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