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Florian Forster to sdl in SDL 1.3 (revision 5508 from SVN), the method used to calculate the bits per pixel from a “int format” differ between “SDL_ListModes” (which always uses the “SDL_BITSPERPIXEL” macro) and “SDL_PixelFormatEnumTo- Masks” (which uses either “SDL_BITSPERPIXEL” or “SDL_BYTESPERPIXEL * 8”, depending on the value of “SDL_BYTESPERPIXEL”). Because the values are later compared in “SDL_ListModes” this may lead to some valid video modes not being returned. In my case the only mode returned by “SDL_GetNumDisplayModes” was dismissed and NULL was returned. (This led to the calling application sticking its head in the sand.) The attached patch copies the method used within “SDL_PixelFormatEnumTo- Masks” to “SDL_ListModes”. This solved the problem for me though I don't fully understand the method used by “SDL_PixelFormatEnumToMasks”.
author Sam Lantinga <slouken@libsdl.org>
date Wed, 19 Jan 2011 16:06:47 -0800
parents 033c455bbe99
children 3e4086b3bcd2
line wrap: on
line source



CFLAGS  := -W -Wall -Wextra -g `sdl-config --cflags` -DSDL_NO_COMPAT
LDFLAGS := `sdl-config --libs`

# If it doesn't pick up defaults
#CFLAGS  := -D_GNU_SOURCE=1 -D_REENTRANT -I/usr/local/include/SDL
#LDFLAGS := -lm -ldl -lesd -lpthread

SRC         	:= testsdl.c \
						platform/platform.c \
						rwops/rwops.c \
						rwops/TestSupportRWops.c \
						rect/rect.c \
						surface/surface.c \
						render/render.c \
						audio/audio.c
COMMON_SRC     := SDL_at.c common/common.c
COMMON_INCLUDE := SDL_at.h

TESTS_ALL := testsdl \
	platform/platform \
	rwops/rwops \
	rect/rect \
	surface/surface \
	render/render \
	audio/audio


.PHONY: all clean test


all: $(TESTS_ALL)

test: all
	@./testsdl

testsdl: $(SRC) $(COMMON_SRC)
	$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $(SRC) $(COMMON_SRC)

platform/platform: platform/platform.c $(COMMON_INCLUDE) $(COMMON_SRC)
	$(CC) $(CFLAGS) $(LDFLAGS) -o $@ platform/platform.c $(COMMON_SRC) -DTEST_STANDALONE

rwops/rwops: rwops/rwops.c $(COMMON_INCLUDE) $(COMMON_SRC)
	$(CC) $(CFLAGS) $(LDFLAGS) -o $@ rwops/rwops.c $(COMMON_SRC) -DTEST_STANDALONE

rect/rect: rect/rect.c $(COMMON_INCLUDE) $(COMMON_SRC)
	$(CC) $(CFLAGS) $(LDFLAGS) -o $@ rect/rect.c $(COMMON_SRC) -DTEST_STANDALONE

surface/surface: surface/surface.c $(COMMON_INCLUDE) $(COMMON_SRC)
	$(CC) $(CFLAGS) $(LDFLAGS) -o $@ surface/surface.c $(COMMON_SRC) -DTEST_STANDALONE

render/render: render/render.c $(COMMON_INCLUDE) $(COMMON_SRC)
	$(CC) $(CFLAGS) $(LDFLAGS) -o $@ render/render.c $(COMMON_SRC) -DTEST_STANDALONE

audio/audio: audio/audio.c $(COMMON_INCLUDE) $(COMMON_SRC)
	$(CC) $(CFLAGS) $(LDFLAGS) -o $@ audio/audio.c $(COMMON_SRC) -DTEST_STANDALONE

clean:
	$(RM) $(TESTS_ALL)