filename | src/pvr2/rendcore.c |
changeset | 223:f6c28fa9076b |
prev | 222:541d9d899aba |
next | 268:1ba7e5a7a3f7 |
author | nkeynes |
date | Wed Jan 03 09:01:51 2007 +0000 (17 years ago) |
permissions | -rw-r--r-- |
last change | Implement the main CRTC registers, along with the sync status register. Timings are now pretty close to the real thing. |
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1 /**
2 * $Id: rendcore.c,v 1.6 2006-09-12 12:16:36 nkeynes Exp $
3 *
4 * PVR2 renderer core.
5 *
6 * Copyright (c) 2005 Nathan Keynes.
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 */
18 #include <sys/time.h>
19 #include "pvr2/pvr2.h"
20 #include "asic.h"
22 int pvr2_poly_depthmode[8] = { GL_NEVER, GL_LESS, GL_EQUAL, GL_LEQUAL,
23 GL_GREATER, GL_NOTEQUAL, GL_GEQUAL,
24 GL_ALWAYS };
25 int pvr2_poly_srcblend[8] = {
26 GL_ZERO, GL_ONE, GL_DST_COLOR, GL_ONE_MINUS_DST_COLOR,
27 GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA, GL_DST_ALPHA,
28 GL_ONE_MINUS_DST_ALPHA };
29 int pvr2_poly_dstblend[8] = {
30 GL_ZERO, GL_ONE, GL_SRC_COLOR, GL_ONE_MINUS_SRC_COLOR,
31 GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA, GL_DST_ALPHA,
32 GL_ONE_MINUS_DST_ALPHA };
33 int pvr2_poly_texblend[4] = {
34 GL_REPLACE, GL_BLEND, GL_DECAL, GL_MODULATE };
35 int pvr2_render_colour_format[8] = {
36 COLFMT_ARGB1555, COLFMT_RGB565, COLFMT_ARGB4444, COLFMT_ARGB1555,
37 COLFMT_RGB888, COLFMT_ARGB8888, COLFMT_ARGB8888, COLFMT_ARGB4444 };
40 #define CULL_NONE 0
41 #define CULL_SMALL 1
42 #define CULL_CCW 2
43 #define CULL_CW 3
45 #define SEGMENT_END 0x80000000
46 #define SEGMENT_SORT_TRANS 0x20000000
47 #define SEGMENT_START 0x10000000
48 #define SEGMENT_X(c) (((c) >> 2) & 0x3F)
49 #define SEGMENT_Y(c) (((c) >> 8) & 0x3F)
50 #define NO_POINTER 0x80000000
52 extern char *video_base;
54 struct tile_segment {
55 uint32_t control;
56 pvraddr_t opaque_ptr;
57 pvraddr_t opaquemod_ptr;
58 pvraddr_t trans_ptr;
59 pvraddr_t transmod_ptr;
60 pvraddr_t punchout_ptr;
61 };
63 /**
64 * Convert a half-float (16-bit) FP number to a regular 32-bit float.
65 * Source is 1-bit sign, 5-bit exponent, 10-bit mantissa.
66 * TODO: Check the correctness of this.
67 */
68 float halftofloat( uint16_t half )
69 {
70 union {
71 float f;
72 uint32_t i;
73 } temp;
74 int e = ((half & 0x7C00) >> 10) - 15 + 127;
76 temp.i = ((half & 0x8000) << 16) | (e << 23) |
77 ((half & 0x03FF) << 13);
78 return temp.f;
79 }
82 /**
83 * Setup the GL context for the supplied polygon context.
84 * @param context pointer to 3 or 5 words of polygon context
85 * @param modified boolean flag indicating that the modified
86 * version should be used, rather than the normal version.
87 */
88 void render_set_context( uint32_t *context, int render_mode )
89 {
90 uint32_t poly1 = context[0], poly2, texture;
91 if( render_mode == RENDER_FULLMOD ) {
92 poly2 = context[3];
93 texture = context[4];
94 } else {
95 poly2 = context[1];
96 texture = context[2];
97 }
99 if( POLY1_DEPTH_ENABLE(poly1) ) {
100 glEnable( GL_DEPTH_TEST );
101 glDepthFunc( POLY1_DEPTH_MODE(poly1) );
102 } else {
103 glDisable( GL_DEPTH_TEST );
104 }
106 switch( POLY1_CULL_MODE(poly1) ) {
107 case CULL_NONE:
108 case CULL_SMALL:
109 glDisable( GL_CULL_FACE );
110 break;
111 case CULL_CCW:
112 glEnable( GL_CULL_FACE );
113 glFrontFace( GL_CW );
114 break;
115 case CULL_CW:
116 glEnable( GL_CULL_FACE );
117 glFrontFace( GL_CCW );
118 break;
119 }
121 if( POLY1_TEXTURED(poly1) ) {
122 int width = POLY2_TEX_WIDTH(poly2);
123 int height = POLY2_TEX_HEIGHT(poly2);
124 glEnable(GL_TEXTURE_2D);
125 texcache_get_texture( (texture&0x001FFFFF)<<3, width, height, texture );
126 glTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, POLY2_TEX_BLEND(poly2) );
127 } else {
128 glDisable( GL_TEXTURE_2D );
129 }
131 glShadeModel( POLY1_SHADE_MODEL(poly1) );
133 int srcblend = POLY2_SRC_BLEND(poly2);
134 int destblend = POLY2_DEST_BLEND(poly2);
135 glBlendFunc( srcblend, destblend );
136 if( POLY2_TEX_ALPHA_ENABLE(poly2) ) {
137 glEnable(GL_BLEND);
138 } else {
139 glDisable(GL_BLEND);
140 }
141 }
143 void render_vertexes( uint32_t poly1, uint32_t *vertexes, int num_vertexes, int vertex_size,
144 int render_mode )
145 {
146 int i, m=0;
148 if( render_mode == RENDER_FULLMOD ) {
149 m = (vertex_size - 3)/2;
150 }
152 glBegin( GL_TRIANGLE_STRIP );
154 for( i=0; i<num_vertexes; i++ ) {
155 float *vertexf = (float *)vertexes;
156 uint32_t argb;
157 if( POLY1_TEXTURED(poly1) ) {
158 if( POLY1_UV16(poly1) ) {
159 glTexCoord2f( halftofloat(vertexes[m+3]>>16),
160 halftofloat(vertexes[m+3]) );
161 argb = vertexes[m+4];
162 } else {
163 glTexCoord2f( vertexf[m+3], vertexf[m+4] );
164 argb = vertexes[m+5];
165 }
166 } else {
167 argb = vertexes[m+3];
168 }
170 glColor4ub( (GLubyte)(argb >> 16), (GLubyte)(argb >> 8),
171 (GLubyte)argb, (GLubyte)(argb >> 24) );
172 glVertex3f( vertexf[0], vertexf[1], vertexf[2] );
173 vertexes += vertex_size;
174 }
176 glEnd();
177 }
179 /**
180 * Render a simple (not auto-sorted) tile
181 */
182 void render_tile( pvraddr_t tile_entry, int render_mode, gboolean cheap_modifier_mode ) {
183 uint32_t poly_bank = MMIO_READ(PVR2,RENDER_POLYBASE);
184 uint32_t *tile_list = (uint32_t *)(video_base+tile_entry);
185 do {
186 uint32_t entry = *tile_list++;
187 if( entry >> 28 == 0x0F ) {
188 break;
189 } else if( entry >> 28 == 0x0E ) {
190 tile_list = (uint32_t *)(video_base + (entry&0x007FFFFF));
191 } else {
192 uint32_t *polygon = (uint32_t *)(video_base + poly_bank + ((entry & 0x000FFFFF) << 2));
193 int is_modified = entry & 0x01000000;
194 int vertex_length = (entry >> 21) & 0x07;
195 int context_length = 3;
196 if( is_modified && !cheap_modifier_mode ) {
197 context_length = 5;
198 vertex_length *= 2 ;
199 }
200 vertex_length += 3;
202 if( (entry & 0xE0000000) == 0x80000000 ) {
203 /* Triangle(s) */
204 int strip_count = ((entry >> 25) & 0x0F)+1;
205 int polygon_length = 3 * vertex_length + context_length;
206 int i;
207 for( i=0; i<strip_count; i++ ) {
208 render_set_context( polygon, render_mode );
209 render_vertexes( *polygon, polygon+context_length, 3, vertex_length,
210 render_mode );
211 polygon += polygon_length;
212 }
213 } else if( (entry & 0xE0000000) == 0xA0000000 ) {
214 /* Sprite(s) */
215 int strip_count = (entry >> 25) & 0x0F;
216 int polygon_length = 4 * vertex_length + context_length;
217 int i;
218 for( i=0; i<strip_count; i++ ) {
219 render_set_context( polygon, render_mode );
220 render_vertexes( *polygon, polygon+context_length, 4, vertex_length,
221 render_mode );
222 polygon += polygon_length;
223 }
224 } else {
225 /* Polygon */
226 int i, first=-1, last = -1;
227 for( i=0; i<6; i++ ) {
228 if( entry & (0x40000000>>i) ) {
229 if( first == -1 ) first = i;
230 last = i;
231 }
232 }
233 if( first != -1 ) {
234 first = 0;
235 render_set_context(polygon, render_mode);
236 render_vertexes( *polygon, polygon+context_length + (first*vertex_length),
237 (last-first+3), vertex_length, render_mode );
238 }
239 }
240 }
241 } while( 1 );
242 }
244 void pvr2_render_tilebuffer( int width, int height, int clipx1, int clipy1,
245 int clipx2, int clipy2 ) {
247 pvraddr_t segmentbase = MMIO_READ( PVR2, RENDER_TILEBASE );
248 int tile_sort;
249 gboolean cheap_shadow;
251 int obj_config = MMIO_READ( PVR2, RENDER_OBJCFG );
252 int isp_config = MMIO_READ( PVR2, RENDER_ISPCFG );
253 int shadow_cfg = MMIO_READ( PVR2, RENDER_SHADOW );
255 if( (obj_config & 0x00200000) == 0 ) {
256 if( isp_config & 1 ) {
257 tile_sort = 0;
258 } else {
259 tile_sort = 2;
260 }
261 } else {
262 tile_sort = 1;
263 }
265 cheap_shadow = shadow_cfg & 0x100 ? TRUE : FALSE;
267 struct tile_segment *segment = (struct tile_segment *)(video_base + segmentbase);
269 struct timeval tv_start, tv_end;
270 gettimeofday(&tv_start, NULL);
271 glEnable( GL_SCISSOR_TEST );
272 while( (segment->control & SEGMENT_END) == 0 ) {
273 // fwrite_dump32v( (uint32_t *)segment, sizeof(struct tile_segment), 6, stderr );
274 int tilex = SEGMENT_X(segment->control);
275 int tiley = SEGMENT_Y(segment->control);
277 int x1 = tilex << 5;
278 int y1 = tiley << 5;
279 if( x1 + 32 <= clipx1 ||
280 y1 + 32 <= clipy1 ||
281 x1 >= clipx2 ||
282 y1 >= clipy2 ) {
283 /* Tile completely clipped, skip */
284 segment++;
285 continue;
286 }
288 /* Set a scissor on the visible part of the tile */
289 int w = MIN(x1+32, clipx2) - x1;
290 int h = MIN(y1+32, clipy2) - y1;
291 x1 = MAX(x1,clipx1);
292 y1 = MAX(y1,clipy1);
293 glScissor( x1, height-y1-h, w, h );
295 if( (segment->opaque_ptr & NO_POINTER) == 0 ) {
296 if( (segment->opaquemod_ptr & NO_POINTER) == 0 ) {
297 /* TODO */
298 }
299 render_tile( segment->opaque_ptr, RENDER_NORMAL, cheap_shadow );
300 }
302 if( (segment->trans_ptr & NO_POINTER) == 0 ) {
303 if( (segment->transmod_ptr & NO_POINTER) == 0 ) {
304 /* TODO */
305 }
306 if( tile_sort == 2 ||
307 (tile_sort == 1 && ((segment->control & SEGMENT_SORT_TRANS)==0)) ) {
308 render_autosort_tile( segment->trans_ptr, RENDER_NORMAL, cheap_shadow );
309 } else {
310 render_tile( segment->trans_ptr, RENDER_NORMAL, cheap_shadow );
311 }
312 }
314 if( (segment->punchout_ptr & NO_POINTER) == 0 ) {
315 render_tile( segment->punchout_ptr, RENDER_NORMAL, cheap_shadow );
316 }
317 segment++;
319 }
320 glDisable( GL_SCISSOR_TEST );
322 gettimeofday(&tv_end, NULL);
323 timersub(&tv_end,&tv_start, &tv_start);
324 }
.