Commit: 43a4aaf8e6f0ccbd9ef63c44861206024f71590b
Author: Sergey Sharybin
Date: Thu Aug 27 19:43:33 2015 +0200
Branches: master
https://developer.blender.org/rB43a4aaf8e6f0ccbd9ef63c44861206024f71590b
Compositor: Reduce number of divisions in EWA filtering
===================================================================
M source/blender/compositor/intern/COM_MemoryBuffer.cpp
===================================================================
diff --git a/source/blender/compositor/intern/COM_MemoryBuffer.cpp
b/source/blender/compositor/intern/COM_MemoryBuffer.cpp
index 162e08a..7ee5e2f 100644
--- a/source/blender/compositor/intern/COM_MemoryBuffer.cpp
+++ b/source/blender/compositor/intern/COM_MemoryBuffer.cpp
@@ -204,14 +204,15 @@ static void read_ewa_pixel_sampled(void *userdata, int x,
int y, float result[4]
void MemoryBuffer::readEWA(float *result, const float uv[2], const float
derivatives[2][2])
{
BLI_assert(this->m_datatype == COM_DT_COLOR);
- int width = this->getWidth(), height = this->getHeight();
+ float inv_width = 1.0f / (float)this->getWidth(),
+ inv_height = 1.0f / (float)this->getHeight();
/* TODO(sergey): Render pipeline uses normalized coordinates and
derivatives,
* but compositor uses pixel space. For now let's just divide the
values and
* switch compositor to normalized space for EWA later.
*/
- float uv_normal[2] = {uv[0] / width, uv[1] / height};
- float du_normal[2] = {derivatives[0][0] / width, derivatives[0][1] /
height};
- float dv_normal[2] = {derivatives[1][0] / width, derivatives[1][1] /
height};
+ float uv_normal[2] = {uv[0] * inv_width, uv[1] * inv_height};
+ float du_normal[2] = {derivatives[0][0] * inv_width, derivatives[0][1]
* inv_height};
+ float dv_normal[2] = {derivatives[1][0] * inv_width, derivatives[1][1]
* inv_height};
BLI_ewa_filter(this->getWidth(), this->getHeight(),
false,
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