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Diffstat (limited to 'amiga/bitmap.c')
-rw-r--r-- | amiga/bitmap.c | 164 |
1 files changed, 164 insertions, 0 deletions
diff --git a/amiga/bitmap.c b/amiga/bitmap.c new file mode 100644 index 000000000..4c270a170 --- /dev/null +++ b/amiga/bitmap.c @@ -0,0 +1,164 @@ +/* + * Copyright 2008 Chris Young <chris@unsatisfactorysoftware.co.uk> + * + * 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 <http://www.gnu.org/licenses/>. + */ + +#include "assert.h" +#include "image/bitmap.h" +#include "amiga/bitmap.h" +#include <proto/exec.h> + +/** + * 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 + */ + +struct bitmap *bitmap_create(int width, int height, unsigned int state) +{ + struct bitmap *bitmap; + + DebugPrintF("creating bitmap\n"); + + bitmap = AllocVec(sizeof(struct bitmap),MEMF_CLEAR); + if(bitmap) + { + bitmap->pixdata = AllocVec(width*height*4,MEMF_CLEAR); + bitmap->width = width; + bitmap->height = height; + } + 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(). + */ + +char *bitmap_get_buffer(struct bitmap *bitmap) +{ + return bitmap->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(struct bitmap *bitmap) +{ + return (bitmap->width)*4; +} + + +/** + * Free a bitmap. + * + * \param bitmap a bitmap, as returned by bitmap_create() + */ + +void bitmap_destroy(struct bitmap *bitmap) +{ + FreeVec(bitmap->pixdata); + FreeVec(bitmap); +} + + +/** + * 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(struct bitmap *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(struct bitmap *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(struct bitmap *bitmap, void *private_word, + void (*invalidate)(struct bitmap *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(struct bitmap *bitmap, bool opaque) +{ + assert(bitmap); +/* todo: set bitmap as 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(struct bitmap *bitmap) +{ + assert(bitmap); +/* todo: test if bitmap as opaque */ + return false; +} + + +/** + * Gets whether a bitmap should be plotted opaque + * + * \param bitmap a bitmap, as returned by bitmap_create() + */ +bool bitmap_get_opaque(struct bitmap *bitmap) +{ + assert(bitmap); +/* todo: get whether bitmap is opaque */ + return false; +} |