8571dfa881
This replaces the hardcoded function with modifier type callbacks to make it easier to customize the reading/writing for custom modifier data. No functional changes. Pull Request: https://projects.blender.org/blender/blender/pulls/145737
118 lines
3.2 KiB
C++
118 lines
3.2 KiB
C++
/* SPDX-FileCopyrightText: 2025 Blender Authors
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*
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* SPDX-License-Identifier: GPL-2.0-or-later */
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/** \file
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* \ingroup sequencer
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*/
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#include <cfloat>
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#include "BLI_math_base.h"
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#include "BLI_math_vector.hh"
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#include "BLT_translation.hh"
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#include "DNA_sequence_types.h"
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#include "SEQ_modifier.hh"
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#include "SEQ_modifiertypes.hh"
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#include "UI_interface.hh"
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#include "UI_interface_layout.hh"
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#include "modifier.hh"
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namespace blender::seq {
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struct BrightContrastApplyOp {
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float mul;
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float add;
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template<typename ImageT, typename MaskT>
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void apply(ImageT *image, const MaskT *mask, IndexRange size)
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{
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for ([[maybe_unused]] int64_t i : size) {
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/* NOTE: arguably incorrect usage of "raw" values, should be un-premultiplied.
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* Not changing behavior for now, but would be good to fix someday. */
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float4 input = load_pixel_raw(image);
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float4 result;
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result = input * this->mul + this->add;
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result.w = input.w;
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apply_and_advance_mask(input, result, mask);
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store_pixel_raw(result, image);
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image += 4;
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}
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}
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};
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static void brightcontrast_apply(const StripScreenQuad & /*quad*/,
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StripModifierData *smd,
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ImBuf *ibuf,
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ImBuf *mask)
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{
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const BrightContrastModifierData *bcmd = (BrightContrastModifierData *)smd;
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BrightContrastApplyOp op;
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/* The algorithm is by Werner D. Streidt
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* (http://visca.com/ffactory/archives/5-99/msg00021.html)
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* Extracted from OpenCV `demhist.cpp`. */
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const float brightness = bcmd->bright / 100.0f;
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const float contrast = bcmd->contrast;
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float delta = contrast / 200.0f;
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if (contrast > 0) {
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op.mul = 1.0f - delta * 2.0f;
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op.mul = 1.0f / max_ff(op.mul, FLT_EPSILON);
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op.add = op.mul * (brightness - delta);
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}
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else {
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delta *= -1;
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op.mul = max_ff(1.0f - delta * 2.0f, 0.0f);
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op.add = op.mul * brightness + delta;
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}
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apply_modifier_op(op, ibuf, mask);
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}
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static void brightcontrast_panel_draw(const bContext *C, Panel *panel)
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{
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uiLayout *layout = panel->layout;
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PointerRNA *ptr = UI_panel_custom_data_get(panel);
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layout->use_property_split_set(true);
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layout->prop(ptr, "bright", UI_ITEM_NONE, std::nullopt, ICON_NONE);
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layout->prop(ptr, "contrast", UI_ITEM_NONE, std::nullopt, ICON_NONE);
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if (uiLayout *mask_input_layout = layout->panel_prop(
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C, ptr, "open_mask_input_panel", IFACE_("Mask Input")))
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{
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draw_mask_input_type_settings(C, mask_input_layout, ptr);
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}
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}
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static void brightcontrast_register(ARegionType *region_type)
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{
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modifier_panel_register(region_type, eSeqModifierType_BrightContrast, brightcontrast_panel_draw);
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}
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StripModifierTypeInfo seqModifierType_BrightContrast = {
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/*idname*/ "BrightContrast",
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/*name*/ CTX_N_(BLT_I18NCONTEXT_ID_SEQUENCE, "Brightness/Contrast"),
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/*struct_name*/ "BrightContrastModifierData",
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/*struct_size*/ sizeof(BrightContrastModifierData),
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/*init_data*/ nullptr,
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/*free_data*/ nullptr,
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/*copy_data*/ nullptr,
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/*apply*/ brightcontrast_apply,
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/*panel_register*/ brightcontrast_register,
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/*blend_write*/ nullptr,
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/*blend_read*/ nullptr,
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};
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}; // namespace blender::seq
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