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#include <assert.h>
#include <stdlib.h>
#include <SDL2/SDL_Surface.h>
#include "kitchensink/kiterror.h"
#include "kitchensink/internal/utils/kitlog.h"
#include "kitchensink/internal/subtitle/kitsubtitlepacket.h"
#include "kitchensink/internal/subtitle/renderers/kitsubimage.h"
static void _ProcessSubImage(SDL_Surface *surface, const AVSubtitleRect *rect, int min_x, int min_y) {
SDL_Surface *src = SDL_CreateRGBSurfaceWithFormatFrom(
rect->data[0], rect->w, rect->h, 8, rect->linesize[0], SDL_PIXELFORMAT_INDEX8);
SDL_SetPaletteColors(src->format->palette, (SDL_Color*)rect->data[1], 0, 256);
SDL_Rect dst_rect;
dst_rect.x = rect->x - min_x;
dst_rect.y = rect->y - min_y;
SDL_BlitSurface(src, NULL, surface, &dst_rect);
}
static Kit_SubtitlePacket* ren_render_image_cb(Kit_SubtitleRenderer *ren, void *src, double start_pts, double end_pts) {
assert(ren != NULL);
assert(src != NULL);
AVSubtitle *sub = src;
SDL_Surface *surface = NULL;
int x0 = INT_MAX, y0 = INT_MAX;
int x1 = 0, y1 = 0;
int w, h;
int has_content = 0;
// Find sizes of incoming subtitle bitmaps
for(int n = 0; n < sub->num_rects; n++) {
AVSubtitleRect *r = sub->rects[n];
if(r->type != SUBTITLE_BITMAP)
continue;
has_content = 1;
if(r->x < x0)
x0 = r->x;
if(r->y < y0)
y0 = r->y;
if(r->x + r->w > x1)
x1 = r->x + r->w;
if(r->y + r->h > y1)
y1 = r->y + r->h;
}
if(has_content == 0) {
return NULL;
}
w = x1 - x0;
h = y1 - y0;
LOG("x, y = %d, %d w, h = %d, %d\n", x0, y0, w, h);
// Surface to render on
surface = SDL_CreateRGBSurfaceWithFormat(0, w, h, 32, SDL_PIXELFORMAT_RGBA32);
SDL_SetSurfaceBlendMode(surface, SDL_BLENDMODE_BLEND);
SDL_FillRect(surface, NULL, 0);
// Render subimages to the target surface.
for(int n = 0; n < sub->num_rects; n++) {
AVSubtitleRect *r = sub->rects[n];
if(r->type != SUBTITLE_BITMAP)
continue;
_ProcessSubImage(surface, r, x0, y0);
}
LOG("Setting %f, %f\n", start_pts, end_pts);
return Kit_CreateSubtitlePacket(start_pts, end_pts, x0, y0, surface);
}
Kit_SubtitleRenderer* Kit_CreateImageSubtitleRenderer(const Kit_Decoder *dec, int w, int h) {
assert(dec != NULL);
assert(w >= 0);
assert(h >= 0);
// Allocate a new renderer
Kit_SubtitleRenderer *ren = Kit_CreateSubtitleRenderer();
if(ren == NULL) {
return NULL;
}
// Only renderer required, no other data.
ren->ren_render = ren_render_image_cb;
ren->ren_close = NULL;
ren->userdata = NULL;
return ren;
}
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