mirror of
https://github.com/mozilla/gecko-dev.git
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118 lines
3.7 KiB
C++
118 lines
3.7 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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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 "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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Maybe<double> WebGL2Context::GetParameter(GLenum pname) {
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const FuncScope funcScope(*this, "getParameter");
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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()) return Nothing();
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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 Some(bool(b));
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}
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case LOCAL_GL_TRANSFORM_FEEDBACK_ACTIVE:
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return Some(mBoundTransformFeedback->mIsActive);
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case LOCAL_GL_TRANSFORM_FEEDBACK_PAUSED:
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return Some(mBoundTransformFeedback->mIsPaused);
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/* GLenum */
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case LOCAL_GL_READ_BUFFER: {
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if (!mBoundReadFramebuffer) return Some(mDefaultFB_ReadBuffer);
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if (!mBoundReadFramebuffer->ColorReadBuffer()) return Some(LOCAL_GL_NONE);
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return Some(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_COMPONENTS:
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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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GLint val;
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gl->fGetIntegerv(pname, &val);
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return Some(val);
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}
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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 Some(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 Some(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 Some(UINT32_MAX);
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/*** fall through to fGetInteger64v ***/
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[[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 Some(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 Some(static_cast<double>(val));
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}
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default:
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return WebGLContext::GetParameter(pname);
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}
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}
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} // namespace mozilla
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