From 55162445db4c8ea46be671c2abed4ad4e77e1dcd Mon Sep 17 00:00:00 2001 From: Vincent Sanders Date: Sun, 31 Jan 2010 00:36:02 +0000 Subject: Add Windows frontend svn path=/trunk/netsurf/; revision=9940 --- windows/bitmap.c | 333 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 333 insertions(+) create mode 100644 windows/bitmap.c (limited to 'windows/bitmap.c') diff --git a/windows/bitmap.c b/windows/bitmap.c new file mode 100644 index 000000000..74c104963 --- /dev/null +++ b/windows/bitmap.c @@ -0,0 +1,333 @@ +/* + * Copyright 2008 Vincent Sanders + * Copyright 2009 Mark Benjamin + * + * This file is part of NetSurf, http://www.netsurf-browser.org/ + * + * NetSurf is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * NetSurf is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + */ + +#include +#include + +#include "assert.h" +#include "image/bitmap.h" +#include "windows/bitmap.h" + +#include "utils/log.h" + +#ifndef MIN +#define MIN(a,b) (((a) < (b)) ? (a) : (b)) +#endif + +#ifndef MAX +#define MAX(a,b) (((a) > (b)) ? (a) : (b)) +#endif + +/** + * Create a bitmap. + * + * \param width width of image in pixels + * \param height width of image in pixels + * \param state a flag word indicating the initial state + * \return an opaque struct bitmap, or NULL on memory exhaustion + */ + +void *bitmap_create(int width, int height, unsigned int state) +{ + struct bitmap *bitmap; + LOG(("width %d, height %d, state %u",width,height,state)); + bitmap = calloc(1 , sizeof(struct bitmap)); + if (bitmap) { + bitmap->pixdata = calloc(width * height, 4); + if (bitmap->pixdata != NULL) { + bitmap->width = width; + bitmap->height = height; + bitmap->opaque = false; + } else { + free(bitmap); + bitmap=NULL; + } + } + + LOG(("bitmap %p", bitmap)); + + return bitmap; +} + + +/** + * Return a pointer to the pixel data in a bitmap. + * + * \param bitmap a bitmap, as returned by bitmap_create() + * \return pointer to the pixel buffer + * + * The pixel data is packed as BITMAP_FORMAT, possibly with padding at the end + * of rows. The width of a row in bytes is given by bitmap_get_rowstride(). + */ + +unsigned char *bitmap_get_buffer(void *bitmap) +{ + struct bitmap *bm = bitmap; + if (bitmap == NULL) { + LOG(("NULL bitmap!")); + return NULL; + } + + return bm->pixdata; +} + + +/** + * Find the width of a pixel row in bytes. + * + * \param bitmap a bitmap, as returned by bitmap_create() + * \return width of a pixel row in the bitmap + */ + +size_t bitmap_get_rowstride(void *bitmap) +{ + struct bitmap *bm = bitmap; + + if (bitmap == NULL) { + LOG(("NULL bitmap!")); + return 0; + } + + return (bm->width) * 4; +} + + +/** + * Free a bitmap. + * + * \param bitmap a bitmap, as returned by bitmap_create() + */ + +void bitmap_destroy(void *bitmap) +{ + struct bitmap *bm = bitmap; + + if (bitmap == NULL) { + LOG(("NULL bitmap!")); + return; + } + + free(bm->pixdata); + free(bm); +} + + +/** + * Save a bitmap in the platform's native format. + * + * \param bitmap a bitmap, as returned by bitmap_create() + * \param path pathname for file + * \return true on success, false on error and error reported + */ + +bool bitmap_save(void *bitmap, const char *path, unsigned flags) +{ + return true; +} + + +/** + * The bitmap image has changed, so flush any persistant cache. + * + * \param bitmap a bitmap, as returned by bitmap_create() + */ +void bitmap_modified(void *bitmap) { +} + + +/** + * The bitmap image can be suspended. + * + * \param bitmap a bitmap, as returned by bitmap_create() + * \param private_word a private word to be returned later + * \param suspend the function to be called upon suspension + * \param resume the function to be called when resuming + */ +void bitmap_set_suspendable(void *bitmap, void *private_word, + void (*invalidate)(void *bitmap, void *private_word)) { +} + +/** + * Sets whether a bitmap should be plotted opaque + * + * \param bitmap a bitmap, as returned by bitmap_create() + * \param opaque whether the bitmap should be plotted opaque + */ +void bitmap_set_opaque(void *bitmap, bool opaque) +{ + struct bitmap *bm = bitmap; + + if (bitmap == NULL) { + LOG(("NULL bitmap!")); + return; + } + + LOG(("setting bitmap %p to %s", bm, opaque?"opaque":"transparent")); + bm->opaque = opaque; +} + + +/** + * Tests whether a bitmap has an opaque alpha channel + * + * \param bitmap a bitmap, as returned by bitmap_create() + * \return whether the bitmap is opaque + */ +bool bitmap_test_opaque(void *bitmap) +{ + int tst; + struct bitmap *bm = bitmap; + + if (bitmap == NULL) { + LOG(("NULL bitmap!")); + return false; + } + + tst = bm->width * bm->height; + + while (tst-- > 0) { + if (bm->pixdata[(tst << 2) + 3] != 0xff) { + LOG(("bitmap %p has transparency",bm)); + return false; + } + } + LOG(("bitmap %p is opaque", bm)); + return true; +} + + +/** + * Gets whether a bitmap should be plotted opaque + * + * \param bitmap a bitmap, as returned by bitmap_create() + */ +bool bitmap_get_opaque(void *bitmap) +{ + struct bitmap *bm = bitmap; + + if (bitmap == NULL) { + LOG(("NULL bitmap!")); + return false; + } + + return bm->opaque; +} + +int bitmap_get_width(void *bitmap) +{ + struct bitmap *bm = bitmap; + + if (bitmap == NULL) { + LOG(("NULL bitmap!")); + return 0; + } + + return(bm->width); +} + +int bitmap_get_height(void *bitmap) +{ + struct bitmap *bm = bitmap; + + if (bitmap == NULL) { + LOG(("NULL bitmap!")); + return 0; + } + + return(bm->height); +} + +size_t bitmap_get_bpp(void *bitmap) +{ + return 4; +} + +struct bitmap *bitmap_scale(struct bitmap *prescale, int width, int height) +{ + struct bitmap *ret = malloc(sizeof(struct bitmap)); + int i, ii, v, vv; + uint32_t *retpixdata, *inpixdata; /* 4 byte types for quicker + * transfer */ + if (ret == NULL) + return NULL; + retpixdata = malloc(width * height * 4); + if (retpixdata == NULL) { + free(ret); + return NULL; + } + inpixdata = (uint32_t *)prescale->pixdata; + ret->pixdata = (uint8_t *)retpixdata; + ret->height = height; + ret->width = width; + for (i = 0; i < height; i++) { + v = i * width; + vv = (int)((i * prescale->height) / height) * prescale->width; + for (ii = 0; ii < width; ii++) { + retpixdata[v + ii] = inpixdata[vv + (int) + ((ii * prescale->width) / width)]; + } + } + return ret; + +} + +struct bitmap *bitmap_pretile(struct bitmap *untiled, int width, int height, + bitmap_flags_t flags) +{ + struct bitmap *ret = malloc(sizeof(struct bitmap)); + if (ret == NULL) + return NULL; + int i, hrepeat, vrepeat, repeat; + vrepeat = ((flags & BITMAPF_REPEAT_Y) != 0) ? + ((height + untiled->height - 1) / untiled->height) : 1; + hrepeat = ((flags & BITMAPF_REPEAT_X) != 0) ? + ((width + untiled->width - 1) / untiled->width) : 1; + width = untiled->width * hrepeat; + height = untiled->height * vrepeat; + uint8_t *indata = untiled->pixdata; + uint8_t *newdata = malloc(4 * width * height); + if (newdata == NULL) { + free(ret); + return NULL; + } + ret->pixdata = newdata; + size_t stride = untiled->width * 4; + + /* horizontal tiling */ + for (i = 0; i < untiled->height; i++) { + for (repeat = 0; repeat < hrepeat; repeat ++) { + memcpy(newdata, indata, stride); + newdata += stride; + } + indata += stride; + } + + /* vertical tiling */ + stride = untiled->height * width * 4; + newdata = ret->pixdata + stride; + indata = ret->pixdata; + + for (repeat = 1; repeat < vrepeat; repeat++) { + memcpy(newdata, indata, stride); + newdata += stride; + } + ret->width = width; + ret->height = height; + return ret; +} -- cgit v1.2.3