/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ /* vim: set ts=8 sts=2 et sw=2 tw=80: */ /* 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 ***/ MOZ_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