[core] move platform/gl.hpp to gl/gl.hpp

1 files changed, 159 insertions, 0 deletions

diff --git a/include/mbgl/gl/gl.hpp b/include/mbgl/gl/gl.hpp
new file mode 100644
index 0000000000..59a3bf2ef2
--- /dev/null
+++ b/include/mbgl/gl/gl.hpp
@@ -0,0 +1,159 @@
+#ifndef MBGL_GL_GL
+#define MBGL_GL_GL
+
+//#define GL_TRACK
+
+#include <string>
+#include <stdexcept>
+#include <vector>
+
+#ifdef GL_TRACK
+#include <iostream>
+#endif
+
+#if __APPLE__
+    #include "TargetConditionals.h"
+    #if TARGET_OS_IPHONE
+        #include <OpenGLES/ES2/gl.h>
+        #include <OpenGLES/ES2/glext.h>
+    #elif TARGET_IPHONE_SIMULATOR
+        #include <OpenGLES/ES2/gl.h>
+        #include <OpenGLES/ES2/glext.h>
+    #elif TARGET_OS_MAC
+        #include <OpenGL/OpenGL.h>
+        #include <OpenGL/gl.h>
+    #else
+        #error Unsupported Apple platform
+    #endif
+#elif __ANDROID__ || MBGL_USE_GLES2
+    #define GL_GLEXT_PROTOTYPES
+    #include <GLES2/gl2.h>
+    #include <GLES2/gl2ext.h>
+#else
+    #define GL_GLEXT_PROTOTYPES
+    #include <GL/gl.h>
+    #include <GL/glext.h>
+#endif
+
+namespace mbgl {
+namespace gl {
+
+#ifdef GL_TRACK
+    typedef void (*GLDEBUGPROC)(GLenum source,
+                                GLenum type,
+                                GLuint id,
+                                GLenum severity,
+                                GLsizei length,
+                                const GLchar *message,
+                                const void *userParam);
+    
+    template <class... Args> void mbx_trapExtension(const char *name, Args... args);
+    
+    void mbx_trapExtension(const char *);
+    void mbx_trapExtension(const char *, GLint, const char *);
+    void mbx_trapExtension(const char *, GLsizei, GLuint *);
+    void mbx_trapExtension(const char *, GLsizei, const GLuint *);
+    void mbx_trapExtension(const char *, GLenum, GLenum, GLenum, GLsizei, const GLuint *, GLboolean);
+    void mbx_trapExtension(const char *, GLenum, GLuint, GLsizei, const GLchar *);
+    void mbx_trapExtension(const char *, GLDEBUGPROC, const void *);
+    void mbx_trapExtension(const char *, GLuint, GLuint, GLuint, GLuint, GLint, const char *, const void*);
+    void mbx_trapExtension(const char *name, GLuint array);
+#endif
+    
+struct Error : ::std::runtime_error {
+    inline Error(GLenum err, const std::string &msg) : ::std::runtime_error(msg), code(err) {};
+    const GLenum code;
+};
+
+void checkError(const char *cmd, const char *file, int line);
+
+#if defined(DEBUG)
+#define MBGL_CHECK_ERROR(cmd) ([&]() { struct __MBGL_C_E { inline ~__MBGL_C_E() { ::mbgl::gl::checkError(#cmd, __FILE__, __LINE__); } } __MBGL_C_E; return cmd; }())
+#else
+#define MBGL_CHECK_ERROR(cmd) (cmd)
+#endif
+
+class ExtensionFunctionBase {
+public:
+    static std::vector<ExtensionFunctionBase*>& functions();
+    typedef std::pair<const char *, const char *> Probe;
+    std::vector<Probe> probes;
+    void (*ptr)();
+#ifdef GL_TRACK
+    const char *foundName;
+#endif
+};
+
+template <class>
+class ExtensionFunction;
+
+template <class R, class... Args>
+class ExtensionFunction<R (Args...)> : protected ExtensionFunctionBase {
+public:
+    ExtensionFunction(std::initializer_list<Probe> probes_) {
+        probes = probes_;
+        ExtensionFunctionBase::functions().push_back(this);
+    }
+
+    explicit operator bool() const {
+        return ptr;
+    }
+
+    R operator()(Args... args) const {
+#ifdef GL_TRACK
+        mbx_trapExtension(foundName, args...);
+#endif
+        return (*reinterpret_cast<R (*)(Args...)>(ptr))(std::forward<Args>(args)...);
+    }
+};
+
+using glProc = void (*)();
+void InitializeExtensions(glProc (*getProcAddress)(const char *));
+
+} // namespace gl
+} // namespace mbgl
+
+#ifdef GL_ES_VERSION_2_0
+    #define glClearDepth glClearDepthf
+    #define glDepthRange glDepthRangef
+#endif
+
+#ifdef GL_TRACK
+#define glBindTexture mbx_glBindTexture
+#define glDeleteTexture mbx_glDeleteTexture
+#define glTexImage2D mbx_glTexImage2D
+#define glClear mbx_glClear
+#define glShaderSource mbx_glShaderSource
+#define glBufferData mbx_glBufferData
+#define glBindBuffer mbx_glBindBuffer
+#define glDeleteBuffers mbx_glDeleteBuffers
+
+void mbx_glDeleteBuffers(GLsizei n,
+                     const GLuint * buffers);
+void mbx_glBindBuffer(GLenum target,
+                      GLuint buffer);
+void mbx_glBufferData(GLenum target,
+                      GLsizeiptr size,
+                      const GLvoid * data,
+                      GLenum usage);
+void mbx_glShaderSource(GLuint shader,
+                        GLsizei count,
+                        const GLchar * const *string,
+                        const GLint *length);
+void mbx_glClear(GLbitfield mask);
+void mbx_glBindTexture(	GLenum target,
+                       GLuint texture);
+void mbx_glDeleteTextures(GLsizei n,
+                          const GLuint * textures);
+void mbx_glTexImage2D(GLenum target,
+                      GLint level,
+                      GLint internalformat,
+                      GLsizei width,
+                      GLsizei height,
+                      GLint border,
+                      GLenum format,
+                      GLenum type,
+                      const GLvoid * data);
+#endif
+
+#endif