diff options
Diffstat (limited to 'src/main.cpp')
| -rw-r--r-- | src/main.cpp | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/src/main.cpp b/src/main.cpp index f055db5..f9c3eb8 100644 --- a/src/main.cpp +++ b/src/main.cpp @@ -9,11 +9,18 @@ #include <SDL.h> #include <SDL_framerate.h> +/* HACK: older SDL_gfx versions define GFX_ALPHA_ADJUST in the header */ +#define GFX_ALPHA_ADJUST \ + static __attribute__((unused)) GFX_ALPHA_ADJUST +#include <SDL_gfxBlitFunc.h> +#undef GFX_ALPHA_ADJUST + #include "osc_graphics.h" #include "osc_server.h" #include "layer.h" #include "layer_box.h" +#include "layer_text.h" #include "layer_image.h" #include "layer_video.h" @@ -48,6 +55,46 @@ LayerList layers; int config_dump_osc = 0; +void +rgba_blit_with_alpha(SDL_Surface *src_surf, SDL_Surface *dst_surf, Uint8 alpha) +{ + if (alpha == SDL_ALPHA_TRANSPARENT) { + SDL_FillRect(dst_surf, NULL, + SDL_MapRGBA(dst_surf->format, + 0, 0, 0, SDL_ALPHA_TRANSPARENT)); + return; + } + + Uint8 *src = (Uint8 *)src_surf->pixels; + Uint8 *dst = (Uint8 *)dst_surf->pixels; + SDL_PixelFormat *fmt = src_surf->format; + + int inc = fmt->BytesPerPixel; + int len = src_surf->w * src_surf->h; + + SDL_MAYBE_LOCK(src_surf); + SDL_MAYBE_LOCK(dst_surf); + + GFX_DUFFS_LOOP4({ + register Uint32 pixel; + register int a; + + pixel = *(Uint32 *)src; + a = ((pixel & fmt->Amask) >> fmt->Ashift) << fmt->Aloss; + a = (a*alpha)/SDL_ALPHA_OPAQUE; + a = (a << fmt->Aloss) << fmt->Ashift; + pixel &= ~fmt->Amask; + pixel |= a; + *(Uint32 *)dst = pixel; + + src += inc; + dst += inc; + }, len) + + SDL_MAYBE_UNLOCK(dst_surf); + SDL_MAYBE_UNLOCK(src_surf); +} + static inline void sdl_process_events(void) { @@ -223,6 +270,7 @@ main(int argc, char **argv) REGISTER_LAYER(LayerImage); REGISTER_LAYER(LayerVideo); REGISTER_LAYER(LayerBox); + REGISTER_LAYER(LayerText); osc_server.start(); |