// Here's the dummy implementation of rle_bwd_create(), if SUPPORT_RLE
// is not defined.
BitmapWithData rle_bwd_create(int resource_id) {
return png_bwd_create(resource_id);
}
// Draws a given hand on the face, using the bitmap structures.
void draw_bitmap_hand(struct HandCache *hand_cache, struct HandDef *hand_def, int hand_index, GContext *ctx) {
if (hand_cache->bitmap_hand_index != hand_index) {
// Force a new bitmap.
if (hand_cache->image.bitmap != NULL) {
bwd_destroy(&hand_cache->image);
}
if (hand_cache->mask.bitmap != NULL) {
bwd_destroy(&hand_cache->mask);
}
hand_cache->bitmap_hand_index = hand_index;
}
struct BitmapHandTableRow *hand = &hand_def->bitmap_table[hand_index];
int bitmap_index = hand->bitmap_index;
struct BitmapHandCenterRow *lookup = &hand_def->bitmap_centers[bitmap_index];
int hand_resource_id = hand_def->resource_id + bitmap_index;
int hand_resource_mask_id = hand_def->resource_mask_id + bitmap_index;
if (hand_def->resource_id == hand_def->resource_mask_id) {
// The hand does not have a mask. Draw the hand on top of the scene.
if (hand_cache->image.bitmap == NULL) {
if (hand_def->use_rle) {
hand_cache->image = rle_bwd_create(hand_resource_id);
} else {
hand_cache->image = png_bwd_create(hand_resource_id);
}
if (hand_cache->image.bitmap == NULL) {
hand_cache_destroy(hand_cache);
trigger_memory_panic(__LINE__);
return;
}
hand_cache->cx = lookup->cx;
hand_cache->cy = lookup->cy;
if (hand->flip_x) {
// To minimize wasteful resource usage, if the hand is symmetric
// we can store only the bitmaps for the right half of the clock
// face, and flip them for the left half.
flip_bitmap_x(hand_cache->image.bitmap, &hand_cache->cx);
}
if (hand->flip_y) {
// We can also do this vertically.
flip_bitmap_y(hand_cache->image.bitmap, &hand_cache->cy);
}
}
// We make sure the dimensions of the GRect to draw into
// are equal to the size of the bitmap--otherwise the image
// will automatically tile.
GRect destination = hand_cache->image.bitmap->bounds;
// Place the hand's center point at place_x, place_y.
destination.origin.x = hand_def->place_x - hand_cache->cx;
destination.origin.y = hand_def->place_y - hand_cache->cy;
// Specify a compositing mode to make the hands overlay on top of
// each other, instead of the background parts of the bitmaps
// blocking each other.
if (hand_def->paint_black) {
// Painting foreground ("white") pixels as black.
graphics_context_set_compositing_mode(ctx, draw_mode_table[config.draw_mode].paint_black);
} else {
// Painting foreground ("white") pixels as white.
graphics_context_set_compositing_mode(ctx, draw_mode_table[config.draw_mode].paint_white);
}
graphics_draw_bitmap_in_rect(ctx, hand_cache->image.bitmap, destination);
} else {
// The hand has a mask, so use it to draw the hand opaquely.
if (hand_cache->image.bitmap == NULL) {
if (hand_def->use_rle) {
hand_cache->image = rle_bwd_create(hand_resource_id);
hand_cache->mask = rle_bwd_create(hand_resource_mask_id);
} else {
hand_cache->image = png_bwd_create(hand_resource_id);
hand_cache->mask = png_bwd_create(hand_resource_mask_id);
}
if (hand_cache->image.bitmap == NULL || hand_cache->mask.bitmap == NULL) {
hand_cache_destroy(hand_cache);
trigger_memory_panic(__LINE__);
return;
}
hand_cache->cx = lookup->cx;
hand_cache->cy = lookup->cy;
if (hand->flip_x) {
// To minimize wasteful resource usage, if the hand is symmetric
// we can store only the bitmaps for the right half of the clock
// face, and flip them for the left half.
flip_bitmap_x(hand_cache->image.bitmap, &hand_cache->cx);
flip_bitmap_x(hand_cache->mask.bitmap, NULL);
}
if (hand->flip_y) {
// We can also do this vertically.
flip_bitmap_y(hand_cache->image.bitmap, &hand_cache->cy);
flip_bitmap_y(hand_cache->mask.bitmap, NULL);
}
}
GRect destination = hand_cache->image.bitmap->bounds;
destination.origin.x = hand_def->place_x - hand_cache->cx;
destination.origin.y = hand_def->place_y - hand_cache->cy;
graphics_context_set_compositing_mode(ctx, draw_mode_table[config.draw_mode].paint_white);
graphics_draw_bitmap_in_rect(ctx, hand_cache->mask.bitmap, destination);
graphics_context_set_compositing_mode(ctx, draw_mode_table[config.draw_mode].paint_black);
graphics_draw_bitmap_in_rect(ctx, hand_cache->image.bitmap, destination);
}
}
