Search
lxdream.org :: lxdream/src/pvr2/rendcore.c
lxdream 0.9.1
released Jun 29
Download Now
filename src/pvr2/rendcore.c
changeset 318:363935d31859
prev308:10a5b5475fb0
next319:5392aed6a982
author nkeynes
date Tue Jan 23 12:03:57 2007 +0000 (14 years ago)
permissions -rw-r--r--
last change Add initial offset color support
Honor the "enable fragment alpha" bit
file annotate diff log raw
nkeynes@189
     1
/**
nkeynes@318
     2
 * $Id: rendcore.c,v 1.11 2007-01-23 12:03:57 nkeynes Exp $
nkeynes@189
     3
 *
nkeynes@189
     4
 * PVR2 renderer core.
nkeynes@189
     5
 *
nkeynes@189
     6
 * Copyright (c) 2005 Nathan Keynes.
nkeynes@189
     7
 *
nkeynes@189
     8
 * This program is free software; you can redistribute it and/or modify
nkeynes@189
     9
 * it under the terms of the GNU General Public License as published by
nkeynes@189
    10
 * the Free Software Foundation; either version 2 of the License, or
nkeynes@189
    11
 * (at your option) any later version.
nkeynes@189
    12
 *
nkeynes@189
    13
 * This program is distributed in the hope that it will be useful,
nkeynes@189
    14
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
nkeynes@189
    15
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
nkeynes@189
    16
 * GNU General Public License for more details.
nkeynes@189
    17
 */
nkeynes@215
    18
#include <sys/time.h>
nkeynes@189
    19
#include "pvr2/pvr2.h"
nkeynes@189
    20
#include "asic.h"
nkeynes@189
    21
nkeynes@221
    22
int pvr2_poly_depthmode[8] = { GL_NEVER, GL_LESS, GL_EQUAL, GL_LEQUAL,
nkeynes@189
    23
				      GL_GREATER, GL_NOTEQUAL, GL_GEQUAL, 
nkeynes@189
    24
				      GL_ALWAYS };
nkeynes@221
    25
int pvr2_poly_srcblend[8] = { 
nkeynes@189
    26
    GL_ZERO, GL_ONE, GL_DST_COLOR, GL_ONE_MINUS_DST_COLOR,
nkeynes@189
    27
    GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA, GL_DST_ALPHA, 
nkeynes@189
    28
    GL_ONE_MINUS_DST_ALPHA };
nkeynes@221
    29
int pvr2_poly_dstblend[8] = {
nkeynes@189
    30
    GL_ZERO, GL_ONE, GL_SRC_COLOR, GL_ONE_MINUS_SRC_COLOR,
nkeynes@189
    31
    GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA, GL_DST_ALPHA,
nkeynes@189
    32
    GL_ONE_MINUS_DST_ALPHA };
nkeynes@221
    33
int pvr2_poly_texblend[4] = {
nkeynes@298
    34
    GL_REPLACE, GL_MODULATE, GL_DECAL, GL_MODULATE };
nkeynes@221
    35
int pvr2_render_colour_format[8] = {
nkeynes@189
    36
    COLFMT_ARGB1555, COLFMT_RGB565, COLFMT_ARGB4444, COLFMT_ARGB1555,
nkeynes@189
    37
    COLFMT_RGB888, COLFMT_ARGB8888, COLFMT_ARGB8888, COLFMT_ARGB4444 };
nkeynes@189
    38
nkeynes@189
    39
nkeynes@189
    40
#define CULL_NONE 0
nkeynes@189
    41
#define CULL_SMALL 1
nkeynes@189
    42
#define CULL_CCW 2
nkeynes@189
    43
#define CULL_CW 3
nkeynes@189
    44
nkeynes@189
    45
#define SEGMENT_END         0x80000000
nkeynes@298
    46
#define SEGMENT_ZCLEAR      0x40000000
nkeynes@189
    47
#define SEGMENT_SORT_TRANS  0x20000000
nkeynes@189
    48
#define SEGMENT_START       0x10000000
nkeynes@189
    49
#define SEGMENT_X(c)        (((c) >> 2) & 0x3F)
nkeynes@189
    50
#define SEGMENT_Y(c)        (((c) >> 8) & 0x3F)
nkeynes@189
    51
#define NO_POINTER          0x80000000
nkeynes@189
    52
nkeynes@189
    53
extern char *video_base;
nkeynes@189
    54
nkeynes@318
    55
gboolean pvr2_force_fragment_alpha;
nkeynes@318
    56
nkeynes@189
    57
struct tile_segment {
nkeynes@189
    58
    uint32_t control;
nkeynes@189
    59
    pvraddr_t opaque_ptr;
nkeynes@189
    60
    pvraddr_t opaquemod_ptr;
nkeynes@189
    61
    pvraddr_t trans_ptr;
nkeynes@189
    62
    pvraddr_t transmod_ptr;
nkeynes@189
    63
    pvraddr_t punchout_ptr;
nkeynes@189
    64
};
nkeynes@189
    65
nkeynes@189
    66
/**
nkeynes@189
    67
 * Convert a half-float (16-bit) FP number to a regular 32-bit float.
nkeynes@189
    68
 * Source is 1-bit sign, 5-bit exponent, 10-bit mantissa.
nkeynes@189
    69
 * TODO: Check the correctness of this.
nkeynes@189
    70
 */
nkeynes@189
    71
float halftofloat( uint16_t half )
nkeynes@189
    72
{
nkeynes@189
    73
    union {
nkeynes@189
    74
        float f;
nkeynes@189
    75
        uint32_t i;
nkeynes@189
    76
    } temp;
nkeynes@308
    77
    /* int e = ((half & 0x7C00) >> 10) - 15 + 127;
nkeynes@189
    78
nkeynes@189
    79
    temp.i = ((half & 0x8000) << 16) | (e << 23) |
nkeynes@308
    80
    ((half & 0x03FF) << 13); */
nkeynes@308
    81
    temp.i = ((uint32_t)half)<<16;
nkeynes@189
    82
    return temp.f;
nkeynes@189
    83
}
nkeynes@189
    84
nkeynes@189
    85
nkeynes@189
    86
/**
nkeynes@189
    87
 * Setup the GL context for the supplied polygon context.
nkeynes@189
    88
 * @param context pointer to 3 or 5 words of polygon context
nkeynes@189
    89
 * @param modified boolean flag indicating that the modified
nkeynes@189
    90
 *  version should be used, rather than the normal version.
nkeynes@189
    91
 */
nkeynes@189
    92
void render_set_context( uint32_t *context, int render_mode )
nkeynes@189
    93
{
nkeynes@189
    94
    uint32_t poly1 = context[0], poly2, texture;
nkeynes@189
    95
    if( render_mode == RENDER_FULLMOD ) {
nkeynes@189
    96
	poly2 = context[3];
nkeynes@189
    97
	texture = context[4];
nkeynes@189
    98
    } else {
nkeynes@189
    99
	poly2 = context[1];
nkeynes@189
   100
	texture = context[2];
nkeynes@189
   101
    }
nkeynes@189
   102
nkeynes@189
   103
    if( POLY1_DEPTH_ENABLE(poly1) ) {
nkeynes@189
   104
	glEnable( GL_DEPTH_TEST );
nkeynes@189
   105
	glDepthFunc( POLY1_DEPTH_MODE(poly1) );
nkeynes@189
   106
    } else {
nkeynes@189
   107
	glDisable( GL_DEPTH_TEST );
nkeynes@189
   108
    }
nkeynes@189
   109
    
nkeynes@189
   110
    switch( POLY1_CULL_MODE(poly1) ) {
nkeynes@189
   111
    case CULL_NONE:
nkeynes@189
   112
    case CULL_SMALL:
nkeynes@189
   113
	glDisable( GL_CULL_FACE );
nkeynes@189
   114
	break;
nkeynes@189
   115
    case CULL_CCW:
nkeynes@189
   116
	glEnable( GL_CULL_FACE );
nkeynes@189
   117
	glFrontFace( GL_CW );
nkeynes@189
   118
	break;
nkeynes@189
   119
    case CULL_CW:
nkeynes@189
   120
	glEnable( GL_CULL_FACE );
nkeynes@189
   121
	glFrontFace( GL_CCW );
nkeynes@189
   122
	break;
nkeynes@189
   123
    }
nkeynes@189
   124
nkeynes@318
   125
    if( POLY1_SPECULAR(poly1) ) {
nkeynes@318
   126
	glEnable(GL_COLOR_SUM);
nkeynes@318
   127
    } else {
nkeynes@318
   128
	glDisable(GL_COLOR_SUM);
nkeynes@318
   129
    }
nkeynes@318
   130
nkeynes@189
   131
    if( POLY1_TEXTURED(poly1) ) {
nkeynes@189
   132
	int width = POLY2_TEX_WIDTH(poly2);
nkeynes@189
   133
	int height = POLY2_TEX_HEIGHT(poly2);
nkeynes@189
   134
	glEnable(GL_TEXTURE_2D);
nkeynes@286
   135
	texcache_get_texture( (texture&0x000FFFFF)<<3, width, height, texture );
nkeynes@189
   136
	glTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, POLY2_TEX_BLEND(poly2) );
nkeynes@308
   137
	if( POLY2_TEX_CLAMP_U(poly2) ) {
nkeynes@308
   138
	    glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP );
nkeynes@308
   139
	} else {
nkeynes@308
   140
	    glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT );
nkeynes@308
   141
	}	    
nkeynes@308
   142
	if( POLY2_TEX_CLAMP_V(poly2) ) {
nkeynes@308
   143
	    glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP );
nkeynes@308
   144
	} else {
nkeynes@308
   145
	    glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT );
nkeynes@308
   146
	}
nkeynes@189
   147
    } else {
nkeynes@189
   148
	glDisable( GL_TEXTURE_2D );
nkeynes@189
   149
    }
nkeynes@189
   150
nkeynes@189
   151
    glShadeModel( POLY1_SHADE_MODEL(poly1) );
nkeynes@189
   152
nkeynes@221
   153
    int srcblend = POLY2_SRC_BLEND(poly2);
nkeynes@221
   154
    int destblend = POLY2_DEST_BLEND(poly2);
nkeynes@221
   155
    glBlendFunc( srcblend, destblend );
nkeynes@318
   156
nkeynes@318
   157
    pvr2_force_fragment_alpha = POLY2_ALPHA_ENABLE(poly2) ? FALSE : TRUE;
nkeynes@318
   158
nkeynes@189
   159
}
nkeynes@189
   160
nkeynes@189
   161
void render_vertexes( uint32_t poly1, uint32_t *vertexes, int num_vertexes, int vertex_size,
nkeynes@189
   162
		      int render_mode ) 
nkeynes@189
   163
{
nkeynes@189
   164
    int i, m=0;
nkeynes@189
   165
nkeynes@189
   166
    if( render_mode == RENDER_FULLMOD ) {
nkeynes@189
   167
	m = (vertex_size - 3)/2;
nkeynes@189
   168
    }
nkeynes@189
   169
nkeynes@189
   170
    glBegin( GL_TRIANGLE_STRIP );
nkeynes@189
   171
    
nkeynes@189
   172
    for( i=0; i<num_vertexes; i++ ) {
nkeynes@189
   173
	float *vertexf = (float *)vertexes;
nkeynes@189
   174
	uint32_t argb;
nkeynes@318
   175
	int k = m + 3;
nkeynes@189
   176
	if( POLY1_TEXTURED(poly1) ) {
nkeynes@189
   177
	    if( POLY1_UV16(poly1) ) {
nkeynes@318
   178
		glTexCoord2f( halftofloat(vertexes[k]>>16),
nkeynes@318
   179
			      halftofloat(vertexes[k]) );
nkeynes@318
   180
		k++;
nkeynes@189
   181
	    } else {
nkeynes@318
   182
		glTexCoord2f( vertexf[k], vertexf[k+1] );
nkeynes@318
   183
		k+=2;
nkeynes@189
   184
	    }
nkeynes@189
   185
	}
nkeynes@189
   186
nkeynes@318
   187
	argb = vertexes[k++];
nkeynes@318
   188
	if( pvr2_force_fragment_alpha ) {
nkeynes@318
   189
	    glColor4ub( (GLubyte)(argb >> 16), (GLubyte)(argb >> 8), 
nkeynes@318
   190
			(GLubyte)argb, 0xFF );
nkeynes@318
   191
	} else {
nkeynes@318
   192
	    glColor4ub( (GLubyte)(argb >> 16), (GLubyte)(argb >> 8), 
nkeynes@318
   193
			(GLubyte)argb, (GLubyte)(argb >> 24) );
nkeynes@318
   194
	}
nkeynes@318
   195
nkeynes@318
   196
	if( POLY1_SPECULAR(poly1) ) {
nkeynes@318
   197
	    uint32_t spec = vertexes[k++];
nkeynes@318
   198
	    glSecondaryColor3ubEXT( (GLubyte)(spec >> 16), (GLubyte)(spec >> 8), 
nkeynes@318
   199
				 (GLubyte)spec );
nkeynes@318
   200
	}
nkeynes@189
   201
	glVertex3f( vertexf[0], vertexf[1], vertexf[2] );
nkeynes@189
   202
	vertexes += vertex_size;
nkeynes@189
   203
    }
nkeynes@189
   204
nkeynes@189
   205
    glEnd();
nkeynes@189
   206
}
nkeynes@189
   207
nkeynes@189
   208
/**
nkeynes@189
   209
 * Render a simple (not auto-sorted) tile
nkeynes@189
   210
 */
nkeynes@189
   211
void render_tile( pvraddr_t tile_entry, int render_mode, gboolean cheap_modifier_mode ) {
nkeynes@215
   212
    uint32_t poly_bank = MMIO_READ(PVR2,RENDER_POLYBASE);
nkeynes@189
   213
    uint32_t *tile_list = (uint32_t *)(video_base+tile_entry);
nkeynes@189
   214
    do {
nkeynes@189
   215
	uint32_t entry = *tile_list++;
nkeynes@189
   216
	if( entry >> 28 == 0x0F ) {
nkeynes@189
   217
	    break;
nkeynes@189
   218
	} else if( entry >> 28 == 0x0E ) {
nkeynes@189
   219
	    tile_list = (uint32_t *)(video_base + (entry&0x007FFFFF));
nkeynes@189
   220
	} else {
nkeynes@215
   221
	    uint32_t *polygon = (uint32_t *)(video_base + poly_bank + ((entry & 0x000FFFFF) << 2));
nkeynes@189
   222
	    int is_modified = entry & 0x01000000;
nkeynes@189
   223
	    int vertex_length = (entry >> 21) & 0x07;
nkeynes@189
   224
	    int context_length = 3;
nkeynes@189
   225
	    if( is_modified && !cheap_modifier_mode ) {
nkeynes@189
   226
		context_length = 5;
nkeynes@189
   227
		vertex_length *= 2 ;
nkeynes@189
   228
	    }
nkeynes@189
   229
	    vertex_length += 3;
nkeynes@308
   230
	    
nkeynes@189
   231
	    if( (entry & 0xE0000000) == 0x80000000 ) {
nkeynes@189
   232
		/* Triangle(s) */
nkeynes@189
   233
		int strip_count = ((entry >> 25) & 0x0F)+1;
nkeynes@189
   234
		int polygon_length = 3 * vertex_length + context_length;
nkeynes@189
   235
		int i;
nkeynes@189
   236
		for( i=0; i<strip_count; i++ ) {
nkeynes@189
   237
		    render_set_context( polygon, render_mode );
nkeynes@189
   238
		    render_vertexes( *polygon, polygon+context_length, 3, vertex_length,
nkeynes@189
   239
				     render_mode );
nkeynes@189
   240
		    polygon += polygon_length;
nkeynes@189
   241
		}
nkeynes@189
   242
	    } else if( (entry & 0xE0000000) == 0xA0000000 ) {
nkeynes@189
   243
		/* Sprite(s) */
nkeynes@189
   244
		int strip_count = (entry >> 25) & 0x0F;
nkeynes@189
   245
		int polygon_length = 4 * vertex_length + context_length;
nkeynes@189
   246
		int i;
nkeynes@189
   247
		for( i=0; i<strip_count; i++ ) {
nkeynes@189
   248
		    render_set_context( polygon, render_mode );
nkeynes@189
   249
		    render_vertexes( *polygon, polygon+context_length, 4, vertex_length,
nkeynes@189
   250
				     render_mode );
nkeynes@189
   251
		    polygon += polygon_length;
nkeynes@189
   252
		}
nkeynes@189
   253
	    } else {
nkeynes@189
   254
		/* Polygon */
nkeynes@189
   255
		int i, first=-1, last = -1;
nkeynes@189
   256
		for( i=0; i<6; i++ ) {
nkeynes@189
   257
		    if( entry & (0x40000000>>i) ) {
nkeynes@189
   258
			if( first == -1 ) first = i;
nkeynes@189
   259
			last = i;
nkeynes@189
   260
		    }
nkeynes@189
   261
		}
nkeynes@189
   262
		if( first != -1 ) {
nkeynes@189
   263
		    first = 0;
nkeynes@189
   264
		    render_set_context(polygon, render_mode);
nkeynes@189
   265
		    render_vertexes( *polygon, polygon+context_length + (first*vertex_length),
nkeynes@189
   266
				     (last-first+3), vertex_length, render_mode );
nkeynes@189
   267
		}
nkeynes@189
   268
	    }
nkeynes@189
   269
	}
nkeynes@189
   270
    } while( 1 );
nkeynes@189
   271
}
nkeynes@189
   272
nkeynes@189
   273
void pvr2_render_tilebuffer( int width, int height, int clipx1, int clipy1, 
nkeynes@189
   274
			int clipx2, int clipy2 ) {
nkeynes@189
   275
nkeynes@191
   276
    pvraddr_t segmentbase = MMIO_READ( PVR2, RENDER_TILEBASE );
nkeynes@189
   277
    int tile_sort;
nkeynes@189
   278
    gboolean cheap_shadow;
nkeynes@189
   279
nkeynes@191
   280
    int obj_config = MMIO_READ( PVR2, RENDER_OBJCFG );
nkeynes@191
   281
    int isp_config = MMIO_READ( PVR2, RENDER_ISPCFG );
nkeynes@191
   282
    int shadow_cfg = MMIO_READ( PVR2, RENDER_SHADOW );
nkeynes@189
   283
nkeynes@222
   284
    if( (obj_config & 0x00200000) == 0 ) {
nkeynes@189
   285
	if( isp_config & 1 ) {
nkeynes@189
   286
	    tile_sort = 0;
nkeynes@189
   287
	} else {
nkeynes@189
   288
	    tile_sort = 2;
nkeynes@189
   289
	}
nkeynes@189
   290
    } else {
nkeynes@189
   291
	tile_sort = 1;
nkeynes@189
   292
    }
nkeynes@189
   293
nkeynes@189
   294
    cheap_shadow = shadow_cfg & 0x100 ? TRUE : FALSE;
nkeynes@189
   295
nkeynes@189
   296
    struct tile_segment *segment = (struct tile_segment *)(video_base + segmentbase);
nkeynes@189
   297
nkeynes@215
   298
    struct timeval tv_start, tv_end;
nkeynes@215
   299
    gettimeofday(&tv_start, NULL);
nkeynes@189
   300
    glEnable( GL_SCISSOR_TEST );
nkeynes@268
   301
    do {
nkeynes@221
   302
	// fwrite_dump32v( (uint32_t *)segment, sizeof(struct tile_segment), 6, stderr );
nkeynes@189
   303
	int tilex = SEGMENT_X(segment->control);
nkeynes@189
   304
	int tiley = SEGMENT_Y(segment->control);
nkeynes@189
   305
	
nkeynes@189
   306
	int x1 = tilex << 5;
nkeynes@189
   307
	int y1 = tiley << 5;
nkeynes@189
   308
	if( x1 + 32 <= clipx1 ||
nkeynes@189
   309
	    y1 + 32 <= clipy1 ||
nkeynes@189
   310
	    x1 >= clipx2 ||
nkeynes@189
   311
	    y1 >= clipy2 ) {
nkeynes@189
   312
	    /* Tile completely clipped, skip */
nkeynes@189
   313
	    continue;
nkeynes@189
   314
	}
nkeynes@215
   315
nkeynes@189
   316
	/* Set a scissor on the visible part of the tile */
nkeynes@189
   317
	int w = MIN(x1+32, clipx2) - x1;
nkeynes@189
   318
	int h = MIN(y1+32, clipy2) - y1;
nkeynes@189
   319
	x1 = MAX(x1,clipx1);
nkeynes@189
   320
	y1 = MAX(y1,clipy1);
nkeynes@189
   321
	glScissor( x1, height-y1-h, w, h );
nkeynes@189
   322
nkeynes@189
   323
	if( (segment->opaque_ptr & NO_POINTER) == 0 ) {
nkeynes@189
   324
	    if( (segment->opaquemod_ptr & NO_POINTER) == 0 ) {
nkeynes@189
   325
		/* TODO */
nkeynes@189
   326
	    }
nkeynes@189
   327
	    render_tile( segment->opaque_ptr, RENDER_NORMAL, cheap_shadow );
nkeynes@189
   328
	}
nkeynes@189
   329
nkeynes@189
   330
	if( (segment->trans_ptr & NO_POINTER) == 0 ) {
nkeynes@189
   331
	    if( (segment->transmod_ptr & NO_POINTER) == 0 ) {
nkeynes@189
   332
		/* TODO */
nkeynes@189
   333
	    } 
nkeynes@222
   334
	    if( tile_sort == 2 || 
nkeynes@222
   335
		(tile_sort == 1 && ((segment->control & SEGMENT_SORT_TRANS)==0)) ) {
nkeynes@189
   336
		render_autosort_tile( segment->trans_ptr, RENDER_NORMAL, cheap_shadow );
nkeynes@189
   337
	    } else {
nkeynes@189
   338
		render_tile( segment->trans_ptr, RENDER_NORMAL, cheap_shadow );
nkeynes@189
   339
	    }
nkeynes@189
   340
	}
nkeynes@189
   341
nkeynes@189
   342
	if( (segment->punchout_ptr & NO_POINTER) == 0 ) {
nkeynes@189
   343
	    render_tile( segment->punchout_ptr, RENDER_NORMAL, cheap_shadow );
nkeynes@189
   344
	}
nkeynes@268
   345
    } while( ((segment++)->control & SEGMENT_END) == 0 );
nkeynes@189
   346
    glDisable( GL_SCISSOR_TEST );
nkeynes@215
   347
nkeynes@215
   348
    gettimeofday(&tv_end, NULL);
nkeynes@215
   349
    timersub(&tv_end,&tv_start, &tv_start);
nkeynes@189
   350
}
.