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// Copyright 2018 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "third_party/blink/renderer/modules/webgl/ovr_multiview_2.h"
#include "third_party/blink/renderer/modules/webgl/webgl2_rendering_context_base.h"
#include "third_party/blink/renderer/modules/webgl/webgl_framebuffer.h"
#include "third_party/blink/renderer/modules/webgl/webgl_rendering_context_base.h"
namespace blink {
OVRMultiview2::OVRMultiview2(WebGLRenderingContextBase* context)
: WebGLExtension(context) {
context->ExtensionsUtil()->EnsureExtensionEnabled("GL_OVR_multiview2");
context->ContextGL()->GetIntegerv(GL_MAX_VIEWS_OVR, &max_views_ovr_);
}
WebGLExtensionName OVRMultiview2::GetName() const {
return kOVRMultiview2Name;
}
void OVRMultiview2::framebufferTextureMultiviewOVR(GLenum target,
GLenum attachment,
WebGLTexture* texture,
GLint level,
GLint base_view_index,
GLsizei num_views) {
WebGLExtensionScopedContext scoped(this);
if (scoped.IsLost())
return;
if (!scoped.Context()->ValidateNullableWebGLObject(
"framebufferTextureMultiviewOVR", texture))
return;
GLenum textarget = texture ? texture->GetTarget() : 0;
if (texture) {
if (textarget != GL_TEXTURE_2D_ARRAY) {
scoped.Context()->SynthesizeGLError(GL_INVALID_OPERATION,
"framebufferTextureMultiviewOVR",
"invalid texture type");
return;
}
if (num_views < 1) {
scoped.Context()->SynthesizeGLError(GL_INVALID_VALUE,
"framebufferTextureMultiviewOVR",
"numViews is less than one");
return;
}
if (num_views > max_views_ovr_) {
scoped.Context()->SynthesizeGLError(
GL_INVALID_VALUE, "framebufferTextureMultiviewOVR",
"numViews is more than the value of MAX_VIEWS_OVR");
return;
}
if (!static_cast<WebGL2RenderingContextBase*>(scoped.Context())
->ValidateTexFuncLayer("framebufferTextureMultiviewOVR", textarget,
base_view_index))
return;
if (!static_cast<WebGL2RenderingContextBase*>(scoped.Context())
->ValidateTexFuncLayer("framebufferTextureMultiviewOVR", textarget,
base_view_index + num_views - 1))
return;
if (!scoped.Context()->ValidateTexFuncLevel(
"framebufferTextureMultiviewOVR", textarget, level))
return;
}
WebGLFramebuffer* framebuffer_binding =
scoped.Context()->GetFramebufferBinding(target);
if (!framebuffer_binding || !framebuffer_binding->Object()) {
scoped.Context()->SynthesizeGLError(GL_INVALID_OPERATION,
"framebufferTextureMultiviewOVR",
"no framebuffer bound");
return;
}
framebuffer_binding->SetAttachmentForBoundFramebuffer(
target, attachment, textarget, texture, level, base_view_index,
num_views);
scoped.Context()->ApplyDepthAndStencilTest();
}
bool OVRMultiview2::Supported(WebGLRenderingContextBase* context) {
return context->ExtensionsUtil()->SupportsExtension("GL_OVR_multiview2");
}
const char* OVRMultiview2::ExtensionName() {
return "OVR_multiview2";
}
} // namespace blink
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