2 * Mesa 3-D graphics library
5 * Copyright (C) 1999-2006 Brian Paul All Rights Reserved.
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the "Software"),
9 * to deal in the Software without restriction, including without limitation
10 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
11 * and/or sell copies of the Software, and to permit persons to whom the
12 * Software is furnished to do so, subject to the following conditions:
14 * The above copyright notice and this permission notice shall be included
15 * in all copies or substantial portions of the Software.
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
21 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
22 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
27 * This file contains "accelerated" point, line, and triangle functions.
28 * It should be fairly easy to write new special-purpose point, line or
29 * triangle functions and hook them into this module.
33 #include "glxheader.h"
34 #include "main/depth.h"
35 #include "main/macros.h"
36 #include "main/mtypes.h"
39 /* Internal swrast includes:
41 #include "swrast/s_depth.h"
42 #include "swrast/s_points.h"
43 #include "swrast/s_lines.h"
44 #include "swrast/s_context.h"
47 /**********************************************************************/
48 /*** Point rendering ***/
49 /**********************************************************************/
53 * Render an array of points into a pixmap, any pixel format.
56 /* XXX don't use this, it doesn't dither correctly */
57 static void draw_points_ANY_pixmap( struct gl_context *ctx, const SWvertex *vert )
59 XMesaContext xmesa = XMESA_CONTEXT(ctx);
60 XMesaDisplay *dpy = xmesa->xm_visual->display;
61 XMesaDrawable buffer = xmesa->xm_buffer->buffer;
62 XMesaGC gc = xmesa->xm_buffer->gc;
64 if (xmesa->xm_visual->mesa_visual.RGBAflag) {
66 const GLubyte *color = vert->color;
67 unsigned long pixel = xmesa_color_to_pixel( xmesa,
71 XMesaSetForeground( dpy, gc, pixel );
72 x = (GLint) vert->win[0];
73 y = YFLIP( xrb, (GLint) vert->win[1] );
74 XMesaDrawPoint( dpy, buffer, gc, x, y);
77 /* Color index mode */
79 XMesaSetForeground( dpy, gc, vert->index );
80 x = (GLint) vert->win[0];
81 y = YFLIP( xrb, (GLint) vert->win[1] );
82 XMesaDrawPoint( dpy, buffer, gc, x, y);
88 /* Override the swrast point-selection function. Try to use one of
89 * our internal point functions, otherwise fall back to the standard
92 void xmesa_choose_point( struct gl_context *ctx )
95 XMesaContext xmesa = XMESA_CONTEXT(ctx);
96 SWcontext *swrast = SWRAST_CONTEXT(ctx);
98 if (ctx->RenderMode == GL_RENDER
99 && ctx->Point.Size == 1.0F && !ctx->Point.SmoothFlag
100 && swrast->_RasterMask == 0
101 && !ctx->Texture._EnabledUnits
102 && xmesa->xm_buffer->buffer != XIMAGE) {
103 swrast->Point = draw_points_ANY_pixmap;
106 _swrast_choose_point( ctx );
109 _swrast_choose_point( ctx );
115 /**********************************************************************/
116 /*** Line rendering ***/
117 /**********************************************************************/
123 #define GET_XRB(XRB) struct xmesa_renderbuffer *XRB = \
124 xmesa_renderbuffer(ctx->DrawBuffer->_ColorDrawBuffers[0]->Wrapped)
128 * Draw a flat-shaded, PF_TRUECOLOR line into an XImage.
130 #define NAME flat_TRUECOLOR_line
132 XMesaContext xmesa = XMESA_CONTEXT(ctx); \
134 const GLubyte *color = vert1->color; \
135 unsigned long pixel; \
136 PACK_TRUECOLOR( pixel, color[0], color[1], color[2] );
138 #define PLOT(X,Y) XMesaPutPixel(xrb->ximage, X, YFLIP(xrb, Y), pixel );
139 #include "swrast/s_linetemp.h"
144 * Draw a flat-shaded, PF_8A8B8G8R line into an XImage.
146 #define NAME flat_8A8B8G8R_line
149 const GLubyte *color = vert1->color; \
150 GLuint pixel = PACK_8A8B8G8R(color[0], color[1], color[2], color[3]);
151 #define PIXEL_TYPE GLuint
152 #define BYTES_PER_ROW (xrb->ximage->bytes_per_line)
153 #define PIXEL_ADDRESS(X,Y) PIXEL_ADDR4(xrb, X, Y)
155 #define PLOT(X,Y) *pixelPtr = pixel;
156 #include "swrast/s_linetemp.h"
161 * Draw a flat-shaded, PF_8A8R8G8B line into an XImage.
163 #define NAME flat_8A8R8G8B_line
166 const GLubyte *color = vert1->color; \
167 GLuint pixel = PACK_8A8R8G8B(color[0], color[1], color[2], color[3]);
168 #define PIXEL_TYPE GLuint
169 #define BYTES_PER_ROW (xrb->ximage->bytes_per_line)
170 #define PIXEL_ADDRESS(X,Y) PIXEL_ADDR4(xrb, X, Y)
172 #define PLOT(X,Y) *pixelPtr = pixel;
173 #include "swrast/s_linetemp.h"
178 * Draw a flat-shaded, PF_8R8G8B line into an XImage.
180 #define NAME flat_8R8G8B_line
183 const GLubyte *color = vert1->color; \
184 GLuint pixel = PACK_8R8G8B( color[0], color[1], color[2] );
185 #define PIXEL_TYPE GLuint
186 #define BYTES_PER_ROW (xrb->ximage->bytes_per_line)
187 #define PIXEL_ADDRESS(X,Y) PIXEL_ADDR4(xrb, X, Y)
189 #define PLOT(X,Y) *pixelPtr = pixel;
190 #include "swrast/s_linetemp.h"
195 * Draw a flat-shaded, PF_8R8G8B24 line into an XImage.
197 #define NAME flat_8R8G8B24_line
200 const GLubyte *color = vert1->color;
201 #define PIXEL_TYPE bgr_t
202 #define BYTES_PER_ROW (xrb->ximage->bytes_per_line)
203 #define PIXEL_ADDRESS(X,Y) PIXEL_ADDR3(xrb, X, Y)
205 #define PLOT(X,Y) { \
206 pixelPtr->r = color[RCOMP]; \
207 pixelPtr->g = color[GCOMP]; \
208 pixelPtr->b = color[BCOMP]; \
210 #include "swrast/s_linetemp.h"
215 * Draw a flat-shaded, PF_5R6G5B line into an XImage.
217 #define NAME flat_5R6G5B_line
220 const GLubyte *color = vert1->color; \
221 GLushort pixel = PACK_5R6G5B( color[0], color[1], color[2] );
222 #define PIXEL_TYPE GLushort
223 #define BYTES_PER_ROW (xrb->ximage->bytes_per_line)
224 #define PIXEL_ADDRESS(X,Y) PIXEL_ADDR2(xrb, X, Y)
226 #define PLOT(X,Y) *pixelPtr = pixel;
227 #include "swrast/s_linetemp.h"
232 * Draw a flat-shaded, PF_DITHER_5R6G5B line into an XImage.
234 #define NAME flat_DITHER_5R6G5B_line
237 XMesaContext xmesa = XMESA_CONTEXT(ctx); \
238 const GLubyte *color = vert1->color;
239 #define PIXEL_TYPE GLushort
240 #define BYTES_PER_ROW (xrb->ximage->bytes_per_line)
241 #define PIXEL_ADDRESS(X,Y) PIXEL_ADDR2(xrb, X, Y)
243 #define PLOT(X,Y) PACK_TRUEDITHER( *pixelPtr, X, Y, color[0], color[1], color[2] );
244 #include "swrast/s_linetemp.h"
250 * Draw a flat-shaded, PF_DITHER 8-bit line into an XImage.
252 #define NAME flat_DITHER8_line
255 const GLubyte *color = vert1->color; \
256 GLint r = color[0], g = color[1], b = color[2]; \
258 #define PIXEL_TYPE GLubyte
259 #define BYTES_PER_ROW (xrb->ximage->bytes_per_line)
260 #define PIXEL_ADDRESS(X,Y) PIXEL_ADDR1(xrb, X, Y)
262 #define PLOT(X,Y) *pixelPtr = DITHER(X,Y,r,g,b);
263 #include "swrast/s_linetemp.h"
268 * Draw a flat-shaded, PF_LOOKUP 8-bit line into an XImage.
270 #define NAME flat_LOOKUP8_line
273 const GLubyte *color = vert1->color; \
276 pixel = (GLubyte) LOOKUP( color[0], color[1], color[2] );
277 #define PIXEL_TYPE GLubyte
278 #define BYTES_PER_ROW (xrb->ximage->bytes_per_line)
279 #define PIXEL_ADDRESS(X,Y) PIXEL_ADDR1(xrb, X,Y)
281 #define PLOT(X,Y) *pixelPtr = pixel;
282 #include "swrast/s_linetemp.h"
287 * Draw a flat-shaded, PF_HPCR line into an XImage.
289 #define NAME flat_HPCR_line
292 XMesaContext xmesa = XMESA_CONTEXT(ctx); \
293 const GLubyte *color = vert1->color; \
294 GLint r = color[0], g = color[1], b = color[2];
295 #define PIXEL_TYPE GLubyte
296 #define BYTES_PER_ROW (xrb->ximage->bytes_per_line)
297 #define PIXEL_ADDRESS(X,Y) PIXEL_ADDR1(xrb, X,Y)
299 #define PLOT(X,Y) *pixelPtr = (GLubyte) DITHER_HPCR(X,Y,r,g,b);
300 #include "swrast/s_linetemp.h"
306 * Draw a flat-shaded, Z-less, PF_TRUECOLOR line into an XImage.
308 #define NAME flat_TRUECOLOR_z_line
311 XMesaContext xmesa = XMESA_CONTEXT(ctx); \
312 const GLubyte *color = vert1->color; \
313 unsigned long pixel; \
314 PACK_TRUECOLOR( pixel, color[0], color[1], color[2] );
316 #define DEPTH_TYPE DEFAULT_SOFTWARE_DEPTH_TYPE
321 XMesaPutPixel(xrb->ximage, X, YFLIP(xrb, Y), pixel); \
323 #include "swrast/s_linetemp.h"
328 * Draw a flat-shaded, Z-less, PF_8A8B8G8R line into an XImage.
330 #define NAME flat_8A8B8G8R_z_line
333 const GLubyte *color = vert1->color; \
334 GLuint pixel = PACK_8A8B8G8R(color[0], color[1], color[2], color[3]);
336 #define DEPTH_TYPE DEFAULT_SOFTWARE_DEPTH_TYPE
337 #define PIXEL_TYPE GLuint
338 #define BYTES_PER_ROW (xrb->ximage->bytes_per_line)
339 #define PIXEL_ADDRESS(X,Y) PIXEL_ADDR4(xrb, X,Y)
346 #include "swrast/s_linetemp.h"
351 * Draw a flat-shaded, Z-less, PF_8A8R8G8B line into an XImage.
353 #define NAME flat_8A8R8G8B_z_line
356 const GLubyte *color = vert1->color; \
357 GLuint pixel = PACK_8A8R8G8B(color[0], color[1], color[2], color[3]);
359 #define DEPTH_TYPE DEFAULT_SOFTWARE_DEPTH_TYPE
360 #define PIXEL_TYPE GLuint
361 #define BYTES_PER_ROW (xrb->ximage->bytes_per_line)
362 #define PIXEL_ADDRESS(X,Y) PIXEL_ADDR4(xrb, X,Y)
369 #include "swrast/s_linetemp.h"
374 * Draw a flat-shaded, Z-less, PF_8R8G8B line into an XImage.
376 #define NAME flat_8R8G8B_z_line
379 const GLubyte *color = vert1->color; \
380 GLuint pixel = PACK_8R8G8B( color[0], color[1], color[2] );
382 #define DEPTH_TYPE DEFAULT_SOFTWARE_DEPTH_TYPE
383 #define PIXEL_TYPE GLuint
384 #define BYTES_PER_ROW (xrb->ximage->bytes_per_line)
385 #define PIXEL_ADDRESS(X,Y) PIXEL_ADDR4(xrb, X,Y)
392 #include "swrast/s_linetemp.h"
397 * Draw a flat-shaded, Z-less, PF_8R8G8B24 line into an XImage.
399 #define NAME flat_8R8G8B24_z_line
402 const GLubyte *color = vert1->color;
404 #define DEPTH_TYPE DEFAULT_SOFTWARE_DEPTH_TYPE
405 #define PIXEL_TYPE bgr_t
406 #define BYTES_PER_ROW (xrb->ximage->bytes_per_line)
407 #define PIXEL_ADDRESS(X,Y) PIXEL_ADDR3(xrb, X,Y)
412 pixelPtr->r = color[RCOMP]; \
413 pixelPtr->g = color[GCOMP]; \
414 pixelPtr->b = color[BCOMP]; \
416 #include "swrast/s_linetemp.h"
421 * Draw a flat-shaded, Z-less, PF_5R6G5B line into an XImage.
423 #define NAME flat_5R6G5B_z_line
426 const GLubyte *color = vert1->color; \
427 GLushort pixel = PACK_5R6G5B( color[0], color[1], color[2] );
429 #define DEPTH_TYPE DEFAULT_SOFTWARE_DEPTH_TYPE
430 #define PIXEL_TYPE GLushort
431 #define BYTES_PER_ROW (xrb->ximage->bytes_per_line)
432 #define PIXEL_ADDRESS(X,Y) PIXEL_ADDR2(xrb, X,Y)
439 #include "swrast/s_linetemp.h"
444 * Draw a flat-shaded, Z-less, PF_DITHER_5R6G5B line into an XImage.
446 #define NAME flat_DITHER_5R6G5B_z_line
449 XMesaContext xmesa = XMESA_CONTEXT(ctx); \
450 const GLubyte *color = vert1->color;
452 #define DEPTH_TYPE DEFAULT_SOFTWARE_DEPTH_TYPE
453 #define PIXEL_TYPE GLushort
454 #define BYTES_PER_ROW (xrb->ximage->bytes_per_line)
455 #define PIXEL_ADDRESS(X,Y) PIXEL_ADDR2(xrb, X,Y)
460 PACK_TRUEDITHER(*pixelPtr, X, Y, color[0], color[1], color[2]); \
462 #include "swrast/s_linetemp.h"
467 * Draw a flat-shaded, Z-less, PF_DITHER 8-bit line into an XImage.
469 #define NAME flat_DITHER8_z_line
472 const GLubyte *color = vert1->color; \
473 GLint r = color[0], g = color[1], b = color[2]; \
476 #define DEPTH_TYPE DEFAULT_SOFTWARE_DEPTH_TYPE
477 #define PIXEL_TYPE GLubyte
478 #define BYTES_PER_ROW (xrb->ximage->bytes_per_line)
479 #define PIXEL_ADDRESS(X,Y) PIXEL_ADDR1(xrb, X,Y)
484 *pixelPtr = (GLubyte) DITHER( X, Y, r, g, b); \
486 #include "swrast/s_linetemp.h"
491 * Draw a flat-shaded, Z-less, PF_LOOKUP 8-bit line into an XImage.
493 #define NAME flat_LOOKUP8_z_line
496 const GLubyte *color = vert1->color; \
499 pixel = (GLubyte) LOOKUP( color[0], color[1], color[2] );
501 #define DEPTH_TYPE DEFAULT_SOFTWARE_DEPTH_TYPE
502 #define PIXEL_TYPE GLubyte
503 #define BYTES_PER_ROW (xrb->ximage->bytes_per_line)
504 #define PIXEL_ADDRESS(X,Y) PIXEL_ADDR1(xrb, X,Y)
511 #include "swrast/s_linetemp.h"
516 * Draw a flat-shaded, Z-less, PF_HPCR line into an XImage.
518 #define NAME flat_HPCR_z_line
521 XMesaContext xmesa = XMESA_CONTEXT(ctx); \
522 const GLubyte *color = vert1->color; \
523 GLint r = color[0], g = color[1], b = color[2];
525 #define DEPTH_TYPE DEFAULT_SOFTWARE_DEPTH_TYPE
526 #define PIXEL_TYPE GLubyte
527 #define BYTES_PER_ROW (xrb->ximage->bytes_per_line)
528 #define PIXEL_ADDRESS(X,Y) PIXEL_ADDR1(xrb, X,Y)
533 *pixelPtr = (GLubyte) DITHER_HPCR( X, Y, r, g, b); \
535 #include "swrast/s_linetemp.h"
541 * Draw fast, XOR line with XDrawLine in front color buffer.
542 * WARNING: this isn't fully OpenGL conformant because different pixels
543 * will be hit versus using the other line functions.
544 * Don't use the code in X server GLcore module since we need a wrapper
545 * for the XSetLineAttributes() function call.
548 xor_line(struct gl_context *ctx, const SWvertex *vert0, const SWvertex *vert1)
550 XMesaContext xmesa = XMESA_CONTEXT(ctx);
551 XMesaDisplay *dpy = xmesa->xm_visual->display;
552 XMesaGC gc = xmesa->xm_buffer->gc;
554 unsigned long pixel = xmesa_color_to_pixel(ctx,
555 vert1->color[0], vert1->color[1],
556 vert1->color[2], vert1->color[3],
558 int x0 = (GLint) vert0->attrib[FRAG_ATTRIB_WPOS][0];
559 int y0 = YFLIP(xrb, (GLint) vert0->attrib[FRAG_ATTRIB_WPOS][1]);
560 int x1 = (GLint) vert1->attrib[FRAG_ATTRIB_WPOS][0];
561 int y1 = YFLIP(xrb, (GLint) vert1->attrib[FRAG_ATTRIB_WPOS][1]);
562 XMesaSetForeground(dpy, gc, pixel);
563 XMesaSetFunction(dpy, gc, GXxor);
564 XSetLineAttributes(dpy, gc, (int) ctx->Line.Width,
565 LineSolid, CapButt, JoinMiter);
566 XDrawLine(dpy, xrb->pixmap, gc, x0, y0, x1, y1);
567 XMesaSetFunction(dpy, gc, GXcopy); /* this gc is used elsewhere */
571 #endif /* CHAN_BITS == 8 */
575 * Return pointer to line drawing function, or NULL if we should use a
578 static swrast_line_func
579 get_line_func(struct gl_context *ctx)
582 SWcontext *swrast = SWRAST_CONTEXT(ctx);
583 XMesaContext xmesa = XMESA_CONTEXT(ctx);
584 XMesaBuffer xmbuf = XMESA_BUFFER(ctx->DrawBuffer);
585 const int depth = GET_VISUAL_DEPTH(xmesa->xm_visual);
586 const struct xmesa_renderbuffer *xrb;
588 if ((ctx->DrawBuffer->_ColorDrawBufferIndexes[0] != BUFFER_BIT_FRONT_LEFT) &&
589 (ctx->DrawBuffer->_ColorDrawBufferIndexes[0] != BUFFER_BIT_BACK_LEFT))
590 return (swrast_line_func) NULL;
591 if (ctx->RenderMode != GL_RENDER) return (swrast_line_func) NULL;
592 if (ctx->Line.SmoothFlag) return (swrast_line_func) NULL;
593 if (ctx->Texture._EnabledUnits) return (swrast_line_func) NULL;
594 if (ctx->Light.ShadeModel != GL_FLAT) return (swrast_line_func) NULL;
595 if (ctx->Line.StippleFlag) return (swrast_line_func) NULL;
596 if (swrast->_RasterMask & MULTI_DRAW_BIT) return (swrast_line_func) NULL;
597 if (xmbuf->swAlpha) return (swrast_line_func) NULL;
599 xrb = xmesa_renderbuffer(ctx->DrawBuffer->_ColorDrawBuffers[0]->Wrapped);
602 && swrast->_RasterMask==DEPTH_BIT
603 && ctx->Depth.Func==GL_LESS
604 && ctx->Depth.Mask==GL_TRUE
605 && ctx->Visual.depthBits == DEFAULT_SOFTWARE_DEPTH_BITS
606 && ctx->Line.Width==1.0F) {
607 switch (xmesa->pixelformat) {
609 return flat_TRUECOLOR_z_line;
611 return flat_8A8B8G8R_z_line;
613 return flat_8A8R8G8B_z_line;
615 return flat_8R8G8B_z_line;
617 return flat_8R8G8B24_z_line;
619 return flat_5R6G5B_z_line;
620 case PF_Dither_5R6G5B:
621 return flat_DITHER_5R6G5B_z_line;
623 return (depth==8) ? flat_DITHER8_z_line : (swrast_line_func) NULL;
625 return (depth==8) ? flat_LOOKUP8_z_line : (swrast_line_func) NULL;
627 return flat_HPCR_z_line;
629 return (swrast_line_func)NULL;
633 && swrast->_RasterMask==0
634 && ctx->Line.Width==1.0F) {
635 switch (xmesa->pixelformat) {
637 return flat_TRUECOLOR_line;
639 return flat_8A8B8G8R_line;
641 return flat_8A8R8G8B_line;
643 return flat_8R8G8B_line;
645 return flat_8R8G8B24_line;
647 return flat_5R6G5B_line;
648 case PF_Dither_5R6G5B:
649 return flat_DITHER_5R6G5B_line;
651 return (depth==8) ? flat_DITHER8_line : (swrast_line_func) NULL;
653 return (depth==8) ? flat_LOOKUP8_line : (swrast_line_func) NULL;
655 return flat_HPCR_line;
657 return (swrast_line_func)NULL;
661 if (ctx->DrawBuffer->_NumColorDrawBuffers == 1
662 && ctx->DrawBuffer->_ColorDrawBufferIndexes[0] == BUFFER_FRONT_LEFT
663 && swrast->_RasterMask == LOGIC_OP_BIT
664 && ctx->Color.LogicOp == GL_XOR
665 && !ctx->Line.StippleFlag
666 && !ctx->Line.SmoothFlag) {
670 #endif /* CHAN_BITS == 8 */
671 return (swrast_line_func) NULL;
676 * Override for the swrast line-selection function. Try to use one
677 * of our internal line functions, otherwise fall back to the
678 * standard swrast functions.
681 xmesa_choose_line(struct gl_context *ctx)
683 SWcontext *swrast = SWRAST_CONTEXT(ctx);
685 if (!(swrast->Line = get_line_func( ctx )))
686 _swrast_choose_line( ctx );