cb8a6814fd
Colors are often thought of as being 4 values that make up that can make any color.
But that is of course too limited. In C we didn’t spend time to annotate what we meant
when using colors.
Recently `BLI_color.hh` was made to facilitate color structures in CPP. CPP has possibilities to
enforce annotating structures during compilation and can adds conversions between them using
function overloading and explicit constructors.
The storage structs can hold 4 channels (r, g, b and a).
Usage:
Convert a theme byte color to a linearrgb premultiplied.
```
ColorTheme4b theme_color;
ColorSceneLinear4f<eAlpha::Premultiplied> linearrgb_color =
BLI_color_convert_to_scene_linear(theme_color).premultiply_alpha();
```
The API is structured to make most use of inlining. Most notable are space
conversions done via `BLI_color_convert_to*` functions.
- Conversions between spaces (theme <=> scene linear) should always be done by
invoking the `BLI_color_convert_to*` methods.
- Encoding colors (compressing to store colors inside a less precision storage)
should be done by invoking the `encode` and `decode` methods.
- Changing alpha association should be done by invoking `premultiply_alpha` or
`unpremultiply_alpha` methods.
# Encoding.
Color encoding is used to store colors with less precision as in using `uint8_t` in
stead of `float`. This encoding is supported for `eSpace::SceneLinear`.
To make this clear to the developer the `eSpace::SceneLinearByteEncoded`
space is added.
# Precision
Colors can be stored using `uint8_t` or `float` colors. The conversion
between the two precisions are available as methods. (`to_4b` and
`to_4f`).
# Alpha conversion
Alpha conversion is only supported in SceneLinear space.
Extending:
- This file can be extended with `ColorHex/Hsl/Hsv` for different representations
of rgb based colors. `ColorHsl4f<eSpace::SceneLinear, eAlpha::Premultiplied>`
- Add non RGB spaces/storages ColorXyz.
Reviewed By: JacquesLucke, brecht
Differential Revision: https://developer.blender.org/D10978
257 lines
9.9 KiB
C++
257 lines
9.9 KiB
C++
/*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#include <iomanip>
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#include <sstream>
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#include "spreadsheet_layout.hh"
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#include "DNA_userdef_types.h"
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#include "UI_interface.h"
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#include "UI_resources.h"
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#include "BLF_api.h"
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namespace blender::ed::spreadsheet {
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class SpreadsheetLayoutDrawer : public SpreadsheetDrawer {
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private:
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const SpreadsheetLayout &spreadsheet_layout_;
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public:
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SpreadsheetLayoutDrawer(const SpreadsheetLayout &spreadsheet_layout)
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: spreadsheet_layout_(spreadsheet_layout)
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{
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tot_columns = spreadsheet_layout.columns.size();
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tot_rows = spreadsheet_layout.row_indices.size();
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left_column_width = spreadsheet_layout.index_column_width;
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}
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void draw_top_row_cell(int column_index, const CellDrawParams ¶ms) const final
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{
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const StringRefNull name = spreadsheet_layout_.columns[column_index].values->name();
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uiBut *but = uiDefIconTextBut(params.block,
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UI_BTYPE_LABEL,
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0,
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ICON_NONE,
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name.c_str(),
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params.xmin,
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params.ymin,
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params.width,
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params.height,
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nullptr,
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0,
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0,
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0,
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0,
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nullptr);
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/* Center-align column headers. */
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UI_but_drawflag_disable(but, UI_BUT_TEXT_LEFT);
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UI_but_drawflag_disable(but, UI_BUT_TEXT_RIGHT);
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}
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void draw_left_column_cell(int row_index, const CellDrawParams ¶ms) const final
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{
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const int real_index = spreadsheet_layout_.row_indices[row_index];
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std::string index_str = std::to_string(real_index);
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uiBut *but = uiDefIconTextBut(params.block,
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UI_BTYPE_LABEL,
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0,
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ICON_NONE,
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index_str.c_str(),
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params.xmin,
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params.ymin,
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params.width,
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params.height,
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nullptr,
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0,
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0,
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0,
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0,
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nullptr);
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/* Right-align indices. */
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UI_but_drawflag_enable(but, UI_BUT_TEXT_RIGHT);
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UI_but_drawflag_disable(but, UI_BUT_TEXT_LEFT);
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}
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void draw_content_cell(int row_index, int column_index, const CellDrawParams ¶ms) const final
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{
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const int real_index = spreadsheet_layout_.row_indices[row_index];
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const ColumnValues &column = *spreadsheet_layout_.columns[column_index].values;
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CellValue cell_value;
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column.get_value(real_index, cell_value);
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if (cell_value.value_int.has_value()) {
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const int value = *cell_value.value_int;
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const std::string value_str = std::to_string(value);
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uiBut *but = uiDefIconTextBut(params.block,
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UI_BTYPE_LABEL,
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0,
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ICON_NONE,
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value_str.c_str(),
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params.xmin,
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params.ymin,
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params.width,
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params.height,
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nullptr,
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0,
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0,
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0,
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0,
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nullptr);
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/* Right-align Integers. */
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UI_but_drawflag_disable(but, UI_BUT_TEXT_LEFT);
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UI_but_drawflag_enable(but, UI_BUT_TEXT_RIGHT);
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}
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else if (cell_value.value_float.has_value()) {
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const float value = *cell_value.value_float;
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std::stringstream ss;
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ss << std::fixed << std::setprecision(3) << value;
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const std::string value_str = ss.str();
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uiBut *but = uiDefIconTextBut(params.block,
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UI_BTYPE_LABEL,
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0,
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ICON_NONE,
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value_str.c_str(),
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params.xmin,
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params.ymin,
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params.width,
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params.height,
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nullptr,
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0,
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0,
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0,
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0,
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nullptr);
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/* Right-align Floats. */
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UI_but_drawflag_disable(but, UI_BUT_TEXT_LEFT);
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UI_but_drawflag_enable(but, UI_BUT_TEXT_RIGHT);
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}
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else if (cell_value.value_bool.has_value()) {
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const bool value = *cell_value.value_bool;
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const int icon = value ? ICON_CHECKBOX_HLT : ICON_CHECKBOX_DEHLT;
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uiBut *but = uiDefIconTextBut(params.block,
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UI_BTYPE_LABEL,
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0,
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icon,
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"",
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params.xmin,
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params.ymin,
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params.width,
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params.height,
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nullptr,
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0,
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0,
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0,
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0,
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nullptr);
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UI_but_drawflag_disable(but, UI_BUT_ICON_LEFT);
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}
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else if (cell_value.value_float2.has_value()) {
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const float2 value = *cell_value.value_float2;
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this->draw_float_vector(params, Span(&value.x, 2));
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}
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else if (cell_value.value_float3.has_value()) {
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const float3 value = *cell_value.value_float3;
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this->draw_float_vector(params, Span(&value.x, 3));
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}
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else if (cell_value.value_color.has_value()) {
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const ColorGeometry4f value = *cell_value.value_color;
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this->draw_float_vector(params, Span(&value.r, 4));
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}
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else if (cell_value.value_object.has_value()) {
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const ObjectCellValue value = *cell_value.value_object;
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uiDefIconTextBut(params.block,
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UI_BTYPE_LABEL,
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0,
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ICON_OBJECT_DATA,
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reinterpret_cast<const ID *const>(value.object)->name + 2,
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params.xmin,
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params.ymin,
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params.width,
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params.height,
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nullptr,
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0,
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0,
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0,
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0,
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nullptr);
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}
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else if (cell_value.value_collection.has_value()) {
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const CollectionCellValue value = *cell_value.value_collection;
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uiDefIconTextBut(params.block,
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UI_BTYPE_LABEL,
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0,
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ICON_OUTLINER_COLLECTION,
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reinterpret_cast<const ID *const>(value.collection)->name + 2,
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params.xmin,
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params.ymin,
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params.width,
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params.height,
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nullptr,
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0,
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0,
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0,
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0,
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nullptr);
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}
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}
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void draw_float_vector(const CellDrawParams ¶ms, const Span<float> values) const
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{
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BLI_assert(!values.is_empty());
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const float segment_width = (float)params.width / values.size();
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for (const int i : values.index_range()) {
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std::stringstream ss;
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const float value = values[i];
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ss << std::fixed << std::setprecision(3) << value;
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const std::string value_str = ss.str();
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uiBut *but = uiDefIconTextBut(params.block,
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UI_BTYPE_LABEL,
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0,
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ICON_NONE,
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value_str.c_str(),
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params.xmin + i * segment_width,
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params.ymin,
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segment_width,
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params.height,
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nullptr,
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0,
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0,
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0,
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0,
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nullptr);
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/* Right-align Floats. */
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UI_but_drawflag_disable(but, UI_BUT_TEXT_LEFT);
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UI_but_drawflag_enable(but, UI_BUT_TEXT_RIGHT);
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}
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}
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int column_width(int column_index) const final
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{
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return spreadsheet_layout_.columns[column_index].width;
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}
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};
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std::unique_ptr<SpreadsheetDrawer> spreadsheet_drawer_from_layout(
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const SpreadsheetLayout &spreadsheet_layout)
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{
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return std::make_unique<SpreadsheetLayoutDrawer>(spreadsheet_layout);
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}
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} // namespace blender::ed::spreadsheet
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