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Cursor drawing support

Originally committed as revision 6183 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Kostya Shishkov 2006-09-07 04:01:42 +00:00
parent b2565d710f
commit 54b55c8da0

View File

@ -60,6 +60,13 @@ typedef struct VmncContext {
int bigendian;
uint8_t pal[768];
int width, height;
/* cursor data */
int cur_w, cur_h;
int cur_x, cur_y;
int cur_hx, cur_hy;
uint8_t* curbits, *curmask;
uint8_t* screendta;
} VmncContext;
/* read pixel value from stream */
@ -75,6 +82,93 @@ static always_inline int vmnc_get_pixel(uint8_t* buf, int bpp, int be) {
}
}
static void load_cursor(VmncContext *c, uint8_t *src)
{
int i, j, p;
const int bpp = c->bpp2;
uint8_t *dst8 = c->curbits;
uint16_t *dst16 = (uint16_t*)c->curbits;
uint32_t *dst32 = (uint32_t*)c->curbits;
for(j = 0; j < c->cur_h; j++) {
for(i = 0; i < c->cur_w; i++) {
p = vmnc_get_pixel(src, bpp, c->bigendian);
src += bpp;
if(bpp == 1) *dst8++ = p;
if(bpp == 2) *dst16++ = p;
if(bpp == 4) *dst32++ = p;
}
}
dst8 = c->curmask;
dst16 = (uint16_t*)c->curmask;
dst32 = (uint32_t*)c->curmask;
for(j = 0; j < c->cur_h; j++) {
for(i = 0; i < c->cur_w; i++) {
p = vmnc_get_pixel(src, bpp, c->bigendian);
src += bpp;
if(bpp == 1) *dst8++ = p;
if(bpp == 2) *dst16++ = p;
if(bpp == 4) *dst32++ = p;
}
}
}
static void put_cursor(uint8_t *dst, int stride, VmncContext *c, int dx, int dy)
{
int i, j, t;
int w, h, x, y;
w = c->cur_w;
if(c->width < c->cur_x + c->cur_w) w = c->width - c->cur_x;
h = c->cur_h;
if(c->height < c->cur_y + c->cur_h) h = c->height - c->cur_y;
x = c->cur_x;
y = c->cur_y;
if(x < 0) {
w += x;
x = 0;
}
if(y < 0) {
h += y;
y = 0;
}
if((w < 1) || (h < 1)) return;
dst += x * c->bpp2 + y * stride;
if(c->bpp2 == 1) {
uint8_t* cd = c->curbits, *msk = c->curmask;
for(j = 0; j < h; j++) {
for(i = 0; i < w; i++)
dst[i] = (dst[i] & cd[i]) ^ msk[i];
msk += c->cur_w;
cd += c->cur_w;
dst += stride;
}
} else if(c->bpp2 == 2) {
uint16_t* cd = (uint16_t*)c->curbits, *msk = (uint16_t*)c->curmask;
uint16_t* dst2;
for(j = 0; j < h; j++) {
dst2 = (uint16_t*)dst;
for(i = 0; i < w; i++)
dst2[i] = (dst2[i] & cd[i]) ^ msk[i];
msk += c->cur_w;
cd += c->cur_w;
dst += stride;
}
} else if(c->bpp2 == 4) {
uint32_t* cd = (uint32_t*)c->curbits, *msk = (uint32_t*)c->curmask;
uint32_t* dst2;
for(j = 0; j < h; j++) {
dst2 = (uint32_t*)dst;
for(i = 0; i < w; i++)
dst2[i] = (dst2[i] & cd[i]) ^ msk[i];
msk += c->cur_w;
cd += c->cur_w;
dst += stride;
}
}
}
/* fill rectangle with given colour */
static always_inline void paint_rect(uint8_t *dst, int dx, int dy, int w, int h, int color, int bpp, int stride)
{
@ -194,6 +288,31 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, uint8
c->pic.key_frame = 0;
c->pic.pict_type = FF_P_TYPE;
//restore screen after cursor
if(c->screendta) {
int i;
w = c->cur_w;
if(c->width < c->cur_x + w) w = c->width - c->cur_x;
h = c->cur_h;
if(c->height < c->cur_y + h) h = c->height - c->cur_y;
dx = c->cur_x;
if(dx < 0) {
w += dx;
dx = 0;
}
dy = c->cur_y;
if(dy < 0) {
h += dy;
dy = 0;
}
if((w > 0) && (h > 0)) {
outptr = c->pic.data[0] + dx * c->bpp2 + dy * c->pic.linesize[0];
for(i = 0; i < h; i++) {
memcpy(outptr, c->screendta + i * c->cur_w * c->bpp2, w * c->bpp2);
outptr += c->pic.linesize[0];
}
}
}
src += 2;
chunks = BE_16(src); src += 2;
while(chunks--) {
@ -202,15 +321,30 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, uint8
w = BE_16(src); src += 2;
h = BE_16(src); src += 2;
enc = BE_32(src); src += 4;
outptr = c->pic.data[0] + dx * c->bpp2 + dy * c->pic.linesize[0];
switch(enc) {
case MAGIC_WMVd: // unknown
case MAGIC_WMVd: // cursor
src += 2;
src += w * h * 8; // skip this data for now
c->cur_w = w;
c->cur_h = h;
c->cur_hx = dx;
c->cur_hy = dy;
if((c->cur_hx > c->cur_w) || (c->cur_hy > c->cur_h)) {
av_log(avctx, AV_LOG_ERROR, "Cursor hot spot is not in image: %ix%i of %ix%i cursor size\n", c->cur_hx, c->cur_hy, c->cur_w, c->cur_h);
c->cur_hx = c->cur_hy = 0;
}
c->curbits = av_realloc(c->curbits, c->cur_w * c->cur_h * c->bpp2);
c->curmask = av_realloc(c->curmask, c->cur_w * c->cur_h * c->bpp2);
c->screendta = av_realloc(c->screendta, c->cur_w * c->cur_h * c->bpp2);
load_cursor(c, src);
src += w * h * c->bpp2 * 2;
break;
case MAGIC_WMVe: // unknown
src += 2;
break;
case MAGIC_WMVf: // unknown and empty
case MAGIC_WMVf: // update cursor position
c->cur_x = dx - c->cur_hx;
c->cur_y = dy - c->cur_hy;
break;
case MAGIC_WMVi: // ServerInitialization struct
c->pic.key_frame = 1;
@ -233,7 +367,6 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, uint8
av_log(avctx, AV_LOG_ERROR, "Incorrect frame size: %ix%i+%ix%i of %ix%i\n", w, h, dx, dy, c->width, c->height);
return -1;
}
outptr = c->pic.data[0] + dx * c->bpp2 + dy * c->pic.linesize[0];
paint_raw(outptr, w, h, src, c->bpp2, c->bigendian, c->pic.linesize[0]);
src += w * h * c->bpp2;
break;
@ -242,7 +375,6 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, uint8
av_log(avctx, AV_LOG_ERROR, "Incorrect frame size: %ix%i+%ix%i of %ix%i\n", w, h, dx, dy, c->width, c->height);
return -1;
}
outptr = c->pic.data[0] + dx * c->bpp2 + dy * c->pic.linesize[0];
res = decode_hextile(c, outptr, src, w, h, c->pic.linesize[0]);
if(res < 0)
return -1;
@ -253,6 +385,33 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, uint8
chunks = 0; // leave chunks decoding loop
}
}
if(c->screendta){
int i;
//save screen data before painting cursor
w = c->cur_w;
if(c->width < c->cur_x + w) w = c->width - c->cur_x;
h = c->cur_h;
if(c->height < c->cur_y + h) h = c->height - c->cur_y;
dx = c->cur_x;
if(dx < 0) {
w += dx;
dx = 0;
}
dy = c->cur_y;
if(dy < 0) {
h += dy;
dy = 0;
}
if((w > 0) && (h > 0)) {
outptr = c->pic.data[0] + dx * c->bpp2 + dy * c->pic.linesize[0];
for(i = 0; i < h; i++) {
memcpy(c->screendta + i * c->cur_w * c->bpp2, outptr, w * c->bpp2);
outptr += c->pic.linesize[0];
}
outptr = c->pic.data[0];
put_cursor(outptr, c->pic.linesize[0], c, c->cur_x, c->cur_y);
}
}
*data_size = sizeof(AVFrame);
*(AVFrame*)data = c->pic;
@ -315,6 +474,9 @@ static int decode_end(AVCodecContext *avctx)
if (c->pic.data[0])
avctx->release_buffer(avctx, &c->pic);
av_free(c->curbits);
av_free(c->curmask);
av_free(c->screendta);
return 0;
}