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a539a4d768
Add TinyGL (https://github.com/C-Chads/tinygl), a small software-only implementation of a subset of OpenGL 1.1 written in portable C99, by Fabrice Bellard, Gek and C-Chads, under a zlib-style license. Like graphics/lvgl, the sources are not kept in the repository: the build downloads a pinned git revision from GitHub (CONFIG_TINYGL_VERSION) and applies the NuttX patches that live next to the Makefile: 0001 zfeatures: allow overriding the feature switches at build time 0002 Fix -Wstrict-prototypes warnings 0003 zbuffer: do not over-read the source in ZB_copyFrameBuffer() 0004 zbuffer.h: make the default allocator wrappers static inline The TinyGL compile time features (pixel depth, GL_SELECT, GL_POLYGON, blending, texture size, ...) are exposed as CONFIG_TINYGL_* Kconfig options. They change public structures, so Make.defs / CMakeLists.txt export them to every application that includes <GL/gl.h> or <zbuffer.h>. Both the make and the CMake builds are supported. An unpack stamp file makes sure an object directory created inside the source tree is never mistaken for downloaded sources. Assisted-by: Claude Opus 5.5 (1M context) Signed-off-by: Alan Carvalho de Assis <acassis@gmail.com>
100 lines
3.2 KiB
Makefile
100 lines
3.2 KiB
Makefile
############################################################################
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# apps/graphics/tinygl/Makefile
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#
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# SPDX-License-Identifier: Apache-2.0
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#
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# Licensed to the Apache Software Foundation (ASF) under one or more
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# contributor license agreements. See the NOTICE file distributed with
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# this work for additional information regarding copyright ownership. The
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# ASF licenses this file to you under the Apache License, Version 2.0 (the
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# "License"); you may not use this file except in compliance with the
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# License. You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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#
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############################################################################
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include $(APPDIR)/Make.defs
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# TinyGL software OpenGL library
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TINYGL_URL = $(patsubst "%",%,$(strip $(CONFIG_TINYGL_URL)))
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TINYGL_VERSION = $(patsubst "%",%,$(strip $(CONFIG_TINYGL_VERSION)))
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TINYGL_TARBALL = tinygl-$(TINYGL_VERSION).tar.gz
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TINYGL_UNPACK = tinygl
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TINYGL_PATCHES = $(sort $(wildcard $(CURDIR)/[0-9][0-9][0-9][0-9]-*.patch))
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SRC = $(TINYGL_UNPACK)/src
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CSRCS = $(SRC)/accum.c
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CSRCS += $(SRC)/api.c
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CSRCS += $(SRC)/arrays.c
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CSRCS += $(SRC)/clear.c
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CSRCS += $(SRC)/clip.c
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CSRCS += $(SRC)/get.c
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CSRCS += $(SRC)/image_util.c
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CSRCS += $(SRC)/init.c
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CSRCS += $(SRC)/light.c
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CSRCS += $(SRC)/list.c
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CSRCS += $(SRC)/matrix.c
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CSRCS += $(SRC)/memory.c
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CSRCS += $(SRC)/misc.c
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CSRCS += $(SRC)/msghandling.c
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CSRCS += $(SRC)/select.c
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CSRCS += $(SRC)/specbuf.c
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CSRCS += $(SRC)/texture.c
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CSRCS += $(SRC)/vertex.c
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CSRCS += $(SRC)/zbuffer.c
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CSRCS += $(SRC)/zline.c
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CSRCS += $(SRC)/zmath.c
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CSRCS += $(SRC)/zpostprocess.c
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CSRCS += $(SRC)/zraster.c
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CSRCS += $(SRC)/ztext.c
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CSRCS += $(SRC)/ztriangle.c
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# TinyGL is third party code, silence the warnings that the NuttX build
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# enables but that upstream does not care about.
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CFLAGS += -Wno-shadow -Wno-undef -Wno-unused-function -Wno-unknown-pragmas
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CFLAGS += -Wno-unused-variable -DNDEBUG
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$(TINYGL_TARBALL):
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$(ECHO_BEGIN)"Downloading: $(TINYGL_TARBALL)"
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$(Q) curl -L $(if $(V),,-Ss) -o $(TINYGL_TARBALL) \
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$(TINYGL_URL)/$(TINYGL_VERSION).tar.gz
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$(ECHO_END)
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# The stamp file marks a complete unpack + patch, so that a partially
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# created tree (for example an object directory) is never mistaken for
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# the sources.
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TINYGL_STAMP = $(TINYGL_UNPACK)/.nuttx_patched
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$(TINYGL_STAMP): $(TINYGL_TARBALL)
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$(ECHO_BEGIN)"Unpacking: $(TINYGL_TARBALL) -> $(TINYGL_UNPACK)"
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$(Q) rm -rf $(TINYGL_UNPACK) tinygl-$(TINYGL_VERSION)
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$(Q) tar zxf $(TINYGL_TARBALL)
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$(Q) mv tinygl-$(TINYGL_VERSION) $(TINYGL_UNPACK)
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$(Q) for p in $(TINYGL_PATCHES); do \
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patch -s -N -p1 -d $(TINYGL_UNPACK) < $$p || exit 1; \
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done
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$(Q) touch $@
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$(ECHO_END)
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# Download and unpack tarball if no git repo found
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ifeq ($(wildcard $(TINYGL_UNPACK)/.git),)
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context:: $(TINYGL_STAMP)
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distclean::
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$(call DELDIR, $(TINYGL_UNPACK))
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$(call DELFILE, $(TINYGL_TARBALL))
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endif
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include $(APPDIR)/Application.mk
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