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diff --git a/src/mesa/drivers/dri/tdfx/tdfx_span.c b/src/mesa/drivers/dri/tdfx/tdfx_span.c
new file mode 100644
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+++ b/src/mesa/drivers/dri/tdfx/tdfx_span.c
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+/* -*- mode: c; c-basic-offset: 3 -*-
+ *
+ * Copyright 2000 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
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * 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 NONINFRINGEMENT. IN NO EVENT SHALL
+ * VA LINUX SYSTEMS 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/tdfx/tdfx_span.c,v 1.7 2002/10/30 12:52:00 alanh Exp $ */
+
+/*
+ * Original rewrite:
+ * Gareth Hughes <gareth@valinux.com>, 29 Sep - 1 Oct 2000
+ *
+ * Authors:
+ * Gareth Hughes <gareth@valinux.com>
+ * Brian Paul <brianp@valinux.com>
+ * Keith Whitwell <keith@tungstengraphics.com>
+ *
+ */
+
+#include "tdfx_context.h"
+#include "tdfx_lock.h"
+#include "tdfx_span.h"
+#include "tdfx_render.h"
+#include "swrast/swrast.h"
+
+
+#define DBG 0
+
+
+#define LOCAL_VARS \
+ __DRIdrawablePrivate *dPriv = fxMesa->driDrawable; \
+ tdfxScreenPrivate *fxPriv = fxMesa->fxScreen; \
+ GLuint pitch = (fxMesa->glCtx->Color.DrawBuffer == GL_FRONT) \
+ ? (fxMesa->screen_width * BYTESPERPIXEL) : \
+ (info.strideInBytes); \
+ GLuint height = fxMesa->height; \
+ char *buf = (char *)((char *)info.lfbPtr + \
+ dPriv->x * fxPriv->cpp + \
+ dPriv->y * pitch); \
+ GLuint p; \
+ (void) buf; (void) p;
+
+
+#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_WRITE_LOCK() \
+ tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx); \
+ GrLfbInfo_t info; \
+ FLUSH_BATCH( fxMesa ); \
+ UNLOCK_HARDWARE( fxMesa ); \
+ LOCK_HARDWARE( fxMesa ); \
+ info.size = sizeof(GrLfbInfo_t); \
+ if ( fxMesa->Glide.grLfbLock( GR_LFB_WRITE_ONLY, \
+ fxMesa->DrawBuffer, LFB_MODE, \
+ GR_ORIGIN_UPPER_LEFT, FXFALSE, &info ) ) \
+ {
+
+#define HW_WRITE_UNLOCK() \
+ fxMesa->Glide.grLfbUnlock( GR_LFB_WRITE_ONLY, fxMesa->DrawBuffer );\
+ }
+
+
+#define HW_READ_LOCK() \
+ tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx); \
+ GrLfbInfo_t info; \
+ FLUSH_BATCH( fxMesa ); \
+ UNLOCK_HARDWARE( fxMesa ); \
+ LOCK_HARDWARE( fxMesa ); \
+ info.size = sizeof(GrLfbInfo_t); \
+ if ( fxMesa->Glide.grLfbLock( GR_LFB_READ_ONLY, fxMesa->ReadBuffer, \
+ LFB_MODE, GR_ORIGIN_UPPER_LEFT, FXFALSE, &info ) ) \
+ {
+
+#define HW_READ_UNLOCK() \
+ fxMesa->Glide.grLfbUnlock( GR_LFB_READ_ONLY, fxMesa->ReadBuffer );\
+ }
+
+
+#define HW_WRITE_CLIPLOOP() \
+ do { \
+ int _nc = fxMesa->numClipRects; \
+ while (_nc--) { \
+ int minx = fxMesa->pClipRects[_nc].x1 - fxMesa->x_offset; \
+ int miny = fxMesa->pClipRects[_nc].y1 - fxMesa->y_offset; \
+ int maxx = fxMesa->pClipRects[_nc].x2 - fxMesa->x_offset; \
+ int maxy = fxMesa->pClipRects[_nc].y2 - fxMesa->y_offset;
+
+#define HW_READ_CLIPLOOP() \
+ do { \
+ const __DRIdrawablePrivate *dPriv = fxMesa->driDrawable; \
+ XF86DRIClipRectPtr rect = dPriv->pClipRects; \
+ int _nc = dPriv->numClipRects; \
+ while (_nc--) { \
+ const int minx = rect->x1 - fxMesa->x_offset; \
+ const int miny = rect->y1 - fxMesa->y_offset; \
+ const int maxx = rect->x2 - fxMesa->x_offset; \
+ const int maxy = rect->y2 - fxMesa->y_offset; \
+ rect++;
+
+#define HW_ENDCLIPLOOP() \
+ } \
+ } while (0)
+
+
+
+#define LFB_MODE GR_LFBWRITEMODE_565
+
+
+/* 16 bit, RGB565 color spanline and pixel functions */ \
+
+#undef INIT_MONO_PIXEL
+#define INIT_MONO_PIXEL(p, color) \
+ p = TDFXPACKCOLOR565( 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 *)(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] = 0xff; \
+ } while (0)
+
+#define TAG(x) tdfx##x##_RGB565
+#define BYTESPERPIXEL 2
+#include "spantmp.h"
+#undef BYTESPERPIXEL
+
+
+/* 16 bit, BGR565 color spanline and pixel functions */ \
+#if 0
+
+#define WRITE_RGBA( _x, _y, r, g, b, a ) \
+ *(GLushort *)(buf + _x*2 + _y*pitch) = ((((int)b & 0xf8) << 8) | \
+ (((int)g & 0xfc) << 3) | \
+ (((int)r & 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 *)(buf + _x*2 + _y*pitch); \
+ rgba[0] = (p << 3) & 0xf8; \
+ rgba[1] = (p >> 3) & 0xfc; \
+ rgba[2] = (p >> 8) & 0xf8; \
+ rgba[3] = 0xff; \
+ } while (0)
+
+#define TAG(x) tdfx##x##_BGR565
+#define BYTESPERPIXEL 2
+#include "spantmp.h"
+#undef BYTESPERPIXEL
+#endif
+
+
+#undef LFB_MODE
+#define LFB_MODE GR_LFBWRITEMODE_888
+
+
+/* 24 bit, RGB888 color spanline and pixel functions */
+#undef INIT_MONO_PIXEL
+#define INIT_MONO_PIXEL(p, color) \
+ p = TDFXPACKCOLOR888( color[0], color[1], color[2] )
+
+#define WRITE_RGBA( _x, _y, r, g, b, a ) \
+ *(GLuint *)(buf + _x*3 + _y*pitch) = ((b << 0) | \
+ (g << 8) | \
+ (r << 16))
+
+#define WRITE_PIXEL( _x, _y, p ) \
+ *(GLuint *)(buf + _x*3 + _y*pitch) = p
+
+#define READ_RGBA( rgba, _x, _y ) \
+do { \
+ GLuint p = *(GLuint *)(buf + _x*3 + _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) tdfx##x##_RGB888
+#define BYTESPERPIXEL 4
+#include "spantmp.h"
+#undef BYTESPERPIXEL
+
+
+#undef LFB_MODE
+#define LFB_MODE GR_LFBWRITEMODE_8888
+
+
+/* 32 bit, ARGB8888 color spanline and pixel functions */
+#undef INIT_MONO_PIXEL
+#define INIT_MONO_PIXEL(p, color) \
+ p = TDFXPACKCOLOR8888( color[0], color[1], color[2], color[3] )
+
+#define WRITE_RGBA( _x, _y, r, g, b, a ) \
+ *(GLuint *)(buf + _x*4 + _y*pitch) = ((b << 0) | \
+ (g << 8) | \
+ (r << 16) | \
+ (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 *)(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) tdfx##x##_ARGB8888
+#define BYTESPERPIXEL 4
+#include "spantmp.h"
+#undef BYTESPERPIXEL
+
+
+
+/* ================================================================
+ * Old span functions below...
+ */
+
+
+/*
+ * Examine the cliprects to generate an array of flags to indicate
+ * which pixels in a span are visible. Note: (x,y) is a screen
+ * coordinate.
+ */
+static void
+generate_vismask(const tdfxContextPtr fxMesa, GLint x, GLint y, GLint n,
+ GLubyte vismask[])
+{
+ GLboolean initialized = GL_FALSE;
+ GLint i, j;
+
+ /* Ensure we clear the visual mask */
+ MEMSET(vismask, 0, n);
+
+ /* turn on flags for all visible pixels */
+ for (i = 0; i < fxMesa->numClipRects; i++) {
+ const XF86DRIClipRectPtr rect = &fxMesa->pClipRects[i];
+
+ if (y >= rect->y1 && y < rect->y2) {
+ if (x >= rect->x1 && x + n <= rect->x2) {
+ /* common case, whole span inside cliprect */
+ MEMSET(vismask, 1, n);
+ return;
+ }
+ if (x < rect->x2 && x + n >= rect->x1) {
+ /* some of the span is inside the rect */
+ GLint start, end;
+ if (!initialized) {
+ MEMSET(vismask, 0, n);
+ initialized = GL_TRUE;
+ }
+ if (x < rect->x1)
+ start = rect->x1 - x;
+ else
+ start = 0;
+ if (x + n > rect->x2)
+ end = rect->x2 - x;
+ else
+ end = n;
+ assert(start >= 0);
+ assert(end <= n);
+ for (j = start; j < end; j++)
+ vismask[j] = 1;
+ }
+ }
+ }
+}
+
+/*
+ * Examine cliprects and determine if the given screen pixel is visible.
+ */
+static GLboolean
+visible_pixel(const tdfxContextPtr fxMesa, int scrX, int scrY)
+{
+ int i;
+ for (i = 0; i < fxMesa->numClipRects; i++) {
+ const XF86DRIClipRectPtr rect = &fxMesa->pClipRects[i];
+ if (scrX >= rect->x1 &&
+ scrX < rect->x2 &&
+ scrY >= rect->y1 && scrY < rect->y2) return GL_TRUE;
+ }
+ return GL_FALSE;
+}
+
+
+
+/*
+ * Depth buffer read/write functions.
+ */
+/*
+ * To read the frame buffer, we need to lock and unlock it. The
+ * four macros {READ,WRITE}_FB_SPAN_{LOCK,UNLOCK}
+ * do this for us.
+ *
+ * Note that the lock must be matched with an unlock. These
+ * macros include a spare curly brace, so they must
+ * be syntactically matched.
+ *
+ * Note, also, that you can't lock a buffer twice with different
+ * modes. That is to say, you can't lock a buffer in both read
+ * and write modes. The strideInBytes and LFB pointer will be
+ * the same with read and write locks, so you can use either.
+ * o The HW has different state for reads and writes, so
+ * locking it twice may give screwy results.
+ * o The DRM won't let you lock twice. It hangs. This is probably
+ * because of the LOCK_HARDWARE IN THE *_FB_SPAN_LOCK macros,
+ * and could be eliminated with nonlocking lock routines. But
+ * what's the point after all.
+ */
+#define READ_FB_SPAN_LOCK(fxMesa, info, target_buffer) \
+ UNLOCK_HARDWARE(fxMesa); \
+ LOCK_HARDWARE(fxMesa); \
+ (info).size=sizeof(info); \
+ if (fxMesa->Glide.grLfbLock(GR_LFB_READ_ONLY, \
+ target_buffer, \
+ GR_LFBWRITEMODE_ANY, \
+ GR_ORIGIN_UPPER_LEFT, \
+ FXFALSE, \
+ &(info))) {
+
+#define READ_FB_SPAN_UNLOCK(fxMesa, target_buffer) \
+ fxMesa->Glide.grLfbUnlock(GR_LFB_READ_ONLY, target_buffer); \
+ } else { \
+ fprintf(stderr, "tdfxDriver: Can't get %s (%d) read lock\n", \
+ (target_buffer == GR_BUFFER_BACKBUFFER) \
+ ? "back buffer" \
+ : ((target_buffer == GR_BUFFER_AUXBUFFER) \
+ ? "depth buffer" \
+ : "unknown buffer"), \
+ target_buffer); \
+ }
+
+#define WRITE_FB_SPAN_LOCK(fxMesa, info, target_buffer, write_mode) \
+ UNLOCK_HARDWARE(fxMesa); \
+ LOCK_HARDWARE(fxMesa); \
+ info.size=sizeof(info); \
+ if (fxMesa->Glide.grLfbLock(GR_LFB_WRITE_ONLY, \
+ target_buffer, \
+ write_mode, \
+ GR_ORIGIN_UPPER_LEFT, \
+ FXFALSE, \
+ &info)) {
+
+#define WRITE_FB_SPAN_UNLOCK(fxMesa, target_buffer) \
+ fxMesa->Glide.grLfbUnlock(GR_LFB_WRITE_ONLY, target_buffer); \
+ } else { \
+ fprintf(stderr, "tdfxDriver: Can't get %s (%d) write lock\n", \
+ (target_buffer == GR_BUFFER_BACKBUFFER) \
+ ? "back buffer" \
+ : ((target_buffer == GR_BUFFER_AUXBUFFER) \
+ ? "depth buffer" \
+ : "unknown buffer"), \
+ target_buffer); \
+ }
+
+/*
+ * Because the Linear Frame Buffer is not necessarily aligned
+ * with the depth buffer, we have to do some fiddling
+ * around to get the right addresses.
+ *
+ * Perhaps a picture is in order. The Linear Frame Buffer
+ * looks like this:
+ *
+ * |<----------------------info.strideInBytes------------->|
+ * |<-----physicalStrideInBytes------->|
+ * +-----------------------------------+xxxxxxxxxxxxxxxxxxx+
+ * | | |
+ * | Legal Memory | Forbidden Zone |
+ * | | |
+ * +-----------------------------------+xxxxxxxxxxxxxxxxxxx+
+ *
+ * You can only reliably read and write legal locations. Reads
+ * and writes from the Forbidden Zone will return undefined values,
+ * and may cause segmentation faults.
+ *
+ * Now, the depth buffer may not end up in a location such each
+ * scan line is an LFB line. For example, the depth buffer may
+ * look like this:
+ *
+ * wrapped ordinary.
+ * +-----------------------------------+xxxxxxxxxxxxxxxxxxx+
+ * |0000000000000000000000 | | back
+ * |1111111111111111111111 | | buffer
+ * |2222222222222222222222 | |
+ * |4096b align. padxx00000000000000000| Forbidden Zone | depth
+ * |0000 11111111111111111| | buffer
+ * |1111 22222222222222222| |
+ * |2222 | |
+ * +-----------------------------------+xxxxxxxxxxxxxxxxxxx+
+ * where each number is the scan line number. We know it will
+ * be aligned on 128 byte boundaries, at least. Aligning this
+ * on a scanline boundary causes the back and depth buffers to
+ * thrash in the SST1 cache. (Note that the back buffer is always
+ * allocated at the beginning of LFB memory, and so it is always
+ * properly aligned with the LFB stride.)
+ *
+ * We call the beginning of the line (which is the rightmost
+ * part of the depth line in the picture above) the *ordinary* part
+ * of the scanline, and the end of the line (which is the
+ * leftmost part, one line below) the *wrapped* part of the scanline.
+ * a.) We need to know what x value to subtract from the screen
+ * x coordinate to index into the wrapped part.
+ * b.) We also need to figure out if we need to read from the ordinary
+ * part scan line, or from the wrapped part of the scan line.
+ *
+ * [ad a]
+ * The first wrapped x coordinate is that coordinate such that
+ * depthBufferOffset&(info.strideInBytes) + x*elmentSize {*}
+ * > physicalStrideInBytes
+ * where depthBufferOffset is the LFB distance in bytes
+ * from the back buffer to the depth buffer. The expression
+ * depthBufferOffset&(info.strideInBytes)
+ * is then the offset (in bytes) from the beginining of (any)
+ * depth buffer line to first element in the line.
+ * Simplifying inequation {*} above we see that x is the smallest
+ * value such that
+ * x*elementSize > physicalStrideInBytes {**}
+ * - depthBufferOffset&(info.strideInBytes)
+ * Now, we know that both the summands on the right are multiples of
+ * 128, and elementSize <= 4, so if equality holds in {**}, x would
+ * be a multiple of 32. Thus we can set x to
+ * xwrapped = (physicalStrideInBytes
+ * - depthBufferOffset&(info.strideInBytes))/elementSize
+ * + 1
+ *
+ * [ad b]
+ * Question b is now simple. We read from the wrapped scan line if
+ * x is greater than xwrapped.
+ */
+#define TILE_WIDTH_IN_BYTES 128
+#define TILE_WIDTH_IN_ZOXELS(bpz) (TILE_WIDTH_IN_BYTES/(bpz))
+#define TILE_HEIGHT_IN_LINES 32
+typedef struct
+{
+ void *lfbPtr;
+ void *lfbWrapPtr;
+ FxU32 LFBStrideInElts;
+ GLint firstWrappedX;
+}
+LFBParameters;
+
+/*
+ * We need information about the back buffer. Note that
+ * this function *cannot be called* while the aux buffer
+ * is locked, or the caller will hang.
+ *
+ * Only Glide knows the LFB address of the back and depth
+ * offsets. The upper levels of Mesa know the depth offset,
+ * but that is not in LFB space, it is tiled memory space,
+ * and is not useable for us.
+ */
+static void
+GetBackBufferInfo(tdfxContextPtr fxMesa, GrLfbInfo_t * backBufferInfo)
+{
+ READ_FB_SPAN_LOCK(fxMesa, *backBufferInfo, GR_BUFFER_BACKBUFFER);
+ READ_FB_SPAN_UNLOCK(fxMesa, GR_BUFFER_BACKBUFFER);
+}
+
+static void
+GetFbParams(tdfxContextPtr fxMesa,
+ GrLfbInfo_t * info,
+ GrLfbInfo_t * backBufferInfo,
+ LFBParameters * ReadParamsp, FxU32 elementSize)
+{
+ FxU32 physicalStrideInBytes, bufferOffset;
+ FxU32 strideInBytes = info->strideInBytes;
+ char *lfbPtr = (char *) (info->lfbPtr); /* For arithmetic, use char * */
+
+ /*
+ * These two come directly from the info structure.
+ */
+ ReadParamsp->lfbPtr = (void *) lfbPtr;
+ ReadParamsp->LFBStrideInElts = strideInBytes / elementSize;
+ /*
+ * Now, calculate the value of firstWrappedX.
+ *
+ * The physical stride is the screen width in bytes rounded up to
+ * the next highest multiple of 128 bytes. Note that this fails
+ * when TILE_WIDTH_IN_BYTES is not a power of two.
+ *
+ * The buffer Offset is the distance between the beginning of
+ * the LFB space, which is the beginning of the back buffer,
+ * and the buffer we are gathering information about.
+ * We want to make this routine usable for operations on the
+ * back buffer, though we don't actually use it on the back
+ * buffer. Note, then, that if bufferOffset == 0, the firstWrappedX
+ * is in the forbidden zone, and is therefore never reached.
+ *
+ * Note that if
+ * physicalStrideInBytes
+ * < bufferOffset&(info->strideInBytes-1)
+ * the buffer begins in the forbidden zone. We assert for this.
+ */
+ bufferOffset = (FxU32)(lfbPtr - (char *) backBufferInfo->lfbPtr);
+ physicalStrideInBytes
+ = (fxMesa->screen_width * elementSize + TILE_WIDTH_IN_BYTES - 1)
+ & ~(TILE_WIDTH_IN_BYTES - 1);
+ assert(physicalStrideInBytes > (bufferOffset & (strideInBytes - 1)));
+ ReadParamsp->firstWrappedX
+ = (physicalStrideInBytes
+ - (bufferOffset & (strideInBytes - 1))) / elementSize;
+ /*
+ * This is the address of the next physical line.
+ */
+ ReadParamsp->lfbWrapPtr
+ = (void *) ((char *) backBufferInfo->lfbPtr
+ + (bufferOffset & ~(strideInBytes - 1))
+ + (TILE_HEIGHT_IN_LINES) * strideInBytes);
+}
+
+/*
+ * These macros fetch data from the frame buffer. The type is
+ * the type of data we want to fetch. It should match the type
+ * whose size was used with GetFbParams to fill in the structure
+ * in *ReadParamsp. We have a macro to read the ordinary
+ * part, a second macro to read the wrapped part, and one which
+ * will do either. When we are reading a span, we will know
+ * when the ordinary part ends, so there's no need to test for
+ * it. However, when reading and writing pixels, we don't
+ * necessarily know. I suppose it's a matter of taste whether
+ * it's better in the macro or in the call.
+ *
+ * Recall that x and y are screen coordinates.
+ */
+#define GET_FB_DATA(ReadParamsp, type, x, y) \
+ (((x) < (ReadParamsp)->firstWrappedX) \
+ ? (((type *)((ReadParamsp)->lfbPtr)) \
+ [(y) * ((ReadParamsp)->LFBStrideInElts) \
+ + (x)]) \
+ : (((type *)((ReadParamsp)->lfbWrapPtr)) \
+ [((y)) * ((ReadParamsp)->LFBStrideInElts) \
+ + ((x) - (ReadParamsp)->firstWrappedX)]))
+#define GET_ORDINARY_FB_DATA(ReadParamsp, type, x, y) \
+ (((type *)((ReadParamsp)->lfbPtr)) \
+ [(y) * ((ReadParamsp)->LFBStrideInElts) \
+ + (x)])
+#define GET_WRAPPED_FB_DATA(ReadParamsp, type, x, y) \
+ (((type *)((ReadParamsp)->lfbWrapPtr)) \
+ [((y)) * ((ReadParamsp)->LFBStrideInElts) \
+ + ((x) - (ReadParamsp)->firstWrappedX)])
+#define PUT_FB_DATA(ReadParamsp, type, x, y, value) \
+ (GET_FB_DATA(ReadParamsp, type, x, y) = (type)(value))
+#define PUT_ORDINARY_FB_DATA(ReadParamsp, type, x, y, value) \
+ (GET_ORDINARY_FB_DATA(ReadParamsp, type, x, y) = (type)(value))
+#define PUT_WRAPPED_FB_DATA(ReadParamsp, type, x, y, value) \
+ (GET_WRAPPED_FB_DATA(ReadParamsp, type, x, y) = (type)(value))
+
+static void
+tdfxDDWriteDepthSpan(GLcontext * ctx,
+ GLuint n, GLint x, GLint y, const GLdepth depth[],
+ const GLubyte mask[])
+{
+ tdfxContextPtr fxMesa = (tdfxContextPtr) ctx->DriverCtx;
+ GLint bottom = fxMesa->y_offset + fxMesa->height - 1;
+ GLuint depth_size = fxMesa->glCtx->Visual.depthBits;
+ GLuint stencil_size = fxMesa->glCtx->Visual.stencilBits;
+ GrLfbInfo_t info;
+ GLubyte visMask[MAX_WIDTH];
+
+ if (MESA_VERBOSE & VERBOSE_DRIVER) {
+ fprintf(stderr, "tdfxmesa: tdfxDDWriteDepthSpan(...)\n");
+ }
+
+ assert((depth_size == 16) || (depth_size == 24) || (depth_size == 32));
+ /*
+ * Convert x and y to screen coordinates.
+ */
+ x += fxMesa->x_offset;
+ y = bottom - y;
+ if (mask) {
+ GLint i;
+ GLushort d16;
+ GrLfbInfo_t backBufferInfo;
+
+ switch (depth_size) {
+ case 16:
+ GetBackBufferInfo(fxMesa, &backBufferInfo);
+ /*
+ * Note that the _LOCK macro adds a curly brace,
+ * and the UNLOCK macro removes it.
+ */
+ WRITE_FB_SPAN_LOCK(fxMesa, info, GR_BUFFER_AUXBUFFER,
+ GR_LFBWRITEMODE_ANY);
+ generate_vismask(fxMesa, x, y, n, visMask);
+ {
+ LFBParameters ReadParams;
+ int wrappedPartStart;
+ GetFbParams(fxMesa, &info, &backBufferInfo,
+ &ReadParams, sizeof(GLushort));
+ if (ReadParams.firstWrappedX <= x) {
+ wrappedPartStart = 0;
+ }
+ else if (n <= (ReadParams.firstWrappedX - x)) {
+ wrappedPartStart = n;
+ }
+ else {
+ wrappedPartStart = (ReadParams.firstWrappedX - x);
+ }
+ for (i = 0; i < wrappedPartStart; i++) {
+ if (mask[i] && visMask[i]) {
+ d16 = depth[i];
+ PUT_ORDINARY_FB_DATA(&ReadParams, GLushort, x + i, y, d16);
+ }
+ }
+ for (; i < n; i++) {
+ if (mask[i] && visMask[i]) {
+ d16 = depth[i];
+ PUT_WRAPPED_FB_DATA(&ReadParams, GLushort, x + i, y, d16);
+ }
+ }
+ }
+ WRITE_FB_SPAN_UNLOCK(fxMesa, GR_BUFFER_AUXBUFFER);
+ break;
+ case 24:
+ case 32:
+ GetBackBufferInfo(fxMesa, &backBufferInfo);
+ /*
+ * Note that the _LOCK macro adds a curly brace,
+ * and the UNLOCK macro removes it.
+ */
+ WRITE_FB_SPAN_LOCK(fxMesa, info, GR_BUFFER_AUXBUFFER,
+ GR_LFBWRITEMODE_ANY);
+ generate_vismask(fxMesa, x, y, n, visMask);
+ {
+ LFBParameters ReadParams;
+ int wrappedPartStart;
+ GetFbParams(fxMesa, &info, &backBufferInfo,
+ &ReadParams, sizeof(GLuint));
+ if (ReadParams.firstWrappedX <= x) {
+ wrappedPartStart = 0;
+ }
+ else if (n <= (ReadParams.firstWrappedX - x)) {
+ wrappedPartStart = n;
+ }
+ else {
+ wrappedPartStart = (ReadParams.firstWrappedX - x);
+ }
+ for (i = 0; i < wrappedPartStart; i++) {
+ GLuint d32;
+ if (mask[i] && visMask[i]) {
+ if (stencil_size > 0) {
+ d32 =
+ GET_ORDINARY_FB_DATA(&ReadParams, GLuint,
+ x + i, y);
+ d32 =
+ (d32 & 0xFF000000) | (depth[i] & 0x00FFFFFF);
+ }
+ else {
+ d32 = depth[i];
+ }
+ PUT_ORDINARY_FB_DATA(&ReadParams, GLuint, x + i, y, d32);
+ }
+ }
+ for (; i < n; i++) {
+ GLuint d32;
+ if (mask[i] && visMask[i]) {
+ if (stencil_size > 0) {
+ d32 =
+ GET_WRAPPED_FB_DATA(&ReadParams, GLuint,
+ x + i, y);
+ d32 =
+ (d32 & 0xFF000000) | (depth[i] & 0x00FFFFFF);
+ }
+ else {
+ d32 = depth[i];
+ }
+ PUT_WRAPPED_FB_DATA(&ReadParams, GLuint, x + i, y, d32);
+ }
+ }
+ }
+ WRITE_FB_SPAN_UNLOCK(fxMesa, GR_BUFFER_AUXBUFFER);
+ break;
+ }
+ }
+ else {
+ GLint i;
+ GLuint d32;
+ GLushort d16;
+ GrLfbInfo_t backBufferInfo;
+
+ switch (depth_size) {
+ case 16:
+ GetBackBufferInfo(fxMesa, &backBufferInfo);
+ /*
+ * Note that the _LOCK macro adds a curly brace,
+ * and the UNLOCK macro removes it.
+ */
+ WRITE_FB_SPAN_LOCK(fxMesa, info,
+ GR_BUFFER_AUXBUFFER, GR_LFBWRITEMODE_ANY);
+ generate_vismask(fxMesa, x, y, n, visMask);
+ {
+ LFBParameters ReadParams;
+ GLuint wrappedPartStart;
+ GetFbParams(fxMesa, &info, &backBufferInfo,
+ &ReadParams, sizeof(GLushort));
+ if (ReadParams.firstWrappedX <= x) {
+ wrappedPartStart = 0;
+ }
+ else if (n <= (ReadParams.firstWrappedX - x)) {
+ wrappedPartStart = n;
+ }
+ else {
+ wrappedPartStart = (ReadParams.firstWrappedX - x);
+ }
+ for (i = 0; i < wrappedPartStart; i++) {
+ if (visMask[i]) {
+ d16 = depth[i];
+ PUT_ORDINARY_FB_DATA(&ReadParams,
+ GLushort,
+ x + i, y,
+ d16);
+ }
+ }
+ for (; i < n; i++) {
+ if (visMask[i]) {
+ d16 = depth[i];
+ PUT_WRAPPED_FB_DATA(&ReadParams,
+ GLushort,
+ x + i, y,
+ d16);
+ }
+ }
+ }
+ WRITE_FB_SPAN_UNLOCK(fxMesa, GR_BUFFER_AUXBUFFER);
+ break;
+ case 24:
+ case 32:
+ GetBackBufferInfo(fxMesa, &backBufferInfo);
+ /*
+ * Note that the _LOCK macro adds a curly brace,
+ * and the UNLOCK macro removes it.
+ */
+ WRITE_FB_SPAN_LOCK(fxMesa, info,
+ GR_BUFFER_AUXBUFFER, GR_LFBWRITEMODE_ANY);
+ generate_vismask(fxMesa, x, y, n, visMask);
+ {
+ LFBParameters ReadParams;
+ GLuint wrappedPartStart;
+
+ GetFbParams(fxMesa, &info, &backBufferInfo,
+ &ReadParams, sizeof(GLuint));
+ if (ReadParams.firstWrappedX <= x) {
+ wrappedPartStart = 0;
+ }
+ else if (n <= (ReadParams.firstWrappedX - x)) {
+ wrappedPartStart = n;
+ }
+ else {
+ wrappedPartStart = (ReadParams.firstWrappedX - x);
+ }
+ for (i = 0; i < wrappedPartStart; i++) {
+ if (visMask[i]) {
+ if (stencil_size > 0) {
+ d32 = GET_ORDINARY_FB_DATA(&ReadParams, GLuint, x + i, y);
+ d32 =
+ (d32 & 0xFF000000) | (depth[i] & 0x00FFFFFF);
+ }
+ else {
+ d32 = depth[i];
+ }
+ PUT_ORDINARY_FB_DATA(&ReadParams, GLuint, x + i, y, d32);
+ }
+ }
+ for (; i < n; i++) {
+ if (visMask[i]) {
+ if (stencil_size > 0) {
+ d32 = GET_WRAPPED_FB_DATA(&ReadParams, GLuint, x + i, y);
+ d32 =
+ (d32 & 0xFF000000) | (depth[i] & 0x00FFFFFF);
+ }
+ else {
+ d32 = depth[i];
+ }
+ PUT_WRAPPED_FB_DATA(&ReadParams, GLuint, x + i, y, d32);
+ }
+ }
+ }
+ WRITE_FB_SPAN_UNLOCK(fxMesa, GR_BUFFER_AUXBUFFER);
+ break;
+ }
+ }
+}
+
+static void
+tdfxDDReadDepthSpan(GLcontext * ctx,
+ GLuint n, GLint x, GLint y, GLdepth depth[])
+{
+ tdfxContextPtr fxMesa = (tdfxContextPtr) ctx->DriverCtx;
+ GLint bottom = fxMesa->height + fxMesa->y_offset - 1;
+ GLuint i;
+ GLuint depth_size = fxMesa->glCtx->Visual.depthBits;
+ GrLfbInfo_t info;
+
+ if (MESA_VERBOSE & VERBOSE_DRIVER) {
+ fprintf(stderr, "tdfxmesa: tdfxDDReadDepthSpan(...)\n");
+ }
+
+ /*
+ * Convert to screen coordinates.
+ */
+ x += fxMesa->x_offset;
+ y = bottom - y;
+ switch (depth_size) {
+ case 16:
+ {
+ LFBParameters ReadParams;
+ GrLfbInfo_t backBufferInfo;
+ int wrappedPartStart;
+ GetBackBufferInfo(fxMesa, &backBufferInfo);
+ /*
+ * Note that the _LOCK macro adds a curly brace,
+ * and the UNLOCK macro removes it.
+ */
+ READ_FB_SPAN_LOCK(fxMesa, info, GR_BUFFER_AUXBUFFER);
+ GetFbParams(fxMesa, &info, &backBufferInfo,
+ &ReadParams, sizeof(GLushort));
+ if (ReadParams.firstWrappedX <= x) {
+ wrappedPartStart = 0;
+ }
+ else if (n <= (ReadParams.firstWrappedX - x)) {
+ wrappedPartStart = n;
+ }
+ else {
+ wrappedPartStart = (ReadParams.firstWrappedX - x);
+ }
+ /*
+ * Read the line.
+ */
+ for (i = 0; i < wrappedPartStart; i++) {
+ depth[i] =
+ GET_ORDINARY_FB_DATA(&ReadParams, GLushort, x + i, y);
+ }
+ for (; i < n; i++) {
+ depth[i] = GET_WRAPPED_FB_DATA(&ReadParams, GLushort,
+ x + i, y);
+ }
+ READ_FB_SPAN_UNLOCK(fxMesa, GR_BUFFER_AUXBUFFER);
+ break;
+ }
+ case 24:
+ case 32:
+ {
+ LFBParameters ReadParams;
+ GrLfbInfo_t backBufferInfo;
+ int wrappedPartStart;
+ GLuint stencil_size = fxMesa->glCtx->Visual.stencilBits;
+ GetBackBufferInfo(fxMesa, &backBufferInfo);
+ /*
+ * Note that the _LOCK macro adds a curly brace,
+ * and the UNLOCK macro removes it.
+ */
+ READ_FB_SPAN_LOCK(fxMesa, info, GR_BUFFER_AUXBUFFER);
+ GetFbParams(fxMesa, &info, &backBufferInfo,
+ &ReadParams, sizeof(GLuint));
+ if (ReadParams.firstWrappedX <= x) {
+ wrappedPartStart = 0;
+ }
+ else if (n <= (ReadParams.firstWrappedX - x)) {
+ wrappedPartStart = n;
+ }
+ else {
+ wrappedPartStart = (ReadParams.firstWrappedX - x);
+ }
+ /*
+ * Read the line.
+ */
+ for (i = 0; i < wrappedPartStart; i++) {
+ const GLuint mask =
+ (stencil_size > 0) ? 0x00FFFFFF : 0xFFFFFFFF;
+ depth[i] =
+ GET_ORDINARY_FB_DATA(&ReadParams, GLuint, x + i, y);
+ depth[i] &= mask;
+ }
+ for (; i < n; i++) {
+ const GLuint mask =
+ (stencil_size > 0) ? 0x00FFFFFF : 0xFFFFFFFF;
+ depth[i] = GET_WRAPPED_FB_DATA(&ReadParams, GLuint, x + i, y);
+ depth[i] &= mask;
+ }
+ READ_FB_SPAN_UNLOCK(fxMesa, GR_BUFFER_AUXBUFFER);
+ break;
+ }
+ }
+}
+
+
+static void
+tdfxDDWriteDepthPixels(GLcontext * ctx,
+ GLuint n, const GLint x[], const GLint y[],
+ const GLdepth depth[], const GLubyte mask[])
+{
+ tdfxContextPtr fxMesa = (tdfxContextPtr) ctx->DriverCtx;
+ GLint bottom = fxMesa->height + fxMesa->y_offset - 1;
+ GLuint i;
+ GLushort d16;
+ GLuint d32;
+ GLuint depth_size = fxMesa->glCtx->Visual.depthBits;
+ GLuint stencil_size = fxMesa->glCtx->Visual.stencilBits;
+ GrLfbInfo_t info;
+ int xpos;
+ int ypos;
+ GrLfbInfo_t backBufferInfo;
+
+ if (MESA_VERBOSE & VERBOSE_DRIVER) {
+ fprintf(stderr, "tdfxmesa: tdfxDDWriteDepthPixels(...)\n");
+ }
+
+ switch (depth_size) {
+ case 16:
+ GetBackBufferInfo(fxMesa, &backBufferInfo);
+ /*
+ * Note that the _LOCK macro adds a curly brace,
+ * and the UNLOCK macro removes it.
+ */
+ WRITE_FB_SPAN_LOCK(fxMesa, info,
+ GR_BUFFER_AUXBUFFER, GR_LFBWRITEMODE_ANY);
+ {
+ LFBParameters ReadParams;
+ GetFbParams(fxMesa, &info, &backBufferInfo,
+ &ReadParams, sizeof(GLushort));
+ for (i = 0; i < n; i++) {
+ if (mask[i] && visible_pixel(fxMesa, x[i], y[i])) {
+ xpos = x[i] + fxMesa->x_offset;
+ ypos = bottom - y[i];
+ d16 = depth[i];
+ PUT_FB_DATA(&ReadParams, GLushort, xpos, ypos, d16);
+ }
+ }
+ }
+ WRITE_FB_SPAN_UNLOCK(fxMesa, GR_BUFFER_AUXBUFFER);
+ break;
+ case 24:
+ case 32:
+ GetBackBufferInfo(fxMesa, &backBufferInfo);
+ /*
+ * Note that the _LOCK macro adds a curly brace,
+ * and the UNLOCK macro removes it.
+ */
+ WRITE_FB_SPAN_LOCK(fxMesa, info,
+ GR_BUFFER_AUXBUFFER, GR_LFBWRITEMODE_ANY);
+ {
+ LFBParameters ReadParams;
+ GetFbParams(fxMesa, &info, &backBufferInfo,
+ &ReadParams, sizeof(GLuint));
+ for (i = 0; i < n; i++) {
+ if (mask[i]) {
+ if (visible_pixel(fxMesa, x[i], y[i])) {
+ xpos = x[i] + fxMesa->x_offset;
+ ypos = bottom - y[i];
+ if (stencil_size > 0) {
+ d32 =
+ GET_FB_DATA(&ReadParams, GLuint, xpos, ypos);
+ d32 = (d32 & 0xFF000000) | (depth[i] & 0xFFFFFF);
+ }
+ else {
+ d32 = depth[i];
+ }
+ PUT_FB_DATA(&ReadParams, GLuint, xpos, ypos, d32);
+ }
+ }
+ }
+ }
+ WRITE_FB_SPAN_UNLOCK(fxMesa, GR_BUFFER_AUXBUFFER);
+ break;
+ }
+}
+
+
+static void
+tdfxDDReadDepthPixels(GLcontext * ctx, GLuint n,
+ const GLint x[], const GLint y[], GLdepth depth[])
+{
+ tdfxContextPtr fxMesa = (tdfxContextPtr) ctx->DriverCtx;
+ GLint bottom = fxMesa->height + fxMesa->y_offset - 1;
+ GLuint i;
+ GLuint depth_size = fxMesa->glCtx->Visual.depthBits;
+ GLushort d16;
+ int xpos;
+ int ypos;
+ GrLfbInfo_t info;
+ GLuint stencil_size;
+ GrLfbInfo_t backBufferInfo;
+
+ if (MESA_VERBOSE & VERBOSE_DRIVER) {
+ fprintf(stderr, "tdfxmesa: tdfxDDReadDepthPixels(...)\n");
+ }
+
+ assert((depth_size == 16) || (depth_size == 24) || (depth_size == 32));
+ switch (depth_size) {
+ case 16:
+ GetBackBufferInfo(fxMesa, &backBufferInfo);
+ /*
+ * Note that the _LOCK macro adds a curly brace,
+ * and the UNLOCK macro removes it.
+ */
+ READ_FB_SPAN_LOCK(fxMesa, info, GR_BUFFER_AUXBUFFER);
+ {
+ LFBParameters ReadParams;
+ GetFbParams(fxMesa, &info, &backBufferInfo,
+ &ReadParams, sizeof(GLushort));
+ for (i = 0; i < n; i++) {
+ /*
+ * Convert to screen coordinates.
+ */
+ xpos = x[i] + fxMesa->x_offset;
+ ypos = bottom - y[i];
+ d16 = GET_FB_DATA(&ReadParams, GLushort, xpos, ypos);
+ depth[i] = d16;
+ }
+ }
+ READ_FB_SPAN_UNLOCK(fxMesa, GR_BUFFER_AUXBUFFER);
+ break;
+ case 24:
+ case 32:
+ GetBackBufferInfo(fxMesa, &backBufferInfo);
+ /*
+ * Note that the _LOCK macro adds a curly brace,
+ * and the UNLOCK macro removes it.
+ */
+ READ_FB_SPAN_LOCK(fxMesa, info, GR_BUFFER_AUXBUFFER);
+ stencil_size = fxMesa->glCtx->Visual.stencilBits;
+ {
+ LFBParameters ReadParams;
+ GetFbParams(fxMesa, &info, &backBufferInfo,
+ &ReadParams, sizeof(GLuint));
+ for (i = 0; i < n; i++) {
+ GLuint d32;
+
+ /*
+ * Convert to screen coordinates.
+ */
+ xpos = x[i] + fxMesa->x_offset;
+ ypos = bottom - y[i];
+ d32 = GET_FB_DATA(&ReadParams, GLuint, xpos, ypos);
+ if (stencil_size > 0) {
+ d32 &= 0x00FFFFFF;
+ }
+ depth[i] = d32;
+ }
+ }
+ READ_FB_SPAN_UNLOCK(fxMesa, GR_BUFFER_AUXBUFFER);
+ break;
+ default:
+ assert(0);
+ }
+}
+
+/*
+ * Stencil buffer read/write functions.
+ */
+#define EXTRACT_S_FROM_ZS(zs) (((zs) >> 24) & 0xFF)
+#define EXTRACT_Z_FROM_ZS(zs) ((zs) & 0xffffff)
+#define BUILD_ZS(z, s) (((s) << 24) | (z))
+
+static void
+write_stencil_span(GLcontext * ctx, GLuint n, GLint x, GLint y,
+ const GLstencil stencil[], const GLubyte mask[])
+{
+ tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
+ GrLfbInfo_t info;
+ GrLfbInfo_t backBufferInfo;
+
+ GetBackBufferInfo(fxMesa, &backBufferInfo);
+ /*
+ * Note that the _LOCK macro adds a curly brace,
+ * and the UNLOCK macro removes it.
+ */
+ WRITE_FB_SPAN_LOCK(fxMesa, info, GR_BUFFER_AUXBUFFER, GR_LFBWRITEMODE_ANY);
+ {
+ const GLint winY = fxMesa->y_offset + fxMesa->height - 1;
+ const GLint winX = fxMesa->x_offset;
+ const GLint scrX = winX + x;
+ const GLint scrY = winY - y;
+ LFBParameters ReadParams;
+ GLubyte visMask[MAX_WIDTH];
+ GLuint i;
+ int wrappedPartStart;
+
+ GetFbParams(fxMesa, &info, &backBufferInfo, &ReadParams,
+ sizeof(GLuint));
+ if (ReadParams.firstWrappedX <= x) {
+ wrappedPartStart = 0;
+ }
+ else if (n <= (ReadParams.firstWrappedX - x)) {
+ wrappedPartStart = n;
+ }
+ else {
+ wrappedPartStart = (ReadParams.firstWrappedX - x);
+ }
+ generate_vismask(fxMesa, scrX, scrY, n, visMask);
+ for (i = 0; i < wrappedPartStart; i++) {
+ if (visMask[i] && (!mask || mask[i])) {
+ GLuint z = GET_ORDINARY_FB_DATA(&ReadParams, GLuint,
+ scrX + i, scrY) & 0x00FFFFFF;
+ z |= (stencil[i] & 0xFF) << 24;
+ PUT_ORDINARY_FB_DATA(&ReadParams, GLuint, scrX + i, scrY, z);
+ }
+ }
+ for (; i < n; i++) {
+ if (visMask[i] && (!mask || mask[i])) {
+ GLuint z = GET_WRAPPED_FB_DATA(&ReadParams, GLuint,
+ scrX + i, scrY) & 0x00FFFFFF;
+ z |= (stencil[i] & 0xFF) << 24;
+ PUT_WRAPPED_FB_DATA(&ReadParams, GLuint, scrX + i, scrY, z);
+ }
+ }
+ }
+ WRITE_FB_SPAN_UNLOCK(fxMesa, GR_BUFFER_AUXBUFFER);
+}
+
+
+static void
+read_stencil_span(GLcontext * ctx, GLuint n, GLint x, GLint y,
+ GLstencil stencil[])
+{
+ tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
+ GrLfbInfo_t info;
+ GrLfbInfo_t backBufferInfo;
+
+ GetBackBufferInfo(fxMesa, &backBufferInfo);
+ /*
+ * Note that the _LOCK macro adds a curly brace,
+ * and the UNLOCK macro removes it.
+ */
+ READ_FB_SPAN_LOCK(fxMesa, info, GR_BUFFER_AUXBUFFER);
+ {
+ const GLint winY = fxMesa->y_offset + fxMesa->height - 1;
+ const GLint winX = fxMesa->x_offset;
+ GLuint i;
+ LFBParameters ReadParams;
+ int wrappedPartStart;
+
+ /*
+ * Convert to screen coordinates.
+ */
+ x += winX;
+ y = winY - y;
+ GetFbParams(fxMesa, &info, &backBufferInfo, &ReadParams,
+ sizeof(GLuint));
+ if (ReadParams.firstWrappedX <= x) {
+ wrappedPartStart = 0;
+ }
+ else if (n <= (ReadParams.firstWrappedX - x)) {
+ wrappedPartStart = n;
+ }
+ else {
+ wrappedPartStart = (ReadParams.firstWrappedX - x);
+ }
+ for (i = 0; i < wrappedPartStart; i++) {
+ stencil[i] = (GET_ORDINARY_FB_DATA(&ReadParams, GLuint,
+ x + i, y) >> 24) & 0xFF;
+ }
+ for (; i < n; i++) {
+ stencil[i] = (GET_WRAPPED_FB_DATA(&ReadParams, GLuint,
+ x + i, y) >> 24) & 0xFF;
+ }
+ }
+ READ_FB_SPAN_UNLOCK(fxMesa, GR_BUFFER_AUXBUFFER);
+}
+
+
+static void
+write_stencil_pixels(GLcontext * ctx, GLuint n,
+ const GLint x[], const GLint y[],
+ const GLstencil stencil[], const GLubyte mask[])
+{
+ tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
+ GrLfbInfo_t info;
+ GrLfbInfo_t backBufferInfo;
+
+ GetBackBufferInfo(fxMesa, &backBufferInfo);
+ /*
+ * Note that the _LOCK macro adds a curly brace,
+ * and the UNLOCK macro removes it.
+ */
+ WRITE_FB_SPAN_LOCK(fxMesa, info, GR_BUFFER_AUXBUFFER, GR_LFBWRITEMODE_ANY);
+ {
+ const GLint winY = fxMesa->y_offset + fxMesa->height - 1;
+ const GLint winX = fxMesa->x_offset;
+ LFBParameters ReadParams;
+ GLuint i;
+
+ GetFbParams(fxMesa, &info, &backBufferInfo, &ReadParams,
+ sizeof(GLuint));
+ for (i = 0; i < n; i++) {
+ const GLint scrX = winX + x[i];
+ const GLint scrY = winY - y[i];
+ if ((!mask || mask[i]) && visible_pixel(fxMesa, scrX, scrY)) {
+ GLuint z =
+ GET_FB_DATA(&ReadParams, GLuint, scrX, scrY) & 0x00FFFFFF;
+ z |= (stencil[i] & 0xFF) << 24;
+ PUT_FB_DATA(&ReadParams, GLuint, scrX, scrY, z);
+ }
+ }
+ }
+ WRITE_FB_SPAN_UNLOCK(fxMesa, GR_BUFFER_AUXBUFFER);
+}
+
+
+static void
+read_stencil_pixels(GLcontext * ctx, GLuint n, const GLint x[],
+ const GLint y[], GLstencil stencil[])
+{
+ tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
+ GrLfbInfo_t info;
+ GrLfbInfo_t backBufferInfo;
+
+ GetBackBufferInfo(fxMesa, &backBufferInfo);
+ /*
+ * Note that the _LOCK macro adds a curly brace,
+ * and the UNLOCK macro removes it.
+ */
+ READ_FB_SPAN_LOCK(fxMesa, info, GR_BUFFER_AUXBUFFER);
+ {
+ const GLint winY = fxMesa->y_offset + fxMesa->height - 1;
+ const GLint winX = fxMesa->x_offset;
+ GLuint i;
+ LFBParameters ReadParams;
+
+ GetFbParams(fxMesa, &info, &backBufferInfo, &ReadParams,
+ sizeof(GLuint));
+ for (i = 0; i < n; i++) {
+ const GLint scrX = winX + x[i];
+ const GLint scrY = winY - y[i];
+ stencil[i] =
+ (GET_FB_DATA(&ReadParams, GLuint, scrX, scrY) >> 24) & 0xFF;
+ }
+ }
+ READ_FB_SPAN_UNLOCK(fxMesa, GR_BUFFER_AUXBUFFER);
+}
+
+#define VISUAL_EQUALS_RGBA(vis, r, g, b, a) \
+ ((vis.redBits == r) && \
+ (vis.greenBits == g) && \
+ (vis.blueBits == b) && \
+ (vis.alphaBits == a))
+
+
+
+
+/**********************************************************************/
+/* Locking for swrast */
+/**********************************************************************/
+
+
+static void tdfxSpanRenderStart( GLcontext *ctx )
+{
+ tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
+ LOCK_HARDWARE(fxMesa);
+}
+
+static void tdfxSpanRenderFinish( GLcontext *ctx )
+{
+ tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
+ _swrast_flush( ctx );
+ UNLOCK_HARDWARE(fxMesa);
+}
+
+/* Set the buffer used for reading */
+static void tdfxDDSetBuffer( GLcontext *ctx,
+ GLframebuffer *buffer, GLuint bufferBit )
+{
+ tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
+ (void) buffer;
+
+ switch ( bufferBit ) {
+ case FRONT_LEFT_BIT:
+ fxMesa->DrawBuffer = fxMesa->ReadBuffer = GR_BUFFER_FRONTBUFFER;
+ break;
+ case BACK_LEFT_BIT:
+ fxMesa->DrawBuffer = fxMesa->ReadBuffer = GR_BUFFER_BACKBUFFER;
+ break;
+ default:
+ break;
+ }
+}
+
+/**********************************************************************/
+/* Initialize swrast device driver */
+/**********************************************************************/
+
+void tdfxDDInitSpanFuncs( GLcontext *ctx )
+{
+ tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
+ struct swrast_device_driver *swdd = _swrast_GetDeviceDriverReference( ctx );
+
+ swdd->SetBuffer = tdfxDDSetBuffer;
+
+ if ( VISUAL_EQUALS_RGBA(ctx->Visual, 5, 6, 5, 0) )
+ {
+ /* 16bpp mode */
+ swdd->WriteRGBASpan = tdfxWriteRGBASpan_RGB565;
+ swdd->WriteRGBSpan = tdfxWriteRGBSpan_RGB565;
+ swdd->WriteMonoRGBASpan = tdfxWriteMonoRGBASpan_RGB565;
+ swdd->WriteRGBAPixels = tdfxWriteRGBAPixels_RGB565;
+ swdd->WriteMonoRGBAPixels = tdfxWriteMonoRGBAPixels_RGB565;
+ swdd->ReadRGBASpan = tdfxReadRGBASpan_RGB565;
+ swdd->ReadRGBAPixels = tdfxReadRGBAPixels_RGB565;
+ }
+ else if ( VISUAL_EQUALS_RGBA(ctx->Visual, 8, 8, 8, 0) )
+ {
+ /* 24bpp mode */
+ swdd->WriteRGBASpan = tdfxWriteRGBASpan_RGB888;
+ swdd->WriteRGBSpan = tdfxWriteRGBSpan_RGB888;
+ swdd->WriteMonoRGBASpan = tdfxWriteMonoRGBASpan_RGB888;
+ swdd->WriteRGBAPixels = tdfxWriteRGBAPixels_RGB888;
+ swdd->WriteMonoRGBAPixels = tdfxWriteMonoRGBAPixels_RGB888;
+ swdd->ReadRGBASpan = tdfxReadRGBASpan_RGB888;
+ swdd->ReadRGBAPixels = tdfxReadRGBAPixels_RGB888;
+ }
+ else if ( VISUAL_EQUALS_RGBA(ctx->Visual, 8, 8, 8, 8) )
+ {
+ /* 32bpp mode */
+ swdd->WriteRGBASpan = tdfxWriteRGBASpan_ARGB8888;
+ swdd->WriteRGBSpan = tdfxWriteRGBSpan_ARGB8888;
+ swdd->WriteMonoRGBASpan = tdfxWriteMonoRGBASpan_ARGB8888;
+ swdd->WriteRGBAPixels = tdfxWriteRGBAPixels_ARGB8888;
+ swdd->WriteMonoRGBAPixels = tdfxWriteMonoRGBAPixels_ARGB8888;
+ swdd->ReadRGBAPixels = tdfxReadRGBAPixels_ARGB8888;
+ swdd->ReadRGBASpan = tdfxReadRGBASpan_ARGB8888;
+ }
+ else
+ {
+ abort();
+ }
+
+ if ( fxMesa->haveHwStencil ) {
+ swdd->WriteStencilSpan = write_stencil_span;
+ swdd->ReadStencilSpan = read_stencil_span;
+ swdd->WriteStencilPixels = write_stencil_pixels;
+ swdd->ReadStencilPixels = read_stencil_pixels;
+ }
+
+ swdd->WriteDepthSpan = tdfxDDWriteDepthSpan;
+ swdd->WriteDepthPixels = tdfxDDWriteDepthPixels;
+ swdd->ReadDepthSpan = tdfxDDReadDepthSpan;
+ swdd->ReadDepthPixels = tdfxDDReadDepthPixels;
+
+ swdd->WriteCI8Span = NULL;
+ swdd->WriteCI32Span = NULL;
+ swdd->WriteMonoCISpan = NULL;
+ swdd->WriteCI32Pixels = NULL;
+ swdd->WriteMonoCIPixels = NULL;
+ swdd->ReadCI32Span = NULL;
+ swdd->ReadCI32Pixels = NULL;
+
+ swdd->SpanRenderStart = tdfxSpanRenderStart;
+ swdd->SpanRenderFinish = tdfxSpanRenderFinish;
+}