From 740b10240414ae3b7c37ee21fd131ffdb296b2b9 Mon Sep 17 00:00:00 2001
From: Andrei Karas <akaras@inbox.ru>
Date: Thu, 10 Dec 2015 02:59:18 +0300
Subject: Add function for load OpenGL ES 2 shaders.

---
 src/defaults.cpp                      |  2 ++
 src/render/shaders/shadersmanager.cpp | 19 ++++++++++++++++---
 src/render/shaders/shadersmanager.h   |  5 ++++-
 src/resources/resourcemanager.cpp     | 10 +++++++---
 src/resources/resourcemanager.h       |  3 ++-
 5 files changed, 31 insertions(+), 8 deletions(-)

(limited to 'src')

diff --git a/src/defaults.cpp b/src/defaults.cpp
index a301d2323..16cab02a6 100644
--- a/src/defaults.cpp
+++ b/src/defaults.cpp
@@ -501,6 +501,8 @@ DefaultsData* getPathsDefaults()
 
     AddDEF("simpleVertexShader", "simple_vertex.glsl");
     AddDEF("simpleFragmentShader", "simple_frag.glsl");
+    AddDEF("gles2VertexShader", "gles2_vertex.glsl");
+    AddDEF("gles2FragmentShader", "gles2_frag.glsl");
 
     AddDEF("particles", "graphics/particles/");
     AddDEF("portalEffectFile", "warparea.particle.xml");
diff --git a/src/render/shaders/shadersmanager.cpp b/src/render/shaders/shadersmanager.cpp
index 345093074..c79abe2cc 100644
--- a/src/render/shaders/shadersmanager.cpp
+++ b/src/render/shaders/shadersmanager.cpp
@@ -63,7 +63,8 @@ Shader *ShadersManager::createShader(const unsigned int type,
 }
 
 ShaderProgram *ShadersManager::createProgram(const std::string &vertex,
-                                             const std::string &fragment)
+                                             const std::string &fragment,
+                                             const bool isNewShader)
 {
     Shader *const vertexShader = static_cast<Shader*>(
         resourceManager->getShader(GL_VERTEX_SHADER, vertex));
@@ -89,7 +90,10 @@ ShaderProgram *ShadersManager::createProgram(const std::string &vertex,
 
     mglAttachShader(programId, vertexShader->getShaderId());
     mglAttachShader(programId, fragmentShader->getShaderId());
-    mglBindFragDataLocation(programId, 0, "outColor");
+    if (isNewShader)
+        mglBindFragDataLocation(programId, 0, "outColor");
+    else
+        mglBindAttribLocation(programId, 0, "position");
     mglLinkProgram(programId);
     GLint isLinked = 0;
     mglGetProgramiv(programId, GL_LINK_STATUS, &isLinked);
@@ -122,7 +126,16 @@ ShaderProgram *ShadersManager::getSimpleProgram()
 {
     const std::string dir = paths.getStringValue("shaders");
     return createProgram(dir + paths.getStringValue("simpleVertexShader"),
-        dir + paths.getStringValue("simpleFragmentShader"));
+        dir + paths.getStringValue("simpleFragmentShader"),
+        true);
+}
+
+ShaderProgram *ShadersManager::getGles2Program()
+{
+    const std::string dir = paths.getStringValue("shaders");
+    return createProgram(dir + paths.getStringValue("gles2VertexShader"),
+        dir + paths.getStringValue("gles2FragmentShader"),
+        false);
 }
 
 #endif
diff --git a/src/render/shaders/shadersmanager.h b/src/render/shaders/shadersmanager.h
index 6c71dba17..b0cf56159 100644
--- a/src/render/shaders/shadersmanager.h
+++ b/src/render/shaders/shadersmanager.h
@@ -37,10 +37,13 @@ class ShadersManager final
                              const std::string &fileName) A_WARN_UNUSED;
 
         ShaderProgram *createProgram(const std::string &vertex,
-                                     const std::string &fragment)
+                                     const std::string &fragment,
+                                     const bool isNewShader)
                                      A_WARN_UNUSED;
 
         ShaderProgram *getSimpleProgram();
+
+        ShaderProgram *getGles2Program();
 };
 
 extern ShadersManager shaders;
diff --git a/src/resources/resourcemanager.cpp b/src/resources/resourcemanager.cpp
index f9f55ca03..bb566d9f4 100644
--- a/src/resources/resourcemanager.cpp
+++ b/src/resources/resourcemanager.cpp
@@ -763,6 +763,7 @@ struct ShaderProgramLoader final
 {
     const std::string vertex;
     const std::string fragment;
+    const bool isNewShader;
 
     static Resource *load(const void *const v)
     {
@@ -772,15 +773,18 @@ struct ShaderProgramLoader final
         const ShaderProgramLoader *const rl
             = static_cast<const ShaderProgramLoader *const>(v);
         ShaderProgram *const resource = shaders.createProgram(
-            rl->vertex, rl->fragment);
+            rl->vertex,
+            rl->fragment,
+            rl->isNewShader);
         return resource;
     }
 };
 
 Resource *ResourceManager::getShaderProgram(const std::string &vertex,
-                                            const std::string &fragment)
+                                            const std::string &fragment,
+                                            const bool isNewShader)
 {
-    ShaderProgramLoader rl = { vertex, fragment };
+    ShaderProgramLoader rl = { vertex, fragment, isNewShader };
     return get("program_" + vertex + " + " + fragment,
         ShaderProgramLoader::load, &rl);
 }
diff --git a/src/resources/resourcemanager.h b/src/resources/resourcemanager.h
index 13d05f0b2..329820246 100644
--- a/src/resources/resourcemanager.h
+++ b/src/resources/resourcemanager.h
@@ -181,7 +181,8 @@ class ResourceManager final
                             const std::string &name) A_WARN_UNUSED;
 
         Resource *getShaderProgram(const std::string &vertex,
-                                   const std::string &fragment) A_WARN_UNUSED;
+                                   const std::string &fragment,
+                                   const bool isNewShader) A_WARN_UNUSED;
 #endif
 
         WalkLayer *getWalkLayer(const std::string &name, Map *const map);
-- 
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