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/* -*- Mode: objc; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "RectTextureImage.h"
#include "gfxUtils.h"
#include "GLContextCGL.h"
#include "mozilla/layers/GLManager.h"
#include "mozilla/gfx/MacIOSurface.h"
#include "OGLShaderProgram.h"
#include "ScopedGLHelpers.h"
namespace mozilla {
namespace widget {
RectTextureImage::RectTextureImage()
: mGLContext(nullptr)
, mTexture(0)
, mInUpdate(false)
{
}
RectTextureImage::~RectTextureImage()
{
DeleteTexture();
}
already_AddRefed<gfx::DrawTarget>
RectTextureImage::BeginUpdate(const LayoutDeviceIntSize& aNewSize,
const LayoutDeviceIntRegion& aDirtyRegion)
{
MOZ_ASSERT(!mInUpdate, "Beginning update during update!");
mUpdateRegion = aDirtyRegion;
bool needRecreate = false;
if (aNewSize != mBufferSize) {
mBufferSize = aNewSize;
mUpdateRegion =
LayoutDeviceIntRect(LayoutDeviceIntPoint(0, 0), aNewSize);
needRecreate = true;
}
if (mUpdateRegion.IsEmpty()) {
return nullptr;
}
if (!mIOSurface || needRecreate) {
DeleteTexture();
mIOSurface = MacIOSurface::CreateIOSurface(mBufferSize.width,
mBufferSize.height);
if (!mIOSurface) {
return nullptr;
}
}
mInUpdate = true;
mIOSurface->Lock(false);
unsigned char* ioData = (unsigned char*)mIOSurface->GetBaseAddress();
gfx::IntSize size(mBufferSize.width, mBufferSize.height);
int32_t stride = mIOSurface->GetBytesPerRow();
gfx::SurfaceFormat format = gfx::SurfaceFormat::B8G8R8A8;
RefPtr<gfx::DrawTarget> drawTarget =
gfx::Factory::CreateDrawTargetForData(gfx::BackendType::SKIA,
ioData, size,
stride, format);
return drawTarget.forget();
}
void
RectTextureImage::EndUpdate()
{
MOZ_ASSERT(mInUpdate, "Ending update while not in update");
mIOSurface->Unlock(false);
mInUpdate = false;
}
void
RectTextureImage::UpdateFromCGContext(const LayoutDeviceIntSize& aNewSize,
const LayoutDeviceIntRegion& aDirtyRegion,
CGContextRef aCGContext)
{
gfx::IntSize size = gfx::IntSize(CGBitmapContextGetWidth(aCGContext),
CGBitmapContextGetHeight(aCGContext));
RefPtr<gfx::DrawTarget> dt = BeginUpdate(aNewSize, aDirtyRegion);
if (dt) {
gfx::Rect rect(0, 0, size.width, size.height);
gfxUtils::ClipToRegion(dt, GetUpdateRegion().ToUnknownRegion());
RefPtr<gfx::SourceSurface> sourceSurface =
dt->CreateSourceSurfaceFromData(static_cast<uint8_t *>(CGBitmapContextGetData(aCGContext)),
size,
CGBitmapContextGetBytesPerRow(aCGContext),
gfx::SurfaceFormat::B8G8R8A8);
dt->DrawSurface(sourceSurface, rect, rect,
gfx::DrawSurfaceOptions(),
gfx::DrawOptions(1.0, gfx::CompositionOp::OP_SOURCE));
dt->PopClip();
EndUpdate();
}
}
void
RectTextureImage::Draw(layers::GLManager* aManager,
const LayoutDeviceIntPoint& aLocation,
const gfx::Matrix4x4& aTransform)
{
gl::GLContext* gl = aManager->gl();
BindIOSurfaceToTexture(gl);
layers::ShaderProgramOGL* program =
aManager->GetProgram(LOCAL_GL_TEXTURE_RECTANGLE_ARB,
gfx::SurfaceFormat::R8G8B8A8);
gl->fActiveTexture(LOCAL_GL_TEXTURE0);
gl::ScopedBindTexture texture(gl, mTexture, LOCAL_GL_TEXTURE_RECTANGLE_ARB);
aManager->ActivateProgram(program);
program->SetProjectionMatrix(aManager->GetProjMatrix());
program->SetLayerTransform(gfx::Matrix4x4(aTransform).PostTranslate(aLocation.x, aLocation.y, 0));
program->SetTextureTransform(gfx::Matrix4x4());
program->SetRenderOffset(nsIntPoint(0, 0));
program->SetTexCoordMultiplier(mBufferSize.width, mBufferSize.height);
program->SetTextureUnit(0);
aManager->BindAndDrawQuad(program,
gfx::Rect(0.0, 0.0, mBufferSize.width, mBufferSize.height),
gfx::Rect(0.0, 0.0, 1.0f, 1.0f));
}
void
RectTextureImage::DeleteTexture()
{
if (mTexture) {
MOZ_ASSERT(mGLContext);
mGLContext->MakeCurrent();
mGLContext->fDeleteTextures(1, &mTexture);
mTexture = 0;
}
}
void
RectTextureImage::BindIOSurfaceToTexture(gl::GLContext* aGL)
{
if (!mTexture) {
MOZ_ASSERT(aGL);
aGL->fGenTextures(1, &mTexture);
aGL->fActiveTexture(LOCAL_GL_TEXTURE0);
gl::ScopedBindTexture texture(aGL, mTexture, LOCAL_GL_TEXTURE_RECTANGLE_ARB);
aGL->fTexParameteri(LOCAL_GL_TEXTURE_RECTANGLE_ARB,
LOCAL_GL_TEXTURE_MIN_FILTER,
LOCAL_GL_LINEAR);
aGL->fTexParameteri(LOCAL_GL_TEXTURE_RECTANGLE_ARB,
LOCAL_GL_TEXTURE_MAG_FILTER,
LOCAL_GL_LINEAR);
aGL->fTexParameteri(LOCAL_GL_TEXTURE_RECTANGLE_ARB,
LOCAL_GL_TEXTURE_WRAP_T,
LOCAL_GL_CLAMP_TO_EDGE);
aGL->fTexParameteri(LOCAL_GL_TEXTURE_RECTANGLE_ARB,
LOCAL_GL_TEXTURE_WRAP_S,
LOCAL_GL_CLAMP_TO_EDGE);
mIOSurface->CGLTexImageIOSurface2D(gl::GLContextCGL::Cast(aGL)->GetCGLContext());
mGLContext = aGL;
}
}
} // namespace widget
} // namespace mozilla
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