Add shader capability

Author: atupone

MSVC/build/ogl.vcxproj

@@ -276,6 +276,7 @@
       <AdditionalIncludeDirectories Condition="'$(Configuration)|$(Platform)'=='Release|x64'">%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
       <PreprocessorDefinitions Condition="'$(Configuration)|$(Platform)'=='Release|x64'">%(PreprocessorDefinitions)</PreprocessorDefinitions>
     </ClCompile>
+    <ClCompile Include="..\..\src\ogl\Shader.cxx" />
     <ClCompile Include="..\..\src\ogl\Vertex_Chunk.cxx" />
     <ClCompile Include="..\..\src\ogl\VBO_Element.cxx" />
     <ClCompile Include="..\..\src\ogl\VBO_Handler.cxx" />
@@ -292,6 +293,7 @@
     <ClInclude Include="..\..\include\OpenGLTexture.h" />
     <ClInclude Include="..\..\include\OpenGLUtils.h" />
     <ClInclude Include="..\..\include\RenderNode.h" />
+    <ClInclude Include="..\..\include\Shader.h" />
     <ClInclude Include="..\..\include\Vertex_Chunk.h" />
     <ClInclude Include="..\..\src\ogl\VBO_Element.h" />
     <ClInclude Include="..\..\src\ogl\VBO_Handler.h" />

MSVC/build/ogl.vcxproj.filters

@@ -25,6 +25,9 @@
     <ClCompile Include="..\..\src\ogl\OpenGLFramebuffer.cxx">
       <Filter>Source Files</Filter>
     </ClCompile>
+    <ClCompile Include="..\..\src\ogl\Shader.cxx">
+      <Filter>Source Files</Filter>
+    </ClCompile>
     <ClCompile Include="..\..\src\ogl\Vertex_Chunk.cxx">
       <Filter>Source Files</Filter>
     </ClCompile>
@@ -69,6 +72,9 @@
     <ClInclude Include="..\..\include\OpenGLFramebuffer.h">
       <Filter>Header Files</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\include\Shader.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
     <ClInclude Include="..\..\include\Vertex_Chunk.h">
       <Filter>Header Files</Filter>
     </ClInclude>

include/Makefile.am

@@ -105,6 +105,7 @@ noinst_HEADERS =			\
 	ServerItem.h			\
 	ServerList.h			\
 	ServerListCache.h		\
+	Shader.h			\
 	ShotUpdate.h			\
 	Singleton.h			\
 	SphereObstacle.h		\

include/Shader.h

@@ -0,0 +1,76 @@
+/* bzflag
+ * Copyright (c) 2019-2019 Tim Riker
+ *
+ * This package is free software;  you can redistribute it and/or
+ * modify it under the terms of the license found in the file
+ * named COPYING that should have accompanied this file.
+ *
+ * THIS PACKAGE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ */
+
+#pragma once
+
+// Before everything
+#include "common.h"
+
+// Syste headers
+#include <string>
+#include <glm/fwd.hpp>
+#include <deque>
+
+// Common headers
+#include "bzfgl.h"
+
+extern bool shaderDestroyed;
+
+class Shader
+{
+public:
+    Shader(const char *shaderName);
+    virtual ~Shader();
+
+// Called to initialize/destroy the shader
+    virtual void init();
+    virtual void destroy();
+
+    GLint getAttribLocation(const char *attribute_name);
+    GLint getUniformLocation(const char *uniform_name);
+    void push();
+    void pop();
+    void setUniform(GLint uniform, bool value);
+    void setUniform(GLint uniform, int value);
+    void setUniform(GLint uniform, float value);
+    void setUniform(GLint uniform, const glm::vec2 &value);
+    void setUniform(GLint uniform, const glm::vec3 &value);
+    void setUniform(GLint uniform, const glm::vec4 &value);
+    void setUniform(GLint uniform, int count, GLint *value);
+    void setUniform(GLint uniform, int count, const glm::vec3 value[]);
+    void setUniform(GLint uniform, int count, const glm::vec4 value[]);
+protected:
+    bool inited;
+private:
+// Those are callback for GL Context creation/free
+// Called by OpenGLGState::
+    static void initContext(void* data);
+    static void freeContext(void* data);
+
+    static std::deque<GLuint> programStack;
+
+    GLuint program;
+
+    GLuint create_shader(const char *filename, GLenum type);
+    void print_log(GLuint object);
+    char* file_read(const std::string &filename);
+    std::string vertexShader;
+    std::string fragmentShader;
+};
+
+// Local Variables: ***
+// mode: C++ ***
+// tab-width: 4 ***
+// c-basic-offset: 4 ***
+// indent-tabs-mode: nil ***
+// End: ***
+// ex: shiftwidth=4 tabstop=4

src/ogl/Makefile.am

@@ -23,6 +23,7 @@ libGLKit_la_SOURCES =			\
 	OpenGLTexture.cxx		\
 	OpenGLUtils.cxx			\
 	RenderNode.cxx			\
+	Shader.cxx			\
 	Vertex_Chunk.cxx                \
 	VBO_Element.h			\
 	VBO_Element.cxx                 \