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/*
* Copyright (C) 2021 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#if ENABLE(WEBGL)
#include "WebGLMultiDraw.h"
#include <wtf/IsoMallocInlines.h>
namespace WebCore {
WTF_MAKE_ISO_ALLOCATED_IMPL(WebGLMultiDraw);
static GCGLSpan<const int> makeSpanWithOffset(WebGLMultiDraw::Int32List& list, GCGLuint offset)
{
return makeGCGLSpan(list.data() + offset, list.length() - offset);
}
WebGLMultiDraw::WebGLMultiDraw(WebGLRenderingContextBase& context)
: WebGLExtension(context)
{
context.graphicsContextGL()->ensureExtensionEnabled("GL_ANGLE_multi_draw"_s);
context.graphicsContextGL()->ensureExtensionEnabled("GL_ANGLE_instanced_arrays"_s);
}
WebGLMultiDraw::~WebGLMultiDraw() = default;
WebGLExtension::ExtensionName WebGLMultiDraw::getName() const
{
return WebGLMultiDrawName;
}
bool WebGLMultiDraw::supported(GraphicsContextGL& context)
{
return context.supportsExtension("GL_ANGLE_multi_draw"_s)
&& context.supportsExtension("GL_ANGLE_instanced_arrays"_s);
}
void WebGLMultiDraw::multiDrawArraysWEBGL(GCGLenum mode, Int32List firstsList, GCGLuint firstsOffset, Int32List countsList, GCGLuint countsOffset, GCGLsizei drawcount)
{
if (!m_context || m_context->isContextLost())
return;
if (!validateDrawcount("multiDrawArraysWEBGL", drawcount)
|| !validateOffset("multiDrawArraysWEBGL", "firstsOffset out of bounds", firstsList.length(), firstsOffset, drawcount)
|| !validateOffset("multiDrawArraysWEBGL", "countsOffset out of bounds", countsList.length(), countsOffset, drawcount)) {
return;
}
m_context->graphicsContextGL()->multiDrawArraysANGLE(mode, makeSpanWithOffset(firstsList, firstsOffset), makeSpanWithOffset(countsList, countsOffset), drawcount);
}
void WebGLMultiDraw::multiDrawArraysInstancedWEBGL(GCGLenum mode, Int32List firstsList, GCGLuint firstsOffset, Int32List countsList, GCGLuint countsOffset, Int32List instanceCountsList, GCGLuint instanceCountsOffset, GCGLsizei drawcount)
{
if (!m_context || m_context->isContextLost())
return;
if (!validateDrawcount("multiDrawArraysInstancedWEBGL", drawcount)
|| !validateOffset("multiDrawArraysInstancedWEBGL", "firstsOffset out of bounds", firstsList.length(), firstsOffset, drawcount)
|| !validateOffset("multiDrawArraysInstancedWEBGL", "countsOffset out of bounds", countsList.length(), countsOffset, drawcount)
|| !validateOffset("multiDrawArraysInstancedWEBGL", "instanceCountsOffset out of bounds", instanceCountsList.length(), instanceCountsOffset, drawcount)) {
return;
}
m_context->graphicsContextGL()->multiDrawArraysInstancedANGLE(mode, makeSpanWithOffset(firstsList, firstsOffset), makeSpanWithOffset(countsList, countsOffset), makeSpanWithOffset(instanceCountsList, instanceCountsOffset), drawcount);
}
void WebGLMultiDraw::multiDrawElementsWEBGL(GCGLenum mode, Int32List countsList, GCGLuint countsOffset, GCGLenum type, Int32List offsetsList, GCGLuint offsetsOffset, GCGLsizei drawcount)
{
if (!m_context || m_context->isContextLost())
return;
if (!validateDrawcount("multiDrawElementsWEBGL", drawcount)
|| !validateOffset("multiDrawElementsWEBGL", "countsOffset out of bounds", countsList.length(), countsOffset, drawcount)
|| !validateOffset("multiDrawElementsWEBGL", "offsetsOffset out of bounds", offsetsList.length(), offsetsOffset, drawcount)) {
return;
}
m_context->graphicsContextGL()->multiDrawElementsANGLE(mode, makeSpanWithOffset(countsList, countsOffset), type, makeSpanWithOffset(offsetsList, offsetsOffset), drawcount);
}
void WebGLMultiDraw::multiDrawElementsInstancedWEBGL(GCGLenum mode, Int32List countsList, GCGLuint countsOffset, GCGLenum type, Int32List offsetsList, GCGLuint offsetsOffset, Int32List instanceCountsList, GCGLuint instanceCountsOffset, GCGLsizei drawcount)
{
if (!m_context || m_context->isContextLost())
return;
if (!validateDrawcount("multiDrawElementsWEBGL", drawcount)
|| !validateOffset("multiDrawElementsWEBGL", "countsOffset out of bounds", countsList.length(), countsOffset, drawcount)
|| !validateOffset("multiDrawElementsWEBGL", "offsetsOffset out of bounds", offsetsList.length(), offsetsOffset, drawcount)
|| !validateOffset("multiDrawElementsWEBGL", "countsOffset out of bounds", instanceCountsList.length(), instanceCountsOffset, drawcount)) {
return;
}
m_context->graphicsContextGL()->multiDrawElementsInstancedANGLE(mode, makeSpanWithOffset(countsList, countsOffset), type, makeSpanWithOffset(offsetsList, offsetsOffset), makeSpanWithOffset(instanceCountsList, instanceCountsOffset), drawcount);
}
bool WebGLMultiDraw::validateDrawcount(const char* functionName, GCGLsizei drawcount)
{
if (drawcount < 0) {
m_context->synthesizeGLError(GraphicsContextGL::INVALID_VALUE, functionName, "negative drawcount");
return false;
}
return true;
}
bool WebGLMultiDraw::validateOffset(const char* functionName, const char* outOfBoundsDescription, GCGLsizei size, GCGLuint offset, GCGLsizei drawcount)
{
if (drawcount > size) {
m_context->synthesizeGLError(GraphicsContextGL::INVALID_OPERATION, functionName, "drawcount out of bounds");
return false;
}
if (offset >= static_cast<GCGLuint>(size - drawcount)) {
m_context->synthesizeGLError(GraphicsContextGL::INVALID_OPERATION, functionName, outOfBoundsDescription);
return false;
}
return true;
}
} // namespace WebCore
#endif // ENABLE(WEBGL)
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