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|
/*
* Mesa 3-D graphics library
* Version: 6.5
*
* Copyright (C) 1999-2006 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 "mtypes.h"
#include "xmesaP.h"
/* Internal swrast includes:
*/
#include "swrast/s_depth.h"
#include "swrast/s_points.h"
#include "swrast/s_lines.h"
#include "swrast/s_context.h"
/**********************************************************************/
/*** Point rendering ***/
/**********************************************************************/
/*
* Render an array of points into a pixmap, any pixel format.
*/
#if 000
/* XXX don't use this, it doesn't dither correctly */
static void draw_points_ANY_pixmap( GLcontext *ctx, const SWvertex *vert )
{
XMesaContext xmesa = XMESA_CONTEXT(ctx);
XMesaDisplay *dpy = xmesa->xm_visual->display;
XMesaDrawable buffer = xmesa->xm_buffer->buffer;
XMesaGC gc = xmesa->xm_buffer->gc;
if (xmesa->xm_visual->mesa_visual.RGBAflag) {
register int x, y;
const GLubyte *color = vert->color;
unsigned long pixel = xmesa_color_to_pixel( xmesa,
color[0], color[1],
color[2], color[3],
xmesa->pixelformat);
XMesaSetForeground( dpy, gc, pixel );
x = (GLint) vert->win[0];
y = YFLIP( xrb, (GLint) vert->win[1] );
XMesaDrawPoint( dpy, buffer, gc, x, y);
}
else {
/* Color index mode */
register int x, y;
XMesaSetForeground( dpy, gc, vert->index );
x = (GLint) vert->win[0];
y = YFLIP( xrb, (GLint) vert->win[1] );
XMesaDrawPoint( dpy, buffer, gc, x, y);
}
}
#endif
/* Override the swrast point-selection function. Try to use one of
* our internal point functions, otherwise fall back to the standard
* swrast functions.
*/
void xmesa_choose_point( GLcontext *ctx )
{
#if 0
XMesaContext xmesa = XMESA_CONTEXT(ctx);
SWcontext *swrast = SWRAST_CONTEXT(ctx);
if (ctx->RenderMode == GL_RENDER
&& ctx->Point.Size == 1.0F && !ctx->Point.SmoothFlag
&& swrast->_RasterMask == 0
&& !ctx->Texture._EnabledUnits
&& xmesa->xm_buffer->buffer != XIMAGE) {
swrast->Point = draw_points_ANY_pixmap;
}
else {
_swrast_choose_point( ctx );
}
#else
_swrast_choose_point( ctx );
#endif
}
/**********************************************************************/
/*** Line rendering ***/
/**********************************************************************/
#if CHAN_BITS == 8
#define GET_XRB(XRB) struct xmesa_renderbuffer *XRB = \
xmesa_renderbuffer(ctx->DrawBuffer->_ColorDrawBuffers[0][0]->Wrapped)
/*
* Draw a flat-shaded, PF_TRUECOLOR line into an XImage.
*/
#define NAME flat_TRUECOLOR_line
#define SETUP_CODE \
XMesaContext xmesa = XMESA_CONTEXT(ctx); \
GET_XRB(xrb); \
const GLubyte *color = vert1->color; \
unsigned long pixel; \
PACK_TRUECOLOR( pixel, color[0], color[1], color[2] );
#define CLIP_HACK 1
#define PLOT(X,Y) XMesaPutPixel(xrb->ximage, X, YFLIP(xrb, Y), pixel );
#include "swrast/s_linetemp.h"
/*
* Draw a flat-shaded, PF_8A8B8G8R line into an XImage.
*/
#define NAME flat_8A8B8G8R_line
#define SETUP_CODE \
GET_XRB(xrb); \
const GLubyte *color = vert1->color; \
GLuint pixel = PACK_8A8B8G8R(color[0], color[1], color[2], color[3]);
#define PIXEL_TYPE GLuint
#define BYTES_PER_ROW (xrb->ximage->bytes_per_line)
#define PIXEL_ADDRESS(X,Y) PIXEL_ADDR4(xrb, X, Y)
#define CLIP_HACK 1
#define PLOT(X,Y) *pixelPtr = pixel;
#include "swrast/s_linetemp.h"
/*
* Draw a flat-shaded, PF_8A8R8G8B line into an XImage.
*/
#define NAME flat_8A8R8G8B_line
#define SETUP_CODE \
GET_XRB(xrb); \
const GLubyte *color = vert1->color; \
GLuint pixel = PACK_8A8R8G8B(color[0], color[1], color[2], color[3]);
#define PIXEL_TYPE GLuint
#define BYTES_PER_ROW (xrb->ximage->bytes_per_line)
#define PIXEL_ADDRESS(X,Y) PIXEL_ADDR4(xrb, X, Y)
#define CLIP_HACK 1
#define PLOT(X,Y) *pixelPtr = pixel;
#include "swrast/s_linetemp.h"
/*
* Draw a flat-shaded, PF_8R8G8B line into an XImage.
*/
#define NAME flat_8R8G8B_line
#define SETUP_CODE \
GET_XRB(xrb); \
const GLubyte *color = vert1->color; \
GLuint pixel = PACK_8R8G8B( color[0], color[1], color[2] );
#define PIXEL_TYPE GLuint
#define BYTES_PER_ROW (xrb->ximage->bytes_per_line)
#define PIXEL_ADDRESS(X,Y) PIXEL_ADDR4(xrb, X, Y)
#define CLIP_HACK 1
#define PLOT(X,Y) *pixelPtr = pixel;
#include "swrast/s_linetemp.h"
/*
* Draw a flat-shaded, PF_8R8G8B24 line into an XImage.
*/
#define NAME flat_8R8G8B24_line
#define SETUP_CODE \
GET_XRB(xrb); \
const GLubyte *color = vert1->color;
#define PIXEL_TYPE bgr_t
#define BYTES_PER_ROW (xrb->ximage->bytes_per_line)
#define PIXEL_ADDRESS(X,Y) PIXEL_ADDR3(xrb, X, Y)
#define CLIP_HACK 1
#define PLOT(X,Y) { \
pixelPtr->r = color[RCOMP]; \
pixelPtr->g = color[GCOMP]; \
pixelPtr->b = color[BCOMP]; \
}
#include "swrast/s_linetemp.h"
/*
* Draw a flat-shaded, PF_5R6G5B line into an XImage.
*/
#define NAME flat_5R6G5B_line
#define SETUP_CODE \
GET_XRB(xrb); \
const GLubyte *color = vert1->color; \
GLushort pixel = PACK_5R6G5B( color[0], color[1], color[2] );
#define PIXEL_TYPE GLushort
#define BYTES_PER_ROW (xrb->ximage->bytes_per_line)
#define PIXEL_ADDRESS(X,Y) PIXEL_ADDR2(xrb, X, Y)
#define CLIP_HACK 1
#define PLOT(X,Y) *pixelPtr = pixel;
#include "swrast/s_linetemp.h"
/*
* Draw a flat-shaded, PF_DITHER_5R6G5B line into an XImage.
*/
#define NAME flat_DITHER_5R6G5B_line
#define SETUP_CODE \
GET_XRB(xrb); \
XMesaContext xmesa = XMESA_CONTEXT(ctx); \
const GLubyte *color = vert1->color;
#define PIXEL_TYPE GLushort
#define BYTES_PER_ROW (xrb->ximage->bytes_per_line)
#define PIXEL_ADDRESS(X,Y) PIXEL_ADDR2(xrb, X, Y)
#define CLIP_HACK 1
#define PLOT(X,Y) PACK_TRUEDITHER( *pixelPtr, X, Y, color[0], color[1], color[2] );
#include "swrast/s_linetemp.h"
/*
* Draw a flat-shaded, PF_DITHER 8-bit line into an XImage.
*/
#define NAME flat_DITHER8_line
#define SETUP_CODE \
GET_XRB(xrb); \
const GLubyte *color = vert1->color; \
GLint r = color[0], g = color[1], b = color[2]; \
DITHER_SETUP;
#define PIXEL_TYPE GLubyte
#define BYTES_PER_ROW (xrb->ximage->bytes_per_line)
#define PIXEL_ADDRESS(X,Y) PIXEL_ADDR1(xrb, X, Y)
#define CLIP_HACK 1
#define PLOT(X,Y) *pixelPtr = DITHER(X,Y,r,g,b);
#include "swrast/s_linetemp.h"
/*
* Draw a flat-shaded, PF_LOOKUP 8-bit line into an XImage.
*/
#define NAME flat_LOOKUP8_line
#define SETUP_CODE \
GET_XRB(xrb); \
const GLubyte *color = vert1->color; \
GLubyte pixel; \
LOOKUP_SETUP; \
pixel = (GLubyte) LOOKUP( color[0], color[1], color[2] );
#define PIXEL_TYPE GLubyte
#define BYTES_PER_ROW (xrb->ximage->bytes_per_line)
#define PIXEL_ADDRESS(X,Y) PIXEL_ADDR1(xrb, X,Y)
#define CLIP_HACK 1
#define PLOT(X,Y) *pixelPtr = pixel;
#include "swrast/s_linetemp.h"
/*
* Draw a flat-shaded, PF_HPCR line into an XImage.
*/
#define NAME flat_HPCR_line
#define SETUP_CODE \
GET_XRB(xrb); \
XMesaContext xmesa = XMESA_CONTEXT(ctx); \
const GLubyte *color = vert1->color; \
GLint r = color[0], g = color[1], b = color[2];
#define PIXEL_TYPE GLubyte
#define BYTES_PER_ROW (xrb->ximage->bytes_per_line)
#define PIXEL_ADDRESS(X,Y) PIXEL_ADDR1(xrb, X,Y)
#define CLIP_HACK 1
#define PLOT(X,Y) *pixelPtr = (GLubyte) DITHER_HPCR(X,Y,r,g,b);
#include "swrast/s_linetemp.h"
/*
* Draw a flat-shaded, Z-less, PF_TRUECOLOR line into an XImage.
*/
#define NAME flat_TRUECOLOR_z_line
#define SETUP_CODE \
GET_XRB(xrb); \
XMesaContext xmesa = XMESA_CONTEXT(ctx); \
const GLubyte *color = vert1->color; \
unsigned long pixel; \
PACK_TRUECOLOR( pixel, color[0], color[1], color[2] );
#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(xrb->ximage, X, YFLIP(xrb, Y), pixel); \
}
#include "swrast/s_linetemp.h"
/*
* Draw a flat-shaded, Z-less, PF_8A8B8G8R line into an XImage.
*/
#define NAME flat_8A8B8G8R_z_line
#define SETUP_CODE \
GET_XRB(xrb); \
const GLubyte *color = vert1->color; \
GLuint pixel = PACK_8A8B8G8R(color[0], color[1], color[2], color[3]);
#define INTERP_Z 1
#define DEPTH_TYPE DEFAULT_SOFTWARE_DEPTH_TYPE
#define PIXEL_TYPE GLuint
#define BYTES_PER_ROW (xrb->ximage->bytes_per_line)
#define PIXEL_ADDRESS(X,Y) PIXEL_ADDR4(xrb, X,Y)
#define CLIP_HACK 1
#define PLOT(X,Y) \
if (Z < *zPtr) { \
*zPtr = Z; \
*pixelPtr = pixel; \
}
#include "swrast/s_linetemp.h"
/*
* Draw a flat-shaded, Z-less, PF_8A8R8G8B line into an XImage.
*/
#define NAME flat_8A8R8G8B_z_line
#define SETUP_CODE \
GET_XRB(xrb); \
const GLubyte *color = vert1->color; \
GLuint pixel = PACK_8A8R8G8B(color[0], color[1], color[2], color[3]);
#define INTERP_Z 1
#define DEPTH_TYPE DEFAULT_SOFTWARE_DEPTH_TYPE
#define PIXEL_TYPE GLuint
#define BYTES_PER_ROW (xrb->ximage->bytes_per_line)
#define PIXEL_ADDRESS(X,Y) PIXEL_ADDR4(xrb, X,Y)
#define CLIP_HACK 1
#define PLOT(X,Y) \
if (Z < *zPtr) { \
*zPtr = Z; \
*pixelPtr = pixel; \
}
#include "swrast/s_linetemp.h"
/*
* Draw a flat-shaded, Z-less, PF_8R8G8B line into an XImage.
*/
#define NAME flat_8R8G8B_z_line
#define SETUP_CODE \
GET_XRB(xrb); \
const GLubyte *color = vert1->color; \
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 (xrb->ximage->bytes_per_line)
#define PIXEL_ADDRESS(X,Y) PIXEL_ADDR4(xrb, X,Y)
#define CLIP_HACK 1
#define PLOT(X,Y) \
if (Z < *zPtr) { \
*zPtr = Z; \
*pixelPtr = pixel; \
}
#include "swrast/s_linetemp.h"
/*
* Draw a flat-shaded, Z-less, PF_8R8G8B24 line into an XImage.
*/
#define NAME flat_8R8G8B24_z_line
#define SETUP_CODE \
GET_XRB(xrb); \
const GLubyte *color = vert1->color;
#define INTERP_Z 1
#define DEPTH_TYPE DEFAULT_SOFTWARE_DEPTH_TYPE
#define PIXEL_TYPE bgr_t
#define BYTES_PER_ROW (xrb->ximage->bytes_per_line)
#define PIXEL_ADDRESS(X,Y) PIXEL_ADDR3(xrb, 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 "swrast/s_linetemp.h"
/*
* Draw a flat-shaded, Z-less, PF_5R6G5B line into an XImage.
*/
#define NAME flat_5R6G5B_z_line
#define SETUP_CODE \
GET_XRB(xrb); \
const GLubyte *color = vert1->color; \
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 (xrb->ximage->bytes_per_line)
#define PIXEL_ADDRESS(X,Y) PIXEL_ADDR2(xrb, X,Y)
#define CLIP_HACK 1
#define PLOT(X,Y) \
if (Z < *zPtr) { \
*zPtr = Z; \
*pixelPtr = pixel; \
}
#include "swrast/s_linetemp.h"
/*
* Draw a flat-shaded, Z-less, PF_DITHER_5R6G5B line into an XImage.
*/
#define NAME flat_DITHER_5R6G5B_z_line
#define SETUP_CODE \
GET_XRB(xrb); \
XMesaContext xmesa = XMESA_CONTEXT(ctx); \
const GLubyte *color = vert1->color;
#define INTERP_Z 1
#define DEPTH_TYPE DEFAULT_SOFTWARE_DEPTH_TYPE
#define PIXEL_TYPE GLushort
#define BYTES_PER_ROW (xrb->ximage->bytes_per_line)
#define PIXEL_ADDRESS(X,Y) PIXEL_ADDR2(xrb, 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 "swrast/s_linetemp.h"
/*
* Draw a flat-shaded, Z-less, PF_DITHER 8-bit line into an XImage.
*/
#define NAME flat_DITHER8_z_line
#define SETUP_CODE \
GET_XRB(xrb); \
const GLubyte *color = vert1->color; \
GLint r = color[0], g = color[1], b = color[2]; \
DITHER_SETUP;
#define INTERP_Z 1
#define DEPTH_TYPE DEFAULT_SOFTWARE_DEPTH_TYPE
#define PIXEL_TYPE GLubyte
#define BYTES_PER_ROW (xrb->ximage->bytes_per_line)
#define PIXEL_ADDRESS(X,Y) PIXEL_ADDR1(xrb, X,Y)
#define CLIP_HACK 1
#define PLOT(X,Y) \
if (Z < *zPtr) { \
*zPtr = Z; \
*pixelPtr = (GLubyte) DITHER( X, Y, r, g, b); \
}
#include "swrast/s_linetemp.h"
/*
* Draw a flat-shaded, Z-less, PF_LOOKUP 8-bit line into an XImage.
*/
#define NAME flat_LOOKUP8_z_line
#define SETUP_CODE \
GET_XRB(xrb); \
const GLubyte *color = vert1->color; \
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 (xrb->ximage->bytes_per_line)
#define PIXEL_ADDRESS(X,Y) PIXEL_ADDR1(xrb, X,Y)
#define CLIP_HACK 1
#define PLOT(X,Y) \
if (Z < *zPtr) { \
*zPtr = Z; \
*pixelPtr = pixel; \
}
#include "swrast/s_linetemp.h"
/*
* Draw a flat-shaded, Z-less, PF_HPCR line into an XImage.
*/
#define NAME flat_HPCR_z_line
#define SETUP_CODE \
GET_XRB(xrb); \
XMesaContext xmesa = XMESA_CONTEXT(ctx); \
const GLubyte *color = vert1->color; \
GLint r = color[0], g = color[1], b = color[2];
#define INTERP_Z 1
#define DEPTH_TYPE DEFAULT_SOFTWARE_DEPTH_TYPE
#define PIXEL_TYPE GLubyte
#define BYTES_PER_ROW (xrb->ximage->bytes_per_line)
#define PIXEL_ADDRESS(X,Y) PIXEL_ADDR1(xrb, 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 "swrast/s_linetemp.h"
#ifndef XFree86Server
/**
* Draw fast, XOR line with XDrawLine in front color buffer.
* WARNING: this isn't fully OpenGL conformant because different pixels
* will be hit versus using the other line functions.
* Don't use the code in X server GLcore module since we need a wrapper
* for the XSetLineAttributes() function call.
*/
static void
xor_line(GLcontext *ctx, const SWvertex *vert0, const SWvertex *vert1)
{
XMesaContext xmesa = XMESA_CONTEXT(ctx);
XMesaDisplay *dpy = xmesa->xm_visual->display;
XMesaGC gc = xmesa->xm_buffer->gc;
GET_XRB(xrb);
unsigned long pixel = xmesa_color_to_pixel(ctx,
vert1->color[0], vert1->color[1],
vert1->color[2], vert1->color[3],
xmesa->pixelformat);
int x0 = (int) vert0->win[0];
int y0 = YFLIP(xrb, (GLint) vert0->win[1]);
int x1 = (int) vert1->win[0];
int y1 = YFLIP(xrb, (GLint) vert1->win[1]);
XMesaSetForeground(dpy, gc, pixel);
XMesaSetFunction(dpy, gc, GXxor);
XSetLineAttributes(dpy, gc, (int) ctx->Line.Width,
LineSolid, CapButt, JoinMiter);
XDrawLine(dpy, xrb->pixmap, gc, x0, y0, x1, y1);
XMesaSetFunction(dpy, gc, GXcopy); /* this gc is used elsewhere */
}
#endif /* XFree86Server */
#endif /* CHAN_BITS == 8 */
/**
* Return pointer to line drawing function, or NULL if we should use a
* swrast fallback.
*/
static swrast_line_func
get_line_func(GLcontext *ctx)
{
#if CHAN_BITS == 8
SWcontext *swrast = SWRAST_CONTEXT(ctx);
XMesaContext xmesa = XMESA_CONTEXT(ctx);
XMesaBuffer xmbuf = XMESA_BUFFER(ctx->DrawBuffer);
const int depth = GET_VISUAL_DEPTH(xmesa->xm_visual);
const struct xmesa_renderbuffer *xrb;
if ((ctx->DrawBuffer->_ColorDrawBufferMask[0]
& (BUFFER_BIT_FRONT_LEFT | BUFFER_BIT_BACK_LEFT)) == 0)
return (swrast_line_func) NULL;
if (ctx->RenderMode != GL_RENDER) return (swrast_line_func) NULL;
if (ctx->Line.SmoothFlag) return (swrast_line_func) NULL;
if (ctx->Texture._EnabledUnits) return (swrast_line_func) NULL;
if (ctx->Light.ShadeModel != GL_FLAT) return (swrast_line_func) NULL;
if (ctx->Line.StippleFlag) return (swrast_line_func) NULL;
if (swrast->_RasterMask & MULTI_DRAW_BIT) return (swrast_line_func) NULL;
if (xmbuf->swAlpha) return (swrast_line_func) NULL;
xrb = xmesa_renderbuffer(ctx->DrawBuffer->_ColorDrawBuffers[0][0]->Wrapped);
if (xrb->ximage
&& swrast->_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_8A8R8G8B:
return flat_8A8R8G8B_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 : (swrast_line_func) NULL;
case PF_Lookup:
return (depth==8) ? flat_LOOKUP8_z_line : (swrast_line_func) NULL;
case PF_HPCR:
return flat_HPCR_z_line;
default:
return (swrast_line_func)NULL;
}
}
if (xrb->ximage
&& swrast->_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_8A8R8G8B:
return flat_8A8R8G8B_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 : (swrast_line_func) NULL;
case PF_Lookup:
return (depth==8) ? flat_LOOKUP8_line : (swrast_line_func) NULL;
case PF_HPCR:
return flat_HPCR_line;
default:
return (swrast_line_func)NULL;
}
}
#ifndef XFree86Server
if (ctx->DrawBuffer->_NumColorDrawBuffers[0] == 1
&& ctx->DrawBuffer->_ColorDrawBufferMask[0] == BUFFER_BIT_FRONT_LEFT
&& swrast->_RasterMask == LOGIC_OP_BIT
&& ctx->Color.LogicOp == GL_XOR
&& !ctx->Line.StippleFlag
&& !ctx->Line.SmoothFlag) {
return xor_line;
}
#endif /* XFree86Server */
#endif /* CHAN_BITS == 8 */
return (swrast_line_func) NULL;
}
/**
* Override for the swrast line-selection function. Try to use one
* of our internal line functions, otherwise fall back to the
* standard swrast functions.
*/
void
xmesa_choose_line(GLcontext *ctx)
{
SWcontext *swrast = SWRAST_CONTEXT(ctx);
if (!(swrast->Line = get_line_func( ctx )))
_swrast_choose_line( ctx );
}
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