bool GLRenderWindow::init()
{
checkGL();
// TODO: is this necessary?
if (!format().rgba())
Log.error() << "No RGBA mode for OpenGl available." << std::endl;
RenderWindow::init();
bool result = false;
FB_TEXTURE_TARGET = GL_TEXTURE_2D;
if(m_fmt.getPixelFormat() == PixelFormat::RGBF_96)
{
FB_INTERNAL_TEXTURE_FORMAT = GL_RGB;
FB_TEXTURE_FORMAT = GL_RGB;
FB_TEXTURE_DATATYPE = GL_FLOAT;
result = true;
}
else
{
if(m_fmt.getPixelFormat() == PixelFormat::RGBA_32)
{
FB_INTERNAL_TEXTURE_FORMAT = GL_RGBA;
FB_TEXTURE_FORMAT = GL_RGBA;
FB_TEXTURE_DATATYPE = GL_UNSIGNED_BYTE;
}
result = true;
}
return result;
}
void Framebuffer::bindDefault()
{
glBindFramebuffer(GL_FRAMEBUFFER, 0);
checkGL(glBindFramebuffer)
glViewport(0, 0, sDefaultWidth, sDefaultHeight);
checkGL(glViewport)
}
bool VertexBuffer::init(const VertexFormat& format, size_t count, BufferUsage usage)
{
m_format = format;
m_usage = usage;
m_count = count;
glGenBuffers(1, &m_bufferID);
m_context.setCurrentVertexBuffer(this);
glBufferData(GL_ARRAY_BUFFER,
m_count * m_format.size(),
nullptr,
convertToGL(m_usage));
if (!checkGL("Error during creation of vertex buffer of format %s",
m_format.asString().c_str()))
{
m_context.setCurrentVertexBuffer(nullptr);
return false;
}
if (RenderStats* stats = m_context.stats())
stats->addVertexBuffer(size());
return true;
}
bool IndexBuffer::init(size_t count, IndexBufferType type, BufferUsage usage)
{
m_type = type;
m_usage = usage;
m_count = count;
glGenBuffers(1, &m_bufferID);
m_context.setCurrentIndexBuffer(this);
glBufferData(GL_ELEMENT_ARRAY_BUFFER,
m_count * typeSize(m_type),
nullptr,
convertToGL(m_usage));
if (!checkGL("Error during creation of index buffer of element size %u",
(uint) typeSize(m_type)))
{
m_context.setCurrentIndexBuffer(nullptr);
return false;
}
if (RenderStats* stats = m_context.stats())
stats->addIndexBuffer(size());
return true;
}
void printShaderInfoLog(GLuint shader_index) {
char log[2048];
int actualLength = 0;
glGetShaderInfoLog(shader_index, sizeof(log), &actualLength, log);
checkGL();
std::cerr << "Shader info log for GL index " << shader_index << std::endl <<
log << std::endl;
}
void printProgramInfoLog(GLuint program) {
char log[2048];
int actualLength = 0;
glGetProgramInfoLog(program, sizeof(log), &actualLength, log);
checkGL();
std::cerr << "Program info log for GL index " << program << std::endl <<
log << std::endl;
}
void DefaultFramebuffer::apply() const
{
glBindFramebuffer(GL_FRAMEBUFFER, 0);
#if WENDY_DEBUG
checkGL("Error when applying default framebuffer");
#endif
}
GLuint compileShader(GLuint shaderType, const char** source) {
GLuint cs = glCreateShader(shaderType);
checkGL();
glShaderSource(cs, 1, source, 0);
checkGL();
glCompileShader(cs);
checkGL();
int params = -1;
glGetShaderiv(cs, GL_COMPILE_STATUS, ¶ms);
checkGL();
if(params != GL_TRUE) {
std::cerr << "ERROR: GL shader index " << cs << " did not compile" << std::endl;
printShaderInfoLog(cs);
return 0;
}
return cs;
}
bool OcclusionQuery::init()
{
glGenQueries(1, &m_queryID);
if (!checkGL("OpenGL error during creation of occlusion query object"))
return false;
return true;
}
int checkGlProgramLink(GLuint program) {
int params = -1;
glGetProgramiv(program, GL_LINK_STATUS, ¶ms);
checkGL();
if(params != GL_TRUE) {
std::cerr << "ERROR: could not link shader program with GL index " << program << std::endl;
printProgramInfoLog(program);
return 0;
}
return 1;
}
bool TextureFramebuffer::init()
{
glGenFramebuffers(1, &m_bufferID);
#if WENDY_DEBUG
if (!checkGL("Error during image framebuffer creation"))
return false;
#endif
return true;
}
void Framebuffer::detachTexture()
{
bind();
glFramebufferTexture2D(GL_FRAMEBUFFER, mTexture.get()->isDepth() ? GL_DEPTH_ATTACHMENT : GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, 0, 0);
if(mTexture.get()->isDepth())
makeRenderbuffer();
checkGL(glFramebufferTexture2D)
mTexture.reset();
}
OcclusionQuery::~OcclusionQuery()
{
if (m_active)
logError("Occlusion query destroyed while active");
if (m_queryID)
glDeleteQueries(1, &m_queryID);
#if NORI_DEBUG
checkGL("OpenGL error during occlusion query deletion");
#endif
}
void VertexBuffer::discard()
{
m_context.setCurrentVertexBuffer(this);
glBufferData(GL_ARRAY_BUFFER,
m_count * m_format.size(),
nullptr,
convertToGL(m_usage));
#if WENDY_DEBUG
checkGL("Error during vertex buffer discard");
#endif
}
bool compile_shaders(const char* vertex_shader_path, const char* fragment_shader_path,
GLint& shader_program, PreLinkCallback* cb) {
char* vertex_shader_source = 0;
if(readFile(vertex_shader_path, &vertex_shader_source) == -1) {
return false;
}
char* fragment_shader_source = 0;
if(readFile(fragment_shader_path, &fragment_shader_source) == -1) {
return false;
}
GLuint vs = compileShader(GL_VERTEX_SHADER, vertex_shader_source);
if(vs == 0) {
return false;
}
GLuint fs = compileShader(GL_FRAGMENT_SHADER, fragment_shader_source);
if(fs == 0) {
return false;
}
delete [] vertex_shader_source;
delete [] fragment_shader_source;
shader_program = glCreateProgram();
glAttachShader(shader_program, fs);
checkGL();
glAttachShader(shader_program, vs);
checkGL();
cb->preLinkCallback(shader_program);
glLinkProgram(shader_program);
checkGL();
if(checkGlProgramLink(shader_program) == 0) {
return false;
}
return true;
}
void Framebuffer::setSRGB(bool enabled)
{
if (m_sRGB == enabled)
return;
Framebuffer& previous = m_context.currentFramebuffer();
apply();
if (enabled)
{
glEnable(GL_FRAMEBUFFER_SRGB);
checkGL("Failed to enable framebuffer sRGB encoding");
}
else
{
glDisable(GL_FRAMEBUFFER_SRGB);
checkGL("Failed to disable framebuffer sRGB encoding");
}
m_sRGB = enabled;
previous.apply();
}
bool OcclusionQuery::hasResultAvailable() const
{
if (m_active)
return false;
int available;
glGetQueryObjectiv(m_queryID, GL_QUERY_RESULT_AVAILABLE, &available);
#if NORI_DEBUG
if (!checkGL("OpenGL error during occlusion query result availability check"))
return false;
#endif
return available ? true : false;
}
void Framebuffer::attachTexture(const std::shared_ptr<Texture>& texture)
{
bind();
#ifdef _WIN32
glDrawBuffer(GL_NONE);
checkGL(glDrawBuffer)
glReadBuffer(GL_NONE);
checkGL(glReadBuffer)
#endif
if(texture.get()->isDepth() && mDepthRenderBufferID != 0)
{
glDeleteRenderbuffers(1, &mDepthRenderBufferID);
checkGL(glDeleteRenderbuffers)
mDepthRenderBufferID = 0;
}
glFramebufferTexture2D(GL_FRAMEBUFFER, texture.get()->isDepth() ? GL_DEPTH_ATTACHMENT : GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, texture.get()->getID(), 0);
int error = glCheckFramebufferStatus(GL_FRAMEBUFFER);
if(error != GL_FRAMEBUFFER_COMPLETE)
{
printf("GL Framebuffer error: %i\n", error);
}
mTexture = texture;
}
void OcclusionQuery::begin()
{
if (m_active)
{
logError("Cannot begin already active occlusion query");
return;
}
glBeginQuery(GL_SAMPLES_PASSED, m_queryID);
m_active = true;
#if NORI_DEBUG
checkGL("OpenGL error during occlusion query begin");
#endif
}
void OcclusionQuery::end()
{
if (!m_active)
{
logError("Cannot end non-active occlusion query");
return;
}
glEndQuery(GL_SAMPLES_PASSED);
m_active = false;
#if NORI_DEBUG
checkGL("OpenGL error during occlusion query end");
#endif
}
void IndexBuffer::copyTo(void* target, size_t targetCount, size_t start)
{
if (start + targetCount > m_count)
{
logError("Too many indices requested from index buffer");
return;
}
m_context.setCurrentIndexBuffer(this);
const size_t size = typeSize(m_type);
glGetBufferSubData(GL_ELEMENT_ARRAY_BUFFER, start * size, targetCount * size, target);
#if WENDY_DEBUG
checkGL("Error during copy from index buffer");
#endif
}
void IndexBuffer::copyFrom(const void* source, size_t sourceCount, size_t start)
{
if (start + sourceCount > m_count)
{
logError("Too many indices submitted to index buffer");
return;
}
m_context.setCurrentIndexBuffer(this);
const size_t size = typeSize(m_type);
glBufferSubData(GL_ELEMENT_ARRAY_BUFFER, start * size, sourceCount * size, source);
#if WENDY_DEBUG
checkGL("Error during copy to index buffer");
#endif
}
void VertexBuffer::copyTo(void* target, size_t targetCount, size_t start)
{
if (start + targetCount > m_count)
{
logError("Too many vertices requested from vertex buffer");
return;
}
m_context.setCurrentVertexBuffer(this);
const size_t size = m_format.size();
glGetBufferSubData(GL_ARRAY_BUFFER, start * size, targetCount * size, target);
#if WENDY_DEBUG
checkGL("Error during copy from vertex buffer");
#endif
}
void VertexBuffer::copyFrom(const void* source, size_t sourceCount, size_t start)
{
if (start + sourceCount > m_count)
{
logError("Too many vertices submitted to vertex buffer");
return;
}
m_context.setCurrentVertexBuffer(this);
const size_t size = m_format.size();
glBufferSubData(GL_ARRAY_BUFFER, start * size, sourceCount * size, source);
#if WENDY_DEBUG
checkGL("Error during copy to vertex buffer");
#endif
}
uint OcclusionQuery::result() const
{
if (m_active)
{
logError("Cannot retrieve result of active occlusion query");
return 0;
}
uint result;
glGetQueryObjectuiv(m_queryID, GL_QUERY_RESULT, &result);
#if NORI_DEBUG
if (!checkGL("OpenGL error during occlusion query result retrieval"))
return 0;
#endif
return result;
}
Ref<Image> Framebuffer::data() const
{
Ref<Image> image = Image::create(m_context.cache(),
PixelFormat::RGB8,
width(), height());
if (!image)
return nullptr;
Framebuffer& previous = m_context.currentFramebuffer();
apply();
glPixelStorei(GL_PACK_ALIGNMENT, 1);
glReadPixels(0, 0, image->width(), image->height(),
GL_RGB, GL_UNSIGNED_BYTE,
image->pixels());
previous.apply();
if (!checkGL("Error when reading framebuffer data"))
return nullptr;
return image;
}
void TextureFramebuffer::apply() const
{
glBindFramebuffer(GL_FRAMEBUFFER, m_bufferID);
GLenum enables[5];
GLsizei count = 0;
for (size_t i = 0; i < sizeof(enables) / sizeof(enables[0]); i++)
{
Attachment attachment = (Attachment) i;
if (m_textures[i] && isColorAttachment(attachment))
enables[count++] = convertToGL(attachment);
}
if (count)
glDrawBuffers(count, enables);
else
glDrawBuffer(GL_NONE);
#if WENDY_DEBUG
checkGL("Error when applying image framebuffer");
#endif
}
void printGLInfo() {
std::cout << "Renderer: " << glGetString(GL_RENDERER) << std::endl;
checkGL();
std::cout << "OpenGL version supported: " << glGetString(GL_VERSION) << std::endl;
checkGL();
}
void printAll(GLuint program) {
std::cout << "*************** shader program " << program << " info ***************" << std::endl;
int params = -1;
glGetProgramiv(program, GL_LINK_STATUS, ¶ms);
checkGL();
std::cout << "GL_LINK_STATUS: " << params << std::endl;
glGetProgramiv(program, GL_ATTACHED_SHADERS, ¶ms);
checkGL();
std::cout << "GL_ATTACHED_SHADERS: " << params << std::endl;
glGetProgramiv(program, GL_ACTIVE_ATTRIBUTES, ¶ms);
checkGL();
std::cout << "GL_ACTIVE_ATTRIBUTES: " << params << std::endl;
int location = 0;
char name[64];
char longName[64];
int actualLength = 0;
int size = 0;
GLenum type;
for(int i = 0; i < params; ++i) {
glGetActiveAttrib(program, i, sizeof(name), &actualLength,
&size, &type, name);
checkGL();
if(size > 1) {
for(int j = 0; j < size; ++j) {
sprintf(longName, "%s[%i]", name, j);
location = glGetAttribLocation(program, longName);
checkGL();
std::cout << " " << i <<
") type: " << GLTypeToString(type) <<
" name: " << longName <<
" location: " << location << std::endl;
}
} else {
location = glGetAttribLocation(program, name);
checkGL();
std::cout << " " << i <<
") type: " << GLTypeToString(type) <<
" name: " << name <<
" location: " << location << std::endl;
}
}
glGetProgramiv(program, GL_ACTIVE_UNIFORMS, ¶ms);
checkGL();
std::cout << "GL_ACTIVE_UNIFORMS: " << params << std::endl;
for(int i = 0; i < params; ++i) {
glGetActiveUniform(program, i, sizeof(name), &actualLength,
&size, &type, name);
checkGL();
if(size > 1) {
for(int j = 0; j < size; ++j) {
sprintf(longName, "%s[%i]", name, j);
location = glGetUniformLocation(program, longName);
checkGL();
std::cout << " " << i <<
") type: " << GLTypeToString(type) <<
" name: " << longName <<
" location: " << location << std::endl;
}
} else {
location = glGetUniformLocation(program, name);
checkGL();
std::cout << " " << i <<
") type: " << GLTypeToString(type) <<
" name: " << name <<
" location: " << location << std::endl;
}
}
GLint blocks = 0;
glGetIntegerv(GL_MAX_UNIFORM_BUFFER_BINDINGS, &blocks);
checkGL();
std::cout << "GL_MAX_UNIFORM_BUFFER_BINDINGS = " << blocks << std::endl;
printProgramInfoLog(program);
}