path: root/src/mesa/drivers/dri/r128/r128_span.c

/**************************************************************************

Copyright 1999, 2000 ATI Technologies Inc. and Precision Insight, Inc.,
                                               Cedar Park, Texas.
All Rights Reserved.

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**************************************************************************/

/*
 * 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_span.h"

#include "swrast/swrast.h"

#define DBG 0

#define HAVE_HW_DEPTH_SPANS	1
#define HAVE_HW_DEPTH_PIXELS	1
#define HAVE_HW_STENCIL_SPANS	1
#define HAVE_HW_STENCIL_PIXELS	1

#define LOCAL_VARS							\
   r128ContextPtr rmesa = R128_CONTEXT(ctx);				\
   __DRIscreen *sPriv = rmesa->driScreen;			\
   __DRIdrawable *dPriv = rmesa->driDrawable;			\
   driRenderbuffer *drb = (driRenderbuffer *) rb;			\
   GLuint height = dPriv->h;						\
   GLuint p;								\
   (void) p;

#define LOCAL_DEPTH_VARS						\
   r128ContextPtr rmesa = R128_CONTEXT(ctx);				\
   r128ScreenPtr r128scrn = rmesa->r128Screen;				\
   __DRIscreen *sPriv = rmesa->driScreen;			\
   __DRIdrawable *dPriv = rmesa->driDrawable;			\
   GLuint height = dPriv->h;						\
   (void) r128scrn; (void) sPriv; (void) height

#define LOCAL_STENCIL_VARS	LOCAL_DEPTH_VARS

#define Y_FLIP( _y )		(height - _y - 1)

#define HW_LOCK()

#define HW_UNLOCK()



/* ================================================================
 * Color buffer
 */

/* 16 bit, RGB565 color spanline and pixel functions
 */
#define SPANTMP_PIXEL_FMT GL_RGB
#define SPANTMP_PIXEL_TYPE GL_UNSIGNED_SHORT_5_6_5

#define TAG(x)    r128##x##_RGB565
#define TAG2(x,y) r128##x##_RGB565##y
#define GET_PTR(X,Y) (sPriv->pFB + drb->flippedOffset		\
     + ((dPriv->y + (Y)) * drb->flippedPitch + (dPriv->x + (X))) * drb->cpp)
#include "spantmp2.h"


/* 32 bit, ARGB8888 color spanline and pixel functions
 */
#define SPANTMP_PIXEL_FMT GL_BGRA
#define SPANTMP_PIXEL_TYPE GL_UNSIGNED_INT_8_8_8_8_REV

#define TAG(x)    r128##x##_ARGB8888
#define TAG2(x,y) r128##x##_ARGB8888##y
#define GET_PTR(X,Y) (sPriv->pFB + drb->flippedOffset		\
     + ((dPriv->y + (Y)) * drb->flippedPitch + (dPriv->x + (X))) * drb->cpp)
#include "spantmp2.h"

/* Idling in the depth/stencil span functions:
 * For writes, the kernel reads from the given user-space buffer at dispatch
 * time, and then writes to the depth buffer asynchronously.
 * For reads, the kernel reads from the depth buffer and writes to the span
 * temporary asynchronously.
 * So, if we're going to read from the span temporary, we need to idle before
 * doing so.  But we don't need to idle after write, because the CPU won't
 * be accessing the destination, only the accelerator (through 3d rendering or
 * depth span reads)
 * However, due to interactions from pixel cache between 2d (what we do with
 * depth) and 3d (all other parts of the system), we idle at the begin and end
 * of a set of span operations, which should cover the pix cache issue.
 * Except, we still have major issues, as shown by no_rast=true glxgears, or
 * stencilwrap.
 */

/* ================================================================
 * Depth buffer
 */

/* These functions require locking */
#undef HW_LOCK
#undef HW_UNLOCK
#define HW_LOCK()    LOCK_HARDWARE(R128_CONTEXT(ctx));
#define HW_UNLOCK()  UNLOCK_HARDWARE(R128_CONTEXT(ctx));

/* 16-bit depth buffer functions
 */
#define VALUE_TYPE GLushort

#define WRITE_DEPTH_SPAN()						\
do {									\
   r128WriteDepthSpanLocked( rmesa, n,					\
			     x + dPriv->x,				\
			     y + dPriv->y,				\
			     depth, mask );				\
} while (0)

#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;						\
      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[128];							\
      GLint oy[128];							\
      GLint count;							\
									\
      if ( remaining <= 128 ) {						\
	 count = remaining;						\
      } else {								\
	 count = 128;							\
      }									\
      for ( i = 0 ; i < count ; i++ ) {					\
	 ox[i] = x[i] + dPriv->x;					\
	 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##_z16
#include "depthtmp.h"


/* 24-bit depth, 8-bit stencil buffer functions
 */
#define VALUE_TYPE GLuint

#define WRITE_DEPTH_SPAN()						\
do {									\
   GLuint buf[n];							\
   GLint i;								\
   GLuint *readbuf = (GLuint *)((GLubyte *)sPriv->pFB +			\
				r128scrn->spanOffset);			\
   r128ReadDepthSpanLocked( rmesa, n,					\
			    x + dPriv->x,				\
			    y + dPriv->y );				\
   r128WaitForIdleLocked( rmesa );					\
   for ( i = 0 ; i < n ; i++ ) {					\
      buf[i] = (readbuf[i] & 0xff000000) | (depth[i] & 0x00ffffff);	\
   }									\
   r128WriteDepthSpanLocked( rmesa, n,					\
			     x + dPriv->x,				\
			     y + dPriv->y,				\
			     buf, mask );				\
} while (0)

#define WRITE_DEPTH_PIXELS()						\
do {									\
   GLuint buf[n];							\
   GLint ox[MAX_WIDTH];							\
   GLint oy[MAX_WIDTH];							\
   GLuint *readbuf = (GLuint *)((GLubyte *)sPriv->pFB +			\
				r128scrn->spanOffset);			\
   for ( i = 0 ; i < n ; i++ ) {					\
      ox[i] = x[i] + dPriv->x;						\
      oy[i] = Y_FLIP( y[i] ) + dPriv->y;				\
   }									\
   r128ReadDepthPixelsLocked( rmesa, n, ox, oy );			\
   r128WaitForIdleLocked( rmesa );					\
   for ( i = 0 ; i < n ; i++ ) {					\
      buf[i] = (readbuf[i] & 0xff000000) | (depth[i] & 0x00ffffff);	\
   }									\
   r128WriteDepthPixelsLocked( rmesa, n, ox, oy, buf, mask );		\
} while (0)

#define READ_DEPTH_SPAN()						\
do {									\
   GLuint *buf = (GLuint *)((GLubyte *)sPriv->pFB +			\
			    r128scrn->spanOffset);			\
   GLint i;								\
									\
   /*if (n >= 128) fprintf(stderr, "Large number of pixels: %d\n", n);*/	\
   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[128];							\
      GLint oy[128];							\
      GLint count;							\
									\
      if ( remaining <= 128 ) {						\
	 count = remaining;						\
      } else {								\
	 count = 128;							\
      }									\
      for ( i = 0 ; i < count ; i++ ) {					\
	 ox[i] = x[i] + dPriv->x;					\
	 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##_z24_s8
#include "depthtmp.h"



/* ================================================================
 * Stencil buffer
 */

/* 24 bit depth, 8 bit stencil depthbuffer functions
 */
#define WRITE_STENCIL_SPAN()						\
do {									\
   GLuint buf[n];							\
   GLint i;								\
   GLuint *readbuf = (GLuint *)((GLubyte *)sPriv->pFB +			\
				r128scrn->spanOffset);			\
   r128ReadDepthSpanLocked( rmesa, n,					\
			    x + dPriv->x,				\
			    y + dPriv->y );				\
   r128WaitForIdleLocked( rmesa );					\
   for ( i = 0 ; i < n ; i++ ) {					\
      buf[i] = (readbuf[i] & 0x00ffffff) | (stencil[i] << 24);		\
   }									\
   r128WriteDepthSpanLocked( rmesa, n,					\
			     x + dPriv->x,				\
			     y + dPriv->y,				\
			     buf, mask );				\
} while (0)

#define WRITE_STENCIL_PIXELS()						\
do {									\
   GLuint buf[n];							\
   GLint ox[MAX_WIDTH];							\
   GLint oy[MAX_WIDTH];							\
   GLuint *readbuf = (GLuint *)((GLubyte *)sPriv->pFB +			\
				r128scrn->spanOffset);			\
   for ( i = 0 ; i < n ; i++ ) {					\
      ox[i] = x[i] + dPriv->x;						\
      oy[i] = Y_FLIP( y[i] ) + dPriv->y;				\
   }									\
   r128ReadDepthPixelsLocked( rmesa, n, ox, oy );			\
   r128WaitForIdleLocked( rmesa );					\
   for ( i = 0 ; i < n ; i++ ) {					\
      buf[i] = (readbuf[i] & 0x00ffffff) | (stencil[i] << 24);		\
   }									\
   r128WriteDepthPixelsLocked( rmesa, n, ox, oy, buf, mask );		\
} while (0)

#define READ_STENCIL_SPAN()						\
do {									\
   GLuint *buf = (GLuint *)((GLubyte *)sPriv->pFB +			\
			    r128scrn->spanOffset);			\
   GLint i;								\
									\
   /*if (n >= 128) fprintf(stderr, "Large number of pixels: %d\n", n);*/	\
   r128ReadDepthSpanLocked( rmesa, n,					\
			    x + dPriv->x,				\
			    y + dPriv->y );				\
   r128WaitForIdleLocked( rmesa );					\
									\
   for ( i = 0 ; i < n ; i++ ) {					\
      stencil[i] = (buf[i] & 0xff000000) >> 24;				\
   }									\
} while (0)

#define READ_STENCIL_PIXELS()						\
do {									\
   GLuint *buf = (GLuint *)((GLubyte *)sPriv->pFB +			\
			    r128scrn->spanOffset);			\
   GLint i, remaining = n;						\
									\
   while ( remaining > 0 ) {						\
      GLint ox[128];							\
      GLint oy[128];							\
      GLint count;							\
									\
      if ( remaining <= 128 ) {						\
	 count = remaining;						\
      } else {								\
	 count = 128;							\
      }									\
      for ( i = 0 ; i < count ; i++ ) {					\
	 ox[i] = x[i] + dPriv->x;					\
	 oy[i] = Y_FLIP( y[i] ) + dPriv->y;				\
      }									\
									\
      r128ReadDepthPixelsLocked( rmesa, count, ox, oy );		\
      r128WaitForIdleLocked( rmesa );					\
									\
      for ( i = 0 ; i < count ; i++ ) {					\
	 stencil[i] = (buf[i] & 0xff000000) >> 24;			\
      }									\
      stencil += count;							\
      x += count;							\
      y += count;							\
      remaining -= count;						\
   }									\
} while (0)

#define TAG(x) radeon##x##_z24_s8
#include "stenciltmp.h"

static void
r128SpanRenderStart( struct gl_context *ctx )
{
   r128ContextPtr rmesa = R128_CONTEXT(ctx);
   FLUSH_BATCH(rmesa);
   LOCK_HARDWARE(rmesa);
   r128WaitForIdleLocked( rmesa );
}

static void
r128SpanRenderFinish( struct gl_context *ctx )
{
   r128ContextPtr rmesa = R128_CONTEXT(ctx);
   _swrast_flush( ctx );
   r128WaitForIdleLocked( rmesa );
   UNLOCK_HARDWARE( rmesa );
}

void r128DDInitSpanFuncs( struct gl_context *ctx )
{
   struct swrast_device_driver *swdd = _swrast_GetDeviceDriverReference(ctx);
   swdd->SpanRenderStart	= r128SpanRenderStart;
   swdd->SpanRenderFinish	= r128SpanRenderFinish;
}


/**
 * Plug in the Get/Put routines for the given driRenderbuffer.
 */
void
r128SetSpanFunctions(driRenderbuffer *drb, const struct gl_config *vis)
{
   if (drb->Base.Format == MESA_FORMAT_RGB565) {
      r128InitPointers_RGB565(&drb->Base);
   }
   else if (drb->Base.Format == MESA_FORMAT_ARGB8888) {
      r128InitPointers_ARGB8888(&drb->Base);
   }
   else if (drb->Base.Format == MESA_FORMAT_Z16) {
      r128InitDepthPointers_z16(&drb->Base);
   }
   else if (drb->Base.Format == MESA_FORMAT_S8_Z24) {
      r128InitDepthPointers_z24_s8(&drb->Base);
   }
   else if (drb->Base.Format == MESA_FORMAT_S8) {
      radeonInitStencilPointers_z24_s8(&drb->Base);
   }
}