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comparison win/dw.c @ 1243:c191a562c14a

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Added new dw_pixmap_stretch_bitblt() function on Windows and OS/2. Added new strech option to the test program to test this functionality. OS/2 version is untested and I am not sure I got the math right... GTK and Mac versions to come soon.
author bsmith@81767d24-ef19-dc11-ae90-00e081727c95
date Wed, 19 Oct 2011 08:14:05 +0000
parents 700ce342aab8
children ed2119fc210d
comparison
equal deleted inserted replaced
1242:8e37ebb3fab7 1243:c191a562c14a
9022 * xsrc: X coordinate of source. 9022 * xsrc: X coordinate of source.
9023 * ysrc: Y coordinate of source. 9023 * ysrc: Y coordinate of source.
9024 */ 9024 */
9025 void API dw_pixmap_bitblt(HWND dest, HPIXMAP destp, int xdest, int ydest, int width, int height, HWND src, HPIXMAP srcp, int xsrc, int ysrc) 9025 void API dw_pixmap_bitblt(HWND dest, HPIXMAP destp, int xdest, int ydest, int width, int height, HWND src, HPIXMAP srcp, int xsrc, int ysrc)
9026 { 9026 {
9027 dw_pixmap_stretch_bitblt(dest, destp, xdest, ydest, width, height, src, srcp, xsrc, ysrc, -1, -1);
9028 }
9029
9030 /*
9031 * Copies from one surface to another allowing for stretching.
9032 * Parameters:
9033 * dest: Destination window handle.
9034 * destp: Destination pixmap. (choose only one).
9035 * xdest: X coordinate of destination.
9036 * ydest: Y coordinate of destination.
9037 * width: Width of the target area.
9038 * height: Height of the target area.
9039 * src: Source window handle.
9040 * srcp: Source pixmap. (choose only one).
9041 * xsrc: X coordinate of source.
9042 * ysrc: Y coordinate of source.
9043 * srcwidth: Width of area to copy.
9044 * srcheight: Height of area to copy.
9045 * Returns:
9046 * DW_ERROR_NONE on success and DW_ERROR_GENERAL on failure.
9047 */
9048 int API dw_pixmap_stretch_bitblt(HWND dest, HPIXMAP destp, int xdest, int ydest, int width, int height, HWND src, HPIXMAP srcp, int xsrc, int ysrc, int srcwidth, int srcheight)
9049 {
9027 HDC hdcdest; 9050 HDC hdcdest;
9028 HDC hdcsrc; 9051 HDC hdcsrc;
9029 static BLENDFUNCTION bf = { AC_SRC_OVER, 0, 0xFF, AC_SRC_ALPHA }; 9052 static BLENDFUNCTION bf = { AC_SRC_OVER, 0, 0xFF, AC_SRC_ALPHA };
9030 9053 int swidth = srcwidth, sheight = srcheight;
9054
9055 /* Do some sanity checks */
9031 if ( dest ) 9056 if ( dest )
9032 hdcdest = GetDC( dest ); 9057 hdcdest = GetDC( dest );
9033 else if ( destp ) 9058 else if ( destp )
9034 hdcdest = destp->hdc; 9059 hdcdest = destp->hdc;
9035 else 9060 else
9036 return; 9061 return DW_ERROR_GENERAL;
9037 9062
9038 if ( src ) 9063 if ( src )
9039 hdcsrc = GetDC( src ); 9064 hdcsrc = GetDC( src );
9040 else if ( srcp ) 9065 else if ( srcp )
9041 hdcsrc = srcp->hdc; 9066 hdcsrc = srcp->hdc;
9042 else 9067 else
9043 return; 9068 return DW_ERROR_GENERAL;
9069
9070 if((srcheight == -1 || srcwidth == -1) && srcheight != srcwidth)
9071 return DW_ERROR_GENERAL;
9072
9073 if(srcheight == -1 && srcwidth == -1)
9074 {
9075 swidth = width;
9076 sheight = height;
9077 }
9044 9078
9045 /* If it is a 32bpp bitmap (with alpha) use AlphaBlend unless it fails */ 9079 /* If it is a 32bpp bitmap (with alpha) use AlphaBlend unless it fails */
9046 if ( srcp && srcp->depth == 32 && AlphaBlend( hdcdest, xdest, ydest, width, height, hdcsrc, xsrc, ysrc, width, height, bf ) ) 9080 if ( srcp && srcp->depth == 32 && AlphaBlend( hdcdest, xdest, ydest, width, height, hdcsrc, xsrc, ysrc, swidth, sheight, bf ) )
9047 { 9081 {
9048 /* Don't do anything */ 9082 /* Don't do anything */
9049 } 9083 }
9050 /* Otherwise perform special bitblt with manual transparency */ 9084 /* Otherwise perform special bitblt with manual transparency */
9051 else if ( srcp && srcp->transcolor != DW_RGB_TRANSPARENT ) 9085 else if ( srcp && srcp->transcolor != DW_RGB_TRANSPARENT )
9052 { 9086 {
9053 TransparentBlt( hdcdest, xdest, ydest, width, height, hdcsrc, xsrc, ysrc, width, height, RGB( DW_RED_VALUE(srcp->transcolor), DW_GREEN_VALUE(srcp->transcolor), DW_BLUE_VALUE(srcp->transcolor)) ); 9087 TransparentBlt( hdcdest, xdest, ydest, width, height, hdcsrc, xsrc, ysrc, swidth, sheight, RGB( DW_RED_VALUE(srcp->transcolor), DW_GREEN_VALUE(srcp->transcolor), DW_BLUE_VALUE(srcp->transcolor)) );
9054 } 9088 }
9055 else 9089 else
9056 { 9090 {
9057 /* Finally fall back to the classic BitBlt */ 9091 /* Finally fall back to the classic BitBlt */
9058 BitBlt( hdcdest, xdest, ydest, width, height, hdcsrc, xsrc, ysrc, SRCCOPY ); 9092 if( srcwidth == -1 && srcheight == -1)
9093 BitBlt( hdcdest, xdest, ydest, width, height, hdcsrc, xsrc, ysrc, SRCCOPY );
9094 else
9095 StretchBlt( hdcdest, xdest, ydest, width, height, hdcsrc, xsrc, ysrc, swidth, sheight, SRCCOPY );
9059 } 9096 }
9060 if ( !destp ) 9097 if ( !destp )
9061 ReleaseDC( dest, hdcdest ); 9098 ReleaseDC( dest, hdcdest );
9062 if ( !srcp ) 9099 if ( !srcp )
9063 ReleaseDC( src, hdcsrc ); 9100 ReleaseDC( src, hdcsrc );
9101
9102 return DW_ERROR_NONE;
9064 } 9103 }
9065 9104
9066 /* Run Beep() in a separate thread so it doesn't block */ 9105 /* Run Beep() in a separate thread so it doesn't block */
9067 void _beepthread(void *data) 9106 void _beepthread(void *data)
9068 { 9107 {