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/* $Header$ */ |
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|
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/* |
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* tkWinImage.c -- |
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* |
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* This file contains routines for manipulation full-color images. |
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* |
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* Copyright (c) 1995 Sun Microsystems, Inc. |
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* |
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* See the file "license.terms" for information on usage and redistribution |
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* of this file, and for a DISCLAIMER OF ALL WARRANTIES. |
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* |
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* RCS: @(#) $Id: tkwinimage.c,v 1.1.1.1 2001/06/13 05:13:34 dtashley Exp $ |
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*/ |
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|
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#include "tkWinInt.h" |
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|
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static int DestroyImage _ANSI_ARGS_((XImage* data)); |
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static unsigned long ImageGetPixel _ANSI_ARGS_((XImage *image, int x, int y)); |
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static int PutPixel _ANSI_ARGS_((XImage *image, int x, int y, |
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unsigned long pixel)); |
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|
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/* |
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*---------------------------------------------------------------------- |
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* |
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* DestroyImage -- |
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* |
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* This is a trivial wrapper around ckfree to make it possible to |
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* pass ckfree as a pointer. |
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* |
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* Results: |
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* None. |
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* |
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* Side effects: |
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* Deallocates the image. |
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* |
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*---------------------------------------------------------------------- |
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*/ |
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|
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static int |
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DestroyImage(imagePtr) |
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XImage *imagePtr; /* image to free */ |
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{ |
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if (imagePtr) { |
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if (imagePtr->data) { |
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ckfree((char*)imagePtr->data); |
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} |
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ckfree((char*)imagePtr); |
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} |
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return 0; |
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} |
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|
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/* |
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*---------------------------------------------------------------------- |
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* |
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* ImageGetPixel -- |
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* |
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* Get a single pixel from an image. |
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* |
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* Results: |
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* Returns the 32 bit pixel value. |
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* |
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* Side effects: |
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* None. |
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* |
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*---------------------------------------------------------------------- |
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*/ |
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|
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static unsigned long |
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ImageGetPixel(image, x, y) |
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XImage *image; |
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int x, y; |
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{ |
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unsigned long pixel = 0; |
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unsigned char *srcPtr = &(image->data[(y * image->bytes_per_line) |
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+ ((x * image->bits_per_pixel) / NBBY)]); |
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|
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switch (image->bits_per_pixel) { |
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case 32: |
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case 24: |
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pixel = RGB(srcPtr[2], srcPtr[1], srcPtr[0]); |
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break; |
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case 16: |
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pixel = RGB(((((WORD*)srcPtr)[0]) >> 7) & 0xf8, |
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((((WORD*)srcPtr)[0]) >> 2) & 0xf8, |
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((((WORD*)srcPtr)[0]) << 3) & 0xf8); |
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break; |
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case 8: |
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pixel = srcPtr[0]; |
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break; |
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case 4: |
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pixel = ((x%2) ? (*srcPtr) : ((*srcPtr) >> 4)) & 0x0f; |
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break; |
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case 1: |
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pixel = ((*srcPtr) & (0x80 >> (x%8))) ? 1 : 0; |
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break; |
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} |
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return pixel; |
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} |
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|
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/* |
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*---------------------------------------------------------------------- |
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* |
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* PutPixel -- |
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* |
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* Set a single pixel in an image. |
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* |
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* Results: |
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* None. |
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* |
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* Side effects: |
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* None. |
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* |
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*---------------------------------------------------------------------- |
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*/ |
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|
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static int |
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PutPixel(image, x, y, pixel) |
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XImage *image; |
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int x, y; |
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unsigned long pixel; |
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{ |
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unsigned char *destPtr = &(image->data[(y * image->bytes_per_line) |
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+ ((x * image->bits_per_pixel) / NBBY)]); |
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|
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switch (image->bits_per_pixel) { |
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case 32: |
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/* |
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* Pixel is DWORD: 0x00BBGGRR |
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*/ |
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|
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destPtr[3] = 0; |
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case 24: |
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/* |
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* Pixel is triplet: 0xBBGGRR. |
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*/ |
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|
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destPtr[0] = (unsigned char) GetBValue(pixel); |
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destPtr[1] = (unsigned char) GetGValue(pixel); |
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destPtr[2] = (unsigned char) GetRValue(pixel); |
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break; |
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case 16: |
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/* |
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* Pixel is WORD: 5-5-5 (R-G-B) |
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*/ |
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|
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(*(WORD*)destPtr) = |
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((GetRValue(pixel) & 0xf8) << 7) |
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| ((GetGValue(pixel) & 0xf8) <<2) |
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| ((GetBValue(pixel) & 0xf8) >> 3); |
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break; |
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case 8: |
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/* |
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* Pixel is 8-bit index into color table. |
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*/ |
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|
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(*destPtr) = (unsigned char) pixel; |
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break; |
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case 4: |
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/* |
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* Pixel is 4-bit index in MSBFirst order. |
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*/ |
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if (x%2) { |
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(*destPtr) = (unsigned char) (((*destPtr) & 0xf0) |
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| (pixel & 0x0f)); |
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} else { |
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(*destPtr) = (unsigned char) (((*destPtr) & 0x0f) |
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| ((pixel << 4) & 0xf0)); |
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} |
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break; |
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case 1: { |
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/* |
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* Pixel is bit in MSBFirst order. |
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*/ |
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|
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int mask = (0x80 >> (x%8)); |
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if (pixel) { |
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(*destPtr) |= mask; |
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} else { |
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(*destPtr) &= ~mask; |
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} |
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} |
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break; |
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} |
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return 0; |
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} |
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|
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/* |
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*---------------------------------------------------------------------- |
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* |
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* XCreateImage -- |
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* |
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* Allocates storage for a new XImage. |
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* |
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* Results: |
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* Returns a newly allocated XImage. |
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* |
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* Side effects: |
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* None. |
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* |
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*---------------------------------------------------------------------- |
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*/ |
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|
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XImage * |
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XCreateImage(display, visual, depth, format, offset, data, width, height, |
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bitmap_pad, bytes_per_line) |
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Display* display; |
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Visual* visual; |
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unsigned int depth; |
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int format; |
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int offset; |
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char* data; |
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unsigned int width; |
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unsigned int height; |
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int bitmap_pad; |
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int bytes_per_line; |
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{ |
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XImage* imagePtr = (XImage *) ckalloc(sizeof(XImage)); |
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imagePtr->width = width; |
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imagePtr->height = height; |
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imagePtr->xoffset = offset; |
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imagePtr->format = format; |
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imagePtr->data = data; |
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imagePtr->byte_order = LSBFirst; |
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imagePtr->bitmap_unit = 8; |
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imagePtr->bitmap_bit_order = MSBFirst; |
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imagePtr->bitmap_pad = bitmap_pad; |
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imagePtr->bits_per_pixel = depth; |
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imagePtr->depth = depth; |
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|
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/* |
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* Under Windows, bitmap_pad must be on an LONG data-type boundary. |
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*/ |
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|
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#define LONGBITS (sizeof(LONG) * 8) |
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|
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bitmap_pad = (bitmap_pad + LONGBITS - 1) / LONGBITS * LONGBITS; |
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|
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/* |
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* Round to the nearest bitmap_pad boundary. |
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*/ |
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|
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if (bytes_per_line) { |
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imagePtr->bytes_per_line = bytes_per_line; |
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} else { |
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imagePtr->bytes_per_line = (((depth * width) |
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+ (bitmap_pad - 1)) >> 3) & ~((bitmap_pad >> 3) - 1); |
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} |
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|
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imagePtr->red_mask = 0; |
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imagePtr->green_mask = 0; |
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imagePtr->blue_mask = 0; |
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|
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imagePtr->f.put_pixel = PutPixel; |
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imagePtr->f.get_pixel = ImageGetPixel; |
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imagePtr->f.destroy_image = DestroyImage; |
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imagePtr->f.create_image = NULL; |
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imagePtr->f.sub_image = NULL; |
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imagePtr->f.add_pixel = NULL; |
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|
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return imagePtr; |
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} |
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|
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/* |
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*---------------------------------------------------------------------- |
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* |
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* XGetImage -- |
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* |
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* This function copies data from a pixmap or window into an |
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* XImage. |
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* |
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* Results: |
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* Returns a newly allocated image containing the data from the |
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* given rectangle of the given drawable. |
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* |
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* Side effects: |
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* None. |
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* |
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*---------------------------------------------------------------------- |
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*/ |
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|
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XImage * |
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XGetImage(display, d, x, y, width, height, plane_mask, format) |
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Display* display; |
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Drawable d; |
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int x; |
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int y; |
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unsigned int width; |
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unsigned int height; |
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unsigned long plane_mask; |
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int format; |
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{ |
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TkWinDrawable *twdPtr = (TkWinDrawable *)d; |
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XImage *imagePtr; |
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HDC dc; |
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char infoBuf[sizeof(BITMAPINFO) + sizeof(RGBQUAD)]; |
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BITMAPINFO *infoPtr = (BITMAPINFO*)infoBuf; |
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|
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if ((twdPtr->type != TWD_BITMAP) || (twdPtr->bitmap.handle == NULL) |
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|| (format != XYPixmap) || (plane_mask != 1)) { |
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panic("XGetImage: not implemented"); |
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} |
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|
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|
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imagePtr = XCreateImage(display, NULL, 1, XYBitmap, 0, NULL, |
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width, height, 32, 0); |
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imagePtr->data = ckalloc(imagePtr->bytes_per_line * imagePtr->height); |
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|
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dc = GetDC(NULL); |
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|
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GetDIBits(dc, twdPtr->bitmap.handle, 0, height, NULL, |
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infoPtr, DIB_RGB_COLORS); |
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|
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infoPtr->bmiHeader.biSize = sizeof(BITMAPINFOHEADER); |
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infoPtr->bmiHeader.biWidth = width; |
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infoPtr->bmiHeader.biHeight = -(LONG)height; |
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infoPtr->bmiHeader.biPlanes = 1; |
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infoPtr->bmiHeader.biBitCount = 1; |
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infoPtr->bmiHeader.biCompression = BI_RGB; |
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infoPtr->bmiHeader.biCompression = 0; |
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infoPtr->bmiHeader.biXPelsPerMeter = 0; |
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infoPtr->bmiHeader.biYPelsPerMeter = 0; |
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infoPtr->bmiHeader.biClrUsed = 0; |
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infoPtr->bmiHeader.biClrImportant = 0; |
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|
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GetDIBits(dc, twdPtr->bitmap.handle, 0, height, imagePtr->data, |
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infoPtr, DIB_RGB_COLORS); |
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ReleaseDC(NULL, dc); |
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|
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return imagePtr; |
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} |
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|
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/* End of tkwinimage.c */ |
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