Work on fixing histogram generation.

modules/material_maker/algos/mm_algos.cpp

@@ -5664,13 +5664,13 @@ Ref<Image> MMAlgos::generate_histogram(const Ref<Image> &input, const int textur
 
 	for (int x = 0; x < size.x; ++x) {
 		for (int y = 0; y < size.y; ++y) {
-			float e = 1.0 / size.y;
+			float uv_y = 1.0 / size.y * y;
 
 			Color sum = Color();
 
-			for (float yy = 0.5 * e; yy < 1.0; yy += e) {
-				Color sic = scaled_input->get_pixel(x, yy * size.y);
-				sic -= Color(e, e, e, e);
+			for (int yy = 0; yy < size.y; ++yy) {
+				Color sic = scaled_input->get_pixel(x, yy);
+				sic -= Color(uv_y, uv_y, uv_y, uv_y);
 
 				sic.r = MAX(0, 1.0 - 16.0 * ABS(sic.r));
 				sic.g = MAX(0, 1.0 - 16.0 * ABS(sic.g));
@@ -5714,7 +5714,7 @@ Ref<Image> MMAlgos::generate_histogram(const Ref<Image> &input, const int textur
 	Ref<Image> step_2;
 	step_2.instance();
 	step_2->copy_internals_from(step_1);
-	step_2->resize(texture_size, 2);
+	step_2->resize(texture_size, 1);
 
 	scaled_input->lock();
 	step_2->lock();
@@ -5723,11 +5723,10 @@ Ref<Image> MMAlgos::generate_histogram(const Ref<Image> &input, const int textur
 
 	for (int x = 0; x < size.x; ++x) {
 		for (int y = 0; y < size.y; ++y) {
-			float e = 1.0 / size.y;
 			Color sum = Color();
 
-			for (float yy = 0.5 * e; yy < 1.0; yy += e) {
-				Color sic = scaled_input->get_pixel(yy * size.y, x);
+			for (int yy = 0; yy < size.y; ++yy) {
+				Color sic = scaled_input->get_pixel(yy, x);
 
 				sum += sic;
 			}
@@ -5790,35 +5789,40 @@ Ref<Image> MMAlgos::generate_histogram(const Ref<Image> &input, const int textur
 
 		for (int y = 0; y < size.y; ++y) {
 			float e = 1.0 / size.y;
-			float uv_y = e * y;
+			float uv_y = e * static_cast<float>(y);
 
 			if (ABS(MMAlgos::fractf(uv_y + gradient_width)) < 2.0 * gradient_width) {
 				result->set_pixel(x, y, Color(uv_x, uv_x, uv_x, 1));
 			} else {
 				Color highest = Color(0, 0, 0, 0);
 
-				for (float xx = 0.5 * uv_1_x; xx < 1.0; xx += uv_1_x) {
-					Color sic = step_2->get_pixel(xx * uv_1_x, 0);
+				for (int xx = 0; xx < size.x; ++xx) {
+					Color sic = step_2->get_pixel(xx, 0);
 
-					highest.r = MAX(highest.r, sic.r);
-					highest.g = MAX(highest.g, sic.g);
-					highest.b = MAX(highest.b, sic.b);
-					highest.a = MAX(highest.a, sic.a);
+					if (highest < sic) {
+						highest = sic;
+					}
 				}
 
-				Color raw_value = step_2->get_pixel(x * uv_1_x, 0);
+				Color raw_value = step_2->get_pixel(x, 0);
 
+				//vec4 value = step(vec4(1.0 - gradient_width - UV.y) * highest / (1.0 - 2.0 * gradient_width), raw_value);
 				Vector4 highest_v4 = Vector4(highest.r, highest.g, highest.b, highest.a);
-				float gv = 1.0 - gradient_width - uv_y;
-				Vector4 value = Vector4(gv, gv, gv, gv) * highest_v4 / (1.0 - 2.0 * gradient_width);
+
+				//-- [1.0 - gradient_width - UV.y]
+				float gvu = 1.0 - gradient_width - uv_y;
+				float gv = 1.0 - 2.0 * gradient_width;
+				Vector4 value = Vector4(gvu, gvu, gvu, gvu) * highest_v4 / Vector4(gv, gv, gv, gv);
 
 				value.x = step(value.x, raw_value.r);
 				value.y = step(value.y, raw_value.g);
 				value.z = step(value.z, raw_value.b);
 				value.w = step(value.w, raw_value.a);
 
+				//float alpha = step(2.0 * gradient_width, dot(value, vec4(1.0)));
 				float alpha = step(2.0 * gradient_width, value.dot(Vector4(1, 1, 1, 1)));
 
+				//COLOR = vec4(mix(value.rgb, vec3(0.5), 0.3 * value.a), alpha);
 				Vector3 val3 = Vector3(value.x, value.y, value.z);
 				val3 = val3.linear_interpolate(Vector3(0.5, 0.5, 0.5), 0.3 * value.w);
 

modules/material_maker/editor/mm_graph_node.cpp

@@ -195,7 +195,7 @@ int MMGraphNode::add_slot_tones() {
 
 	MMTonesEditor *te = memnew(MMTonesEditor);
 	int slot_idx = add_slot(MMNodeUniversalProperty::SLOT_TYPE_NONE, MMNodeUniversalProperty::SLOT_TYPE_NONE, "", "", te);
-	te->set_value(_node);
+	te->set_value(_material, _node);
 	//ge.texture = _node.call(getter, _material, slot_idx);
 	//properties[slot_idx].append(ge.texture);
 	return slot_idx;

modules/material_maker/editor/widgets/tones_editor/tones_editor.cpp

@@ -4,6 +4,7 @@
 #include "scene/resources/texture.h"
 
 #include "../../../nodes/filter/tones.h"
+#include "../../../nodes/mm_material.h"
 
 #include "scene/gui/button.h"
 #include "scene/gui/option_button.h"
@@ -13,7 +14,9 @@
 
 #include "tones_editor_cursor.h"
 
-void MMTonesEditor::set_value(const Ref<MMTones> &v) {
+void MMTonesEditor::set_value(const Ref<MMMaterial> &material, const Ref<MMTones> &v) {
+	_material = material;
+
 	if (_node == v) {
 		return;
 	}
@@ -254,11 +257,12 @@ MMTonesEditor::~MMTonesEditor() {
 }
 
 void MMTonesEditor::on_input_property_changed() {
-	if (!_node.is_valid()) {
+	if (!_node.is_valid() || !_material.is_valid()) {
 		_histogram_tr->set_texture(make_default_histogram());
 		return;
 	}
 
+	//Ref<Image> img = _node->render_original_image(_material);
 	Ref<Image> img = _node->get_image()->get_active_image();
 
 	if (!img.is_valid()) {

modules/material_maker/editor/widgets/tones_editor/tones_editor.h

@@ -10,6 +10,7 @@ class OptionButton;
 class TextureRect;
 class ImageTexture;
 class MMTonesEditorCursor;
+class MMMaterial;
 
 class MMTonesEditor : public VBoxContainer {
 	GDCLASS(MMTonesEditor, VBoxContainer);
@@ -27,7 +28,7 @@ public:
 		HISTOGRAM_IMAGE_SIZE = 128,
 	};
 
-	void set_value(const Ref<MMTones> &v);
+	void set_value(const Ref<MMMaterial> &material, const Ref<MMTones> &v);
 
 	enum ParameterTypes {
 		PARAMETER_TYPE_IN_MIN = 0,
@@ -61,6 +62,7 @@ protected:
 
 	static void _bind_methods();
 
+	Ref<MMMaterial> _material;
 	Ref<MMTones> _node;
 
 	Modes _current_mode;

modules/material_maker/nodes/filter/tones.cpp

@@ -3,6 +3,7 @@
 
 #include "../../algos/mm_algos.h"
 #include "../../editor/mm_graph_node.h"
+#include "core/io/image.h"
 #include "../mm_material.h"
 
 Ref<MMNodeUniversalProperty> MMTones::get_input() {
@@ -114,6 +115,29 @@ Color MMTones::_get_value_for(const Vector2 &uv, const int pseed) {
 	return MMAlgos::adjust_levels(c, _in_min, _in_mid, _in_max, _out_min, _out_max);
 }
 
+Ref<Image> MMTones::render_original_image(const Ref<MMMaterial> &material) {
+	Ref<Image> image;
+	image.instance();
+
+	image->create(material->image_size.x, material->image_size.y, false, Image::FORMAT_RGBA8);
+	image->lock();
+
+	float w = image->get_width();
+	float h = image->get_height();
+
+	for (int x = 0; x < image->get_width(); ++x) { //x in range(image.get_width())
+
+		for (int y = 0; y < image->get_height(); ++y) { //y in range(image.get_height())
+			Vector2 v = Vector2(x / w, y / h);
+			Color col = input->get_value(v);
+			image->set_pixel(x, y, col);
+		}
+	}
+
+	image->unlock();
+	return image;
+}
+
 MMTones::MMTones() {
 	_in_max = Color(1, 1, 1, 1);
 	_in_mid = Color(0.5, 0.5, 0.5, 0.5);

modules/material_maker/nodes/filter/tones.h

@@ -4,6 +4,9 @@
 #include "../mm_node.h"
 #include "../mm_node_universal_property.h"
 
+class MMMaterial;
+class Image;
+
 class MMTones : public MMNode {
 	GDCLASS(MMTones, MMNode);
 
@@ -38,6 +41,8 @@ public:
 	void _render(const Ref<MMMaterial> &material);
 	Color _get_value_for(const Vector2 &uv, const int pseed);
 
+	Ref<Image> render_original_image(const Ref<MMMaterial> &material);
+
 	MMTones();
 	~MMTones();