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/*
Copyright (C) 2012 Samsung Electronics
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#include "config.h"
#include "GraphicsContext3D.h"
#if USE(3D_GRAPHICS) || USE(ACCELERATED_COMPOSITING)
#include "GraphicsContext3DPrivate.h"
#include "ImageData.h"
#include "NotImplemented.h"
#include "OpenGLShims.h"
#include "PlatformContextCairo.h"
#include <GL/glx.h>
#if USE(OPENGL_ES_2)
#include "Extensions3DOpenGLES.h"
#else
#include "Extensions3DOpenGL.h"
#endif
namespace WebCore {
PassRefPtr<GraphicsContext3D> GraphicsContext3D::create(GraphicsContext3D::Attributes attrs, HostWindow* hostWindow, RenderStyle renderStyle)
{
RefPtr<GraphicsContext3D> context = adoptRef(new GraphicsContext3D(attrs, hostWindow, renderStyle));
return context->m_private ? context.release() : 0;
}
GraphicsContext3D::GraphicsContext3D(GraphicsContext3D::Attributes attrs, HostWindow* hostWindow, GraphicsContext3D::RenderStyle renderStyle)
: m_currentWidth(0)
, m_currentHeight(0)
, m_compiler(isGLES2Compliant() ? SH_ESSL_OUTPUT : SH_GLSL_OUTPUT)
, m_attrs(attrs)
, m_texture(0)
, m_compositorTexture(0)
, m_fbo(0)
#if USE(OPENGL_ES_2)
, m_depthBuffer(0)
, m_stencilBuffer(0)
#endif
, m_depthStencilBuffer(0)
, m_layerComposited(false)
, m_internalColorFormat(0)
, m_boundFBO(0)
, m_activeTexture(GL_TEXTURE0)
, m_boundTexture0(0)
, m_multisampleFBO(0)
, m_multisampleDepthStencilBuffer(0)
, m_multisampleColorBuffer(0)
, m_private(adoptPtr(new GraphicsContext3DPrivate(this, hostWindow, renderStyle)))
{
validateAttributes();
if (!m_private)
return;
static bool initializedShims = false;
static bool success = true;
if (!initializedShims) {
success = initializeOpenGLShims();
initializedShims = true;
}
if (!success) {
m_private = nullptr;
return;
}
if (renderStyle == RenderToCurrentGLContext) {
// Evas doesn't allow including gl headers and Evas_GL headers at the same time,
// so we need to query the current gl context/surface here instead of in GraphicsContext3DPrivate.
void* currentContext = (void*)glXGetCurrentContext();
void* currentSurface = (void*)glXGetCurrentDrawable();
m_private->setCurrentGLContext(currentContext, currentSurface);
}
if (renderStyle == RenderOffscreen) {
// Create buffers for the canvas FBO.
glGenFramebuffers(/* count */ 1, &m_fbo);
// Create a texture to render into.
glGenTextures(1, &m_texture);
glBindTexture(GraphicsContext3D::TEXTURE_2D, m_texture);
glTexParameterf(GraphicsContext3D::TEXTURE_2D, GraphicsContext3D::TEXTURE_MAG_FILTER, GraphicsContext3D::LINEAR);
glTexParameterf(GraphicsContext3D::TEXTURE_2D, GraphicsContext3D::TEXTURE_MIN_FILTER, GraphicsContext3D::LINEAR);
glTexParameteri(GraphicsContext3D::TEXTURE_2D, GraphicsContext3D::TEXTURE_WRAP_S, GraphicsContext3D::CLAMP_TO_EDGE);
glTexParameteri(GraphicsContext3D::TEXTURE_2D, GraphicsContext3D::TEXTURE_WRAP_T, GraphicsContext3D::CLAMP_TO_EDGE);
glBindTexture(GraphicsContext3D::TEXTURE_2D, 0);
// Create a multisample FBO.
if (m_attrs.antialias) {
glGenFramebuffers(1, &m_multisampleFBO);
glBindFramebuffer(GraphicsContext3D::FRAMEBUFFER, m_multisampleFBO);
m_boundFBO = m_multisampleFBO;
glGenRenderbuffers(1, &m_multisampleColorBuffer);
if (m_attrs.stencil || m_attrs.depth)
glGenRenderbuffers(1, &m_multisampleDepthStencilBuffer);
} else {
// Bind canvas FBO.
glBindFramebuffer(GraphicsContext3D::FRAMEBUFFER, m_fbo);
m_boundFBO = m_fbo;
#if USE(OPENGL_ES_2)
if (m_attrs.depth)
glGenRenderbuffers(1, &m_depthBuffer);
if (m_context->m_attrs.stencil)
glGenRenderbuffers(1, &m_stencilBuffer);
#endif
if (m_attrs.stencil || m_attrs.depth)
glGenRenderbuffers(1, &m_depthStencilBuffer);
}
}
// ANGLE initialization.
ShBuiltInResources ANGLEResources;
ShInitBuiltInResources(&ANGLEResources);
getIntegerv(GraphicsContext3D::MAX_VERTEX_ATTRIBS, &ANGLEResources.MaxVertexAttribs);
getIntegerv(GraphicsContext3D::MAX_VERTEX_UNIFORM_VECTORS, &ANGLEResources.MaxVertexUniformVectors);
getIntegerv(GraphicsContext3D::MAX_VARYING_VECTORS, &ANGLEResources.MaxVaryingVectors);
getIntegerv(GraphicsContext3D::MAX_VERTEX_TEXTURE_IMAGE_UNITS, &ANGLEResources.MaxVertexTextureImageUnits);
getIntegerv(GraphicsContext3D::MAX_COMBINED_TEXTURE_IMAGE_UNITS, &ANGLEResources.MaxCombinedTextureImageUnits);
getIntegerv(GraphicsContext3D::MAX_TEXTURE_IMAGE_UNITS, &ANGLEResources.MaxTextureImageUnits);
getIntegerv(GraphicsContext3D::MAX_FRAGMENT_UNIFORM_VECTORS, &ANGLEResources.MaxFragmentUniformVectors);
// Always set to 1 for OpenGL ES.
ANGLEResources.MaxDrawBuffers = 1;
m_compiler.setResources(ANGLEResources);
#if !USE(OPENGL_ES_2)
glEnable(GL_POINT_SPRITE);
glEnable(GL_VERTEX_PROGRAM_POINT_SIZE);
#endif
}
GraphicsContext3D::~GraphicsContext3D()
{
}
PlatformGraphicsContext3D GraphicsContext3D::platformGraphicsContext3D()
{
return m_private->platformGraphicsContext3D();
}
#if USE(ACCELERATED_COMPOSITING)
PlatformLayer* GraphicsContext3D::platformLayer() const
{
#if USE(TEXTURE_MAPPER_GL)
return m_private.get();
#else
notImplemented();
return 0;
#endif
}
#endif
bool GraphicsContext3D::makeContextCurrent()
{
if (!m_private)
return false;
if (m_renderStyle == RenderToCurrentGLContext)
return true;
return m_private->makeContextCurrent();
}
bool GraphicsContext3D::isGLES2Compliant() const
{
#if USE(OPENGL_ES_2)
return true;
#else
return false;
#endif
}
void GraphicsContext3D::setContextLostCallback(PassOwnPtr<ContextLostCallback>)
{
notImplemented();
}
void GraphicsContext3D::setErrorMessageCallback(PassOwnPtr<ErrorMessageCallback>)
{
notImplemented();
}
void GraphicsContext3D::paintToCanvas(const unsigned char* imagePixels, int imageWidth, int imageHeight, int canvasWidth, int canvasHeight, PlatformContextCairo* context)
{
if (!imagePixels || imageWidth <= 0 || imageHeight <= 0 || canvasWidth <= 0 || canvasHeight <= 0 || !context)
return;
cairo_t* cr = context->cr();
context->save();
RefPtr<cairo_surface_t> imageSurface = adoptRef(cairo_image_surface_create_for_data(
const_cast<unsigned char*>(imagePixels), CAIRO_FORMAT_ARGB32, imageWidth, imageHeight, imageWidth * 4));
// OpenGL keeps the pixels stored bottom up, so we need to flip the image here.
cairo_translate(cr, 0, imageHeight);
cairo_scale(cr, 1, -1);
cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
cairo_set_source_surface(cr, imageSurface.get(), 0, 0);
cairo_rectangle(cr, 0, 0, canvasWidth, -canvasHeight);
cairo_fill(cr);
context->restore();
}
#if USE(GRAPHICS_SURFACE)
void GraphicsContext3D::createGraphicsSurfaces(const IntSize& size)
{
notImplemented();
}
#endif
bool GraphicsContext3D::getImageData(Image* image, GC3Denum format, GC3Denum type, bool premultiplyAlpha,
bool ignoreGammaAndColorProfile, Vector<uint8_t>& outputVector)
{
notImplemented();
return false;
}
} // namespace WebCore
#endif // USE(3D_GRAPHICS)
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