i830_span.c   [plain text]

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

Copyright 2001 VA Linux Systems Inc., Fremont, California.

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/* $XFree86: xc/lib/GL/mesa/src/drv/i830/i830_span.c,v 1.5 2003/09/28 20:15:14 alanh 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; 
}