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-rw-r--r--thirdparty/jpeg-compressor/jpgd.cpp8
1 files changed, 4 insertions, 4 deletions
diff --git a/thirdparty/jpeg-compressor/jpgd.cpp b/thirdparty/jpeg-compressor/jpgd.cpp
index baf6ea0484..d6b5d96aac 100644
--- a/thirdparty/jpeg-compressor/jpgd.cpp
+++ b/thirdparty/jpeg-compressor/jpgd.cpp
@@ -1669,7 +1669,7 @@ namespace jpgd {
int row = m_max_mcu_y_size - m_mcu_lines_left;
uint8* d0 = m_pScan_line_0;
- const int half_image_x_size = (m_image_x_size >> 1) - 1;
+ const int half_image_x_size = (m_image_x_size == 1) ? 0 : (m_image_x_size >> 1) - 1;
const int row_x8 = row * 8;
for (int x = 0; x < m_image_x_size; x++)
@@ -1762,7 +1762,7 @@ namespace jpgd {
int y = m_image_y_size - m_total_lines_left;
int row = y & 15;
- const int half_image_y_size = (m_image_y_size >> 1) - 1;
+ const int half_image_y_size = (m_image_y_size == 1) ? 0 : (m_image_y_size >> 1) - 1;
uint8* d0 = m_pScan_line_0;
@@ -1891,7 +1891,7 @@ namespace jpgd {
int y = m_image_y_size - m_total_lines_left;
int row = y & 15;
- const int half_image_y_size = (m_image_y_size >> 1) - 1;
+ const int half_image_y_size = (m_image_y_size == 1) ? 0 : (m_image_y_size >> 1) - 1;
uint8* d0 = m_pScan_line_0;
@@ -1915,7 +1915,7 @@ namespace jpgd {
const int y0_base = (c_y0 & 7) * 8 + 256;
const int y1_base = (c_y1 & 7) * 8 + 256;
- const int half_image_x_size = (m_image_x_size >> 1) - 1;
+ const int half_image_x_size = (m_image_x_size == 1) ? 0 : (m_image_x_size >> 1) - 1;
static const uint8_t s_muls[2][2][4] =
{