mga driver, brought over by Jon Smirl

1 files changed, 284 insertions, 0 deletions

diff --git a/src/mesa/drivers/dri/mga/mgaspan.c b/src/mesa/drivers/dri/mga/mgaspan.c
new file mode 100644
index 00000000000..8dc971cfc57
--- /dev/null
+++ b/src/mesa/drivers/dri/mga/mgaspan.c
@@ -0,0 +1,284 @@
+/*
+ * Copyright 2000-2001 VA Linux Systems, Inc.
+ * 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
+ * VA LINUX SYSTEMS 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]>
+ */
+/* $XFree86: xc/lib/GL/mesa/src/drv/mga/mgaspan.c,v 1.11 2002/10/30 12:51:36 alanh Exp $ */
+
+#include "mtypes.h"
+#include "mgadd.h"
+#include "mgacontext.h"
+#include "mgaspan.h"
+#include "mgaioctl.h"
+#include "swrast/swrast.h"
+
+#define DBG 0
+
+
+#define LOCAL_VARS					\
+   __DRIdrawablePrivate *dPriv = mmesa->driDrawable;	\
+   mgaScreenPrivate *mgaScreen = mmesa->mgaScreen;	\
+   __DRIscreenPrivate *sPriv = mmesa->driScreen;	\
+   GLuint pitch = mgaScreen->frontPitch;		\
+   GLuint height = dPriv->h;				\
+   char *read_buf = (char *)(sPriv->pFB +		\
+			mmesa->readOffset +		\
+			dPriv->x * mgaScreen->cpp +	\
+			dPriv->y * pitch);		\
+   char *buf = (char *)(sPriv->pFB +			\
+			mmesa->drawOffset +		\
+			dPriv->x * mgaScreen->cpp +	\
+			dPriv->y * pitch);		\
+   GLuint p;						\
+   (void) read_buf; (void) buf; (void) p
+   
+
+
+#define LOCAL_DEPTH_VARS						\
+   __DRIdrawablePrivate *dPriv = mmesa->driDrawable;			\
+   mgaScreenPrivate *mgaScreen = mmesa->mgaScreen;			\
+   __DRIscreenPrivate *sPriv = mmesa->driScreen;			\
+   GLuint pitch = mgaScreen->frontPitch;				\
+   GLuint height = dPriv->h;						\
+   char *buf = (char *)(sPriv->pFB +					\
+			mgaScreen->depthOffset +			\
+			dPriv->x * mgaScreen->cpp +			\
+			dPriv->y * pitch)
+
+#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 HW_LOCK()				\
+   mgaContextPtr mmesa = MGA_CONTEXT(ctx);	\
+   FLUSH_BATCH(mmesa);				\
+   LOCK_HARDWARE_QUIESCENT(mmesa);
+
+
+#define HW_CLIPLOOP()						\
+  do {								\
+    int _nc = mmesa->numClipRects;				\
+    while (_nc--) {						\
+       int minx = mmesa->pClipRects[_nc].x1 - mmesa->drawX;	\
+       int miny = mmesa->pClipRects[_nc].y1 - mmesa->drawY;	\
+       int maxx = mmesa->pClipRects[_nc].x2 - mmesa->drawX;	\
+       int maxy = mmesa->pClipRects[_nc].y2 - mmesa->drawY;
+
+#define HW_ENDCLIPLOOP()			\
+    }						\
+  } while (0)
+
+#define HW_UNLOCK()				\
+    UNLOCK_HARDWARE(mmesa);
+
+
+
+
+
+
+
+/* 16 bit, 565 rgb color spanline and pixel functions
+ */
+#define Y_FLIP(_y) (height - _y - 1)
+
+#undef INIT_MONO_PIXEL
+#define INIT_MONO_PIXEL(p, color) \
+  p = MGAPACKCOLOR565( 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 >> 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) mga##x##_565
+#include "spantmp.h"
+
+
+
+
+
+/* 32 bit, 8888 argb color spanline and pixel functions
+ */
+
+#undef INIT_MONO_PIXEL
+#define INIT_MONO_PIXEL(p, color) \
+  p = MGAPACKCOLOR8888( color[0], color[1], color[2], color[3] )
+
+
+#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] = 0xff;						\
+    } while (0)
+
+#define TAG(x) mga##x##_8888
+#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) mga##x##_16
+#include "depthtmp.h"
+
+
+
+
+/* 32 bit depthbuffer functions.
+ */
+#define WRITE_DEPTH( _x, _y, d )	\
+   *(GLuint *)(buf + _x*4 + _y*pitch) = d;
+
+#define READ_DEPTH( d, _x, _y )		\
+   d = *(GLuint *)(buf + _x*4 + _y*pitch);
+
+#define TAG(x) mga##x##_32
+#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 &= 0xff;						\
+   tmp |= (d) << 8;					\
+   *(GLuint *)(buf + _x*4 + _y*pitch) = tmp;		\
+}
+
+#define READ_DEPTH( d, _x, _y )	{				\
+   d = (*(GLuint *)(buf + _x*4 + _y*pitch) & ~0xff) >> 8;	\
+}
+
+#define TAG(x) mga##x##_24_8
+#include "depthtmp.h"
+
+#define WRITE_STENCIL( _x, _y, d ) {			\
+   GLuint tmp = *(GLuint *)(buf + _x*4 + _y*pitch);	\
+   tmp &= 0xffffff00;					\
+   tmp |= d & 0xff;					\
+   *(GLuint *)(buf + _x*4 + _y*pitch) = tmp;		\
+}
+
+#define READ_STENCIL( d, _x, _y )		\
+   d = *(GLuint *)(buf + _x*4 + _y*pitch) & 0xff;
+
+#define TAG(x) mga##x##_24_8
+#include "stenciltmp.h"
+
+
+
+void mgaDDInitSpanFuncs( GLcontext *ctx )
+{
+   mgaContextPtr mmesa = MGA_CONTEXT(ctx);
+   struct swrast_device_driver *swdd = _swrast_GetDeviceDriverReference(ctx);
+
+   switch (mmesa->mgaScreen->cpp) {
+   case 2:
+      swdd->WriteRGBASpan = mgaWriteRGBASpan_565;
+      swdd->WriteRGBSpan = mgaWriteRGBSpan_565;
+      swdd->WriteMonoRGBASpan = mgaWriteMonoRGBASpan_565;
+      swdd->WriteRGBAPixels = mgaWriteRGBAPixels_565;
+      swdd->WriteMonoRGBAPixels = mgaWriteMonoRGBAPixels_565;
+      swdd->ReadRGBASpan = mgaReadRGBASpan_565;
+      swdd->ReadRGBAPixels = mgaReadRGBAPixels_565;
+
+      swdd->ReadDepthSpan = mgaReadDepthSpan_16;
+      swdd->WriteDepthSpan = mgaWriteDepthSpan_16;
+      swdd->ReadDepthPixels = mgaReadDepthPixels_16;
+      swdd->WriteDepthPixels = mgaWriteDepthPixels_16;
+      break;
+
+   case 4:
+      swdd->WriteRGBASpan = mgaWriteRGBASpan_8888;
+      swdd->WriteRGBSpan = mgaWriteRGBSpan_8888;
+      swdd->WriteMonoRGBASpan = mgaWriteMonoRGBASpan_8888;
+      swdd->WriteRGBAPixels = mgaWriteRGBAPixels_8888;
+      swdd->WriteMonoRGBAPixels = mgaWriteMonoRGBAPixels_8888;
+      swdd->ReadRGBASpan = mgaReadRGBASpan_8888;
+      swdd->ReadRGBAPixels = mgaReadRGBAPixels_8888;
+      
+      if (!mmesa->hw_stencil) {
+	 swdd->ReadDepthSpan = mgaReadDepthSpan_32;
+	 swdd->WriteDepthSpan = mgaWriteDepthSpan_32;
+	 swdd->ReadDepthPixels = mgaReadDepthPixels_32;
+	 swdd->WriteDepthPixels = mgaWriteDepthPixels_32;
+      } else {
+	 swdd->ReadDepthSpan = mgaReadDepthSpan_24_8;
+	 swdd->WriteDepthSpan = mgaWriteDepthSpan_24_8;
+	 swdd->ReadDepthPixels = mgaReadDepthPixels_24_8;
+	 swdd->WriteDepthPixels = mgaWriteDepthPixels_24_8;
+
+	 swdd->ReadStencilSpan = mgaReadStencilSpan_24_8;
+	 swdd->WriteStencilSpan = mgaWriteStencilSpan_24_8;
+	 swdd->ReadStencilPixels = mgaReadStencilPixels_24_8;
+	 swdd->WriteStencilPixels = mgaWriteStencilPixels_24_8;
+      }
+      break;
+   }
+}