// 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); } }