From f52db94b51e505c13ded001976590136bfadc04e Mon Sep 17 00:00:00 2001
From: touky <huet.benjamin@gmail.com>
Date: Tue, 22 Nov 2016 20:46:24 -0500
Subject: [PATCH] imgui extension

small imgui extension
scene palette shader crashfix
---
 src/lolimgui.cpp | 22 ++++++++++++++++++++++
 src/lolimgui.h   | 18 +++++++++++++++++-
 src/scene.cpp    |  7 +++++--
 3 files changed, 44 insertions(+), 3 deletions(-)

diff --git a/src/lolimgui.cpp b/src/lolimgui.cpp
index 10ad19bf..57d246b0 100644
--- a/src/lolimgui.cpp
+++ b/src/lolimgui.cpp
@@ -18,6 +18,28 @@
 
 using namespace lol;
 
+//Imgui extension ---------------------------------------------------------------------------------
+namespace ImGui
+{
+    IMGUI_API void SetNextWindowSizeAndDock(const ImVec2& size, ImGuiSetDock dock, ImGuiSetCond cond)
+    {
+        vec2 video_size = vec2(Video::GetSize());
+        ImVec2 pos = ImVec2();
+
+        switch (dock)
+        {
+        case ImGuiSetDock_TopLeft: pos = ImVec2(0, 0); break;
+        case ImGuiSetDock_TopRight: pos = ImVec2(video_size.x - size.x, 0); break;
+        case ImGuiSetDock_BottomLeft: pos = ImVec2(0, video_size.y - size.y); break;
+        case ImGuiSetDock_BottomRight: pos = ImVec2(video_size.x - size.x, video_size.y - size.y); break;
+        }
+
+        ImGui::SetNextWindowPos(pos, cond);
+        ImGui::SetNextWindowSize(size, cond);
+    }
+}
+
+//LolImGui ----------------------------------------------------------------------------------------
 #define Line(s) ((s) + "\n")
 
 //-----------------------------------------------------------------------------
diff --git a/src/lolimgui.h b/src/lolimgui.h
index fb707b9d..379e0c82 100644
--- a/src/lolimgui.h
+++ b/src/lolimgui.h
@@ -14,10 +14,26 @@
 
 #include "imgui.h"
 
+//Imgui extension ---------------------------------------------------------------------------------
+typedef int ImGuiSetDock;           // condition flags for Set*()           // enum ImGuiSetCond_
+
+enum ImGuiSetDock_
+{
+    ImGuiSetDock_TopLeft = 0,
+    ImGuiSetDock_TopRight = 1,
+    ImGuiSetDock_BottomLeft = 2,
+    ImGuiSetDock_BottomRight = 3,
+};
+
+namespace ImGui
+{
+    IMGUI_API void SetNextWindowSizeAndDock(const ImVec2& size, ImGuiSetDock dock, ImGuiSetCond cond = 0);
+}
+
+//LolImGui ----------------------------------------------------------------------------------------
 namespace lol
 {
 
-//LolImGui --------------------------------------------------------------------
 class LolImGui : public Entity
 {
     typedef Entity super;
diff --git a/src/scene.cpp b/src/scene.cpp
index bbfcc9e5..c33adef5 100644
--- a/src/scene.cpp
+++ b/src/scene.cpp
@@ -723,7 +723,7 @@ void Scene::render_tiles() // XXX: rename to Blit()
 
     if (!data->m_tile_api.m_shader)
         data->m_tile_api.m_shader = Shader::Create(LOLFX_RESOURCE_NAME(gpu_tile));
-    if (!data->m_tile_api.m_palette_shader)
+    if (!data->m_tile_api.m_palette_shader && data->m_tile_api.m_palettes.count())
         data->m_tile_api.m_palette_shader = Shader::Create(LOLFX_RESOURCE_NAME(gpu_palette));
 
     for (int p = 0; p < 2; p++)
@@ -749,7 +749,7 @@ void Scene::render_tiles() // XXX: rename to Blit()
         shader->SetUniform(uni_mat, mat4(1.f));
 
         uni_tex = shader->GetUniformLocation("u_texture");
-        uni_pal = data->m_tile_api.m_palette_shader->GetUniformLocation("u_palette");
+        uni_pal = data->m_tile_api.m_palette_shader ? data->m_tile_api.m_palette_shader->GetUniformLocation("u_palette") : ShaderUniform();
         uni_texsize = shader->GetUniformLocation("u_texsize");
 
         for (int buf = 0, i = 0, n; i < tiles.count(); i = n, buf += 2)
@@ -809,6 +809,9 @@ void Scene::render_tiles() // XXX: rename to Blit()
         tiles.empty();
 
         shader->Unbind();
+
+        if (!data->m_tile_api.m_palette_shader)
+            break;
     }
 
 #if (defined LOL_USE_GLEW || defined HAVE_GL_2X) && !defined HAVE_GLES_2X