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webgl.cc
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#include <cstring>
#include <vector>
#include <iostream>
#include "webgl.h"
bool WebGLRenderingContext::HAS_DISPLAY = false;
EGLDisplay WebGLRenderingContext::DISPLAY;
WebGLRenderingContext* WebGLRenderingContext::ACTIVE = NULL;
WebGLRenderingContext* WebGLRenderingContext::CONTEXT_LIST_HEAD = NULL;
const char* REQUIRED_EXTENSIONS[] = {
"GL_OES_packed_depth_stencil",
"GL_ANGLE_instanced_arrays",
NULL
};
#define GL_METHOD(method_name) NAN_METHOD(WebGLRenderingContext:: method_name)
#define GL_BOILERPLATE \
Nan::HandleScope();\
if (info.This()->InternalFieldCount() <= 0) { \
return Nan::ThrowError("Invalid WebGL Object"); \
} \
WebGLRenderingContext* inst = \
node::ObjectWrap::Unwrap<WebGLRenderingContext>(info.This()); \
if (!(inst && inst->setActive())) { \
return Nan::ThrowError("Invalid GL context"); \
}
WebGLRenderingContext::WebGLRenderingContext(
int width
, int height
, bool alpha
, bool depth
, bool stencil
, bool antialias
, bool premultipliedAlpha
, bool preserveDrawingBuffer
, bool preferLowPowerToHighPerformance
, bool failIfMajorPerformanceCaveat) :
state(GLCONTEXT_STATE_INIT)
, unpack_flip_y(false)
, unpack_premultiply_alpha(false)
, unpack_colorspace_conversion(0x9244)
, unpack_alignment(4)
, next(NULL)
, prev(NULL)
, lastError(GL_NO_ERROR) {
//Get display
if (!HAS_DISPLAY) {
DISPLAY = eglGetDisplay(EGL_DEFAULT_DISPLAY);
if (DISPLAY == EGL_NO_DISPLAY) {
state = GLCONTEXT_STATE_ERROR;
return;
}
//Initialize EGL
if (!eglInitialize(DISPLAY, NULL, NULL)) {
state = GLCONTEXT_STATE_ERROR;
return;
}
//Save display
HAS_DISPLAY = true;
}
//Set up configuration
EGLint attrib_list[] = {
EGL_SURFACE_TYPE, EGL_PBUFFER_BIT
, EGL_RED_SIZE, 8
, EGL_GREEN_SIZE, 8
, EGL_BLUE_SIZE, 8
, EGL_ALPHA_SIZE, 8
, EGL_DEPTH_SIZE, 24
, EGL_STENCIL_SIZE, 8
, EGL_NONE
};
EGLint num_config;
if (!eglChooseConfig(
DISPLAY,
attrib_list,
&config,
1,
&num_config) ||
num_config != 1) {
state = GLCONTEXT_STATE_ERROR;
return;
}
//Create context
EGLint contextAttribs[] = {
EGL_CONTEXT_CLIENT_VERSION, 2,
EGL_NONE
};
context = eglCreateContext(DISPLAY, config, EGL_NO_CONTEXT, contextAttribs);
if (context == EGL_NO_CONTEXT) {
state = GLCONTEXT_STATE_ERROR;
return;
}
EGLint surfaceAttribs[] = {
EGL_WIDTH, (EGLint)width
, EGL_HEIGHT, (EGLint)height
, EGL_NONE
};
surface = eglCreatePbufferSurface(DISPLAY, config, surfaceAttribs);
if (surface == EGL_NO_SURFACE) {
state = GLCONTEXT_STATE_ERROR;
return;
}
//Set active
if (!eglMakeCurrent(DISPLAY, surface, surface, context)) {
state = GLCONTEXT_STATE_ERROR;
return;
}
//Success
state = GLCONTEXT_STATE_OK;
registerContext();
ACTIVE = this;
//Initialize function pointers
initPointers();
//Check extensions
const char *extensionString = (const char*)((glGetString)(GL_EXTENSIONS));
//Load required extensions
for(const char** rext = REQUIRED_EXTENSIONS; *rext; ++rext) {
if(!strstr(extensionString, *rext)) {
dispose();
state = GLCONTEXT_STATE_ERROR;
return;
}
}
//Select best preferred depth
preferredDepth = GL_DEPTH_COMPONENT16;
if(strstr(extensionString, "GL_OES_depth32")) {
preferredDepth = GL_DEPTH_COMPONENT32_OES;
} else if(strstr(extensionString, "GL_OES_depth24")) {
preferredDepth = GL_DEPTH_COMPONENT24_OES;
}
}
bool WebGLRenderingContext::setActive() {
if (state != GLCONTEXT_STATE_OK) {
return false;
}
if (this == ACTIVE) {
return true;
}
if (!eglMakeCurrent(DISPLAY, surface, surface, context)) {
state = GLCONTEXT_STATE_ERROR;
return false;
}
ACTIVE = this;
return true;
}
void WebGLRenderingContext::setError(GLenum error) {
if (error == GL_NO_ERROR || lastError != GL_NO_ERROR) {
return;
}
GLenum prevError = (this->glGetError)();
if (prevError == GL_NO_ERROR) {
lastError = error;
}
}
void WebGLRenderingContext::dispose() {
//Unregister context
unregisterContext();
if (!setActive()) {
state = GLCONTEXT_STATE_ERROR;
return;
}
//Update state
state = GLCONTEXT_STATE_DESTROY;
//Store this pointer
WebGLRenderingContext* inst = this;
//Destroy all object references
for (
std::map< std::pair<GLuint, GLObjectType>, bool >::iterator
iter = objects.begin();
iter != objects.end();
++iter) {
GLuint obj = iter->first.first;
switch(iter->first.second) {
case GLOBJECT_TYPE_PROGRAM:
(inst->glDeleteProgram)(obj);
break;
case GLOBJECT_TYPE_BUFFER:
(inst->glDeleteBuffers)(1,&obj);
break;
case GLOBJECT_TYPE_FRAMEBUFFER:
(inst->glDeleteFramebuffers)(1,&obj);
break;
case GLOBJECT_TYPE_RENDERBUFFER:
(inst->glDeleteRenderbuffers)(1,&obj);
break;
case GLOBJECT_TYPE_SHADER:
(inst->glDeleteShader)(obj);
break;
case GLOBJECT_TYPE_TEXTURE:
(inst->glDeleteTextures)(1,&obj);
break;
default:
break;
}
}
//Deactivate context
eglMakeCurrent(DISPLAY, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
ACTIVE = NULL;
//Destroy surface and context
//FIXME: This shouldn't be commented out
//eglDestroySurface(DISPLAY, surface);
eglDestroyContext(DISPLAY, context);
}
WebGLRenderingContext::~WebGLRenderingContext() {
dispose();
}
GL_METHOD(SetError) {
GL_BOILERPLATE;
inst->setError((GLenum)(Nan::To<int32_t>(info[0]).ToChecked()));
}
GL_METHOD(DisposeAll) {
Nan::HandleScope();
while(CONTEXT_LIST_HEAD) {
CONTEXT_LIST_HEAD->dispose();
}
if(WebGLRenderingContext::HAS_DISPLAY) {
eglTerminate(WebGLRenderingContext::DISPLAY);
WebGLRenderingContext::HAS_DISPLAY = false;
}
}
GL_METHOD(New) {
Nan::HandleScope();
WebGLRenderingContext* instance = new WebGLRenderingContext(
Nan::To<int32_t>(info[0]).ToChecked() //Width
, Nan::To<int32_t>(info[1]).ToChecked() //Height
, (Nan::To<bool>(info[2]).ToChecked()) //Alpha
, (Nan::To<bool>(info[3]).ToChecked()) //Depth
, (Nan::To<bool>(info[4]).ToChecked()) //Stencil
, (Nan::To<bool>(info[5]).ToChecked()) //antialias
, (Nan::To<bool>(info[6]).ToChecked()) //premultipliedAlpha
, (Nan::To<bool>(info[7]).ToChecked()) //preserve drawing buffer
, (Nan::To<bool>(info[8]).ToChecked()) //low power
, (Nan::To<bool>(info[9]).ToChecked()) //fail if crap
);
if(instance->state != GLCONTEXT_STATE_OK){
return Nan::ThrowError("Error creating WebGLContext");
}
instance->Wrap(info.This());
info.GetReturnValue().Set(info.This());
}
GL_METHOD(Destroy) {
GL_BOILERPLATE
inst->dispose();
}
GL_METHOD(Uniform1f) {
GL_BOILERPLATE;
int location = Nan::To<int32_t>(info[0]).ToChecked();
float x = (float) Nan::To<double>(info[1]).ToChecked();
(inst->glUniform1f)(location, x);
}
GL_METHOD(Uniform2f) {
GL_BOILERPLATE;
GLint location = Nan::To<int32_t>(info[0]).ToChecked();
GLfloat x = static_cast<GLfloat>(Nan::To<double>(info[1]).ToChecked());
GLfloat y = static_cast<GLfloat>(Nan::To<double>(info[2]).ToChecked());
(inst->glUniform2f)(location, x, y);
}
GL_METHOD(Uniform3f) {
GL_BOILERPLATE;
GLint location = Nan::To<int32_t>(info[0]).ToChecked();
GLfloat x = static_cast<GLfloat>(Nan::To<double>(info[1]).ToChecked());
GLfloat y = static_cast<GLfloat>(Nan::To<double>(info[2]).ToChecked());
GLfloat z = static_cast<GLfloat>(Nan::To<double>(info[3]).ToChecked());
(inst->glUniform3f)(location, x, y, z);
}
GL_METHOD(Uniform4f) {
GL_BOILERPLATE;
GLint location = Nan::To<int32_t>(info[0]).ToChecked();
GLfloat x = static_cast<GLfloat>(Nan::To<double>(info[1]).ToChecked());
GLfloat y = static_cast<GLfloat>(Nan::To<double>(info[2]).ToChecked());
GLfloat z = static_cast<GLfloat>(Nan::To<double>(info[3]).ToChecked());
GLfloat w = static_cast<GLfloat>(Nan::To<double>(info[4]).ToChecked());
(inst->glUniform4f)(location, x, y, z, w);
}
GL_METHOD(Uniform1i) {
GL_BOILERPLATE;
GLint location = Nan::To<int32_t>(info[0]).ToChecked();
GLint x = Nan::To<int32_t>(info[1]).ToChecked();
(inst->glUniform1i)(location, x);
}
GL_METHOD(Uniform2i) {
GL_BOILERPLATE;
GLint location = Nan::To<int32_t>(info[0]).ToChecked();
GLint x = Nan::To<int32_t>(info[1]).ToChecked();
GLint y = Nan::To<int32_t>(info[2]).ToChecked();
(inst->glUniform2i)(location, x, y);
}
GL_METHOD(Uniform3i) {
GL_BOILERPLATE;
GLint location = Nan::To<int32_t>(info[0]).ToChecked();
GLint x = Nan::To<int32_t>(info[1]).ToChecked();
GLint y = Nan::To<int32_t>(info[2]).ToChecked();
GLint z = Nan::To<int32_t>(info[3]).ToChecked();
(inst->glUniform3i)(location, x, y, z);
}
GL_METHOD(Uniform4i) {
GL_BOILERPLATE;
GLint location = Nan::To<int32_t>(info[0]).ToChecked();
GLint x = Nan::To<int32_t>(info[1]).ToChecked();
GLint y = Nan::To<int32_t>(info[2]).ToChecked();
GLint z = Nan::To<int32_t>(info[3]).ToChecked();
GLint w = Nan::To<int32_t>(info[4]).ToChecked();
(inst->glUniform4i)(location, x, y, z, w);
}
GL_METHOD(PixelStorei) {
GL_BOILERPLATE;
GLenum pname = Nan::To<int32_t>(info[0]).ToChecked();
GLenum param = Nan::To<int32_t>(info[1]).ToChecked();
//Handle WebGL specific extensions
switch(pname) {
case 0x9240:
inst->unpack_flip_y = param != 0;
break;
case 0x9241:
inst->unpack_premultiply_alpha = param != 0;
break;
case 0x9243:
inst->unpack_colorspace_conversion = param;
break;
case GL_UNPACK_ALIGNMENT:
inst->unpack_alignment = param;
(inst->glPixelStorei)(pname, param);
break;
case GL_MAX_DRAW_BUFFERS_EXT:
(inst->glPixelStorei)(pname, param);
break;
default:
(inst->glPixelStorei)(pname, param);
break;
}
}
GL_METHOD(BindAttribLocation) {
GL_BOILERPLATE;
GLint program = Nan::To<int32_t>(info[0]).ToChecked();
GLint index = Nan::To<int32_t>(info[1]).ToChecked();
Nan::Utf8String name(info[2]);
(inst->glBindAttribLocation)(program, index, *name);
}
GLenum WebGLRenderingContext::getError() {
GLenum error = (this->glGetError)();
if (lastError != GL_NO_ERROR) {
error = lastError;
}
lastError = GL_NO_ERROR;
return error;
}
GL_METHOD(GetError) {
GL_BOILERPLATE;
info.GetReturnValue().Set(Nan::New<v8::Integer>(inst->getError()));
}
GL_METHOD(VertexAttribDivisor) {
GL_BOILERPLATE;
GLuint index = Nan::To<uint32_t>(info[0]).ToChecked();
GLuint divisor = Nan::To<uint32_t>(info[1]).ToChecked();
(inst->glVertexAttribDivisor)(index, divisor);
}
GL_METHOD(DrawArraysInstanced) {
GL_BOILERPLATE;
GLenum mode = Nan::To<int32_t>(info[0]).ToChecked();
GLint first = Nan::To<int32_t>(info[1]).ToChecked();
GLuint count = Nan::To<uint32_t>(info[2]).ToChecked();
GLuint icount = Nan::To<uint32_t>(info[3]).ToChecked();
(inst->glDrawArraysInstanced)(mode, first, count, icount);
}
GL_METHOD(DrawElementsInstanced) {
GL_BOILERPLATE;
GLenum mode = Nan::To<int32_t>(info[0]).ToChecked();
GLint count = Nan::To<int32_t>(info[1]).ToChecked();
GLenum type = Nan::To<int32_t>(info[2]).ToChecked();
GLint offset = Nan::To<int32_t>(info[3]).ToChecked();
GLuint icount = Nan::To<uint32_t>(info[4]).ToChecked();
(inst->glDrawElementsInstanced)(
mode,
count,
type,
reinterpret_cast<GLvoid*>(offset),
icount);
}
GL_METHOD(DrawArrays) {
GL_BOILERPLATE;
GLenum mode = Nan::To<int32_t>(info[0]).ToChecked();
GLint first = Nan::To<int32_t>(info[1]).ToChecked();
GLint count = Nan::To<int32_t>(info[2]).ToChecked();
(inst->glDrawArrays)(mode, first, count);
}
GL_METHOD(UniformMatrix2fv) {
GL_BOILERPLATE;
GLint location = Nan::To<int32_t>(info[0]).ToChecked();
GLboolean transpose = (Nan::To<bool>(info[1]).ToChecked());
Nan::TypedArrayContents<GLfloat> data(info[2]);
(inst->glUniformMatrix2fv)(location, data.length() / 4, transpose, *data);
}
GL_METHOD(UniformMatrix3fv) {
GL_BOILERPLATE;
GLint location = Nan::To<int32_t>(info[0]).ToChecked();
GLboolean transpose = (Nan::To<bool>(info[1]).ToChecked());
Nan::TypedArrayContents<GLfloat> data(info[2]);
(inst->glUniformMatrix3fv)(location, data.length() / 9, transpose, *data);
}
GL_METHOD(UniformMatrix4fv) {
GL_BOILERPLATE;
GLint location = Nan::To<int32_t>(info[0]).ToChecked();
GLboolean transpose = (Nan::To<bool>(info[1]).ToChecked());
Nan::TypedArrayContents<GLfloat> data(info[2]);
(inst->glUniformMatrix4fv)(location, data.length() / 16, transpose, *data);
}
GL_METHOD(GenerateMipmap) {
GL_BOILERPLATE;
GLint target = Nan::To<int32_t>(info[0]).ToChecked();
(inst->glGenerateMipmap)(target);
}
GL_METHOD(GetAttribLocation) {
GL_BOILERPLATE;
GLint program = Nan::To<int32_t>(info[0]).ToChecked();
Nan::Utf8String name(info[1]);
GLint result = (inst->glGetAttribLocation)(program, *name);
info.GetReturnValue().Set(Nan::New<v8::Integer>(result));
}
GL_METHOD(DepthFunc) {
GL_BOILERPLATE;
(inst->glDepthFunc)(Nan::To<int32_t>(info[0]).ToChecked());
}
GL_METHOD(Viewport) {
GL_BOILERPLATE;
GLint x = Nan::To<int32_t>(info[0]).ToChecked();
GLint y = Nan::To<int32_t>(info[1]).ToChecked();
GLsizei width = Nan::To<int32_t>(info[2]).ToChecked();
GLsizei height = Nan::To<int32_t>(info[3]).ToChecked();
(inst->glViewport)(x, y, width, height);
}
GL_METHOD(CreateShader) {
GL_BOILERPLATE;
GLuint shader=(inst->glCreateShader)(Nan::To<int32_t>(info[0]).ToChecked());
inst->registerGLObj(GLOBJECT_TYPE_SHADER, shader);
info.GetReturnValue().Set(Nan::New<v8::Integer>(shader));
}
GL_METHOD(ShaderSource) {
GL_BOILERPLATE;
GLint id = Nan::To<int32_t>(info[0]).ToChecked();
Nan::Utf8String code(info[1]);
const char* codes[] = { *code };
GLint length = code.length();
(inst->glShaderSource)(id, 1, codes, &length);
}
GL_METHOD(CompileShader) {
GL_BOILERPLATE;
(inst->glCompileShader)(Nan::To<int32_t>(info[0]).ToChecked());
}
GL_METHOD(FrontFace) {
GL_BOILERPLATE;
(inst->glFrontFace)(Nan::To<int32_t>(info[0]).ToChecked());
}
GL_METHOD(GetShaderParameter) {
GL_BOILERPLATE;
GLint shader = Nan::To<int32_t>(info[0]).ToChecked();
GLenum pname = Nan::To<int32_t>(info[1]).ToChecked();
GLint value;
(inst->glGetShaderiv)(shader, pname, &value);
info.GetReturnValue().Set(Nan::New<v8::Integer>(value));
}
GL_METHOD(GetShaderInfoLog) {
GL_BOILERPLATE;
GLint id = Nan::To<int32_t>(info[0]).ToChecked();
GLint infoLogLength;
(inst->glGetShaderiv)(id, GL_INFO_LOG_LENGTH, &infoLogLength);
char* error = new char[infoLogLength+1];
(inst->glGetShaderInfoLog)(id, infoLogLength+1, &infoLogLength, error);
info.GetReturnValue().Set(
Nan::New<v8::String>(error).ToLocalChecked());
delete[] error;
}
GL_METHOD(CreateProgram) {
GL_BOILERPLATE;
GLuint program=(inst->glCreateProgram)();
inst->registerGLObj(GLOBJECT_TYPE_PROGRAM, program);
info.GetReturnValue().Set(Nan::New<v8::Integer>(program));
}
GL_METHOD(AttachShader) {
GL_BOILERPLATE;
GLint program = Nan::To<int32_t>(info[0]).ToChecked();
GLint shader = Nan::To<int32_t>(info[1]).ToChecked();
(inst->glAttachShader)(program, shader);
}
GL_METHOD(ValidateProgram) {
GL_BOILERPLATE;
(inst->glValidateProgram)(Nan::To<int32_t>(info[0]).ToChecked());
}
GL_METHOD(LinkProgram) {
GL_BOILERPLATE;
(inst->glLinkProgram)(Nan::To<int32_t>(info[0]).ToChecked());
}
GL_METHOD(GetProgramParameter) {
GL_BOILERPLATE;
GLint program = Nan::To<int32_t>(info[0]).ToChecked();
GLenum pname = (GLenum)(Nan::To<int32_t>(info[1]).ToChecked());
GLint value = 0;
(inst->glGetProgramiv)(program, pname, &value);
info.GetReturnValue().Set(Nan::New<v8::Integer>(value));
}
GL_METHOD(GetUniformLocation) {
GL_BOILERPLATE;
GLint program = Nan::To<int32_t>(info[0]).ToChecked();
Nan::Utf8String name(info[1]);
info.GetReturnValue().Set(Nan::New<v8::Integer>(
(inst->glGetUniformLocation)(program, *name)));
}
GL_METHOD(ClearColor) {
GL_BOILERPLATE;
GLfloat red = static_cast<GLfloat>(Nan::To<double>(info[0]).ToChecked());
GLfloat green = static_cast<GLfloat>(Nan::To<double>(info[1]).ToChecked());
GLfloat blue = static_cast<GLfloat>(Nan::To<double>(info[2]).ToChecked());
GLfloat alpha = static_cast<GLfloat>(Nan::To<double>(info[3]).ToChecked());
(inst->glClearColor)(red, green, blue, alpha);
}
GL_METHOD(ClearDepth) {
GL_BOILERPLATE;
GLfloat depth = static_cast<GLfloat>(Nan::To<double>(info[0]).ToChecked());
(inst->glClearDepthf)(depth);
}
GL_METHOD(Disable) {
GL_BOILERPLATE;
(inst->glDisable)(Nan::To<int32_t>(info[0]).ToChecked());
}
GL_METHOD(Enable) {
GL_BOILERPLATE;
(inst->glEnable)(Nan::To<int32_t>(info[0]).ToChecked());
}
GL_METHOD(CreateTexture) {
GL_BOILERPLATE;
GLuint texture;
(inst->glGenTextures)(1, &texture);
inst->registerGLObj(GLOBJECT_TYPE_TEXTURE, texture);
info.GetReturnValue().Set(Nan::New<v8::Integer>(texture));
}
GL_METHOD(BindTexture) {
GL_BOILERPLATE;
GLenum target = Nan::To<int32_t>(info[0]).ToChecked();
GLint texture = Nan::To<int32_t>(info[1]).ToChecked();
(inst->glBindTexture)(target, texture);
}
unsigned char* WebGLRenderingContext::unpackPixels(
GLenum type,
GLenum format,
GLint width,
GLint height,
unsigned char* pixels) {
//Compute pixel size
GLint pixelSize = 1;
if(type == GL_UNSIGNED_BYTE || type == GL_FLOAT) {
if(type == GL_FLOAT) {
pixelSize = 4;
}
switch(format) {
case GL_ALPHA:
case GL_LUMINANCE:
break;
case GL_LUMINANCE_ALPHA:
pixelSize *= 2;
break;
case GL_RGB:
pixelSize *= 3;
break;
case GL_RGBA:
pixelSize *= 4;
break;
}
} else {
pixelSize = 2;
}
//Compute row stride
GLint rowStride = pixelSize * width;
if((rowStride % unpack_alignment) != 0) {
rowStride += unpack_alignment - (rowStride % unpack_alignment);
}
GLint imageSize = rowStride * height;
unsigned char* unpacked = new unsigned char[imageSize];
if(unpack_flip_y) {
for(int i=0,j=height-1; j>=0; ++i, --j) {
memcpy(
reinterpret_cast<void*>(unpacked + j*rowStride)
, reinterpret_cast<void*>(pixels + i*rowStride)
, width * pixelSize);
}
} else {
memcpy(
reinterpret_cast<void*>(unpacked)
, reinterpret_cast<void*>(pixels)
, imageSize);
}
//Premultiply alpha unpacking
if(unpack_premultiply_alpha &&
(format == GL_LUMINANCE_ALPHA ||
format == GL_RGBA)) {
for(int row=0; row<height; ++row) {
for(int col=0; col<width; ++col) {
unsigned char* pixel = unpacked + (row * rowStride) + (col * pixelSize);
if(format == GL_LUMINANCE_ALPHA) {
pixel[0] *= pixel[1] / 255.0;
} else if(type == GL_UNSIGNED_BYTE) {
float scale = pixel[3] / 255.0;
pixel[0] *= scale;
pixel[1] *= scale;
pixel[2] *= scale;
} else if(type == GL_UNSIGNED_SHORT_4_4_4_4) {
int r = pixel[0]&0x0f;
int g = pixel[0]>>4;
int b = pixel[1]&0x0f;
int a = pixel[1]>>4;
float scale = a / 15.0;
r *= scale;
g *= scale;
b *= scale;
pixel[0] = r + (g<<4);
pixel[1] = b + (a<<4);
} else if(type == GL_UNSIGNED_SHORT_5_5_5_1) {
if((pixel[0]&1) == 0) {
pixel[0] = 1; //why does this get set to 1?!?!?!
pixel[1] = 0;
}
}
}
}
}
return unpacked;
}
GL_METHOD(TexImage2D) {
GL_BOILERPLATE;
GLenum target = Nan::To<int32_t>(info[0]).ToChecked();
GLint level = Nan::To<int32_t>(info[1]).ToChecked();
GLenum internalformat = Nan::To<int32_t>(info[2]).ToChecked();
GLsizei width = Nan::To<int32_t>(info[3]).ToChecked();
GLsizei height = Nan::To<int32_t>(info[4]).ToChecked();
GLint border = Nan::To<int32_t>(info[5]).ToChecked();
GLenum format = Nan::To<int32_t>(info[6]).ToChecked();
GLint type = Nan::To<int32_t>(info[7]).ToChecked();
Nan::TypedArrayContents<unsigned char> pixels(info[8]);
if(*pixels) {
if(inst->unpack_flip_y || inst->unpack_premultiply_alpha) {
unsigned char* unpacked = inst->unpackPixels(
type
, format
, width
, height
, *pixels);
(inst->glTexImage2D)(
target
, level
, internalformat
, width
, height
, border
, format
, type
, unpacked);
delete[] unpacked;
} else {
(inst->glTexImage2D)(
target
, level
, internalformat
, width
, height
, border
, format
, type
, *pixels);
}
} else {
size_t length = width * height * 4;
if(type == GL_FLOAT) {
length *= 4;
}
char* data = new char[length];
memset(data, 0, length);
(inst->glTexImage2D)(
target
, level
, internalformat
, width
, height
, border
, format
, type
, data);
delete[] data;
}
}
GL_METHOD(TexSubImage2D) {
GL_BOILERPLATE;
GLenum target = Nan::To<int32_t>(info[0]).ToChecked();
GLint level = Nan::To<int32_t>(info[1]).ToChecked();
GLint xoffset = Nan::To<int32_t>(info[2]).ToChecked();
GLint yoffset = Nan::To<int32_t>(info[3]).ToChecked();
GLsizei width = Nan::To<int32_t>(info[4]).ToChecked();
GLsizei height = Nan::To<int32_t>(info[5]).ToChecked();
GLenum format = Nan::To<int32_t>(info[6]).ToChecked();
GLenum type = Nan::To<int32_t>(info[7]).ToChecked();
Nan::TypedArrayContents<unsigned char> pixels(info[8]);
if(inst->unpack_flip_y ||
inst->unpack_premultiply_alpha) {
unsigned char* unpacked = inst->unpackPixels(
type
, format
, width
, height
, *pixels);
(inst->glTexSubImage2D)(
target
, level
, xoffset
, yoffset
, width
, height
, format
, type
, unpacked);
delete[] unpacked;
} else {
(inst->glTexSubImage2D)(
target
, level
, xoffset
, yoffset
, width
, height
, format
, type
, *pixels);
}
}
GL_METHOD(TexParameteri) {
GL_BOILERPLATE;
GLenum target = Nan::To<int32_t>(info[0]).ToChecked();
GLenum pname = Nan::To<int32_t>(info[1]).ToChecked();
GLint param = Nan::To<int32_t>(info[2]).ToChecked();
(inst->glTexParameteri)(target, pname, param);
}
GL_METHOD(TexParameterf) {
GL_BOILERPLATE;
GLenum target = Nan::To<int32_t>(info[0]).ToChecked();
GLenum pname = Nan::To<int32_t>(info[1]).ToChecked();
GLfloat param = static_cast<GLfloat>(Nan::To<double>(info[2]).ToChecked());
(inst->glTexParameterf)(target, pname, param);
}
GL_METHOD(Clear) {
GL_BOILERPLATE;
(inst->glClear)(Nan::To<int32_t>(info[0]).ToChecked());
}
GL_METHOD(UseProgram) {
GL_BOILERPLATE;
(inst->glUseProgram)(Nan::To<int32_t>(info[0]).ToChecked());
}
GL_METHOD(CreateBuffer) {
GL_BOILERPLATE;
GLuint buffer;
(inst->glGenBuffers)(1, &buffer);
inst->registerGLObj(GLOBJECT_TYPE_BUFFER, buffer);
info.GetReturnValue().Set(Nan::New<v8::Integer>(buffer));
}
GL_METHOD(BindBuffer) {
GL_BOILERPLATE;
GLenum target = (GLenum)Nan::To<int32_t>(info[0]).ToChecked();
GLuint buffer = (GLuint)Nan::To<uint32_t>(info[1]).ToChecked();
(inst->glBindBuffer)(target,buffer);
}
GL_METHOD(CreateFramebuffer) {
GL_BOILERPLATE;
GLuint buffer;
(inst->glGenFramebuffers)(1, &buffer);
inst->registerGLObj(GLOBJECT_TYPE_FRAMEBUFFER, buffer);
info.GetReturnValue().Set(Nan::New<v8::Integer>(buffer));
}
GL_METHOD(BindFramebuffer) {
GL_BOILERPLATE;
GLint target = (GLint)Nan::To<int32_t>(info[0]).ToChecked();
GLint buffer = (GLint)(Nan::To<int32_t>(info[1]).ToChecked());
(inst->glBindFramebuffer)(target, buffer);
}