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/*
Video driver for SVGAlib - alpha, slow
by Zoltan Mark Vician <se7en@sch.bme.hu>
Code started: Mon Apr 1 23:25:47 2000
*/
#include <stdio.h>
#include <stdlib.h>
#include <vga.h>
#include <vgagl.h>
#include "config.h"
#include "video_out.h"
#include "video_out_internal.h"
#include "yuv2rgb.h"
LIBVO_EXTERN(svga)
static vo_info_t vo_info = {
"SVGAlib",
"svga",
"Zoltan Mark Vician <se7en@sch.bme.hu>",
""
};
// SVGAlib definitions
GraphicsContext *screen;
GraphicsContext *virt;
static uint8_t *scalebuf = NULL, *yuvbuf = NULL;
static uint32_t orig_w, orig_h, maxw, maxh; // Width, height
static float scaling = 0;
static uint32_t x_pos, y_pos; // Position
// Order must not change!
#define _640x480x32K 0 // 17
#define _640x480x64K 1 // 18
#define _640x480x16M 2 // 19
#define _640x480x16M32 3 // 34
#define _800x600x32K 4 // 20
#define _800x600x64K 5 // 21
#define _800x600x16M 6 // 22
#define _800x600x16M32 7 // 35
#define _1024x768x32K 8 // 23
#define _1024x768x64K 9 // 24
#define _1024x768x16M 10 // 25
#define _1024x768x16M32 11 // 36
#define VID_MODE_NUM 12
static uint8_t vid_modes[VID_MODE_NUM];
static vid_mode_nums[VID_MODE_NUM] = {17,18,19,34,20,21,22,35,23,24,25,36};
static uint8_t vid_mode;
static uint32_t pformat;
static uint8_t checked = 0;
static void checksupportedmodes() {
int i;
checked = 1;
vga_init();
vga_disabledriverreport();
for (i = 0; i < VID_MODE_NUM; i++) {
if (vga_hasmode(vid_mode_nums[i]) > 0)
vid_modes[i] = 1;
else vid_modes[i] = 0;
}
}
static uint32_t init(uint32_t width, uint32_t height, uint32_t d_width,
uint32_t d_height, uint32_t fullscreen, char *title,
uint32_t format) {
static uint8_t bpp;
if (!checked) {
checksupportedmodes(); // Looking for available video modes
}
pformat = format;
if (format == IMGFMT_YV12) bpp = 32;
else bpp = format & 255;
if (d_width > 800)
switch (bpp) {
case 32: vid_mode = 36; break;
case 24: vid_mode = 25; break;
case 16: vid_mode = 24; break;
case 15: vid_mode = 23; break;
}
else
if (d_width > 640)
switch (bpp) {
case 32: vid_mode = 35; break;
case 24: vid_mode = 22; break;
case 16: vid_mode = 21; break;
case 15: vid_mode = 20; break;
}
else
switch (bpp) {
case 32: vid_mode = 34; break;
case 24: vid_mode = 19; break;
case 16: vid_mode = 18; break;
case 15: vid_mode = 17; break;
}
if (vga_setmode(vid_mode) == -1){
printf("vo_svga: vga_setmode(%d) failed.\n",vid_mode);
return(1); // error
}
if (gl_setcontextvga(vid_mode)){
printf("vo_svga: gl_setcontextvga(%d) failed.\n",vid_mode);
return(1); // error
}
screen = gl_allocatecontext();
gl_getcontext(screen);
if (gl_setcontextvgavirtual(vid_mode)){
printf("vo_svga: gl_setcontextvgavirtual(%d) failed.\n",vid_mode);
return(1); // error
}
virt = gl_allocatecontext();
gl_getcontext(virt);
gl_setcontext(virt);
gl_clearscreen(0);
orig_w = width;
orig_h = height;
if (fullscreen && (WIDTH != orig_w)) {
if (((orig_w*1.0) / orig_h) < (4.0/3)) {
maxh = HEIGHT;
scaling = maxh / (orig_h * 1.0);
maxw = (uint32_t) (orig_w * scaling);
scalebuf = malloc(maxw * maxh * BYTESPERPIXEL);
} else {
maxw = WIDTH;
scaling = maxw / (orig_w * 1.0);
maxh = (uint32_t) (orig_h * scaling);
scalebuf = malloc(maxw * maxh * BYTESPERPIXEL);
}
} else {
maxw = orig_w;
maxh = orig_h;
}
x_pos = (WIDTH - maxw) / 2;
y_pos = (HEIGHT - maxh) / 2;
if (pformat == IMGFMT_YV12) {
yuv2rgb_init(bpp, MODE_RGB);
yuvbuf = malloc(maxw * maxh * BYTESPERPIXEL);
}
printf("SVGAlib resolution: %dx%d %dbpp - ", WIDTH, HEIGHT, bpp);
if (maxw != orig_w || maxh != orig_h) printf("Video scaled to: %dx%d\n",maxw,maxh);
else printf("No video scaling\n");
return (0);
}
static uint32_t query_format(uint32_t format) {
if (!checked)
checksupportedmodes(); // Looking for available video modes
switch (format) {
case IMGFMT_RGB32:
case IMGFMT_BGR|32: {
return (vid_modes[_640x480x16M32] | vid_modes[_800x600x16M32] | vid_modes[_1024x768x16M32]);
}
case IMGFMT_RGB24:
case IMGFMT_BGR|24: {
return (vid_modes[_640x480x16M] | vid_modes[_800x600x16M] | vid_modes[_1024x768x16M]);
}
case IMGFMT_RGB16:
case IMGFMT_BGR|16: {
return (vid_modes[_640x480x64K] | vid_modes[_800x600x64K] | vid_modes[_1024x768x64K]);
}
case IMGFMT_RGB15:
case IMGFMT_BGR|15: {
return (vid_modes[_640x480x32K] | vid_modes[_800x600x32K] | vid_modes[_1024x768x32K]);
}
case IMGFMT_YV12: return (1);
}
return (0);
}
static const vo_info_t* get_info(void) {
return (&vo_info);
}
static void draw_alpha(int x0, int y0, int w, int h, unsigned char *src,
unsigned char *srca, int stride) {
int x, y, i;
uint8_t *dest, buf;
// if (pformat == IMGFMT_YV12) {
for (y = 0; y < h; y++) {
dest = virt->vbuf + ((WIDTH * (y0 + y) + x0) * BYTESPERPIXEL);
for (x = 0; x < w; x++) {
if (srca[x]) {
for (i = 0; i < BYTESPERPIXEL; i++)
dest[i] = /*((dest[i] * srca[x]) >> 8) +*/ src[x] >> 6;
}
dest += BYTESPERPIXEL;
}
src += stride;
srca += stride;
}
// }
}
static uint32_t draw_frame(uint8_t *src[]) {
if (pformat == IMGFMT_YV12) {
yuv2rgb(yuvbuf, src[0], src[1], src[2], orig_w, orig_h, orig_w * BYTESPERPIXEL, orig_w, orig_w / 2);
src[0] = yuvbuf;
}
if (scalebuf) {
gl_scalebox(orig_w, orig_h, src[0], maxw, maxh, scalebuf);
src[0] = scalebuf;
}
gl_putbox(x_pos, y_pos, maxw, maxh, src[0]);
}
static uint32_t draw_slice(uint8_t *image[], int stride[],
int w, int h, int x, int y) {
uint8_t *src = yuvbuf;
yuv2rgb(yuvbuf, image[0], image[1], image[2], w, h, orig_w * BYTESPERPIXEL, stride[0], stride[1]);
if (scalebuf) {
gl_scalebox(w, h, yuvbuf,(int) (w * scaling), (int) (h * scaling), scalebuf);
src = scalebuf;
}
gl_putbox(x + x_pos, y + y_pos, (int) (w * scaling), (int) (h * scaling), src);
}
static void flip_page(void) {
if (y_pos) {
gl_fillbox(0, 0, WIDTH, y_pos, 0);
gl_fillbox(0, HEIGHT - y_pos, WIDTH, y_pos, 0);
} else {
gl_fillbox(0, 0, x_pos, HEIGHT, 0);
gl_fillbox(WIDTH - x_pos, 0, x_pos, HEIGHT, 0);
}
vo_draw_text(WIDTH, HEIGHT, draw_alpha);
gl_copyscreen(screen);
}
static void check_events(void) {
}
static void uninit(void) {
gl_freecontext(screen);
gl_freecontext(virt);
vga_setmode(TEXT);
if (scalebuf)
free(scalebuf);
if (yuvbuf)
free(yuvbuf);
}
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