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mpv/libvo/vo_svga.c
Uoti Urpala 6d534cd3cb vidix: drop VIDIX support 
By now VIDIX is too obscure to justify the amount of code and
complexity it requires in the sources. Although there is no pressing
need to drop it just now from a code point of view, I'll rather remove
it before release than release with VIDIX support and then drop it
later.

Some of the manpage mentions of VIDIX were in "this option supported
for these VOs" lists that looked outdated and failed to mention vdpau
for example. Replace such incorrect lists with a generic "not
supported for all VOs" mention.
2011-01-31 16:03:10 +02:00

671 lines
22 KiB
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/*
* video driver for SVGAlib
* by Zoltan Mark Vician <se7en@sch.bme.hu>
* Code started: Mon Apr 1 23:25:47 2001
* Some changes by Matan Ziv-Av <matan@svgalib.org>
* complete rewrite by Ivan Kalvachev 19 Mar 2003
*
* This file is part of MPlayer.
*
* MPlayer is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* MPlayer is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with MPlayer; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
/*
Wrangings:
- 1bpp doesn't work right for me with '-double' and svgalib 1.4.3,
but works OK with svgalib 1.9.17
- The HW acceleration is not tested - svgalibs supports few chipsets,
and i don't have any of them. If it works for you then let me know.
I will remove this warning after confirm its status.
- retrace sync works only in doublebuffer mode.
- the retrace sync may slow down decoding a lot - mplayer is blocked while
waiting for retrace
- denoise3d fails to find common colorspace, use -vf denoise3d,scale
TODO:
- let choose_best_mode take aspect into account
- set palette from mpi->palette or mpi->plane[1]
- make faster OSD black bars clear - need some OSD changes
- Make nicer CONFIG parsing
- change video mode logical width to match img->stride[0] - for HW only
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <vga.h>
#include <limits.h>
#include "config.h"
#include "video_out.h"
#include "video_out_internal.h"
#include "fastmemcpy.h"
#include "osdep/getch2.h"
#include "sub/sub.h"
#include "mp_msg.h"
//#include "mp_image.h"
#include <assert.h>
static void draw_alpha(int x0, int y0, int w, int h, unsigned char *src,
unsigned char *srca, int stride);
static uint32_t get_image(mp_image_t *mpi);
#define MAXPAGES 16
#define PAGE_EMPTY 0
#define PAGE_BUSY 1
#define CAP_ACCEL_CLEAR 8
#define CAP_ACCEL_PUTIMAGE 4
#define CAP_ACCEL_BACKGR 2
#define CAP_LINEAR 1
static uint8_t zerobuf[8192];//used when clear screen with vga_draw
static int squarepix;
static int force_vm=0;
static int force_native=0;
static int sync_flip=0;
static int blackbar_osd=0;
static int cpage,max_pages,old_page;
static vga_modeinfo * modeinfo;
static int mode_stride; //keep it in case of vga_setlogicalwidth
static int stride_granularity; //not yet used
static int mode_bpp;
static int mode_capabilities;
static int image_width,image_height; // used by OSD
static int x_pos, y_pos;
static struct {
int yoffset;//y position of the page
int doffset;//display start of the page
uint8_t * vbase;//memory start address of the page
int locks;
}PageStore[MAXPAGES];
static const vo_info_t info = {
"SVGAlib",
"svga",
"Ivan Kalvachev <iive@users.sf.net>",
""
};
LIBVO_EXTERN(svga)
//return number of 1'st free page or -1 if no free one
static inline int page_find_free(void){
int i;
for(i=0;i<max_pages;i++)
if(PageStore[i].locks == PAGE_EMPTY) return i;
return -1;
}
static int preinit(const char *arg)
{
int i,rez;
char s[64];
getch2_disable();
memset(zerobuf,0,sizeof(zerobuf));
force_vm=force_native=squarepix=0;
sync_flip=vo_vsync;
blackbar_osd=0;
if(arg)while(*arg) {
if(!strncmp(arg,"sq",2)) {
squarepix=1;
arg+=2;
if( *arg == ':' ) arg++;
}
if(!strncmp(arg,"native",6)) {
force_native=1;
arg+=6;
if( *arg == ':' ) arg++;
}
if(!strncmp(arg,"bbosd",5)) {
blackbar_osd=1;
arg+=5;
if( *arg == ':' ) arg++;
}
if(!strncmp(arg,"retrace",7)) {
sync_flip=1;
arg+=7;
if( *arg == ':' ) arg++;
}
if(*arg) {
i=0;
while(arg[i] && arg[i]!=':')i++;
if(i<64){
strncpy(s, arg, i);
s[i]=0;
force_vm=vga_getmodenumber(s);
if(force_vm>0) {
mp_msg(MSGT_VO,MSGL_V, "vo_svga: Forcing mode %i\n",force_vm);
}else{
force_vm = 0;
}
}
arg+=i;
if(*arg==':')arg++;
}
}
rez = vga_init();
if(rez != 0){
mp_msg(MSGT_VO,MSGL_ERR, "vo_svga: vga_init() returned error=%d\n",rez);
}
return !!rez;
}
static void svga_clear_box(int x,int y,int w,int h){
uint8_t * rgbplane;
int i;
if (mode_capabilities&CAP_ACCEL_CLEAR){
mp_msg(MSGT_VO,MSGL_DBG3, "vo_svga: clearing box %d,%d - %d,%d with HW acceleration\n",
x,y,w,h);
if(mode_capabilities&CAP_ACCEL_BACKGR)
vga_accel(ACCEL_SYNC);
vga_accel(ACCEL_SETFGCOLOR,0);//black
vga_accel(ACCEL_FILLBOX,x,y,w,h);
return;
}
if (mode_capabilities & CAP_LINEAR){
mp_msg(MSGT_VO,MSGL_DBG3, "vo_svga: clearing box %d,%d - %d,%d with memset\n",x,y,w,h);
rgbplane=PageStore[0].vbase + (y*mode_stride) + (x*modeinfo->bytesperpixel);
for(i=0;i<h;i++){
//i'm afraid that memcpy is better optimized than memset;)
fast_memcpy(rgbplane,zerobuf,w*modeinfo->bytesperpixel);
// memset(rgbplane,0,w*modeinfo->bytesperpixel);
rgbplane+=mode_stride;
}
return;
}
//native
mp_msg(MSGT_VO,MSGL_DBG3, "vo_svga: clearing box %d,%d - %d,%d with native draw \n",x,y,w,h);
if(modeinfo->bytesperpixel!=0) w*=modeinfo->bytesperpixel;
for(i=0;i<h;i++){
vga_drawscansegment(zerobuf,x,y+i,w);
}
};
static uint32_t svga_draw_image(mp_image_t *mpi){
int i,x,y,w,h;
int stride;
uint8_t *rgbplane, *base;
int bytesperline;
int page;
if(mpi->flags & MP_IMGFLAG_DIRECT){
mp_msg(MSGT_VO,MSGL_DBG3, "vo_svga: drawing direct rendered surface\n");
cpage=(uint32_t)mpi->priv;
assert((cpage>=0)&&(cpage<max_pages));
return VO_TRUE; //it's already done
}
// if (mpi->flags&MP_IMGFLAGS_DRAWBACK)
// return VO_TRUE;//direct render method 2
//find a free page to draw into
//if there is no one then use the current one
page = page_find_free();
if(page>=0) cpage=page;
PageStore[cpage].locks=PAGE_BUSY;
// these variables are used in loops
x = mpi->x;
y = mpi->y;
w = mpi->w;
h = mpi->h;
stride = mpi->stride[0];
rgbplane = mpi->planes[0] + y*stride + (x*mpi->bpp)/8;
x+=x_pos;//center
y+=y_pos;
if(mpi->bpp >= 8){//for modes<8 use only native
if( (mode_capabilities&CAP_ACCEL_PUTIMAGE) && (x==0) && (w==mpi->width) &&
(stride == mode_stride) ){ //only monolite image can be accelerated
w=(stride*8)/mpi->bpp;//we transfer pixels in the stride so the source
//ACCELERATE
mp_msg(MSGT_VO,MSGL_DBG3, "vo_svga: using HW PutImage (x=%d,y=%d,w=%d,h=%d)\n",x,y,w,h);
if(mode_capabilities & CAP_ACCEL_BACKGR)
vga_accel(ACCEL_SYNC);
vga_accel(ACCEL_PUTIMAGE,x,y+PageStore[cpage].yoffset,w,h,rgbplane);
return VO_TRUE;
}
if( mode_capabilities&CAP_LINEAR){
//DIRECT
mp_msg(MSGT_VO,MSGL_DBG3, "vo_svga: using Direct memcpy (x=%d,y=%d,w=%d,h=%d)\n",x,y,w,h);
bytesperline=(w*mpi->bpp)/8;
base=PageStore[cpage].vbase + (y*mode_stride) + (x*mpi->bpp)/8;
for(i=0;i<h;i++){
mem2agpcpy(base,rgbplane,bytesperline);
base+=mode_stride;
rgbplane+=stride;
}
return VO_TRUE;
}
}//(modebpp>=8
//NATIVE
{
int length;
length=(w*mpi->bpp)/8;
//one byte per pixel! svgalib innovation
if(mpi->imgfmt==IMGFMT_RG4B || mpi->imgfmt==IMGFMT_BG4B) length=w;
mp_msg(MSGT_VO,MSGL_DBG3, "vo_svga: using Native vga_draw(x=%d,y=%d,w=%d,h=%d)\n",x,y,w,h);
y+=PageStore[cpage].yoffset;//y position of the page beggining
for(i=0;i<h;i++){
vga_drawscansegment(rgbplane,x,y+i,length);
rgbplane+=stride;
}
}
return VO_TRUE;
}
static int bpp_from_vminfo(vga_modeinfo *vminfo){
switch(vminfo->colors){
case 2: return 1;
case 16: return 4;
case 256: return 8;
case 32768: return 15;
case 65536: return 16;
case 1<<24: return 8*vminfo->bytesperpixel;
}
return 0;
}
static int find_best_svga_mode(int req_w,int req_h, int req_bpp){
int badness,prev_badness;
int bestmode,lastmode;
int i;
vga_modeinfo *vminfo;
//int best aspect mode // best linear mode // best normal mode (no modeX)
prev_badness = 0;//take care of special case below
bestmode = 0; //0 is the TEXT mode
lastmode = vga_lastmodenumber();
for(i=1;i<=lastmode;i++){
vminfo = vga_getmodeinfo(i);
if( vminfo == NULL ) continue;
mp_msg(MSGT_VO,MSGL_DBG4, "vo_svga: testing mode %d (%s)\n",i,vga_getmodename(i));
if( vga_hasmode(i) == 0 ) continue;
if( req_bpp != bpp_from_vminfo(vminfo) )continue;
if( (vminfo->width < req_w) || (vminfo->height < req_h) ) continue;
badness=(vminfo->width * vminfo->height) - (req_h * req_w);
//put here aspect calculations
if(squarepix)
if( vminfo->width*3 != vminfo->height*4 ) continue;
if( bestmode==0 || prev_badness >= badness ){//modeX etc...
prev_badness=badness;
bestmode=i;
mp_msg(MSGT_VO,MSGL_DBG4, "vo_svga: found good mode %d with badness %d\n",i,badness);
}
}
return bestmode;
}
static int control(uint32_t request, void *data)
{
switch (request) {
case VOCTRL_QUERY_FORMAT:
return query_format(*((uint32_t*)data));
case VOCTRL_DRAW_IMAGE:
return svga_draw_image( (mp_image_t *)data);
case VOCTRL_GET_IMAGE:
return get_image(data);
}
return VO_NOTIMPL;
}
//
// This function is called to init the video driver for specific mode
//
static int config(uint32_t width, uint32_t height, uint32_t d_width,
uint32_t d_height, uint32_t flags, char *title,
uint32_t format) {
int32_t req_w = width;// (d_width > 0 ? d_width : width);
int32_t req_h = height;// (d_height > 0 ? d_height : height);
uint16_t vid_mode = 0;
int32_t req_bpp;
uint32_t accflags;
mp_msg(MSGT_VO,MSGL_V, "vo_svga: config(%i, %i, %i, %i, %08x, %s, %08x)\n", width, height,
d_width, d_height, flags, title, format);
//Only RGB modes supported
if (!IMGFMT_IS_RGB(format) && !IMGFMT_IS_BGR(format)) {assert(0);return -1;}
req_bpp = IMGFMT_BGR_DEPTH(format);
if( vo_dbpp!=0 && vo_dbpp!=req_bpp) {assert(0);return-1;}
if(!force_vm) {
mp_msg(MSGT_VO,MSGL_V, "vo_svga: Looking for the best resolution...\n");
mp_msg(MSGT_VO,MSGL_V, "vo_svga: req_w: %d, req_h: %d, bpp: %d\n",req_w,req_h,req_bpp);
vid_mode=find_best_svga_mode(req_w,req_h,req_bpp);
if(vid_mode==0)
return 1;
modeinfo=vga_getmodeinfo(vid_mode);
}else{//force_vm
vid_mode=force_vm;
if(vga_hasmode(vid_mode) == 0){
mp_tmsg(MSGT_VO,MSGL_ERR, "[VO_SVGA] Forced vid_mode %d (%s) not available.\n",
vid_mode,vga_getmodename(vid_mode));
return 1; //error;
}
modeinfo=vga_getmodeinfo(vid_mode);
if( (modeinfo->width < req_w) || (modeinfo->height < req_h) ){
mp_tmsg(MSGT_VO,MSGL_ERR, "[VO_SVGA] Forced vid_mode %d (%s) too small.\n",
vid_mode,vga_getmodename(vid_mode));
return 1;
}
}
mode_bpp=bpp_from_vminfo(modeinfo);
mp_tmsg(MSGT_VO,MSGL_INFO, "[VO_SVGA] Vid_mode: %d, %dx%d %dbpp.\n",
vid_mode,modeinfo->width,modeinfo->height,mode_bpp);
if (vga_setmode(vid_mode) == -1) {
mp_tmsg(MSGT_VO,MSGL_ERR, "[VO_SVGA] Vga_setmode(%d) failed.\n",vid_mode);
uninit();
return 1; // error
}
/* set 332 palette for 8 bpp */
if(mode_bpp==8){
int i;
for(i=0; i<256; i++)
vga_setpalette(i, ((i>>5)&7)*9, ((i>>2)&7)*9, (i&3)*21);
}
/* set 121 palette for 4 bpp */
else if(mode_bpp==4){
int i;
for(i=0; i<16; i++)
vga_setpalette(i, ((i>>3)&1)*63, ((i>>1)&3)*21, (i&1)*63);
}
//if we change the logical width, we should know the granularity
stride_granularity=8;//according to man vga_logicalwidth
if(modeinfo->flags & EXT_INFO_AVAILABLE){
stride_granularity=modeinfo->linewidth_unit;
}
//look for hardware acceleration
mode_capabilities=0;//NATIVE;
if(!force_native){//if we want to use only native drawers
if(modeinfo->flags & HAVE_EXT_SET){//support for hwaccel interface
accflags=vga_ext_set(VGA_EXT_AVAILABLE,VGA_AVAIL_ACCEL);
if(accflags & ACCELFLAG_FILLBOX) // clear screen
mode_capabilities|=CAP_ACCEL_CLEAR;
if(accflags & ACCELFLAG_PUTIMAGE)//support for mem->vid transfer
mode_capabilities|=CAP_ACCEL_PUTIMAGE;
if((accflags & ACCELFLAG_SETMODE) && (accflags & ACCELFLAG_SYNC)){
vga_accel(ACCEL_SETMODE,BLITS_IN_BACKGROUND);
mode_capabilities|=CAP_ACCEL_BACKGR;//can draw in backgraund
}
}
if(modeinfo->flags & IS_LINEAR){
mode_capabilities|=CAP_LINEAR; //don't use bank & vga_draw
}
else{
if(modeinfo->flags & CAPABLE_LINEAR){
int vid_mem_size;
vid_mem_size = vga_setlinearaddressing();
if(vid_mem_size != -1){
modeinfo=vga_getmodeinfo(vid_mode);//sometimes they change parameters
mode_capabilities|=CAP_LINEAR;
}
}
}
}//fi force native
if(mode_capabilities&CAP_LINEAR){
mp_tmsg(MSGT_VO,MSGL_INFO, "[VO_SVGA] Video mode is linear and memcpy could be used for image transfer.\n");
}
if(mode_capabilities&CAP_ACCEL_PUTIMAGE){
mp_tmsg(MSGT_VO,MSGL_INFO, "[VO_SVGA] Video mode has hardware acceleration and put_image could be used.\n");
mp_tmsg(MSGT_VO,MSGL_INFO, "[VO_SVGA] If it works for you I would like to know.\n[VO_SVGA] (send log with `mplayer test.avi -v -v -v -v &> svga.log`). Thx!\n");
}
//here is the place to handle strides for accel_ modes;
mode_stride=modeinfo->linewidth;
//we may try to set a bigger stride for video mode that will match the mpi->stride,
//this way we will transfer more data, but HW put_image can do it in backgraund!
//now let's see how many pages we can use
max_pages = modeinfo->maxpixels/(modeinfo->height * modeinfo->width);
if(max_pages > MAXPAGES) max_pages = MAXPAGES;
if(!vo_doublebuffering) max_pages=1;
//fill PageStore structs
{
int i;
uint8_t * GRAPH_MEM;
int dof;
GRAPH_MEM=vga_getgraphmem();
for(i=0;i<max_pages;i++){
//calculate display offset
dof = i * modeinfo->height * modeinfo->width;
if(modeinfo->bytesperpixel != 0) dof*=modeinfo->bytesperpixel;
//check video chip limitations
if( dof != (dof & modeinfo->startaddressrange) ){
max_pages=i;//page 0 will never come here
break;
}
PageStore[i].yoffset = i * modeinfo->height;//starting y offset
PageStore[i].vbase = GRAPH_MEM + i*modeinfo->height*mode_stride; //memory base address
PageStore[i].doffset = dof; //display offset
PageStore[i].locks = PAGE_EMPTY;
}
}
assert(max_pages>0);
mp_tmsg(MSGT_VO,MSGL_INFO, "[VO_SVGA] Video mode has %d page(s).\n",max_pages);
//15bpp
if(modeinfo->bytesperpixel!=0)
vga_claimvideomemory(max_pages * modeinfo->height * modeinfo->width * modeinfo->bytesperpixel);
else
vga_claimvideomemory(max_pages * modeinfo->height * modeinfo->width * mode_bpp / 8);
cpage=old_page=0;
svga_clear_box(0,0,modeinfo->width,modeinfo->height * max_pages);
image_height=req_h;
image_width=req_w;
x_pos = (modeinfo->width - req_w) / 2;
y_pos = (modeinfo->height - req_h) / 2;
x_pos &= ~(15); //align x offset position to 16 pixels
mp_tmsg(MSGT_VO,MSGL_INFO, "[VO_SVGA] Centering image. Starting at (%d,%d)\n",x_pos,y_pos);
vga_setdisplaystart(0);
return 0;
}
static int draw_slice(uint8_t *image[],int stride[],
int w, int h, int x, int y) {
assert(0);
return VO_ERROR;//this is yv12 only -> vf_scale should do all transforms
}
static int draw_frame(uint8_t *src[]) {
assert(0);
return VO_ERROR;//this one should not be called
}
static void draw_osd(void)
{
mp_msg(MSGT_VO,MSGL_DBG4, "vo_svga: draw_osd()\n");
//only modes with bytesperpixel>0 can draw OSD
if(modeinfo->bytesperpixel==0) return;
if(!(mode_capabilities&CAP_LINEAR)) return;//force_native will remove OSD
if(blackbar_osd){
//111
//3 4
//222
svga_clear_box(0,0 + PageStore[cpage].yoffset,
modeinfo->width, y_pos);
svga_clear_box(0, image_height + y_pos + PageStore[cpage].yoffset,
modeinfo->width, modeinfo->height-(image_height+ y_pos));
svga_clear_box(0, y_pos + PageStore[cpage].yoffset,
x_pos, image_height);
svga_clear_box(image_width + x_pos, y_pos + PageStore[cpage].yoffset,
modeinfo->width-(x_pos+image_width), image_height);
// vo_remove_text(modeinfo->width, modeinfo->height, clear_alpha);
vo_draw_text(modeinfo->width, modeinfo->height, draw_alpha);
}else{
vo_draw_text(image_width, image_height, draw_alpha);
}
}
static void flip_page(void) {
PageStore[old_page].locks=PAGE_EMPTY;
PageStore[cpage].locks=PAGE_BUSY;
mp_msg(MSGT_VO,MSGL_DBG3, "vo_svga: viewing page %d\n",cpage);
if(sync_flip && old_page!=cpage){
mp_msg(MSGT_VO,MSGL_DBG3, "vo_svga:vga_waitretrace\n");
vga_waitretrace();
}
vga_setdisplaystart(PageStore[cpage].doffset);
old_page=cpage;//cpage will be overwriten on next draw_image
}
static void check_events(void) {
}
static void uninit(void) {
vga_setmode(TEXT);
}
/* --------------------------------------------------------------------- */
static int query_format(uint32_t format) {
int32_t req_bpp,flags;
int i,lastmode;
vga_modeinfo * vminfo;
mp_msg(MSGT_VO,MSGL_DBG4, "vo_svga: query_format=%X \n",format);
//only RGB modes supported
if( (!IMGFMT_IS_RGB(format)) && (!IMGFMT_IS_BGR(format)) ) return 0;
// Reject different endian
#if HAVE_BIGENDIAN
if (IMGFMT_IS_BGR(format)) return 0;
#else
if (IMGFMT_IS_RGB(format)) return 0;
#endif
//svgalib supports only BG4B! if we want BGR4 we have to emulate it (sw)
if( format==IMGFMT_BGR4 || format==IMGFMT_RGB4) return 0;
req_bpp = IMGFMT_RGB_DEPTH(format);
if( vo_dbpp>0 && vo_dbpp!=req_bpp ) return 0; //support -bpp options
//scan all modes
lastmode = vga_lastmodenumber();
for(i=1;i<=lastmode;i++){
vminfo = vga_getmodeinfo(i);
if( vminfo == NULL ) continue;
if( vga_hasmode(i) == 0 ) continue;
if( req_bpp != bpp_from_vminfo(vminfo) ) continue;
if( (force_vm > 0) && (force_vm != i) ) continue;//quick hack
flags = VFCAP_CSP_SUPPORTED|
VFCAP_CSP_SUPPORTED_BY_HW|
VFCAP_ACCEPT_STRIDE|
0;
if(req_bpp>8) flags|=VFCAP_OSD;
return flags;
}
return 0;
}
static void draw_alpha(int x0, int y0, int w, int h, unsigned char *src,
unsigned char *srca, int stride) {
char* base;
mp_msg(MSGT_VO,MSGL_DBG3, "vo_svga: draw_alpha(x0=%d,y0=%d,w=%d,h=%d,src=%p,srca=%p,stride=%d\n",
x0,y0,w,h,src,srca,stride);
if(!blackbar_osd) {
//drawing in the image, so place the stuff there
x0+=x_pos;
y0+=y_pos;
}
mp_msg(MSGT_VO,MSGL_DBG4, "vo_svga: OSD draw in page %d\n",cpage);
base=PageStore[cpage].vbase + y0*mode_stride + x0*modeinfo->bytesperpixel;
switch (mode_bpp) {
case 32:
vo_draw_alpha_rgb32(w, h, src, srca, stride, base, mode_stride);
break;
case 24:
vo_draw_alpha_rgb24(w, h, src, srca, stride, base, mode_stride);
break;
case 16:
vo_draw_alpha_rgb16(w, h, src, srca, stride, base, mode_stride);
break;
case 15:
vo_draw_alpha_rgb15(w, h, src, srca, stride, base, mode_stride);
break;
}
}
static uint32_t get_image(mp_image_t *mpi){
int page;
if(!IMGFMT_IS_BGR(mpi->imgfmt) && !IMGFMT_IS_RGB(mpi->imgfmt) ){
assert(0);//should never happen
return VO_FALSE;
}
if (
( (mpi->type != MP_IMGTYPE_STATIC) && (mpi->type != MP_IMGTYPE_TEMP)) ||
(mpi->flags & MP_IMGFLAG_PLANAR) ||
(mpi->flags & MP_IMGFLAG_YUV)
)
return VO_FALSE;
//reading from video memory is horribly slow
if( !(mpi->flags & MP_IMGFLAG_READABLE) && vo_directrendering &&
(mode_capabilities & CAP_LINEAR) ){
//find free page and reserve it
page=page_find_free();
if(page >= 0){
PageStore[page].locks=PAGE_BUSY;
mpi->flags |= MP_IMGFLAG_DIRECT;
mpi->stride[0] = mode_stride;
mpi->planes[0] = PageStore[page].vbase +
y_pos*mode_stride + (x_pos*mpi->bpp)/8;
mpi->priv=(void *)page;
mp_msg(MSGT_VO,MSGL_DBG3, "vo_svga: direct render allocated! page=%d\n",page);
return VO_TRUE;
}
}
return VO_FALSE;
}
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