color key function in zelda picross is not working on miyoo min sdl 1.2

[trngaje]

i am porting zelda-picross to miyoo mini
original source is below
https://github.com/gameblabla/zeldapicross

game screen has blue color key without transparent process.
i think that SDL_SetColorKey function is not working in SDL1.2 miyoo mini device

source code is following:
SDL_SetColorKey(font,SDL_SRCCOLORKEY, SDL_MapRGB(font->format,0,0,255));

[MiyanoOsu]

Maybe toolchain lack this function.

[MiyanoOsu]

Try this

SDL_SetColorKey(font,SDL_SRCCOLORKEY, SDL_MapRGBA(font->format,0,0,255,0));

[trngaje]

result is same though SDL_MapRGBA instead of SDL_MapRGB.
yes, this is work well in pc linux and sdl2.0 other devices.
this screen is displayed only in miyoo mini

attaching a resouce file of them

[MiyanoOsu]

What is your makefile?

[trngaje]

`PRGNAME = Zelda-Picross

define regarding OS, which compiler to use

EXESUFFIX =
TOOLCHAIN =arm-linux-gnueabihf-
CC = $(TOOLCHAIN)gcc
CCP = $(TOOLCHAIN)g++
LD = $(TOOLCHAIN)gcc

add SDL dependencies

SDL_LIB =
SDL_INCLUDE =

change compilation / linking flag options

F_OPTS = -march=armv7-a
CC_OPTS = -O2 -fomit-frame-pointer -fdata-sections -ffunction-sections $(F_OPTS)
CFLAGS = -I$(SDL_INCLUDE) $(CC_OPTS)
CXXFLAGS = $(CFLAGS)
LDFLAGS = -lSDLmain -lSDL -lSDL_mixer -lSDL_image -lSDL_gfx -lstdc++ -lm -Wl,--as-needed -Wl,--gc-sections -flto

Files to be compiled

SRCDIR = ./src
VPATH = $(SRCDIR)
SRC_C = $(foreach dir, $(SRCDIR), $(wildcard $(dir)/.c))
SRC_CP = $(foreach dir, $(SRCDIR), $(wildcard $(dir)/.cpp))
OBJ_C = $(notdir $(patsubst %.c, %.o, $(SRC_C)))
OBJ_CP = $(notdir $(patsubst %.cpp, %.o, $(SRC_CP)))
OBJS = $(OBJ_C) $(OBJ_CP)

Rules to make executable

$(PRGNAME)$(EXESUFFIX): $(OBJS)
$(LD) $(CFLAGS) -o $(PRGNAME)$(EXESUFFIX) $^ $(LDFLAGS)

$(OBJ_C) : %.o : %.c
$(CC) $(CFLAGS) -c -o $@ $<

$(OBJ_CP) : %.o : %.cpp
$(CCP) $(CXXFLAGS) -c -o $@ $<

clean:
rm -f $(PRGNAME)$(EXESUFFIX) *.o

`

[MiyanoOsu]

Did you try Triforce 's toolchain?

[trngaje]

i am using it only

https://github.com/shauninman/union-miyoomini-toolchain

[Rezzy-dev]

Things to check/consider:

https://sdl.libsdl.narkive.com/7sXIwOyd/why-setcolorkey-doesn-t-work

https://stackoverflow.com/questions/4973551/problems-with-sdl-setcolorkey

Also, I don't think this is one of them (transparency should be a given), but there are some SDL rendering issues with the hardware, as the graphics implementation in Miyoo devices is fairly limited to certain 2D rendering functions.

[trngaje]

I solved this after changed SDL_DisplayFormat to SDL_DisplayFormatAlpha.

last I have to solve ogg file is not playing in sdl mixer.
"Mix_LoadWAV("data/sound/text.ogg"); " return NULL
i think current SDL mixer not include ogg function.

i checked it by following test code.
if (Mix_OpenAudio(44100, MIX_DEFAULT_FORMAT, 2, 1024)==-1) { fprintf(stderr, "Mix_OpenAudio: %s\n", Mix_GetError()); exit(2); } int flags = MIX_INIT_OGG | MIX_INIT_MOD; int initted = Mix_Init(flags); if ((initted & flags) != flags) { fprintf(stderr, "Mix_Init: Failed to init required ogg and mod support!\n"); fprintf(stderr, "Mix_Init: %s\n", Mix_GetError()); // handle error }

and i got
Mix_Init: Failed to init required ogg and mod support! Mix_Init: Mixer not built with Ogg Vorbis support

[Rezzy-dev]

I'm not sure about SDL Mixer supporting OGG -- apparently it's tricky to get it to work with OGG -- but I found this workaround/solution:

https://stackoverflow.com/a/48458118

You can add and use the stb_vorbis C library to play OGG Vorbis audio files.

[Rezzy-dev]

"In a recent version of SDL (1.2.10 I believe), .OGG support broke. This bug was supposedly fixed in the most recent release of SDL (1.2.11)."

https://www.gamedev.net/forums/topic/412533-using-sdl_mixer-to-play-ogg-sound-not-music-effects/

(Apparently SDL has a history of breaking its OGG support.)

[trngaje]

Currently, miyu mini sdl mixer does not include the ogg library, so I changed all the ogg files in zelda picross to mp3 and played.

[Rezzy-dev]

Probably easier than implementing and using a new library. Nods.