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OpenSubdiv/examples/glViewer/glViewer.cpp
jcowles 214f86a7c0 Fix GLEW for Core profile, minor cleanup 
We will need to find a solution for Ignacio's older setup, but this at least
fixes the other fallout.

 * Use glewIsSupported instead of glewGetExtension
 * Convert tabs to spaces
 * Remove GLEW static caching (they only get called once)
2015-05-29 15:56:36 -07:00

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//
// Copyright 2013 Pixar
//
// Licensed under the Apache License, Version 2.0 (the "Apache License")
// with the following modification; you may not use this file except in
// compliance with the Apache License and the following modification to it:
// Section 6. Trademarks. is deleted and replaced with:
//
// 6. Trademarks. This License does not grant permission to use the trade
// names, trademarks, service marks, or product names of the Licensor
// and its affiliates, except as required to comply with Section 4(c) of
// the License and to reproduce the content of the NOTICE file.
//
// You may obtain a copy of the Apache License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the Apache License with the above modification is
// distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied. See the Apache License for the specific
// language governing permissions and limitations under the Apache License.
//
#if defined(__APPLE__)
#if defined(OSD_USES_GLEW)
#include <GL/glew.h>
#else
#include <OpenGL/gl3.h>
#endif
#define GLFW_INCLUDE_GL3
#define GLFW_NO_GLU
#else
#include <stdlib.h>
#include <GL/glew.h>
#if defined(WIN32)
#include <GL/wglew.h>
#endif
#endif
#include <GLFW/glfw3.h>
GLFWwindow* g_window=0;
GLFWmonitor* g_primary=0;
#include <far/error.h>
#include <osd/cpuEvaluator.h>
#include <osd/cpuGLVertexBuffer.h>
#ifdef OPENSUBDIV_HAS_OPENMP
#include <osd/ompEvaluator.h>
#endif
#ifdef OPENSUBDIV_HAS_TBB
#include <osd/tbbEvaluator.h>
#endif
#ifdef OPENSUBDIV_HAS_OPENCL
#include <osd/clGLVertexBuffer.h>
#include <osd/clEvaluator.h>
#include "../common/clDeviceContext.h"
CLDeviceContext g_clDeviceContext;
#endif
#ifdef OPENSUBDIV_HAS_CUDA
#include <osd/cudaGLVertexBuffer.h>
#include <osd/cudaEvaluator.h>
#include "../common/cudaDeviceContext.h"
CudaDeviceContext g_cudaDeviceContext;
#endif
#ifdef OPENSUBDIV_HAS_GLSL_TRANSFORM_FEEDBACK
#include <osd/glXFBEvaluator.h>
#include <osd/glVertexBuffer.h>
#endif
#ifdef OPENSUBDIV_HAS_GLSL_COMPUTE
#include <osd/glComputeEvaluator.h>
#include <osd/glVertexBuffer.h>
#endif
#include <osd/glMesh.h>
#include <osd/glLegacyGregoryPatchTable.h>
OpenSubdiv::Osd::GLMeshInterface *g_mesh = NULL;
OpenSubdiv::Osd::GLLegacyGregoryPatchTable *g_legacyGregoryPatchTable = NULL;
#include "../../regression/common/vtr_utils.h"
#include "../common/stopwatch.h"
#include "../common/simple_math.h"
#include "../common/glHud.h"
#include "../common/glUtils.h"
#include "../common/objAnim.h"
#include "../common/patchColors.h"
#include "../common/glShaderCache.h"
#include <osd/glslPatchShaderSource.h>
/* Function to get the correct shader file based on the opengl version.
The implentation varies depending if glew is available or not. In case
is available the capabilities are queried during execution and the correct
source is returned. If glew in not available during compile time the version
is determined*/
static const char *shaderSource(){
#if not defined(OSD_USES_GLEW)
static const char *res =
#if defined(GL_ARB_tessellation_shader) || defined(GL_VERSION_4_0)
#include "shader.gen.h"
#else
#include "shader_gl3.gen.h"
#endif
;
#else
static const char *res = NULL;
if (!res){
static const char *gen =
#include "shader.gen.h"
;
static const char *gen3 =
#include "shader_gl3.gen.h"
;
//Determine the shader file to use. Since some opengl implementations
//define that an extension is available but not an implementation
//for it you cannnot trust in the glew header definitions to know that is
//available, but you need to query it during runtime.
if (GLUtils::SupportsAdaptiveTessellation())
res = gen;
else
res = gen3;
}
#endif
return res;
}
#include <cfloat>
#include <vector>
#include <iostream>
#include <fstream>
#include <sstream>
enum KernelType { kCPU = 0,
kOPENMP = 1,
kTBB = 2,
kCUDA = 3,
kCL = 4,
kGLSL = 5,
kGLSLCompute = 6 };
enum DisplayStyle { kWire = 0,
kShaded,
kWireShaded,
kVaryingColor,
kInterleavedVaryingColor,
kFaceVaryingColor };
enum EndCap { kEndCapNone = 0,
kEndCapBSplineBasis,
kEndCapGregoryBasis,
kEndCapLegacyGregory };
enum HudCheckBox { kHUD_CB_DISPLAY_CAGE_EDGES,
kHUD_CB_DISPLAY_CAGE_VERTS,
kHUD_CB_ANIMATE_VERTICES,
kHUD_CB_DISPLAY_PATCH_COLOR,
kHUD_CB_VIEW_LOD,
kHUD_CB_FRACTIONAL_SPACING,
kHUD_CB_PATCH_CULL,
kHUD_CB_FREEZE,
kHUD_CB_DISPLAY_PATCH_COUNTS,
kHUD_CB_ADAPTIVE,
kHUD_CB_SINGLE_CREASE_PATCH };
int g_currentShape = 0;
ObjAnim const * g_objAnim = 0;
bool g_axis=true;
int g_frame = 0,
g_repeatCount = 0;
float g_animTime = 0;
// GUI variables
int g_fullscreen = 0,
g_freeze = 0,
g_displayStyle = kWireShaded,
g_adaptive = 1,
g_endCap = kEndCapBSplineBasis,
g_singleCreasePatch = 1,
g_drawCageEdges = 1,
g_drawCageVertices = 0,
g_mbutton[3] = {0, 0, 0},
g_running = 1;
int g_displayPatchColor = 1,
g_screenSpaceTess = 1,
g_fractionalSpacing = 1,
g_patchCull = 0,
g_displayPatchCounts = 1;
float g_rotate[2] = {0, 0},
g_dolly = 5,
g_pan[2] = {0, 0},
g_center[3] = {0, 0, 0},
g_size = 0;
int g_prev_x = 0,
g_prev_y = 0;
int g_width = 1024,
g_height = 1024;
GLhud g_hud;
// performance
float g_cpuTime = 0;
float g_gpuTime = 0;
Stopwatch g_fpsTimer;
// geometry
std::vector<float> g_orgPositions,
g_positions;
Scheme g_scheme;
int g_level = 2;
int g_tessLevel = 1;
int g_tessLevelMin = 1;
int g_kernel = kCPU;
float g_moveScale = 0.0f;
GLuint g_queries[2] = {0, 0};
GLuint g_transformUB = 0,
g_transformBinding = 0,
g_tessellationUB = 0,
g_tessellationBinding = 0,
g_lightingUB = 0,
g_lightingBinding = 0;
struct Transform {
float ModelViewMatrix[16];
float ProjectionMatrix[16];
float ModelViewProjectionMatrix[16];
} g_transformData;
GLuint g_vao = 0;
GLuint g_cageEdgeVAO = 0,
g_cageEdgeVBO = 0,
g_cageVertexVAO = 0,
g_cageVertexVBO = 0;
std::vector<int> g_coarseEdges;
std::vector<float> g_coarseEdgeSharpness;
std::vector<float> g_coarseVertexSharpness;
struct Program
{
GLuint program;
GLuint uniformModelViewProjectionMatrix;
GLuint attrPosition;
GLuint attrColor;
} g_defaultProgram;
// XXX:
// this struct meant to be used as a stopgap entity until we fully implement
// face-varying stuffs into patch table.
//
struct FVarData
{
FVarData() :
textureBuffer(0) {
}
~FVarData() {
Release();
}
void Release() {
if (textureBuffer)
glDeleteTextures(1, &textureBuffer);
textureBuffer = 0;
}
void Create(OpenSubdiv::Far::PatchTable const *patchTable,
int fvarWidth, std::vector<float> const & fvarSrcData) {
Release();
OpenSubdiv::Far::ConstIndexArray indices =
patchTable->GetFVarPatchesValues(0);
// expand fvardata to per-patch array
std::vector<float> data;
data.reserve(indices.size() * fvarWidth);
for (int fvert = 0; fvert < (int)indices.size(); ++fvert) {
int index = indices[fvert] * fvarWidth;
for (int i = 0; i < fvarWidth; ++i) {
data.push_back(fvarSrcData[index++]);
}
}
GLuint buffer;
glGenBuffers(1, &buffer);
glBindBuffer(GL_ARRAY_BUFFER, buffer);
glBufferData(GL_ARRAY_BUFFER, data.size()*sizeof(float),
&data[0], GL_STATIC_DRAW);
glGenTextures(1, &textureBuffer);
glBindTexture(GL_TEXTURE_BUFFER, textureBuffer);
glTexBuffer(GL_TEXTURE_BUFFER, GL_R32F, buffer);
glBindTexture(GL_TEXTURE_BUFFER, 0);
glBindTexture(GL_ARRAY_BUFFER, 0);
glDeleteBuffers(1, &buffer);
}
GLuint textureBuffer;
} g_fvarData;
static void
checkGLErrors(std::string const & where = "")
{
GLuint err;
while ((err = glGetError()) != GL_NO_ERROR) {
std::cerr << "GL error: "
<< (where.empty() ? "" : where + " ")
<< err << "\n";
}
}
static bool
linkDefaultProgram() {
const std::string glsl_version = GLUtils::GetShaderVersionInclude();
static const std::string vsSrc =
glsl_version +
"in vec3 position;\n"
"in vec3 color;\n"
"out vec4 fragColor;\n"
"uniform mat4 ModelViewProjectionMatrix;\n"
"void main() {\n"
" fragColor = vec4(color, 1);\n"
" gl_Position = ModelViewProjectionMatrix * "
" vec4(position, 1);\n"
"}\n";
static const std::string fsSrc =
glsl_version +
"in vec4 fragColor;\n"
"out vec4 color;\n"
"void main() {\n"
" color = fragColor;\n"
"}\n";
GLuint program = glCreateProgram();
GLuint vertexShader = GLUtils::CompileShader(GL_VERTEX_SHADER, vsSrc.c_str());
GLuint fragmentShader = GLUtils::CompileShader(GL_FRAGMENT_SHADER, fsSrc.c_str());
glAttachShader(program, vertexShader);
glAttachShader(program, fragmentShader);
glLinkProgram(program);
GLint status;
glGetProgramiv(program, GL_LINK_STATUS, &status);
if (status == GL_FALSE) {
GLint infoLogLength;
glGetProgramiv(program, GL_INFO_LOG_LENGTH, &infoLogLength);
char *infoLog = new char[infoLogLength];
glGetProgramInfoLog(program, infoLogLength, NULL, infoLog);
printf("%s\n", infoLog);
delete[] infoLog;
exit(1);
}
g_defaultProgram.program = program;
g_defaultProgram.uniformModelViewProjectionMatrix =
glGetUniformLocation(program, "ModelViewProjectionMatrix");
g_defaultProgram.attrPosition = glGetAttribLocation(program, "position");
g_defaultProgram.attrColor = glGetAttribLocation(program, "color");
return true;
}
//------------------------------------------------------------------------------
#include "init_shapes.h"
//------------------------------------------------------------------------------
static void
updateGeom() {
std::vector<float> vertex, varying;
int nverts=0, stride=g_displayStyle == kInterleavedVaryingColor ? 7 : 3;
if (g_objAnim and g_currentShape==0) {
nverts = g_objAnim->GetShape()->GetNumVertices(),
vertex.resize(nverts*stride);
if (g_displayStyle == kVaryingColor) {
varying.resize(nverts*4);
}
g_objAnim->InterpolatePositions(g_animTime, &vertex[0], stride);
if (g_drawCageEdges or g_drawCageVertices) {
g_positions.resize(nverts*3);
for (int i=0; i<nverts; ++i) {
int ofs = i * stride;
g_positions[i*3+0] = vertex[ofs+0];
g_positions[i*3+1] = vertex[ofs+1];
g_positions[i*3+2] = vertex[ofs+2];
}
}
if (g_displayStyle == kVaryingColor or
g_displayStyle == kInterleavedVaryingColor) {
const float *p = &g_objAnim->GetShape()->verts[0];
for (int i = 0; i < nverts; ++i) {
if (g_displayStyle == kInterleavedVaryingColor) {
int ofs = i * stride;
vertex[ofs + 0] = p[1];
vertex[ofs + 1] = p[2];
vertex[ofs + 2] = p[0];
vertex[ofs + 3] = 0.0f;
p += 3;
}
if (g_displayStyle == kVaryingColor) {
varying.push_back(p[2]);
varying.push_back(p[1]);
varying.push_back(p[0]);
varying.push_back(1);
p += 3;
}
}
}
} else {
nverts = (int)g_orgPositions.size() / 3;
vertex.reserve(nverts*stride);
if (g_displayStyle == kVaryingColor) {
varying.reserve(nverts*4);
}
const float *p = &g_orgPositions[0];
float r = sin(g_frame*0.001f) * g_moveScale;
for (int i = 0; i < nverts; ++i) {
//float move = 0.05f*cosf(p[0]*20+g_frame*0.01f);
float ct = cos(p[2] * r);
float st = sin(p[2] * r);
g_positions[i*3+0] = p[0]*ct + p[1]*st;
g_positions[i*3+1] = -p[0]*st + p[1]*ct;
g_positions[i*3+2] = p[2];
p += 3;
}
p = &g_orgPositions[0];
const float *pp = &g_positions[0];
for (int i = 0; i < nverts; ++i) {
vertex.push_back(pp[0]);
vertex.push_back(pp[1]);
vertex.push_back(pp[2]);
if (g_displayStyle == kInterleavedVaryingColor) {
vertex.push_back(p[1]);
vertex.push_back(p[2]);
vertex.push_back(p[0]);
vertex.push_back(1.0f);
p += 3;
}
if (g_displayStyle == kVaryingColor) {
varying.push_back(p[2]);
varying.push_back(p[1]);
varying.push_back(p[0]);
varying.push_back(1);
p += 3;
}
pp += 3;
}
}
g_mesh->UpdateVertexBuffer(&vertex[0], 0, nverts);
if (g_displayStyle == kVaryingColor)
g_mesh->UpdateVaryingBuffer(&varying[0], 0, nverts);
Stopwatch s;
s.Start();
g_mesh->Refine();
s.Stop();
g_cpuTime = float(s.GetElapsed() * 1000.0f);
s.Start();
g_mesh->Synchronize();
s.Stop();
g_gpuTime = float(s.GetElapsed() * 1000.0f);
}
//------------------------------------------------------------------------------
static const char *
getKernelName(int kernel) {
if (kernel == kCPU)
return "CPU";
else if (kernel == kOPENMP)
return "OpenMP";
else if (kernel == kTBB)
return "TBB";
else if (kernel == kCUDA)
return "Cuda";
else if (kernel == kGLSL)
return "GLSL TransformFeedback";
else if (kernel == kGLSLCompute)
return "GLSL Compute";
else if (kernel == kCL)
return "OpenCL";
return "Unknown";
}
//------------------------------------------------------------------------------
static void
createOsdMesh(ShapeDesc const & shapeDesc, int level, int kernel, Scheme scheme=kCatmark) {
using namespace OpenSubdiv;
typedef Far::ConstIndexArray IndexArray;
bool doAnim = g_objAnim and g_currentShape==0;
Shape const * shape = 0;
if (doAnim) {
shape = g_objAnim->GetShape();
} else {
shape = Shape::parseObj(shapeDesc.data.c_str(), shapeDesc.scheme, shapeDesc.isLeftHanded);
}
// create Vtr mesh (topology)
Sdc::SchemeType sdctype = GetSdcType(*shape);
Sdc::Options sdcoptions = GetSdcOptions(*shape);
Far::TopologyRefiner * refiner =
Far::TopologyRefinerFactory<Shape>::Create(*shape,
Far::TopologyRefinerFactory<Shape>::Options(sdctype, sdcoptions));
// save coarse topology (used for coarse mesh drawing)
OpenSubdiv::Far::TopologyLevel const & refBaseLevel = refiner->GetLevel(0);
int nedges = refBaseLevel.GetNumEdges(),
nverts = refBaseLevel.GetNumVertices();
g_coarseEdges.resize(nedges*2);
g_coarseEdgeSharpness.resize(nedges);
g_coarseVertexSharpness.resize(nverts);
for(int i=0; i<nedges; ++i) {
IndexArray verts = refBaseLevel.GetEdgeVertices(i);
g_coarseEdges[i*2 ]=verts[0];
g_coarseEdges[i*2+1]=verts[1];
g_coarseEdgeSharpness[i]=refBaseLevel.GetEdgeSharpness(i);
}
for(int i=0; i<nverts; ++i) {
g_coarseVertexSharpness[i]=refBaseLevel.GetVertexSharpness(i);
}
g_orgPositions=shape->verts;
g_positions.resize(g_orgPositions.size(),0.0f);
delete g_mesh;
g_mesh = NULL;
g_scheme = scheme;
// Adaptive refinement currently supported only for catmull-clark scheme
bool doAdaptive = (g_adaptive!=0 and g_scheme==kCatmark),
interleaveVarying = g_displayStyle == kInterleavedVaryingColor,
doSingleCreasePatch = (g_singleCreasePatch!=0 and g_scheme==kCatmark);
Osd::MeshBitset bits;
bits.set(Osd::MeshAdaptive, doAdaptive);
bits.set(Osd::MeshUseSingleCreasePatch, doSingleCreasePatch);
bits.set(Osd::MeshInterleaveVarying, interleaveVarying);
bits.set(Osd::MeshFVarData, g_displayStyle == kFaceVaryingColor);
bits.set(Osd::MeshEndCapBSplineBasis, g_endCap == kEndCapBSplineBasis);
bits.set(Osd::MeshEndCapGregoryBasis, g_endCap == kEndCapGregoryBasis);
bits.set(Osd::MeshEndCapLegacyGregory, g_endCap == kEndCapLegacyGregory);
int numVertexElements = 3;
int numVaryingElements =
(g_displayStyle == kVaryingColor or interleaveVarying) ? 4 : 0;
if (kernel == kCPU) {
g_mesh = new Osd::Mesh<Osd::CpuGLVertexBuffer,
Far::StencilTable,
Osd::CpuEvaluator,
Osd::GLPatchTable>(
refiner,
numVertexElements,
numVaryingElements,
level, bits);
#ifdef OPENSUBDIV_HAS_OPENMP
} else if (kernel == kOPENMP) {
g_mesh = new Osd::Mesh<Osd::CpuGLVertexBuffer,
Far::StencilTable,
Osd::OmpEvaluator,
Osd::GLPatchTable>(
refiner,
numVertexElements,
numVaryingElements,
level, bits);
#endif
#ifdef OPENSUBDIV_HAS_TBB
} else if (kernel == kTBB) {
g_mesh = new Osd::Mesh<Osd::CpuGLVertexBuffer,
Far::StencilTable,
Osd::TbbEvaluator,
Osd::GLPatchTable>(
refiner,
numVertexElements,
numVaryingElements,
level, bits);
#endif
#ifdef OPENSUBDIV_HAS_OPENCL
} else if(kernel == kCL) {
// CLKernel
static Osd::EvaluatorCacheT<Osd::CLEvaluator> clEvaluatorCache;
g_mesh = new Osd::Mesh<Osd::CLGLVertexBuffer,
Osd::CLStencilTable,
Osd::CLEvaluator,
Osd::GLPatchTable,
CLDeviceContext>(
refiner,
numVertexElements,
numVaryingElements,
level, bits,
&clEvaluatorCache,
&g_clDeviceContext);
#endif
#ifdef OPENSUBDIV_HAS_CUDA
} else if(kernel == kCUDA) {
g_mesh = new Osd::Mesh<Osd::CudaGLVertexBuffer,
Osd::CudaStencilTable,
Osd::CudaEvaluator,
Osd::GLPatchTable>(
refiner,
numVertexElements,
numVaryingElements,
level, bits);
#endif
#ifdef OPENSUBDIV_HAS_GLSL_TRANSFORM_FEEDBACK
} else if(kernel == kGLSL) {
static Osd::EvaluatorCacheT<Osd::GLXFBEvaluator> glXFBEvaluatorCache;
g_mesh = new Osd::Mesh<Osd::GLVertexBuffer,
Osd::GLStencilTableTBO,
Osd::GLXFBEvaluator,
Osd::GLPatchTable>(
refiner,
numVertexElements,
numVaryingElements,
level, bits,
&glXFBEvaluatorCache);
#endif
#ifdef OPENSUBDIV_HAS_GLSL_COMPUTE
} else if(kernel == kGLSLCompute) {
static Osd::EvaluatorCacheT<Osd::GLComputeEvaluator> glComputeEvaluatorCache;
g_mesh = new Osd::Mesh<Osd::GLVertexBuffer,
Osd::GLStencilTableSSBO,
Osd::GLComputeEvaluator,
Osd::GLPatchTable>(
refiner,
numVertexElements,
numVaryingElements,
level, bits,
&glComputeEvaluatorCache);
#endif
} else {
printf("Unsupported kernel %s\n", getKernelName(kernel));
}
if (g_displayStyle == kFaceVaryingColor and shape->HasUV()) {
std::vector<float> fvarData;
InterpolateFVarData(*refiner, *shape, fvarData);
// set fvardata to texture buffer
g_fvarData.Create(g_mesh->GetFarPatchTable(),
shape->GetFVarWidth(), fvarData);
}
// legacy gregory
delete g_legacyGregoryPatchTable;
g_legacyGregoryPatchTable = NULL;
if (g_endCap == kEndCapLegacyGregory) {
g_legacyGregoryPatchTable =
Osd::GLLegacyGregoryPatchTable::Create(g_mesh->GetFarPatchTable());
}
if (not doAnim) {
delete shape;
}
// compute model bounding
float min[3] = { FLT_MAX, FLT_MAX, FLT_MAX};
float max[3] = {-FLT_MAX, -FLT_MAX, -FLT_MAX};
for (size_t i=0; i <g_orgPositions.size()/3; ++i) {
for(int j=0; j<3; ++j) {
float v = g_orgPositions[i*3+j];
min[j] = std::min(min[j], v);
max[j] = std::max(max[j], v);
}
}
for (int j=0; j<3; ++j) {
g_center[j] = (min[j] + max[j]) * 0.5f;
g_size += (max[j]-min[j])*(max[j]-min[j]);
}
g_size = sqrtf(g_size);
g_tessLevelMin = 1;
g_tessLevel = std::max(g_tessLevel,g_tessLevelMin);
updateGeom();
// -------- VAO
glBindVertexArray(g_vao);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, g_mesh->GetPatchTable()->GetPatchIndexBuffer());
glBindBuffer(GL_ARRAY_BUFFER, g_mesh->BindVertexBuffer());
glEnableVertexAttribArray(0);
if (g_displayStyle == kVaryingColor) {
glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, sizeof (GLfloat) * 3, 0);
glBindBuffer(GL_ARRAY_BUFFER, g_mesh->BindVaryingBuffer());
glEnableVertexAttribArray(1);
glVertexAttribPointer(1, 4, GL_FLOAT, GL_FALSE, sizeof (GLfloat) * 4, 0);
} else if (g_displayStyle == kInterleavedVaryingColor) {
glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, sizeof (GLfloat) * 7, 0);
glEnableVertexAttribArray(1);
glVertexAttribPointer(1, 4, GL_FLOAT, GL_FALSE, sizeof (GLfloat) * 7, (void*)(sizeof (GLfloat) * 3));
} else {
glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, sizeof (GLfloat) * 3, 0);
glDisableVertexAttribArray(1);
}
glBindBuffer(GL_ARRAY_BUFFER, 0);
glBindVertexArray(0);
}
//------------------------------------------------------------------------------
static void
fitFrame() {
g_pan[0] = g_pan[1] = 0;
g_dolly = g_size;
}
//------------------------------------------------------------------------------
static inline void
setSharpnessColor(float s, float *r, float *g, float *b) {
// 0.0 2.0 4.0
// green --- yellow --- red
*r = std::min(1.0f, s * 0.5f);
*g = std::min(1.0f, 2.0f - s*0.5f);
*b = 0;
}
static void
drawCageEdges() {
glUseProgram(g_defaultProgram.program);
glUniformMatrix4fv(g_defaultProgram.uniformModelViewProjectionMatrix,
1, GL_FALSE, g_transformData.ModelViewProjectionMatrix);
std::vector<float> vbo;
vbo.reserve(g_coarseEdges.size() * 6);
float r, g, b;
for (int i = 0; i < (int)g_coarseEdges.size(); i+=2) {
setSharpnessColor(g_coarseEdgeSharpness[i/2], &r, &g, &b);
for (int j = 0; j < 2; ++j) {
vbo.push_back(g_positions[g_coarseEdges[i+j]*3]);
vbo.push_back(g_positions[g_coarseEdges[i+j]*3+1]);
vbo.push_back(g_positions[g_coarseEdges[i+j]*3+2]);
vbo.push_back(r);
vbo.push_back(g);
vbo.push_back(b);
}
}
glBindVertexArray(g_cageEdgeVAO);
glBindBuffer(GL_ARRAY_BUFFER, g_cageEdgeVBO);
glBufferData(GL_ARRAY_BUFFER, (int)vbo.size() * sizeof(float), &vbo[0],
GL_STATIC_DRAW);
glEnableVertexAttribArray(g_defaultProgram.attrPosition);
glEnableVertexAttribArray(g_defaultProgram.attrColor);
glVertexAttribPointer(g_defaultProgram.attrPosition,
3, GL_FLOAT, GL_FALSE, sizeof (GLfloat) * 6, 0);
glVertexAttribPointer(g_defaultProgram.attrColor,
3, GL_FLOAT, GL_FALSE, sizeof (GLfloat) * 6, (void*)12);
glDrawArrays(GL_LINES, 0, (int)g_coarseEdges.size());
glBindVertexArray(0);
glUseProgram(0);
}
static void
drawCageVertices() {
glUseProgram(g_defaultProgram.program);
glUniformMatrix4fv(g_defaultProgram.uniformModelViewProjectionMatrix,
1, GL_FALSE, g_transformData.ModelViewProjectionMatrix);
int numPoints = (int)g_positions.size()/3;
std::vector<float> vbo;
vbo.reserve(numPoints*6);
float r, g, b;
for (int i = 0; i < numPoints; ++i) {
setSharpnessColor(g_coarseVertexSharpness[i], &r, &g, &b);
vbo.push_back(g_positions[i*3+0]);
vbo.push_back(g_positions[i*3+1]);
vbo.push_back(g_positions[i*3+2]);
vbo.push_back(r);
vbo.push_back(g);
vbo.push_back(b);
}
glBindVertexArray(g_cageVertexVAO);
glBindBuffer(GL_ARRAY_BUFFER, g_cageVertexVBO);
glBufferData(GL_ARRAY_BUFFER, (int)vbo.size() * sizeof(float), &vbo[0],
GL_STATIC_DRAW);
glEnableVertexAttribArray(g_defaultProgram.attrPosition);
glEnableVertexAttribArray(g_defaultProgram.attrColor);
glVertexAttribPointer(g_defaultProgram.attrPosition,
3, GL_FLOAT, GL_FALSE, sizeof (GLfloat) * 6, 0);
glVertexAttribPointer(g_defaultProgram.attrColor,
3, GL_FLOAT, GL_FALSE, sizeof (GLfloat) * 6, (void*)12);
glPointSize(10.0f);
glDrawArrays(GL_POINTS, 0, numPoints);
glPointSize(1.0f);
glBindVertexArray(0);
glUseProgram(0);
}
//------------------------------------------------------------------------------
union Effect {
Effect(int displayStyle_, int screenSpaceTess_, int fractionalSpacing_, int patchCull_, int singleCreasePatch_) : value(0) {
displayStyle = displayStyle_;
screenSpaceTess = screenSpaceTess_;
fractionalSpacing = fractionalSpacing_;
patchCull = patchCull_;
singleCreasePatch = singleCreasePatch_;
}
struct {
unsigned int displayStyle:3;
unsigned int screenSpaceTess:1;
unsigned int fractionalSpacing:1;
unsigned int patchCull:1;
unsigned int singleCreasePatch:1;
};
int value;
bool operator < (const Effect &e) const {
return value < e.value;
}
};
static Effect
GetEffect()
{
return Effect(g_displayStyle,
g_screenSpaceTess,
g_fractionalSpacing,
g_patchCull,
g_singleCreasePatch);
}
// ---------------------------------------------------------------------------
struct EffectDesc {
EffectDesc(OpenSubdiv::Far::PatchDescriptor desc,
Effect effect) : desc(desc), effect(effect),
maxValence(0), numElements(0) { }
OpenSubdiv::Far::PatchDescriptor desc;
Effect effect;
int maxValence;
int numElements;
bool operator < (const EffectDesc &e) const {
return
(desc < e.desc || ((desc == e.desc &&
(maxValence < e.maxValence || ((maxValence == e.maxValence) &&
(numElements < e.numElements || ((numElements == e.numElements) &&
(effect < e.effect))))))));
}
};
// ---------------------------------------------------------------------------
class ShaderCache : public GLShaderCache<EffectDesc> {
public:
virtual GLDrawConfig *CreateDrawConfig(EffectDesc const &effectDesc) {
using namespace OpenSubdiv;
// compile shader program
GLDrawConfig *config = new GLDrawConfig(GLUtils::GetShaderVersionInclude().c_str());
Far::PatchDescriptor::Type type = effectDesc.desc.GetType();
// common defines
std::stringstream ss;
if (type == Far::PatchDescriptor::QUADS) {
ss << "#define PRIM_QUAD\n";
} else {
ss << "#define PRIM_TRI\n";
}
// OSD tessellation controls
if (effectDesc.effect.screenSpaceTess) {
ss << "#define OSD_ENABLE_SCREENSPACE_TESSELLATION\n";
}
if (effectDesc.effect.fractionalSpacing) {
ss << "#define OSD_FRACTIONAL_ODD_SPACING\n";
}
if (effectDesc.effect.patchCull) {
ss << "#define OSD_ENABLE_PATCH_CULL\n";
}
if (effectDesc.effect.singleCreasePatch) {
ss << "#define OSD_PATCH_ENABLE_SINGLE_CREASE\n";
}
// for legacy gregory
ss << "#define OSD_MAX_VALENCE " << effectDesc.maxValence << "\n";
ss << "#define OSD_NUM_ELEMENTS " << effectDesc.numElements << "\n";
// display styles
switch (effectDesc.effect.displayStyle) {
case kWire:
ss << "#define GEOMETRY_OUT_WIRE\n";
break;
case kWireShaded:
ss << "#define GEOMETRY_OUT_LINE\n";
break;
case kShaded:
ss << "#define GEOMETRY_OUT_FILL\n";
break;
case kVaryingColor:
ss << "#define VARYING_COLOR\n";
ss << "#define GEOMETRY_OUT_FILL\n";
break;
case kInterleavedVaryingColor:
ss << "#define VARYING_COLOR\n";
ss << "#define GEOMETRY_OUT_FILL\n";
break;
case kFaceVaryingColor:
ss << "#define OSD_FVAR_WIDTH 2\n";
ss << "#define FACEVARYING_COLOR\n";
ss << "#define GEOMETRY_OUT_FILL\n";
break;
}
if (effectDesc.desc.IsAdaptive()) {
ss << "#define SMOOTH_NORMALS\n";
} else {
ss << "#define UNIFORM_SUBDIVISION\n";
}
if (type == Far::PatchDescriptor::TRIANGLES) {
ss << "#define LOOP\n";
}
// need for patch color-coding : we need these defines in the fragment shader
if (type == Far::PatchDescriptor::GREGORY) {
ss << "#define OSD_PATCH_GREGORY\n";
} else if (type == Far::PatchDescriptor::GREGORY_BOUNDARY) {
ss << "#define OSD_PATCH_GREGORY_BOUNDARY\n";
} else if (type == Far::PatchDescriptor::GREGORY_BASIS) {
ss << "#define OSD_PATCH_GREGORY_BASIS\n";
}
// include osd PatchCommon
ss << Osd::GLSLPatchShaderSource::GetCommonShaderSource();
std::string common = ss.str();
ss.str("");
// vertex shader
ss << common
// enable local vertex shader
<< (effectDesc.desc.IsAdaptive() ? "" : "#define VERTEX_SHADER\n")
<< shaderSource()
<< Osd::GLSLPatchShaderSource::GetVertexShaderSource(type);
config->CompileAndAttachShader(GL_VERTEX_SHADER, ss.str());
ss.str("");
if (effectDesc.desc.IsAdaptive()) {
// tess control shader
ss << common
<< shaderSource()
<< Osd::GLSLPatchShaderSource::GetTessControlShaderSource(type);
config->CompileAndAttachShader(GL_TESS_CONTROL_SHADER, ss.str());
ss.str("");
// tess eval shader
ss << common
<< shaderSource()
<< Osd::GLSLPatchShaderSource::GetTessEvalShaderSource(type);
config->CompileAndAttachShader(GL_TESS_EVALUATION_SHADER, ss.str());
ss.str("");
}
// geometry shader
ss << common
<< "#define GEOMETRY_SHADER\n"
<< shaderSource();
config->CompileAndAttachShader(GL_GEOMETRY_SHADER, ss.str());
ss.str("");
// fragment shader
ss << common
<< "#define FRAGMENT_SHADER\n"
<< shaderSource();
config->CompileAndAttachShader(GL_FRAGMENT_SHADER, ss.str());
ss.str("");
if (!config->Link()) {
delete config;
return NULL;
}
// assign uniform locations
GLuint uboIndex;
GLuint program = config->GetProgram();
g_transformBinding = 0;
uboIndex = glGetUniformBlockIndex(program, "Transform");
if (uboIndex != GL_INVALID_INDEX)
glUniformBlockBinding(program, uboIndex, g_transformBinding);
g_tessellationBinding = 1;
uboIndex = glGetUniformBlockIndex(program, "Tessellation");
if (uboIndex != GL_INVALID_INDEX)
glUniformBlockBinding(program, uboIndex, g_tessellationBinding);
g_lightingBinding = 2;
uboIndex = glGetUniformBlockIndex(program, "Lighting");
if (uboIndex != GL_INVALID_INDEX)
glUniformBlockBinding(program, uboIndex, g_lightingBinding);
// assign texture locations
GLint loc;
glUseProgram(program);
if ((loc = glGetUniformLocation(program, "OsdPatchParamBuffer")) != -1) {
glUniform1i(loc, 0); // GL_TEXTURE0
}
if ((loc = glGetUniformLocation(program, "OsdFVarDataBuffer")) != -1) {
glUniform1i(loc, 1); // GL_TEXTURE1
}
// for legacy gregory patches
if ((loc = glGetUniformLocation(program, "OsdVertexBuffer")) != -1) {
glUniform1i(loc, 2); // GL_TEXTURE2
}
if ((loc = glGetUniformLocation(program, "OsdValenceBuffer")) != -1) {
glUniform1i(loc, 3); // GL_TEXTURE3
}
if ((loc = glGetUniformLocation(program, "OsdQuadOffsetBuffer")) != -1) {
glUniform1i(loc, 4); // GL_TEXTURE4
}
glUseProgram(0);
return config;
}
};
ShaderCache g_shaderCache;
//------------------------------------------------------------------------------
static void
updateUniformBlocks() {
if (! g_transformUB) {
glGenBuffers(1, &g_transformUB);
glBindBuffer(GL_UNIFORM_BUFFER, g_transformUB);
glBufferData(GL_UNIFORM_BUFFER,
sizeof(g_transformData), NULL, GL_STATIC_DRAW);
};
glBindBuffer(GL_UNIFORM_BUFFER, g_transformUB);
glBufferSubData(GL_UNIFORM_BUFFER,
0, sizeof(g_transformData), &g_transformData);
glBindBuffer(GL_UNIFORM_BUFFER, 0);
glBindBufferBase(GL_UNIFORM_BUFFER, g_transformBinding, g_transformUB);
// Update and bind tessellation state
struct Tessellation {
float TessLevel;
} tessellationData;
tessellationData.TessLevel = static_cast<float>(1 << g_tessLevel);
if (! g_tessellationUB) {
glGenBuffers(1, &g_tessellationUB);
glBindBuffer(GL_UNIFORM_BUFFER, g_tessellationUB);
glBufferData(GL_UNIFORM_BUFFER,
sizeof(tessellationData), NULL, GL_STATIC_DRAW);
};
glBindBuffer(GL_UNIFORM_BUFFER, g_tessellationUB);
glBufferSubData(GL_UNIFORM_BUFFER,
0, sizeof(tessellationData), &tessellationData);
glBindBuffer(GL_UNIFORM_BUFFER, 0);
glBindBufferBase(GL_UNIFORM_BUFFER, g_tessellationBinding, g_tessellationUB);
// Update and bind lighting state
struct Lighting {
struct Light {
float position[4];
float ambient[4];
float diffuse[4];
float specular[4];
} lightSource[2];
} lightingData = {
{{ { 0.5, 0.2f, 1.0f, 0.0f },
{ 0.1f, 0.1f, 0.1f, 1.0f },
{ 0.7f, 0.7f, 0.7f, 1.0f },
{ 0.8f, 0.8f, 0.8f, 1.0f } },
{ { -0.8f, 0.4f, -1.0f, 0.0f },
{ 0.0f, 0.0f, 0.0f, 1.0f },
{ 0.5f, 0.5f, 0.5f, 1.0f },
{ 0.8f, 0.8f, 0.8f, 1.0f } }}
};
if (! g_lightingUB) {
glGenBuffers(1, &g_lightingUB);
glBindBuffer(GL_UNIFORM_BUFFER, g_lightingUB);
glBufferData(GL_UNIFORM_BUFFER,
sizeof(lightingData), NULL, GL_STATIC_DRAW);
};
glBindBuffer(GL_UNIFORM_BUFFER, g_lightingUB);
glBufferSubData(GL_UNIFORM_BUFFER,
0, sizeof(lightingData), &lightingData);
glBindBuffer(GL_UNIFORM_BUFFER, 0);
glBindBufferBase(GL_UNIFORM_BUFFER, g_lightingBinding, g_lightingUB);
}
static void
bindTextures() {
// bind patch textures
if (g_mesh->GetPatchTable()->GetPatchParamTextureBuffer()) {
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_BUFFER,
g_mesh->GetPatchTable()->GetPatchParamTextureBuffer());
}
if (true) {
glActiveTexture(GL_TEXTURE1);
glBindTexture(GL_TEXTURE_BUFFER,
g_fvarData.textureBuffer);
}
// legacy gregory
if (g_legacyGregoryPatchTable) {
glActiveTexture(GL_TEXTURE2);
glBindTexture(GL_TEXTURE_BUFFER,
g_legacyGregoryPatchTable->GetVertexTextureBuffer());
glActiveTexture(GL_TEXTURE3);
glBindTexture(GL_TEXTURE_BUFFER,
g_legacyGregoryPatchTable->GetVertexValenceTextureBuffer());
glActiveTexture(GL_TEXTURE4);
glBindTexture(GL_TEXTURE_BUFFER,
g_legacyGregoryPatchTable->GetQuadOffsetsTextureBuffer());
}
glActiveTexture(GL_TEXTURE0);
}
static GLenum
bindProgram(Effect effect,
OpenSubdiv::Osd::PatchArray const & patch) {
EffectDesc effectDesc(patch.GetDescriptor(), effect);
// only legacy gregory needs maxValence and numElements
// neither legacy gregory nor gregory basis need single crease
typedef OpenSubdiv::Far::PatchDescriptor Descriptor;
if (patch.GetDescriptor().GetType() == Descriptor::GREGORY or
patch.GetDescriptor().GetType() == Descriptor::GREGORY_BOUNDARY) {
int maxValence = g_mesh->GetMaxValence();
int numElements = (g_displayStyle == kInterleavedVaryingColor ? 7 : 3);
effectDesc.maxValence = maxValence;
effectDesc.numElements = numElements;
effectDesc.effect.singleCreasePatch = 0;
}
if (patch.GetDescriptor().GetType() == Descriptor::GREGORY_BASIS) {
effectDesc.effect.singleCreasePatch = 0;
}
// lookup shader cache (compile the shader if needed)
GLDrawConfig *config = g_shaderCache.GetDrawConfig(effectDesc);
if (!config) return 0;
GLuint program = config->GetProgram();
glUseProgram(program);
// bind standalone uniforms
GLint uniformPrimitiveIdBase =
glGetUniformLocation(program, "PrimitiveIdBase");
if (uniformPrimitiveIdBase >=0)
glUniform1i(uniformPrimitiveIdBase, patch.GetPrimitiveIdBase());
// legacy gregory
if (g_endCap == kEndCapLegacyGregory) {
GLint uniformGregoryQuadOffsetBase =
glGetUniformLocation(program, "GregoryQuadOffsetBase");
int quadOffsetBase =
g_legacyGregoryPatchTable->GetQuadOffsetsBase(patch.GetDescriptor().GetType());
if (uniformGregoryQuadOffsetBase >= 0)
glUniform1i(uniformGregoryQuadOffsetBase, quadOffsetBase);
}
// return primtype
GLenum primType;
switch(effectDesc.desc.GetType()) {
case Descriptor::QUADS:
primType = GL_LINES_ADJACENCY;
break;
case Descriptor::TRIANGLES:
primType = GL_TRIANGLES;
break;
default:
#if defined(GL_ARB_tessellation_shader) || defined(GL_VERSION_4_0)
primType = GL_PATCHES;
glPatchParameteri(GL_PATCH_VERTICES, effectDesc.desc.GetNumControlVertices());
#else
primType = GL_POINTS;
#endif
break;
}
return primType;
}
//------------------------------------------------------------------------------
static void
display() {
SSAOGLFrameBuffer * fb = (SSAOGLFrameBuffer *)g_hud.GetFrameBuffer();
fb->Bind();
Stopwatch s;
s.Start();
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glViewport(0, 0, g_width, g_height);
// prepare view matrix
double aspect = g_width/(double)g_height;
identity(g_transformData.ModelViewMatrix);
translate(g_transformData.ModelViewMatrix, -g_pan[0], -g_pan[1], -g_dolly);
rotate(g_transformData.ModelViewMatrix, g_rotate[1], 1, 0, 0);
rotate(g_transformData.ModelViewMatrix, g_rotate[0], 0, 1, 0);
rotate(g_transformData.ModelViewMatrix, -90, 1, 0, 0);
translate(g_transformData.ModelViewMatrix,
-g_center[0], -g_center[1], -g_center[2]);
perspective(g_transformData.ProjectionMatrix,
45.0f, (float)aspect, fb->IsActive() ? 1.0f : 0.0001f, 500.0f);
multMatrix(g_transformData.ModelViewProjectionMatrix,
g_transformData.ModelViewMatrix,
g_transformData.ProjectionMatrix);
// make sure that the vertex buffer is interoped back as a GL resources.
GLuint vbo = g_mesh->BindVertexBuffer();
// vertex texture update for legacy gregory drawing
if (g_legacyGregoryPatchTable) {
glActiveTexture(GL_TEXTURE1);
g_legacyGregoryPatchTable->UpdateVertexBuffer(vbo);
}
if (g_displayStyle == kVaryingColor)
g_mesh->BindVaryingBuffer();
// update transform and lighting uniform blocks
updateUniformBlocks();
// also bind patch related textures
bindTextures();
if (g_displayStyle == kWire)
glDisable(GL_CULL_FACE);
glEnable(GL_DEPTH_TEST);
glBindVertexArray(g_vao);
OpenSubdiv::Osd::PatchArrayVector const & patches =
g_mesh->GetPatchTable()->GetPatchArrays();
// patch drawing
int patchCount[13]; // [Type] (see far/patchTable.h)
int numTotalPatches = 0;
int numDrawCalls = 0;
memset(patchCount, 0, sizeof(patchCount));
// primitive counting
glBeginQuery(GL_PRIMITIVES_GENERATED, g_queries[0]);
#if defined(GL_VERSION_3_3)
glBeginQuery(GL_TIME_ELAPSED, g_queries[1]);
#endif
// core draw-calls
for (int i=0; i<(int)patches.size(); ++i) {
OpenSubdiv::Osd::PatchArray const & patch = patches[i];
OpenSubdiv::Far::PatchDescriptor desc = patch.GetDescriptor();
OpenSubdiv::Far::PatchDescriptor::Type patchType = desc.GetType();
patchCount[patchType] += patch.GetNumPatches();
numTotalPatches += patch.GetNumPatches();
GLenum primType = bindProgram(GetEffect(), patch);
glDrawElements(primType,
patch.GetNumPatches() * desc.GetNumControlVertices(),
GL_UNSIGNED_INT,
(void *)(patch.GetIndexBase() * sizeof(unsigned int)));
++numDrawCalls;
}
s.Stop();
float drawCpuTime = float(s.GetElapsed() * 1000.0f);
glEndQuery(GL_PRIMITIVES_GENERATED);
#if defined(GL_VERSION_3_3)
glEndQuery(GL_TIME_ELAPSED);
#endif
glBindVertexArray(0);
glUseProgram(0);
if (g_displayStyle == kWire)
glEnable(GL_CULL_FACE);
if (g_drawCageEdges)
drawCageEdges();
if (g_drawCageVertices)
drawCageVertices();
fb->ApplyImageShader();
GLuint numPrimsGenerated = 0;
GLuint timeElapsed = 0;
glGetQueryObjectuiv(g_queries[0], GL_QUERY_RESULT, &numPrimsGenerated);
#if defined(GL_VERSION_3_3)
glGetQueryObjectuiv(g_queries[1], GL_QUERY_RESULT, &timeElapsed);
#endif
float drawGpuTime = timeElapsed / 1000.0f / 1000.0f;
g_fpsTimer.Stop();
float elapsed = (float)g_fpsTimer.GetElapsed();
if (not g_freeze) {
g_animTime += elapsed;
}
g_fpsTimer.Start();
if (g_hud.IsVisible()) {
typedef OpenSubdiv::Far::PatchDescriptor Descriptor;
double fps = 1.0/elapsed;
if (g_displayPatchCounts) {
int x = -280;
int y = -180;
g_hud.DrawString(x, y, "NonPatch : %d",
patchCount[Descriptor::QUADS]); y += 20;
g_hud.DrawString(x, y, "Regular : %d",
patchCount[Descriptor::REGULAR]); y+= 20;
g_hud.DrawString(x, y, "Gregory : %d",
patchCount[Descriptor::GREGORY]); y+= 20;
g_hud.DrawString(x, y, "Boundary Gregory : %d",
patchCount[Descriptor::GREGORY_BOUNDARY]); y+= 20;
g_hud.DrawString(x, y, "Gregory Basis : %d",
patchCount[Descriptor::GREGORY_BASIS]); y+= 20;
}
int y = -220;
g_hud.DrawString(10, y, "Tess level : %d", g_tessLevel); y+= 20;
g_hud.DrawString(10, y, "Patches : %d", numTotalPatches); y+= 20;
g_hud.DrawString(10, y, "Draw calls : %d", numDrawCalls); y+= 20;
g_hud.DrawString(10, y, "Primitives : %d", numPrimsGenerated); y+= 20;
g_hud.DrawString(10, y, "Vertices : %d", g_mesh->GetNumVertices()); y+= 20;
g_hud.DrawString(10, y, "Scheme : %s", g_scheme==kBilinear ? "BILINEAR" : (g_scheme == kLoop ? "LOOP" : "CATMARK")); y+= 20;
g_hud.DrawString(10, y, "GPU Kernel : %.3f ms", g_gpuTime); y+= 20;
g_hud.DrawString(10, y, "CPU Kernel : %.3f ms", g_cpuTime); y+= 20;
g_hud.DrawString(10, y, "GPU Draw : %.3f ms", drawGpuTime); y+= 20;
g_hud.DrawString(10, y, "CPU Draw : %.3f ms", drawCpuTime); y+= 20;
g_hud.DrawString(10, y, "FPS : %3.1f", fps); y+= 20;
g_hud.Flush();
}
glFinish();
//checkGLErrors("display leave");
}
//------------------------------------------------------------------------------
static void
motion(GLFWwindow *, double dx, double dy) {
int x=(int)dx, y=(int)dy;
if (g_hud.MouseCapture()) {
// check gui
g_hud.MouseMotion(x, y);
} else if (g_mbutton[0] && !g_mbutton[1] && !g_mbutton[2]) {
// orbit
g_rotate[0] += x - g_prev_x;
g_rotate[1] += y - g_prev_y;
} else if (!g_mbutton[0] && !g_mbutton[1] && g_mbutton[2]) {
// pan
g_pan[0] -= g_dolly*(x - g_prev_x)/g_width;
g_pan[1] += g_dolly*(y - g_prev_y)/g_height;
} else if ((g_mbutton[0] && !g_mbutton[1] && g_mbutton[2]) or
(!g_mbutton[0] && g_mbutton[1] && !g_mbutton[2])) {
// dolly
g_dolly -= g_dolly*0.01f*(x - g_prev_x);
if(g_dolly <= 0.01) g_dolly = 0.01f;
}
g_prev_x = x;
g_prev_y = y;
}
//------------------------------------------------------------------------------
static void
mouse(GLFWwindow *, int button, int state, int /* mods */) {
if (state == GLFW_RELEASE)
g_hud.MouseRelease();
if (button == 0 && state == GLFW_PRESS && g_hud.MouseClick(g_prev_x, g_prev_y))
return;
if (button < 3) {
g_mbutton[button] = (state == GLFW_PRESS);
}
}
//------------------------------------------------------------------------------
static void
uninitGL() {
glDeleteQueries(2, g_queries);
glDeleteBuffers(1, &g_cageVertexVBO);
glDeleteBuffers(1, &g_cageEdgeVBO);
glDeleteVertexArrays(1, &g_vao);
glDeleteVertexArrays(1, &g_cageVertexVAO);
glDeleteVertexArrays(1, &g_cageEdgeVAO);
if (g_mesh)
delete g_mesh;
if (g_legacyGregoryPatchTable)
delete g_legacyGregoryPatchTable;
}
//------------------------------------------------------------------------------
static void
reshape(GLFWwindow *, int width, int height) {
g_width = width;
g_height = height;
int windowWidth = g_width, windowHeight = g_height;
// window size might not match framebuffer size on a high DPI display
glfwGetWindowSize(g_window, &windowWidth, &windowHeight);
g_hud.Rebuild(windowWidth, windowHeight, width, height);
}
//------------------------------------------------------------------------------
void windowClose(GLFWwindow*) {
g_running = false;
}
//------------------------------------------------------------------------------
static void
toggleFullScreen() {
// XXXX manuelk : to re-implement from glut
}
//------------------------------------------------------------------------------
static void
keyboard(GLFWwindow *, int key, int /* scancode */, int event, int /* mods */) {
if (event == GLFW_RELEASE) return;
if (g_hud.KeyDown(tolower(key))) return;
switch (key) {
case 'Q': g_running = 0; break;
case 'F': fitFrame(); break;
case GLFW_KEY_TAB: toggleFullScreen(); break;
case '+':
case '=': g_tessLevel++; break;
case '-': g_tessLevel = std::max(g_tessLevelMin, g_tessLevel-1); break;
case GLFW_KEY_ESCAPE: g_hud.SetVisible(!g_hud.IsVisible()); break;
case 'X': g_hud.GetFrameBuffer()->Screenshot(); break;
}
}
//------------------------------------------------------------------------------
static void
rebuildOsdMesh() {
createOsdMesh( g_defaultShapes[ g_currentShape ], g_level, g_kernel, g_defaultShapes[ g_currentShape ].scheme );
}
static void
callbackDisplayStyle(int b) {
if (g_displayStyle == kVaryingColor or b == kVaryingColor or
g_displayStyle == kInterleavedVaryingColor or b == kInterleavedVaryingColor or
g_displayStyle == kFaceVaryingColor or b == kFaceVaryingColor) {
// need to rebuild for varying reconstruct
g_displayStyle = b;
rebuildOsdMesh();
return;
}
g_displayStyle = b;
}
static void
callbackEndCap(int endCap) {
g_endCap = endCap;
rebuildOsdMesh();
}
static void
callbackKernel(int k) {
g_kernel = k;
#ifdef OPENSUBDIV_HAS_OPENCL
if (g_kernel == kCL and (not g_clDeviceContext.IsInitialized())) {
if (g_clDeviceContext.Initialize() == false) {
printf("Error in initializing OpenCL\n");
exit(1);
}
}
#endif
#ifdef OPENSUBDIV_HAS_CUDA
if (g_kernel == kCUDA and (not g_cudaDeviceContext.IsInitialized())) {
if (g_cudaDeviceContext.Initialize() == false) {
printf("Error in initializing Cuda\n");
exit(1);
}
}
#endif
rebuildOsdMesh();
}
static void
callbackLevel(int l) {
g_level = l;
rebuildOsdMesh();
}
static void
callbackModel(int m) {
if (m < 0)
m = 0;
if (m >= (int)g_defaultShapes.size())
m = (int)g_defaultShapes.size() - 1;
g_currentShape = m;
rebuildOsdMesh();
}
static void
callbackCheckBox(bool checked, int button) {
if (GLUtils::SupportsAdaptiveTessellation()) {
switch(button) {
case kHUD_CB_ADAPTIVE:
g_adaptive = checked;
rebuildOsdMesh();
return;
case kHUD_CB_SINGLE_CREASE_PATCH:
g_singleCreasePatch = checked;
rebuildOsdMesh();
return;
default:
break;
}
}
switch (button) {
case kHUD_CB_DISPLAY_CAGE_EDGES:
g_drawCageEdges = checked;
break;
case kHUD_CB_DISPLAY_CAGE_VERTS:
g_drawCageVertices = checked;
break;
case kHUD_CB_ANIMATE_VERTICES:
g_moveScale = checked;
break;
case kHUD_CB_DISPLAY_PATCH_COLOR:
g_displayPatchColor = checked;
break;
case kHUD_CB_VIEW_LOD:
g_screenSpaceTess = checked;
break;
case kHUD_CB_FRACTIONAL_SPACING:
g_fractionalSpacing = checked;
break;
case kHUD_CB_PATCH_CULL:
g_patchCull = checked;
break;
case kHUD_CB_FREEZE:
g_freeze = checked;
break;
case kHUD_CB_DISPLAY_PATCH_COUNTS:
g_displayPatchCounts = checked;
break;
}
}
static void
initHUD() {
int windowWidth = g_width, windowHeight = g_height;
int frameBufferWidth = g_width, frameBufferHeight = g_height;
// window size might not match framebuffer size on a high DPI display
glfwGetWindowSize(g_window, &windowWidth, &windowHeight);
glfwGetFramebufferSize(g_window, &frameBufferWidth, &frameBufferHeight);
g_hud.Init(windowWidth, windowHeight, frameBufferWidth, frameBufferHeight);
g_hud.SetFrameBuffer(new SSAOGLFrameBuffer);
g_hud.AddCheckBox("Cage Edges (H)", g_drawCageEdges != 0,
10, 10, callbackCheckBox, kHUD_CB_DISPLAY_CAGE_EDGES, 'h');
g_hud.AddCheckBox("Cage Verts (J)", g_drawCageVertices != 0,
10, 30, callbackCheckBox, kHUD_CB_DISPLAY_CAGE_VERTS, 'j');
g_hud.AddCheckBox("Animate vertices (M)", g_moveScale != 0,
10, 50, callbackCheckBox, kHUD_CB_ANIMATE_VERTICES, 'm');
g_hud.AddCheckBox("Patch Color (P)", g_displayPatchColor != 0,
10, 70, callbackCheckBox, kHUD_CB_DISPLAY_PATCH_COLOR, 'p');
g_hud.AddCheckBox("Screen space LOD (V)", g_screenSpaceTess != 0,
10, 90, callbackCheckBox, kHUD_CB_VIEW_LOD, 'v');
g_hud.AddCheckBox("Fractional spacing (T)", g_fractionalSpacing != 0,
10, 110, callbackCheckBox, kHUD_CB_FRACTIONAL_SPACING, 't');
g_hud.AddCheckBox("Frustum Patch Culling (B)", g_patchCull != 0,
10, 130, callbackCheckBox, kHUD_CB_PATCH_CULL, 'b');
g_hud.AddCheckBox("Freeze (spc)", g_freeze != 0,
10, 150, callbackCheckBox, kHUD_CB_FREEZE, ' ');
int shading_pulldown = g_hud.AddPullDown("Shading (W)", 200, 10, 250, callbackDisplayStyle, 'w');
g_hud.AddPullDownButton(shading_pulldown, "Wire", kWire, g_displayStyle==kWire);
g_hud.AddPullDownButton(shading_pulldown, "Shaded", kShaded, g_displayStyle==kShaded);
g_hud.AddPullDownButton(shading_pulldown, "Wire+Shaded", kWireShaded, g_displayStyle==kWireShaded);
g_hud.AddPullDownButton(shading_pulldown, "Varying Color", kVaryingColor, g_displayStyle==kVaryingColor);
g_hud.AddPullDownButton(shading_pulldown, "Varying Color (Interleaved)", kInterleavedVaryingColor, g_displayStyle==kInterleavedVaryingColor);
g_hud.AddPullDownButton(shading_pulldown, "FaceVarying Color", kFaceVaryingColor, g_displayStyle==kFaceVaryingColor);
int compute_pulldown = g_hud.AddPullDown("Compute (K)", 475, 10, 300, callbackKernel, 'k');
g_hud.AddPullDownButton(compute_pulldown, "CPU", kCPU);
#ifdef OPENSUBDIV_HAS_OPENMP
g_hud.AddPullDownButton(compute_pulldown, "OpenMP", kOPENMP);
#endif
#ifdef OPENSUBDIV_HAS_TBB
g_hud.AddPullDownButton(compute_pulldown, "TBB", kTBB);
#endif
#ifdef OPENSUBDIV_HAS_CUDA
g_hud.AddPullDownButton(compute_pulldown, "CUDA", kCUDA);
#endif
#ifdef OPENSUBDIV_HAS_OPENCL
if (CLDeviceContext::HAS_CL_VERSION_1_1()) {
g_hud.AddPullDownButton(compute_pulldown, "OpenCL", kCL);
}
#endif
#ifdef OPENSUBDIV_HAS_GLSL_TRANSFORM_FEEDBACK
g_hud.AddPullDownButton(compute_pulldown, "GLSL TransformFeedback", kGLSL);
#endif
#ifdef OPENSUBDIV_HAS_GLSL_COMPUTE
if (GLUtils::GL_ARBComputeShaderOrGL_VERSION_4_3()) {
g_hud.AddPullDownButton(compute_pulldown, "GLSL Compute", kGLSLCompute);
}
#endif
if (GLUtils::SupportsAdaptiveTessellation()) {
g_hud.AddCheckBox("Adaptive (`)", g_adaptive!=0,
10, 190, callbackCheckBox, kHUD_CB_ADAPTIVE, '`');
g_hud.AddCheckBox("Single Crease Patch (S)", g_singleCreasePatch!=0,
10, 210, callbackCheckBox, kHUD_CB_SINGLE_CREASE_PATCH, 's');
int endcap_pulldown = g_hud.AddPullDown(
"End cap (E)", 10, 230, 200, callbackEndCap, 'e');
g_hud.AddPullDownButton(endcap_pulldown,"None",
kEndCapNone,
g_endCap == kEndCapNone);
g_hud.AddPullDownButton(endcap_pulldown, "BSpline",
kEndCapBSplineBasis,
g_endCap == kEndCapBSplineBasis);
g_hud.AddPullDownButton(endcap_pulldown, "GregoryBasis",
kEndCapGregoryBasis,
g_endCap == kEndCapGregoryBasis);
g_hud.AddPullDownButton(endcap_pulldown, "LegacyGregory",
kEndCapLegacyGregory,
g_endCap == kEndCapLegacyGregory);
}
for (int i = 1; i < 11; ++i) {
char level[16];
sprintf(level, "Lv. %d", i);
g_hud.AddRadioButton(3, level, i==2, 10, 310+i*20, callbackLevel, i, '0'+(i%10));
}
int shapes_pulldown = g_hud.AddPullDown("Shape (N)", -300, 10, 300, callbackModel, 'n');
for (int i = 0; i < (int)g_defaultShapes.size(); ++i) {
g_hud.AddPullDownButton(shapes_pulldown, g_defaultShapes[i].name.c_str(),i);
}
g_hud.AddCheckBox("Show patch counts", g_displayPatchCounts!=0, -280, -20, callbackCheckBox, kHUD_CB_DISPLAY_PATCH_COUNTS);
g_hud.Rebuild(windowWidth, windowHeight, frameBufferWidth, frameBufferHeight);
}
//------------------------------------------------------------------------------
static void
initGL() {
glClearColor(0.1f, 0.1f, 0.1f, 0.0f);
glEnable(GL_DEPTH_TEST);
glDepthFunc(GL_LEQUAL);
glCullFace(GL_BACK);
glEnable(GL_CULL_FACE);
glGenQueries(2, g_queries);
glGenVertexArrays(1, &g_vao);
glGenVertexArrays(1, &g_cageVertexVAO);
glGenVertexArrays(1, &g_cageEdgeVAO);
glGenBuffers(1, &g_cageVertexVBO);
glGenBuffers(1, &g_cageEdgeVBO);
}
//------------------------------------------------------------------------------
static void
idle() {
if (not g_freeze) {
g_frame++;
updateGeom();
}
if (g_repeatCount != 0 and g_frame >= g_repeatCount)
g_running = 0;
}
//------------------------------------------------------------------------------
static void
callbackErrorOsd(OpenSubdiv::Far::ErrorType err, const char *message) {
printf("Error: %d\n", err);
printf("%s", message);
}
//------------------------------------------------------------------------------
static void
callbackErrorGLFW(int error, const char* description) {
fprintf(stderr, "GLFW Error (%d) : %s\n", error, description);
}
//------------------------------------------------------------------------------
static void
setGLCoreProfile(int major, int minor) {
#define glfwOpenWindowHint glfwWindowHint
#define GLFW_OPENGL_VERSION_MAJOR GLFW_CONTEXT_VERSION_MAJOR
#define GLFW_OPENGL_VERSION_MINOR GLFW_CONTEXT_VERSION_MINOR
glfwOpenWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
glfwOpenWindowHint(GLFW_OPENGL_VERSION_MAJOR, major);
glfwOpenWindowHint(GLFW_OPENGL_VERSION_MINOR, minor);
glfwOpenWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE);
}
//------------------------------------------------------------------------------
int main(int argc, char ** argv) {
bool fullscreen = false;
std::string str;
std::vector<char const *> animobjs;
for (int i = 1; i < argc; ++i) {
if (strstr(argv[i], ".obj")) {
animobjs.push_back(argv[i]);
}
else if (!strcmp(argv[i], "-axis")) {
g_axis = false;
}
else if (!strcmp(argv[i], "-d")) {
g_level = atoi(argv[++i]);
}
else if (!strcmp(argv[i], "-c")) {
g_repeatCount = atoi(argv[++i]);
}
else if (!strcmp(argv[i], "-f")) {
fullscreen = true;
}
else {
std::ifstream ifs(argv[1]);
if (ifs) {
std::stringstream ss;
ss << ifs.rdbuf();
ifs.close();
str = ss.str();
g_defaultShapes.push_back(ShapeDesc(argv[1], str.c_str(), kCatmark));
}
}
}
if (not animobjs.empty()) {
g_defaultShapes.push_back(ShapeDesc(animobjs[0], "", kCatmark));
g_objAnim = ObjAnim::Create(animobjs, g_axis);
}
initShapes();
g_fpsTimer.Start();
OpenSubdiv::Far::SetErrorCallback(callbackErrorOsd);
glfwSetErrorCallback(callbackErrorGLFW);
if (not glfwInit()) {
printf("Failed to initialize GLFW\n");
return 1;
}
static const char windowTitle[] = "OpenSubdiv glViewer " OPENSUBDIV_VERSION_STRING;
#define CORE_PROFILE
#ifdef CORE_PROFILE
setGLCoreProfile(4, 4);
#endif
if (fullscreen) {
g_primary = glfwGetPrimaryMonitor();
// apparently glfwGetPrimaryMonitor fails under linux : if no primary,
// settle for the first one in the list
if (not g_primary) {
int count = 0;
GLFWmonitor ** monitors = glfwGetMonitors(&count);
if (count)
g_primary = monitors[0];
}
if (g_primary) {
GLFWvidmode const * vidmode = glfwGetVideoMode(g_primary);
g_width = vidmode->width;
g_height = vidmode->height;
}
}
g_window = glfwCreateWindow(g_width, g_height, windowTitle,
fullscreen and g_primary ? g_primary : NULL, NULL);
#ifdef CORE_PROFILE
if (not g_window){
setGLCoreProfile(4, 2);
g_window = glfwCreateWindow(g_width, g_height, windowTitle,
fullscreen and g_primary ? g_primary : NULL, NULL);
}
if (not g_window){
setGLCoreProfile(3, 3);
g_window = glfwCreateWindow(g_width, g_height, windowTitle,
fullscreen and g_primary ? g_primary : NULL, NULL);
}
#endif
if (not g_window){
glfwTerminate();
return 1;
}
glfwMakeContextCurrent(g_window);
// accommocate high DPI displays (e.g. mac retina displays)
glfwGetFramebufferSize(g_window, &g_width, &g_height);
glfwSetFramebufferSizeCallback(g_window, reshape);
glfwSetKeyCallback(g_window, keyboard);
glfwSetCursorPosCallback(g_window, motion);
glfwSetMouseButtonCallback(g_window, mouse);
glfwSetWindowCloseCallback(g_window, windowClose);
#if defined(OSD_USES_GLEW)
#ifdef CORE_PROFILE
// this is the only way to initialize glew correctly under core profile context.
glewExperimental = true;
#endif
if (GLenum r = glewInit() != GLEW_OK) {
printf("Failed to initialize glew. Error = %s\n", glewGetErrorString(r));
exit(1);
}
#ifdef CORE_PROFILE
// clear GL errors which was generated during glewInit()
glGetError();
#endif
#endif
// activate feature adaptive tessellation if OSD supports it
g_adaptive = GLUtils::SupportsAdaptiveTessellation();
initGL();
linkDefaultProgram();
glfwSwapInterval(0);
initHUD();
rebuildOsdMesh();
while (g_running) {
idle();
display();
glfwPollEvents();
glfwSwapBuffers(g_window);
glFinish();
}
uninitGL();
glfwTerminate();
}
//------------------------------------------------------------------------------
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