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mpv/libvo/vo_svga.c
diego ad603f5559 cosmetics: Remove useless parentheses from from return statements. 
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@26787 b3059339-0415-0410-9bf9-f77b7e298cf2
2008-05-16 08:33:27 +00:00

758 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>
Compleat rewrite by Ivan Kalvachev 19 Mar 2003:
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"
#ifdef CONFIG_VIDIX
#include "vosub_vidix.h"
#endif
#include "sub.h"
#include "mp_msg.h"
#include "help_mp.h"
//#include "mp_image.h"
#include <assert.h>
//silence warnings, probably it have to go in some global header
#define UNUSED(x) ((void)(x))
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>",
""
};
#ifdef CONFIG_VIDIX
static char vidix_name[32] = "";
static vidix_grkey_t gr_key;
#endif
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) {
#ifdef CONFIG_VIDIX
if(memcmp(arg,"vidix",5)==0) {
i=6;
while(arg[i] && arg[i]!=':') i++;
strncpy(vidix_name, arg+6, i-6);
vidix_name[i-5]=0;
if(arg[i]==':')i++;
arg+=i;
vidix_preinit(vidix_name, &video_out_svga);
}
#endif
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) {
if( mp_msg_test(MSGT_VO,MSGL_V) ) 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){
if( mp_msg_test(MSGT_VO,MSGL_DBG3) )
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){
if( mp_msg_test(MSGT_VO,MSGL_DBG3) )
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
if( mp_msg_test(MSGT_VO,MSGL_DBG3) )
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){
if( mp_msg_test(MSGT_VO,MSGL_DBG3) )
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
if( mp_msg_test(MSGT_VO,MSGL_DBG3) )
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
if( mp_msg_test(MSGT_VO,MSGL_DBG3) )
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;
if( mp_msg_test(MSGT_VO,MSGL_DBG3) )
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;
if( mp_msg_test(MSGT_VO,MSGL_DBG4) )
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;
if( mp_msg_test(MSGT_VO,MSGL_DBG4) )
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);
}
#ifdef CONFIG_VIDIX
if (vidix_name[0]) {
switch (request) {
case VOCTRL_SET_EQUALIZER:
{
va_list ap;
int value;
va_start(ap, data);
value = va_arg(ap, int);
va_end(ap);
return vidix_control(request, data, value);
}
case VOCTRL_GET_EQUALIZER:
{
va_list ap;
int *value;
va_start(ap, data);
value = va_arg(ap, int*);
va_end(ap);
return vidix_control(request, data, value);
}
}
return vidix_control(request, data);
}
#endif
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;
if( mp_msg_test(MSGT_VO,MSGL_V) )
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) {
if ( mp_msg_test(MSGT_VO,MSGL_V) ) {
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_msg(MSGT_VO,MSGL_ERR, MSGTR_LIBVO_SVGA_ForcedVidmodeNotAvailable,
vid_mode,vga_getmodename(vid_mode));
return 1; //error;
}
modeinfo=vga_getmodeinfo(vid_mode);
if( (modeinfo->width < req_w) || (modeinfo->height < req_h) ){
mp_msg(MSGT_VO,MSGL_ERR, MSGTR_LIBVO_SVGA_ForcedVidmodeTooSmall,
vid_mode,vga_getmodename(vid_mode));
return 1;
}
}
mode_bpp=bpp_from_vminfo(modeinfo);
mp_msg(MSGT_VO,MSGL_INFO, MSGTR_LIBVO_SVGA_Vidmode,
vid_mode,modeinfo->width,modeinfo->height,mode_bpp);
if (vga_setmode(vid_mode) == -1) {
mp_msg(MSGT_VO,MSGL_ERR, MSGTR_LIBVO_SVGA_VgasetmodeFailed,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_msg(MSGT_VO,MSGL_INFO, MSGTR_LIBVO_SVGA_VideoModeIsLinearAndMemcpyCouldBeUsed);
}
if(mode_capabilities&CAP_ACCEL_PUTIMAGE){
mp_msg(MSGT_VO,MSGL_INFO, MSGTR_LIBVO_SVGA_VideoModeHasHardwareAcceleration);
mp_msg(MSGT_VO,MSGL_INFO, MSGTR_LIBVO_SVGA_IfItWorksForYouIWouldLikeToKnow);
}
//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_msg(MSGT_VO,MSGL_INFO, MSGTR_LIBVO_SVGA_VideoModeHas,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_msg(MSGT_VO,MSGL_INFO, MSGTR_LIBVO_SVGA_CenteringImageStartAt,x_pos,y_pos);
#ifdef CONFIG_VIDIX
if(vidix_name[0]){
vidix_init(width, height, x_pos, y_pos, modeinfo->width, modeinfo->height,
format, mode_bpp, modeinfo->width,modeinfo->height);
mp_msg(MSGT_VO,MSGL_INFO, MSGTR_LIBVO_SVGA_UsingVidix,width,height,
modeinfo->width,modeinfo->height);
vidix_start();
/*set colorkey*/
if(vidix_grkey_support()){
vidix_grkey_get(&gr_key);
gr_key.key_op = KEYS_PUT;
if (!(vo_colorkey & 0xFF000000)) {
gr_key.ckey.op = CKEY_TRUE;
gr_key.ckey.red = (vo_colorkey & 0x00FF0000) >> 16;
gr_key.ckey.green = (vo_colorkey & 0x0000FF00) >> 8;
gr_key.ckey.blue = vo_colorkey & 0x000000FF;
} else
gr_key.ckey.op = CKEY_FALSE;
vidix_grkey_set(&gr_key);
}
}
#endif
vga_setdisplaystart(0);
return 0;
}
static int draw_slice(uint8_t *image[],int stride[],
int w, int h, int x, int y) {
assert(0);
UNUSED(image);UNUSED(stride);
UNUSED(w);UNUSED(h);
UNUSED(x);UNUSED(y);
return VO_ERROR;//this is yv12 only -> vf_scale should do all transforms
}
static int draw_frame(uint8_t *src[]) {
assert(0);
UNUSED(src);
return VO_ERROR;//this one should not be called
}
static void draw_osd(void)
{
if( mp_msg_test(MSGT_VO,MSGL_DBG4) )
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;
if( mp_msg_test(MSGT_VO,MSGL_DBG3) )
mp_msg(MSGT_VO,MSGL_DBG3, "vo_svga: viewing page %d\n",cpage);
if(sync_flip && old_page!=cpage){
if( mp_msg_test(MSGT_VO,MSGL_DBG3) ) 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) {
#ifdef CONFIG_VIDIX
if(vidix_name[0])vidix_term();
#endif
vga_setmode(TEXT);
}
/* --------------------------------------------------------------------- */
static int query_format(uint32_t format) {
int32_t req_bpp,flags;
int i,lastmode;
vga_modeinfo * vminfo;
if ( mp_msg_test(MSGT_VO,MSGL_DBG4) )
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
#ifdef WORDS_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;
if( mp_msg_test(MSGT_VO,MSGL_DBG3) )
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;
}
if( mp_msg_test(MSGT_VO,MSGL_DBG4) )
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;
if( mp_msg_test(MSGT_VO,MSGL_DBG3) )
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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