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rotate-me-fast
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Do a memset for padding.

master
Fabien Freling 2014-08-06 23:22:29 +02:00
parent 237ed00689
commit 723cd88d56
2 changed files with 7 additions and 13 deletions
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2
Makefile
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@ -9,7 +9,7 @@ SRC = rotation.cpp \
HEADERS = image.h \
pnm.h
OBJS = $(patsubst %.cpp,%.o,$(SRC))
IMG = img/lena_64.pgm
IMG = img/lena_1024.pgm
all: $(OBJS)
$(CXX) $(CXXFLAGS) $(LFLAGS) $(OBJS) -o $(BUILD_DIR)/rotation

18
rotation.cpp
View File

@ -600,12 +600,9 @@ Image* rotate(Image const& src, double angle)
}
// Left padding
for (int x = 0; x < left_padding; ++x, ++buffer_index)
{
// Set to black value
// TODO: memset
buffer[buffer_index] = 50;
}
// TODO: set to background value
memset(buffer + buffer_index, 50, left_padding * sizeof (pvalue_t));
buffer_index += left_padding;
// Border
for (int x = 0; x < left_border; ++x, ++buffer_index)
@ -654,12 +651,9 @@ Image* rotate(Image const& src, double angle)
}
// Right padding
for (int x = 0; x < right_padding; ++x, ++buffer_index)
{
// Set to black value
// TODO: memset
buffer[buffer_index] = 100;
}
// TODO: set to background value
memset(buffer + buffer_index, 100, right_padding * sizeof (pvalue_t));
buffer_index += right_padding;
src_rotated_origin += qdy;
}