[intro] add natasha orca when we have pixel support #1423

include/notcurses/notcurses.h

@@ -2383,8 +2383,9 @@ API ALLOC struct ncvisual* ncvisual_from_plane(const struct ncplane* n,
                                                int begy, int begx,
                                                int leny, int lenx);
 
-#define NCVISUAL_OPTION_NODEGRADE 0x0001ull // fail rather than degrade
-#define NCVISUAL_OPTION_BLEND     0x0002ull // use CELL_ALPHA_BLEND with visual
+#define NCVISUAL_OPTION_NODEGRADE  0x0001ull // fail rather than degrade
+#define NCVISUAL_OPTION_BLEND      0x0002ull // use CELL_ALPHA_BLEND with visual
+#define NCVISUAL_OPTION_HORALIGNED 0x0004ull // x is an alignment, not absolute
 
 struct ncvisual_options {
   // if no ncplane is provided, one will be created using the exact size
@@ -2397,7 +2398,8 @@ struct ncvisual_options {
   ncscale_e scaling;
   // if an ncplane is provided, y and x specify where the visual will be
   // rendered on that plane. otherwise, they specify where the created ncplane
-  // will be placed relative to the standard plane's origin.
+  // will be placed relative to the standard plane's origin. x is an ncalign_e
+  // value if NCVISUAL_OPTION_HORALIGNED is provided.
   int y, x;
   // the section of the visual that ought be rendered. for the entire visual,
   // pass an origin of 0, 0 and a size of 0, 0 (or the true height and width).
@@ -2405,8 +2407,9 @@ struct ncvisual_options {
   // prohibited.
   int begy, begx; // origin of rendered section
   int leny, lenx; // size of rendered section
-  // use NCBLIT_DEFAULT if you don't care, to use NCBLIT_2x2 (assuming
-  // UTF8) or NCBLIT_1x1 (in an ASCII environment)
+  // use NCBLIT_DEFAULT if you don't care, an appropriate blitter will be
+  // chosen for your terminal, given your scaling. NCBLIT_PIXEL is never
+  // chosen for NCBLIT_DEFAULT.
   ncblitter_e blitter; // glyph set to use (maps input to output cells)
   uint64_t flags; // bitmask over NCVISUAL_OPTION_*
 };

src/demo/fallin.c

@@ -186,32 +186,35 @@ int fallin_demo(struct notcurses* nc){
   struct ncplane* n = NULL;
 #ifndef DFSG_BUILD
   if(notcurses_canopen_images(nc)){
-  char* path = find_data("lamepatents.jpg");
-  struct ncvisual* ncv = ncvisual_from_file(path);
-  free(path);
-  if(ncv == NULL){
-    goto err;
-  }
-  struct ncplane_options nopts = {
-    .rows = dimy - 2,
-    .cols = dimx,
-    .y = 1,
-  };
-  n = ncplane_create(stdn, &nopts);
-  if(n == NULL){
-    goto err;
-  }
-  struct ncvisual_options vopts = {
-    .scaling = NCSCALE_STRETCH,
-    //.blitter = NCBLIT_PIXEL,
-    .n = n,
-  };
-  if(ncvisual_render(nc, ncv, &vopts) == NULL){
+    char* path = find_data("lamepatents.jpg");
+    if(path == NULL){
+      goto err;
+    }
+    struct ncvisual* ncv = ncvisual_from_file(path);
+    free(path);
+    if(ncv == NULL){
+      goto err;
+    }
+    struct ncplane_options nopts = {
+      .rows = dimy - 2,
+      .cols = dimx,
+      .y = 1,
+    };
+    n = ncplane_create(stdn, &nopts);
+    if(n == NULL){
+      goto err;
+    }
+    struct ncvisual_options vopts = {
+      .scaling = NCSCALE_STRETCH,
+      //.blitter = NCBLIT_PIXEL,
+      .n = n,
+    };
+    if(ncvisual_render(nc, ncv, &vopts) == NULL){
+      ncvisual_destroy(ncv);
+      goto err;
+    }
+    assert(ncvisual_decode(ncv) == 1);
     ncvisual_destroy(ncv);
-    goto err;
-  }
-  assert(ncvisual_decode(ncv) == 1);
-  ncvisual_destroy(ncv);
   }
 #endif
   int ret = drop_bricks(nc, arr, arrcount);

src/demo/intro.c

@@ -28,6 +28,31 @@ fader(struct notcurses* nc, struct ncplane* ncp, void* curry){
   return 0;
 }
 
+static int
+orcaride(struct notcurses* nc){
+  char* path = find_data("natasha-blur.png");
+  if(path == NULL){
+    return -1;
+  }
+  struct ncvisual* ncv = ncvisual_from_file(path);
+  free(path);
+  if(ncv == NULL){
+    return -1;
+  }
+  struct ncvisual_options vopts = {
+    .blitter = NCBLIT_PIXEL,
+    .flags = NCVISUAL_OPTION_NODEGRADE,
+  };
+  struct ncplane* n = ncvisual_render(nc, ncv, &vopts);
+  if(n == NULL){
+    ncvisual_destroy(ncv);
+    return -1;
+  }
+  DEMO_RENDER(nc);
+  ncvisual_destroy(ncv);
+  return 0;
+}
+
 int intro(struct notcurses* nc){
   if(!notcurses_canutf8(nc)){
     return 0;
@@ -146,6 +171,9 @@ int intro(struct notcurses* nc){
     }
     ncplane_off_styles(ncp, NCSTYLE_BLINK); // heh FIXME replace with pulse
   }
+  if(notcurses_check_pixel_support(nc) && notcurses_canopen_images(nc)){
+    orcaride(nc);
+  }
   struct timespec now;
   clock_gettime(CLOCK_MONOTONIC, &now);
   uint64_t deadline = timespec_to_ns(&now) + timespec_to_ns(&demodelay) * 2;