SDL: src/render/software/SDL_blendline.c@710d00cb3a6a (annotated)

slouken@2888	1	/*
slouken@2888	2	SDL - Simple DirectMedia Layer
slouken@3697	3	Copyright (C) 1997-2010 Sam Lantinga
slouken@2888	4
slouken@2888	5	This library is free software; you can redistribute it and/or
slouken@2888	6	modify it under the terms of the GNU Lesser General Public
slouken@2888	7	License as published by the Free Software Foundation; either
slouken@2888	8	version 2.1 of the License, or (at your option) any later version.
slouken@2888	9
slouken@2888	10	This library is distributed in the hope that it will be useful,
slouken@2888	11	but WITHOUT ANY WARRANTY; without even the implied warranty of
slouken@2888	12	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
slouken@2888	13	Lesser General Public License for more details.
slouken@2888	14
slouken@2888	15	You should have received a copy of the GNU Lesser General Public
slouken@2888	16	License along with this library; if not, write to the Free Software
slouken@2888	17	Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
slouken@2888	18
slouken@2888	19	Sam Lantinga
slouken@2888	20	slouken@libsdl.org
slouken@2888	21	*/
slouken@2888	22	#include "SDL_config.h"
slouken@2888	23
slouken@5226	24	#if !SDL_RENDER_DISABLED
slouken@5226	25
slouken@2898	26	#include "SDL_draw.h"
slouken@5163	27	#include "SDL_blendline.h"
slouken@5166	28	#include "SDL_blendpoint.h"
slouken@2898	29
slouken@3596	30
slouken@3596	31	static void
slouken@3596	32	SDL_BlendLine_RGB2(SDL_Surface * dst, int x1, int y1, int x2, int y2,
slouken@4929	33	SDL_BlendMode blendMode, Uint8 _r, Uint8 _g, Uint8 _b, Uint8 _a,
slouken@3596	34	SDL_bool draw_end)
slouken@2898	35	{
slouken@3596	36	const SDL_PixelFormat *fmt = dst->format;
slouken@3596	37	unsigned r, g, b, a, inva;
slouken@3596	38
slouken@3596	39	if (blendMode == SDL_BLENDMODE_BLEND \|\| blendMode == SDL_BLENDMODE_ADD) {
slouken@3596	40	r = DRAW_MUL(_r, _a);
slouken@3596	41	g = DRAW_MUL(_g, _a);
slouken@3596	42	b = DRAW_MUL(_b, _a);
slouken@3596	43	a = _a;
slouken@3596	44	} else {
slouken@3596	45	r = _r;
slouken@3596	46	g = _g;
slouken@3596	47	b = _b;
slouken@3596	48	a = _a;
slouken@3596	49	}
slouken@3596	50	inva = (a ^ 0xff);
slouken@2888	51
slouken@3596	52	if (y1 == y2) {
slouken@3596	53	switch (blendMode) {
slouken@3596	54	case SDL_BLENDMODE_BLEND:
slouken@3596	55	HLINE(Uint16, DRAW_SETPIXEL_BLEND_RGB, draw_end);
slouken@3596	56	break;
slouken@3596	57	case SDL_BLENDMODE_ADD:
slouken@3596	58	HLINE(Uint16, DRAW_SETPIXEL_ADD_RGB, draw_end);
slouken@3596	59	break;
slouken@5184	60	case SDL_BLENDMODE_MOD:
slouken@5184	61	HLINE(Uint16, DRAW_SETPIXEL_MOD_RGB, draw_end);
slouken@5184	62	break;
slouken@3596	63	default:
slouken@3596	64	HLINE(Uint16, DRAW_SETPIXEL_RGB, draw_end);
slouken@3596	65	break;
slouken@3596	66	}
slouken@3596	67	} else if (x1 == x2) {
slouken@3596	68	switch (blendMode) {
slouken@3596	69	case SDL_BLENDMODE_BLEND:
slouken@3596	70	VLINE(Uint16, DRAW_SETPIXEL_BLEND_RGB, draw_end);
slouken@3596	71	break;
slouken@3596	72	case SDL_BLENDMODE_ADD:
slouken@3596	73	VLINE(Uint16, DRAW_SETPIXEL_ADD_RGB, draw_end);
slouken@3596	74	break;
slouken@5184	75	case SDL_BLENDMODE_MOD:
slouken@5184	76	VLINE(Uint16, DRAW_SETPIXEL_MOD_RGB, draw_end);
slouken@5184	77	break;
slouken@3596	78	default:
slouken@3596	79	VLINE(Uint16, DRAW_SETPIXEL_RGB, draw_end);
slouken@3596	80	break;
slouken@3596	81	}
slouken@3596	82	} else if (ABS(x1 - x2) == ABS(y1 - y2)) {
slouken@3596	83	switch (blendMode) {
slouken@3596	84	case SDL_BLENDMODE_BLEND:
slouken@3596	85	DLINE(Uint16, DRAW_SETPIXEL_BLEND_RGB, draw_end);
slouken@3596	86	break;
slouken@3596	87	case SDL_BLENDMODE_ADD:
slouken@3596	88	DLINE(Uint16, DRAW_SETPIXEL_ADD_RGB, draw_end);
slouken@3596	89	break;
slouken@5184	90	case SDL_BLENDMODE_MOD:
slouken@5184	91	DLINE(Uint16, DRAW_SETPIXEL_MOD_RGB, draw_end);
slouken@5184	92	break;
slouken@3596	93	default:
slouken@3596	94	DLINE(Uint16, DRAW_SETPIXEL_RGB, draw_end);
slouken@3596	95	break;
slouken@3596	96	}
slouken@3596	97	} else {
slouken@3596	98	switch (blendMode) {
slouken@3596	99	case SDL_BLENDMODE_BLEND:
slouken@3596	100	AALINE(x1, y1, x2, y2,
slouken@3596	101	DRAW_SETPIXELXY2_BLEND_RGB, DRAW_SETPIXELXY2_BLEND_RGB,
slouken@3596	102	draw_end);
slouken@3596	103	break;
slouken@3596	104	case SDL_BLENDMODE_ADD:
slouken@3596	105	AALINE(x1, y1, x2, y2,
slouken@3596	106	DRAW_SETPIXELXY2_ADD_RGB, DRAW_SETPIXELXY2_ADD_RGB,
slouken@3596	107	draw_end);
slouken@3596	108	break;
slouken@5184	109	case SDL_BLENDMODE_MOD:
slouken@5184	110	AALINE(x1, y1, x2, y2,
slouken@5184	111	DRAW_SETPIXELXY2_MOD_RGB, DRAW_SETPIXELXY2_MOD_RGB,
slouken@5184	112	draw_end);
slouken@5184	113	break;
slouken@3596	114	default:
slouken@3596	115	AALINE(x1, y1, x2, y2,
slouken@3596	116	DRAW_SETPIXELXY2_RGB, DRAW_SETPIXELXY2_BLEND_RGB,
slouken@3596	117	draw_end);
slouken@3596	118	break;
slouken@3596	119	}
slouken@2898	120	}
slouken@2898	121	}
slouken@2896	122
slouken@3596	123	static void
slouken@3596	124	SDL_BlendLine_RGB555(SDL_Surface * dst, int x1, int y1, int x2, int y2,
slouken@4929	125	SDL_BlendMode blendMode, Uint8 _r, Uint8 _g, Uint8 _b, Uint8 _a,
slouken@3594	126	SDL_bool draw_end)
slouken@2898	127	{
slouken@3596	128	const SDL_PixelFormat *fmt = dst->format;
slouken@3596	129	unsigned r, g, b, a, inva;
slouken@2898	130
slouken@3596	131	if (blendMode == SDL_BLENDMODE_BLEND \|\| blendMode == SDL_BLENDMODE_ADD) {
slouken@3596	132	r = DRAW_MUL(_r, _a);
slouken@3596	133	g = DRAW_MUL(_g, _a);
slouken@3596	134	b = DRAW_MUL(_b, _a);
slouken@3596	135	a = _a;
slouken@3596	136	} else {
slouken@3596	137	r = _r;
slouken@3596	138	g = _g;
slouken@3596	139	b = _b;
slouken@3596	140	a = _a;
slouken@2898	141	}
slouken@3596	142	inva = (a ^ 0xff);
slouken@2896	143
slouken@3596	144	if (y1 == y2) {
slouken@3596	145	switch (blendMode) {
slouken@3596	146	case SDL_BLENDMODE_BLEND:
slouken@3596	147	HLINE(Uint16, DRAW_SETPIXEL_BLEND_RGB555, draw_end);
slouken@3596	148	break;
slouken@3596	149	case SDL_BLENDMODE_ADD:
slouken@3596	150	HLINE(Uint16, DRAW_SETPIXEL_ADD_RGB555, draw_end);
slouken@3596	151	break;
slouken@5184	152	case SDL_BLENDMODE_MOD:
slouken@5184	153	HLINE(Uint16, DRAW_SETPIXEL_MOD_RGB555, draw_end);
slouken@5184	154	break;
slouken@3596	155	default:
slouken@3596	156	HLINE(Uint16, DRAW_SETPIXEL_RGB555, draw_end);
slouken@3596	157	break;
slouken@3596	158	}
slouken@3596	159	} else if (x1 == x2) {
slouken@3596	160	switch (blendMode) {
slouken@3596	161	case SDL_BLENDMODE_BLEND:
slouken@3596	162	VLINE(Uint16, DRAW_SETPIXEL_BLEND_RGB555, draw_end);
slouken@3596	163	break;
slouken@3596	164	case SDL_BLENDMODE_ADD:
slouken@3596	165	VLINE(Uint16, DRAW_SETPIXEL_ADD_RGB555, draw_end);
slouken@3596	166	break;
slouken@5184	167	case SDL_BLENDMODE_MOD:
slouken@5184	168	VLINE(Uint16, DRAW_SETPIXEL_MOD_RGB555, draw_end);
slouken@5184	169	break;
slouken@3596	170	default:
slouken@3596	171	VLINE(Uint16, DRAW_SETPIXEL_RGB555, draw_end);
slouken@3596	172	break;
slouken@3596	173	}
slouken@3596	174	} else if (ABS(x1 - x2) == ABS(y1 - y2)) {
slouken@3596	175	switch (blendMode) {
slouken@3596	176	case SDL_BLENDMODE_BLEND:
slouken@3596	177	DLINE(Uint16, DRAW_SETPIXEL_BLEND_RGB555, draw_end);
slouken@3596	178	break;
slouken@3596	179	case SDL_BLENDMODE_ADD:
slouken@3596	180	DLINE(Uint16, DRAW_SETPIXEL_ADD_RGB555, draw_end);
slouken@3596	181	break;
slouken@5184	182	case SDL_BLENDMODE_MOD:
slouken@5184	183	DLINE(Uint16, DRAW_SETPIXEL_MOD_RGB555, draw_end);
slouken@5184	184	break;
slouken@3596	185	default:
slouken@3596	186	DLINE(Uint16, DRAW_SETPIXEL_RGB555, draw_end);
slouken@3596	187	break;
slouken@3596	188	}
slouken@3596	189	} else {
slouken@3596	190	switch (blendMode) {
slouken@3596	191	case SDL_BLENDMODE_BLEND:
slouken@3596	192	AALINE(x1, y1, x2, y2,
slouken@3596	193	DRAW_SETPIXELXY_BLEND_RGB555, DRAW_SETPIXELXY_BLEND_RGB555,
slouken@3596	194	draw_end);
slouken@3596	195	break;
slouken@3596	196	case SDL_BLENDMODE_ADD:
slouken@3596	197	AALINE(x1, y1, x2, y2,
slouken@3596	198	DRAW_SETPIXELXY_ADD_RGB555, DRAW_SETPIXELXY_ADD_RGB555,
slouken@3596	199	draw_end);
slouken@3596	200	break;
slouken@5184	201	case SDL_BLENDMODE_MOD:
slouken@5184	202	AALINE(x1, y1, x2, y2,
slouken@5184	203	DRAW_SETPIXELXY_MOD_RGB555, DRAW_SETPIXELXY_MOD_RGB555,
slouken@5184	204	draw_end);
slouken@5184	205	break;
slouken@3596	206	default:
slouken@3596	207	AALINE(x1, y1, x2, y2,
slouken@3596	208	DRAW_SETPIXELXY_RGB555, DRAW_SETPIXELXY_BLEND_RGB555,
slouken@3596	209	draw_end);
slouken@3596	210	break;
slouken@3596	211	}
slouken@2899	212	}
slouken@2899	213	}
slouken@2899	214
slouken@3596	215	static void
slouken@3596	216	SDL_BlendLine_RGB565(SDL_Surface * dst, int x1, int y1, int x2, int y2,
slouken@4929	217	SDL_BlendMode blendMode, Uint8 _r, Uint8 _g, Uint8 _b, Uint8 _a,
slouken@3596	218	SDL_bool draw_end)
slouken@2898	219	{
slouken@3596	220	const SDL_PixelFormat *fmt = dst->format;
slouken@3596	221	unsigned r, g, b, a, inva;
slouken@2896	222
slouken@3596	223	if (blendMode == SDL_BLENDMODE_BLEND \|\| blendMode == SDL_BLENDMODE_ADD) {
slouken@3596	224	r = DRAW_MUL(_r, _a);
slouken@3596	225	g = DRAW_MUL(_g, _a);
slouken@3596	226	b = DRAW_MUL(_b, _a);
slouken@3596	227	a = _a;
slouken@3596	228	} else {
slouken@3596	229	r = _r;
slouken@3596	230	g = _g;
slouken@3596	231	b = _b;
slouken@3596	232	a = _a;
slouken@3596	233	}
slouken@3596	234	inva = (a ^ 0xff);
slouken@3596	235
slouken@3596	236	if (y1 == y2) {
slouken@2898	237	switch (blendMode) {
slouken@2898	238	case SDL_BLENDMODE_BLEND:
slouken@3596	239	HLINE(Uint16, DRAW_SETPIXEL_BLEND_RGB565, draw_end);
slouken@2898	240	break;
slouken@2898	241	case SDL_BLENDMODE_ADD:
slouken@3596	242	HLINE(Uint16, DRAW_SETPIXEL_ADD_RGB565, draw_end);
slouken@2898	243	break;
slouken@5184	244	case SDL_BLENDMODE_MOD:
slouken@5184	245	HLINE(Uint16, DRAW_SETPIXEL_MOD_RGB565, draw_end);
slouken@5184	246	break;
slouken@2898	247	default:
slouken@3596	248	HLINE(Uint16, DRAW_SETPIXEL_RGB565, draw_end);
slouken@2898	249	break;
slouken@2898	250	}
slouken@3596	251	} else if (x1 == x2) {
slouken@2898	252	switch (blendMode) {
slouken@2898	253	case SDL_BLENDMODE_BLEND:
slouken@3596	254	VLINE(Uint16, DRAW_SETPIXEL_BLEND_RGB565, draw_end);
slouken@3596	255	break;
slouken@3596	256	case SDL_BLENDMODE_ADD:
slouken@3596	257	VLINE(Uint16, DRAW_SETPIXEL_ADD_RGB565, draw_end);
slouken@3596	258	break;
slouken@5184	259	case SDL_BLENDMODE_MOD:
slouken@5184	260	VLINE(Uint16, DRAW_SETPIXEL_MOD_RGB565, draw_end);
slouken@5184	261	break;
slouken@3596	262	default:
slouken@3596	263	VLINE(Uint16, DRAW_SETPIXEL_RGB565, draw_end);
slouken@3596	264	break;
slouken@3596	265	}
slouken@3596	266	} else if (ABS(x1 - x2) == ABS(y1 - y2)) {
slouken@3596	267	switch (blendMode) {
slouken@3596	268	case SDL_BLENDMODE_BLEND:
slouken@3596	269	DLINE(Uint16, DRAW_SETPIXEL_BLEND_RGB565, draw_end);
slouken@2898	270	break;
slouken@2898	271	case SDL_BLENDMODE_ADD:
slouken@3596	272	DLINE(Uint16, DRAW_SETPIXEL_ADD_RGB565, draw_end);
slouken@2898	273	break;
slouken@5184	274	case SDL_BLENDMODE_MOD:
slouken@5184	275	DLINE(Uint16, DRAW_SETPIXEL_MOD_RGB565, draw_end);
slouken@5184	276	break;
slouken@2898	277	default:
slouken@3596	278	DLINE(Uint16, DRAW_SETPIXEL_RGB565, draw_end);
slouken@2898	279	break;
slouken@2898	280	}
slouken@3596	281	} else {
slouken@3596	282	switch (blendMode) {
slouken@3596	283	case SDL_BLENDMODE_BLEND:
slouken@3596	284	AALINE(x1, y1, x2, y2,
slouken@3596	285	DRAW_SETPIXELXY_BLEND_RGB565, DRAW_SETPIXELXY_BLEND_RGB565,
slouken@3596	286	draw_end);
slouken@3596	287	break;
slouken@3596	288	case SDL_BLENDMODE_ADD:
slouken@3596	289	AALINE(x1, y1, x2, y2,
slouken@3596	290	DRAW_SETPIXELXY_ADD_RGB565, DRAW_SETPIXELXY_ADD_RGB565,
slouken@3596	291	draw_end);
slouken@3596	292	break;
slouken@5184	293	case SDL_BLENDMODE_MOD:
slouken@5184	294	AALINE(x1, y1, x2, y2,
slouken@5184	295	DRAW_SETPIXELXY_MOD_RGB565, DRAW_SETPIXELXY_MOD_RGB565,
slouken@5184	296	draw_end);
slouken@5184	297	break;
slouken@3596	298	default:
slouken@3596	299	AALINE(x1, y1, x2, y2,
slouken@3596	300	DRAW_SETPIXELXY_RGB565, DRAW_SETPIXELXY_BLEND_RGB565,
slouken@3596	301	draw_end);
slouken@3596	302	break;
slouken@3596	303	}
slouken@2898	304	}
slouken@2898	305	}
slouken@2896	306
slouken@3596	307	static void
slouken@3596	308	SDL_BlendLine_RGB4(SDL_Surface * dst, int x1, int y1, int x2, int y2,
slouken@4929	309	SDL_BlendMode blendMode, Uint8 _r, Uint8 _g, Uint8 _b, Uint8 _a,
slouken@3594	310	SDL_bool draw_end)
slouken@2898	311	{
slouken@3596	312	const SDL_PixelFormat *fmt = dst->format;
slouken@3596	313	unsigned r, g, b, a, inva;
slouken@3596	314
slouken@3596	315	if (blendMode == SDL_BLENDMODE_BLEND \|\| blendMode == SDL_BLENDMODE_ADD) {
slouken@3596	316	r = DRAW_MUL(_r, _a);
slouken@3596	317	g = DRAW_MUL(_g, _a);
slouken@3596	318	b = DRAW_MUL(_b, _a);
slouken@3596	319	a = _a;
slouken@3596	320	} else {
slouken@3596	321	r = _r;
slouken@3596	322	g = _g;
slouken@3596	323	b = _b;
slouken@3596	324	a = _a;
slouken@3596	325	}
slouken@3596	326	inva = (a ^ 0xff);
slouken@2896	327
slouken@3596	328	if (y1 == y2) {
slouken@3596	329	switch (blendMode) {
slouken@3596	330	case SDL_BLENDMODE_BLEND:
slouken@3596	331	HLINE(Uint32, DRAW_SETPIXEL_BLEND_RGB, draw_end);
slouken@3596	332	break;
slouken@3596	333	case SDL_BLENDMODE_ADD:
slouken@3596	334	HLINE(Uint32, DRAW_SETPIXEL_ADD_RGB, draw_end);
slouken@3596	335	break;
slouken@5184	336	case SDL_BLENDMODE_MOD:
slouken@5184	337	HLINE(Uint32, DRAW_SETPIXEL_MOD_RGB, draw_end);
slouken@5184	338	break;
slouken@3596	339	default:
slouken@3596	340	HLINE(Uint32, DRAW_SETPIXEL_RGB, draw_end);
slouken@3596	341	break;
slouken@3596	342	}
slouken@3596	343	} else if (x1 == x2) {
slouken@3596	344	switch (blendMode) {
slouken@3596	345	case SDL_BLENDMODE_BLEND:
slouken@3596	346	VLINE(Uint32, DRAW_SETPIXEL_BLEND_RGB, draw_end);
slouken@3596	347	break;
slouken@3596	348	case SDL_BLENDMODE_ADD:
slouken@3596	349	VLINE(Uint32, DRAW_SETPIXEL_ADD_RGB, draw_end);
slouken@3596	350	break;
slouken@5184	351	case SDL_BLENDMODE_MOD:
slouken@5184	352	VLINE(Uint32, DRAW_SETPIXEL_MOD_RGB, draw_end);
slouken@5184	353	break;
slouken@3596	354	default:
slouken@3596	355	VLINE(Uint32, DRAW_SETPIXEL_RGB, draw_end);
slouken@3596	356	break;
slouken@3596	357	}
slouken@3596	358	} else if (ABS(x1 - x2) == ABS(y1 - y2)) {
slouken@3596	359	switch (blendMode) {
slouken@3596	360	case SDL_BLENDMODE_BLEND:
slouken@3596	361	DLINE(Uint32, DRAW_SETPIXEL_BLEND_RGB, draw_end);
slouken@3596	362	break;
slouken@3596	363	case SDL_BLENDMODE_ADD:
slouken@3596	364	DLINE(Uint32, DRAW_SETPIXEL_ADD_RGB, draw_end);
slouken@3596	365	break;
slouken@5184	366	case SDL_BLENDMODE_MOD:
slouken@5184	367	DLINE(Uint32, DRAW_SETPIXEL_MOD_RGB, draw_end);
slouken@5184	368	break;
slouken@3596	369	default:
slouken@3596	370	DLINE(Uint32, DRAW_SETPIXEL_RGB, draw_end);
slouken@3596	371	break;
slouken@3596	372	}
slouken@3596	373	} else {
slouken@2898	374	switch (blendMode) {
slouken@2898	375	case SDL_BLENDMODE_BLEND:
slouken@3596	376	AALINE(x1, y1, x2, y2,
slouken@3596	377	DRAW_SETPIXELXY4_BLEND_RGB, DRAW_SETPIXELXY4_BLEND_RGB,
slouken@3596	378	draw_end);
slouken@3596	379	break;
slouken@3596	380	case SDL_BLENDMODE_ADD:
slouken@3596	381	AALINE(x1, y1, x2, y2,
slouken@3596	382	DRAW_SETPIXELXY4_ADD_RGB, DRAW_SETPIXELXY4_ADD_RGB,
slouken@3596	383	draw_end);
slouken@3596	384	break;
slouken@5184	385	case SDL_BLENDMODE_MOD:
slouken@5184	386	AALINE(x1, y1, x2, y2,
slouken@5184	387	DRAW_SETPIXELXY4_MOD_RGB, DRAW_SETPIXELXY4_MOD_RGB,
slouken@5184	388	draw_end);
slouken@5184	389	break;
slouken@3596	390	default:
slouken@3596	391	AALINE(x1, y1, x2, y2,
slouken@3596	392	DRAW_SETPIXELXY4_RGB, DRAW_SETPIXELXY4_BLEND_RGB,
slouken@3596	393	draw_end);
slouken@3596	394	break;
slouken@3596	395	}
slouken@3596	396	}
slouken@3596	397	}
slouken@3596	398
slouken@3596	399	static void
slouken@3596	400	SDL_BlendLine_RGBA4(SDL_Surface * dst, int x1, int y1, int x2, int y2,
slouken@4929	401	SDL_BlendMode blendMode, Uint8 _r, Uint8 _g, Uint8 _b, Uint8 _a,
slouken@3596	402	SDL_bool draw_end)
slouken@3596	403	{
slouken@3596	404	const SDL_PixelFormat *fmt = dst->format;
slouken@3596	405	unsigned r, g, b, a, inva;
slouken@3596	406
slouken@3596	407	if (blendMode == SDL_BLENDMODE_BLEND \|\| blendMode == SDL_BLENDMODE_ADD) {
slouken@3596	408	r = DRAW_MUL(_r, _a);
slouken@3596	409	g = DRAW_MUL(_g, _a);
slouken@3596	410	b = DRAW_MUL(_b, _a);
slouken@3596	411	a = _a;
slouken@3596	412	} else {
slouken@3596	413	r = _r;
slouken@3596	414	g = _g;
slouken@3596	415	b = _b;
slouken@3596	416	a = _a;
slouken@3596	417	}
slouken@3596	418	inva = (a ^ 0xff);
slouken@3596	419
slouken@3596	420	if (y1 == y2) {
slouken@3596	421	switch (blendMode) {
slouken@3596	422	case SDL_BLENDMODE_BLEND:
slouken@3596	423	HLINE(Uint32, DRAW_SETPIXEL_BLEND_RGBA, draw_end);
slouken@3596	424	break;
slouken@3596	425	case SDL_BLENDMODE_ADD:
slouken@3596	426	HLINE(Uint32, DRAW_SETPIXEL_ADD_RGBA, draw_end);
slouken@3596	427	break;
slouken@5184	428	case SDL_BLENDMODE_MOD:
slouken@5184	429	HLINE(Uint32, DRAW_SETPIXEL_MOD_RGBA, draw_end);
slouken@5184	430	break;
slouken@3596	431	default:
slouken@3596	432	HLINE(Uint32, DRAW_SETPIXEL_RGBA, draw_end);
slouken@3596	433	break;
slouken@3596	434	}
slouken@3596	435	} else if (x1 == x2) {
slouken@3596	436	switch (blendMode) {
slouken@3596	437	case SDL_BLENDMODE_BLEND:
slouken@3596	438	VLINE(Uint32, DRAW_SETPIXEL_BLEND_RGBA, draw_end);
slouken@3596	439	break;
slouken@3596	440	case SDL_BLENDMODE_ADD:
slouken@3596	441	VLINE(Uint32, DRAW_SETPIXEL_ADD_RGBA, draw_end);
slouken@3596	442	break;
slouken@5184	443	case SDL_BLENDMODE_MOD:
slouken@5184	444	VLINE(Uint32, DRAW_SETPIXEL_MOD_RGBA, draw_end);
slouken@5184	445	break;
slouken@3596	446	default:
slouken@3596	447	VLINE(Uint32, DRAW_SETPIXEL_RGBA, draw_end);
slouken@3596	448	break;
slouken@3596	449	}
slouken@3596	450	} else if (ABS(x1 - x2) == ABS(y1 - y2)) {
slouken@3596	451	switch (blendMode) {
slouken@3596	452	case SDL_BLENDMODE_BLEND:
slouken@3596	453	DLINE(Uint32, DRAW_SETPIXEL_BLEND_RGBA, draw_end);
slouken@3596	454	break;
slouken@3596	455	case SDL_BLENDMODE_ADD:
slouken@3596	456	DLINE(Uint32, DRAW_SETPIXEL_ADD_RGBA, draw_end);
slouken@3596	457	break;
slouken@5184	458	case SDL_BLENDMODE_MOD:
slouken@5184	459	DLINE(Uint32, DRAW_SETPIXEL_MOD_RGBA, draw_end);
slouken@5184	460	break;
slouken@3596	461	default:
slouken@3596	462	DLINE(Uint32, DRAW_SETPIXEL_RGBA, draw_end);
slouken@3596	463	break;
slouken@3596	464	}
slouken@3596	465	} else {
slouken@3596	466	switch (blendMode) {
slouken@3596	467	case SDL_BLENDMODE_BLEND:
slouken@3596	468	AALINE(x1, y1, x2, y2,
slouken@3596	469	DRAW_SETPIXELXY4_BLEND_RGBA, DRAW_SETPIXELXY4_BLEND_RGBA,
slouken@3596	470	draw_end);
slouken@2898	471	break;
slouken@2898	472	case SDL_BLENDMODE_ADD:
slouken@3596	473	AALINE(x1, y1, x2, y2,
slouken@3596	474	DRAW_SETPIXELXY4_ADD_RGBA, DRAW_SETPIXELXY4_ADD_RGBA,
slouken@3596	475	draw_end);
slouken@3596	476	break;
slouken@5184	477	case SDL_BLENDMODE_MOD:
slouken@5184	478	AALINE(x1, y1, x2, y2,
slouken@5184	479	DRAW_SETPIXELXY4_MOD_RGBA, DRAW_SETPIXELXY4_MOD_RGBA,
slouken@5184	480	draw_end);
slouken@5184	481	break;
slouken@3596	482	default:
slouken@3596	483	AALINE(x1, y1, x2, y2,
slouken@3596	484	DRAW_SETPIXELXY4_RGBA, DRAW_SETPIXELXY4_BLEND_RGBA,
slouken@3596	485	draw_end);
slouken@3596	486	break;
slouken@3596	487	}
slouken@3596	488	}
slouken@3596	489	}
slouken@3596	490
slouken@3596	491	static void
slouken@3596	492	SDL_BlendLine_RGB888(SDL_Surface * dst, int x1, int y1, int x2, int y2,
slouken@4929	493	SDL_BlendMode blendMode, Uint8 _r, Uint8 _g, Uint8 _b, Uint8 _a,
slouken@3596	494	SDL_bool draw_end)
slouken@3596	495	{
slouken@3596	496	const SDL_PixelFormat *fmt = dst->format;
slouken@3596	497	unsigned r, g, b, a, inva;
slouken@3596	498
slouken@3596	499	if (blendMode == SDL_BLENDMODE_BLEND \|\| blendMode == SDL_BLENDMODE_ADD) {
slouken@3596	500	r = DRAW_MUL(_r, _a);
slouken@3596	501	g = DRAW_MUL(_g, _a);
slouken@3596	502	b = DRAW_MUL(_b, _a);
slouken@3596	503	a = _a;
slouken@3596	504	} else {
slouken@3596	505	r = _r;
slouken@3596	506	g = _g;
slouken@3596	507	b = _b;
slouken@3596	508	a = _a;
slouken@3596	509	}
slouken@3596	510	inva = (a ^ 0xff);
slouken@3596	511
slouken@3596	512	if (y1 == y2) {
slouken@3596	513	switch (blendMode) {
slouken@3596	514	case SDL_BLENDMODE_BLEND:
slouken@3596	515	HLINE(Uint32, DRAW_SETPIXEL_BLEND_RGB888, draw_end);
slouken@3596	516	break;
slouken@3596	517	case SDL_BLENDMODE_ADD:
slouken@3596	518	HLINE(Uint32, DRAW_SETPIXEL_ADD_RGB888, draw_end);
slouken@2898	519	break;
slouken@5184	520	case SDL_BLENDMODE_MOD:
slouken@5184	521	HLINE(Uint32, DRAW_SETPIXEL_MOD_RGB888, draw_end);
slouken@5184	522	break;
slouken@3596	523	default:
slouken@3596	524	HLINE(Uint32, DRAW_SETPIXEL_RGB888, draw_end);
slouken@3596	525	break;
slouken@3596	526	}
slouken@3596	527	} else if (x1 == x2) {
slouken@3596	528	switch (blendMode) {
slouken@3596	529	case SDL_BLENDMODE_BLEND:
slouken@3596	530	VLINE(Uint32, DRAW_SETPIXEL_BLEND_RGB888, draw_end);
slouken@3596	531	break;
slouken@3596	532	case SDL_BLENDMODE_ADD:
slouken@3596	533	VLINE(Uint32, DRAW_SETPIXEL_ADD_RGB888, draw_end);
slouken@3596	534	break;
slouken@5184	535	case SDL_BLENDMODE_MOD:
slouken@5184	536	VLINE(Uint32, DRAW_SETPIXEL_MOD_RGB888, draw_end);
slouken@5184	537	break;
slouken@3596	538	default:
slouken@3596	539	VLINE(Uint32, DRAW_SETPIXEL_RGB888, draw_end);
slouken@3596	540	break;
slouken@3596	541	}
slouken@3596	542	} else if (ABS(x1 - x2) == ABS(y1 - y2)) {
slouken@3596	543	switch (blendMode) {
slouken@3596	544	case SDL_BLENDMODE_BLEND:
slouken@3596	545	DLINE(Uint32, DRAW_SETPIXEL_BLEND_RGB888, draw_end);
slouken@3596	546	break;
slouken@3596	547	case SDL_BLENDMODE_ADD:
slouken@3596	548	DLINE(Uint32, DRAW_SETPIXEL_ADD_RGB888, draw_end);
slouken@3596	549	break;
slouken@5184	550	case SDL_BLENDMODE_MOD:
slouken@5184	551	DLINE(Uint32, DRAW_SETPIXEL_MOD_RGB888, draw_end);
slouken@5184	552	break;
slouken@3596	553	default:
slouken@3596	554	DLINE(Uint32, DRAW_SETPIXEL_RGB888, draw_end);
slouken@3596	555	break;
slouken@3596	556	}
slouken@3596	557	} else {
slouken@3596	558	switch (blendMode) {
slouken@3596	559	case SDL_BLENDMODE_BLEND:
slouken@3596	560	AALINE(x1, y1, x2, y2,
slouken@3596	561	DRAW_SETPIXELXY_BLEND_RGB888, DRAW_SETPIXELXY_BLEND_RGB888,
slouken@3596	562	draw_end);
slouken@3596	563	break;
slouken@3596	564	case SDL_BLENDMODE_ADD:
slouken@3596	565	AALINE(x1, y1, x2, y2,
slouken@3596	566	DRAW_SETPIXELXY_ADD_RGB888, DRAW_SETPIXELXY_ADD_RGB888,
slouken@3596	567	draw_end);
slouken@3596	568	break;
slouken@5184	569	case SDL_BLENDMODE_MOD:
slouken@5184	570	AALINE(x1, y1, x2, y2,
slouken@5184	571	DRAW_SETPIXELXY_MOD_RGB888, DRAW_SETPIXELXY_MOD_RGB888,
slouken@5184	572	draw_end);
slouken@5184	573	break;
slouken@2898	574	default:
slouken@3596	575	AALINE(x1, y1, x2, y2,
slouken@3596	576	DRAW_SETPIXELXY_RGB888, DRAW_SETPIXELXY_BLEND_RGB888,
slouken@3596	577	draw_end);
slouken@3596	578	break;
slouken@3596	579	}
slouken@3596	580	}
slouken@3596	581	}
slouken@3596	582
slouken@3596	583	static void
slouken@3596	584	SDL_BlendLine_ARGB8888(SDL_Surface * dst, int x1, int y1, int x2, int y2,
slouken@4929	585	SDL_BlendMode blendMode, Uint8 _r, Uint8 _g, Uint8 _b, Uint8 _a,
slouken@3596	586	SDL_bool draw_end)
slouken@3596	587	{
slouken@3596	588	const SDL_PixelFormat *fmt = dst->format;
slouken@3596	589	unsigned r, g, b, a, inva;
slouken@3596	590
slouken@3596	591	if (blendMode == SDL_BLENDMODE_BLEND \|\| blendMode == SDL_BLENDMODE_ADD) {
slouken@3596	592	r = DRAW_MUL(_r, _a);
slouken@3596	593	g = DRAW_MUL(_g, _a);
slouken@3596	594	b = DRAW_MUL(_b, _a);
slouken@3596	595	a = _a;
slouken@3596	596	} else {
slouken@3596	597	r = _r;
slouken@3596	598	g = _g;
slouken@3596	599	b = _b;
slouken@3596	600	a = _a;
slouken@3596	601	}
slouken@3596	602	inva = (a ^ 0xff);
slouken@3596	603
slouken@3596	604	if (y1 == y2) {
slouken@3596	605	switch (blendMode) {
slouken@3596	606	case SDL_BLENDMODE_BLEND:
slouken@3596	607	HLINE(Uint32, DRAW_SETPIXEL_BLEND_ARGB8888, draw_end);
slouken@3596	608	break;
slouken@3596	609	case SDL_BLENDMODE_ADD:
slouken@3596	610	HLINE(Uint32, DRAW_SETPIXEL_ADD_ARGB8888, draw_end);
slouken@3596	611	break;
slouken@5184	612	case SDL_BLENDMODE_MOD:
slouken@5184	613	HLINE(Uint32, DRAW_SETPIXEL_MOD_ARGB8888, draw_end);
slouken@5184	614	break;
slouken@3596	615	default:
slouken@3596	616	HLINE(Uint32, DRAW_SETPIXEL_ARGB8888, draw_end);
slouken@3596	617	break;
slouken@3596	618	}
slouken@3596	619	} else if (x1 == x2) {
slouken@3596	620	switch (blendMode) {
slouken@3596	621	case SDL_BLENDMODE_BLEND:
slouken@3596	622	VLINE(Uint32, DRAW_SETPIXEL_BLEND_ARGB8888, draw_end);
slouken@3596	623	break;
slouken@3596	624	case SDL_BLENDMODE_ADD:
slouken@3596	625	VLINE(Uint32, DRAW_SETPIXEL_ADD_ARGB8888, draw_end);
slouken@3596	626	break;
slouken@5184	627	case SDL_BLENDMODE_MOD:
slouken@5184	628	VLINE(Uint32, DRAW_SETPIXEL_MOD_ARGB8888, draw_end);
slouken@5184	629	break;
slouken@3596	630	default:
slouken@3596	631	VLINE(Uint32, DRAW_SETPIXEL_ARGB8888, draw_end);
slouken@2898	632	break;
slouken@2898	633	}
slouken@3596	634	} else if (ABS(x1 - x2) == ABS(y1 - y2)) {
slouken@3596	635	switch (blendMode) {
slouken@3596	636	case SDL_BLENDMODE_BLEND:
slouken@3596	637	DLINE(Uint32, DRAW_SETPIXEL_BLEND_ARGB8888, draw_end);
slouken@3596	638	break;
slouken@3596	639	case SDL_BLENDMODE_ADD:
slouken@3596	640	DLINE(Uint32, DRAW_SETPIXEL_ADD_ARGB8888, draw_end);
slouken@3596	641	break;
slouken@5184	642	case SDL_BLENDMODE_MOD:
slouken@5184	643	DLINE(Uint32, DRAW_SETPIXEL_MOD_ARGB8888, draw_end);
slouken@5184	644	break;
slouken@3596	645	default:
slouken@3596	646	DLINE(Uint32, DRAW_SETPIXEL_ARGB8888, draw_end);
slouken@3596	647	break;
slouken@3596	648	}
slouken@3596	649	} else {
slouken@3596	650	switch (blendMode) {
slouken@3596	651	case SDL_BLENDMODE_BLEND:
slouken@3596	652	AALINE(x1, y1, x2, y2,
slouken@3596	653	DRAW_SETPIXELXY_BLEND_ARGB8888, DRAW_SETPIXELXY_BLEND_ARGB8888,
slouken@3596	654	draw_end);
slouken@3596	655	break;
slouken@3596	656	case SDL_BLENDMODE_ADD:
slouken@3596	657	AALINE(x1, y1, x2, y2,
slouken@3596	658	DRAW_SETPIXELXY_ADD_ARGB8888, DRAW_SETPIXELXY_ADD_ARGB8888,
slouken@3596	659	draw_end);
slouken@3596	660	break;
slouken@5184	661	case SDL_BLENDMODE_MOD:
slouken@5184	662	AALINE(x1, y1, x2, y2,
slouken@5184	663	DRAW_SETPIXELXY_MOD_ARGB8888, DRAW_SETPIXELXY_MOD_ARGB8888,
slouken@5184	664	draw_end);
slouken@5184	665	break;
slouken@3596	666	default:
slouken@3596	667	AALINE(x1, y1, x2, y2,
slouken@3596	668	DRAW_SETPIXELXY_ARGB8888, DRAW_SETPIXELXY_BLEND_ARGB8888,
slouken@3596	669	draw_end);
slouken@3596	670	break;
slouken@3596	671	}
slouken@2898	672	}
slouken@2898	673	}
slouken@2888	674
slouken@3596	675	typedef void (BlendLineFunc) (SDL_Surface dst,
slouken@3596	676	int x1, int y1, int x2, int y2,
slouken@4929	677	SDL_BlendMode blendMode,
slouken@3596	678	Uint8 r, Uint8 g, Uint8 b, Uint8 a,
slouken@3596	679	SDL_bool draw_end);
slouken@3596	680
slouken@3596	681	static BlendLineFunc
slouken@3596	682	SDL_CalculateBlendLineFunc(const SDL_PixelFormat * fmt)
slouken@3596	683	{
slouken@3596	684	switch (fmt->BytesPerPixel) {
slouken@3596	685	case 2:
slouken@3596	686	if (fmt->Rmask == 0x7C00) {
slouken@3596	687	return SDL_BlendLine_RGB555;
slouken@3596	688	} else if (fmt->Rmask == 0xF800) {
slouken@3596	689	return SDL_BlendLine_RGB565;
slouken@3596	690	} else {
slouken@3596	691	return SDL_BlendLine_RGB2;
slouken@3596	692	}
slouken@3596	693	break;
slouken@3596	694	case 4:
slouken@3596	695	if (fmt->Rmask == 0x00FF0000) {
slouken@3596	696	if (fmt->Amask) {
slouken@3596	697	return SDL_BlendLine_ARGB8888;
slouken@3596	698	} else {
slouken@3596	699	return SDL_BlendLine_RGB888;
slouken@3596	700	}
slouken@3596	701	} else {
slouken@3596	702	if (fmt->Amask) {
slouken@3596	703	return SDL_BlendLine_RGBA4;
slouken@3596	704	} else {
slouken@3596	705	return SDL_BlendLine_RGB4;
slouken@3596	706	}
slouken@3596	707	}
slouken@3596	708	}
slouken@3596	709	return NULL;
slouken@3596	710	}
slouken@3596	711
slouken@2888	712	int
slouken@2888	713	SDL_BlendLine(SDL_Surface * dst, int x1, int y1, int x2, int y2,
slouken@4929	714	SDL_BlendMode blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a)
slouken@2888	715	{
slouken@3596	716	BlendLineFunc func;
slouken@3596	717
slouken@3596	718	if (!dst) {
slouken@3596	719	SDL_SetError("SDL_BlendLine(): Passed NULL destination surface");
slouken@3596	720	return -1;
slouken@3596	721	}
slouken@3596	722
slouken@3596	723	func = SDL_CalculateBlendLineFunc(dst->format);
slouken@3596	724	if (!func) {
slouken@2888	725	SDL_SetError("SDL_BlendLine(): Unsupported surface format");
slouken@3596	726	return -1;
slouken@2888	727	}
slouken@2888	728
slouken@2888	729	/* Perform clipping */
slouken@3596	730	/* FIXME: We don't actually want to clip, as it may change line slope */
slouken@2910	731	if (!SDL_IntersectRectAndLine(&dst->clip_rect, &x1, &y1, &x2, &y2)) {
slouken@3596	732	return 0;
slouken@2896	733	}
slouken@2898	734
slouken@3596	735	func(dst, x1, y1, x2, y2, blendMode, r, g, b, a, SDL_TRUE);
slouken@3596	736	return 0;
slouken@2888	737	}
slouken@2888	738
slouken@3536	739	int
slouken@3536	740	SDL_BlendLines(SDL_Surface * dst, const SDL_Point * points, int count,
slouken@4929	741	SDL_BlendMode blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a)
slouken@3536	742	{
slouken@3536	743	int i;
slouken@3536	744	int x1, y1;
slouken@3536	745	int x2, y2;
slouken@3596	746	SDL_bool draw_end;
slouken@3596	747	BlendLineFunc func;
slouken@3536	748
slouken@3536	749	if (!dst) {
slouken@3596	750	SDL_SetError("SDL_BlendLines(): Passed NULL destination surface");
slouken@3536	751	return -1;
slouken@3536	752	}
slouken@3536	753
slouken@3596	754	func = SDL_CalculateBlendLineFunc(dst->format);
slouken@3536	755	if (!func) {
slouken@3596	756	SDL_SetError("SDL_BlendLines(): Unsupported surface format");
slouken@3596	757	return -1;
slouken@3536	758	}
slouken@3536	759
slouken@3536	760	for (i = 1; i < count; ++i) {
slouken@3536	761	x1 = points[i-1].x;
slouken@3536	762	y1 = points[i-1].y;
slouken@3536	763	x2 = points[i].x;
slouken@3536	764	y2 = points[i].y;
slouken@3536	765
slouken@3536	766	/* Perform clipping */
slouken@3536	767	/* FIXME: We don't actually want to clip, as it may change line slope */
slouken@3536	768	if (!SDL_IntersectRectAndLine(&dst->clip_rect, &x1, &y1, &x2, &y2)) {
slouken@3536	769	continue;
slouken@3536	770	}
slouken@3536	771
slouken@3596	772	/* Draw the end if it was clipped */
slouken@3596	773	draw_end = (x2 != points[i].x \|\| y2 != points[i].y);
slouken@3596	774
slouken@3596	775	func(dst, x1, y1, x2, y2, blendMode, r, g, b, a, draw_end);
slouken@3594	776	}
slouken@3594	777	if (points[0].x != points[count-1].x \|\| points[0].y != points[count-1].y) {
slouken@3596	778	SDL_BlendPoint(dst, points[count-1].x, points[count-1].y,
slouken@3596	779	blendMode, r, g, b, a);
slouken@3536	780	}
slouken@3596	781	return 0;
slouken@3536	782	}
slouken@3536	783
slouken@5226	784	#endif /* !SDL_RENDER_DISABLED */
slouken@5226	785
slouken@2888	786	/* vi: set ts=4 sw=4 expandtab: */

author	Sam Lantinga
	Tue, 08 Feb 2011 10:04:09 -0800
changeset 5226	710d00cb3a6a
parent 5184	d976b67150c5
child 5262	b530ef003506
permissions	-rw-r--r--