gecko-dev/gfx/gl/TextureImageCGL.mm

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/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* 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 "TextureImageCGL.h"
#include "GLContext.h"
#include "gfx2DGlue.h"
#include "gfxQuartzSurface.h"
#include "gfxPlatform.h"
#include "gfxFailure.h"
namespace mozilla {
using namespace gfx;
namespace gl {
TextureImageCGL::TextureImageCGL(GLuint aTexture,
const nsIntSize& aSize,
GLenum aWrapMode,
ContentType aContentType,
GLContext* aContext,
TextureImage::Flags aFlags,
TextureImage::ImageFormat aImageFormat)
: BasicTextureImage(aTexture, aSize, aWrapMode, aContentType,
aContext, aFlags, aImageFormat)
, mPixelBuffer(0)
, mPixelBufferSize(0)
, mBoundPixelBuffer(false)
{}
TextureImageCGL::~TextureImageCGL()
{
if (mPixelBuffer) {
mGLContext->MakeCurrent();
mGLContext->fDeleteBuffers(1, &mPixelBuffer);
}
}
already_AddRefed<gfxASurface>
TextureImageCGL::GetSurfaceForUpdate(const gfxIntSize& aSize, ImageFormat aFmt)
{
IntSize size(aSize.width + 1, aSize.height + 1);
mGLContext->MakeCurrent();
if (!mGLContext->
IsExtensionSupported(GLContext::ARB_pixel_buffer_object))
{
return gfxPlatform::GetPlatform()->
CreateOffscreenSurface(size,
gfxASurface::ContentFromFormat(aFmt));
}
if (!mPixelBuffer) {
mGLContext->fGenBuffers(1, &mPixelBuffer);
}
mGLContext->fBindBuffer(LOCAL_GL_PIXEL_UNPACK_BUFFER, mPixelBuffer);
int32_t length = size.width * 4 * size.height;
if (length > mPixelBufferSize) {
mGLContext->fBufferData(LOCAL_GL_PIXEL_UNPACK_BUFFER, length,
NULL, LOCAL_GL_STREAM_DRAW);
mPixelBufferSize = length;
}
unsigned char* data =
(unsigned char*)mGLContext->
fMapBuffer(LOCAL_GL_PIXEL_UNPACK_BUFFER,
LOCAL_GL_WRITE_ONLY);
mGLContext->fBindBuffer(LOCAL_GL_PIXEL_UNPACK_BUFFER, 0);
if (!data) {
nsAutoCString failure;
failure += "Pixel buffer binding failed: ";
failure.AppendPrintf("%dx%d\n", size.width, size.height);
gfx::LogFailure(failure);
mGLContext->fBindBuffer(LOCAL_GL_PIXEL_UNPACK_BUFFER, 0);
return gfxPlatform::GetPlatform()->
CreateOffscreenSurface(size,
gfxASurface::ContentFromFormat(aFmt));
}
nsRefPtr<gfxQuartzSurface> surf =
new gfxQuartzSurface(data, ThebesIntSize(size), size.width * 4, aFmt);
mBoundPixelBuffer = true;
return surf.forget();
}
bool
TextureImageCGL::FinishedSurfaceUpdate()
{
if (mBoundPixelBuffer) {
mGLContext->MakeCurrent();
mGLContext->fBindBuffer(LOCAL_GL_PIXEL_UNPACK_BUFFER, mPixelBuffer);
mGLContext->fUnmapBuffer(LOCAL_GL_PIXEL_UNPACK_BUFFER);
return true;
}
return false;
}
void
TextureImageCGL::FinishedSurfaceUpload()
{
if (mBoundPixelBuffer) {
mGLContext->MakeCurrent();
mGLContext->fBindBuffer(LOCAL_GL_PIXEL_UNPACK_BUFFER, 0);
mBoundPixelBuffer = false;
}
}
already_AddRefed<TextureImage>
CreateTextureImageCGL(GLContext* gl,
const gfx::IntSize& aSize,
TextureImage::ContentType aContentType,
GLenum aWrapMode,
TextureImage::Flags aFlags,
TextureImage::ImageFormat aImageFormat)
{
if (!gl->IsOffscreenSizeAllowed(aSize) &&
gfxPlatform::OffMainThreadCompositingEnabled()) {
NS_ASSERTION(aWrapMode == LOCAL_GL_CLAMP_TO_EDGE, "Can't support wrapping with tiles!");
nsRefPtr<TextureImage> t = new gl::TiledTextureImage(gl, aSize, aContentType,
aFlags, aImageFormat);
return t.forget();
}
return CreateBasicTextureImage(gl, aSize, aContentType, aWrapMode,
aFlags, aImageFormat);
}
already_AddRefed<TextureImage>
TileGenFuncCGL(GLContext *gl,
const nsIntSize& aSize,
TextureImage::ContentType aContentType,
TextureImage::Flags aFlags,
TextureImage::ImageFormat aImageFormat)
{
bool useNearestFilter = aFlags & TextureImage::UseNearestFilter;
gl->MakeCurrent();
GLuint texture;
gl->fGenTextures(1, &texture);
gl->fActiveTexture(LOCAL_GL_TEXTURE0);
gl->fBindTexture(LOCAL_GL_TEXTURE_2D, texture);
GLint texfilter = useNearestFilter ? LOCAL_GL_NEAREST : LOCAL_GL_LINEAR;
gl->fTexParameteri(LOCAL_GL_TEXTURE_2D, LOCAL_GL_TEXTURE_MIN_FILTER, texfilter);
gl->fTexParameteri(LOCAL_GL_TEXTURE_2D, LOCAL_GL_TEXTURE_MAG_FILTER, texfilter);
gl->fTexParameteri(LOCAL_GL_TEXTURE_2D, LOCAL_GL_TEXTURE_WRAP_S, LOCAL_GL_CLAMP_TO_EDGE);
gl->fTexParameteri(LOCAL_GL_TEXTURE_2D, LOCAL_GL_TEXTURE_WRAP_T, LOCAL_GL_CLAMP_TO_EDGE);
nsRefPtr<TextureImageCGL> teximage
(new TextureImageCGL(texture, aSize, LOCAL_GL_CLAMP_TO_EDGE, aContentType,
gl, aFlags, aImageFormat));
return teximage.forget();
}
}
}