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lxdream.org :: lxdream/src/pvr2/pvr2.c
lxdream 0.9.1
released Jun 29
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filename src/pvr2/pvr2.c
changeset 805:b355f7b3ff2e
prev736:a02d1475ccfd
next850:28782ebbd01d
author nkeynes
date Thu Aug 07 23:53:17 2008 +0000 (11 years ago)
permissions -rw-r--r--
last change Add ability to bind a render buffer to a texture, with output going to the texture.
(RTT work in progress)
file annotate diff log raw
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/**
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 * $Id$
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 *
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 * PVR2 (Video) Core module implementation and MMIO registers.
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 *
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 * Copyright (c) 2005 Nathan Keynes.
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 *
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 * This program is free software; you can redistribute it and/or modify
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 * it under the terms of the GNU General Public License as published by
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 * the Free Software Foundation; either version 2 of the License, or
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 * (at your option) any later version.
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 *
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 * This program is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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 * GNU General Public License for more details.
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 */
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#define MODULE pvr2_module
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#include <assert.h>
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#include "dream.h"
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#include "eventq.h"
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#include "display.h"
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#include "mem.h"
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#include "asic.h"
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#include "clock.h"
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#include "pvr2/pvr2.h"
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#include "pvr2/pvr2mmio.h"
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#include "pvr2/scene.h"
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#include "sh4/sh4.h"
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#define MMIO_IMPL
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#include "pvr2/pvr2mmio.h"
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unsigned char *video_base;
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#define MAX_RENDER_BUFFERS 4
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#define HPOS_PER_FRAME 0
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#define HPOS_PER_LINECOUNT 1
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static void pvr2_init( void );
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static void pvr2_reset( void );
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static uint32_t pvr2_run_slice( uint32_t );
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static void pvr2_save_state( FILE *f );
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static int pvr2_load_state( FILE *f );
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static void pvr2_update_raster_posn( uint32_t nanosecs );
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static void pvr2_schedule_scanline_event( int eventid, int line, int minimum_lines, int line_time_ns );
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static render_buffer_t pvr2_get_render_buffer( frame_buffer_t frame );
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static render_buffer_t pvr2_next_render_buffer( );
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static render_buffer_t pvr2_frame_buffer_to_render_buffer( frame_buffer_t frame );
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uint32_t pvr2_get_sync_status();
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void pvr2_display_frame( void );
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static int output_colour_formats[] = { COLFMT_BGRA1555, COLFMT_RGB565, COLFMT_BGR888, COLFMT_BGRA8888 };
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struct dreamcast_module pvr2_module = { "PVR2", pvr2_init, pvr2_reset, NULL, 
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        pvr2_run_slice, NULL,
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        pvr2_save_state, pvr2_load_state };
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display_driver_t display_driver = NULL;
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struct pvr2_state {
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    uint32_t frame_count;
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    uint32_t line_count;
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    uint32_t line_remainder;
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    uint32_t cycles_run; /* Cycles already executed prior to main time slice */
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    uint32_t irq_hpos_line;
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    uint32_t irq_hpos_line_count;
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    uint32_t irq_hpos_mode;
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    uint32_t irq_hpos_time_ns; /* Time within the line */
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    uint32_t irq_vpos1;
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    uint32_t irq_vpos2;
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    uint32_t odd_even_field; /* 1 = odd, 0 = even */
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    int32_t palette_changed; /* TRUE if palette has changed since last render */
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    uint32_t padding; /* FIXME: Remove in next DST version */
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    /* timing */
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    uint32_t dot_clock;
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    uint32_t total_lines;
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    uint32_t line_size;
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    uint32_t line_time_ns;
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    uint32_t vsync_lines;
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    uint32_t hsync_width_ns;
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    uint32_t front_porch_ns;
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    uint32_t back_porch_ns;
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    uint32_t retrace_start_line;
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    uint32_t retrace_end_line;
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    int32_t interlaced;
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} pvr2_state;
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static gchar *save_next_render_filename;
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static render_buffer_t render_buffers[MAX_RENDER_BUFFERS];
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static uint32_t render_buffer_count = 0;
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static render_buffer_t displayed_render_buffer = NULL;
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static uint32_t displayed_border_colour = 0;
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/**
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 * Event handler for the hpos callback
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 */
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static void pvr2_hpos_callback( int eventid ) {
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    asic_event( eventid );
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    pvr2_update_raster_posn(sh4r.slice_cycle);
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    if( pvr2_state.irq_hpos_mode == HPOS_PER_LINECOUNT ) {
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        pvr2_state.irq_hpos_line += pvr2_state.irq_hpos_line_count;
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        while( pvr2_state.irq_hpos_line > (pvr2_state.total_lines>>1) ) {
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            pvr2_state.irq_hpos_line -= (pvr2_state.total_lines>>1);
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        }
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    }
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    pvr2_schedule_scanline_event( eventid, pvr2_state.irq_hpos_line, 1, 
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                                  pvr2_state.irq_hpos_time_ns );
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}
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/**
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 * Event handler for the scanline callbacks. Fires the corresponding
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 * ASIC event, and resets the timer for the next field.
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 */
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static void pvr2_scanline_callback( int eventid ) {
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    asic_event( eventid );
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    pvr2_update_raster_posn(sh4r.slice_cycle);
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    if( eventid == EVENT_SCANLINE1 ) {
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        pvr2_schedule_scanline_event( eventid, pvr2_state.irq_vpos1, 1, 0 );
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    } else {
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        pvr2_schedule_scanline_event( eventid, pvr2_state.irq_vpos2, 1, 0 );
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    }
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}
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static void pvr2_init( void )
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{
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    int i;
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    register_io_region( &mmio_region_PVR2 );
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    register_io_region( &mmio_region_PVR2PAL );
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    register_io_region( &mmio_region_PVR2TA );
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    register_event_callback( EVENT_HPOS, pvr2_hpos_callback );
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    register_event_callback( EVENT_SCANLINE1, pvr2_scanline_callback );
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    register_event_callback( EVENT_SCANLINE2, pvr2_scanline_callback );
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    video_base = mem_get_region_by_name( MEM_REGION_VIDEO );
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    texcache_init();
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    pvr2_reset();
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    pvr2_ta_reset();
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    save_next_render_filename = NULL;
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    for( i=0; i<MAX_RENDER_BUFFERS; i++ ) {
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        render_buffers[i] = NULL;
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    }
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    render_buffer_count = 0;
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    displayed_render_buffer = NULL;
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    displayed_border_colour = 0;
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}
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static void pvr2_reset( void )
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{
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    int i;
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    pvr2_state.line_count = 0;
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    pvr2_state.line_remainder = 0;
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    pvr2_state.cycles_run = 0;
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    pvr2_state.irq_vpos1 = 0;
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    pvr2_state.irq_vpos2 = 0;
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    pvr2_state.dot_clock = PVR2_DOT_CLOCK;
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    pvr2_state.back_porch_ns = 4000;
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    pvr2_state.palette_changed = FALSE;
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    mmio_region_PVR2_write( DISP_TOTAL, 0x0270035F );
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    mmio_region_PVR2_write( DISP_SYNCTIME, 0x07D6A53F );
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    mmio_region_PVR2_write( YUV_ADDR, 0 );
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    mmio_region_PVR2_write( YUV_CFG, 0 );
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    pvr2_ta_init();
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    texcache_flush();
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    if( display_driver ) {
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        display_driver->display_blank(0);
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        for( i=0; i<render_buffer_count; i++ ) {
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            display_driver->destroy_render_buffer(render_buffers[i]);
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            render_buffers[i] = NULL;
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        }
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        render_buffer_count = 0;
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    }
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}
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void pvr2_save_render_buffer( FILE *f, render_buffer_t buffer )
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{
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    struct frame_buffer fbuf;
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    fbuf.width = buffer->width;
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    fbuf.height = buffer->height;
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    fbuf.rowstride = fbuf.width*3;
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    fbuf.colour_format = COLFMT_BGR888;
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    fbuf.inverted = buffer->inverted;
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    fbuf.data = g_malloc0( buffer->width * buffer->height * 3 );
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    display_driver->read_render_buffer( fbuf.data, buffer, fbuf.rowstride, COLFMT_BGR888 );
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    write_png_to_stream( f, &fbuf );
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    g_free( fbuf.data );
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    fwrite( &buffer->rowstride, sizeof(buffer->rowstride), 1, f );
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    fwrite( &buffer->colour_format, sizeof(buffer->colour_format), 1, f );
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    fwrite( &buffer->address, sizeof(buffer->address), 1, f );
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    fwrite( &buffer->scale, sizeof(buffer->scale), 1, f );
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    int32_t flushed = (int32_t)buffer->flushed; // Force to 32-bits for save-file consistency
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    fwrite( &flushed, sizeof(flushed), 1, f );
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}
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render_buffer_t pvr2_load_render_buffer( FILE *f )
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{
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    frame_buffer_t frame = read_png_from_stream( f );
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    if( frame == NULL ) {
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        return NULL;
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    }
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    render_buffer_t buffer = pvr2_frame_buffer_to_render_buffer(frame);
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    if( buffer != NULL ) {
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        int32_t flushed;
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        fread( &buffer->rowstride, sizeof(buffer->rowstride), 1, f );
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        fread( &buffer->colour_format, sizeof(buffer->colour_format), 1, f );
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        fread( &buffer->address, sizeof(buffer->address), 1, f );
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        fread( &buffer->scale, sizeof(buffer->scale), 1, f );
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        fread( &flushed, sizeof(flushed), 1, f );
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        buffer->flushed = (gboolean)flushed;
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    } else {
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        fseek( f, sizeof(buffer->rowstride)+sizeof(buffer->colour_format)+
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                sizeof(buffer->address)+sizeof(buffer->scale)+
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                sizeof(int32_t), SEEK_CUR );
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    }
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    return buffer;
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}
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void pvr2_save_render_buffers( FILE *f )
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{
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    int i;
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    uint32_t has_frontbuffer;
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    fwrite( &render_buffer_count, sizeof(render_buffer_count), 1, f );
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    if( displayed_render_buffer != NULL ) {
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        has_frontbuffer = 1;
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        fwrite( &has_frontbuffer, sizeof(has_frontbuffer), 1, f );
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        pvr2_save_render_buffer( f, displayed_render_buffer );
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    } else {
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        has_frontbuffer = 0;
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        fwrite( &has_frontbuffer, sizeof(has_frontbuffer), 1, f );
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    }
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    for( i=0; i<render_buffer_count; i++ ) {
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        if( render_buffers[i] != displayed_render_buffer && render_buffers[i] != NULL ) {
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            pvr2_save_render_buffer( f, render_buffers[i] );
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        }
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    }
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}
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gboolean pvr2_load_render_buffers( FILE *f )
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{
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    uint32_t count, has_frontbuffer;
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    int i;
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    fread( &count, sizeof(count), 1, f );
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    if( count > MAX_RENDER_BUFFERS ) {
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        return FALSE;
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    }
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    fread( &has_frontbuffer, sizeof(has_frontbuffer), 1, f );
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    for( i=0; i<render_buffer_count; i++ ) {
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        display_driver->destroy_render_buffer(render_buffers[i]);
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        render_buffers[i] = NULL;
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    }
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    render_buffer_count = 0;
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    if( has_frontbuffer ) {
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        displayed_render_buffer = pvr2_load_render_buffer(f);
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        display_driver->display_render_buffer( displayed_render_buffer );
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        count--;
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    }
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    for( i=0; i<count; i++ ) {
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        pvr2_load_render_buffer( f );
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    }
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    return TRUE;
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}
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static void pvr2_save_state( FILE *f )
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{
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    pvr2_save_render_buffers( f );
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    fwrite( &pvr2_state, sizeof(pvr2_state), 1, f );
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    pvr2_ta_save_state( f );
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    pvr2_yuv_save_state( f );
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}
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static int pvr2_load_state( FILE *f )
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{
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    if( !pvr2_load_render_buffers(f) )
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        return 1;
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    if( fread( &pvr2_state, sizeof(pvr2_state), 1, f ) != 1 )
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        return 1;
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    if( pvr2_ta_load_state(f) ) {
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        return 1;
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    }
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    return pvr2_yuv_load_state(f);
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}
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/**
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 * Update the current raster position to the given number of nanoseconds,
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 * relative to the last time slice. (ie the raster will be adjusted forward
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 * by nanosecs - nanosecs_already_run_this_timeslice)
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 */
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static void pvr2_update_raster_posn( uint32_t nanosecs )
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{
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    uint32_t old_line_count = pvr2_state.line_count;
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    if( pvr2_state.line_time_ns == 0 ) {
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        return; /* do nothing */
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    }
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    pvr2_state.line_remainder += (nanosecs - pvr2_state.cycles_run);
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    pvr2_state.cycles_run = nanosecs;
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    while( pvr2_state.line_remainder >= pvr2_state.line_time_ns ) {
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        pvr2_state.line_count ++;
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        pvr2_state.line_remainder -= pvr2_state.line_time_ns;
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    }
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   316
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    if( pvr2_state.line_count >= pvr2_state.total_lines ) {
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        pvr2_state.line_count -= pvr2_state.total_lines;
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   319
        if( pvr2_state.interlaced ) {
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            pvr2_state.odd_even_field = !pvr2_state.odd_even_field;
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        }
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    }
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    if( pvr2_state.line_count >= pvr2_state.retrace_end_line &&
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            (old_line_count < pvr2_state.retrace_end_line ||
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                    old_line_count > pvr2_state.line_count) ) {
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        pvr2_state.frame_count++;
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        pvr2_display_frame();
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    }
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   329
}
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   330
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static uint32_t pvr2_run_slice( uint32_t nanosecs ) 
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   332
{
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   333
    pvr2_update_raster_posn( nanosecs );
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   334
    pvr2_state.cycles_run = 0;
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   335
    return nanosecs;
nkeynes@133
   336
}
nkeynes@133
   337
nkeynes@133
   338
int pvr2_get_frame_count() 
nkeynes@133
   339
{
nkeynes@133
   340
    return pvr2_state.frame_count;
nkeynes@106
   341
}
nkeynes@106
   342
nkeynes@677
   343
void pvr2_redraw_display()
nkeynes@477
   344
{
nkeynes@677
   345
    if( display_driver != NULL ) {
nkeynes@677
   346
        if( displayed_render_buffer == NULL ) {
nkeynes@677
   347
            display_driver->display_blank(displayed_border_colour);
nkeynes@677
   348
        } else {
nkeynes@677
   349
            display_driver->display_render_buffer(displayed_render_buffer);
nkeynes@677
   350
        }
nkeynes@677
   351
    }
nkeynes@545
   352
}
nkeynes@545
   353
nkeynes@295
   354
gboolean pvr2_save_next_scene( const gchar *filename )
nkeynes@295
   355
{
nkeynes@674
   356
    if( save_next_render_filename != NULL ) {
nkeynes@736
   357
        g_free( save_next_render_filename );
nkeynes@295
   358
    } 
nkeynes@674
   359
    save_next_render_filename = g_strdup(filename);
nkeynes@295
   360
    return TRUE;
nkeynes@295
   361
}
nkeynes@295
   362
nkeynes@295
   363
nkeynes@295
   364
nkeynes@103
   365
/**
nkeynes@1
   366
 * Display the next frame, copying the current contents of video ram to
nkeynes@1
   367
 * the window. If the video configuration has changed, first recompute the
nkeynes@1
   368
 * new frame size/depth.
nkeynes@1
   369
 */
nkeynes@94
   370
void pvr2_display_frame( void )
nkeynes@1
   371
{
nkeynes@197
   372
    int dispmode = MMIO_READ( PVR2, DISP_MODE );
nkeynes@261
   373
    int vidcfg = MMIO_READ( PVR2, DISP_SYNCCFG );
nkeynes@335
   374
    gboolean bEnabled = (dispmode & DISPMODE_ENABLE) && (vidcfg & DISPCFG_VO ) ? TRUE : FALSE;
nkeynes@352
   375
nkeynes@352
   376
    if( display_driver == NULL ) {
nkeynes@736
   377
        return; /* can't really do anything much */
nkeynes@352
   378
    } else if( !bEnabled ) {
nkeynes@736
   379
        /* Output disabled == black */
nkeynes@736
   380
        displayed_render_buffer = NULL;
nkeynes@736
   381
        displayed_border_colour = 0;
nkeynes@736
   382
        display_driver->display_blank( 0 ); 
nkeynes@352
   383
    } else if( MMIO_READ( PVR2, DISP_CFG2 ) & 0x08 ) { 
nkeynes@736
   384
        /* Enabled but blanked - border colour */
nkeynes@736
   385
        displayed_border_colour = MMIO_READ( PVR2, DISP_BORDER );
nkeynes@736
   386
        displayed_render_buffer = NULL;
nkeynes@736
   387
        display_driver->display_blank( displayed_border_colour );
nkeynes@352
   388
    } else {
nkeynes@736
   389
        /* Real output - determine dimensions etc */
nkeynes@736
   390
        struct frame_buffer fbuf;
nkeynes@736
   391
        uint32_t dispsize = MMIO_READ( PVR2, DISP_SIZE );
nkeynes@736
   392
        int vid_stride = (((dispsize & DISPSIZE_MODULO) >> 20) - 1);
nkeynes@736
   393
        int vid_ppl = ((dispsize & DISPSIZE_PPL)) + 1;
nkeynes@352
   394
nkeynes@736
   395
        fbuf.colour_format = output_colour_formats[(dispmode & DISPMODE_COLFMT) >> 2];
nkeynes@736
   396
        fbuf.width = vid_ppl << 2 / colour_formats[fbuf.colour_format].bpp;
nkeynes@736
   397
        fbuf.height = ((dispsize & DISPSIZE_LPF) >> 10) + 1;
nkeynes@736
   398
        fbuf.size = vid_ppl << 2 * fbuf.height;
nkeynes@736
   399
        fbuf.rowstride = (vid_ppl + vid_stride) << 2;
nkeynes@352
   400
nkeynes@736
   401
        /* Determine the field to display, and deinterlace if possible */
nkeynes@736
   402
        if( pvr2_state.interlaced ) {
nkeynes@736
   403
            if( vid_ppl == vid_stride ) { /* Magic deinterlace */
nkeynes@736
   404
                fbuf.height = fbuf.height << 1;
nkeynes@736
   405
                fbuf.rowstride = vid_ppl << 2;
nkeynes@736
   406
                fbuf.address = MMIO_READ( PVR2, DISP_ADDR1 );
nkeynes@736
   407
            } else { 
nkeynes@736
   408
                /* Just display the field as is, folks. This is slightly tricky -
nkeynes@736
   409
                 * we pick the field based on which frame is about to come through,
nkeynes@736
   410
                 * which may not be the same as the odd_even_field.
nkeynes@736
   411
                 */
nkeynes@736
   412
                gboolean oddfield = pvr2_state.odd_even_field;
nkeynes@736
   413
                if( pvr2_state.line_count >= pvr2_state.retrace_start_line ) {
nkeynes@736
   414
                    oddfield = !oddfield;
nkeynes@736
   415
                }
nkeynes@736
   416
                if( oddfield ) {
nkeynes@736
   417
                    fbuf.address = MMIO_READ( PVR2, DISP_ADDR1 );
nkeynes@736
   418
                } else {
nkeynes@736
   419
                    fbuf.address = MMIO_READ( PVR2, DISP_ADDR2 );
nkeynes@736
   420
                }
nkeynes@736
   421
            }
nkeynes@736
   422
        } else {
nkeynes@736
   423
            fbuf.address = MMIO_READ( PVR2, DISP_ADDR1 );
nkeynes@736
   424
        }
nkeynes@736
   425
        fbuf.address = (fbuf.address & 0x00FFFFFF) + PVR2_RAM_BASE;
nkeynes@736
   426
        fbuf.inverted = FALSE;
nkeynes@736
   427
        fbuf.data = video_base + (fbuf.address&0x00FFFFFF);
nkeynes@352
   428
nkeynes@736
   429
        render_buffer_t rbuf = pvr2_get_render_buffer( &fbuf );
nkeynes@736
   430
        if( rbuf == NULL ) {
nkeynes@736
   431
            rbuf = pvr2_frame_buffer_to_render_buffer( &fbuf );
nkeynes@736
   432
        }
nkeynes@736
   433
        displayed_render_buffer = rbuf;
nkeynes@736
   434
        if( rbuf != NULL ) {
nkeynes@736
   435
            display_driver->display_render_buffer( rbuf );
nkeynes@736
   436
        }
nkeynes@1
   437
    }
nkeynes@1
   438
}
nkeynes@1
   439
nkeynes@197
   440
/**
nkeynes@197
   441
 * This has to handle every single register individually as they all get masked 
nkeynes@197
   442
 * off differently (and its easier to do it at write time)
nkeynes@197
   443
 */
nkeynes@1
   444
void mmio_region_PVR2_write( uint32_t reg, uint32_t val )
nkeynes@1
   445
{
nkeynes@1
   446
    if( reg >= 0x200 && reg < 0x600 ) { /* Fog table */
nkeynes@1
   447
        MMIO_WRITE( PVR2, reg, val );
nkeynes@1
   448
        return;
nkeynes@1
   449
    }
nkeynes@736
   450
nkeynes@1
   451
    switch(reg) {
nkeynes@189
   452
    case PVRID:
nkeynes@189
   453
    case PVRVER:
nkeynes@261
   454
    case GUNPOS: /* Read only registers */
nkeynes@736
   455
        break;
nkeynes@197
   456
    case PVRRESET:
nkeynes@736
   457
        val &= 0x00000007; /* Do stuff? */
nkeynes@736
   458
        MMIO_WRITE( PVR2, reg, val );
nkeynes@736
   459
        break;
nkeynes@295
   460
    case RENDER_START: /* Don't really care what value */
nkeynes@736
   461
        if( save_next_render_filename != NULL ) {
nkeynes@736
   462
            if( pvr2_render_save_scene(save_next_render_filename) == 0 ) {
nkeynes@736
   463
                INFO( "Saved scene to %s", save_next_render_filename);
nkeynes@736
   464
            }
nkeynes@736
   465
            g_free( save_next_render_filename );
nkeynes@736
   466
            save_next_render_filename = NULL;
nkeynes@736
   467
        }
nkeynes@736
   468
        pvr2_scene_read();
nkeynes@736
   469
        render_buffer_t buffer = pvr2_next_render_buffer();
nkeynes@736
   470
        if( buffer != NULL ) {
nkeynes@736
   471
            pvr2_scene_render( buffer );
nkeynes@736
   472
        }
nkeynes@736
   473
        asic_event( EVENT_PVR_RENDER_DONE );
nkeynes@736
   474
        break;
nkeynes@191
   475
    case RENDER_POLYBASE:
nkeynes@736
   476
        MMIO_WRITE( PVR2, reg, val&0x00F00000 );
nkeynes@736
   477
        break;
nkeynes@191
   478
    case RENDER_TSPCFG:
nkeynes@736
   479
        MMIO_WRITE( PVR2, reg, val&0x00010101 );
nkeynes@736
   480
        break;
nkeynes@197
   481
    case DISP_BORDER:
nkeynes@736
   482
        MMIO_WRITE( PVR2, reg, val&0x01FFFFFF );
nkeynes@736
   483
        break;
nkeynes@197
   484
    case DISP_MODE:
nkeynes@736
   485
        MMIO_WRITE( PVR2, reg, val&0x00FFFF7F );
nkeynes@736
   486
        break;
nkeynes@191
   487
    case RENDER_MODE:
nkeynes@736
   488
        MMIO_WRITE( PVR2, reg, val&0x00FFFF0F );
nkeynes@736
   489
        break;
nkeynes@191
   490
    case RENDER_SIZE:
nkeynes@736
   491
        MMIO_WRITE( PVR2, reg, val&0x000001FF );
nkeynes@736
   492
        break;
nkeynes@197
   493
    case DISP_ADDR1:
nkeynes@736
   494
        val &= 0x00FFFFFC;
nkeynes@736
   495
        MMIO_WRITE( PVR2, reg, val );
nkeynes@736
   496
        pvr2_update_raster_posn(sh4r.slice_cycle);
nkeynes@736
   497
        break;
nkeynes@197
   498
    case DISP_ADDR2:
nkeynes@736
   499
        MMIO_WRITE( PVR2, reg, val&0x00FFFFFC );
nkeynes@736
   500
        pvr2_update_raster_posn(sh4r.slice_cycle);
nkeynes@736
   501
        break;
nkeynes@197
   502
    case DISP_SIZE:
nkeynes@736
   503
        MMIO_WRITE( PVR2, reg, val&0x3FFFFFFF );
nkeynes@736
   504
        break;
nkeynes@191
   505
    case RENDER_ADDR1:
nkeynes@191
   506
    case RENDER_ADDR2:
nkeynes@736
   507
        MMIO_WRITE( PVR2, reg, val&0x01FFFFFC );
nkeynes@736
   508
        break;
nkeynes@191
   509
    case RENDER_HCLIP:
nkeynes@736
   510
        MMIO_WRITE( PVR2, reg, val&0x07FF07FF );
nkeynes@736
   511
        break;
nkeynes@191
   512
    case RENDER_VCLIP:
nkeynes@736
   513
        MMIO_WRITE( PVR2, reg, val&0x03FF03FF );
nkeynes@736
   514
        break;
nkeynes@197
   515
    case DISP_HPOSIRQ:
nkeynes@736
   516
        MMIO_WRITE( PVR2, reg, val&0x03FF33FF );
nkeynes@736
   517
        pvr2_state.irq_hpos_line = val & 0x03FF;
nkeynes@736
   518
        pvr2_state.irq_hpos_time_ns = 2000000*((val>>16)&0x03FF)/pvr2_state.dot_clock;
nkeynes@736
   519
        pvr2_state.irq_hpos_mode = (val >> 12) & 0x03;
nkeynes@736
   520
        switch( pvr2_state.irq_hpos_mode ) {
nkeynes@736
   521
        case 3: /* Reserved - treat as 0 */
nkeynes@736
   522
        case 0: /* Once per frame at specified line */
nkeynes@736
   523
            pvr2_state.irq_hpos_mode = HPOS_PER_FRAME;
nkeynes@736
   524
            break;
nkeynes@736
   525
        case 2: /* Once per line - as per-line-count */
nkeynes@736
   526
            pvr2_state.irq_hpos_line = 1;
nkeynes@736
   527
            pvr2_state.irq_hpos_mode = 1;
nkeynes@736
   528
        case 1: /* Once per N lines */
nkeynes@736
   529
            pvr2_state.irq_hpos_line_count = pvr2_state.irq_hpos_line;
nkeynes@736
   530
            pvr2_state.irq_hpos_line = (pvr2_state.line_count >> 1) + 
nkeynes@736
   531
            pvr2_state.irq_hpos_line_count;
nkeynes@736
   532
            while( pvr2_state.irq_hpos_line > (pvr2_state.total_lines>>1) ) {
nkeynes@736
   533
                pvr2_state.irq_hpos_line -= (pvr2_state.total_lines>>1);
nkeynes@736
   534
            }
nkeynes@736
   535
            pvr2_state.irq_hpos_mode = HPOS_PER_LINECOUNT;
nkeynes@736
   536
        }
nkeynes@736
   537
        pvr2_schedule_scanline_event( EVENT_HPOS, pvr2_state.irq_hpos_line, 0,
nkeynes@736
   538
                                      pvr2_state.irq_hpos_time_ns );
nkeynes@736
   539
        break;
nkeynes@736
   540
        case DISP_VPOSIRQ:
nkeynes@736
   541
            val = val & 0x03FF03FF;
nkeynes@736
   542
            pvr2_state.irq_vpos1 = (val >> 16);
nkeynes@736
   543
            pvr2_state.irq_vpos2 = val & 0x03FF;
nkeynes@736
   544
            pvr2_update_raster_posn(sh4r.slice_cycle);
nkeynes@736
   545
            pvr2_schedule_scanline_event( EVENT_SCANLINE1, pvr2_state.irq_vpos1, 0, 0 );
nkeynes@736
   546
            pvr2_schedule_scanline_event( EVENT_SCANLINE2, pvr2_state.irq_vpos2, 0, 0 );
nkeynes@736
   547
            MMIO_WRITE( PVR2, reg, val );
nkeynes@736
   548
            break;
nkeynes@736
   549
        case RENDER_NEARCLIP:
nkeynes@736
   550
            MMIO_WRITE( PVR2, reg, val & 0x7FFFFFFF );
nkeynes@736
   551
            break;
nkeynes@736
   552
        case RENDER_SHADOW:
nkeynes@736
   553
            MMIO_WRITE( PVR2, reg, val&0x000001FF );
nkeynes@736
   554
            break;
nkeynes@736
   555
        case RENDER_OBJCFG:
nkeynes@736
   556
            MMIO_WRITE( PVR2, reg, val&0x003FFFFF );
nkeynes@736
   557
            break;
nkeynes@736
   558
        case RENDER_TSPCLIP:
nkeynes@736
   559
            MMIO_WRITE( PVR2, reg, val&0x7FFFFFFF );
nkeynes@736
   560
            break;
nkeynes@736
   561
        case RENDER_FARCLIP:
nkeynes@736
   562
            MMIO_WRITE( PVR2, reg, val&0xFFFFFFF0 );
nkeynes@736
   563
            break;
nkeynes@736
   564
        case RENDER_BGPLANE:
nkeynes@736
   565
            MMIO_WRITE( PVR2, reg, val&0x1FFFFFFF );
nkeynes@736
   566
            break;
nkeynes@736
   567
        case RENDER_ISPCFG:
nkeynes@736
   568
            MMIO_WRITE( PVR2, reg, val&0x00FFFFF9 );
nkeynes@736
   569
            break;
nkeynes@736
   570
        case VRAM_CFG1:
nkeynes@736
   571
            MMIO_WRITE( PVR2, reg, val&0x000000FF );
nkeynes@736
   572
            break;
nkeynes@736
   573
        case VRAM_CFG2:
nkeynes@736
   574
            MMIO_WRITE( PVR2, reg, val&0x003FFFFF );
nkeynes@736
   575
            break;
nkeynes@736
   576
        case VRAM_CFG3:
nkeynes@736
   577
            MMIO_WRITE( PVR2, reg, val&0x1FFFFFFF );
nkeynes@736
   578
            break;
nkeynes@736
   579
        case RENDER_FOGTBLCOL:
nkeynes@736
   580
        case RENDER_FOGVRTCOL:
nkeynes@736
   581
            MMIO_WRITE( PVR2, reg, val&0x00FFFFFF );
nkeynes@736
   582
            break;
nkeynes@736
   583
        case RENDER_FOGCOEFF:
nkeynes@736
   584
            MMIO_WRITE( PVR2, reg, val&0x0000FFFF );
nkeynes@736
   585
            break;
nkeynes@736
   586
        case RENDER_CLAMPHI:
nkeynes@736
   587
        case RENDER_CLAMPLO:
nkeynes@736
   588
            MMIO_WRITE( PVR2, reg, val );
nkeynes@736
   589
            break;
nkeynes@736
   590
        case RENDER_TEXSIZE:
nkeynes@736
   591
            MMIO_WRITE( PVR2, reg, val&0x00031F1F );
nkeynes@736
   592
            break;
nkeynes@736
   593
        case RENDER_PALETTE:
nkeynes@736
   594
            MMIO_WRITE( PVR2, reg, val&0x00000003 );
nkeynes@736
   595
            break;
nkeynes@736
   596
        case RENDER_ALPHA_REF:
nkeynes@736
   597
            MMIO_WRITE( PVR2, reg, val&0x000000FF );
nkeynes@736
   598
            break;
nkeynes@736
   599
            /********** CRTC registers *************/
nkeynes@736
   600
        case DISP_HBORDER:
nkeynes@736
   601
        case DISP_VBORDER:
nkeynes@736
   602
            MMIO_WRITE( PVR2, reg, val&0x03FF03FF );
nkeynes@736
   603
            break;
nkeynes@736
   604
        case DISP_TOTAL:
nkeynes@736
   605
            val = val & 0x03FF03FF;
nkeynes@736
   606
            MMIO_WRITE( PVR2, reg, val );
nkeynes@736
   607
            pvr2_update_raster_posn(sh4r.slice_cycle);
nkeynes@736
   608
            pvr2_state.total_lines = (val >> 16) + 1;
nkeynes@736
   609
            pvr2_state.line_size = (val & 0x03FF) + 1;
nkeynes@736
   610
            pvr2_state.line_time_ns = 1000000 * pvr2_state.line_size / pvr2_state.dot_clock;
nkeynes@736
   611
            pvr2_state.retrace_end_line = 0x2A;
nkeynes@736
   612
            pvr2_state.retrace_start_line = pvr2_state.total_lines - 6;
nkeynes@736
   613
            pvr2_schedule_scanline_event( EVENT_SCANLINE1, pvr2_state.irq_vpos1, 0, 0 );
nkeynes@736
   614
            pvr2_schedule_scanline_event( EVENT_SCANLINE2, pvr2_state.irq_vpos2, 0, 0 );
nkeynes@736
   615
            pvr2_schedule_scanline_event( EVENT_HPOS, pvr2_state.irq_hpos_line, 0, 
nkeynes@736
   616
                                          pvr2_state.irq_hpos_time_ns );
nkeynes@736
   617
            break;
nkeynes@736
   618
        case DISP_SYNCCFG:
nkeynes@736
   619
            MMIO_WRITE( PVR2, reg, val&0x000003FF );
nkeynes@736
   620
            pvr2_state.interlaced = (val & 0x0010) ? TRUE : FALSE;
nkeynes@736
   621
            break;
nkeynes@736
   622
        case DISP_SYNCTIME:
nkeynes@736
   623
            pvr2_state.vsync_lines = (val >> 8) & 0x0F;
nkeynes@736
   624
            pvr2_state.hsync_width_ns = ((val & 0x7F) + 1) * 2000000 / pvr2_state.dot_clock;
nkeynes@736
   625
            MMIO_WRITE( PVR2, reg, val&0xFFFFFF7F );
nkeynes@736
   626
            break;
nkeynes@736
   627
        case DISP_CFG2:
nkeynes@736
   628
            MMIO_WRITE( PVR2, reg, val&0x003F01FF );
nkeynes@736
   629
            break;
nkeynes@736
   630
        case DISP_HPOS:
nkeynes@736
   631
            val = val & 0x03FF;
nkeynes@736
   632
            pvr2_state.front_porch_ns = (val + 1) * 1000000 / pvr2_state.dot_clock;
nkeynes@736
   633
            MMIO_WRITE( PVR2, reg, val );
nkeynes@736
   634
            break;
nkeynes@736
   635
        case DISP_VPOS:
nkeynes@736
   636
            MMIO_WRITE( PVR2, reg, val&0x03FF03FF );
nkeynes@736
   637
            break;
nkeynes@261
   638
nkeynes@736
   639
            /*********** Tile accelerator registers ***********/
nkeynes@736
   640
        case TA_POLYPOS:
nkeynes@736
   641
        case TA_LISTPOS:
nkeynes@736
   642
            /* Readonly registers */
nkeynes@736
   643
            break;
nkeynes@736
   644
        case TA_TILEBASE:
nkeynes@736
   645
        case TA_LISTEND:
nkeynes@736
   646
        case TA_LISTBASE:
nkeynes@736
   647
            MMIO_WRITE( PVR2, reg, val&0x00FFFFE0 );
nkeynes@736
   648
            break;
nkeynes@736
   649
        case RENDER_TILEBASE:
nkeynes@736
   650
        case TA_POLYBASE:
nkeynes@736
   651
        case TA_POLYEND:
nkeynes@736
   652
            MMIO_WRITE( PVR2, reg, val&0x00FFFFFC );
nkeynes@736
   653
            break;
nkeynes@736
   654
        case TA_TILESIZE:
nkeynes@736
   655
            MMIO_WRITE( PVR2, reg, val&0x000F003F );
nkeynes@736
   656
            break;
nkeynes@736
   657
        case TA_TILECFG:
nkeynes@736
   658
            MMIO_WRITE( PVR2, reg, val&0x00133333 );
nkeynes@736
   659
            break;
nkeynes@736
   660
        case TA_INIT:
nkeynes@736
   661
            if( val & 0x80000000 )
nkeynes@736
   662
                pvr2_ta_init();
nkeynes@736
   663
            break;
nkeynes@736
   664
        case TA_REINIT:
nkeynes@736
   665
            break;
nkeynes@736
   666
            /**************** Scaler registers? ****************/
nkeynes@736
   667
        case RENDER_SCALER:
nkeynes@736
   668
            MMIO_WRITE( PVR2, reg, val&0x0007FFFF );
nkeynes@736
   669
            break;
nkeynes@261
   670
nkeynes@736
   671
        case YUV_ADDR:
nkeynes@736
   672
            val = val & 0x00FFFFF8;
nkeynes@736
   673
            MMIO_WRITE( PVR2, reg, val );
nkeynes@736
   674
            pvr2_yuv_init( val );
nkeynes@736
   675
            break;
nkeynes@736
   676
        case YUV_CFG:
nkeynes@736
   677
            MMIO_WRITE( PVR2, reg, val&0x01013F3F );
nkeynes@736
   678
            pvr2_yuv_set_config(val);
nkeynes@736
   679
            break;
nkeynes@261
   680
nkeynes@736
   681
            /**************** Unknowns ***************/
nkeynes@736
   682
        case PVRUNK1:
nkeynes@736
   683
            MMIO_WRITE( PVR2, reg, val&0x000007FF );
nkeynes@736
   684
            break;
nkeynes@736
   685
        case PVRUNK2:
nkeynes@736
   686
            MMIO_WRITE( PVR2, reg, val&0x00000007 );
nkeynes@736
   687
            break;
nkeynes@736
   688
        case PVRUNK3:
nkeynes@736
   689
            MMIO_WRITE( PVR2, reg, val&0x000FFF3F );
nkeynes@736
   690
            break;
nkeynes@736
   691
        case PVRUNK5:
nkeynes@736
   692
            MMIO_WRITE( PVR2, reg, val&0x0000FFFF );
nkeynes@736
   693
            break;
nkeynes@736
   694
        case PVRUNK7:
nkeynes@736
   695
            MMIO_WRITE( PVR2, reg, val&0x00000001 );
nkeynes@736
   696
            break;
nkeynes@736
   697
        case PVRUNK8:
nkeynes@736
   698
            MMIO_WRITE( PVR2, reg, val&0x0300FFFF );
nkeynes@736
   699
            break;
nkeynes@1
   700
    }
nkeynes@1
   701
}
nkeynes@1
   702
nkeynes@261
   703
/**
nkeynes@261
   704
 * Calculate the current read value of the syncstat register, using
nkeynes@261
   705
 * the current SH4 clock time as an offset from the last timeslice.
nkeynes@261
   706
 * The register reads (LSB to MSB) as:
nkeynes@261
   707
 *     0..9  Current scan line
nkeynes@261
   708
 *     10    Odd/even field (1 = odd, 0 = even)
nkeynes@261
   709
 *     11    Display active (including border and overscan)
nkeynes@261
   710
 *     12    Horizontal sync off
nkeynes@261
   711
 *     13    Vertical sync off
nkeynes@261
   712
 * Note this method is probably incorrect for anything other than straight
nkeynes@265
   713
 * interlaced PAL/NTSC, and needs further testing. 
nkeynes@261
   714
 */
nkeynes@261
   715
uint32_t pvr2_get_sync_status()
nkeynes@261
   716
{
nkeynes@265
   717
    pvr2_update_raster_posn(sh4r.slice_cycle);
nkeynes@265
   718
    uint32_t result = pvr2_state.line_count;
nkeynes@261
   719
nkeynes@265
   720
    if( pvr2_state.odd_even_field ) {
nkeynes@736
   721
        result |= 0x0400;
nkeynes@261
   722
    }
nkeynes@265
   723
    if( (pvr2_state.line_count & 0x01) == pvr2_state.odd_even_field ) {
nkeynes@736
   724
        if( pvr2_state.line_remainder > pvr2_state.hsync_width_ns ) {
nkeynes@736
   725
            result |= 0x1000; /* !HSYNC */
nkeynes@736
   726
        }
nkeynes@736
   727
        if( pvr2_state.line_count >= pvr2_state.vsync_lines ) {
nkeynes@736
   728
            if( pvr2_state.line_remainder > pvr2_state.front_porch_ns ) {
nkeynes@736
   729
                result |= 0x2800; /* Display active */
nkeynes@736
   730
            } else {
nkeynes@736
   731
                result |= 0x2000; /* Front porch */
nkeynes@736
   732
            }
nkeynes@736
   733
        }
nkeynes@261
   734
    } else {
nkeynes@736
   735
        if( pvr2_state.line_count >= pvr2_state.vsync_lines ) {
nkeynes@736
   736
            if( pvr2_state.line_remainder < (pvr2_state.line_time_ns - pvr2_state.back_porch_ns)) {
nkeynes@736
   737
                result |= 0x3800; /* Display active */
nkeynes@736
   738
            } else {
nkeynes@736
   739
                result |= 0x3000;
nkeynes@736
   740
            }
nkeynes@736
   741
        } else {
nkeynes@736
   742
            result |= 0x1000; /* Back porch */
nkeynes@736
   743
        }
nkeynes@261
   744
    }
nkeynes@261
   745
    return result;
nkeynes@261
   746
}
nkeynes@261
   747
nkeynes@265
   748
/**
nkeynes@265
   749
 * Schedule a "scanline" event. This actually goes off at
nkeynes@265
   750
 * 2 * line in even fields and 2 * line + 1 in odd fields.
nkeynes@265
   751
 * Otherwise this behaves as per pvr2_schedule_line_event().
nkeynes@265
   752
 * The raster position should be updated before calling this
nkeynes@265
   753
 * method.
nkeynes@304
   754
 * @param eventid Event to fire at the specified time
nkeynes@304
   755
 * @param line Line on which to fire the event (this is 2n/2n+1 for interlaced
nkeynes@304
   756
 *  displays). 
nkeynes@304
   757
 * @param hpos_ns Nanoseconds into the line at which to fire.
nkeynes@265
   758
 */
nkeynes@304
   759
static void pvr2_schedule_scanline_event( int eventid, int line, int minimum_lines, int hpos_ns )
nkeynes@265
   760
{
nkeynes@265
   761
    uint32_t field = pvr2_state.odd_even_field;
nkeynes@265
   762
    if( line <= pvr2_state.line_count && pvr2_state.interlaced ) {
nkeynes@736
   763
        field = !field;
nkeynes@265
   764
    }
nkeynes@304
   765
    if( hpos_ns > pvr2_state.line_time_ns ) {
nkeynes@736
   766
        hpos_ns = pvr2_state.line_time_ns;
nkeynes@304
   767
    }
nkeynes@265
   768
nkeynes@265
   769
    line <<= 1;
nkeynes@265
   770
    if( field ) {
nkeynes@736
   771
        line += 1;
nkeynes@265
   772
    }
nkeynes@736
   773
nkeynes@274
   774
    if( line < pvr2_state.total_lines ) {
nkeynes@736
   775
        uint32_t lines;
nkeynes@736
   776
        uint32_t time;
nkeynes@736
   777
        if( line <= pvr2_state.line_count ) {
nkeynes@736
   778
            lines = (pvr2_state.total_lines - pvr2_state.line_count + line);
nkeynes@736
   779
        } else {
nkeynes@736
   780
            lines = (line - pvr2_state.line_count);
nkeynes@736
   781
        }
nkeynes@736
   782
        if( lines <= minimum_lines ) {
nkeynes@736
   783
            lines += pvr2_state.total_lines;
nkeynes@736
   784
        }
nkeynes@736
   785
        time = (lines * pvr2_state.line_time_ns) - pvr2_state.line_remainder + hpos_ns;
nkeynes@736
   786
        event_schedule( eventid, time );
nkeynes@274
   787
    } else {
nkeynes@736
   788
        event_cancel( eventid );
nkeynes@274
   789
    }
nkeynes@265
   790
}
nkeynes@265
   791
nkeynes@1
   792
MMIO_REGION_READ_FN( PVR2, reg )
nkeynes@1
   793
{
nkeynes@1
   794
    switch( reg ) {
nkeynes@736
   795
    case DISP_SYNCSTAT:
nkeynes@736
   796
        return pvr2_get_sync_status();
nkeynes@736
   797
    default:
nkeynes@736
   798
        return MMIO_READ( PVR2, reg );
nkeynes@1
   799
    }
nkeynes@1
   800
}
nkeynes@19
   801
nkeynes@337
   802
MMIO_REGION_WRITE_FN( PVR2PAL, reg, val )
nkeynes@337
   803
{
nkeynes@337
   804
    MMIO_WRITE( PVR2PAL, reg, val );
nkeynes@337
   805
    pvr2_state.palette_changed = TRUE;
nkeynes@337
   806
}
nkeynes@337
   807
nkeynes@337
   808
void pvr2_check_palette_changed()
nkeynes@337
   809
{
nkeynes@337
   810
    if( pvr2_state.palette_changed ) {
nkeynes@736
   811
        texcache_invalidate_palette();
nkeynes@736
   812
        pvr2_state.palette_changed = FALSE;
nkeynes@337
   813
    }
nkeynes@337
   814
}
nkeynes@337
   815
nkeynes@337
   816
MMIO_REGION_READ_DEFFN( PVR2PAL );
nkeynes@85
   817
nkeynes@19
   818
void pvr2_set_base_address( uint32_t base ) 
nkeynes@19
   819
{
nkeynes@197
   820
    mmio_region_PVR2_write( DISP_ADDR1, base );
nkeynes@19
   821
}
nkeynes@56
   822
nkeynes@56
   823
nkeynes@65
   824
nkeynes@98
   825
nkeynes@56
   826
int32_t mmio_region_PVR2TA_read( uint32_t reg )
nkeynes@56
   827
{
nkeynes@56
   828
    return 0xFFFFFFFF;
nkeynes@56
   829
}
nkeynes@56
   830
nkeynes@56
   831
void mmio_region_PVR2TA_write( uint32_t reg, uint32_t val )
nkeynes@56
   832
{
nkeynes@433
   833
    pvr2_ta_write( (unsigned char *)&val, sizeof(uint32_t) );
nkeynes@56
   834
}
nkeynes@56
   835
nkeynes@352
   836
/**
nkeynes@352
   837
 * Find the render buffer corresponding to the requested output frame
nkeynes@352
   838
 * (does not consider texture renders). 
nkeynes@352
   839
 * @return the render_buffer if found, or null if no such buffer.
nkeynes@352
   840
 *
nkeynes@352
   841
 * Note: Currently does not consider "partial matches", ie partial
nkeynes@352
   842
 * frame overlap - it probably needs to do this.
nkeynes@352
   843
 */
nkeynes@352
   844
render_buffer_t pvr2_get_render_buffer( frame_buffer_t frame )
nkeynes@352
   845
{
nkeynes@352
   846
    int i;
nkeynes@352
   847
    for( i=0; i<render_buffer_count; i++ ) {
nkeynes@736
   848
        if( render_buffers[i] != NULL && render_buffers[i]->address == frame->address ) {
nkeynes@736
   849
            return render_buffers[i];
nkeynes@736
   850
        }
nkeynes@352
   851
    }
nkeynes@352
   852
    return NULL;
nkeynes@352
   853
}
nkeynes@352
   854
nkeynes@352
   855
/**
nkeynes@477
   856
 * Allocate a render buffer with the requested parameters.
nkeynes@477
   857
 * The order of preference is:
nkeynes@352
   858
 *   1. An existing buffer with the same address. (not flushed unless the new
nkeynes@352
   859
 * size is smaller than the old one).
nkeynes@352
   860
 *   2. An existing buffer with the same size chosen by LRU order. Old buffer
nkeynes@352
   861
 *       is flushed to vram.
nkeynes@352
   862
 *   3. A new buffer if one can be created.
nkeynes@352
   863
 *   4. The current display buff
nkeynes@352
   864
 * Note: The current display field(s) will never be overwritten except as a last
nkeynes@352
   865
 * resort.
nkeynes@352
   866
 */
nkeynes@477
   867
render_buffer_t pvr2_alloc_render_buffer( sh4addr_t render_addr, int width, int height )
nkeynes@352
   868
{
nkeynes@477
   869
    int i;
nkeynes@352
   870
    render_buffer_t result = NULL;
nkeynes@352
   871
nkeynes@352
   872
    /* Check existing buffers for an available buffer */
nkeynes@352
   873
    for( i=0; i<render_buffer_count; i++ ) {
nkeynes@736
   874
        if( render_buffers[i]->width == width && render_buffers[i]->height == height ) {
nkeynes@736
   875
            /* needs to be the right dimensions */
nkeynes@736
   876
            if( render_buffers[i]->address == render_addr ) {
nkeynes@736
   877
                if( displayed_render_buffer == render_buffers[i] ) {
nkeynes@736
   878
                    /* Same address, but we can't use it because the
nkeynes@736
   879
                     * display has it. Mark it as unaddressed for later.
nkeynes@736
   880
                     */
nkeynes@736
   881
                    render_buffers[i]->address = -1;
nkeynes@736
   882
                } else {
nkeynes@736
   883
                    /* perfect */
nkeynes@736
   884
                    result = render_buffers[i];
nkeynes@736
   885
                    break;
nkeynes@736
   886
                }
nkeynes@736
   887
            } else if( render_buffers[i]->address == -1 && result == NULL && 
nkeynes@736
   888
                    displayed_render_buffer != render_buffers[i] ) {
nkeynes@736
   889
                result = render_buffers[i];
nkeynes@736
   890
            }
nkeynes@736
   891
nkeynes@736
   892
        } else if( render_buffers[i]->address == render_addr ) {
nkeynes@736
   893
            /* right address, wrong size - if it's larger, flush it, otherwise 
nkeynes@736
   894
             * nuke it quietly */
nkeynes@736
   895
            if( render_buffers[i]->width * render_buffers[i]->height >
nkeynes@736
   896
            width*height ) {
nkeynes@736
   897
                pvr2_render_buffer_copy_to_sh4( render_buffers[i] );
nkeynes@736
   898
            }
nkeynes@736
   899
            render_buffers[i]->address = -1;
nkeynes@736
   900
        }
nkeynes@352
   901
    }
nkeynes@352
   902
nkeynes@352
   903
    /* Nothing available - make one */
nkeynes@352
   904
    if( result == NULL ) {
nkeynes@736
   905
        if( render_buffer_count == MAX_RENDER_BUFFERS ) {
nkeynes@736
   906
            /* maximum buffers reached - need to throw one away */
nkeynes@736
   907
            uint32_t field1_addr = MMIO_READ( PVR2, DISP_ADDR1 );
nkeynes@736
   908
            uint32_t field2_addr = MMIO_READ( PVR2, DISP_ADDR2 );
nkeynes@736
   909
            for( i=0; i<render_buffer_count; i++ ) {
nkeynes@736
   910
                if( render_buffers[i]->address != field1_addr &&
nkeynes@736
   911
                        render_buffers[i]->address != field2_addr &&
nkeynes@736
   912
                        render_buffers[i] != displayed_render_buffer ) {
nkeynes@736
   913
                    /* Never throw away the current "front buffer(s)" */
nkeynes@736
   914
                    result = render_buffers[i];
nkeynes@736
   915
                    if( !result->flushed ) {
nkeynes@736
   916
                        pvr2_render_buffer_copy_to_sh4( result );
nkeynes@736
   917
                    }
nkeynes@736
   918
                    if( result->width != width || result->height != height ) {
nkeynes@736
   919
                        display_driver->destroy_render_buffer(render_buffers[i]);
nkeynes@805
   920
                        result = display_driver->create_render_buffer(width,height,0);
nkeynes@736
   921
                        render_buffers[i] = result;
nkeynes@736
   922
                    }
nkeynes@736
   923
                    break;
nkeynes@736
   924
                }
nkeynes@736
   925
            }
nkeynes@736
   926
        } else {
nkeynes@805
   927
            result = display_driver->create_render_buffer(width,height,0);
nkeynes@736
   928
            if( result != NULL ) { 
nkeynes@736
   929
                render_buffers[render_buffer_count++] = result;
nkeynes@736
   930
            }
nkeynes@736
   931
        }
nkeynes@352
   932
    }
nkeynes@352
   933
nkeynes@477
   934
    if( result != NULL ) {
nkeynes@736
   935
        result->address = render_addr;
nkeynes@477
   936
    }
nkeynes@352
   937
    return result;
nkeynes@352
   938
}
nkeynes@352
   939
nkeynes@352
   940
/**
nkeynes@477
   941
 * Allocate a render buffer based on the current rendering settings
nkeynes@477
   942
 */
nkeynes@477
   943
render_buffer_t pvr2_next_render_buffer()
nkeynes@477
   944
{
nkeynes@477
   945
    render_buffer_t result = NULL;
nkeynes@477
   946
    uint32_t render_addr = MMIO_READ( PVR2, RENDER_ADDR1 );
nkeynes@477
   947
    uint32_t render_mode = MMIO_READ( PVR2, RENDER_MODE );
nkeynes@477
   948
    uint32_t render_scale = MMIO_READ( PVR2, RENDER_SCALER );
nkeynes@477
   949
    uint32_t render_stride = MMIO_READ( PVR2, RENDER_SIZE ) << 3;
nkeynes@477
   950
nkeynes@477
   951
    if( render_addr & 0x01000000 ) { /* vram64 */
nkeynes@736
   952
        render_addr = (render_addr & 0x00FFFFFF) + PVR2_RAM_BASE_INT;
nkeynes@477
   953
    } else { /* vram32 */
nkeynes@736
   954
        render_addr = (render_addr & 0x00FFFFFF) + PVR2_RAM_BASE;
nkeynes@477
   955
    }
nkeynes@477
   956
nkeynes@653
   957
    int width = pvr2_scene_buffer_width();
nkeynes@653
   958
    int height = pvr2_scene_buffer_height();
nkeynes@477
   959
    int colour_format = pvr2_render_colour_format[render_mode&0x07];
nkeynes@477
   960
nkeynes@477
   961
    result = pvr2_alloc_render_buffer( render_addr, width, height );
nkeynes@477
   962
    /* Setup the buffer */
nkeynes@477
   963
    if( result != NULL ) {
nkeynes@736
   964
        result->rowstride = render_stride;
nkeynes@736
   965
        result->colour_format = colour_format;
nkeynes@736
   966
        result->scale = render_scale;
nkeynes@736
   967
        result->size = width * height * colour_formats[colour_format].bpp;
nkeynes@736
   968
        result->flushed = FALSE;
nkeynes@736
   969
        result->inverted = TRUE; // render buffers are inverted normally
nkeynes@477
   970
    }
nkeynes@477
   971
    return result;
nkeynes@477
   972
}
nkeynes@477
   973
nkeynes@477
   974
static render_buffer_t pvr2_frame_buffer_to_render_buffer( frame_buffer_t frame )
nkeynes@477
   975
{
nkeynes@477
   976
    render_buffer_t result = pvr2_alloc_render_buffer( frame->address, frame->width, frame->height );
nkeynes@477
   977
    if( result != NULL ) {
nkeynes@736
   978
        int bpp = colour_formats[frame->colour_format].bpp;
nkeynes@736
   979
        result->rowstride = frame->rowstride;
nkeynes@736
   980
        result->colour_format = frame->colour_format;
nkeynes@736
   981
        result->scale = 0x400;
nkeynes@736
   982
        result->size = frame->width * frame->height * bpp;
nkeynes@736
   983
        result->flushed = TRUE;
nkeynes@736
   984
        result->inverted = frame->inverted;
nkeynes@736
   985
        display_driver->load_frame_buffer( frame, result );
nkeynes@477
   986
    }
nkeynes@477
   987
    return result;
nkeynes@477
   988
}
nkeynes@736
   989
nkeynes@477
   990
nkeynes@477
   991
/**
nkeynes@352
   992
 * Invalidate any caching on the supplied address. Specifically, if it falls
nkeynes@352
   993
 * within any of the render buffers, flush the buffer back to PVR2 ram.
nkeynes@352
   994
 */
nkeynes@352
   995
gboolean pvr2_render_buffer_invalidate( sh4addr_t address, gboolean isWrite )
nkeynes@352
   996
{
nkeynes@352
   997
    int i;
nkeynes@352
   998
    address = address & 0x1FFFFFFF;
nkeynes@352
   999
    for( i=0; i<render_buffer_count; i++ ) {
nkeynes@736
  1000
        uint32_t bufaddr = render_buffers[i]->address;
nkeynes@736
  1001
        if( bufaddr != -1 && bufaddr <= address && 
nkeynes@736
  1002
                (bufaddr + render_buffers[i]->size) > address ) {
nkeynes@736
  1003
            if( !render_buffers[i]->flushed ) {
nkeynes@736
  1004
                pvr2_render_buffer_copy_to_sh4( render_buffers[i] );
nkeynes@736
  1005
                render_buffers[i]->flushed = TRUE;
nkeynes@736
  1006
            }
nkeynes@736
  1007
            if( isWrite ) {
nkeynes@736
  1008
                render_buffers[i]->address = -1; /* Invalid */
nkeynes@736
  1009
            }
nkeynes@736
  1010
            return TRUE; /* should never have overlapping buffers */
nkeynes@736
  1011
        }
nkeynes@352
  1012
    }
nkeynes@352
  1013
    return FALSE;
nkeynes@352
  1014
}
.