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/*
* Copyright (C) 2011 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(GRAPHICS_CONTEXT_3D)
#include "Extensions3DOpenGL.h"
#include "GraphicsContext3D.h"
#include <wtf/Vector.h>
#if PLATFORM(IOS)
#include <OpenGLES/ES2/glext.h>
#elif PLATFORM(MAC)
#include <OpenGL/gl.h>
#elif PLATFORM(GTK) || PLATFORM(EFL) || PLATFORM(QT) || PLATFORM(WIN)
#include "OpenGLShims.h"
#endif
#if PLATFORM(IOS)
#include "GraphicsContext3DIOS.h"
#endif
namespace WebCore {
Extensions3DOpenGL::Extensions3DOpenGL(GraphicsContext3D* context)
: Extensions3DOpenGLCommon(context)
{
}
Extensions3DOpenGL::~Extensions3DOpenGL()
{
}
void Extensions3DOpenGL::blitFramebuffer(long srcX0, long srcY0, long srcX1, long srcY1, long dstX0, long dstY0, long dstX1, long dstY1, unsigned long mask, unsigned long filter)
{
#if PLATFORM(IOS)
UNUSED_PARAM(srcX0);
UNUSED_PARAM(srcY0);
UNUSED_PARAM(srcX1);
UNUSED_PARAM(srcY1);
UNUSED_PARAM(dstX0);
UNUSED_PARAM(dstY0);
UNUSED_PARAM(dstX1);
UNUSED_PARAM(dstY1);
UNUSED_PARAM(mask);
UNUSED_PARAM(filter);
::glResolveMultisampleFramebufferAPPLE();
#else
::glBlitFramebufferEXT(srcX0, srcY0, srcX1, srcY1, dstX0, dstY0, dstX1, dstY1, mask, filter);
#endif
}
void Extensions3DOpenGL::renderbufferStorageMultisample(unsigned long target, unsigned long samples, unsigned long internalformat, unsigned long width, unsigned long height)
{
::glRenderbufferStorageMultisampleEXT(target, samples, internalformat, width, height);
}
Platform3DObject Extensions3DOpenGL::createVertexArrayOES()
{
m_context->makeContextCurrent();
GLuint array = 0;
#if (PLATFORM(GTK) || PLATFORM(QT) || PLATFORM(EFL) || PLATFORM(WIN) || PLATFORM(IOS))
if (isVertexArrayObjectSupported())
glGenVertexArrays(1, &array);
#elif defined(GL_APPLE_vertex_array_object) && GL_APPLE_vertex_array_object
glGenVertexArraysAPPLE(1, &array);
#endif
return array;
}
void Extensions3DOpenGL::deleteVertexArrayOES(Platform3DObject array)
{
if (!array)
return;
m_context->makeContextCurrent();
#if (PLATFORM(GTK) || PLATFORM(QT) || PLATFORM(EFL) || PLATFORM(WIN) || PLATFORM(IOS))
if (isVertexArrayObjectSupported())
glDeleteVertexArrays(1, &array);
#elif defined(GL_APPLE_vertex_array_object) && GL_APPLE_vertex_array_object
glDeleteVertexArraysAPPLE(1, &array);
#endif
}
GC3Dboolean Extensions3DOpenGL::isVertexArrayOES(Platform3DObject array)
{
if (!array)
return GL_FALSE;
m_context->makeContextCurrent();
#if (PLATFORM(GTK) || PLATFORM(QT) || PLATFORM(EFL) || PLATFORM(WIN) || PLATFORM(IOS))
if (isVertexArrayObjectSupported())
return glIsVertexArray(array);
#elif defined(GL_APPLE_vertex_array_object) && GL_APPLE_vertex_array_object
return glIsVertexArrayAPPLE(array);
#endif
return GL_FALSE;
}
void Extensions3DOpenGL::bindVertexArrayOES(Platform3DObject array)
{
m_context->makeContextCurrent();
#if (PLATFORM(GTK) || PLATFORM(QT) || PLATFORM(EFL) || PLATFORM(WIN) || PLATFORM(IOS))
if (isVertexArrayObjectSupported())
glBindVertexArray(array);
#elif defined(GL_APPLE_vertex_array_object) && GL_APPLE_vertex_array_object
glBindVertexArrayAPPLE(array);
#else
UNUSED_PARAM(array);
#endif
}
void Extensions3DOpenGL::insertEventMarkerEXT(const String&)
{
// FIXME: implement this function and add GL_EXT_debug_marker in supports().
return;
}
void Extensions3DOpenGL::pushGroupMarkerEXT(const String&)
{
// FIXME: implement this function and add GL_EXT_debug_marker in supports().
return;
}
void Extensions3DOpenGL::popGroupMarkerEXT(void)
{
// FIXME: implement this function and add GL_EXT_debug_marker in supports().
return;
}
bool Extensions3DOpenGL::supportsExtension(const String& name)
{
// GL_ANGLE_framebuffer_blit and GL_ANGLE_framebuffer_multisample are "fake". They are implemented using other
// extensions. In particular GL_EXT_framebuffer_blit and GL_EXT_framebuffer_multisample/GL_APPLE_framebuffer_multisample.
if (name == "GL_ANGLE_framebuffer_blit")
return m_availableExtensions.contains("GL_EXT_framebuffer_blit");
if (name == "GL_ANGLE_framebuffer_multisample")
#if PLATFORM(IOS)
return m_availableExtensions.contains("GL_APPLE_framebuffer_multisample");
#else
return m_availableExtensions.contains("GL_EXT_framebuffer_multisample");
#endif
if (name == "GL_ANGLE_instanced_arrays") {
return (m_availableExtensions.contains("GL_ARB_instanced_arrays") || m_availableExtensions.contains("GL_EXT_instanced_arrays"))
&& (m_availableExtensions.contains("GL_ARB_draw_instanced") || m_availableExtensions.contains("GL_EXT_draw_instanced"));
}
if (name == "GL_EXT_sRGB")
#if PLATFORM(IOS)
return m_availableExtensions.contains("GL_EXT_sRGB");
#else
return m_availableExtensions.contains("GL_EXT_texture_sRGB") && (m_availableExtensions.contains("GL_EXT_framebuffer_sRGB") || m_availableExtensions.contains("GL_ARB_framebuffer_sRGB"));
#endif
if (name == "GL_EXT_frag_depth")
#if PLATFORM(MAC)
return true;
#else
return m_availableExtensions.contains("GL_EXT_frag_depth");
#endif
// Desktop GL always supports GL_OES_rgb8_rgba8.
if (name == "GL_OES_rgb8_rgba8")
return true;
// If GL_ARB_texture_float or GL_OES_texture_float is available then we report
// GL_OES_texture_half_float, GL_OES_texture_float_linear and GL_OES_texture_half_float_linear as available.
if (name == "GL_OES_texture_float" || name == "GL_OES_texture_half_float" || name == "GL_OES_texture_float_linear" || name == "GL_OES_texture_half_float_linear")
return m_availableExtensions.contains("GL_ARB_texture_float") || m_availableExtensions.contains("GL_OES_texture_float");
// GL_OES_vertex_array_object
if (name == "GL_OES_vertex_array_object") {
#if (PLATFORM(GTK) || PLATFORM(QT) || PLATFORM(EFL))
return m_availableExtensions.contains("GL_ARB_vertex_array_object");
#elif PLATFORM(IOS)
return m_availableExtensions.contains("GL_OES_vertex_array_object");
#else
return m_availableExtensions.contains("GL_APPLE_vertex_array_object");
#endif
}
// Desktop GL always supports the standard derivative functions
if (name == "GL_OES_standard_derivatives")
return true;
// Desktop GL always supports UNSIGNED_INT indices
if (name == "GL_OES_element_index_uint")
return true;
if (name == "GL_EXT_shader_texture_lod")
return m_availableExtensions.contains("GL_EXT_shader_texture_lod");
if (name == "GL_EXT_texture_filter_anisotropic")
return m_availableExtensions.contains("GL_EXT_texture_filter_anisotropic");
if (name == "GL_EXT_draw_buffers") {
#if PLATFORM(IOS)
return m_availableExtensions.contains(name);
#elif PLATFORM(MAC) || PLATFORM(GTK)
return m_availableExtensions.contains("GL_ARB_draw_buffers");
#else
// FIXME: implement support for other platforms.
return false;
#endif
}
#if PLATFORM(IOS)
if (name == "GL_EXT_packed_depth_stencil")
return m_availableExtensions.contains("GL_OES_packed_depth_stencil");
#endif
return m_availableExtensions.contains(name);
}
void Extensions3DOpenGL::drawBuffersEXT(GC3Dsizei n, const GC3Denum* bufs)
{
// FIXME: implement support for other platforms.
#if PLATFORM(MAC)
::glDrawBuffersARB(n, bufs);
#elif PLATFORM(GTK)
::glDrawBuffers(n, bufs);
#else
UNUSED_PARAM(n);
UNUSED_PARAM(bufs);
#endif
}
void Extensions3DOpenGL::drawArraysInstanced(GC3Denum mode, GC3Dint first, GC3Dsizei count, GC3Dsizei primcount)
{
m_context->makeContextCurrent();
#if PLATFORM(GTK)
::glDrawArraysInstanced(mode, first, count, primcount);
#elif PLATFORM(COCOA)
::glDrawArraysInstancedARB(mode, first, count, primcount);
#else
UNUSED_PARAM(mode);
UNUSED_PARAM(first);
UNUSED_PARAM(count);
UNUSED_PARAM(primcount);
#endif
}
void Extensions3DOpenGL::drawElementsInstanced(GC3Denum mode, GC3Dsizei count, GC3Denum type, long long offset, GC3Dsizei primcount)
{
m_context->makeContextCurrent();
#if PLATFORM(GTK)
::glDrawElementsInstanced(mode, count, type, reinterpret_cast<GLvoid*>(static_cast<intptr_t>(offset)), primcount);
#elif PLATFORM(COCOA)
::glDrawElementsInstancedARB(mode, count, type, reinterpret_cast<GLvoid*>(static_cast<intptr_t>(offset)), primcount);
#else
UNUSED_PARAM(mode);
UNUSED_PARAM(count);
UNUSED_PARAM(type);
UNUSED_PARAM(offset);
UNUSED_PARAM(primcount);
#endif
}
void Extensions3DOpenGL::vertexAttribDivisor(GC3Duint index, GC3Duint divisor)
{
m_context->makeContextCurrent();
#if PLATFORM(GTK)
::glVertexAttribDivisor(index, divisor);
#elif PLATFORM(COCOA)
::glVertexAttribDivisorARB(index, divisor);
#else
UNUSED_PARAM(index);
UNUSED_PARAM(divisor);
#endif
}
String Extensions3DOpenGL::getExtensions()
{
return String(reinterpret_cast<const char*>(::glGetString(GL_EXTENSIONS)));
}
#if (PLATFORM(GTK) || PLATFORM(QT) || PLATFORM(EFL) || PLATFORM(WIN) || PLATFORM(IOS))
bool Extensions3DOpenGL::isVertexArrayObjectSupported()
{
static const bool supportsVertexArrayObject = supports("GL_OES_vertex_array_object");
return supportsVertexArrayObject;
}
#endif
} // namespace WebCore
#endif // ENABLE(GRAPHICS_CONTEXT_3D)
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