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-rw-r--r--src/mesa/drivers/x11/xm_line.c748
1 files changed, 748 insertions, 0 deletions
diff --git a/src/mesa/drivers/x11/xm_line.c b/src/mesa/drivers/x11/xm_line.c
new file mode 100644
index 00000000000..8312a2f23d0
--- /dev/null
+++ b/src/mesa/drivers/x11/xm_line.c
@@ -0,0 +1,748 @@
+/* $Id: xm_line.c,v 1.1 2000/09/07 15:40:30 brianp Exp $ */
+
+/*
+ * Mesa 3-D graphics library
+ * Version: 3.3
+ *
+ * Copyright (C) 1999 Brian Paul 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 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
+ * BRIAN PAUL 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.
+ */
+
+
+/*
+ * This file contains "accelerated" point, line, and triangle functions.
+ * It should be fairly easy to write new special-purpose point, line or
+ * triangle functions and hook them into this module.
+ */
+
+
+#include "glxheader.h"
+#include "depth.h"
+#include "macros.h"
+#include "vb.h"
+#include "types.h"
+#include "xmesaP.h"
+
+
+
+/**********************************************************************/
+/*** Point rendering ***/
+/**********************************************************************/
+
+
+/*
+ * Render an array of points into a pixmap, any pixel format.
+ */
+static void draw_points_ANY_pixmap( GLcontext *ctx, GLuint first, GLuint last )
+{
+ XMesaContext xmesa = (XMesaContext) ctx->DriverCtx;
+ XMesaDisplay *dpy = xmesa->xm_visual->display;
+ XMesaDrawable buffer = xmesa->xm_buffer->buffer;
+ XMesaGC gc = xmesa->xm_buffer->gc2;
+ struct vertex_buffer *VB = ctx->VB;
+ register GLuint i;
+
+ if (xmesa->xm_visual->gl_visual->RGBAflag) {
+ /* RGB mode */
+ for (i=first;i<=last;i++) {
+ if (VB->ClipMask[i]==0) {
+ register int x, y;
+ const GLubyte *color = VB->ColorPtr->data[i];
+ unsigned long pixel = xmesa_color_to_pixel( xmesa,
+ color[0], color[1], color[2], color[3], xmesa->pixelformat);
+ XMesaSetForeground( dpy, gc, pixel );
+ x = (GLint) VB->Win.data[i][0];
+ y = FLIP( xmesa->xm_buffer, (GLint) VB->Win.data[i][1] );
+ XMesaDrawPoint( dpy, buffer, gc, x, y);
+ }
+ }
+ }
+ else {
+ /* Color index mode */
+ for (i=first;i<=last;i++) {
+ if (VB->ClipMask[i]==0) {
+ register int x, y;
+ XMesaSetForeground( dpy, gc, VB->IndexPtr->data[i] );
+ x = (GLint) VB->Win.data[i][0];
+ y = FLIP( xmesa->xm_buffer, (GLint) VB->Win.data[i][1] );
+ XMesaDrawPoint( dpy, buffer, gc, x, y);
+ }
+ }
+ }
+}
+
+
+
+/*
+ * Analyze context state to see if we can provide a fast points drawing
+ * function, like those in points.c. Otherwise, return NULL.
+ */
+points_func xmesa_get_points_func( GLcontext *ctx )
+{
+ XMesaContext xmesa = (XMesaContext) ctx->DriverCtx;
+
+ if (ctx->Point.Size==1.0F && !ctx->Point.SmoothFlag && ctx->RasterMask==0
+ && !ctx->Texture.Enabled) {
+ if (xmesa->xm_buffer->buffer==XIMAGE) {
+ return NULL; /*draw_points_ximage;*/
+ }
+ else {
+ return draw_points_ANY_pixmap;
+ }
+ }
+ else {
+ return NULL;
+ }
+}
+
+
+
+/**********************************************************************/
+/*** Line rendering ***/
+/**********************************************************************/
+
+
+#if 0
+/*
+ * Render a line into a pixmap, any pixel format.
+ */
+static void flat_pixmap_line( GLcontext *ctx,
+ GLuint vert0, GLuint vert1, GLuint pv )
+{
+ XMesaContext xmesa = (XMesaContext) ctx->DriverCtx;
+ struct vertex_buffer *VB = ctx->VB;
+ register int x0, y0, x1, y1;
+ XMesaGC gc;
+ unsigned long pixel;
+ if (xmesa->xm_visual->gl_visual->RGBAflag) {
+ const GLubyte *color = VB->ColorPtr->data[pv];
+ pixel = xmesa_color_to_pixel( xmesa, color[0], color[1], color[2], color[3],
+ xmesa->pixelformat );
+ }
+ else {
+ pixel = VB->IndexPtr->data[pv];
+ }
+ gc = xmesa->xm_buffer->gc2;
+ XMesaSetForeground( xmesa->display, gc, pixel );
+
+ x0 = (GLint) VB->Win.data[vert0][0];
+ y0 = FLIP( xmesa->xm_buffer, (GLint) VB->Win.data[vert0][1] );
+ x1 = (GLint) VB->Win.data[vert1][0];
+ y1 = FLIP( xmesa->xm_buffer, (GLint) VB->Win.data[vert1][1] );
+ XMesaDrawLine( xmesa->display, xmesa->xm_buffer->buffer, gc,
+ x0, y0, x1, y1 );
+}
+#endif
+
+
+/*
+ * Draw a flat-shaded, PF_TRUECOLOR line into an XImage.
+ */
+static void flat_TRUECOLOR_line( GLcontext *ctx,
+ GLuint vert0, GLuint vert1, GLuint pv )
+{
+ XMesaContext xmesa = (XMesaContext) ctx->DriverCtx;
+ const GLubyte *color = ctx->VB->ColorPtr->data[pv];
+ XMesaImage *img = xmesa->xm_buffer->backimage;
+ unsigned long pixel;
+ PACK_TRUECOLOR( pixel, color[0], color[1], color[2] );
+
+#define INTERP_XY 1
+#define CLIP_HACK 1
+#define PLOT(X,Y) XMesaPutPixel( img, X, FLIP(xmesa->xm_buffer, Y), pixel );
+
+#include "linetemp.h"
+}
+
+
+
+/*
+ * Draw a flat-shaded, PF_8A8B8G8R line into an XImage.
+ */
+static void flat_8A8B8G8R_line( GLcontext *ctx,
+ GLuint vert0, GLuint vert1, GLuint pv )
+{
+ XMesaContext xmesa = (XMesaContext) ctx->DriverCtx;
+ const GLubyte *color = ctx->VB->ColorPtr->data[pv];
+ GLuint pixel = PACK_8B8G8R( color[0], color[1], color[2] );
+
+#define PIXEL_TYPE GLuint
+#define BYTES_PER_ROW (xmesa->xm_buffer->backimage->bytes_per_line)
+#define PIXEL_ADDRESS(X,Y) PIXELADDR4(xmesa->xm_buffer,X,Y)
+#define CLIP_HACK 1
+#define PLOT(X,Y) *pixelPtr = pixel;
+
+#include "linetemp.h"
+}
+
+
+/*
+ * Draw a flat-shaded, PF_8R8G8B line into an XImage.
+ */
+static void flat_8R8G8B_line( GLcontext *ctx,
+ GLuint vert0, GLuint vert1, GLuint pv )
+{
+ XMesaContext xmesa = (XMesaContext) ctx->DriverCtx;
+ const GLubyte *color = ctx->VB->ColorPtr->data[pv];
+ GLuint pixel = PACK_8R8G8B( color[0], color[1], color[2] );
+
+#define PIXEL_TYPE GLuint
+#define BYTES_PER_ROW (xmesa->xm_buffer->backimage->bytes_per_line)
+#define PIXEL_ADDRESS(X,Y) PIXELADDR4(xmesa->xm_buffer,X,Y)
+#define CLIP_HACK 1
+#define PLOT(X,Y) *pixelPtr = pixel;
+
+#include "linetemp.h"
+}
+
+
+/*
+ * Draw a flat-shaded, PF_8R8G8B24 line into an XImage.
+ */
+static void flat_8R8G8B24_line( GLcontext *ctx,
+ GLuint vert0, GLuint vert1, GLuint pv )
+{
+ XMesaContext xmesa = (XMesaContext) ctx->DriverCtx;
+ const GLubyte *color = ctx->VB->ColorPtr->data[pv];
+
+#define PIXEL_TYPE bgr_t
+#define BYTES_PER_ROW (xmesa->xm_buffer->backimage->bytes_per_line)
+#define PIXEL_ADDRESS(X,Y) PIXELADDR3(xmesa->xm_buffer,X,Y)
+#define CLIP_HACK 1
+#define PLOT(X,Y) { \
+ pixelPtr->r = color[RCOMP]; \
+ pixelPtr->g = color[GCOMP]; \
+ pixelPtr->b = color[BCOMP]; \
+}
+
+#include "linetemp.h"
+}
+
+
+/*
+ * Draw a flat-shaded, PF_5R6G5B line into an XImage.
+ */
+static void flat_5R6G5B_line( GLcontext *ctx,
+ GLuint vert0, GLuint vert1, GLuint pv )
+{
+ XMesaContext xmesa = (XMesaContext) ctx->DriverCtx;
+ const GLubyte *color = ctx->VB->ColorPtr->data[pv];
+ GLushort pixel = PACK_5R6G5B( color[0], color[1], color[2] );
+
+#define PIXEL_TYPE GLushort
+#define BYTES_PER_ROW (xmesa->xm_buffer->backimage->bytes_per_line)
+#define PIXEL_ADDRESS(X,Y) PIXELADDR2(xmesa->xm_buffer,X,Y)
+#define CLIP_HACK 1
+#define PLOT(X,Y) *pixelPtr = pixel;
+
+#include "linetemp.h"
+}
+
+
+/*
+ * Draw a flat-shaded, PF_DITHER_5R6G5B line into an XImage.
+ */
+static void flat_DITHER_5R6G5B_line( GLcontext *ctx,
+ GLuint vert0, GLuint vert1, GLuint pv )
+{
+ XMesaContext xmesa = (XMesaContext) ctx->DriverCtx;
+ const GLubyte *color = ctx->VB->ColorPtr->data[pv];
+
+#define PIXEL_TYPE GLushort
+#define BYTES_PER_ROW (xmesa->xm_buffer->backimage->bytes_per_line)
+#define PIXEL_ADDRESS(X,Y) PIXELADDR2(xmesa->xm_buffer,X,Y)
+#define CLIP_HACK 1
+#define PLOT(X,Y) PACK_TRUEDITHER( *pixelPtr, X, Y, color[0], color[1], color[2] );
+
+#include "linetemp.h"
+}
+
+
+
+/*
+ * Draw a flat-shaded, PF_DITHER 8-bit line into an XImage.
+ */
+static void flat_DITHER8_line( GLcontext *ctx,
+ GLuint vert0, GLuint vert1, GLuint pv )
+{
+ XMesaContext xmesa = (XMesaContext) ctx->DriverCtx;
+ const GLubyte *color = ctx->VB->ColorPtr->data[pv];
+ GLint r = color[0], g = color[1], b = color[2];
+ DITHER_SETUP;
+
+#define INTERP_XY 1
+#define PIXEL_TYPE GLubyte
+#define BYTES_PER_ROW (xmesa->xm_buffer->backimage->bytes_per_line)
+#define PIXEL_ADDRESS(X,Y) PIXELADDR1(xmesa->xm_buffer,X,Y)
+#define CLIP_HACK 1
+#define PLOT(X,Y) *pixelPtr = DITHER(X,Y,r,g,b);
+
+#include "linetemp.h"
+}
+
+
+/*
+ * Draw a flat-shaded, PF_LOOKUP 8-bit line into an XImage.
+ */
+static void flat_LOOKUP8_line( GLcontext *ctx,
+ GLuint vert0, GLuint vert1, GLuint pv )
+{
+ XMesaContext xmesa = (XMesaContext) ctx->DriverCtx;
+ const GLubyte *color = ctx->VB->ColorPtr->data[pv];
+ GLubyte pixel;
+ LOOKUP_SETUP;
+ pixel = (GLubyte) LOOKUP( color[0], color[1], color[2] );
+
+#define PIXEL_TYPE GLubyte
+#define BYTES_PER_ROW (xmesa->xm_buffer->backimage->bytes_per_line)
+#define PIXEL_ADDRESS(X,Y) PIXELADDR1(xmesa->xm_buffer,X,Y)
+#define CLIP_HACK 1
+#define PLOT(X,Y) *pixelPtr = pixel;
+
+#include "linetemp.h"
+}
+
+
+/*
+ * Draw a flat-shaded, PF_HPCR line into an XImage.
+ */
+static void flat_HPCR_line( GLcontext *ctx,
+ GLuint vert0, GLuint vert1, GLuint pv )
+{
+ XMesaContext xmesa = (XMesaContext) ctx->DriverCtx;
+ const GLubyte *color = ctx->VB->ColorPtr->data[pv];
+ GLint r = color[0], g = color[1], b = color[2];
+
+#define INTERP_XY 1
+#define PIXEL_TYPE GLubyte
+#define BYTES_PER_ROW (xmesa->xm_buffer->backimage->bytes_per_line)
+#define PIXEL_ADDRESS(X,Y) PIXELADDR1(xmesa->xm_buffer,X,Y)
+#define CLIP_HACK 1
+#define PLOT(X,Y) *pixelPtr = (GLubyte) DITHER_HPCR(X,Y,r,g,b);
+
+#include "linetemp.h"
+}
+
+
+
+/*
+ * Draw a flat-shaded, Z-less, PF_TRUECOLOR line into an XImage.
+ */
+static void flat_TRUECOLOR_z_line( GLcontext *ctx,
+ GLuint vert0, GLuint vert1, GLuint pv )
+{
+ XMesaContext xmesa = (XMesaContext) ctx->DriverCtx;
+ const GLubyte *color = ctx->VB->ColorPtr->data[pv];
+ XMesaImage *img = xmesa->xm_buffer->backimage;
+ unsigned long pixel;
+ PACK_TRUECOLOR( pixel, color[0], color[1], color[2] );
+
+#define INTERP_XY 1
+#define INTERP_Z 1
+#define DEPTH_TYPE DEFAULT_SOFTWARE_DEPTH_TYPE
+#define CLIP_HACK 1
+#define PLOT(X,Y) \
+ if (Z < *zPtr) { \
+ *zPtr = Z; \
+ XMesaPutPixel( img, X, FLIP(xmesa->xm_buffer, Y), pixel ); \
+ }
+
+#include "linetemp.h"
+}
+
+
+/*
+ * Draw a flat-shaded, Z-less, PF_8A8B8G8R line into an XImage.
+ */
+static void flat_8A8B8G8R_z_line( GLcontext *ctx,
+ GLuint vert0, GLuint vert1, GLuint pv )
+{
+ XMesaContext xmesa = (XMesaContext) ctx->DriverCtx;
+ const GLubyte *color = ctx->VB->ColorPtr->data[pv];
+ GLuint pixel = PACK_8B8G8R( color[0], color[1], color[2] );
+
+#define INTERP_Z 1
+#define DEPTH_TYPE DEFAULT_SOFTWARE_DEPTH_TYPE
+#define PIXEL_TYPE GLuint
+#define BYTES_PER_ROW (xmesa->xm_buffer->backimage->bytes_per_line)
+#define PIXEL_ADDRESS(X,Y) PIXELADDR4(xmesa->xm_buffer,X,Y)
+#define CLIP_HACK 1
+#define PLOT(X,Y) \
+ if (Z < *zPtr) { \
+ *zPtr = Z; \
+ *pixelPtr = pixel; \
+ }
+
+#include "linetemp.h"
+}
+
+
+/*
+ * Draw a flat-shaded, Z-less, PF_8R8G8B line into an XImage.
+ */
+static void flat_8R8G8B_z_line( GLcontext *ctx,
+ GLuint vert0, GLuint vert1, GLuint pv )
+{
+ XMesaContext xmesa = (XMesaContext) ctx->DriverCtx;
+ const GLubyte *color = ctx->VB->ColorPtr->data[pv];
+ GLuint pixel = PACK_8R8G8B( color[0], color[1], color[2] );
+
+#define INTERP_Z 1
+#define DEPTH_TYPE DEFAULT_SOFTWARE_DEPTH_TYPE
+#define PIXEL_TYPE GLuint
+#define BYTES_PER_ROW (xmesa->xm_buffer->backimage->bytes_per_line)
+#define PIXEL_ADDRESS(X,Y) PIXELADDR4(xmesa->xm_buffer,X,Y)
+#define CLIP_HACK 1
+#define PLOT(X,Y) \
+ if (Z < *zPtr) { \
+ *zPtr = Z; \
+ *pixelPtr = pixel; \
+ }
+
+#include "linetemp.h"
+}
+
+
+/*
+ * Draw a flat-shaded, Z-less, PF_8R8G8B24 line into an XImage.
+ */
+static void flat_8R8G8B24_z_line( GLcontext *ctx,
+ GLuint vert0, GLuint vert1, GLuint pv )
+{
+ XMesaContext xmesa = (XMesaContext) ctx->DriverCtx;
+ const GLubyte *color = ctx->VB->ColorPtr->data[pv];
+
+#define INTERP_Z 1
+#define DEPTH_TYPE DEFAULT_SOFTWARE_DEPTH_TYPE
+#define PIXEL_TYPE bgr_t
+#define BYTES_PER_ROW (xmesa->xm_buffer->backimage->bytes_per_line)
+#define PIXEL_ADDRESS(X,Y) PIXELADDR3(xmesa->xm_buffer,X,Y)
+#define CLIP_HACK 1
+#define PLOT(X,Y) \
+ if (Z < *zPtr) { \
+ *zPtr = Z; \
+ pixelPtr->r = color[RCOMP]; \
+ pixelPtr->g = color[GCOMP]; \
+ pixelPtr->b = color[BCOMP]; \
+ }
+
+#include "linetemp.h"
+}
+
+
+/*
+ * Draw a flat-shaded, Z-less, PF_5R6G5B line into an XImage.
+ */
+static void flat_5R6G5B_z_line( GLcontext *ctx,
+ GLuint vert0, GLuint vert1, GLuint pv )
+{
+ XMesaContext xmesa = (XMesaContext) ctx->DriverCtx;
+ const GLubyte *color = ctx->VB->ColorPtr->data[pv];
+ GLushort pixel = PACK_5R6G5B( color[0], color[1], color[2] );
+
+#define INTERP_Z 1
+#define DEPTH_TYPE DEFAULT_SOFTWARE_DEPTH_TYPE
+#define PIXEL_TYPE GLushort
+#define BYTES_PER_ROW (xmesa->xm_buffer->backimage->bytes_per_line)
+#define PIXEL_ADDRESS(X,Y) PIXELADDR2(xmesa->xm_buffer,X,Y)
+#define CLIP_HACK 1
+#define PLOT(X,Y) \
+ if (Z < *zPtr) { \
+ *zPtr = Z; \
+ *pixelPtr = pixel; \
+ }
+#include "linetemp.h"
+}
+
+
+/*
+ * Draw a flat-shaded, Z-less, PF_DITHER_5R6G5B line into an XImage.
+ */
+static void flat_DITHER_5R6G5B_z_line( GLcontext *ctx,
+ GLuint vert0, GLuint vert1, GLuint pv )
+{
+ XMesaContext xmesa = (XMesaContext) ctx->DriverCtx;
+ const GLubyte *color = ctx->VB->ColorPtr->data[pv];
+
+#define INTERP_Z 1
+#define DEPTH_TYPE DEFAULT_SOFTWARE_DEPTH_TYPE
+#define PIXEL_TYPE GLushort
+#define BYTES_PER_ROW (xmesa->xm_buffer->backimage->bytes_per_line)
+#define PIXEL_ADDRESS(X,Y) PIXELADDR2(xmesa->xm_buffer,X,Y)
+#define CLIP_HACK 1
+#define PLOT(X,Y) \
+ if (Z < *zPtr) { \
+ *zPtr = Z; \
+ PACK_TRUEDITHER(*pixelPtr, X, Y, color[0], color[1], color[2]); \
+ }
+#include "linetemp.h"
+}
+
+
+/*
+ * Draw a flat-shaded, Z-less, PF_DITHER 8-bit line into an XImage.
+ */
+static void flat_DITHER8_z_line( GLcontext *ctx,
+ GLuint vert0, GLuint vert1, GLuint pv )
+{
+ XMesaContext xmesa = (XMesaContext) ctx->DriverCtx;
+ const GLubyte *color = ctx->VB->ColorPtr->data[pv];
+ GLint r = color[0], g = color[1], b = color[2];
+ DITHER_SETUP;
+
+#define INTERP_XY 1
+#define INTERP_Z 1
+#define DEPTH_TYPE DEFAULT_SOFTWARE_DEPTH_TYPE
+#define PIXEL_TYPE GLubyte
+#define BYTES_PER_ROW (xmesa->xm_buffer->backimage->bytes_per_line)
+#define PIXEL_ADDRESS(X,Y) PIXELADDR1(xmesa->xm_buffer,X,Y)
+#define CLIP_HACK 1
+#define PLOT(X,Y) \
+ if (Z < *zPtr) { \
+ *zPtr = Z; \
+ *pixelPtr = (GLubyte) DITHER( X, Y, r, g, b); \
+ }
+#include "linetemp.h"
+}
+
+
+/*
+ * Draw a flat-shaded, Z-less, PF_LOOKUP 8-bit line into an XImage.
+ */
+static void flat_LOOKUP8_z_line( GLcontext *ctx,
+ GLuint vert0, GLuint vert1, GLuint pv )
+{
+ XMesaContext xmesa = (XMesaContext) ctx->DriverCtx;
+ const GLubyte *color = ctx->VB->ColorPtr->data[pv];
+ GLubyte pixel;
+ LOOKUP_SETUP;
+ pixel = (GLubyte) LOOKUP( color[0], color[1], color[2] );
+
+#define INTERP_Z 1
+#define DEPTH_TYPE DEFAULT_SOFTWARE_DEPTH_TYPE
+#define PIXEL_TYPE GLubyte
+#define BYTES_PER_ROW (xmesa->xm_buffer->backimage->bytes_per_line)
+#define PIXEL_ADDRESS(X,Y) PIXELADDR1(xmesa->xm_buffer,X,Y)
+#define CLIP_HACK 1
+#define PLOT(X,Y) \
+ if (Z < *zPtr) { \
+ *zPtr = Z; \
+ *pixelPtr = pixel; \
+ }
+
+#include "linetemp.h"
+}
+
+
+/*
+ * Draw a flat-shaded, Z-less, PF_HPCR line into an XImage.
+ */
+static void flat_HPCR_z_line( GLcontext *ctx,
+ GLuint vert0, GLuint vert1, GLuint pv )
+{
+ XMesaContext xmesa = (XMesaContext) ctx->DriverCtx;
+ const GLubyte *color = ctx->VB->ColorPtr->data[pv];
+ GLint r = color[0], g = color[1], b = color[2];
+
+#define INTERP_XY 1
+#define INTERP_Z 1
+#define DEPTH_TYPE DEFAULT_SOFTWARE_DEPTH_TYPE
+#define PIXEL_TYPE GLubyte
+#define BYTES_PER_ROW (xmesa->xm_buffer->backimage->bytes_per_line)
+#define PIXEL_ADDRESS(X,Y) PIXELADDR1(xmesa->xm_buffer,X,Y)
+#define CLIP_HACK 1
+#define PLOT(X,Y) \
+ if (Z < *zPtr) { \
+ *zPtr = Z; \
+ *pixelPtr = (GLubyte) DITHER_HPCR( X, Y, r, g, b); \
+ }
+
+#include "linetemp.h"
+}
+
+
+#if 0
+/*
+ * Examine ctx->Line attributes and set xmesa->xm_buffer->gc1
+ * and xmesa->xm_buffer->gc2 appropriately.
+ */
+static void setup_x_line_options( GLcontext *ctx )
+{
+ XMesaContext xmesa = (XMesaContext) ctx->DriverCtx;
+ int i, state, state0, new_state, len, offs;
+ int tbit;
+ char *dptr;
+ int n_segments = 0;
+ char dashes[20];
+ int line_width, line_style;
+
+ /*** Line Stipple ***/
+ if (ctx->Line.StippleFlag) {
+ const int pattern = ctx->Line.StipplePattern;
+
+ dptr = dashes;
+ state0 = state = ((pattern & 1) != 0);
+
+ /* Decompose the pattern */
+ for (i=1,tbit=2,len=1;i<16;++i,tbit=(tbit<<1))
+ {
+ new_state = ((tbit & pattern) != 0);
+ if (state != new_state)
+ {
+ *dptr++ = ctx->Line.StippleFactor * len;
+ len = 1;
+ state = new_state;
+ }
+ else
+ ++len;
+ }
+ *dptr = ctx->Line.StippleFactor * len;
+ n_segments = 1 + (dptr - dashes);
+
+ /* ensure an even no. of segments, or X may toggle on/off for consecutive patterns */
+ /* if (n_segments & 1) dashes [n_segments++] = 0; value of 0 not allowed in dash list */
+
+ /* Handle case where line style starts OFF */
+ if (state0 == 0)
+ offs = dashes[0];
+ else
+ offs = 0;
+
+#if 0
+fprintf (stderr, "input pattern: 0x%04x, offset %d, %d segments:", pattern, offs, n_segments);
+for (i = 0; i < n_segments; i++)
+fprintf (stderr, " %d", dashes[i]);
+fprintf (stderr, "\n");
+#endif
+
+ XMesaSetDashes( xmesa->display, xmesa->xm_buffer->gc1,
+ offs, dashes, n_segments );
+ XMesaSetDashes( xmesa->display, xmesa->xm_buffer->gc2,
+ offs, dashes, n_segments );
+
+ line_style = LineOnOffDash;
+ }
+ else {
+ line_style = LineSolid;
+ }
+
+ /*** Line Width ***/
+ line_width = (int) (ctx->Line.Width+0.5F);
+ if (line_width < 2) {
+ /* Use fast lines when possible */
+ line_width = 0;
+ }
+
+ /*** Set GC attributes ***/
+ XMesaSetLineAttributes( xmesa->display, xmesa->xm_buffer->gc1,
+ line_width, line_style, CapButt, JoinBevel);
+ XMesaSetLineAttributes( xmesa->display, xmesa->xm_buffer->gc2,
+ line_width, line_style, CapButt, JoinBevel);
+ XMesaSetFillStyle( xmesa->display, xmesa->xm_buffer->gc1, FillSolid );
+ XMesaSetFillStyle( xmesa->display, xmesa->xm_buffer->gc2, FillSolid );
+}
+#endif
+
+
+
+/*
+ * Analyze context state to see if we can provide a fast line drawing
+ * function, like those in lines.c. Otherwise, return NULL.
+ */
+line_func xmesa_get_line_func( GLcontext *ctx )
+{
+ XMesaContext xmesa = (XMesaContext) ctx->DriverCtx;
+ int depth = GET_VISUAL_DEPTH(xmesa->xm_visual);
+
+ (void) DitherValues; /* silence unused var warning */
+ (void) kernel1; /* silence unused var warning */
+
+ if (ctx->Line.SmoothFlag) return NULL;
+ if (ctx->Texture.Enabled) return NULL;
+ if (ctx->Light.ShadeModel!=GL_FLAT) return NULL;
+ /* X line stippling doesn't match OpenGL stippling */
+ if (ctx->Line.StippleFlag==GL_TRUE) return NULL;
+
+ if (xmesa->xm_buffer->buffer==XIMAGE
+ && ctx->RasterMask==DEPTH_BIT
+ && ctx->Depth.Func==GL_LESS
+ && ctx->Depth.Mask==GL_TRUE
+ && ctx->Visual->DepthBits == DEFAULT_SOFTWARE_DEPTH_BITS
+ && ctx->Line.Width==1.0F) {
+ switch (xmesa->pixelformat) {
+ case PF_TRUECOLOR:
+ return flat_TRUECOLOR_z_line;
+ case PF_8A8B8G8R:
+ return flat_8A8B8G8R_z_line;
+ case PF_8R8G8B:
+ return flat_8R8G8B_z_line;
+ case PF_8R8G8B24:
+ return flat_8R8G8B24_z_line;
+ case PF_5R6G5B:
+ return flat_5R6G5B_z_line;
+ case PF_DITHER_5R6G5B:
+ return flat_DITHER_5R6G5B_z_line;
+ case PF_DITHER:
+ return (depth==8) ? flat_DITHER8_z_line : NULL;
+ case PF_LOOKUP:
+ return (depth==8) ? flat_LOOKUP8_z_line : NULL;
+ case PF_HPCR:
+ return flat_HPCR_z_line;
+ default:
+ return NULL;
+ }
+ }
+ if (xmesa->xm_buffer->buffer==XIMAGE
+ && ctx->RasterMask==0
+ && ctx->Line.Width==1.0F) {
+ switch (xmesa->pixelformat) {
+ case PF_TRUECOLOR:
+ return flat_TRUECOLOR_line;
+ case PF_8A8B8G8R:
+ return flat_8A8B8G8R_line;
+ case PF_8R8G8B:
+ return flat_8R8G8B_line;
+ case PF_8R8G8B24:
+ return flat_8R8G8B24_line;
+ case PF_5R6G5B:
+ return flat_5R6G5B_line;
+ case PF_DITHER_5R6G5B:
+ return flat_DITHER_5R6G5B_line;
+ case PF_DITHER:
+ return (depth==8) ? flat_DITHER8_line : NULL;
+ case PF_LOOKUP:
+ return (depth==8) ? flat_LOOKUP8_line : NULL;
+ case PF_HPCR:
+ return flat_HPCR_line;
+ default:
+ return NULL;
+ }
+ }
+#if 0
+ /* XXX have to disable this because X's rasterization rules don't match
+ * software Mesa's. This causes the linehv.c conformance test to fail.
+ * In the future, we might provide a config option to enable this.
+ */
+ if (xmesa->xm_buffer->buffer!=XIMAGE && ctx->RasterMask==0) {
+ setup_x_line_options( ctx );
+ return flat_pixmap_line;
+ }
+#endif
+ return NULL;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-03 13:19:48 +0000