
+   i830ContextPtr imesa = I830_CONTEXT(ctx);                    \
+   __DRIdrawablePrivate *dPriv = imesa->driDrawable;		\
+   i830ScreenPrivate *i830Screen = imesa->i830Screen;		\
+   GLuint pitch = i830Screen->backPitch * i830Screen->cpp;	\
+   GLuint height = dPriv->h;					\
+   char *buf = (char *)(i830Screen->depth.map +			\
+			dPriv->x * i830Screen->cpp +		\
+			dPriv->y * pitch)
+
+#define LOCAL_STENCIL_VARS LOCAL_DEPTH_VARS 
+
+#define INIT_MONO_PIXEL(p,color)\
+	 p = PACK_COLOR_565(color[0],color[1],color[2])
+
+#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()
+
+#define HW_CLIPLOOP()						\
+  do {								\
+    __DRIdrawablePrivate *dPriv = imesa->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()
+
+/* 16 bit, 565 rgb color spanline and pixel functions
+ */
+#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 >> 11) & 0x1f) * 255) / 31;			\
+   rgba[1] = (((p >>  5) & 0x3f) * 255) / 63;			\
+   rgba[2] = (((p >>  0) & 0x1f) * 255) / 31;			\
+   rgba[3] = 255;						\
+} while(0)
+
+#define TAG(x) i830##x##_565
+#include "spantmp.h"
+
+
+
+
+/* 15 bit, 555 rgb color spanline and pixel functions
+ */
+#define WRITE_RGBA( _x, _y, r, g, b, a )			\
+   *(GLushort *)(buf + _x*2 + _y*pitch)  = (((r & 0xf8) << 7) |	\
+		                            ((g & 0xf8) << 3) |	\
+                         		    ((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 >> 7) & 0xf8;					\
+   rgba[1] = (p >> 3) & 0xf8;					\
+   rgba[2] = (p << 3) & 0xf8;					\
+   rgba[3] = 255;						\
+} while(0)
+
+#define TAG(x) i830##x##_555
+#include "spantmp.h"
+
+/* 16 bit depthbuffer functions.
+ */
+#define WRITE_DEPTH( _x, _y, d ) \
+   *(GLushort *)(buf + _x*2 + _y*pitch)  = d;
+
+#define READ_DEPTH( d, _x, _y )	\
+   d = *(GLushort *)(buf + _x*2 + _y*pitch);	 
+
+
+#define TAG(x) i830##x##_16
+#include "depthtmp.h"
+
+
+#undef LOCAL_VARS
+#define LOCAL_VARS					\
+   i830ContextPtr imesa = I830_CONTEXT(ctx);                    \
+   __DRIdrawablePrivate *dPriv = imesa->driDrawable;	\
+   i830ScreenPrivate *i830Screen = imesa->i830Screen;	\
+   GLuint pitch = i830Screen->backPitch * i830Screen->cpp;	\
+   GLuint height = dPriv->h;				\
+   char *buf = (char *)(imesa->drawMap +		\
+			dPriv->x * i830Screen->cpp +			\
+			dPriv->y * pitch);		\
+   char *read_buf = (char *)(imesa->readMap +		\
+			     dPriv->x * i830Screen->cpp +		\
+			     dPriv->y * pitch); 	\
+   GLuint p = I830_CONTEXT( ctx )->MonoColor;         \
+   (void) read_buf; (void) buf; (void) p
+
+#undef INIT_MONO_PIXEL
+#define INIT_MONO_PIXEL(p,color)\
+	 p = PACK_COLOR_888(color[0],color[1],color[2])
+
+/* 32 bit, 8888 argb color spanline and pixel functions
+ */
+#define WRITE_RGBA(_x, _y, r, g, b, a)			\
+    *(GLuint *)(buf + _x*4 + _y*pitch) = ((r << 16) |	\
+					  (g << 8)  |	\
+					  (b << 0)  |	\
+					  (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] = (p >> 24) & 0xff;				\
+    } while (0)
+
+#define TAG(x) i830##x##_8888
+#include "spantmp.h"
+
+/* 24 bit depthbuffer functions.
+ */
+#define WRITE_DEPTH( _x, _y, d )	\
+   *(GLuint *)(buf + _x*4 + _y*pitch) = 0xffffff & d;
+
+#define READ_DEPTH( d, _x, _y )		\
+   d = *(GLuint *)(buf + _x*4 + _y*pitch) & 0xffffff;
+
+#define TAG(x) i830##x##_24
+#include "depthtmp.h"
+
+/* 24/8 bit interleaved depth/stencil functions
+ */
+#define WRITE_DEPTH( _x, _y, d ) {			\
+   GLuint tmp = *(GLuint *)(buf + _x*4 + _y*pitch);	\
+   tmp &= 0xff000000;					\
+   tmp |= (d) & 0xffffff;				\
+   *(GLuint *)(buf + _x*4 + _y*pitch) = tmp;		\
+}
+
+#define READ_DEPTH( d, _x, _y )		\
+   d = *(GLuint *)(buf + _x*4 + _y*pitch) & 0xffffff;
+
+
+#define TAG(x) i830##x##_24_8
+#include "depthtmp.h"
+
+#define WRITE_STENCIL( _x, _y, d ) {			\
+   GLuint tmp = *(GLuint *)(buf + _x*4 + _y*pitch);	\
+   tmp &= 0xffffff;					\
+   tmp |= (d<<24);					\
+   *(GLuint *)(buf + _x*4 + _y*pitch) = tmp;		\
+}
+
+#define READ_STENCIL( d, _x, _y )			\
+   d = *(GLuint *)(buf + _x*4 + _y*pitch) >> 24;
+
+#define TAG(x) i830##x##_24_8
+#include "stenciltmp.h"
+
+/*
+ * 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 i830SetBuffer(GLcontext *ctx, GLframebuffer *colorBuffer,
+                          GLuint bufferBit)
+{
+   i830ContextPtr imesa = I830_CONTEXT(ctx);
+   if (bufferBit == FRONT_LEFT_BIT) {
+      imesa->drawMap = (char *)imesa->driScreen->pFB;
+      imesa->readMap = (char *)imesa->driScreen->pFB;
+   } else if (bufferBit == BACK_LEFT_BIT) {
+      imesa->drawMap = imesa->i830Screen->back.map;
+      imesa->readMap = imesa->i830Screen->back.map;
+   } else {
+      ASSERT(0);
+   }
+}
+
+
+
+/* Move locking out to get reasonable span performance.
+ */
+void i830SpanRenderStart( GLcontext *ctx )
+{
+   i830ContextPtr imesa = I830_CONTEXT(ctx);
+   I830_FIREVERTICES(imesa);
+   LOCK_HARDWARE(imesa);
+   i830RegetLockQuiescent( imesa );
+}
+
+void i830SpanRenderFinish( GLcontext *ctx )
+{
+   i830ContextPtr imesa = I830_CONTEXT( ctx );
+   _swrast_flush( ctx );
+   UNLOCK_HARDWARE( imesa );
+}
+
+void i830DDInitSpanFuncs( GLcontext *ctx )
+{
+   i830ContextPtr imesa = I830_CONTEXT(ctx);
+   i830ScreenPrivate *i830Screen = imesa->i830Screen;
+
+   struct swrast_device_driver *swdd = _swrast_GetDeviceDriverReference(ctx);
+
+   swdd->SetBuffer = i830SetBuffer;
+
+   switch (i830Screen->fbFormat) {
+   case DV_PF_555:
+      swdd->WriteRGBASpan = i830WriteRGBASpan_555;
+      swdd->WriteRGBSpan = i830WriteRGBSpan_555;
+      swdd->WriteMonoRGBASpan = i830WriteMonoRGBASpan_555;
+      swdd->WriteRGBAPixels = i830WriteRGBAPixels_555;
+      swdd->WriteMonoRGBAPixels = i830WriteMonoRGBAPixels_555;
+      swdd->ReadRGBASpan = i830ReadRGBASpan_555;
+      swdd->ReadRGBAPixels = i830ReadRGBAPixels_555;
+
+      swdd->ReadDepthSpan = i830ReadDepthSpan_16;
+      swdd->WriteDepthSpan = i830WriteDepthSpan_16;
+      swdd->ReadDepthPixels = i830ReadDepthPixels_16;
+      swdd->WriteDepthPixels = i830WriteDepthPixels_16;
+      break;
+
+   case DV_PF_565:
+      swdd->WriteRGBASpan = i830WriteRGBASpan_565;
+      swdd->WriteRGBSpan = i830WriteRGBSpan_565;
+      swdd->WriteMonoRGBASpan = i830WriteMonoRGBASpan_565;
+      swdd->WriteRGBAPixels = i830WriteRGBAPixels_565;
+      swdd->WriteMonoRGBAPixels = i830WriteMonoRGBAPixels_565; 
+      swdd->ReadRGBASpan = i830ReadRGBASpan_565;
+      swdd->ReadRGBAPixels = i830ReadRGBAPixels_565;
+
+      swdd->ReadDepthSpan = i830ReadDepthSpan_16;
+      swdd->WriteDepthSpan = i830WriteDepthSpan_16;
+      swdd->ReadDepthPixels = i830ReadDepthPixels_16;
+      swdd->WriteDepthPixels = i830WriteDepthPixels_16;
+      break;
+
+   case DV_PF_8888:
+      swdd->WriteRGBASpan = i830WriteRGBASpan_8888;
+      swdd->WriteRGBSpan = i830WriteRGBSpan_8888;
+      swdd->WriteMonoRGBASpan = i830WriteMonoRGBASpan_8888;
+      swdd->WriteRGBAPixels = i830WriteRGBAPixels_8888;
+      swdd->WriteMonoRGBAPixels = i830WriteMonoRGBAPixels_8888;
+      swdd->ReadRGBASpan = i830ReadRGBASpan_8888;
+      swdd->ReadRGBAPixels = i830ReadRGBAPixels_8888;
+
+      if(imesa->hw_stencil) {
+	 swdd->ReadDepthSpan = i830ReadDepthSpan_24_8;
+	 swdd->WriteDepthSpan = i830WriteDepthSpan_24_8;
+	 swdd->ReadDepthPixels = i830ReadDepthPixels_24_8;
+	 swdd->WriteDepthPixels = i830WriteDepthPixels_24_8;
+
+	 swdd->WriteStencilSpan = i830WriteStencilSpan_24_8;
+	 swdd->ReadStencilSpan = i830ReadStencilSpan_24_8;
+	 swdd->WriteStencilPixels = i830WriteStencilPixels_24_8;
+	 swdd->ReadStencilPixels = i830ReadStencilPixels_24_8;
+      } else {
+	 swdd->ReadDepthSpan = i830ReadDepthSpan_24;
+	 swdd->WriteDepthSpan = i830WriteDepthSpan_24;
+	 swdd->ReadDepthPixels = i830ReadDepthPixels_24;
+	 swdd->WriteDepthPixels = i830WriteDepthPixels_24;
+      }
+      break;
+   }
+
+   swdd->SpanRenderStart = i830SpanRenderStart;
+   swdd->SpanRenderFinish = i830SpanRenderFinish; 
+}