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/*
Copyright (C) 2016 Igalia S.L.
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 "VideoTextureCopierGStreamer.h"
#if USE(GSTREAMER_GL)
#include "GLContext.h"
#include "ImageOrientation.h"
#include "TextureMapperShaderProgram.h"
namespace WebCore {
VideoTextureCopierGStreamer::VideoTextureCopierGStreamer()
{
GLContext* previousContext = GLContext::current();
ASSERT(previousContext);
PlatformDisplay::sharedDisplayForCompositing().sharingGLContext()->makeContextCurrent();
m_context3D = GraphicsContext3D::createForCurrentGLContext();
m_shaderProgram = TextureMapperShaderProgram::create(*m_context3D, TextureMapperShaderProgram::Texture);
m_framebuffer = m_context3D->createFramebuffer();
static const GLfloat vertices[] = { 0, 0, 1, 0, 1, 1, 0, 1 };
m_vbo = m_context3D->createBuffer();
m_context3D->bindBuffer(GraphicsContext3D::ARRAY_BUFFER, m_vbo);
m_context3D->bufferData(GraphicsContext3D::ARRAY_BUFFER, sizeof(GC3Dfloat) * 8, vertices, GraphicsContext3D::STATIC_DRAW);
updateTextureSpaceMatrix();
previousContext->makeContextCurrent();
}
VideoTextureCopierGStreamer::~VideoTextureCopierGStreamer()
{
GLContext* previousContext = GLContext::current();
ASSERT(previousContext);
PlatformDisplay::sharedDisplayForCompositing().sharingGLContext()->makeContextCurrent();
m_context3D->deleteFramebuffer(m_framebuffer);
m_context3D->deleteBuffer(m_vbo);
m_shaderProgram = nullptr;
m_context3D = nullptr;
previousContext->makeContextCurrent();
}
void VideoTextureCopierGStreamer::updateTextureSpaceMatrix()
{
m_textureSpaceMatrix.makeIdentity();
switch (m_orientation) {
case OriginRightTop:
m_textureSpaceMatrix.rotate(-90);
m_textureSpaceMatrix.translate(-1, 0);
break;
case OriginBottomRight:
m_textureSpaceMatrix.rotate(180);
m_textureSpaceMatrix.translate(-1, -1);
break;
case OriginLeftBottom:
m_textureSpaceMatrix.rotate(-270);
m_textureSpaceMatrix.translate(0, -1);
break;
default:
ASSERT_NOT_REACHED();
}
if (!m_flipY) {
m_textureSpaceMatrix.flipY();
m_textureSpaceMatrix.translate(0, -1);
}
}
void VideoTextureCopierGStreamer::updateTransformationMatrix()
{
FloatRect targetRect = FloatRect(FloatPoint(), m_size);
TransformationMatrix identityMatrix;
m_modelViewMatrix = TransformationMatrix(identityMatrix).multiply(TransformationMatrix::rectToRect(FloatRect(0, 0, 1, 1), targetRect));
// Taken from TextureMapperGL.
const float nearValue = 9999999;
const float farValue = -99999;
m_projectionMatrix = TransformationMatrix(2.0 / float(m_size.width()), 0, 0, 0,
0, (-2.0) / float(m_size.height()), 0, 0,
0, 0, -2.f / (farValue - nearValue), 0,
-1, 1, -(farValue + nearValue) / (farValue - nearValue), 1);
}
bool VideoTextureCopierGStreamer::copyVideoTextureToPlatformTexture(Platform3DObject inputTexture, IntSize& frameSize, Platform3DObject outputTexture, GC3Denum outputTarget, GC3Dint level, GC3Denum internalFormat, GC3Denum format, GC3Denum type, bool flipY, ImageOrientation& sourceOrientation)
{
if (!m_shaderProgram || !m_framebuffer || !m_vbo || frameSize.isEmpty())
return false;
if (m_size != frameSize) {
m_size = frameSize;
updateTransformationMatrix();
}
if (m_flipY != flipY || m_orientation != sourceOrientation) {
m_flipY = flipY;
m_orientation = sourceOrientation;
updateTextureSpaceMatrix();
}
// Save previous context and activate the sharing one.
GLContext* previousContext = GLContext::current();
ASSERT(previousContext);
PlatformDisplay::sharedDisplayForCompositing().sharingGLContext()->makeContextCurrent();
// Save previous bound framebuffer, texture and viewport.
GC3Dint boundFramebuffer = 0;
GC3Dint boundTexture = 0;
GC3Dint previousViewport[4] = { 0, 0, 0, 0};
m_context3D->getIntegerv(GraphicsContext3D::FRAMEBUFFER_BINDING, &boundFramebuffer);
m_context3D->getIntegerv(GraphicsContext3D::TEXTURE_BINDING_2D, &boundTexture);
m_context3D->getIntegerv(GraphicsContext3D::VIEWPORT, previousViewport);
// Set proper parameters to the output texture and allocate uninitialized memory for it.
m_context3D->bindTexture(outputTarget, outputTexture);
m_context3D->texParameteri(GraphicsContext3D::TEXTURE_2D, GraphicsContext3D::TEXTURE_MIN_FILTER, GraphicsContext3D::LINEAR);
m_context3D->texParameterf(GraphicsContext3D::TEXTURE_2D, GraphicsContext3D::TEXTURE_WRAP_S, GraphicsContext3D::CLAMP_TO_EDGE);
m_context3D->texParameterf(GraphicsContext3D::TEXTURE_2D, GraphicsContext3D::TEXTURE_WRAP_T, GraphicsContext3D::CLAMP_TO_EDGE);
m_context3D->texImage2DDirect(outputTarget, level, internalFormat, m_size.width(), m_size.height(), 0, format, type, nullptr);
// Bind framebuffer to paint and attach the destination texture to it.
m_context3D->bindFramebuffer(GraphicsContext3D::FRAMEBUFFER, m_framebuffer);
m_context3D->framebufferTexture2D(GraphicsContext3D::FRAMEBUFFER, GraphicsContext3D::COLOR_ATTACHMENT0, GL_TEXTURE_2D, outputTexture, 0);
// Set proper wrap parameter to the source texture.
m_context3D->bindTexture(GL_TEXTURE_2D, inputTexture);
m_context3D->texParameteri(GraphicsContext3D::TEXTURE_2D, GraphicsContext3D::TEXTURE_MIN_FILTER, GraphicsContext3D::LINEAR);
m_context3D->texParameterf(GraphicsContext3D::TEXTURE_2D, GraphicsContext3D::TEXTURE_WRAP_S, GraphicsContext3D::CLAMP_TO_EDGE);
m_context3D->texParameterf(GraphicsContext3D::TEXTURE_2D, GraphicsContext3D::TEXTURE_WRAP_T, GraphicsContext3D::CLAMP_TO_EDGE);
// Set the viewport.
m_context3D->viewport(0, 0, m_size.width(), m_size.height());
// Set program parameters.
m_context3D->useProgram(m_shaderProgram->programID());
m_context3D->uniform1i(m_shaderProgram->samplerLocation(), 0);
m_shaderProgram->setMatrix(m_shaderProgram->modelViewMatrixLocation(), m_modelViewMatrix);
m_shaderProgram->setMatrix(m_shaderProgram->projectionMatrixLocation(), m_projectionMatrix);
m_shaderProgram->setMatrix(m_shaderProgram->textureSpaceMatrixLocation(), m_textureSpaceMatrix);
// Perform the copy.
m_context3D->enableVertexAttribArray(m_shaderProgram->vertexLocation());
m_context3D->bindBuffer(GraphicsContext3D::ARRAY_BUFFER, m_vbo);
m_context3D->vertexAttribPointer(m_shaderProgram->vertexLocation(), 2, GraphicsContext3D::FLOAT, false, 0, 0);
m_context3D->drawArrays(GraphicsContext3D::TRIANGLE_FAN, 0, 4);
m_context3D->bindBuffer(GraphicsContext3D::ARRAY_BUFFER, 0);
m_context3D->disableVertexAttribArray(m_shaderProgram->vertexLocation());
m_context3D->useProgram(0);
// Restore previous bindings and viewport.
m_context3D->bindFramebuffer(GraphicsContext3D::FRAMEBUFFER, boundFramebuffer);
m_context3D->bindTexture(outputTarget, boundTexture);
m_context3D->viewport(previousViewport[0], previousViewport[1], previousViewport[2], previousViewport[3]);
bool ok = (m_context3D->getError() == GraphicsContext3D::NO_ERROR);
// Restore previous context.
previousContext->makeContextCurrent();
return ok;
}
} // namespace WebCore
#endif // USE(GSTREAMER_GL)
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