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294 lines
10 KiB
C
294 lines
10 KiB
C
/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All
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* Rights Reserved.
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*
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* Contributor(s):
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*/
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/*
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** All the wonderful code for dealing with images
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*/
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#define JMC_INIT_PSIMGCB_ID
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#include "xlate_i.h"
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#include "libimg.h" /* Image Library public API. */
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#include "il_util.h" /* Colormap/Colorspace API. */
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/* Create and initialize the Image Library JMC callback interface.
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Also create an IL_GroupContext for the current context. */
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XP_Bool
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psfe_init_image_callbacks(MWContext *cx)
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{
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IL_GroupContext *img_cx;
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PSIMGCB* img_cb;
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JMCException *exc = NULL;
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if (!cx->img_cx) {
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img_cb = PSIMGCBFactory_Create(&exc); /* JMC Module */
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if (exc) {
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JMC_DELETE_EXCEPTION(&exc); /* XXXM12N Should really return
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exception */
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return FALSE;
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}
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/* Create an Image Group Context. IL_NewGroupContext augments the
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reference count for the JMC callback interface. The opaque argument
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to IL_NewGroupContext is the Front End's display context, which will
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be passed back to all the Image Library's FE callbacks. */
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img_cx = IL_NewGroupContext((void*)cx, (IMGCBIF *)img_cb);
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/* Attach the IL_GroupContext to the FE's display context. */
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cx->img_cx = img_cx;
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}
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return TRUE;
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}
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/*****************************************************************************/
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/* Image Library callbacks */
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/*****************************************************************************/
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#define HOWMANY(x, r) (((x) + ((r) - 1)) / (r))
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#define ROUNDUP(x, r) (HOWMANY(x, r) * (r))
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JMC_PUBLIC_API(void)
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_PSIMGCB_init(struct PSIMGCB* self, JMCException* *exception)
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{
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/* Nothing to be done here. */
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}
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extern JMC_PUBLIC_API(void*)
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_PSIMGCB_getBackwardCompatibleInterface(struct PSIMGCB* self,
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const JMCInterfaceID* iid,
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JMCException* *exception)
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{
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return NULL; /* Nothing to be done here. */
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}
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/**************************** Pixmap creation ********************************/
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JMC_PUBLIC_API(void)
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_PSIMGCB_NewPixmap(PSIMGCB* img_cb, jint op, void *dpy_cx, jint width,
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jint height, IL_Pixmap *image, IL_Pixmap *mask)
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{
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uint8 img_depth, pixmap_depth;
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NI_PixmapHeader *img_header = &image->header;
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NI_PixmapHeader *mask_header = mask ? &mask->header : NULL;
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MWContext *context = (MWContext *)dpy_cx; /* XXXM12N This should be the
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FE's display context. */
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/* Determine the depth of the image. */
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pixmap_depth = context->color_space->pixmap_depth;
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/* Override the image colorspace with the display colorspace. This
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instructs the image library to decode to the display colorspace
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instead of decoding to the image's source colorspace. */
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IL_ReleaseColorSpace(img_header->color_space);
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img_header->color_space = context->color_space;
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IL_AddRefToColorSpace(img_header->color_space);
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/* Ask the image library to scale to the requested dimensions.
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Context-specific scaling, however, will be handled by the PSFE. */
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img_header->width = width;
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img_header->height = height;
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if (mask) {
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mask_header->width = width;
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mask_header->height = height;
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}
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/* Compute the number of bytes per scan line for the image and mask,
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and make sure it is quadlet aligned. */
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img_depth = img_header->color_space->pixmap_depth;
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XP_ASSERT(img_depth == pixmap_depth);
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img_header->widthBytes = (img_header->width * img_depth + 7) / 8;
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img_header->widthBytes = ROUNDUP(img_header->widthBytes, 4);
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if (mask) {
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mask_header->widthBytes = (mask_header->width + 7) / 8;
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mask_header->widthBytes = ROUNDUP(mask_header->widthBytes, 4);
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}
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/* Allocate memory for the image bits, and for the mask bits (if
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required.) */
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image->bits = calloc(img_header->widthBytes * img_header->height, 1);
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if (!image->bits)
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return;
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if (mask) {
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mask->bits = calloc(mask_header->widthBytes * mask_header->height, 1);
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if (!mask->bits) {
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free(image->bits);
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image->bits = NULL;
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return;
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}
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}
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}
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/**************************** Pixmap update **********************************/
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JMC_PUBLIC_API(void)
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_PSIMGCB_UpdatePixmap(PSIMGCB* img_cb, jint op, void* dpy_cx,
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IL_Pixmap* pixmap, jint x_offset, jint y_offset,
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jint width, jint height)
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{
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}
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/************************** Pixmap memory management *************************/
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JMC_PUBLIC_API(void)
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_PSIMGCB_ControlPixmapBits(PSIMGCB* img_cb, jint op, void* dpy_cx,
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IL_Pixmap* pixmap, IL_PixmapControl message)
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{
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}
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/**************************** Pixmap destruction *****************************/
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/* XXXM12N The dpy_cx argument is not used in DestroyPixmap and should be
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removed. */
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JMC_PUBLIC_API(void)
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_PSIMGCB_DestroyPixmap(PSIMGCB* img_cb, jint op, void* dpy_cx,
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IL_Pixmap* pixmap)
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{
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/* Free the pixmap's bits. */
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if (pixmap->bits) {
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free(pixmap->bits);
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pixmap->bits = NULL;
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}
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}
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/**************************** Pixmap display *********************************/
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JMC_PUBLIC_API(void)
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_PSIMGCB_DisplayPixmap(PSIMGCB* img_cb, jint op, void* dpy_cx,
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IL_Pixmap* image, IL_Pixmap* mask, jint x, jint y,
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jint x_offset, jint y_offset, jint width, jint height,
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jint req_w, jint req_h )
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{
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int32 img_x_offset, img_y_offset; /* Offset of image in drawable. */
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int32 rect_x_offset, rect_y_offset; /* Offset of update rect in
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drawable. */
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NI_PixmapHeader *img_header = &image->header;
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uint32 img_width = img_header->width; /* Image width. */
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uint32 img_height = img_header->height; /* Image height. */
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MWContext *context = (MWContext *)dpy_cx; /* XXX This should be the FE's
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display context. */
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XP_Bool tiling_required = FALSE;
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/* Check for zero display area. */
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if (width == 0 || height == 0)
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return;
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/* Perform context scaling. */
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x *= context->convertPixX;
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y *= context->convertPixY;
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x_offset *= context->convertPixX;
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y_offset *= context->convertPixY;
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width *= context->convertPixX;
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height *= context->convertPixY;
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img_width *= context->convertPixX;
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img_height *= context->convertPixY;
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/* Determine whether tiling is required. */
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if ((x_offset + width > img_width) || (y_offset + height > img_height))
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tiling_required = TRUE;
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/* Compute the offset into the drawable of the image origin. */
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img_x_offset = x; /* + fe_drawable->x_origin; */
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img_y_offset = y; /* + fe_drawable->y_origin; */
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/* Check whether the image is ready to be displayed. */
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if (!XP_CheckElementSpan(context, img_y_offset, img_height))
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return;
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/* Draw the image. */
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xl_colorimage(context, x, y, width, height, image, mask);
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}
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/**************************** Icon dimensions ********************************/
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JMC_PUBLIC_API(void)
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_PSIMGCB_GetIconDimensions(PSIMGCB* img_cb, jint op, void* dpy_cx, int* width,
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int* height, jint icon_number)
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{
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/* Call the screen FE to get the icon dimensions in pixels. */
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FE_GetPSIconDimensions(icon_number, width, height);
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}
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/**************************** Icon display ***********************************/
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JMC_PUBLIC_API(void)
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_PSIMGCB_DisplayIcon(PSIMGCB* img_cb, jint op, void* dpy_cx, jint x, jint y,
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jint icon_number)
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{
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int width; /* Width of the icon in context scaled coordinates. */
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int height; /* Height of the icon in context scaled coordinates. */
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int img_depth; /* Depth of the image. */
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MWContext *context = (MWContext *)dpy_cx;
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IL_Pixmap image; /* Image pixmap. */
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NI_PixmapHeader *img_header = &image.header;
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/* Call the screen FE to get the icon dimensions in pixels. */
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FE_GetPSIconDimensions(icon_number, &width, &height);
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img_header->width = (int32)width;
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img_header->height = (int32)height;
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/* Apply context scaling to the dimensions. */
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width *= context->convertPixX;
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height *= context->convertPixY;
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/* Check whether we are ready to display the icon. */
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if (!XP_CheckElementSpan(context, y, height))
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return;
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/* Don't attempt to display the icon if either dimension is zero. */
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if (!width || !height)
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return;
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/* Get ourselves a colorspace. */
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img_header->color_space = context->color_space;
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IL_AddRefToColorSpace(img_header->color_space);
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/* Allocate bits for the icon. We don't cache icons created for the
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purpose of printing. */
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img_depth = img_header->color_space->pixmap_depth;
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img_header->widthBytes = (img_header->width * img_depth + 7) / 8;
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img_header->widthBytes = ROUNDUP(img_header->widthBytes, 4);
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/* Allocate memory for the image bits. */
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image.bits = calloc(img_header->widthBytes * img_header->height, 1);
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if (!image.bits) {
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IL_ReleaseColorSpace(img_header->color_space);
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return;
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}
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/* Get the icon data from the screen FE and draw the icon. */
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if (FE_GetPSIconData(icon_number, &image, NULL))
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xl_colorimage(context, x, y, width, height, &image, NULL);
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/* Clean up. */
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free(image.bits);
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IL_ReleaseColorSpace(img_header->color_space);
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}
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/*****************************************************************************/
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/* End of Image Library callbacks */
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/*****************************************************************************/
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