File 0007-qpixmap_constants.patch of Package qt3

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File 0007-qpixmap_constants.patch of Package qt3 (Revision 0624bf5c0bfafbb48983a6087d6723c7)

Currently displaying revision 0624bf5c0bfafbb48983a6087d6723c7 , Show latest

qt-bugs@ issue : 11790 (part of)
applied: no
author: Lubos Lunak <l.lunak@kde.org>

See 0005-qpixmap_mitshm.patch for details.

--- src/kernel/qpixmap_x11.cpp
+++ src/kernel/qpixmap_x11.cpp
@@ -1123,9 +1123,6 @@ bool QPixmap::convertFromImage( const QI
 	    return FALSE;
 	int    bppc = xi->bits_per_pixel;
 
-	if ( bppc > 8 && xi->byte_order == LSBFirst )
-	    bppc++;
-
 	bool contig_bits = n_bits(red_mask) == rbits &&
                            n_bits(green_mask) == gbits &&
                            n_bits(blue_mask) == bbits;
@@ -1174,32 +1171,70 @@ bool QPixmap::convertFromImage( const QI
 	    }
 	    init=TRUE;
 	}
+        
+        enum { BPP8, 
+               BPP16_8_3_M3, BPP16_7_2_M3, BPP16_MSB, BPP16_LSB,
+               BPP24_MSB, BPP24_LSB,
+               BPP32_16_8_0, BPP32_MSB, BPP32_LSB
+        } mode = BPP8;
 
-	for ( uint y=0; y<h; y++ ) {
-	    uchar* src = image.scanLine( y );
-	    uchar* dst = newbits + xi->bytes_per_line*y;
-	    QRgb* p = (QRgb *)src;
+	if ( bppc > 8 && xi->byte_order == LSBFirst )
+	    bppc++;
 
-#define GET_RGB \
-		int r = qRed  ( *p ); \
-		int g = qGreen( *p ); \
-		int b = qBlue ( *p++ ); \
-		r = red_shift   > 0 \
-		    ? r << red_shift   : r >> -red_shift; \
-		g = green_shift > 0 \
-		    ? g << green_shift : g >> -green_shift; \
-		b = blue_shift  > 0 \
-		    ? b << blue_shift  : b >> -blue_shift;
+        int wordsize;
+        bool bigendian;
+        qSysInfo( &wordsize, &bigendian );
+        bool same_msb_lsb = ( xi->byte_order == MSBFirst ) == ( bigendian );
+        
+        if( bppc == 8 ) // 8 bit
+            mode = BPP8;
+        else if( bppc == 16 || bppc == 17 ) { // 16 bit MSB/LSB
+            if( red_shift == 8 && green_shift == 3 && blue_shift == -3
+                && !d8 && same_msb_lsb )
+                mode = BPP16_8_3_M3;
+            else if( red_shift == 7 && green_shift == 2 && blue_shift == -3
+                && !d8 && same_msb_lsb )
+                mode = BPP16_7_2_M3;
+            else
+                mode = bppc == 17 ? BPP16_LSB : BPP16_MSB;
+        } else if( bppc == 24 || bppc == 25 ) { // 24 bit MSB/LSB
+            mode = bppc == 25 ? BPP24_LSB : BPP24_MSB;
+        } else if( bppc == 32 || bppc == 33 ) { // 32 bit MSB/LSB
+            if( red_shift == 16 && green_shift == 8 && blue_shift == 0
+                && !d8 && same_msb_lsb )
+                mode = BPP32_16_8_0;
+            else
+                mode = bppc == 33 ? BPP32_LSB : BPP32_MSB;
+        } else
+	    qFatal("Logic error 3");
 
 #define GET_PIXEL \
                 int pixel; \
 		if ( d8 ) pixel = pix[*src++]; \
 		else { \
-		    GET_RGB \
-		    pixel = (b & blue_mask)|(g & green_mask) | (r & red_mask) \
+		    int r = qRed  ( *p ); \
+		    int g = qGreen( *p ); \
+		    int b = qBlue ( *p++ ); \
+		    r = red_shift   > 0 \
+		        ? r << red_shift   : r >> -red_shift; \
+		    g = green_shift > 0 \
+		        ? g << green_shift : g >> -green_shift; \
+		    b = blue_shift  > 0 \
+		        ? b << blue_shift  : b >> -blue_shift; \
+		    pixel = (r & red_mask)|(g & green_mask) | (b & blue_mask) \
 			    | ~(blue_mask | green_mask | red_mask); \
 		}
 
+// optimized case - no d8 case, shift only once instead of twice, mask only once instead of twice,
+// use direct values instead of variables, and use only one statement
+// (*p >> 16), (*p >> 8 ) and (*p) are qRed(),qGreen() and qBlue() without masking
+// shifts have to be passed including the shift operator (e.g. '>>3'), because of the direction
+#define GET_PIXEL_OPT(red_shift,green_shift,blue_shift,red_mask,green_mask,blue_mask) \
+                int pixel = ((( *p >> 16 ) red_shift ) & red_mask ) \
+                    | ((( *p >> 8 ) green_shift ) & green_mask ) \
+                    | ((( *p ) blue_shift ) & blue_mask ); \
+                ++p;
+
 #define GET_PIXEL_DITHER_TC \
 		int r = qRed  ( *p ); \
 		int g = qGreen( *p ); \
@@ -1220,91 +1255,177 @@ bool QPixmap::convertFromImage( const QI
 		    ? g << green_shift : g >> -green_shift; \
 		b = blue_shift  > 0 \
 		    ? b << blue_shift  : b >> -blue_shift; \
-		int pixel = (b & blue_mask)|(g & green_mask) | (r & red_mask);
+		int pixel = (r & red_mask)|(g & green_mask) | (b & blue_mask);
 
-	    if ( dither_tc ) {
-		uint x;
-		switch ( bppc ) {
-		case 16:			// 16 bit MSB
-		    for ( x=0; x<w; x++ ) {
-			GET_PIXEL_DITHER_TC
-			*dst++ = (pixel >> 8);
-			*dst++ = pixel;
-		    }
+// again, optimized case
+// can't be optimized that much :(
+#define GET_PIXEL_DITHER_TC_OPT(red_shift,green_shift,blue_shift,red_mask,green_mask,blue_mask, \
+                                rbits,gbits,bbits) \
+		const int thres = D[x%16][y%16]; \
+		int r = qRed  ( *p ); \
+		if ( r <= (255-(1<<(8-rbits))) && ((r<<rbits) & 255) \
+			> thres) \
+		    r += (1<<(8-rbits)); \
+		int g = qGreen( *p ); \
+		if ( g <= (255-(1<<(8-gbits))) && ((g<<gbits) & 255) \
+			> thres) \
+		    g += (1<<(8-gbits)); \
+		int b = qBlue ( *p++ ); \
+		if ( b <= (255-(1<<(8-bbits))) && ((b<<bbits) & 255) \
+			> thres) \
+		    b += (1<<(8-bbits)); \
+                int pixel = (( r red_shift ) & red_mask ) \
+                    | (( g green_shift ) & green_mask ) \
+                    | (( b blue_shift ) & blue_mask );
+
+#define CYCLE(body) \
+	for ( uint y=0; y<h; y++ ) { \
+	    uchar* src = image.scanLine( y ); \
+	    uchar* dst = newbits + xi->bytes_per_line*y; \
+	    QRgb* p = (QRgb *)src; \
+            body \
+        }
+
+        if ( dither_tc ) {
+	    switch ( mode ) {
+                case BPP16_8_3_M3:
+                    CYCLE(
+                        Q_INT16* dst16 = (Q_INT16*)dst;
+		        for ( uint x=0; x<w; x++ ) {
+			    GET_PIXEL_DITHER_TC_OPT(<<8,<<3,>>3,0xf800,0x7e0,0x1f,5,6,5)
+                            *dst16++ = pixel;
+		        }
+                    )
 		    break;
-		case 17:			// 16 bit LSB
-		    for ( x=0; x<w; x++ ) {
-			GET_PIXEL_DITHER_TC
-			*dst++ = pixel;
-			*dst++ = pixel >> 8;
-		    }
+                case BPP16_7_2_M3:
+                    CYCLE(
+                        Q_INT16* dst16 = (Q_INT16*)dst;
+		        for ( uint x=0; x<w; x++ ) {
+			    GET_PIXEL_DITHER_TC_OPT(<<7,<<2,>>3,0x7c00,0x3e0,0x1f,5,5,5)
+                            *dst16++ = pixel;
+		        }
+                    )
+		    break;
+		case BPP16_MSB:			// 16 bit MSB
+                    CYCLE(
+		        for ( uint x=0; x<w; x++ ) {
+			    GET_PIXEL_DITHER_TC
+			    *dst++ = (pixel >> 8);
+			    *dst++ = pixel;
+		        }
+                    )
+		    break;
+		case BPP16_LSB:			// 16 bit LSB
+                    CYCLE(
+    		        for ( uint x=0; x<w; x++ ) {
+			    GET_PIXEL_DITHER_TC
+			    *dst++ = pixel;
+			    *dst++ = pixel >> 8;
+		        }
+                    )
 		    break;
 		default:
 		    qFatal("Logic error");
 		}
-	    } else {
-		uint x;
-		switch ( bppc ) {
-		case 8:			// 8 bit
-		    for ( x=0; x<w; x++ ) {
-			int pixel = pix[*src++];
-			*dst++ = pixel;
-		    }
+	} else {
+	    switch ( mode ) {
+		case BPP8:			// 8 bit
+                    CYCLE(
+                    Q_UNUSED(p);
+		        for ( uint x=0; x<w; x++ ) {
+			    int pixel = pix[*src++];
+			    *dst++ = pixel;
+		        }
+                    )
 		    break;
-		case 16:			// 16 bit MSB
-		    for ( x=0; x<w; x++ ) {
-			GET_PIXEL
-			*dst++ = (pixel >> 8);
-			*dst++ = pixel;
-		    }
+                case BPP16_8_3_M3:
+                    CYCLE(
+                        Q_INT16* dst16 = (Q_INT16*)dst;
+		        for ( uint x=0; x<w; x++ ) {
+			    GET_PIXEL_OPT(<<8,<<3,>>3,0xf800,0x7e0,0x1f)
+                            *dst16++ = pixel;
+		        }
+                    )
 		    break;
-		case 17:			// 16 bit LSB
-		    for ( x=0; x<w; x++ ) {
-			GET_PIXEL
-			*dst++ = pixel;
-			*dst++ = pixel >> 8;
-		    }
+                case BPP16_7_2_M3:
+                    CYCLE(
+                        Q_INT16* dst16 = (Q_INT16*)dst;
+		        for ( uint x=0; x<w; x++ ) {
+			    GET_PIXEL_OPT(<<7,<<2,>>3,0x7c00,0x3e0,0x1f)
+                            *dst16++ = pixel;
+		        }
+                    )
 		    break;
-		case 24:			// 24 bit MSB
-		    for ( x=0; x<w; x++ ) {
-			GET_PIXEL
-			*dst++ = pixel >> 16;
-			*dst++ = pixel >> 8;
-			*dst++ = pixel;
-		    }
+		case BPP16_MSB:			// 16 bit MSB
+                    CYCLE(
+		        for ( uint x=0; x<w; x++ ) {
+			    GET_PIXEL
+			    *dst++ = (pixel >> 8);
+			    *dst++ = pixel;
+		        }
+                    )
 		    break;
-		case 25:			// 24 bit LSB
-		    for ( x=0; x<w; x++ ) {
-			GET_PIXEL
-			*dst++ = pixel;
-			*dst++ = pixel >> 8;
-			*dst++ = pixel >> 16;
-		    }
+		case BPP16_LSB:			// 16 bit LSB
+                    CYCLE(
+		        for ( uint x=0; x<w; x++ ) {
+			    GET_PIXEL
+			    *dst++ = pixel;
+			    *dst++ = pixel >> 8;
+		        }
+                    )
 		    break;
-		case 32:			// 32 bit MSB
-		    for ( x=0; x<w; x++ ) {
-			GET_PIXEL
-			*dst++ = pixel >> 24;
-			*dst++ = pixel >> 16;
-			*dst++ = pixel >> 8;
-			*dst++ = pixel;
-		    }
+		case BPP24_MSB:			// 24 bit MSB
+                    CYCLE(
+		        for ( uint x=0; x<w; x++ ) {
+			    GET_PIXEL
+			    *dst++ = pixel >> 16;
+			    *dst++ = pixel >> 8;
+			    *dst++ = pixel;
+		        }
+                    )
 		    break;
-		case 33:			// 32 bit LSB
-		    for ( x=0; x<w; x++ ) {
-			GET_PIXEL
-			*dst++ = pixel;
-			*dst++ = pixel >> 8;
-			*dst++ = pixel >> 16;
-			*dst++ = pixel >> 24;
-		    }
+		case BPP24_LSB:			// 24 bit LSB
+                    CYCLE(
+		        for ( uint x=0; x<w; x++ ) {
+			    GET_PIXEL
+			    *dst++ = pixel;
+			    *dst++ = pixel >> 8;
+			    *dst++ = pixel >> 16;
+		        }
+                    )
 		    break;
-		default:
-		    qFatal("Logic error 2");
-		}
-	    }
-	}
-	xi->data = (char *)newbits;
+                case BPP32_16_8_0:
+                    CYCLE(
+                        memcpy( dst, p, w * 4 );
+                    )
+                    break;
+		case BPP32_MSB:			// 32 bit MSB
+                    CYCLE(
+		        for ( uint x=0; x<w; x++ ) {
+			    GET_PIXEL
+			    *dst++ = pixel >> 24;
+			    *dst++ = pixel >> 16;
+			    *dst++ = pixel >> 8;
+			    *dst++ = pixel;
+		        }
+                    )
+		    break;
+		case BPP32_LSB:			// 32 bit LSB
+                    CYCLE(
+		        for ( uint x=0; x<w; x++ ) {
+			    GET_PIXEL
+			    *dst++ = pixel;
+			    *dst++ = pixel >> 8;
+			    *dst++ = pixel >> 16;
+			    *dst++ = pixel >> 24;
+		        }
+                    )
+  		    break;
+  		default:
+  		    qFatal("Logic error 2");
+  	    }
+  	}
+  	xi->data = (char *)newbits;
     }
 
     if ( d == 8 && !trucol ) {			// 8 bit pixmap
@@ -1554,15 +1675,24 @@ bool QPixmap::convertFromImage( const QI
 
                 if (image.depth() == 32) {
                     const int *iptr = (const int *) image.bits();
-                    int max = w * h;
-                    while (max--)
-                        *aptr++ = *iptr++ >> 24; // squirt
+                    if( axi->bytes_per_line == (int)w ) {
+                        int max = w * h;
+                        while (max--)
+                            *aptr++ = *iptr++ >> 24; // squirt
+                    } else {
+                        for (uint i = 0; i < h; ++i ) {
+                            for (uint j = 0; j < w; ++j )
+                                *aptr++ = *iptr++ >> 24; // squirt
+                            aptr += ( axi->bytes_per_line - w );
+                        }
+                    }
                 } else if (image.depth() == 8) {
                     const QRgb * const rgb = image.colorTable();
                     for (uint y = 0; y < h; ++y) {
                         const uchar *iptr = image.scanLine(y);
                         for (uint x = 0; x < w; ++x)
                             *aptr++ = qAlpha(rgb[*iptr++]);
+                        aptr += ( axi->bytes_per_line - w );
                     }
                 }

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File 0007-qpixmap_constants.patch of Package qt3 (Revision 0624bf5c0bfafbb48983a6087d6723c7)

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