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PaintBuffer.h

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// Copyright (c) 2012-2014 The CEF Python authors. All rights reserved.

// License: New BSD License.

// Website: http://code.google.com/p/cefpython/

#pragma once

// OS_WIN is not defined on Windows when CEF is not included.

// _WIN32 is defined on both 32bit and 64bit.

#if defined(_WIN32)

#include "windows.h"

#include "stdint_win.h"

#include <stdio.h>

#else

#include <stdint.h>

#include <string.h>

#endif

void FlipBufferUpsideDown(void* _dest, const void* _src, int width, int height \

) {

// In CEF the buffer passed to Browser.GetImage() & RenderHandler.OnPaint()

// has upper-left origin, but some libraries like Panda3D require

// bottom-left origin.

int32_t* dest = (int32_t*)_dest;

int32_t* src = (int32_t*)_src;

unsigned int tb;

int length = width*height;

for (int y = 0; y < height; y++) {

tb = length - ((y+1)*width);

memcpy(&dest[tb], &src[y*width], width*4);

}

}

void SwapBufferFromBgraToRgba(void* _dest, const void* _src, int width, \

int height) {

int32_t* dest = (int32_t*)_dest;

int32_t* src = (int32_t*)_src;

int32_t rgba;

int32_t bgra;

int length = width*height;

for (int i = 0; i < length; i++) {

bgra = src[i];

// BGRA in hex = 0xAARRGGBB.

rgba = (bgra & 0x00ff0000) >> 16 // Red >> Blue.

| (bgra & 0xff00ff00) // Green Alpha.

| (bgra & 0x000000ff) << 16; // Blue >> Red.

dest[i] = rgba;

}

}