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/* $Id$ */
/** @file
* VBox crOpenGL: GLSL related state info
*/
/*
* Copyright (C) 2012 Oracle Corporation
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* you can redistribute it and/or modify it under the terms of the GNU
* General Public License (GPL) as published by the Free Software
* Foundation, in version 2 as it comes in the "COPYING" file of the
* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
*/
#ifndef CR_STATE_GLSL_H
#define CR_STATE_GLSL_H
#include "cr_hash.h"
#include "state/cr_statetypes.h"
#include "state/cr_statefuncs.h"
#ifdef __cplusplus
extern "C" {
#endif
/* We can't go the "easy" way of just extracting all the required data when taking snapshots.
Shader objects might be modified *after* program linkage and wouldn't affect program until it's relinked.
So we have to keep track of shaders statuses right before each program was linked as well as their "current" status.
*/
/*@todo: check rare case when successfully linked and active program is relinked with failure*/
typedef struct {
GLuint id, hwid;
GLenum type; /*GL_VERTEX_SHADER or GL_FRAGMENT_SHADER*/
GLchar* source; /*NULL after context loading unless in program's "active" hash*/
GLboolean compiled, deleted;
GLuint refCount; /*valid only for shaders in CRGLSLState's hash*/
} CRGLSLShader;
typedef struct {
GLchar* name;
GLuint index;
} CRGLSLAttrib;
/*Note: active state will hold copies of shaders while current state references shaders in the CRGLSLState hashtable*/
/*@todo: probably don't need a hashtable here*/
typedef struct {
CRHashTable *attachedShaders;
CRGLSLAttrib *pAttribs; /*several names could be bound to the same index*/
GLuint cAttribs;
} CRGLSLProgramState;
typedef struct{
GLchar *name;
GLenum type;
GLvoid *data;
#ifdef IN_GUEST
GLint location;
#endif
} CRGLSLUniform;
typedef struct {
GLuint id, hwid;
GLboolean validated, linked, deleted;
CRGLSLProgramState activeState, currentState;
CRGLSLUniform *pUniforms;
GLuint cUniforms;
#ifdef IN_GUEST
GLboolean bUniformsSynced; /*uniforms info is updated since last link program call.*/
#endif
} CRGLSLProgram;
typedef struct {
CRHashTable *shaders;
CRHashTable *programs;
CRGLSLProgram *activeProgram;
/* Indicates that we have to resend GLSL data to GPU on first glMakeCurrent call with owning context */
GLboolean bResyncNeeded;
} CRGLSLState;
DECLEXPORT(void) STATE_APIENTRY crStateGLSLInit(CRContext *ctx);
DECLEXPORT(void) STATE_APIENTRY crStateGLSLDestroy(CRContext *ctx);
DECLEXPORT(void) STATE_APIENTRY crStateGLSLSwitch(CRContext *from, CRContext *to);
DECLEXPORT(GLuint) STATE_APIENTRY crStateGetShaderHWID(GLuint id);
DECLEXPORT(GLuint) STATE_APIENTRY crStateGetProgramHWID(GLuint id);
DECLEXPORT(GLuint) STATE_APIENTRY crStateGLSLProgramHWIDtoID(GLuint hwid);
DECLEXPORT(GLuint) STATE_APIENTRY crStateGLSLShaderHWIDtoID(GLuint hwid);
DECLEXPORT(GLint) STATE_APIENTRY crStateGetUniformSize(GLenum type);
DECLEXPORT(GLboolean) STATE_APIENTRY crStateIsIntUniform(GLenum type);
DECLEXPORT(GLuint) STATE_APIENTRY crStateCreateShader(GLuint id, GLenum type);
DECLEXPORT(GLuint) STATE_APIENTRY crStateCreateProgram(GLuint id);
DECLEXPORT(GLboolean) STATE_APIENTRY crStateIsProgramUniformsCached(GLuint program);
#ifdef IN_GUEST
DECLEXPORT(void) STATE_APIENTRY crStateGLSLProgramCacheUniforms(GLuint program, GLsizei cbData, GLvoid *pData);
#else
DECLEXPORT(void) STATE_APIENTRY crStateGLSLProgramCacheUniforms(GLuint program, GLsizei maxcbData, GLsizei *cbData, GLvoid *pData);
#endif
#ifdef __cplusplus
}
#endif
#endif /* CR_STATE_GLSL_H */
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