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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/webgl_multi_draw.h"
#include "gpu/command_buffer/client/gles2_interface.h"
#include "third_party/blink/renderer/modules/webgl/webgl_rendering_context_base.h"
namespace blink {
WebGLMultiDraw::WebGLMultiDraw(WebGLRenderingContextBase* context)
: WebGLExtension(context) {
context->ExtensionsUtil()->EnsureExtensionEnabled("GL_WEBGL_multi_draw");
context->ExtensionsUtil()->EnsureExtensionEnabled("GL_ANGLE_multi_draw");
// Spec requires ANGLE_instanced_arrays to be implicitly turned on
// here in WebGL 1.0 contexts.
if (!context->IsWebGL2()) {
context->EnableExtensionIfSupported("ANGLE_instanced_arrays");
}
}
WebGLExtensionName WebGLMultiDraw::GetName() const {
return kWebGLMultiDrawName;
}
bool WebGLMultiDraw::Supported(WebGLRenderingContextBase* context) {
return context->ExtensionsUtil()->SupportsExtension("GL_WEBGL_multi_draw") ||
(context->ExtensionsUtil()->SupportsExtension("GL_ANGLE_multi_draw") &&
context->ExtensionsUtil()->SupportsExtension(
"GL_ANGLE_instanced_arrays"));
}
const char* WebGLMultiDraw::ExtensionName() {
return "WEBGL_multi_draw";
}
void WebGLMultiDraw::multiDrawArraysWEBGL(GLenum mode,
base::span<const int32_t> firsts,
GLuint firstsOffset,
base::span<const int32_t> counts,
GLuint countsOffset,
GLsizei drawcount) {
WebGLExtensionScopedContext scoped(this);
if (scoped.IsLost() ||
!ValidateDrawcount(&scoped, "multiDrawArraysWEBGL", drawcount) ||
!ValidateArray(&scoped, "multiDrawArraysWEBGL",
"firstsOffset out of bounds", firsts.size(), firstsOffset,
drawcount) ||
!ValidateArray(&scoped, "multiDrawArraysWEBGL",
"countsOffset out of bounds", counts.size(), countsOffset,
drawcount)) {
return;
}
scoped.Context()->DrawWrapper(
"multiDrawArraysWEBGL", CanvasPerformanceMonitor::DrawType::kDrawArrays,
[&]() {
scoped.Context()->ContextGL()->MultiDrawArraysWEBGL(
mode, &firsts[firstsOffset], &counts[countsOffset], drawcount);
});
}
void WebGLMultiDraw::multiDrawElementsWEBGL(GLenum mode,
base::span<const int32_t> counts,
GLuint countsOffset,
GLenum type,
base::span<const int32_t> offsets,
GLuint offsetsOffset,
GLsizei drawcount) {
WebGLExtensionScopedContext scoped(this);
if (scoped.IsLost() ||
!ValidateDrawcount(&scoped, "multiDrawElementsWEBGL", drawcount) ||
!ValidateArray(&scoped, "multiDrawElementsWEBGL",
"countsOffset out of bounds", counts.size(), countsOffset,
drawcount) ||
!ValidateArray(&scoped, "multiDrawElementsWEBGL",
"offsetsOffset out of bounds", offsets.size(),
offsetsOffset, drawcount)) {
return;
}
scoped.Context()->DrawWrapper(
"multiDrawElementsWEBGL",
CanvasPerformanceMonitor::DrawType::kDrawElements, [&]() {
scoped.Context()->ContextGL()->MultiDrawElementsWEBGL(
mode, &counts[countsOffset], type, &offsets[offsetsOffset],
drawcount);
});
}
void WebGLMultiDraw::multiDrawArraysInstancedWEBGL(
GLenum mode,
base::span<const int32_t> firsts,
GLuint firstsOffset,
base::span<const int32_t> counts,
GLuint countsOffset,
base::span<const int32_t> instanceCounts,
GLuint instanceCountsOffset,
GLsizei drawcount) {
WebGLExtensionScopedContext scoped(this);
if (scoped.IsLost() ||
!ValidateDrawcount(&scoped, "multiDrawArraysInstancedWEBGL", drawcount) ||
!ValidateArray(&scoped, "multiDrawArraysInstancedWEBGL",
"firstsOffset out of bounds", firsts.size(), firstsOffset,
drawcount) ||
!ValidateArray(&scoped, "multiDrawArraysInstancedWEBGL",
"countsOffset out of bounds", counts.size(), countsOffset,
drawcount) ||
!ValidateArray(&scoped, "multiDrawArraysInstancedWEBGL",
"instanceCountsOffset out of bounds",
instanceCounts.size(), instanceCountsOffset, drawcount)) {
return;
}
scoped.Context()->DrawWrapper(
"multiDrawArraysInstancedWEBGL",
CanvasPerformanceMonitor::DrawType::kDrawArrays, [&]() {
scoped.Context()->ContextGL()->MultiDrawArraysInstancedWEBGL(
mode, &firsts[firstsOffset], &counts[countsOffset],
&instanceCounts[instanceCountsOffset], drawcount);
});
}
void WebGLMultiDraw::multiDrawElementsInstancedWEBGL(
GLenum mode,
base::span<const int32_t> counts,
GLuint countsOffset,
GLenum type,
base::span<const int32_t> offsets,
GLuint offsetsOffset,
base::span<const int32_t> instanceCounts,
GLuint instanceCountsOffset,
GLsizei drawcount) {
WebGLExtensionScopedContext scoped(this);
if (scoped.IsLost() ||
!ValidateDrawcount(&scoped, "multiDrawElementsInstancedWEBGL",
drawcount) ||
!ValidateArray(&scoped, "multiDrawElementsInstancedWEBGL",
"countsOffset out of bounds", counts.size(), countsOffset,
drawcount) ||
!ValidateArray(&scoped, "multiDrawElementsInstancedWEBGL",
"offsetsOffset out of bounds", offsets.size(),
offsetsOffset, drawcount) ||
!ValidateArray(&scoped, "multiDrawElementsInstancedWEBGL",
"instanceCountsOffset out of bounds",
instanceCounts.size(), instanceCountsOffset, drawcount)) {
return;
}
scoped.Context()->DrawWrapper(
"multiDrawElementsInstancedWEBGL",
CanvasPerformanceMonitor::DrawType::kDrawElements, [&]() {
scoped.Context()->ContextGL()->MultiDrawElementsInstancedWEBGL(
mode, &counts[countsOffset], type, &offsets[offsetsOffset],
&instanceCounts[instanceCountsOffset], drawcount);
});
}
} // namespace blink
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