WebSVN - shark - Blame - Rev 1618 - /shark/branches/xen/ports/mesa/src/swrast/s

Rev	Author	Line No.	Line
57	pj	1	/* $Id: s_logic.c,v 1.1 2003-02-28 11:49:42 pj Exp $ */
		2
		3	/*
		4	* Mesa 3-D graphics library
		5	* Version: 4.1
		6	*
		7	* Copyright (C) 1999-2002 Brian Paul All Rights Reserved.
		8	*
		9	* Permission is hereby granted, free of charge, to any person obtaining a
		10	* copy of this software and associated documentation files (the "Software"),
		11	* to deal in the Software without restriction, including without limitation
		12	* the rights to use, copy, modify, merge, publish, distribute, sublicense,
		13	* and/or sell copies of the Software, and to permit persons to whom the
		14	* Software is furnished to do so, subject to the following conditions:
		15	*
		16	* The above copyright notice and this permission notice shall be included
		17	* in all copies or substantial portions of the Software.
		18	*
		19	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
		20	* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
		21	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
		22	* BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
		23	* AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
		24	* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
		25	*/
		26
		27
		28	#include "glheader.h"
		29	#include "context.h"
		30	#include "imports.h"
		31	#include "macros.h"
		32
		33	#include "s_alphabuf.h"
		34	#include "s_context.h"
		35	#include "s_logic.h"
		36	#include "s_span.h"
		37
		38
		39
		40	/*
		41	* Apply logic op to array of CI pixels.
		42	*/
		43	static void
		44	index_logicop( GLcontext *ctx, GLuint n, GLuint index[], const GLuint dest[],
		45	const GLubyte mask[] )
		46	{
		47	GLuint i;
		48	switch (ctx->Color.LogicOp) {
		49	case GL_CLEAR:
		50	for (i=0;i<n;i++) {
		51	if (mask[i]) {
		52	index[i] = 0;
		53	}
		54	}
		55	break;
		56	case GL_SET:
		57	for (i=0;i<n;i++) {
		58	if (mask[i]) {
		59	index[i] = ~0;
		60	}
		61	}
		62	break;
		63	case GL_COPY:
		64	/* do nothing */
		65	break;
		66	case GL_COPY_INVERTED:
		67	for (i=0;i<n;i++) {
		68	if (mask[i]) {
		69	index[i] = ~index[i];
		70	}
		71	}
		72	break;
		73	case GL_NOOP:
		74	for (i=0;i<n;i++) {
		75	if (mask[i]) {
		76	index[i] = dest[i];
		77	}
		78	}
		79	break;
		80	case GL_INVERT:
		81	for (i=0;i<n;i++) {
		82	if (mask[i]) {
		83	index[i] = ~dest[i];
		84	}
		85	}
		86	break;
		87	case GL_AND:
		88	for (i=0;i<n;i++) {
		89	if (mask[i]) {
		90	index[i] &= dest[i];
		91	}
		92	}
		93	break;
		94	case GL_NAND:
		95	for (i=0;i<n;i++) {
		96	if (mask[i]) {
		97	index[i] = ~(index[i] & dest[i]);
		98	}
		99	}
		100	break;
		101	case GL_OR:
		102	for (i=0;i<n;i++) {
		103	if (mask[i]) {
		104	index[i] \|= dest[i];
		105	}
		106	}
		107	break;
		108	case GL_NOR:
		109	for (i=0;i<n;i++) {
		110	if (mask[i]) {
		111	index[i] = ~(index[i] \| dest[i]);
		112	}
		113	}
		114	break;
		115	case GL_XOR:
		116	for (i=0;i<n;i++) {
		117	if (mask[i]) {
		118	index[i] ^= dest[i];
		119	}
		120	}
		121	break;
		122	case GL_EQUIV:
		123	for (i=0;i<n;i++) {
		124	if (mask[i]) {
		125	index[i] = ~(index[i] ^ dest[i]);
		126	}
		127	}
		128	break;
		129	case GL_AND_REVERSE:
		130	for (i=0;i<n;i++) {
		131	if (mask[i]) {
		132	index[i] = index[i] & ~dest[i];
		133	}
		134	}
		135	break;
		136	case GL_AND_INVERTED:
		137	for (i=0;i<n;i++) {
		138	if (mask[i]) {
		139	index[i] = ~index[i] & dest[i];
		140	}
		141	}
		142	break;
		143	case GL_OR_REVERSE:
		144	for (i=0;i<n;i++) {
		145	if (mask[i]) {
		146	index[i] = index[i] \| ~dest[i];
		147	}
		148	}
		149	break;
		150	case GL_OR_INVERTED:
		151	for (i=0;i<n;i++) {
		152	if (mask[i]) {
		153	index[i] = ~index[i] \| dest[i];
		154	}
		155	}
		156	break;
		157	default:
		158	_mesa_problem(ctx, "bad mode in index_logic()");
		159	}
		160	}
		161
		162
		163
		164	/*
		165	* Apply the current logic operator to a span of CI pixels. This is only
		166	* used if the device driver can't do logic ops.
		167	*/
		168	void
		169	_mesa_logicop_ci_span( GLcontext ctx, const struct sw_span span,
		170	GLuint index[] )
		171	{
		172	SWcontext *swrast = SWRAST_CONTEXT(ctx);
		173	GLuint dest[MAX_WIDTH];
		174
		175	ASSERT(span->end < MAX_WIDTH);
		176
		177	/* Read dest values from frame buffer */
		178	if (span->arrayMask & SPAN_XY) {
		179	(*swrast->Driver.ReadCI32Pixels)( ctx, span->end,
		180	span->array->x, span->array->y,
		181	dest, span->array->mask );
		182	}
		183	else {
		184	(*swrast->Driver.ReadCI32Span)( ctx, span->end, span->x, span->y, dest );
		185	}
		186
		187	index_logicop( ctx, span->end, index, dest, span->array->mask );
		188	}
		189
		190
		191
		192	/*
		193	* Apply logic operator to rgba pixels.
		194	* Input: ctx - the context
		195	* n - number of pixels
		196	* mask - pixel mask array
		197	* In/Out: src - incoming pixels which will be modified
		198	* Input: dest - frame buffer values
		199	*
		200	* Note: Since the R, G, B, and A channels are all treated the same we
		201	* process them as 4-byte GLuints instead of four GLubytes.
		202	*/
		203	static void
		204	rgba_logicop_ui( const GLcontext *ctx, GLuint n, const GLubyte mask[],
		205	GLuint src[], const GLuint dest[] )
		206	{
		207	GLuint i;
		208	switch (ctx->Color.LogicOp) {
		209	case GL_CLEAR:
		210	for (i=0;i<n;i++) {
		211	if (mask[i]) {
		212	src[i] = 0;
		213	}
		214	}
		215	break;
		216	case GL_SET:
		217	for (i=0;i<n;i++) {
		218	if (mask[i]) {
		219	src[i] = ~0;
		220	}
		221	}
		222	break;
		223	case GL_COPY:
		224	/* do nothing */
		225	break;
		226	case GL_COPY_INVERTED:
		227	for (i=0;i<n;i++) {
		228	if (mask[i]) {
		229	src[i] = ~src[i];
		230	}
		231	}
		232	break;
		233	case GL_NOOP:
		234	for (i=0;i<n;i++) {
		235	if (mask[i]) {
		236	src[i] = dest[i];
		237	}
		238	}
		239	break;
		240	case GL_INVERT:
		241	for (i=0;i<n;i++) {
		242	if (mask[i]) {
		243	src[i] = ~dest[i];
		244	}
		245	}
		246	break;
		247	case GL_AND:
		248	for (i=0;i<n;i++) {
		249	if (mask[i]) {
		250	src[i] &= dest[i];
		251	}
		252	}
		253	break;
		254	case GL_NAND:
		255	for (i=0;i<n;i++) {
		256	if (mask[i]) {
		257	src[i] = ~(src[i] & dest[i]);
		258	}
		259	}
		260	break;
		261	case GL_OR:
		262	for (i=0;i<n;i++) {
		263	if (mask[i]) {
		264	src[i]\|= dest[i];
		265	}
		266	}
		267	break;
		268	case GL_NOR:
		269	for (i=0;i<n;i++) {
		270	if (mask[i]) {
		271	src[i] = ~(src[i] \| dest[i]);
		272	}
		273	}
		274	break;
		275	case GL_XOR:
		276	for (i=0;i<n;i++) {
		277	if (mask[i]) {
		278	src[i] ^= dest[i];
		279	}
		280	}
		281	break;
		282	case GL_EQUIV:
		283	for (i=0;i<n;i++) {
		284	if (mask[i]) {
		285	src[i] = ~(src[i] ^ dest[i]);
		286	}
		287	}
		288	break;
		289	case GL_AND_REVERSE:
		290	for (i=0;i<n;i++) {
		291	if (mask[i]) {
		292	src[i] = src[i] & ~dest[i];
		293	}
		294	}
		295	break;
		296	case GL_AND_INVERTED:
		297	for (i=0;i<n;i++) {
		298	if (mask[i]) {
		299	src[i] = ~src[i] & dest[i];
		300	}
		301	}
		302	break;
		303	case GL_OR_REVERSE:
		304	for (i=0;i<n;i++) {
		305	if (mask[i]) {
		306	src[i] = src[i] \| ~dest[i];
		307	}
		308	}
		309	break;
		310	case GL_OR_INVERTED:
		311	for (i=0;i<n;i++) {
		312	if (mask[i]) {
		313	src[i] = ~src[i] \| dest[i];
		314	}
		315	}
		316	break;
		317	default:
		318	/* should never happen */
		319	_mesa_problem(ctx, "Bad function in rgba_logicop");
		320	}
		321	}
		322
		323
		324	/*
		325	* As above, but operate on GLchan values
		326	* Note: need to pass n = numPixels * 4.
		327	*/
		328	static void
		329	rgba_logicop_chan( const GLcontext *ctx, GLuint n, const GLubyte mask[],
		330	GLchan srcPtr[], const GLchan destPtr[] )
		331	{
		332	#if CHAN_TYPE == GL_FLOAT
		333	GLuint src = (GLuint ) srcPtr;
		334	const GLuint dest = (const GLuint ) destPtr;
		335	GLuint i;
		336	ASSERT(sizeof(GLfloat) == sizeof(GLuint));
		337	#else
		338	GLchan *src = srcPtr;
		339	const GLchan *dest = destPtr;
		340	GLuint i;
		341	#endif
		342
		343	switch (ctx->Color.LogicOp) {
		344	case GL_CLEAR:
		345	for (i=0;i<n;i++) {
		346	if (mask[i]) {
		347	src[i] = 0;
		348	}
		349	}
		350	break;
		351	case GL_SET:
		352	for (i=0;i<n;i++) {
		353	if (mask[i]) {
		354	src[i] = ~0;
		355	}
		356	}
		357	break;
		358	case GL_COPY:
		359	/* do nothing */
		360	break;
		361	case GL_COPY_INVERTED:
		362	for (i=0;i<n;i++) {
		363	if (mask[i]) {
		364	src[i] = ~src[i];
		365	}
		366	}
		367	break;
		368	case GL_NOOP:
		369	for (i=0;i<n;i++) {
		370	if (mask[i]) {
		371	src[i] = dest[i];
		372	}
		373	}
		374	break;
		375	case GL_INVERT:
		376	for (i=0;i<n;i++) {
		377	if (mask[i]) {
		378	src[i] = ~dest[i];
		379	}
		380	}
		381	break;
		382	case GL_AND:
		383	for (i=0;i<n;i++) {
		384	if (mask[i]) {
		385	src[i] &= dest[i];
		386	}
		387	}
		388	break;
		389	case GL_NAND:
		390	for (i=0;i<n;i++) {
		391	if (mask[i]) {
		392	src[i] = ~(src[i] & dest[i]);
		393	}
		394	}
		395	break;
		396	case GL_OR:
		397	for (i=0;i<n;i++) {
		398	if (mask[i]) {
		399	src[i]\|= dest[i];
		400	}
		401	}
		402	break;
		403	case GL_NOR:
		404	for (i=0;i<n;i++) {
		405	if (mask[i]) {
		406	src[i] = ~(src[i] \| dest[i]);
		407	}
		408	}
		409	break;
		410	case GL_XOR:
		411	for (i=0;i<n;i++) {
		412	if (mask[i]) {
		413	src[i] ^= dest[i];
		414	}
		415	}
		416	break;
		417	case GL_EQUIV:
		418	for (i=0;i<n;i++) {
		419	if (mask[i]) {
		420	src[i] = ~(src[i] ^ dest[i]);
		421	}
		422	}
		423	break;
		424	case GL_AND_REVERSE:
		425	for (i=0;i<n;i++) {
		426	if (mask[i]) {
		427	src[i] = src[i] & ~dest[i];
		428	}
		429	}
		430	break;
		431	case GL_AND_INVERTED:
		432	for (i=0;i<n;i++) {
		433	if (mask[i]) {
		434	src[i] = ~src[i] & dest[i];
		435	}
		436	}
		437	break;
		438	case GL_OR_REVERSE:
		439	for (i=0;i<n;i++) {
		440	if (mask[i]) {
		441	src[i] = src[i] \| ~dest[i];
		442	}
		443	}
		444	break;
		445	case GL_OR_INVERTED:
		446	for (i=0;i<n;i++) {
		447	if (mask[i]) {
		448	src[i] = ~src[i] \| dest[i];
		449	}
		450	}
		451	break;
		452	default:
		453	/* should never happen */
		454	_mesa_problem(ctx, "Bad function in rgba_logicop");
		455	}
		456	}
		457
		458
		459
		460	/*
		461	* Apply the current logic operator to a span of RGBA pixels.
		462	* We can handle horizontal runs of pixels (spans) or arrays of x/y
		463	* pixel coordinates.
		464	*/
		465	void
		466	_mesa_logicop_rgba_span( GLcontext ctx, const struct sw_span span,
		467	GLchan rgba[][4] )
		468	{
		469	SWcontext *swrast = SWRAST_CONTEXT(ctx);
		470	GLchan dest[MAX_WIDTH][4];
		471
		472	ASSERT(span->end < MAX_WIDTH);
		473	ASSERT(span->arrayMask & SPAN_RGBA);
		474
		475	if (span->arrayMask & SPAN_XY) {
		476	(*swrast->Driver.ReadRGBAPixels)(ctx, span->end,
		477	span->array->x, span->array->y,
		478	dest, span->array->mask);
		479	if (SWRAST_CONTEXT(ctx)->_RasterMask & ALPHABUF_BIT) {
		480	_mesa_read_alpha_pixels(ctx, span->end,
		481	span->array->x, span->array->y,
		482	dest, span->array->mask);
		483	}
		484	}
		485	else {
		486	_mesa_read_rgba_span(ctx, ctx->DrawBuffer, span->end,
		487	span->x, span->y, dest);
		488	}
		489
		490	if (sizeof(GLchan) * 4 == sizeof(GLuint)) {
		491	rgba_logicop_ui(ctx, span->end, span->array->mask,
		492	(GLuint ) rgba, (const GLuint ) dest);
		493	}
		494	else {
		495	rgba_logicop_chan(ctx, 4 * span->end, span->array->mask,
		496	(GLchan ) rgba, (const GLchan ) dest);
		497	}
		498	}

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(root)/shark/branches/xen/ports/mesa/src/swrast/s_logic.c - Rev 1618