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/* SPDX-License-Identifier: GPL-2.0-or-later
* Copyright 2006 Blender Foundation. All rights reserved. */
/** \file
* \ingroup cmpnodes
*/
#include "BLI_math_vec_types.hh"
#include "UI_interface.h"
#include "UI_resources.h"
#include "GPU_shader.h"
#include "GPU_state.h"
#include "GPU_texture.h"
#include "COM_node_operation.hh"
#include "COM_utilities.hh"
#include "node_composite_util.hh"
/* **************** COMPOSITE ******************** */
namespace blender::nodes::node_composite_composite_cc {
static void cmp_node_composite_declare(NodeDeclarationBuilder &b)
{
b.add_input<decl::Color>(N_("Image")).default_value({0.0f, 0.0f, 0.0f, 1.0f});
b.add_input<decl::Float>(N_("Alpha")).default_value(1.0f).min(0.0f).max(1.0f);
b.add_input<decl::Float>(N_("Z")).default_value(1.0f).min(0.0f).max(1.0f);
}
static void node_composit_buts_composite(uiLayout *layout, bContext * /*C*/, PointerRNA *ptr)
{
uiItemR(layout, ptr, "use_alpha", UI_ITEM_R_SPLIT_EMPTY_NAME, nullptr, ICON_NONE);
}
using namespace blender::realtime_compositor;
class CompositeOperation : public NodeOperation {
public:
using NodeOperation::NodeOperation;
void execute() override
{
const Result &image = get_input("Image");
const Result &alpha = get_input("Alpha");
if (image.is_single_value() && alpha.is_single_value()) {
execute_clear();
}
else if (ignore_alpha()) {
execute_ignore_alpha();
}
else if (!node().input_by_identifier("Alpha")->is_logically_linked()) {
execute_copy();
}
else {
execute_set_alpha();
}
}
/* Executes when all inputs are single values, in which case, the output texture can just be
* cleared to the appropriate color. */
void execute_clear()
{
const Result &image = get_input("Image");
const Result &alpha = get_input("Alpha");
float4 color = image.get_color_value();
if (ignore_alpha()) {
color.w = 1.0f;
}
else if (node().input_by_identifier("Alpha")->is_logically_linked()) {
color.w = alpha.get_float_value();
}
GPU_texture_clear(context().get_output_texture(), GPU_DATA_FLOAT, color);
}
/* Executes when the alpha channel of the image is ignored. */
void execute_ignore_alpha()
{
GPUShader *shader = shader_manager().get("compositor_convert_color_to_opaque");
GPU_shader_bind(shader);
const Result &image = get_input("Image");
image.bind_as_texture(shader, "input_tx");
GPUTexture *output_texture = context().get_output_texture();
const int image_unit = GPU_shader_get_texture_binding(shader, "output_img");
GPU_texture_image_bind(output_texture, image_unit);
compute_dispatch_threads_at_least(shader, compute_domain().size);
image.unbind_as_texture();
GPU_texture_image_unbind(output_texture);
GPU_shader_unbind();
}
/* Executes when the image texture is written with no adjustments and can thus be copied directly
* to the output texture. */
void execute_copy()
{
const Result &image = get_input("Image");
/* Make sure any prior writes to the texture are reflected before copying it. */
GPU_memory_barrier(GPU_BARRIER_TEXTURE_UPDATE);
GPU_texture_copy(context().get_output_texture(), image.texture());
}
/* Executes when the alpha channel of the image is set as the value of the input alpha. */
void execute_set_alpha()
{
GPUShader *shader = shader_manager().get("compositor_set_alpha");
GPU_shader_bind(shader);
const Result &image = get_input("Image");
image.bind_as_texture(shader, "image_tx");
const Result &alpha = get_input("Alpha");
alpha.bind_as_texture(shader, "alpha_tx");
GPUTexture *output_texture = context().get_output_texture();
const int image_unit = GPU_shader_get_texture_binding(shader, "output_img");
GPU_texture_image_bind(output_texture, image_unit);
compute_dispatch_threads_at_least(shader, compute_domain().size);
image.unbind_as_texture();
alpha.unbind_as_texture();
GPU_texture_image_unbind(output_texture);
GPU_shader_unbind();
}
/* If true, the alpha channel of the image is set to 1, that is, it becomes opaque. If false, the
* alpha channel of the image is retained, but only if the alpha input is not linked. If the
* alpha input is linked, it the value of that input will be used as the alpha of the image. */
bool ignore_alpha()
{
return bnode().custom2 & CMP_NODE_OUTPUT_IGNORE_ALPHA;
}
/* The operation domain have the same dimensions of the output without any transformations. */
Domain compute_domain() override
{
return Domain(context().get_output_size());
}
};
static NodeOperation *get_compositor_operation(Context &context, DNode node)
{
return new CompositeOperation(context, node);
}
} // namespace blender::nodes::node_composite_composite_cc
void register_node_type_cmp_composite()
{
namespace file_ns = blender::nodes::node_composite_composite_cc;
static bNodeType ntype;
cmp_node_type_base(&ntype, CMP_NODE_COMPOSITE, "Composite", NODE_CLASS_OUTPUT);
ntype.declare = file_ns::cmp_node_composite_declare;
ntype.draw_buttons = file_ns::node_composit_buts_composite;
ntype.get_compositor_operation = file_ns::get_compositor_operation;
ntype.flag |= NODE_PREVIEW;
ntype.no_muting = true;
nodeRegisterType(&ntype);
}
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