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