doom3quest/Projects/Android/jni/Doom3Quest/VrCompositor.h

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/************************************************************************************
Filename : VrCompositor.h
*************************************************************************************/
#include "VrInput.h"
#define CHECK_GL_ERRORS
#ifdef CHECK_GL_ERRORS
static const char * GlErrorString( GLenum error )
{
switch ( error )
{
case GL_NO_ERROR: return "GL_NO_ERROR";
case GL_INVALID_ENUM: return "GL_INVALID_ENUM";
case GL_INVALID_VALUE: return "GL_INVALID_VALUE";
case GL_INVALID_OPERATION: return "GL_INVALID_OPERATION";
case GL_INVALID_FRAMEBUFFER_OPERATION: return "GL_INVALID_FRAMEBUFFER_OPERATION";
case GL_OUT_OF_MEMORY: return "GL_OUT_OF_MEMORY";
default: return "unknown";
}
}
static void GLCheckErrors( int line )
{
for ( int i = 0; i < 10; i++ )
{
const GLenum error = glGetError();
if ( error == GL_NO_ERROR )
{
break;
}
ALOGE( "GL error on line %d: %s", line, GlErrorString( error ) );
}
}
#define GL( func ) func; GLCheckErrors( __LINE__ );
#else // CHECK_GL_ERRORS
#define GL( func ) func;
#endif // CHECK_GL_ERRORS
/*
================================================================================
ovrFramebuffer
================================================================================
*/
typedef struct
{
int Width;
int Height;
int Multisamples;
int TextureSwapChainLength;
int ProcessingTextureSwapChainIndex;
int ReadyTextureSwapChainIndex;
ovrTextureSwapChain * ColorTextureSwapChain;
GLuint * DepthBuffers;
GLuint * FrameBuffers;
bool UseMultiview;
} ovrFramebuffer;
void ovrFramebuffer_SetCurrent( ovrFramebuffer * frameBuffer );
void ovrFramebuffer_Destroy( ovrFramebuffer * frameBuffer );
void ovrFramebuffer_SetNone();
void ovrFramebuffer_Resolve( ovrFramebuffer * frameBuffer );
void ovrFramebuffer_Advance( ovrFramebuffer * frameBuffer );
void ovrFramebuffer_ClearEdgeTexels( ovrFramebuffer * frameBuffer );
/*
================================================================================
ovrRenderer
================================================================================
*/
typedef struct
{
ovrFramebuffer FrameBuffer;
ovrMatrix4f ProjectionMatrix;
int NumBuffers;
} ovrRenderer;
void ovrRenderer_Clear( ovrRenderer * renderer );
void ovrRenderer_Create( int width, int height, ovrRenderer * renderer, const ovrJava * java );
void ovrRenderer_Destroy( ovrRenderer * renderer );
/*
================================================================================
renderState
================================================================================
*/
typedef struct
{
GLint VertexBuffer;
GLint IndexBuffer;
GLint VertexArrayObject;
GLint Program;
GLint VertexShader;
GLint FragmentShader;
} renderState;
void getCurrentRenderState( renderState * state);
void restoreRenderState( renderState * state );
/*
================================================================================
ovrGeometry
================================================================================
*/
typedef struct
{
GLint Index;
GLint Size;
GLenum Type;
GLboolean Normalized;
GLsizei Stride;
const GLvoid * Pointer;
} ovrVertexAttribPointer;
#define MAX_VERTEX_ATTRIB_POINTERS 3
typedef struct
{
GLuint VertexBuffer;
GLuint IndexBuffer;
GLuint VertexArrayObject;
int VertexCount;
int IndexCount;
ovrVertexAttribPointer VertexAttribs[MAX_VERTEX_ATTRIB_POINTERS];
} ovrGeometry;
/*
================================================================================
ovrProgram
================================================================================
*/
#define MAX_PROGRAM_UNIFORMS 8
#define MAX_PROGRAM_TEXTURES 8
typedef struct
{
GLuint Program;
GLuint VertexShader;
GLuint FragmentShader;
// These will be -1 if not used by the program.
GLint UniformLocation[MAX_PROGRAM_UNIFORMS]; // ProgramUniforms[].name
GLint UniformBinding[MAX_PROGRAM_UNIFORMS]; // ProgramUniforms[].name
GLint Textures[MAX_PROGRAM_TEXTURES]; // Texture%i
} ovrProgram;
/*
================================================================================
ovrScene
================================================================================
*/
typedef struct
{
bool CreatedScene;
//Proper renderer for stereo rendering to the cylinder layer
ovrRenderer CylinderRenderer;
int CylinderWidth;
int CylinderHeight;
} ovrScene;
void ovrScene_Clear( ovrScene * scene );
void ovrScene_Create( int width, int height, ovrScene * scene, const ovrJava * java );
/*
================================================================================
ovrRenderer
================================================================================
*/
ovrLayerProjection2 ovrRenderer_RenderGroundPlaneToEyeBuffer( ovrRenderer * renderer, const ovrJava * java,
const ovrScene * scene, const ovrTracking2 * tracking );
ovrLayerProjection2 ovrRenderer_RenderToEyeBuffer( ovrRenderer * renderer, const ovrJava * java,
const ovrTracking2 * tracking );
ovrLayerCylinder2 BuildCylinderLayer( ovrRenderer * cylinderRenderer,
const int textureWidth, const int textureHeight,
const ovrTracking2 * tracking, float rotateYaw );
;