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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 "WebGLContextUtils.h"
#include "WebGLFormats.h"
namespace mozilla {
Maybe<std::vector<int32_t>> WebGL2Context::GetInternalformatParameter(
GLenum target, GLenum internalformat, GLenum pname) const {
const FuncScope funcScope(*this, "getInternalfomratParameter");
if (IsContextLost()) return Nothing();
if (target != LOCAL_GL_RENDERBUFFER) {
ErrorInvalidEnum("`target` must be RENDERBUFFER.");
return Nothing();
}
// GLES 3.0.4 $4.4.4 p212:
// "An internal format is color-renderable if it is one of the formats from
// table 3.13
// noted as color-renderable or if it is unsized format RGBA or RGB."
GLenum sizedFormat;
switch (internalformat) {
case LOCAL_GL_RGB:
sizedFormat = LOCAL_GL_RGB8;
break;
case LOCAL_GL_RGBA:
sizedFormat = LOCAL_GL_RGBA8;
break;
default:
sizedFormat = internalformat;
break;
}
// In RenderbufferStorage, we allow DEPTH_STENCIL. Therefore, it is accepted
// for internalformat as well. Please ignore the conformance test fail for
// DEPTH_STENCIL.
const auto usage = mFormatUsage->GetRBUsage(sizedFormat);
if (!usage) {
ErrorInvalidEnum(
"`internalformat` must be color-, depth-, or stencil-renderable, was: "
"0x%04x.",
internalformat);
return Nothing();
}
if (pname != LOCAL_GL_SAMPLES) {
ErrorInvalidEnum("`pname` must be SAMPLES.");
return Nothing();
}
std::vector<int32_t> ret;
GLint sampleCount = 0;
gl->fGetInternalformativ(LOCAL_GL_RENDERBUFFER, internalformat,
LOCAL_GL_NUM_SAMPLE_COUNTS, 1, &sampleCount);
if (sampleCount) {
ret.resize(sampleCount);
gl->fGetInternalformativ(LOCAL_GL_RENDERBUFFER, internalformat,
LOCAL_GL_SAMPLES, ret.size(), ret.data());
}
return Some(ret);
}
} // namespace mozilla
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