lxdream 0.9.1| filename | src/pvr2/render.c |
| changeset | 222:541d9d899aba |
| prev | 221:cf5c6d326162 |
| next | 299:d0c983d5ad59 |
| author | nkeynes |
| date | Wed Jan 03 09:00:17 2007 +0000 (17 years ago) |
| permissions | -rw-r--r-- |
| last change | Adjust timers when they're read rather than waiting until the next time slice. Also temporarily cut the CPU time by 4. Initialize the FRQCR register to 0x0E0A for convenience |
| view | annotate | diff | log | raw |
1 /**
2 * $Id: render.c,v 1.15 2006-09-12 11:54:19 nkeynes Exp $
3 *
4 * PVR2 Renderer support. This part is primarily
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 */
19 #include "pvr2/pvr2.h"
20 #include "asic.h"
22 /**
23 * Describes a rendering buffer that's actually held in GL, for when we need
24 * to fetch the bits back to vram.
25 */
26 typedef struct pvr2_render_buffer {
27 sh4addr_t render_addr; /* The actual address rendered to in pvr ram */
28 uint32_t size; /* Length of rendering region in bytes */
29 int width, height;
30 int colour_format;
31 } *pvr2_render_buffer_t;
33 struct pvr2_render_buffer front_buffer;
34 struct pvr2_render_buffer back_buffer;
36 typedef struct pvr2_bgplane_packed {
37 uint32_t poly_cfg, poly_mode;
38 uint32_t texture_mode;
39 float x1, y1, z1;
40 uint32_t colour1;
41 float x2, y2, z2;
42 uint32_t colour2;
43 float x3, y3, z3;
44 uint32_t colour3;
45 } *pvr2_bgplane_packed_t;
49 void pvr2_render_copy_to_sh4( pvr2_render_buffer_t buffer,
50 gboolean backBuffer );
52 int pvr2_render_font_list = -1;
53 int pvr2_render_trace = 0;
55 int glPrintf( int x, int y, const char *fmt, ... )
56 {
57 va_list ap; /* our argument pointer */
58 char buf[256];
59 int len;
60 if (fmt == NULL) /* if there is no string to draw do nothing */
61 return;
62 va_start(ap, fmt);
63 len = vsnprintf(buf, sizeof(buf), fmt, ap);
64 va_end(ap);
67 glPushAttrib(GL_LIST_BIT);
68 glDisable( GL_DEPTH_TEST );
69 glDisable( GL_BLEND );
70 glDisable( GL_TEXTURE_2D );
71 glDisable( GL_ALPHA_TEST );
72 glDisable( GL_CULL_FACE );
73 glListBase(pvr2_render_font_list - 32);
74 glColor3f( 1.0, 1.0, 1.0 );
75 glRasterPos2i( x, y );
76 glCallLists(len, GL_UNSIGNED_BYTE, buf);
77 glPopAttrib();
79 return len;
80 }
82 void glDrawGrid( int width, int height )
83 {
84 int i;
85 glDisable( GL_DEPTH_TEST );
86 glLineWidth(1);
88 glBegin( GL_LINES );
89 glColor4f( 1.0, 1.0, 1.0, 1.0 );
90 for( i=32; i<width; i+=32 ) {
91 glVertex3f( i, 0.0, 3.0 );
92 glVertex3f( i,height-1, 3.0 );
93 }
95 for( i=32; i<height; i+=32 ) {
96 glVertex3f( 0.0, i, 3.0 );
97 glVertex3f( width, i, 3.0 );
98 }
99 glEnd();
101 }
104 gboolean pvr2_render_init( void )
105 {
106 front_buffer.render_addr = -1;
107 back_buffer.render_addr = -1;
108 }
110 /**
111 * Invalidate any caching on the supplied address. Specifically, if it falls
112 * within either the front buffer or back buffer, flush the buffer back to
113 * PVR2 ram (note that front buffer flush may be corrupt under some
114 * circumstances).
115 */
116 gboolean pvr2_render_invalidate( sh4addr_t address )
117 {
118 address = address & 0x1FFFFFFF;
119 if( front_buffer.render_addr != -1 &&
120 front_buffer.render_addr <= address &&
121 (front_buffer.render_addr + front_buffer.size) > address ) {
122 pvr2_render_copy_to_sh4( &front_buffer, FALSE );
123 front_buffer.render_addr = -1;
124 return TRUE;
125 } else if( back_buffer.render_addr != -1 &&
126 back_buffer.render_addr <= address &&
127 (back_buffer.render_addr + back_buffer.size) > address ) {
128 pvr2_render_copy_to_sh4( &back_buffer, TRUE );
129 back_buffer.render_addr = -1;
130 return TRUE;
131 }
132 return FALSE;
133 }
135 /**
136 * Display a rendered frame if one is available.
137 * @param address An address in PVR ram (0500000 range).
138 * @return TRUE if a frame was available to be displayed, otherwise false.
139 */
140 gboolean pvr2_render_display_frame( uint32_t address )
141 {
142 if( front_buffer.render_addr == address ) {
143 /* Current front buffer is already displayed, so do nothing
144 * and tell the caller that all is well.
145 */
146 return TRUE;
147 }
148 if( back_buffer.render_addr == address ) {
149 /* The more useful case - back buffer is to be displayed. Swap
150 * the buffers
151 */
152 display_driver->display_back_buffer();
153 front_buffer = back_buffer;
154 back_buffer.render_addr = -1;
155 return TRUE;
156 }
157 return FALSE;
158 }
160 /**
161 * Prepare the OpenGL context to receive instructions for a new frame.
162 */
163 static void pvr2_render_prepare_context( sh4addr_t render_addr,
164 uint32_t width, uint32_t height,
165 uint32_t colour_format,
166 float bgplanez,
167 gboolean texture_target )
168 {
169 /* Select and initialize the render context */
170 display_driver->set_render_format( width, height, colour_format, texture_target );
172 if( pvr2_render_font_list == -1 ) {
173 pvr2_render_font_list = video_glx_load_font( "-*-helvetica-*-r-normal--16-*-*-*-p-*-iso8859-1");
174 }
176 if( back_buffer.render_addr != -1 &&
177 back_buffer.render_addr != render_addr ) {
178 /* There's a current back buffer, and we're rendering somewhere else -
179 * flush the back buffer back to vram and start a new back buffer
180 */
181 pvr2_render_copy_to_sh4( &back_buffer, TRUE );
182 }
184 if( front_buffer.render_addr == render_addr ) {
185 /* In case we've been asked to render to the current front buffer -
186 * invalidate the front buffer and render to the back buffer, ensuring
187 * we swap at the next frame display.
188 */
189 front_buffer.render_addr = -1;
190 }
191 back_buffer.render_addr = render_addr;
192 back_buffer.width = width;
193 back_buffer.height = height;
194 back_buffer.colour_format = colour_format;
195 back_buffer.size = width * height * colour_format_bytes[colour_format];
197 /* Setup the display model */
198 glDrawBuffer(GL_BACK);
199 glShadeModel(GL_SMOOTH);
200 glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);
201 glViewport( 0, 0, width, height );
202 glMatrixMode(GL_PROJECTION);
203 glLoadIdentity();
204 glOrtho( 0, width, height, 0, bgplanez, -4 );
205 glMatrixMode(GL_MODELVIEW);
206 glLoadIdentity();
207 glCullFace( GL_BACK );
209 /* Clear out the buffers */
210 glDisable( GL_SCISSOR_TEST );
211 glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
212 glClearDepth(bgplanez);
213 glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
214 }
216 /**
217 * Render a complete scene into the OpenGL back buffer.
218 * Note: this will probably need to be broken up eventually once timings are
219 * determined.
220 */
221 void pvr2_render_scene( )
222 {
223 struct tile_descriptor *tile_desc =
224 (struct tile_descriptor *)mem_get_region(PVR2_RAM_BASE + MMIO_READ( PVR2, RENDER_TILEBASE ));
226 uint32_t render_addr = MMIO_READ( PVR2, RENDER_ADDR1 );
227 gboolean render_to_tex;
228 if( render_addr & 0x01000000 ) {
229 render_addr = (render_addr & 0x00FFFFFF) + PVR2_RAM_BASE_INT;
230 /* Heuristic - if we're rendering to the interlaced region we're
231 * probably creating a texture rather than rendering actual output.
232 * We can optimise for this case a little
233 */
234 render_to_tex = TRUE;
235 WARN( "Render to texture not supported properly yet" );
236 } else {
237 render_addr = (render_addr & 0x00FFFFFF) + PVR2_RAM_BASE;
238 render_to_tex = FALSE;
239 }
241 float bgplanez = MMIO_READF( PVR2, RENDER_FARCLIP );
242 uint32_t render_mode = MMIO_READ( PVR2, RENDER_MODE );
243 int width = 640; /* FIXME - get this from the tile buffer */
244 int height = 480;
245 int colour_format = pvr2_render_colour_format[render_mode&0x07];
246 pvr2_render_prepare_context( render_addr, width, height, colour_format,
247 bgplanez, render_to_tex );
249 int clip_x = MMIO_READ( PVR2, RENDER_HCLIP ) & 0x03FF;
250 int clip_y = MMIO_READ( PVR2, RENDER_VCLIP ) & 0x03FF;
251 int clip_width = ((MMIO_READ( PVR2, RENDER_HCLIP ) >> 16) & 0x03FF) - clip_x + 1;
252 int clip_height= ((MMIO_READ( PVR2, RENDER_VCLIP ) >> 16) & 0x03FF) - clip_y + 1;
254 /* Fog setup goes here */
256 /* Render the background plane */
257 uint32_t bgplane_mode = MMIO_READ(PVR2, RENDER_BGPLANE);
258 uint32_t *display_list =
259 (uint32_t *)mem_get_region(PVR2_RAM_BASE + MMIO_READ( PVR2, RENDER_POLYBASE ));
261 uint32_t *bgplane = display_list + (((bgplane_mode & 0x00FFFFFF)) >> 3) ;
262 render_backplane( bgplane, width, height, bgplane_mode );
264 pvr2_render_tilebuffer( width, height, clip_x, clip_y,
265 clip_x + clip_width, clip_y + clip_height );
267 /* Post-render cleanup and update */
269 /* Add frame, fps, etc data */
270 //glDrawGrid( width, height );
271 glPrintf( 4, 16, "Frame %d", pvr2_get_frame_count() );
272 /* Generate end of render event */
273 asic_event( EVENT_PVR_RENDER_DONE );
274 DEBUG( "Rendered frame %d", pvr2_get_frame_count() );
275 }
278 /**
279 * Flush the indicated render buffer back to PVR. Caller is responsible for
280 * tracking whether there is actually anything in the buffer.
281 *
282 * @param buffer A render buffer indicating the address to store to, and the
283 * format the data needs to be in.
284 * @param backBuffer TRUE to flush the back buffer, FALSE for
285 * the front buffer.
286 */
287 void pvr2_render_copy_to_sh4( pvr2_render_buffer_t buffer,
288 gboolean backBuffer )
289 {
290 if( buffer->render_addr == -1 )
291 return;
292 GLenum type, format = GL_RGBA;
293 int line_size = buffer->width, size;
295 switch( buffer->colour_format ) {
296 case COLFMT_RGB565:
297 type = GL_UNSIGNED_SHORT_5_6_5;
298 format = GL_RGB;
299 line_size <<= 1;
300 break;
301 case COLFMT_RGB888:
302 type = GL_UNSIGNED_INT;
303 format = GL_RGB;
304 line_size = (line_size<<1)+line_size;
305 break;
306 case COLFMT_ARGB1555:
307 type = GL_UNSIGNED_SHORT_5_5_5_1;
308 line_size <<= 1;
309 break;
310 case COLFMT_ARGB4444:
311 type = GL_UNSIGNED_SHORT_4_4_4_4;
312 line_size <<= 1;
313 break;
314 case COLFMT_ARGB8888:
315 type = GL_UNSIGNED_INT_8_8_8_8;
316 line_size <<= 2;
317 break;
318 }
319 size = line_size * buffer->height;
321 if( backBuffer ) {
322 glFinish();
323 glReadBuffer( GL_BACK );
324 } else {
325 glReadBuffer( GL_FRONT );
326 }
328 if( buffer->render_addr & 0xFF000000 == 0x04000000 ) {
329 /* Interlaced buffer. Go the double copy... :( */
330 char target[size];
331 glReadPixels( 0, 0, buffer->width, buffer->height, format, type, target );
332 pvr2_vram64_write( buffer->render_addr, target, size );
333 } else {
334 /* Regular buffer */
335 char target[size];
336 glReadPixels( 0, 0, buffer->width, buffer->height, format, type, target );
337 pvr2_vram_write_invert( buffer->render_addr, target, size, line_size );
338 }
339 }
342 /**
343 * Copy data from PVR ram into the GL render buffer.
344 *
345 * @param buffer A render buffer indicating the address to read from, and the
346 * format the data is in.
347 * @param backBuffer TRUE to write the back buffer, FALSE for
348 * the front buffer.
349 */
350 void pvr2_render_copy_from_sh4( pvr2_render_buffer_t buffer,
351 gboolean backBuffer )
352 {
353 if( buffer->render_addr == -1 )
354 return;
355 GLenum type, format = GL_RGBA;
356 int size = buffer->width * buffer->height;
358 switch( buffer->colour_format ) {
359 case COLFMT_RGB565:
360 type = GL_UNSIGNED_SHORT_5_6_5;
361 format = GL_RGB;
362 size <<= 1;
363 break;
364 case COLFMT_RGB888:
365 type = GL_UNSIGNED_INT;
366 format = GL_RGB;
367 size = (size<<1)+size;
368 break;
369 case COLFMT_ARGB1555:
370 type = GL_UNSIGNED_SHORT_5_5_5_1;
371 size <<= 1;
372 break;
373 case COLFMT_ARGB4444:
374 type = GL_UNSIGNED_SHORT_4_4_4_4;
375 size <<= 1;
376 break;
377 case COLFMT_ARGB8888:
378 type = GL_UNSIGNED_INT_8_8_8_8;
379 size <<= 2;
380 break;
381 }
383 if( backBuffer ) {
384 glDrawBuffer( GL_BACK );
385 } else {
386 glDrawBuffer( GL_FRONT );
387 }
389 glRasterPos2i( 0, 0 );
390 if( buffer->render_addr & 0xFF000000 == 0x04000000 ) {
391 /* Interlaced buffer. Go the double copy... :( */
392 char target[size];
393 pvr2_vram64_read( target, buffer->render_addr, size );
394 glDrawPixels( buffer->width, buffer->height,
395 format, type, target );
396 } else {
397 /* Regular buffer - go direct */
398 char *target = mem_get_region( buffer->render_addr );
399 glDrawPixels( buffer->width, buffer->height,
400 format, type, target );
401 }
402 }
.