/**
* 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(struct gl_context *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 = (GLint) vert0->attrib[VARYING_SLOT_POS][0];
int y0 = YFLIP(xrb, (GLint) vert0->attrib[VARYING_SLOT_POS][1]);
int x1 = (GLint) vert1->attrib[VARYING_SLOT_POS][0];
int y1 = YFLIP(xrb, (GLint) vert1->attrib[VARYING_SLOT_POS][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 */
}
static swrast_tri_func get_triangle_func( GLcontext *ctx )
{
SWcontext *swrast = SWRAST_CONTEXT(ctx);
XMesaContext xmesa = XMESA_CONTEXT(ctx);
int depth = GET_VISUAL_DEPTH(xmesa->xm_visual);
GET_XRB(xrb);
#ifdef DEBUG
triFuncName = NULL;
#endif
if ((ctx->DrawBuffer->_ColorDrawBufferMask[0]
& (BUFFER_BIT_FRONT_LEFT | BUFFER_BIT_BACK_LEFT)) == 0)
return (swrast_tri_func) NULL;
if (ctx->RenderMode != GL_RENDER) return (swrast_tri_func) NULL;
if (ctx->Polygon.SmoothFlag) return (swrast_tri_func) NULL;
if (ctx->Texture._EnabledUnits) return (swrast_tri_func) NULL;
if (swrast->_RasterMask & MULTI_DRAW_BIT) return (swrast_tri_func) NULL;
if (ctx->Polygon.CullFlag &&
ctx->Polygon.CullFaceMode == GL_FRONT_AND_BACK)
return (swrast_tri_func) NULL;
if (xrb->ximage) {
if ( ctx->Light.ShadeModel==GL_SMOOTH
&& swrast->_RasterMask==DEPTH_BIT
&& ctx->Depth.Func==GL_LESS
&& ctx->Depth.Mask==GL_TRUE
&& ctx->Visual.depthBits == DEFAULT_SOFTWARE_DEPTH_BITS
&& ctx->Polygon.StippleFlag==GL_FALSE) {
switch (xmesa->pixelformat) {
case PF_Truecolor:
USE(smooth_TRUECOLOR_z_triangle);
case PF_8A8B8G8R:
USE(smooth_8A8B8G8R_z_triangle);
case PF_8A8R8G8B:
USE(smooth_8A8R8G8B_z_triangle);
case PF_8R8G8B:
USE(smooth_8R8G8B_z_triangle);
case PF_8R8G8B24:
USE(smooth_8R8G8B24_z_triangle);
case PF_Dither_True:
USE(smooth_TRUEDITHER_z_triangle);
case PF_5R6G5B:
USE(smooth_5R6G5B_z_triangle);
case PF_Dither_5R6G5B:
USE(smooth_DITHER_5R6G5B_z_triangle);
case PF_HPCR:
USE(smooth_HPCR_z_triangle);
case PF_Dither:
if (depth == 8)
USE(smooth_DITHER8_z_triangle);
else
USE(smooth_DITHER_z_triangle);
case PF_Lookup:
if (depth == 8)
USE(smooth_LOOKUP8_z_triangle);
else
return (swrast_tri_func) NULL;
default:
return (swrast_tri_func) NULL;
}
}
if ( ctx->Light.ShadeModel==GL_FLAT
&& swrast->_RasterMask==DEPTH_BIT
&& ctx->Depth.Func==GL_LESS
&& ctx->Depth.Mask==GL_TRUE
&& ctx->Visual.depthBits == DEFAULT_SOFTWARE_DEPTH_BITS
&& ctx->Polygon.StippleFlag==GL_FALSE) {
switch (xmesa->pixelformat) {
case PF_Truecolor:
USE(flat_TRUECOLOR_z_triangle);
case PF_8A8B8G8R:
USE(flat_8A8B8G8R_z_triangle);
case PF_8A8R8G8B:
USE(flat_8A8R8G8B_z_triangle);
case PF_8R8G8B:
USE(flat_8R8G8B_z_triangle);
case PF_8R8G8B24:
USE(flat_8R8G8B24_z_triangle);
case PF_Dither_True:
USE(flat_TRUEDITHER_z_triangle);
case PF_5R6G5B:
USE(flat_5R6G5B_z_triangle);
case PF_Dither_5R6G5B:
USE(flat_DITHER_5R6G5B_z_triangle);
case PF_HPCR:
USE(flat_HPCR_z_triangle);
case PF_Dither:
if (depth == 8)
USE(flat_DITHER8_z_triangle);
else
USE(flat_DITHER_z_triangle);
case PF_Lookup:
if (depth == 8)
USE(flat_LOOKUP8_z_triangle);
else
return (swrast_tri_func) NULL;
default:
return (swrast_tri_func) NULL;
}
}
if ( swrast->_RasterMask==0 /* no depth test */
&& ctx->Light.ShadeModel==GL_SMOOTH
&& ctx->Polygon.StippleFlag==GL_FALSE) {
switch (xmesa->pixelformat) {
case PF_Truecolor:
USE(smooth_TRUECOLOR_triangle);
case PF_8A8B8G8R:
USE(smooth_8A8B8G8R_triangle);
case PF_8A8R8G8B:
USE(smooth_8A8R8G8B_triangle);
case PF_8R8G8B:
USE(smooth_8R8G8B_triangle);
case PF_8R8G8B24:
USE(smooth_8R8G8B24_triangle);
case PF_Dither_True:
USE(smooth_TRUEDITHER_triangle);
case PF_5R6G5B:
USE(smooth_5R6G5B_triangle);
case PF_Dither_5R6G5B:
USE(smooth_DITHER_5R6G5B_triangle);
case PF_HPCR:
USE(smooth_HPCR_triangle);
case PF_Dither:
if (depth == 8)
USE(smooth_DITHER8_triangle);
else
USE(smooth_DITHER_triangle);
case PF_Lookup:
if (depth == 8)
USE(smooth_LOOKUP8_triangle);
else
return (swrast_tri_func) NULL;
default:
return (swrast_tri_func) NULL;
}
}
if ( swrast->_RasterMask==0 /* no depth test */
&& ctx->Light.ShadeModel==GL_FLAT
&& ctx->Polygon.StippleFlag==GL_FALSE) {
switch (xmesa->pixelformat) {
case PF_Truecolor:
USE(flat_TRUECOLOR_triangle);
case PF_Dither_True:
USE(flat_TRUEDITHER_triangle);
case PF_8A8B8G8R:
USE(flat_8A8B8G8R_triangle);
case PF_8A8R8G8B:
USE(flat_8A8R8G8B_triangle);
case PF_8R8G8B:
USE(flat_8R8G8B_triangle);
case PF_8R8G8B24:
USE(flat_8R8G8B24_triangle);
case PF_5R6G5B:
USE(flat_5R6G5B_triangle);
case PF_Dither_5R6G5B:
USE(flat_DITHER_5R6G5B_triangle);
case PF_HPCR:
USE(flat_HPCR_triangle);
case PF_Dither:
if (depth == 8)
USE(flat_DITHER8_triangle);
else
USE(flat_DITHER_triangle);
case PF_Lookup:
if (depth == 8)
USE(flat_LOOKUP8_triangle);
else
return (swrast_tri_func) NULL;
default:
return (swrast_tri_func) NULL;
}
}
return (swrast_tri_func) NULL;
}
else {
/* draw to pixmap */
return (swrast_tri_func) NULL;
}
}
