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raster: fix scaling, broken by [2a19b8]

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gitlost 2020-07-20 12:06:14 +01:00
parent 52d08fd9b9
commit 7c4ddcfc52
2 changed files with 79 additions and 2 deletions
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5
backend/raster.c
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@ -1019,9 +1019,10 @@ static int plot_raster_default(struct zint_symbol *symbol, int rotate_angle, int
memset(scaled_pixelbuf, DEFAULT_PAPER, scale_width * scale_height);
for (vert = 0; vert < scale_height; vert++) {
double vert_scaled = (vert * image_width) / scaler;
int vert_row = vert * scale_width;
int image_vert_row = ((int) (vert / scaler)) * image_width;
for (horiz = 0; horiz < scale_width; horiz++) {
*(scaled_pixelbuf + (vert * scale_width) + horiz) = *(pixelbuf + (int) (vert_scaled + (horiz / scaler)));
*(scaled_pixelbuf + vert_row + horiz) = *(pixelbuf + image_vert_row + (int) (horiz / scaler));
}
}

76
backend/tests/test_raster.c
View File

@ -749,6 +749,81 @@ static void test_code128_utf8(int index, int debug) {
testFinish();
}
static void test_scale(int index, int debug) {
testStart("");
int ret;
struct item {
int symbology;
int option_2;
float scale;
unsigned char *data;
int expected_height;
int expected_rows;
int expected_width;
int expected_bitmap_width;
int expected_bitmap_height;
int expected_set_row;
int expected_set_rows;
int expected_set_col;
int expected_set_len;
};
// s/\/\*[ 0-9]*\*\//\=printf("\/*%3d*\/", line(".") - line("'<"))
struct item data[] = {
/* 0*/ { BARCODE_PDF417, -1, 0, "1", 18, 6, 103, 206, 36, 0, 36, 170, 14 }, // With no scaling
/* 1*/ { BARCODE_PDF417, -1, 0.6, "1", 18, 6, 103, 206 * 0.6, 36 * 0.6, 0, 36 * 0.6, 170 * 0.6 + 1, 14 * 0.6 }, // +1 set_col due to some scaling inversion difference
/* 2*/ { BARCODE_PDF417, -1, 1.2, "1", 18, 6, 103, 206 * 1.2, 36 * 1.2, 0, 36 * 1.2, 170 * 1.2 + 1, 14 * 1.2 }, // +1 set_col due to some scaling inversion difference
};
int data_size = ARRAY_SIZE(data);
for (int i = 0; i < data_size; i++) {
if (index != -1 && i != index) continue;
struct zint_symbol *symbol = ZBarcode_Create();
assert_nonnull(symbol, "Symbol not created\n");
int length = testUtilSetSymbol(symbol, data[i].symbology, UNICODE_MODE, -1 /*eci*/, -1 /*option_1*/, data[i].option_2, -1, -1 /*output_options*/, data[i].data, -1, debug);
if (data[i].scale) {
symbol->scale = data[i].scale;
}
ret = ZBarcode_Encode(symbol, data[i].data, length);
assert_zero(ret, "i:%d ZBarcode_Encode(%d) ret %d != 0 %s\n", i, data[i].symbology, ret, symbol->errtxt);
ret = ZBarcode_Buffer(symbol, 0);
assert_zero(ret, "i:%d ZBarcode_Buffer(%d) ret %d != 0\n", i, data[i].symbology, ret);
assert_nonnull(symbol->bitmap, "i:%d (%d) symbol->bitmap NULL\n", i, data[i].symbology);
assert_equal(symbol->height, data[i].expected_height, "i:%d (%d) symbol->height %d != %d\n", i, data[i].symbology, symbol->height, data[i].expected_height);
assert_equal(symbol->rows, data[i].expected_rows, "i:%d (%d) symbol->rows %d != %d\n", i, data[i].symbology, symbol->rows, data[i].expected_rows);
assert_equal(symbol->width, data[i].expected_width, "i:%d (%d) symbol->width %d != %d\n", i, data[i].symbology, symbol->width, data[i].expected_width);
assert_equal(symbol->bitmap_width, data[i].expected_bitmap_width, "i:%d (%d) symbol->bitmap_width %d != %d\n", i, data[i].symbology, symbol->bitmap_width, data[i].expected_bitmap_width);
assert_equal(symbol->bitmap_height, data[i].expected_bitmap_height, "i:%d (%d) symbol->bitmap_height %d != %d\n", i, data[i].symbology, symbol->bitmap_height, data[i].expected_bitmap_height);
if (index != -1) testUtilBitmapPrint(symbol);
ret = ZBarcode_Print(symbol, 0);
assert_zero(ret, "i:%d ZBarcode_Print(%d) ret %d != 0\n", i, data[i].symbology, ret);
for (int row = data[i].expected_set_row; row < data[i].expected_set_rows; row++) {
int bits_set = 0;
for (int column = data[i].expected_set_col; column < data[i].expected_set_col + data[i].expected_set_len; column++) {
if (is_row_column_black(symbol, row, column)) {
bits_set++;
}
}
assert_equal(bits_set, data[i].expected_set_len, "i:%d (%d) row %d bits_set %d != expected_set_len %d\n", i, data[i].symbology, row, bits_set, data[i].expected_set_len);
}
ZBarcode_Delete(symbol);
}
testFinish();
}
int main(int argc, char *argv[]) {
testFunction funcs[] = { /* name, func, has_index, has_generate, has_debug */
@ -759,6 +834,7 @@ int main(int argc, char *argv[]) {
{ "test_output_options", test_output_options, 1, 0, 1 },
{ "test_draw_string_wrap", test_draw_string_wrap, 1, 0, 1 },
{ "test_code128_utf8", test_code128_utf8, 1, 0, 1 },
{ "test_scale", test_scale, 1, 0, 1 },
};
testRun(argc, argv, funcs, ARRAY_SIZE(funcs));