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isolate opengl functions #1330

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isolate opengl functions #1330

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1 change: 1 addition & 0 deletions CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -275,6 +275,7 @@ list(APPEND NGP_SOURCES
src/tinyexr_wrapper.cu
src/tinyobj_loader_wrapper.cpp
src/triangle_bvh.cu
src/opengl_utils.cu
)

set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR})
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5 changes: 1 addition & 4 deletions include/neural-graphics-primitives/marching_cubes.h
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Expand Up @@ -15,6 +15,7 @@
#pragma once

#include <neural-graphics-primitives/bounding_box.cuh>
#include <neural-graphics-primitives/opengl_utils.h>

#include <tiny-cuda-nn/common.h>

Expand Down Expand Up @@ -64,10 +65,6 @@ void draw_mesh_gl(
const vec2& screen_center,
int mesh_render_mode
);

void glCheckError(const char* file, unsigned int line);
uint32_t compile_shader(bool pixel, const char* code);
bool check_shader(uint32_t handle, const char* desc, bool program);
#endif

void save_density_grid_to_png(const tcnn::GPUMemory<float>& density, const fs::path& path, ivec3 res3d, float thresh, bool swap_y_z = true, float density_range = 4.f);
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27 changes: 27 additions & 0 deletions include/neural-graphics-primitives/opengl_utils.h
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@@ -0,0 +1,27 @@
#pragma once
#include <neural-graphics-primitives/common.h>

#ifdef NGP_GUI
# ifdef _WIN32
# include <GL/gl3w.h>
# else
# include <GL/glew.h>
# endif
# include <GLFW/glfw3.h>
# include <cuda_gl_interop.h>
#endif

NGP_NAMESPACE_BEGIN
#ifdef NGP_GUI

enum eShaderType {
Fragment,
Vertex,
Geometry
};

void glCheckError(const char* file, unsigned int line);
bool check_shader(uint32_t handle, const char* desc, bool program);
uint32_t compile_shader(eShaderType shader_type, const char* code);
#endif //NGP_GUI
NGP_NAMESPACE_END
74 changes: 3 additions & 71 deletions src/marching_cubes.cu
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Expand Up @@ -17,22 +17,13 @@
#include <neural-graphics-primitives/common.h>
#include <neural-graphics-primitives/random_val.cuh> // helpers to generate random values, directions
#include <neural-graphics-primitives/thread_pool.h>
#include <neural-graphics-primitives/opengl_utils.h>

#include <tiny-cuda-nn/gpu_memory.h>
#include <filesystem/path.h>

#include <stdarg.h>

#ifdef NGP_GUI
# ifdef _WIN32
# include <GL/gl3w.h>
# else
# include <GL/glew.h>
# endif
# include <GLFW/glfw3.h>
# include <cuda_gl_interop.h>
#endif

#include <vector>

using namespace tcnn;
Expand All @@ -49,65 +40,6 @@ ivec3 get_marching_cubes_res(uint32_t res_1d, const BoundingBox &aabb) {
}

#ifdef NGP_GUI
void glCheckError(const char* file, unsigned int line) {
GLenum errorCode = glGetError();
while (errorCode != GL_NO_ERROR) {
std::string fileString(file);
std::string error = "unknown error";
// clang-format off
switch (errorCode) {
case GL_INVALID_ENUM: error = "GL_INVALID_ENUM"; break;
case GL_INVALID_VALUE: error = "GL_INVALID_VALUE"; break;
case GL_INVALID_OPERATION: error = "GL_INVALID_OPERATION"; break;
case GL_STACK_OVERFLOW: error = "GL_STACK_OVERFLOW"; break;
case GL_STACK_UNDERFLOW: error = "GL_STACK_UNDERFLOW"; break;
case GL_OUT_OF_MEMORY: error = "GL_OUT_OF_MEMORY"; break;
}
// clang-format on

tlog::error() << "OpenglError : file=" << file << " line=" << line << " error:" << error;
errorCode = glGetError();
}
}

bool check_shader(uint32_t handle, const char* desc, bool program) {
GLint status = 0, log_length = 0;
if (program) {
glGetProgramiv(handle, GL_LINK_STATUS, &status);
glGetProgramiv(handle, GL_INFO_LOG_LENGTH, &log_length);
} else {
glGetShaderiv(handle, GL_COMPILE_STATUS, &status);
glGetShaderiv(handle, GL_INFO_LOG_LENGTH, &log_length);
}
if ((GLboolean)status == GL_FALSE) {
tlog::error() << "Failed to compile shader: " << desc;
}
if (log_length > 1) {
std::vector<char> log; log.resize(log_length+1);
if (program) {
glGetProgramInfoLog(handle, log_length, NULL, (GLchar*)log.data());
} else {
glGetShaderInfoLog(handle, log_length, NULL, (GLchar*)log.data());
}
log.back() = 0;
tlog::error() << log.data();
}
return (GLboolean)status == GL_TRUE;
}

uint32_t compile_shader(bool pixel, const char* code) {
GLuint g_VertHandle = glCreateShader(pixel ? GL_FRAGMENT_SHADER : GL_VERTEX_SHADER );
const char* glsl_version = "#version 140\n";
const GLchar* strings[2] = { glsl_version, code};
glShaderSource(g_VertHandle, 2, strings, NULL);
glCompileShader(g_VertHandle);
if (!check_shader(g_VertHandle, pixel? "pixel" : "vertex", false)) {
glDeleteShader(g_VertHandle);
return 0;
}
return g_VertHandle;
}

void draw_mesh_gl(
const GPUMemory<vec3>& verts,
const GPUMemory<vec3>& normals,
Expand Down Expand Up @@ -171,7 +103,7 @@ void draw_mesh_gl(
cudaGLUnmapBufferObject(els);

if (!program) {
vs = compile_shader(false, R"foo(
vs = compile_shader(eShaderType::Vertex, R"foo(
in vec3 pos;
in vec3 nor;
in vec3 col;
Expand All @@ -196,7 +128,7 @@ void main()
gl_Position = p;
}
)foo");
ps = compile_shader(true, R"foo(
ps = compile_shader(eShaderType::Fragment, R"foo(
out vec4 o;
in vec3 vtxcol;
uniform int mode;
Expand Down
78 changes: 78 additions & 0 deletions src/opengl_utils.cu
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@@ -0,0 +1,78 @@
#include <neural-graphics-primitives/opengl_utils.h>


#include <vector>

NGP_NAMESPACE_BEGIN
#ifdef NGP_GUI
void glCheckError(const char* file, unsigned int line) {
GLenum errorCode = glGetError();
while (errorCode != GL_NO_ERROR) {
std::string fileString(file);
std::string error = "unknown error";
// clang-format off
switch (errorCode) {
case GL_INVALID_ENUM: error = "GL_INVALID_ENUM"; break;
case GL_INVALID_VALUE: error = "GL_INVALID_VALUE"; break;
case GL_INVALID_OPERATION: error = "GL_INVALID_OPERATION"; break;
case GL_STACK_OVERFLOW: error = "GL_STACK_OVERFLOW"; break;
case GL_STACK_UNDERFLOW: error = "GL_STACK_UNDERFLOW"; break;
case GL_OUT_OF_MEMORY: error = "GL_OUT_OF_MEMORY"; break;
}
// clang-format on

tlog::error() << "OpenglError : file=" << file << " line=" << line << " error:" << error;
errorCode = glGetError();
}
}

bool check_shader(uint32_t handle, const char* desc, bool program) {
GLint status = 0, log_length = 0;
if (program) {
glGetProgramiv(handle, GL_LINK_STATUS, &status);
glGetProgramiv(handle, GL_INFO_LOG_LENGTH, &log_length);
} else {
glGetShaderiv(handle, GL_COMPILE_STATUS, &status);
glGetShaderiv(handle, GL_INFO_LOG_LENGTH, &log_length);
}
if ((GLboolean)status == GL_FALSE) {
tlog::error() << "Failed to compile shader: " << desc;
}
if (log_length > 1) {
std::vector<char> log; log.resize(log_length+1);
if (program) {
glGetProgramInfoLog(handle, log_length, NULL, (GLchar*)log.data());
} else {
glGetShaderInfoLog(handle, log_length, NULL, (GLchar*)log.data());
}
log.back() = 0;
tlog::error() << log.data();
}
return (GLboolean)status == GL_TRUE;
}

uint32_t compile_shader(eShaderType shader_type, const char* code) {
// translate enum to opengl shader type
GLenum shader_type_gl = 0;
std::string shader_type_str;
switch(shader_type) {
case eShaderType::Vertex: shader_type_gl = GL_VERTEX_SHADER; shader_type_str = "vertex"; break;
case eShaderType::Fragment: shader_type_gl = GL_FRAGMENT_SHADER; shader_type_str = "fragment"; break;
case eShaderType::Geometry: shader_type_gl = GL_GEOMETRY_SHADER; shader_type_str = "geometry"; break;
default: tlog::error() << "Unknown shader type"; return 0;
}

GLuint g_VertHandle = glCreateShader(shader_type_gl);
const char* glsl_version = "#version 140\n";
const GLchar* strings[2] = { glsl_version, code};
glShaderSource(g_VertHandle, 2, strings, NULL);
glCompileShader(g_VertHandle);
if (!check_shader(g_VertHandle, shader_type_str.c_str(), false)) {
glDeleteShader(g_VertHandle);
return 0;
}
return g_VertHandle;
}

#endif //NGP_GUI
NGP_NAMESPACE_END
5 changes: 3 additions & 2 deletions src/testbed.cu
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Expand Up @@ -25,6 +25,7 @@
#include <neural-graphics-primitives/trainable_buffer.cuh>
#include <neural-graphics-primitives/triangle_bvh.cuh>
#include <neural-graphics-primitives/triangle_octree.cuh>
#include <neural-graphics-primitives/opengl_utils.h>

#include <tiny-cuda-nn/encodings/grid.h>
#include <tiny-cuda-nn/loss.h>
Expand Down Expand Up @@ -2991,8 +2992,8 @@ void Testbed::create_second_window() {
void main(){\n\
fragColor = texture(screenTex, texCoords.xy);\n\
}";
vs = compile_shader(false, copy_shader_vert);
ps = compile_shader(true, copy_shader_frag);
vs = compile_shader(eShaderType::Vertex, copy_shader_vert);
ps = compile_shader(eShaderType::Fragment, copy_shader_frag);
}
m_second_window.window = glfwCreateWindow(win_w, win_h, "Fullscreen Output", NULL, m_glfw_window);
if (win_x!=0x40000000) glfwSetWindowPos(m_second_window.window, win_x, win_y);
Expand Down