fix stroke preview zoom, implement dest pick on ppbr export

data/layout.xml

@@ -59,14 +59,15 @@
                 <button id="header-open" text="Open" grow="1" height="100%"/>
                 <button id="header-clear" text="Clear" grow="1" height="100%"/>
               </node>
-              <border os="win,mac,android" color=".4" grow="1" pad="5" margin="10 0 0 0" justify="center">
+              <border os="win,osx,android" color=".4" grow="1" pad="5" margin="10 0 0 0" justify="center">
                 <node dir="row" align="center">
                   <checkbox id="export-data" width="30" aspect-ratio="1" margin="0 5 0 0"/>
                   <text text="Export data"/>
                   <node grow="1"/>
-                  <button os="mac" id="pick-dest" text="Pick dest." pad="5"/>
+                  <button os="osx" id="pick-dest" text="Pick dest." pad="5"/>
                 </node>
                 <text color=".7" text-wrap-width="256" text="Save the generated preview images to a separete folder."/>
+                <text id="dest-path" margin="5 0 0 0" text-wrap-width="256"/>
               </border>
             </node>
             <node grow="1" dir="col">

src/app_dialogs.cpp

@@ -606,6 +606,7 @@ void App::dialog_ppbr_export()
         info.email = dialog->txt_email->m_text;
         info.descr = dialog->txt_descr->m_text;
         info.header_image = dialog->m_header_image;
+        info.dest_path = dialog->m_dest_path;
         if (dialog->export_check)
             info.export_data = dialog->export_check->checked;
 #if __IOS__

src/node_dialog_export_ppbr.cpp

@@ -28,6 +28,8 @@ void NodeDialogExportPPBR::init()
 void NodeDialogExportPPBR::init_controls()
 {
     m_title = find<NodeText>("title");
+    m_dest_path_txt = find<NodeText>("dest-path");
+    m_dest_path_txt->SetVisibility(false);
     btn_ok = find<NodeButton>("btn-ok");
     btn_cancel = find<NodeButton>("btn-cancel");
     btn_cancel->on_click = [this](Node*) {
@@ -47,6 +49,15 @@ void NodeDialogExportPPBR::init_controls()
     btn_header_gen->on_click = [this] (Node*) {
         App::I->message_box("WIP", "This feature is not yet implemented.");
     };
+    btn_pick_dest = find<NodeButton>("pick-dest");
+    btn_pick_dest->on_click = [this] (Node*) {
+        App::I->pick_dir([this](std::string path){
+            m_dest_path = path;
+            m_dest_path_txt->set_text(("Dest: " + path).c_str());
+            m_dest_path_txt->SetVisibility(true);
+            export_check->set_value(true);
+        });
+    };
     img_header = find<NodeImageTexture>("header-tex");
     txt_header_descr = find<NodeText>("header-descr");
     txt_author = find<NodeTextInput>("info-author");

src/node_dialog_export_ppbr.h

@@ -15,7 +15,9 @@ public:
     NodeButton* btn_header_open;
     NodeButton* btn_header_clear;
     NodeButton* btn_header_gen;
+    NodeButton* btn_pick_dest;
     NodeText* m_title;
+    NodeText* m_dest_path_txt;
     NodeImageTexture* img_header;
     std::shared_ptr<Image> m_header_image;
     NodeText* txt_header_descr;
@@ -24,6 +26,7 @@ public:
     NodeTextInput* txt_url;
     NodeTextInput* txt_email;
     NodeCheckBox* export_check;
+    std::string m_dest_path;
     virtual Node* clone_instantiate() const override;
     virtual void clone_finalize(Node* dest) const override;
     virtual void init() override;

src/node_panel_brush.cpp

@@ -698,9 +698,14 @@ bool NodePanelBrushPreset::export_ppbr(const std::string& path_in, const PPBRInf
     auto base = m[1].str();
     auto name = m[2].str();
     auto ext = m[3].str();
-    std::string out_path = base + "/" + name + "_data";
 
-    bool path_created = info_data.export_data ? Asset::create_dir(out_path) : false;
+#if __OSX__
+    std::string out_path = info_data.dest_path + "/" + name + "_data";
+#else
+    std::string out_path = base + "/" + name + "_data";
+#endif
+
+    bool path_created = info_data.export_data && !out_path.empty() ? Asset::create_dir(out_path) : false;
     
     std::ofstream f(path, std::ios::binary);
     if (f.good())

src/node_panel_brush.h

@@ -96,6 +96,7 @@ public:
         std::string descr;
         std::shared_ptr<Image> header_image;
         bool export_data;
+        std::string dest_path;
     };
 
     Node* m_container;

src/node_stroke_preview.cpp

@@ -192,7 +192,7 @@ glm::vec4 NodeStrokePreview::stroke_draw_samples(std::array<vertex_t, 4>& P, Tex
     return glm::vec4(tex_pos, tex_pos + tex_sz);
 }
 
-std::vector<NodeStrokePreview::StrokeFrame> NodeStrokePreview::stroke_draw_compute(Stroke& stroke) const
+std::vector<NodeStrokePreview::StrokeFrame> NodeStrokePreview::stroke_draw_compute(Stroke& stroke, float zoom) const
 {
     std::vector<StrokeFrame> ret;
     StrokeSample prev = stroke.m_prev_sample;
@@ -232,11 +232,11 @@ std::vector<NodeStrokePreview::StrokeFrame> NodeStrokePreview::stroke_draw_compu
         glm::vec2 mixer_bb_max(0, 0);
         for (int j = 0; j < 4; j++)
         {
-            auto p = (xy(prev.pos) + App::I->zoom * s.scale * off_mix[j] * glm::orientate2(-s.angle));
+            auto p = (xy(prev.pos) + zoom * s.scale * off_mix[j] * glm::orientate2(-s.angle));
             mixer_bb_min = glm::max({ 0, 0 }, glm::min(mixer_bb_min, p));
             mixer_bb_max = glm::min(mixer_sz, glm::max(mixer_bb_max, p));
 
-            B[j].pos = glm::vec4(xy(s.pos) + App::I->zoom * s.scale * off[j] * glm::orientate2(-s.angle) - glm::vec2(0, 1), 1, 1);
+            B[j].pos = glm::vec4(xy(s.pos) + zoom * s.scale * off[j] * glm::orientate2(-s.angle) - glm::vec2(0, 1), 1, 1);
             B[j].uvs2 = p / mixer_sz;
         }
 
@@ -260,6 +260,8 @@ void NodeStrokePreview::draw_stroke_immediate()
     GLfloat cc[4];
     glGetIntegerv(GL_VIEWPORT, vp);
     glGetFloatv(GL_COLOR_CLEAR_VALUE, cc);
+    
+    float zoom = root()->m_zoom;
 
     glm::vec2 size = { m_rtt.getWidth(), m_rtt.getHeight() };
     glm::mat4 ortho_proj = glm::ortho<float>(0, size.x, 0, size.y, -1, 1);
@@ -315,13 +317,13 @@ void NodeStrokePreview::draw_stroke_immediate()
 
     {
         float min_pad = size.x * 0.05f;
-        float pad = (5.f + glm::max(glm::min(m_stroke.m_max_size, m_brush->m_tip_size) / 2.f, min_pad)) * App::I->zoom;
+        float pad = (5.f + glm::max(glm::min(m_stroke.m_max_size, m_brush->m_tip_size) / 2.f, min_pad)) * zoom;
         if (b->m_tip_size_pressure)
-            pad = min_pad * App::I->zoom;
+            pad = min_pad * zoom;
         if (!glm::isnan(m_pad_override))
             pad = m_pad_override;
-        float w = m_size.x * App::I->zoom;
+        float w = m_size.x * zoom;
-        float h = m_size.y * App::I->zoom;
+        float h = m_size.y * zoom;
         std::vector<glm::vec2> kp = {
             { pad, h / 2.f },
             { w / 2.f, 0 },
@@ -374,7 +376,7 @@ void NodeStrokePreview::draw_stroke_immediate()
         dual_brush->m_tip_texture ?
             dual_brush->m_tip_texture->bind() :
             glBindTexture(GL_TEXTURE_2D, 0);
-        auto frames_dual = stroke_draw_compute(m_dual_stroke);
+        auto frames_dual = stroke_draw_compute(m_dual_stroke, zoom);
         for (auto& f : frames_dual)
         {
             ShaderManager::u_vec4(kShaderUniform::Col, { 0, 0, 0, 1 });
@@ -407,7 +409,7 @@ void NodeStrokePreview::draw_stroke_immediate()
         glBindTexture(GL_TEXTURE_2D, 0);
     glActiveTexture(GL_TEXTURE3);
     m_rtt_mixer.bindTexture();
-    auto frames = stroke_draw_compute(m_stroke);
+    auto frames = stroke_draw_compute(m_stroke, zoom);
     m_rtt.clear();
     for (auto& f : frames)
     {

src/node_stroke_preview.h

@@ -50,7 +50,7 @@ public:
     void stroke_draw_mix(const glm::vec2& bb_min, const glm::vec2& bb_sz);
     // return rect {origin, size}
     glm::vec4 stroke_draw_samples(std::array<vertex_t, 4>& P, Texture2D& blend_tex);
-    std::vector<StrokeFrame> stroke_draw_compute(Stroke& stroke) const;
+    std::vector<StrokeFrame> stroke_draw_compute(Stroke& stroke, float zoom) const;
     void draw_stroke();
     void draw_stroke_immediate();
     Image render_to_image();