# Part of JoeyLib, Copyright (c) 2026 Scott Duensing, under the MIT License.
# See LICENSE.md for license information.
# SPDX-License-Identifier: MIT
#
# Host-side tools for the JoeyLib asset pipeline.
#
# These build with the host's default `cc` (no cross-toolchain) into
# build/tools/ (JOEY_BUILD's, make/common.mk). Currently:
#   modloopend  -- inject an E8F stop-marker pattern into a .MOD ahead
#                  of time (the Amiga audio HAL marks a song played with
#                  loop false itself). joeymod invokes it for .amod output.
#   spritebake  -- the sprite pre-compiler, one per target (below).
#
# Asset baking (PNG -> .tbk / .spr) is handled by tools/assetbake/
# assetbake.py (Python). It is invoked directly from each platform's
# Makefile and does not need a C build step.

include $(dir $(lastword $(MAKEFILE_LIST)))/common.mk

BUILD_DIR := $(JOEY_BUILD)/tools
TOOLS_DIR := $(REPO_DIR)/tools

MODLOOPEND_SRC := $(TOOLS_DIR)/modloopend/modloopend.c $(SRC_CORE)/modStopMarker.c
MODLOOPEND_BIN := $(BUILD_DIR)/modloopend

# spritebake -- offline sprite pre-compiler. Built ONCE PER TARGET on the
# host: it links the shared staging (spriteStage.c) + that target's emitter,
# compiled with -DJOEYLIB_PLATFORM_<port> so JOEY_SPRITE_SHIFT_COUNT and the
# emitted machine code match the target while running on the host. Because
# the emitters use only fixed/gated compile-time constants, host output is
# byte-identical to the target JIT (see tools/spritebake/spritebake.c).
SPRITEBAKE_SRC   := $(TOOLS_DIR)/spritebake/spritebake.c $(SRC_CG)/spriteStage.c
SPRITEBAKE_INC   := -I$(INCLUDE_DIR) -I$(SRC_CORE) -I$(SRC_CG)
# The headers that carry the .spc format and the emitted-code ABI (a bump of
# SPC_MAGIC must rebuild every baker, or its .spc files would be refused).
SPRITEBAKE_HDRS  := $(wildcard $(INCLUDE_DIR)/joey/*.h $(SRC_CORE)/*.h $(SRC_CG)/*.h)

.PHONY: all tools clean-tools modloopend \
        spritebake-dos spritebake-amiga spritebake-atarist spritebake-iigs spritebake-x68000
all tools: $(MODLOOPEND_BIN)
modloopend: $(MODLOOPEND_BIN)
spritebake-dos:     $(BUILD_DIR)/spritebake-dos
spritebake-amiga:   $(BUILD_DIR)/spritebake-amiga
spritebake-atarist: $(BUILD_DIR)/spritebake-atarist
spritebake-iigs:    $(BUILD_DIR)/spritebake-iigs
spritebake-x68000:  $(BUILD_DIR)/spritebake-x68000

$(MODLOOPEND_BIN): $(MODLOOPEND_SRC) $(SRC_CORE)/modStopMarker.h
	@mkdir -p $(dir $@)
	$(HOST_CC) $(HOST_CFLAGS) -I$(SRC_CORE) $(MODLOOPEND_SRC) -o $@

$(BUILD_DIR)/spritebake-dos: $(SPRITEBAKE_SRC) $(SRC_X86)/spriteEmitX86.c $(SPRITEBAKE_HDRS)
	@mkdir -p $(dir $@)
	$(HOST_CC) $(HOST_CFLAGS) -DJOEYLIB_PLATFORM_DOS $(SPRITEBAKE_INC) -I$(SRC_X86) $(filter %.c,$^) -o $@

$(BUILD_DIR)/spritebake-amiga: $(SPRITEBAKE_SRC) $(SRC_68K)/spriteEmitPlanar68k.c $(SRC_68K)/spriteC2p.c $(SPRITEBAKE_HDRS)
	@mkdir -p $(dir $@)
	$(HOST_CC) $(HOST_CFLAGS) -DJOEYLIB_PLATFORM_AMIGA $(SPRITEBAKE_INC) -I$(SRC_DIR)/amiga -I$(SRC_68K) $(filter %.c,$^) -o $@

# The X68000 runs the Amiga's planar 68k emitter unchanged (see
# make/x68000.mk), so its bake is the same source under its own target byte.
$(BUILD_DIR)/spritebake-x68000: $(SPRITEBAKE_SRC) $(SRC_68K)/spriteEmitPlanar68k.c $(SRC_68K)/spriteC2p.c $(SPRITEBAKE_HDRS)
	@mkdir -p $(dir $@)
	$(HOST_CC) $(HOST_CFLAGS) -DJOEYLIB_PLATFORM_X68000 $(SPRITEBAKE_INC) -I$(SRC_DIR)/x68000 -I$(SRC_68K) $(filter %.c,$^) -o $@

$(BUILD_DIR)/spritebake-atarist: $(SPRITEBAKE_SRC) $(SRC_68K)/spriteEmitInterleaved68k.c $(SRC_68K)/spriteC2p.c $(SPRITEBAKE_HDRS)
	@mkdir -p $(dir $@)
	$(HOST_CC) $(HOST_CFLAGS) -DJOEYLIB_PLATFORM_ATARIST $(SPRITEBAKE_INC) -I$(SRC_DIR)/atarist -I$(SRC_68K) $(filter %.c,$^) -o $@

$(BUILD_DIR)/spritebake-iigs: $(SPRITEBAKE_SRC) $(SRC_DIR)/iigs/spriteEmitIigs.c $(SPRITEBAKE_HDRS)
	@mkdir -p $(dir $@)
	$(HOST_CC) $(HOST_CFLAGS) -DJOEYLIB_PLATFORM_IIGS $(SPRITEBAKE_INC) $(filter %.c,$^) -o $@

clean-tools:
	rm -rf $(BUILD_DIR)