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