/*
* 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 <keith@tungstengraphics.com>
*/
/* $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->mesa_drawable; \
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->mesa_drawable; \
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);
#define Y_FLIP(_y) (height - _y - 1)
/* 16 bit, RGB565 color spanline and pixel functions
*/
#define GET_SRC_PTR(_x, _y) (read_buf + _x * 2 + _y * pitch)
#define GET_DST_PTR(_x, _y) ( buf + _x * 2 + _y * pitch)
#define SPANTMP_PIXEL_FMT GL_RGB
#define SPANTMP_PIXEL_TYPE GL_UNSIGNED_SHORT_5_6_5
#define TAG(x) mga##x##_565
#define TAG2(x,y) mga##x##_565##y
#include "spantmp2.h"
/* 32 bit, ARGB8888 color spanline and pixel functions
*/
#define GET_SRC_PTR(_x, _y) (read_buf + _x * 4 + _y * pitch)
#define GET_DST_PTR(_x, _y) ( buf + _x * 4 + _y * pitch)
#define SPANTMP_PIXEL_FMT GL_BGRA
#define SPANTMP_PIXEL_TYPE GL_UNSIGNED_INT_8_8_8_8_REV
#define TAG(x) mga##x##_8888
#define TAG2(x,y) mga##x##_8888##y
#include "spantmp2.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"
/*
* 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 mgaDDSetBuffer(GLcontext *ctx, GLframebuffer *buffer,
GLuint bufferBit)
{
mgaContextPtr mmesa = MGA_CONTEXT(ctx);
unsigned int offset;
assert((bufferBit == DD_FRONT_LEFT_BIT) || (bufferBit == DD_BACK_LEFT_BIT));
offset = (bufferBit == DD_FRONT_LEFT_BIT)
? mmesa->mgaScreen->frontOffset
: mmesa->mgaScreen->backOffset;
mmesa->drawOffset = offset;
mmesa->readOffset = offset;
assert( (buffer == mmesa->driDrawable->driverPrivate)
|| (buffer == mmesa->driReadable->driverPrivate) );
mmesa->mesa_drawable = (buffer == mmesa->driDrawable->driverPrivate)
? mmesa->driDrawable : mmesa->driReadable;
}
/**
* Initialize the driver callbacks for the read / write span functions.
*
* \bug
* To really support RGB888 and RGBA8888 visuals, we need separate read and
* write routines for 888 and 8888. We also need to determine whether or not
* the visual has destination alpha.
*/
void mgaDDInitSpanFuncs( GLcontext *ctx )
{
mgaContextPtr mmesa = MGA_CONTEXT(ctx);
struct swrast_device_driver *swdd = _swrast_GetDeviceDriverReference(ctx);
swdd->SetBuffer = mgaDDSetBuffer;
switch (mmesa->mgaScreen->cpp) {
case 2:
mgaInitPointers_565( swdd );
swdd->ReadDepthSpan = mgaReadDepthSpan_16;
swdd->WriteDepthSpan = mgaWriteDepthSpan_16;
swdd->ReadDepthPixels = mgaReadDepthPixels_16;
swdd->WriteDepthPixels = mgaWriteDepthPixels_16;
break;
case 4:
mgaInitPointers_8888( swdd );
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;
}
}