nkeynes@100: /**
nkeynes@103:  * $Id: render.c,v 1.2 2006-03-13 12:39:07 nkeynes Exp $
nkeynes@100:  *
nkeynes@100:  * PVR2 Renderer support. This is where the real work happens.
nkeynes@100:  *
nkeynes@100:  * Copyright (c) 2005 Nathan Keynes.
nkeynes@100:  *
nkeynes@100:  * This program is free software; you can redistribute it and/or modify
nkeynes@100:  * it under the terms of the GNU General Public License as published by
nkeynes@100:  * the Free Software Foundation; either version 2 of the License, or
nkeynes@100:  * (at your option) any later version.
nkeynes@100:  *
nkeynes@100:  * This program is distributed in the hope that it will be useful,
nkeynes@100:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
nkeynes@100:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
nkeynes@100:  * GNU General Public License for more details.
nkeynes@100:  */
nkeynes@100: 
nkeynes@100: #include "pvr2/pvr2.h"
nkeynes@100: #include "asic.h"
nkeynes@103: 
nkeynes@103: 
nkeynes@103: #define POLY_COLOUR_ARGB8888 0x00000000
nkeynes@103: #define POLY_COLOUR_ARGBFLOAT 0x00000010
nkeynes@103: 
nkeynes@103: static int pvr2_poly_vertexes[4] = { 3, 4, 6, 8 };
nkeynes@103: static int pvr2_poly_type[4] = { GL_TRIANGLES, GL_QUADS, GL_TRIANGLE_STRIP, GL_TRIANGLE_STRIP };
nkeynes@103: static int pvr2_poly_depthmode[8] = { GL_NEVER, GL_LESS, GL_EQUAL, GL_LEQUAL,
nkeynes@103: 				      GL_GREATER, GL_NOTEQUAL, GL_GEQUAL, 
nkeynes@103: 				      GL_ALWAYS };
nkeynes@103: static int pvr2_poly_srcblend[8] = { 
nkeynes@103:     GL_ZERO, GL_ONE, GL_DST_COLOR, GL_ONE_MINUS_DST_COLOR,
nkeynes@103:     GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA, GL_DST_ALPHA, 
nkeynes@103:     GL_ONE_MINUS_DST_ALPHA };
nkeynes@103: static int pvr2_poly_dstblend[8] = {
nkeynes@103:     GL_ZERO, GL_ONE, GL_SRC_COLOR, GL_ONE_MINUS_SRC_COLOR,
nkeynes@103:     GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA, GL_DST_ALPHA,
nkeynes@103:     GL_ONE_MINUS_DST_ALPHA };
nkeynes@103: static int pvr2_render_colour_format[8] = {
nkeynes@103:     COLFMT_ARGB1555, COLFMT_RGB565, COLFMT_ARGB4444, COLFMT_ARGB1555,
nkeynes@103:     COLFMT_RGB888, COLFMT_ARGB8888, COLFMT_ARGB8888, COLFMT_ARGB4444 };
nkeynes@103: 
nkeynes@103: #define POLY_STRIP_TYPE(poly) ( pvr2_poly_type[((poly->command)>>18)&0x03] )
nkeynes@103: #define POLY_STRIP_VERTEXES(poly) ( pvr2_poly_vertexes[((poly->command)>>18)&0x03] )
nkeynes@103: #define POLY_DEPTH_MODE(poly) ( pvr2_poly_depthmode[poly->poly_cfg>>29] )
nkeynes@103: #define POLY_DEPTH_WRITE(poly) (poly->poly_cfg&0x04000000)
nkeynes@103: #define POLY_TEX_WIDTH(poly) ( 1<< (((poly->poly_mode >> 3) & 0x07 ) + 3) )
nkeynes@103: #define POLY_TEX_HEIGHT(poly) ( 1<< (((poly->poly_mode) & 0x07 ) + 3) )
nkeynes@103: #define POLY_BLEND_SRC(poly) ( pvr2_poly_srcblend[(poly->poly_mode) >> 29] )
nkeynes@103: #define POLY_BLEND_DEST(poly) ( pvr2_poly_dstblend[((poly->poly_mode)>>26)&0x07] )
nkeynes@100: 
nkeynes@100: extern uint32_t pvr2_frame_counter;
nkeynes@100: 
nkeynes@100: /**
nkeynes@103:  * Describes a rendering buffer that's actually held in GL, for when we need
nkeynes@103:  * to fetch the bits back to vram.
nkeynes@103:  */
nkeynes@103: typedef struct pvr2_render_buffer {
nkeynes@103:     uint32_t render_addr; /* The actual address rendered to in pvr ram */
nkeynes@103:     int width, height;
nkeynes@103:     int colour_format;
nkeynes@103: } *pvr2_render_buffer_t;
nkeynes@103: 
nkeynes@103: struct pvr2_render_buffer front_buffer;
nkeynes@103: struct pvr2_render_buffer back_buffer;
nkeynes@103: 
nkeynes@103: struct tile_descriptor {
nkeynes@103:     uint32_t header[6];
nkeynes@103:     struct tile_pointers {
nkeynes@103: 	uint32_t tile_id;
nkeynes@103: 	uint32_t opaque_ptr;
nkeynes@103: 	uint32_t opaque_mod_ptr;
nkeynes@103: 	uint32_t trans_ptr;
nkeynes@103: 	uint32_t trans_mod_ptr;
nkeynes@103: 	uint32_t punchout_ptr;
nkeynes@103:     } tile[0];
nkeynes@103: };
nkeynes@103: 
nkeynes@103: /* Textured polygon */
nkeynes@103: struct pvr2_poly {
nkeynes@103:     uint32_t command;
nkeynes@103:     uint32_t poly_cfg; /* Bitmask */
nkeynes@103:     uint32_t poly_mode; /* texture/blending mask */
nkeynes@103:     uint32_t texture; /* texture data */
nkeynes@103:     float alpha;
nkeynes@103:     float red;
nkeynes@103:     float green;
nkeynes@103:     float blue;
nkeynes@103: };
nkeynes@103: 
nkeynes@103: struct pvr2_specular_highlight {
nkeynes@103:     float base_alpha;
nkeynes@103:     float base_red;
nkeynes@103:     float base_green;
nkeynes@103:     float base_blue;
nkeynes@103:     float offset_alpha;
nkeynes@103:     float offset_red;
nkeynes@103:     float offset_green;
nkeynes@103:     float offset_blue;
nkeynes@103: };
nkeynes@103: 				     
nkeynes@103: 
nkeynes@103: struct pvr2_vertex_basic {
nkeynes@103:     uint32_t command;
nkeynes@103:     float x, y, z;
nkeynes@103:     float s,t;
nkeynes@103:     uint32_t col;
nkeynes@103:     float f;
nkeynes@103: };
nkeynes@103: 
nkeynes@103: 
nkeynes@103: void pvr2_render_copy_to_sh4( pvr2_render_buffer_t buffer, 
nkeynes@103: 			      gboolean backBuffer );
nkeynes@103: 
nkeynes@103: 
nkeynes@103: gboolean pvr2_render_init( void )
nkeynes@103: {
nkeynes@103:     front_buffer.render_addr = -1;
nkeynes@103:     back_buffer.render_addr = -1;
nkeynes@103: }
nkeynes@103: 
nkeynes@103: /**
nkeynes@103:  * Display a rendered frame if one is available.
nkeynes@103:  * @param address An address in PVR ram (0500000 range).
nkeynes@103:  * @return TRUE if a frame was available to be displayed, otherwise false.
nkeynes@103:  */
nkeynes@103: gboolean pvr2_render_display_frame( uint32_t address )
nkeynes@103: {
nkeynes@103:     if( front_buffer.render_addr == address ) {
nkeynes@103: 	/* Current front buffer is already displayed, so do nothing
nkeynes@103: 	 * and tell the caller that all is well.
nkeynes@103: 	 */
nkeynes@103: 	return TRUE;
nkeynes@103:     }
nkeynes@103:     if( back_buffer.render_addr == address ) {
nkeynes@103: 	/* The more useful case - back buffer is to be displayed. Swap
nkeynes@103: 	 * the buffers 
nkeynes@103: 	 */
nkeynes@103: 	video_driver->display_back_buffer();
nkeynes@103: 	front_buffer = back_buffer;
nkeynes@103: 	back_buffer.render_addr = -1;
nkeynes@103: 	return TRUE;
nkeynes@103:     }
nkeynes@103:     return FALSE;
nkeynes@103: }
nkeynes@103: 
nkeynes@103: /**
nkeynes@103:  * Prepare the OpenGL context to receive instructions for a new frame.
nkeynes@103:  */
nkeynes@103: static void pvr2_render_prepare_context( sh4addr_t render_addr, 
nkeynes@103: 					 uint32_t width, uint32_t height,
nkeynes@103: 					 uint32_t colour_format, 
nkeynes@103: 					 gboolean texture_target )
nkeynes@103: {
nkeynes@103:     /* Select and initialize the render context */
nkeynes@103:     video_driver->set_render_format( width, height, colour_format, texture_target );
nkeynes@103: 
nkeynes@103:     if( back_buffer.render_addr != -1 && 
nkeynes@103: 	back_buffer.render_addr != render_addr ) {
nkeynes@103: 	/* There's a current back buffer, and we're rendering somewhere else -
nkeynes@103: 	 * flush the back buffer back to vram and start a new back buffer
nkeynes@103: 	 */
nkeynes@103: 	pvr2_render_copy_to_sh4( &back_buffer, TRUE );
nkeynes@103:     }
nkeynes@103: 
nkeynes@103:     if( front_buffer.render_addr == render_addr ) {
nkeynes@103: 	/* In case we've been asked to render to the current front buffer -
nkeynes@103: 	 * invalidate the front buffer and render to the back buffer, ensuring
nkeynes@103: 	 * we swap at the next frame display.
nkeynes@103: 	 */
nkeynes@103: 	front_buffer.render_addr = -1;
nkeynes@103:     }
nkeynes@103:     back_buffer.render_addr = render_addr;
nkeynes@103:     back_buffer.width = width;
nkeynes@103:     back_buffer.height = height;
nkeynes@103:     back_buffer.colour_format = colour_format;
nkeynes@103: 
nkeynes@103:     /* Setup the display model */
nkeynes@103:     glDrawBuffer(GL_BACK);
nkeynes@103:     glShadeModel(GL_SMOOTH);
nkeynes@103:     glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);
nkeynes@103:     glViewport( 0, 0, width, height );
nkeynes@103:     glMatrixMode(GL_PROJECTION);
nkeynes@103:     glLoadIdentity();
nkeynes@103:     glOrtho( 0, width, height, 0, 0, 65535 );
nkeynes@103:     glMatrixMode(GL_MODELVIEW);
nkeynes@103:     glLoadIdentity();
nkeynes@103: 
nkeynes@103:     /* Clear out the buffers */
nkeynes@103:     glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
nkeynes@103:     glClearDepth(1.0f);
nkeynes@103:     glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
nkeynes@103: }
nkeynes@103: 
nkeynes@103: static void pvr2_render_display_list( uint32_t *display_list, uint32_t length )
nkeynes@103: {
nkeynes@103:     uint32_t *cmd_ptr = display_list;
nkeynes@103:     int expect_vertexes = 0;
nkeynes@103:     gboolean textured = FALSE;
nkeynes@103:     struct pvr2_poly *poly;
nkeynes@103:     while( cmd_ptr < display_list+length ) {
nkeynes@103: 	switch( *cmd_ptr >> 24 ) {
nkeynes@103: 	case PVR2_CMD_POLY_OPAQUE:
nkeynes@103: 	    poly = (struct pvr2_poly *)cmd_ptr;
nkeynes@103: 	    
nkeynes@103: 	    if( poly->command & PVR2_POLY_TEXTURED ) {
nkeynes@103: 		uint32_t addr = PVR2_TEX_ADDR(poly->texture);
nkeynes@103: 		int width = POLY_TEX_WIDTH(poly);
nkeynes@103: 		int height = POLY_TEX_HEIGHT(poly);
nkeynes@103: 		texcache_get_texture( addr, width, height, poly->texture );
nkeynes@103: 		textured = TRUE;
nkeynes@103: 		glEnable( GL_TEXTURE_2D );
nkeynes@103: 	    } else {
nkeynes@103: 		textured = FALSE;
nkeynes@103: 		glDisable( GL_TEXTURE_2D );
nkeynes@103: 	    }
nkeynes@103: 	    glBlendFunc( POLY_BLEND_SRC(poly), POLY_BLEND_DEST(poly) );
nkeynes@103: 	    if( poly->command & PVR2_POLY_SPECULAR ) {
nkeynes@103: 		/* Second block expected */
nkeynes@103: 	    }
nkeynes@103: 	    if( POLY_DEPTH_WRITE(poly) ) {
nkeynes@103: 		glEnable( GL_DEPTH_TEST );
nkeynes@103: 		glDepthFunc( POLY_DEPTH_MODE(poly) );
nkeynes@103: 	    } else {
nkeynes@103: 		glDisable( GL_DEPTH_TEST );
nkeynes@103: 	    }
nkeynes@103: 
nkeynes@103: 	    expect_vertexes = POLY_STRIP_VERTEXES( poly );
nkeynes@103: 	    if( expect_vertexes == 3 )
nkeynes@103: 		glBegin( GL_TRIANGLES );
nkeynes@103: 	    else if( expect_vertexes == 4 )
nkeynes@103: 		glBegin( GL_QUADS );
nkeynes@103: 	    else 
nkeynes@103: 		glBegin( GL_TRIANGLE_STRIP );
nkeynes@103: 	    break;
nkeynes@103: 	case PVR2_CMD_VERTEX_LAST:
nkeynes@103: 	case PVR2_CMD_VERTEX:
nkeynes@103: 	    if( expect_vertexes == 0 ) {
nkeynes@103: 		ERROR( "Unexpected vertex!" );
nkeynes@103: 		return;
nkeynes@103: 	    }
nkeynes@103: 	    expect_vertexes--;
nkeynes@103: 	    struct pvr2_vertex_basic *vertex = (struct pvr2_vertex_basic *)cmd_ptr;
nkeynes@103: 	    if( textured ) {
nkeynes@103: 		glTexCoord2f( vertex->s, vertex->t );
nkeynes@103: 	    }
nkeynes@103: 	    glVertex3f( vertex->x, vertex->y, vertex->z );
nkeynes@103: 	    
nkeynes@103: 	    if( expect_vertexes == 0 )
nkeynes@103: 		glEnd();
nkeynes@103: 	    break;
nkeynes@103: 	}
nkeynes@103: 	cmd_ptr += 8; /* Next record */
nkeynes@103:     }
nkeynes@103: }
nkeynes@103: 
nkeynes@103: /**
nkeynes@103:  * Render a complete scene into the OpenGL back buffer.
nkeynes@103:  * Note: this will probably need to be broken up eventually once timings are
nkeynes@100:  * determined.
nkeynes@100:  */
nkeynes@103: void pvr2_render_scene( )
nkeynes@100: {
nkeynes@103:     struct tile_descriptor *tile_desc =
nkeynes@103: 	(struct tile_descriptor *)mem_get_region(PVR2_RAM_BASE + MMIO_READ( PVR2, TILEBASE ));
nkeynes@100: 
nkeynes@103:     uint32_t render_addr = MMIO_READ( PVR2, RENDADDR1 );
nkeynes@103:     gboolean render_to_tex;
nkeynes@103:     if( render_addr & 0x01000000 ) {
nkeynes@103: 	render_addr = (render_addr & 0x00FFFFFF) + PVR2_RAM_BASE_INT;
nkeynes@103: 	/* Heuristic - if we're rendering to the interlaced region we're
nkeynes@103: 	 * probably creating a texture rather than rendering actual output.
nkeynes@103: 	 * We can optimise for this case a little
nkeynes@103: 	 */
nkeynes@103: 	render_to_tex = TRUE;
nkeynes@103:     } else {
nkeynes@103: 	render_addr = (render_addr & 0x00FFFFFF) + PVR2_RAM_BASE;
nkeynes@103: 	render_to_tex = FALSE;
nkeynes@103:     }
nkeynes@103:     uint32_t render_mode = MMIO_READ( PVR2, RENDMODE );
nkeynes@103:     int width = 640; /* FIXME - get this from the tile buffer */
nkeynes@103:     int height = 480;
nkeynes@103:     int colour_format = pvr2_render_colour_format[render_mode&0x07];
nkeynes@103:     pvr2_render_prepare_context( render_addr, width, height, colour_format, 
nkeynes@103: 				 render_to_tex );
nkeynes@103: 
nkeynes@103:     uint32_t *display_list = 
nkeynes@103: 	(uint32_t *)mem_get_region(PVR2_RAM_BASE + MMIO_READ( PVR2, OBJBASE ));
nkeynes@103:     uint32_t display_length = *display_list++;
nkeynes@103: 
nkeynes@103:     int clip_x = MMIO_READ( PVR2, HCLIP ) & 0x03FF;
nkeynes@103:     int clip_y = MMIO_READ( PVR2, VCLIP ) & 0x03FF;
nkeynes@103:     int clip_width = ((MMIO_READ( PVR2, HCLIP ) >> 16) & 0x03FF) - clip_x + 1;
nkeynes@103:     int clip_height= ((MMIO_READ( PVR2, VCLIP ) >> 16) & 0x03FF) - clip_y + 1;
nkeynes@103: 
nkeynes@103:     if( clip_x == 0 && clip_y == 0 && clip_width == width && clip_height == height ) {
nkeynes@103: 	glDisable( GL_SCISSOR_TEST );
nkeynes@103:     } else {
nkeynes@103: 	glEnable( GL_SCISSOR_TEST );
nkeynes@103: 	glScissor( clip_x, clip_y, clip_width, clip_height );
nkeynes@103:     }
nkeynes@103: 
nkeynes@103:     /* Fog setup goes here */
nkeynes@103: 
nkeynes@103:     /* Render the display list */
nkeynes@103:     pvr2_render_display_list( display_list, display_length );
nkeynes@103: 
nkeynes@103:     /* Post-render cleanup and update */
nkeynes@103: 
nkeynes@103:     
nkeynes@103:     /* Generate end of render event */
nkeynes@100:     asic_event( EVENT_PVR_RENDER_DONE );
nkeynes@100:     DEBUG( "Rendered frame %d", pvr2_frame_counter );
nkeynes@100: }
nkeynes@103: 
nkeynes@103: 
nkeynes@103: /**
nkeynes@103:  * Flush the indicated render buffer back to PVR. Caller is responsible for
nkeynes@103:  * tracking whether there is actually anything in the buffer.
nkeynes@103:  *
nkeynes@103:  * @param buffer A render buffer indicating the address to store to, and the
nkeynes@103:  * format the data needs to be in.
nkeynes@103:  * @param backBuffer TRUE to flush the back buffer, FALSE for 
nkeynes@103:  * the front buffer.
nkeynes@103:  */
nkeynes@103: void pvr2_render_copy_to_sh4( pvr2_render_buffer_t buffer, 
nkeynes@103: 			      gboolean backBuffer )
nkeynes@103: {
nkeynes@103:     if( buffer->render_addr == -1 )
nkeynes@103: 	return;
nkeynes@103:     GLenum type, format = GL_RGBA;
nkeynes@103:     int size = buffer->width * buffer->height;
nkeynes@103: 
nkeynes@103:     switch( buffer->colour_format ) {
nkeynes@103:     case COLFMT_RGB565: 
nkeynes@103: 	type = GL_UNSIGNED_SHORT_5_6_5; 
nkeynes@103: 	format = GL_RGB; 
nkeynes@103: 	size <<= 1;
nkeynes@103: 	break;
nkeynes@103:     case COLFMT_RGB888: 
nkeynes@103: 	type = GL_UNSIGNED_INT; 
nkeynes@103: 	format = GL_RGB;
nkeynes@103: 	size = (size<<1)+size;
nkeynes@103: 	break;
nkeynes@103:     case COLFMT_ARGB1555: 
nkeynes@103: 	type = GL_UNSIGNED_SHORT_5_5_5_1; 
nkeynes@103: 	size <<= 1;
nkeynes@103: 	break;
nkeynes@103:     case COLFMT_ARGB4444: 
nkeynes@103: 	type = GL_UNSIGNED_SHORT_4_4_4_4; 
nkeynes@103: 	size <<= 1;
nkeynes@103: 	break;
nkeynes@103:     case COLFMT_ARGB8888: 
nkeynes@103: 	type = GL_UNSIGNED_INT_8_8_8_8; 
nkeynes@103: 	size <<= 2;
nkeynes@103: 	break;
nkeynes@103:     }
nkeynes@103:     
nkeynes@103:     if( backBuffer ) {
nkeynes@103: 	glFinish();
nkeynes@103: 	glReadBuffer( GL_BACK );
nkeynes@103:     } else {
nkeynes@103: 	glReadBuffer( GL_FRONT );
nkeynes@103:     }
nkeynes@103: 
nkeynes@103:     if( buffer->render_addr & 0xFF000000 == 0x04000000 ) {
nkeynes@103: 	/* Interlaced buffer. Go the double copy... :( */
nkeynes@103: 	char target[size];
nkeynes@103: 	glReadPixels( 0, 0, buffer->width, buffer->height, format, type, target );
nkeynes@103: 	pvr2_vram64_write( buffer->render_addr, target, size );
nkeynes@103:     } else {
nkeynes@103: 	/* Regular buffer - go direct */
nkeynes@103: 	char *target = mem_get_region( buffer->render_addr );
nkeynes@103: 	glReadPixels( 0, 0, buffer->width, buffer->height, format, type, target );
nkeynes@103:     }
nkeynes@103: }
nkeynes@103: 
nkeynes@103: 
nkeynes@103: /**
nkeynes@103:  * Copy data from PVR ram into the GL render buffer. 
nkeynes@103:  *
nkeynes@103:  * @param buffer A render buffer indicating the address to read from, and the
nkeynes@103:  * format the data is in.
nkeynes@103:  * @param backBuffer TRUE to write the back buffer, FALSE for 
nkeynes@103:  * the front buffer.
nkeynes@103:  */
nkeynes@103: void pvr2_render_copy_from_sh4( pvr2_render_buffer_t buffer, 
nkeynes@103: 				gboolean backBuffer )
nkeynes@103: {
nkeynes@103:     if( buffer->render_addr == -1 )
nkeynes@103: 	return;
nkeynes@103:     GLenum type, format = GL_RGBA;
nkeynes@103:     int size = buffer->width * buffer->height;
nkeynes@103: 
nkeynes@103:     switch( buffer->colour_format ) {
nkeynes@103:     case COLFMT_RGB565: 
nkeynes@103: 	type = GL_UNSIGNED_SHORT_5_6_5; 
nkeynes@103: 	format = GL_RGB; 
nkeynes@103: 	size <<= 1;
nkeynes@103: 	break;
nkeynes@103:     case COLFMT_RGB888: 
nkeynes@103: 	type = GL_UNSIGNED_INT; 
nkeynes@103: 	format = GL_RGB;
nkeynes@103: 	size = (size<<1)+size;
nkeynes@103: 	break;
nkeynes@103:     case COLFMT_ARGB1555: 
nkeynes@103: 	type = GL_UNSIGNED_SHORT_5_5_5_1; 
nkeynes@103: 	size <<= 1;
nkeynes@103: 	break;
nkeynes@103:     case COLFMT_ARGB4444: 
nkeynes@103: 	type = GL_UNSIGNED_SHORT_4_4_4_4; 
nkeynes@103: 	size <<= 1;
nkeynes@103: 	break;
nkeynes@103:     case COLFMT_ARGB8888: 
nkeynes@103: 	type = GL_UNSIGNED_INT_8_8_8_8; 
nkeynes@103: 	size <<= 2;
nkeynes@103: 	break;
nkeynes@103:     }
nkeynes@103:     
nkeynes@103:     if( backBuffer ) {
nkeynes@103: 	glDrawBuffer( GL_BACK );
nkeynes@103:     } else {
nkeynes@103: 	glDrawBuffer( GL_FRONT );
nkeynes@103:     }
nkeynes@103: 
nkeynes@103:     glRasterPos2i( 0, 0 );
nkeynes@103:     if( buffer->render_addr & 0xFF000000 == 0x04000000 ) {
nkeynes@103: 	/* Interlaced buffer. Go the double copy... :( */
nkeynes@103: 	char target[size];
nkeynes@103: 	pvr2_vram64_read( target, buffer->render_addr, size );
nkeynes@103: 	glDrawPixels( buffer->width, buffer->height, 
nkeynes@103: 		      format, type, target );
nkeynes@103:     } else {
nkeynes@103: 	/* Regular buffer - go direct */
nkeynes@103: 	char *target = mem_get_region( buffer->render_addr );
nkeynes@103: 	glDrawPixels( buffer->width, buffer->height, 
nkeynes@103: 		      format, type, target );
nkeynes@103:     }
nkeynes@103: }