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// Copyright 2018 The Chromium Authors. All rights reserved.
// 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/webgl_multi_draw_instanced.h"
#include "gpu/command_buffer/client/gles2_interface.h"
namespace blink {
WebGLMultiDrawInstanced::WebGLMultiDrawInstanced(
WebGLRenderingContextBase* context)
: WebGLExtension(context) {
context->ExtensionsUtil()->EnsureExtensionEnabled(
"GL_WEBGL_multi_draw_instanced");
context->ExtensionsUtil()->EnsureExtensionEnabled("GL_ANGLE_multi_draw");
}
WebGLMultiDrawInstanced* WebGLMultiDrawInstanced::Create(
WebGLRenderingContextBase* context) {
return MakeGarbageCollected<WebGLMultiDrawInstanced>(context);
}
WebGLExtensionName WebGLMultiDrawInstanced::GetName() const {
return kWebGLMultiDrawInstancedName;
}
bool WebGLMultiDrawInstanced::Supported(WebGLRenderingContextBase* context) {
return context->ExtensionsUtil()->SupportsExtension(
"GL_WEBGL_multi_draw_instanced") ||
(context->ExtensionsUtil()->SupportsExtension("GL_ANGLE_multi_draw") &&
context->ExtensionsUtil()->SupportsExtension(
"GL_ANGLE_instanced_arrays"));
}
const char* WebGLMultiDrawInstanced::ExtensionName() {
return "WEBGL_multi_draw_instanced";
}
void WebGLMultiDrawInstanced::multiDrawArraysInstancedImpl(
GLenum mode,
const base::span<const int32_t>& firsts,
GLuint firstsOffset,
const base::span<const int32_t>& counts,
GLuint countsOffset,
const base::span<const int32_t>& instanceCounts,
GLuint instanceCountsOffset,
GLsizei drawcount) {
WebGLExtensionScopedContext scoped(this);
if (scoped.IsLost() ||
!ValidateDrawcount(&scoped, "glMultiDrawArraysWEBGL", drawcount) ||
!ValidateArray(&scoped, "glMultiDrawArraysWEBGL",
"firstsOffset out of bounds", firsts.size(), firstsOffset,
drawcount) ||
!ValidateArray(&scoped, "glMultiDrawArraysWEBGL",
"countsOffset out of bounds", counts.size(), countsOffset,
drawcount) ||
!ValidateArray(&scoped, "glMultiDrawElementsWEBGL",
"instanceCountsOffset out of bounds",
instanceCounts.size(), instanceCountsOffset, drawcount)) {
return;
}
scoped.Context()->ContextGL()->MultiDrawArraysInstancedWEBGL(
mode, &firsts[firstsOffset], &counts[countsOffset],
&instanceCounts[instanceCountsOffset], drawcount);
}
void WebGLMultiDrawInstanced::multiDrawElementsInstancedImpl(
GLenum mode,
const base::span<const int32_t>& counts,
GLuint countsOffset,
GLenum type,
const base::span<const int32_t>& offsets,
GLuint offsetsOffset,
const base::span<const int32_t>& instanceCounts,
GLuint instanceCountsOffset,
GLsizei drawcount) {
WebGLExtensionScopedContext scoped(this);
if (scoped.IsLost() ||
!ValidateDrawcount(&scoped, "glMultiDrawElementsWEBGL", drawcount) ||
!ValidateArray(&scoped, "glMultiDrawElementsWEBGL",
"countsOffset out of bounds", counts.size(), countsOffset,
drawcount) ||
!ValidateArray(&scoped, "glMultiDrawElementsWEBGL",
"offsetsOffset out of bounds", offsets.size(),
offsetsOffset, drawcount) ||
!ValidateArray(&scoped, "glMultiDrawElementsWEBGL",
"instanceCountsOffset out of bounds",
instanceCounts.size(), instanceCountsOffset, drawcount)) {
return;
}
scoped.Context()->ContextGL()->MultiDrawElementsInstancedWEBGL(
mode, &counts[countsOffset], type, &offsets[offsetsOffset],
&instanceCounts[instanceCountsOffset], drawcount);
}
} // namespace blink
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