diff options
Diffstat (limited to 'dom/canvas/WebGL2ContextState.cpp')
| -rw-r--r-- | dom/canvas/WebGL2ContextState.cpp | 202 |
1 files changed, 202 insertions, 0 deletions
diff --git a/dom/canvas/WebGL2ContextState.cpp b/dom/canvas/WebGL2ContextState.cpp new file mode 100644 index 000000000..be0a7a3cb --- /dev/null +++ b/dom/canvas/WebGL2ContextState.cpp @@ -0,0 +1,202 @@ +/* -*- 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 "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 |