/* *  Copyright (c) 2010 The VP8 project authors. All Rights Reserved. * *  Use of this source code is governed by a BSD-style license *  that can be found in the LICENSE file in the root of the source *  tree. An additional intellectual property rights grant can be found *  in the file PATENTS.  All contributing project authors may *  be found in the AUTHORS file in the root of the source tree. */  /******************************************************************************   Module Title :     xprintf.cpp**   Description  :     Display a printf style message on the current video frame.*****************************************************************************/ /*****************************************************************************  Header Files****************************************************************************/ #include <stdio.h>#include <stdarg.h>#ifdef _WIN32_WCE#include <windows.h>#endif#include "xprintf.h" /**************************************************************************** * *  ROUTINE       : xprintf * *  INPUTS        : const PB_INSTANCE *ppbi : Pointer to decoder instance. *                  long n_pixel             : Offset into buffer to write text. *                  const char *format      : Format string for print. *                  ...                     : Variable length argument list. * *  OUTPUTS       : None. * *  RETURNS       : int: Size (in bytes) of the formatted text. * *  FUNCTION      : Display a printf style message on the current video frame. * *  SPECIAL NOTES : None. * ****************************************************************************/int onyx_xprintf(unsigned char *ppbuffer, long n_pixel, long n_size, long n_stride, const char *format, ...){    BOOL b_rc;    va_list arglist;    HFONT hfont, hfonto;     int rc = 0;    char sz_formatted[256] = "";    unsigned char *p_dest = &ppbuffer[n_pixel]; #ifdef _WIN32_WCE    //  Set up temporary bitmap    HDC hdc_memory   = NULL;    HBITMAP hbm_temp = NULL;    HBITMAP hbm_orig = NULL;     RECT rect;     //  Copy bitmap to video frame    long x;    long y;     //  Format text    va_start(arglist, format);    _vsnprintf(sz_formatted, sizeof(sz_formatted), format, arglist);    va_end(arglist);     rect.left   = 0;    rect.top    = 0;    rect.right  = 8 * strlen(sz_formatted);    rect.bottom = 8;     hdc_memory = create_compatible_dc(NULL);     if (hdc_memory == NULL)        goto Exit;     hbm_temp = create_bitmap(rect.right, rect.bottom, 1, 1, NULL);     if (hbm_temp == NULL)        goto Exit;     hbm_orig = (HBITMAP)(select_object(hdc_memory, hbm_temp));     if (!hbm_orig)        goto Exit;     //  Write text into bitmap    //  font?    hfont = create_font(8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, VARIABLE_PITCH | FF_SWISS, "");     if (hfont == NULL)        goto Exit;     hfonto = (HFONT)(select_object(hdc_memory, hbm_temp));     if (!hfonto)        goto Exit;     select_object(hdc_memory, hfont);    set_text_color(hdc_memory, 1);    set_bk_color(hdc_memory, 0);    set_bk_mode(hdc_memory, TRANSPARENT);     b_rc = bit_blt(hdc_memory, rect.left, rect.top, rect.right, rect.bottom, hdc_memory, rect.left, rect.top, BLACKNESS);     if (!b_rc)        goto Exit;     b_rc = ext_text_out(hdc_memory, 0, 0, ETO_CLIPPED, &rect, sz_formatted, strlen(sz_formatted), NULL);     if (!b_rc)        goto Exit;     for (y = rect.top; y < rect.bottom; ++y)    {        for (x = rect.left; x < rect.right; ++x)        {            if (get_pixel(hdc_memory, x, rect.bottom - 1 - y))                p_dest[x] = 255;        }         p_dest += n_stride;    }     rc = strlen(sz_formatted); Exit:     if (hbm_temp != NULL)    {        if (hbm_orig != NULL)        {            select_object(hdc_memory, hbm_orig);        }         delete_object(hbm_temp);    }     if (hfont != NULL)    {        if (hfonto != NULL)            select_object(hdc_memory, hfonto);         delete_object(hfont);    }     if (hdc_memory != NULL)        delete_dc(hdc_memory);     hdc_memory = 0; #endif     return rc;}