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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "WebGL2Context.h"
#include "GLContext.h"
#include "GLScreenBuffer.h"
#include "WebGLBuffer.h"
#include "WebGLContextUtils.h"
#include "WebGLFramebuffer.h"
#include "WebGLSampler.h"
#include "WebGLTransformFeedback.h"
#include "WebGLVertexArray.h"
namespace mozilla {
JS::Value
WebGL2Context::GetParameter(JSContext* cx, GLenum pname, ErrorResult& rv)
{
// The following cases are handled in WebGLContext::GetParameter():
// case LOCAL_GL_MAX_COLOR_ATTACHMENTS:
// case LOCAL_GL_MAX_DRAW_BUFFERS:
// case LOCAL_GL_DRAW_BUFFERi:
if (IsContextLost())
return JS::NullValue();
MakeContextCurrent();
switch (pname) {
/* GLboolean */
case LOCAL_GL_RASTERIZER_DISCARD:
case LOCAL_GL_SAMPLE_ALPHA_TO_COVERAGE:
case LOCAL_GL_SAMPLE_COVERAGE: {
realGLboolean b = 0;
gl->fGetBooleanv(pname, &b);
return JS::BooleanValue(bool(b));
}
case LOCAL_GL_TRANSFORM_FEEDBACK_ACTIVE:
return JS::BooleanValue(mBoundTransformFeedback->mIsActive);
case LOCAL_GL_TRANSFORM_FEEDBACK_PAUSED:
return JS::BooleanValue(mBoundTransformFeedback->mIsPaused);
/* GLenum */
case LOCAL_GL_READ_BUFFER: {
if (!mBoundReadFramebuffer)
return JS::Int32Value(gl->Screen()->GetReadBufferMode());
if (!mBoundReadFramebuffer->ColorReadBuffer())
return JS::Int32Value(LOCAL_GL_NONE);
return JS::Int32Value(mBoundReadFramebuffer->ColorReadBuffer()->mAttachmentPoint);
}
case LOCAL_GL_FRAGMENT_SHADER_DERIVATIVE_HINT:
/* fall through */
/* GLint */
case LOCAL_GL_MAX_COMBINED_UNIFORM_BLOCKS:
case LOCAL_GL_MAX_ELEMENTS_INDICES:
case LOCAL_GL_MAX_ELEMENTS_VERTICES:
case LOCAL_GL_MAX_FRAGMENT_INPUT_COMPONENTS:
case LOCAL_GL_MAX_FRAGMENT_UNIFORM_BLOCKS:
case LOCAL_GL_MAX_FRAGMENT_UNIFORM_COMPONENTS:
case LOCAL_GL_MAX_PROGRAM_TEXEL_OFFSET:
case LOCAL_GL_MAX_SAMPLES:
case LOCAL_GL_MAX_TEXTURE_LOD_BIAS:
case LOCAL_GL_MAX_TRANSFORM_FEEDBACK_INTERLEAVED_COMPONENTS:
case LOCAL_GL_MAX_TRANSFORM_FEEDBACK_SEPARATE_ATTRIBS:
case LOCAL_GL_MAX_TRANSFORM_FEEDBACK_SEPARATE_COMPONENTS:
case LOCAL_GL_MAX_UNIFORM_BUFFER_BINDINGS:
case LOCAL_GL_MAX_VERTEX_OUTPUT_COMPONENTS:
case LOCAL_GL_MAX_VERTEX_UNIFORM_BLOCKS:
case LOCAL_GL_MAX_VERTEX_UNIFORM_COMPONENTS:
case LOCAL_GL_MIN_PROGRAM_TEXEL_OFFSET:
case LOCAL_GL_PACK_ROW_LENGTH:
case LOCAL_GL_PACK_SKIP_PIXELS:
case LOCAL_GL_PACK_SKIP_ROWS:
case LOCAL_GL_UNIFORM_BUFFER_OFFSET_ALIGNMENT:
case LOCAL_GL_UNPACK_IMAGE_HEIGHT:
case LOCAL_GL_UNPACK_ROW_LENGTH: {
GLint val;
gl->fGetIntegerv(pname, &val);
return JS::Int32Value(val);
}
case LOCAL_GL_UNPACK_SKIP_IMAGES:
return JS::Int32Value(mPixelStore_UnpackSkipImages);
case LOCAL_GL_UNPACK_SKIP_PIXELS:
return JS::Int32Value(mPixelStore_UnpackSkipPixels);
case LOCAL_GL_UNPACK_SKIP_ROWS:
return JS::Int32Value(mPixelStore_UnpackSkipRows);
case LOCAL_GL_MAX_3D_TEXTURE_SIZE:
return JS::Int32Value(mImplMax3DTextureSize);
case LOCAL_GL_MAX_ARRAY_TEXTURE_LAYERS:
return JS::Int32Value(mImplMaxArrayTextureLayers);
case LOCAL_GL_MAX_VARYING_COMPONENTS: {
// On OS X Core Profile this is buggy. The spec says that the
// value is 4 * GL_MAX_VARYING_VECTORS
GLint val;
gl->fGetIntegerv(LOCAL_GL_MAX_VARYING_VECTORS, &val);
return JS::Int32Value(4*val);
}
/* GLint64 */
case LOCAL_GL_MAX_CLIENT_WAIT_TIMEOUT_WEBGL:
return JS::NumberValue(kMaxClientWaitSyncTimeoutNS);
case LOCAL_GL_MAX_ELEMENT_INDEX:
// GL_MAX_ELEMENT_INDEX becomes available in GL 4.3 or via ES3
// compatibility
if (!gl->IsSupported(gl::GLFeature::ES3_compatibility))
return JS::NumberValue(UINT32_MAX);
/*** fall through to fGetInteger64v ***/
[[fallthrough]];
case LOCAL_GL_MAX_COMBINED_FRAGMENT_UNIFORM_COMPONENTS:
case LOCAL_GL_MAX_COMBINED_VERTEX_UNIFORM_COMPONENTS:
case LOCAL_GL_MAX_UNIFORM_BLOCK_SIZE: {
GLint64 val;
gl->fGetInteger64v(pname, &val);
return JS::DoubleValue(static_cast<double>(val));
}
/* GLuint64 */
case LOCAL_GL_MAX_SERVER_WAIT_TIMEOUT: {
GLuint64 val;
gl->fGetInteger64v(pname, (GLint64*) &val);
return JS::DoubleValue(static_cast<double>(val));
}
case LOCAL_GL_COPY_READ_BUFFER_BINDING:
return WebGLObjectAsJSValue(cx, mBoundCopyReadBuffer.get(), rv);
case LOCAL_GL_COPY_WRITE_BUFFER_BINDING:
return WebGLObjectAsJSValue(cx, mBoundCopyWriteBuffer.get(), rv);
case LOCAL_GL_PIXEL_PACK_BUFFER_BINDING:
return WebGLObjectAsJSValue(cx, mBoundPixelPackBuffer.get(), rv);
case LOCAL_GL_PIXEL_UNPACK_BUFFER_BINDING:
return WebGLObjectAsJSValue(cx, mBoundPixelUnpackBuffer.get(), rv);
case LOCAL_GL_TRANSFORM_FEEDBACK_BUFFER_BINDING:
{
const auto& tf = mBoundTransformFeedback;
return WebGLObjectAsJSValue(cx, tf->mGenericBufferBinding.get(), rv);
}
case LOCAL_GL_UNIFORM_BUFFER_BINDING:
return WebGLObjectAsJSValue(cx, mBoundUniformBuffer.get(), rv);
// DRAW_FRAMEBUFFER_BINDING is the same as FRAMEBUFFER_BINDING.
case LOCAL_GL_READ_FRAMEBUFFER_BINDING:
return WebGLObjectAsJSValue(cx, mBoundReadFramebuffer.get(), rv);
case LOCAL_GL_SAMPLER_BINDING:
return WebGLObjectAsJSValue(cx, mBoundSamplers[mActiveTexture].get(), rv);
case LOCAL_GL_TEXTURE_BINDING_2D_ARRAY:
return WebGLObjectAsJSValue(cx, mBound2DArrayTextures[mActiveTexture].get(), rv);
case LOCAL_GL_TEXTURE_BINDING_3D:
return WebGLObjectAsJSValue(cx, mBound3DTextures[mActiveTexture].get(), rv);
case LOCAL_GL_TRANSFORM_FEEDBACK_BINDING:
{
const WebGLTransformFeedback* tf = mBoundTransformFeedback;
if (tf == mDefaultTransformFeedback) {
tf = nullptr;
}
return WebGLObjectAsJSValue(cx, tf, rv);
}
case LOCAL_GL_VERTEX_ARRAY_BINDING: {
WebGLVertexArray* vao =
(mBoundVertexArray != mDefaultVertexArray) ? mBoundVertexArray.get() : nullptr;
return WebGLObjectAsJSValue(cx, vao, rv);
}
case LOCAL_GL_VERSION:
return StringValue(cx, "WebGL 2.0", rv);
case LOCAL_GL_SHADING_LANGUAGE_VERSION:
return StringValue(cx, "WebGL GLSL ES 3.00", rv);
default:
return WebGLContext::GetParameter(cx, pname, rv);
}
}
} // namespace mozilla
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