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// Copyright (C) 2003 Dolphin Project.
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, version 2.0.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License 2.0 for more details.
// A copy of the GPL 2.0 should have been included with the program.
// If not, see http://www.gnu.org/licenses/
// Official SVN repository and contact information can be found at
// http://code.google.com/p/dolphin-emu/
#include "GLUtil.h"
#include "x64Emitter.h"
#include "ABI.h"
#include "MemoryUtil.h"
#include "VertexShaderGen.h"
#include "CPMemory.h"
#include "NativeVertexFormat.h"
#include "VertexManager.h"
#define COMPILED_CODE_SIZE 4096
// TODO: this guy is never initialized
u32 s_prevcomponents; // previous state set
/*
#ifdef _WIN32
#ifdef _M_IX86
#define USE_JIT
#endif
#endif
*/
// Note the use of CallCdeclFunction3I etc.
// This is a horrible hack that is necessary because in 64-bit mode, Opengl32.dll is based way, way above the 32-bit
// address space that is within reach of a CALL, and just doing &fn gives us these high uncallable addresses. So we
// want to grab the function pointers from the import table instead.
// This problem does not apply to glew functions, only core opengl32 functions.
// Here's some global state. We only use this to keep track of what we've sent to the OpenGL state
// machine.
#ifdef USE_JIT
DECLARE_IMPORT(glNormalPointer);
DECLARE_IMPORT(glVertexPointer);
DECLARE_IMPORT(glColorPointer);
DECLARE_IMPORT(glTexCoordPointer);
#endif
class GLVertexFormat : public NativeVertexFormat
{
u8 *m_compiledCode;
PortableVertexDeclaration vtx_decl;
public:
GLVertexFormat();
~GLVertexFormat();
virtual void Initialize(const PortableVertexDeclaration &_vtx_decl);
virtual void SetupVertexPointers();
virtual void EnableComponents(u32 components);
};
namespace OGL
{
NativeVertexFormat* VertexManager::CreateNativeVertexFormat()
{
return new GLVertexFormat();
}
}
GLVertexFormat::GLVertexFormat()
{
#ifdef USE_JIT
m_compiledCode = (u8 *)AllocateExecutableMemory(COMPILED_CODE_SIZE, false);
if (m_compiledCode)
memset(m_compiledCode, 0, COMPILED_CODE_SIZE);
#endif
}
GLVertexFormat::~GLVertexFormat()
{
#ifdef USE_JIT
FreeMemoryPages(m_compiledCode, COMPILED_CODE_SIZE);
m_compiledCode = 0;
#endif
}
inline GLuint VarToGL(VarType t)
{
static const GLuint lookup[5] = {
GL_BYTE, GL_UNSIGNED_BYTE, GL_SHORT, GL_UNSIGNED_SHORT, GL_FLOAT
};
return lookup[t];
}
void GLVertexFormat::Initialize(const PortableVertexDeclaration &_vtx_decl)
{
s_prevcomponents = 0;
vertex_stride = _vtx_decl.stride;
using namespace Gen;
// We will not allow vertex components causing uneven strides.
if (_vtx_decl.stride & 3)
PanicAlert("Uneven vertex stride: %i", _vtx_decl.stride);
#ifdef USE_JIT
Gen::XEmitter emit(m_compiledCode);
// Alright, we have our vertex declaration. Compile some crazy code to set it quickly using GL.
emit.ABI_EmitPrologue(6);
emit.CallCdeclFunction4_I(glVertexPointer, 3, GL_FLOAT, _vtx_decl.stride, 0);
if (_vtx_decl.num_normals >= 1)
{
emit.CallCdeclFunction3_I(glNormalPointer, VarToGL(_vtx_decl.normal_gl_type), _vtx_decl.stride, _vtx_decl.normal_offset[0]);
if (_vtx_decl.num_normals == 3) {
emit.CallCdeclFunction6((void *)glVertexAttribPointer, SHADER_NORM1_ATTRIB, _vtx_decl.normal_gl_size, VarToGL(_vtx_decl.normal_gl_type), GL_TRUE, _vtx_decl.stride, _vtx_decl.normal_offset[1]);
emit.CallCdeclFunction6((void *)glVertexAttribPointer, SHADER_NORM2_ATTRIB, _vtx_decl.normal_gl_size, VarToGL(_vtx_decl.normal_gl_type), GL_TRUE, _vtx_decl.stride, _vtx_decl.normal_offset[2]);
}
}
for (int i = 0; i < 2; i++)
{
if (_vtx_decl.color_offset[i] != -1)
{
if (i == 0)
emit.CallCdeclFunction4_I(glColorPointer, 4, GL_UNSIGNED_BYTE, _vtx_decl.stride, _vtx_decl.color_offset[i]);
else
emit.CallCdeclFunction4((void *)glSecondaryColorPointer, 4, GL_UNSIGNED_BYTE, _vtx_decl.stride, _vtx_decl.color_offset[i]);
}
}
for (int i = 0; i < 8; i++)
{
if (_vtx_decl.texcoord_offset[i] != -1)
{
int id = GL_TEXTURE0 + i;
#ifdef _M_X64
#ifdef _MSC_VER
emit.MOV(32, R(RCX), Imm32(id));
#else
emit.MOV(32, R(RDI), Imm32(id));
#endif
#else
emit.ABI_AlignStack(1 * 4);
emit.PUSH(32, Imm32(id));
#endif
emit.CALL((void *)glClientActiveTexture);
#ifndef _M_X64
#ifdef _WIN32
// don't inc stack on windows, stdcall
#else
emit.ABI_RestoreStack(1 * 4);
#endif
#endif
emit.CallCdeclFunction4_I(
glTexCoordPointer, _vtx_decl.texcoord_size[i], VarToGL(_vtx_decl.texcoord_gl_type[i]),
_vtx_decl.stride, _vtx_decl.texcoord_offset[i]);
}
}
if (_vtx_decl.posmtx_offset != -1)
emit.CallCdeclFunction6((void *)glVertexAttribPointer, SHADER_POSMTX_ATTRIB, 4, GL_UNSIGNED_BYTE, GL_FALSE, _vtx_decl.stride, _vtx_decl.posmtx_offset);
emit.ABI_EmitEpilogue(6);
if (emit.GetCodePtr() - (u8*)m_compiledCode > COMPILED_CODE_SIZE)
Crash();
#endif
this->vtx_decl = _vtx_decl;
}
void GLVertexFormat::SetupVertexPointers() {
// Cast a pointer to compiled code to a pointer to a function taking no parameters, through a (void *) cast first to
// get around type checking errors, and call it.
#ifdef USE_JIT
((void (*)())(void*)m_compiledCode)();
#else
glVertexPointer(3, GL_FLOAT, vtx_decl.stride, VertexManager::s_pBaseBufferPointer);
if (vtx_decl.num_normals >= 1) {
glNormalPointer(VarToGL(vtx_decl.normal_gl_type), vtx_decl.stride, (void *)(VertexManager::s_pBaseBufferPointer + vtx_decl.normal_offset[0]));
if (vtx_decl.num_normals == 3) {
glVertexAttribPointer(SHADER_NORM1_ATTRIB, vtx_decl.normal_gl_size, VarToGL(vtx_decl.normal_gl_type), GL_TRUE, vtx_decl.stride, (void *)(VertexManager::s_pBaseBufferPointer + vtx_decl.normal_offset[1]));
glVertexAttribPointer(SHADER_NORM2_ATTRIB, vtx_decl.normal_gl_size, VarToGL(vtx_decl.normal_gl_type), GL_TRUE, vtx_decl.stride, (void *)(VertexManager::s_pBaseBufferPointer + vtx_decl.normal_offset[2]));
}
}
for (int i = 0; i < 2; i++) {
if (vtx_decl.color_offset[i] != -1) {
if (i == 0)
glColorPointer(4, GL_UNSIGNED_BYTE, vtx_decl.stride, (void *)(VertexManager::s_pBaseBufferPointer + vtx_decl.color_offset[i]));
else {
glSecondaryColorPointer(4, GL_UNSIGNED_BYTE, vtx_decl.stride, (void *)(VertexManager::s_pBaseBufferPointer + vtx_decl.color_offset[i]));
}
}
}
for (int i = 0; i < 8; i++) {
if (vtx_decl.texcoord_offset[i] != -1) {
int id = GL_TEXTURE0 + i;
glClientActiveTexture(id);
glTexCoordPointer(vtx_decl.texcoord_size[i], VarToGL(vtx_decl.texcoord_gl_type[i]),
vtx_decl.stride, (void *)(VertexManager::s_pBaseBufferPointer + vtx_decl.texcoord_offset[i]));
}
}
if (vtx_decl.posmtx_offset != -1) {
glVertexAttribPointer(SHADER_POSMTX_ATTRIB, 4, GL_UNSIGNED_BYTE, GL_FALSE, vtx_decl.stride, (void *)(VertexManager::s_pBaseBufferPointer + vtx_decl.posmtx_offset));
}
#endif
}
void GLVertexFormat::EnableComponents(u32 components)
{
if (s_prevcomponents != components)
{
VertexManager::Flush();
// matrices
if ((components & VB_HAS_POSMTXIDX) != (s_prevcomponents & VB_HAS_POSMTXIDX))
{
if (components & VB_HAS_POSMTXIDX)
glEnableVertexAttribArray(SHADER_POSMTX_ATTRIB);
else
glDisableVertexAttribArray(SHADER_POSMTX_ATTRIB);
}
// normals
if ((components & VB_HAS_NRM0) != (s_prevcomponents & VB_HAS_NRM0))
{
if (components & VB_HAS_NRM0)
glEnableClientState(GL_NORMAL_ARRAY);
else
glDisableClientState(GL_NORMAL_ARRAY);
}
if ((components & VB_HAS_NRM1) != (s_prevcomponents & VB_HAS_NRM1))
{
if (components & VB_HAS_NRM1) {
glEnableVertexAttribArray(SHADER_NORM1_ATTRIB);
glEnableVertexAttribArray(SHADER_NORM2_ATTRIB);
}
else {
glDisableVertexAttribArray(SHADER_NORM1_ATTRIB);
glDisableVertexAttribArray(SHADER_NORM2_ATTRIB);
}
}
// color
for (int i = 0; i < 2; ++i)
{
if ((components & (VB_HAS_COL0 << i)) != (s_prevcomponents & (VB_HAS_COL0 << i)))
{
if (components & (VB_HAS_COL0 << i))
glEnableClientState(i ? GL_SECONDARY_COLOR_ARRAY : GL_COLOR_ARRAY);
else
glDisableClientState(i ? GL_SECONDARY_COLOR_ARRAY : GL_COLOR_ARRAY);
}
}
// tex
for (int i = 0; i < 8; ++i)
{
if ((components & (VB_HAS_UV0 << i)) != (s_prevcomponents & (VB_HAS_UV0 << i)))
{
glClientActiveTexture(GL_TEXTURE0 + i);
if (components & (VB_HAS_UV0 << i))
glEnableClientState(GL_TEXTURE_COORD_ARRAY);
else
glDisableClientState(GL_TEXTURE_COORD_ARRAY);
}
}
s_prevcomponents = components;
}
}
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