diff options
author | Campbell Barton <ideasman42@gmail.com> | 2014-04-16 17:25:10 +0400 |
---|---|---|
committer | Campbell Barton <ideasman42@gmail.com> | 2014-04-16 17:25:10 +0400 |
commit | d1b1d194dc9cc741d87dc63e701402de0776c694 (patch) | |
tree | 344bde4783c61c65412fa1fd2435e705ead26965 | |
parent | b3972aeea05bc6c60d7b7da4e6b59a64b822448a (diff) |
Fix for half pixel offset rasterizing masks
4 files changed, 21 insertions, 7 deletions
diff --git a/source/blender/blenkernel/intern/mask_rasterize.c b/source/blender/blenkernel/intern/mask_rasterize.c index 92628387dc6..ea039dabce4 100644 --- a/source/blender/blenkernel/intern/mask_rasterize.c +++ b/source/blender/blenkernel/intern/mask_rasterize.c @@ -1434,6 +1434,10 @@ void BKE_maskrasterize_buffer(MaskRasterHandle *mr_handle, const unsigned int width, const unsigned int height, float *buffer) { + const float x_inv = 1.0f / (float)width; + const float y_inv = 1.0f / (float)height; + const float x_px_ofs = x_inv * 0.5f; + const float y_px_ofs = y_inv * 0.5f; #ifdef _MSC_VER int y; /* msvc requires signed for some reason */ @@ -1449,9 +1453,9 @@ void BKE_maskrasterize_buffer(MaskRasterHandle *mr_handle, unsigned int i = y * width; unsigned int x; float xy[2]; - xy[1] = (float)y / (float)height; + xy[1] = ((float)y * y_inv) + y_px_ofs; for (x = 0; x < width; x++, i++) { - xy[0] = (float)x / (float)width; + xy[0] = ((float)x * x_inv) + x_px_ofs; buffer[i] = BKE_maskrasterize_handle_sample(mr_handle, xy); } diff --git a/source/blender/compositor/operations/COM_MaskOperation.cpp b/source/blender/compositor/operations/COM_MaskOperation.cpp index 112b5912ad3..8c8ba93327d 100644 --- a/source/blender/compositor/operations/COM_MaskOperation.cpp +++ b/source/blender/compositor/operations/COM_MaskOperation.cpp @@ -129,8 +129,9 @@ void MaskOperation::determineResolution(unsigned int resolution[2], unsigned int void MaskOperation::executePixelSampled(float output[4], float x, float y, PixelSampler sampler) { - const float xy[2] = {x * this->m_maskWidthInv, - y * this->m_maskHeightInv}; + const float xy[2] = { + (x * this->m_maskWidthInv) + this->m_mask_px_ofs[0], + (y * this->m_maskHeightInv) + this->m_mask_px_ofs[1]}; if (this->m_rasterMaskHandleTot == 1) { if (this->m_rasterMaskHandles[0]) { diff --git a/source/blender/compositor/operations/COM_MaskOperation.h b/source/blender/compositor/operations/COM_MaskOperation.h index 18d7e594104..522b873e167 100644 --- a/source/blender/compositor/operations/COM_MaskOperation.h +++ b/source/blender/compositor/operations/COM_MaskOperation.h @@ -43,6 +43,7 @@ protected: int m_maskHeight; float m_maskWidthInv; /* 1 / m_maskWidth */ float m_maskHeightInv; /* 1 / m_maskHeight */ + float m_mask_px_ofs[2]; float m_frame_shutter; int m_frame_number; @@ -70,11 +71,13 @@ public: { this->m_maskWidth = width; this->m_maskWidthInv = 1.0f / (float)width; + this->m_mask_px_ofs[0] = this->m_maskWidthInv * 0.5f; } void setMaskHeight(int height) { this->m_maskHeight = height; this->m_maskHeightInv = 1.0f / (float)height; + this->m_mask_px_ofs[1] = this->m_maskHeightInv * 0.5f; } void setFramenumber(int frame_number) { this->m_frame_number = frame_number; } void setSmooth(bool smooth) { this->m_do_smooth = smooth; } diff --git a/source/blender/editors/mask/mask_draw.c b/source/blender/editors/mask/mask_draw.c index e84bdf12067..08896b39682 100644 --- a/source/blender/editors/mask/mask_draw.c +++ b/source/blender/editors/mask/mask_draw.c @@ -643,15 +643,21 @@ static void mask_rasterize_func(TaskPool *pool, void *taskdata, int UNUSED(threa ThreadedMaskRasterizeState *state = (ThreadedMaskRasterizeState *) BLI_task_pool_userdata(pool); ThreadedMaskRasterizeData *data = (ThreadedMaskRasterizeData *) taskdata; int scanline; + const float x_inv = 1.0f / (float)state->width; + const float y_inv = 1.0f / (float)state->height; + const float x_px_ofs = x_inv * 0.5f; + const float y_px_ofs = y_inv * 0.5f; for (scanline = 0; scanline < data->num_scanlines; scanline++) { + float xy[2]; int x, y = data->start_scanline + scanline; + + xy[1] = ((float)y * y_inv) + y_px_ofs; + for (x = 0; x < state->width; x++) { int index = y * state->width + x; - float xy[2]; - xy[0] = (float) x / state->width; - xy[1] = (float) y / state->height; + xy[0] = ((float)x * x_inv) + x_px_ofs; state->buffer[index] = BKE_maskrasterize_handle_sample(state->handle, xy); } |