diff options
Diffstat (limited to 'source/blender/compositor/intern/COM_MemoryBuffer.h')
| -rw-r--r-- | source/blender/compositor/intern/COM_MemoryBuffer.h | 152 |
1 files changed, 139 insertions, 13 deletions
diff --git a/source/blender/compositor/intern/COM_MemoryBuffer.h b/source/blender/compositor/intern/COM_MemoryBuffer.h index 060a67f8797..97b220508e0 100644 --- a/source/blender/compositor/intern/COM_MemoryBuffer.h +++ b/source/blender/compositor/intern/COM_MemoryBuffer.h @@ -50,6 +50,25 @@ class MemoryProxy; * \brief a MemoryBuffer contains access to the data of a chunk */ class MemoryBuffer { + public: + /** + * Offset between elements. + * + * Should always be used for the x dimension when calculating buffer offsets. + * It will be 0 when is_a_single_elem=true. + * e.g: buffer_index = y * buffer.row_stride + x * buffer.elem_stride + */ + int elem_stride; + + /** + * Offset between rows. + * + * Should always be used for the y dimension when calculating buffer offsets. + * It will be 0 when is_a_single_elem=true. + * e.g: buffer_index = y * buffer.row_stride + x * buffer.elem_stride + */ + int row_stride; + private: /** * \brief proxy of the memory (same for all chunks in the same buffer) @@ -82,6 +101,11 @@ class MemoryBuffer { */ uint8_t m_num_channels; + /** + * Whether buffer is a single element in memory. + */ + bool m_is_a_single_elem; + public: /** * \brief construct new temporarily MemoryBuffer for an area @@ -91,7 +115,7 @@ class MemoryBuffer { /** * \brief construct new temporarily MemoryBuffer for an area */ - MemoryBuffer(DataType datatype, const rcti &rect); + MemoryBuffer(DataType datatype, const rcti &rect, bool is_a_single_elem = false); /** * Copy constructor @@ -103,6 +127,102 @@ class MemoryBuffer { */ ~MemoryBuffer(); + /** + * Whether buffer is a single element in memory independently of its resolution. True for set + * operations buffers. + */ + bool is_a_single_elem() const + { + return m_is_a_single_elem; + } + + float &operator[](int index) + { + BLI_assert(m_is_a_single_elem ? index < m_num_channels : + index < get_coords_offset(getWidth(), getHeight())); + return m_buffer[index]; + } + + const float &operator[](int index) const + { + BLI_assert(m_is_a_single_elem ? index < m_num_channels : + index < get_coords_offset(getWidth(), getHeight())); + return m_buffer[index]; + } + + /** + * Get offset needed to jump from buffer start to given coordinates. + */ + int get_coords_offset(int x, int y) const + { + return (y - m_rect.ymin) * row_stride + (x - m_rect.xmin) * elem_stride; + } + + /** + * Get buffer element at given coordinates. + */ + float *get_elem(int x, int y) + { + BLI_assert(x >= m_rect.xmin && x < m_rect.xmax && y >= m_rect.ymin && y < m_rect.ymax); + return m_buffer + get_coords_offset(x, y); + } + + /** + * Get buffer element at given coordinates. + */ + const float *get_elem(int x, int y) const + { + BLI_assert(x >= m_rect.xmin && x < m_rect.xmax && y >= m_rect.ymin && y < m_rect.ymax); + return m_buffer + get_coords_offset(x, y); + } + + /** + * Get channel value at given coordinates. + */ + float &get_value(int x, int y, int channel) + { + BLI_assert(x >= m_rect.xmin && x < m_rect.xmax && y >= m_rect.ymin && y < m_rect.ymax && + channel >= 0 && channel < m_num_channels); + return m_buffer[get_coords_offset(x, y) + channel]; + } + + /** + * Get channel value at given coordinates. + */ + const float &get_value(int x, int y, int channel) const + { + BLI_assert(x >= m_rect.xmin && x < m_rect.xmax && y >= m_rect.ymin && y < m_rect.ymax && + channel >= 0 && channel < m_num_channels); + return m_buffer[get_coords_offset(x, y) + channel]; + } + + /** + * Get the buffer row end. + */ + const float *get_row_end(int y) const + { + BLI_assert(y >= 0 && y < getHeight()); + return m_buffer + (is_a_single_elem() ? m_num_channels : get_coords_offset(getWidth(), y)); + } + + /** + * Get the number of elements in memory for a row. For single element buffers it will always + * be 1. + */ + int get_memory_width() const + { + return is_a_single_elem() ? 1 : getWidth(); + } + + /** + * Get number of elements in memory for a column. For single element buffers it will + * always be 1. + */ + int get_memory_height() const + { + return is_a_single_elem() ? 1 : getHeight(); + } + uint8_t get_num_channels() { return this->m_num_channels; @@ -216,7 +336,7 @@ class MemoryBuffer { int u = x; int v = y; this->wrap_pixel(u, v, extend_x, extend_y); - const int offset = (getWidth() * y + x) * this->m_num_channels; + const int offset = get_coords_offset(u, v); float *buffer = &this->m_buffer[offset]; memcpy(result, buffer, sizeof(float) * this->m_num_channels); } @@ -232,7 +352,7 @@ class MemoryBuffer { int v = y; this->wrap_pixel(u, v, extend_x, extend_y); - const int offset = (getWidth() * v + u) * this->m_num_channels; + const int offset = get_coords_offset(u, v); BLI_assert(offset >= 0); BLI_assert(offset < this->buffer_len() * this->m_num_channels); @@ -258,15 +378,20 @@ class MemoryBuffer { copy_vn_fl(result, this->m_num_channels, 0.0f); return; } - BLI_bilinear_interpolation_wrap_fl(this->m_buffer, - result, - getWidth(), - getHeight(), - this->m_num_channels, - u, - v, - extend_x == MemoryBufferExtend::Repeat, - extend_y == MemoryBufferExtend::Repeat); + if (m_is_a_single_elem) { + memcpy(result, m_buffer, sizeof(float) * this->m_num_channels); + } + else { + BLI_bilinear_interpolation_wrap_fl(this->m_buffer, + result, + getWidth(), + getHeight(), + this->m_num_channels, + u, + v, + extend_x == MemoryBufferExtend::Repeat, + extend_y == MemoryBufferExtend::Repeat); + } } void readEWA(float *result, const float uv[2], const float derivatives[2][2]); @@ -321,9 +446,10 @@ class MemoryBuffer { float get_max_value(const rcti &rect) const; private: + void set_strides(); const int buffer_len() const { - return getWidth() * getHeight(); + return get_memory_width() * get_memory_height(); } #ifdef WITH_CXX_GUARDEDALLOC |