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authorLei Zhang <thestig@chromium.org>2018-03-21 17:24:46 +0000
committerChromium commit bot <commit-bot@chromium.org>2018-03-21 17:24:46 +0000
commit3851aff62c7ad2f9c942b4d5d095ec0e6610bb84 (patch)
treec15c662f2f9ac851c33fe1603057088d4eb319b5 /core/fxcodec/codec
parentbf85feeafdd8791f9dab7bfcd14ff850e015be26 (diff)
downloadpdfium-3851aff62c7ad2f9c942b4d5d095ec0e6610bb84.tar.xz
Add helpers to work with FXDIB_Format.
Helper functions make getting the bpp and component count more readable. Change-Id: Ie0f97d52136d11ef5251f6e22748e87aea289ae1 Reviewed-on: https://pdfium-review.googlesource.com/28572 Commit-Queue: Lei Zhang <thestig@chromium.org> Reviewed-by: Henrique Nakashima <hnakashima@chromium.org>
Diffstat (limited to 'core/fxcodec/codec')
-rw-r--r--core/fxcodec/codec/fx_codec_progress.cpp28
1 files changed, 13 insertions, 15 deletions
diff --git a/core/fxcodec/codec/fx_codec_progress.cpp b/core/fxcodec/codec/fx_codec_progress.cpp
index 7e29524b2f..8807879e6e 100644
--- a/core/fxcodec/codec/fx_codec_progress.cpp
+++ b/core/fxcodec/codec/fx_codec_progress.cpp
@@ -1478,12 +1478,10 @@ void CCodec_ProgressiveDecoder::ReSampleScanline(
int des_left = m_startX;
uint8_t* des_scan =
pDeviceBitmap->GetBuffer() + des_line * pDeviceBitmap->GetPitch();
- int src_bpp = src_format & 0xff;
- int des_bpp = pDeviceBitmap->GetBPP();
- int src_Bpp = src_bpp >> 3;
- int des_Bpp = des_bpp >> 3;
- src_scan += src_left * src_Bpp;
- des_scan += des_left * des_Bpp;
+ int src_bytes_per_pixel = (src_format & 0xff) / 8;
+ int dest_bytes_per_pixel = pDeviceBitmap->GetBPP() / 8;
+ src_scan += src_left * src_bytes_per_pixel;
+ des_scan += des_left * dest_bytes_per_pixel;
for (int des_col = 0; des_col < m_sizeX; des_col++) {
PixelWeight* pPixelWeights = m_WeightHorz.GetPixelWeight(des_col);
switch (m_TransMethod) {
@@ -1523,7 +1521,7 @@ void CCodec_ProgressiveDecoder::ReSampleScanline(
j++) {
int pixel_weight =
pPixelWeights->m_Weights[j - pPixelWeights->m_SrcStart];
- const uint8_t* src_pixel = src_scan + j * src_Bpp;
+ const uint8_t* src_pixel = src_scan + j * src_bytes_per_pixel;
des_b += pixel_weight * (*src_pixel++);
des_g += pixel_weight * (*src_pixel++);
des_r += pixel_weight * (*src_pixel);
@@ -1537,7 +1535,7 @@ void CCodec_ProgressiveDecoder::ReSampleScanline(
j++) {
int pixel_weight =
pPixelWeights->m_Weights[j - pPixelWeights->m_SrcStart];
- const uint8_t* src_pixel = src_scan + j * src_Bpp;
+ const uint8_t* src_pixel = src_scan + j * src_bytes_per_pixel;
uint8_t src_b = 0;
uint8_t src_g = 0;
uint8_t src_r = 0;
@@ -1562,7 +1560,7 @@ void CCodec_ProgressiveDecoder::ReSampleScanline(
des_g += pixel_weight * src_scan[j];
}
memset(des_scan, (uint8_t)(des_g >> 16), 3);
- des_scan += des_Bpp;
+ des_scan += dest_bytes_per_pixel;
} break;
case 8: {
int des_r = 0, des_g = 0, des_b = 0;
@@ -1578,7 +1576,7 @@ void CCodec_ProgressiveDecoder::ReSampleScanline(
*des_scan++ = (uint8_t)((des_b) >> 16);
*des_scan++ = (uint8_t)((des_g) >> 16);
*des_scan++ = (uint8_t)((des_r) >> 16);
- des_scan += des_Bpp - 3;
+ des_scan += dest_bytes_per_pixel - 3;
} break;
case 12: {
if (m_pBmpContext) {
@@ -1620,7 +1618,7 @@ void CCodec_ProgressiveDecoder::ReSampleScanline(
j++) {
int pixel_weight =
pPixelWeights->m_Weights[j - pPixelWeights->m_SrcStart];
- const uint8_t* src_pixel = src_scan + j * src_Bpp;
+ const uint8_t* src_pixel = src_scan + j * src_bytes_per_pixel;
des_b += pixel_weight * (*src_pixel++);
des_g += pixel_weight * (*src_pixel++);
des_r += pixel_weight * (*src_pixel);
@@ -1628,7 +1626,7 @@ void CCodec_ProgressiveDecoder::ReSampleScanline(
*des_scan++ = (uint8_t)((des_b) >> 16);
*des_scan++ = (uint8_t)((des_g) >> 16);
*des_scan++ = (uint8_t)((des_r) >> 16);
- des_scan += des_Bpp - 3;
+ des_scan += dest_bytes_per_pixel - 3;
} break;
case 10: {
uint32_t des_b = 0, des_g = 0, des_r = 0;
@@ -1636,7 +1634,7 @@ void CCodec_ProgressiveDecoder::ReSampleScanline(
j++) {
int pixel_weight =
pPixelWeights->m_Weights[j - pPixelWeights->m_SrcStart];
- const uint8_t* src_pixel = src_scan + j * src_Bpp;
+ const uint8_t* src_pixel = src_scan + j * src_bytes_per_pixel;
uint8_t src_b = 0;
uint8_t src_g = 0;
uint8_t src_r = 0;
@@ -1650,7 +1648,7 @@ void CCodec_ProgressiveDecoder::ReSampleScanline(
*des_scan++ = (uint8_t)((des_b) >> 16);
*des_scan++ = (uint8_t)((des_g) >> 16);
*des_scan++ = (uint8_t)((des_r) >> 16);
- des_scan += des_Bpp - 3;
+ des_scan += dest_bytes_per_pixel - 3;
} break;
case 11: {
uint32_t des_alpha = 0, des_r = 0, des_g = 0, des_b = 0;
@@ -1658,7 +1656,7 @@ void CCodec_ProgressiveDecoder::ReSampleScanline(
j++) {
int pixel_weight =
pPixelWeights->m_Weights[j - pPixelWeights->m_SrcStart];
- const uint8_t* src_pixel = src_scan + j * src_Bpp;
+ const uint8_t* src_pixel = src_scan + j * src_bytes_per_pixel;
pixel_weight = pixel_weight * src_pixel[3] / 255;
des_b += pixel_weight * (*src_pixel++);
des_g += pixel_weight * (*src_pixel++);