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/* -*- 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 {
Maybe<double> WebGL2Context::GetParameter(GLenum pname) {
const FuncScope funcScope(*this, "getParameter");
// 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 Nothing();
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 Some(bool(b));
}
case LOCAL_GL_TRANSFORM_FEEDBACK_ACTIVE:
return Some(mBoundTransformFeedback->mIsActive);
case LOCAL_GL_TRANSFORM_FEEDBACK_PAUSED:
return Some(mBoundTransformFeedback->mIsPaused);
/* GLenum */
case LOCAL_GL_READ_BUFFER: {
if (!mBoundReadFramebuffer) return Some(mDefaultFB_ReadBuffer);
if (!mBoundReadFramebuffer->ColorReadBuffer()) return Some(LOCAL_GL_NONE);
return Some(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_COMPONENTS:
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: {
GLint val;
gl->fGetIntegerv(pname, &val);
return Some(val);
}
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 Some(4 * val);
}
/* GLint64 */
case LOCAL_GL_MAX_CLIENT_WAIT_TIMEOUT_WEBGL:
return Some(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 Some(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 Some(static_cast<double>(val));
}
/* GLuint64 */
case LOCAL_GL_MAX_SERVER_WAIT_TIMEOUT: {
GLuint64 val;
gl->fGetInteger64v(pname, (GLint64*)&val);
return Some(static_cast<double>(val));
}
default:
return WebGLContext::GetParameter(pname);
}
}
} // namespace mozilla
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