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#ifndef __NR_PIXBLOCK_H__
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#define __NR_PIXBLOCK_H__
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* \brief Pixel block structure. Used for low-level rendering.
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* (C) 1999-2002 Lauris Kaplinski <lauris@kaplinski.com>
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* (C) 2005 Ralf Stephan <ralf@ark.in-berlin.de> (some cleanup)
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* This code is in the Public Domain.
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#include <libnr/nr-rect-l.h>
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#include <libnr/nr-forward.h>
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/// Size indicator. Hardcoded to max. 3 bits.
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NR_PIXBLOCK_SIZE_TINY, ///< Fits in (unsigned char *)
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NR_PIXBLOCK_SIZE_4K, ///< Pixelstore
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NR_PIXBLOCK_SIZE_16K, ///< Pixelstore
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NR_PIXBLOCK_SIZE_64K, ///< Pixelstore
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NR_PIXBLOCK_SIZE_256K, ///< Pixelstore
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NR_PIXBLOCK_SIZE_1M, ///< Pixelstore
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NR_PIXBLOCK_SIZE_BIG, ///< Normally allocated
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NR_PIXBLOCK_SIZE_STATIC ///< Externally managed
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/// Mode indicator. Hardcoded to max. 2 bits.
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NR_PIXBLOCK_MODE_A8, ///< Grayscale
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NR_PIXBLOCK_MODE_R8G8B8, ///< 8 bit RGB
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NR_PIXBLOCK_MODE_R8G8B8A8N, ///< Normal 8 bit RGBA
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NR_PIXBLOCK_MODE_R8G8B8A8P ///< Premultiplied 8 bit RGBA
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/// The pixel block struct.
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NR_PIXBLOCK_SIZE size : 3; ///< Size indicator
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NR_PIXBLOCK_MODE mode : 2; ///< Mode indicator
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bool empty : 1; ///< Empty flag
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unsigned int rs; ///< Size of line in bytes
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unsigned char *px; ///< Pointer to buffer
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unsigned char p[sizeof (unsigned char *)]; ///< Tiny buffer
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/// Returns number of bytes per pixel (1, 3, or 4).
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NR_PIXBLOCK_BPP (NRPixBlock *pb)
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return ((pb->mode == NR_PIXBLOCK_MODE_A8) ? 1 :
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(pb->mode == NR_PIXBLOCK_MODE_R8G8B8) ? 3 : 4);
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/// Returns pointer to pixel data.
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NR_PIXBLOCK_PX (NRPixBlock *pb)
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return ((pb->size == NR_PIXBLOCK_SIZE_TINY) ?
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pb->data.p : pb->data.px);
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inline unsigned char const*
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NR_PIXBLOCK_PX (NRPixBlock const *pb)
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return ((pb->size == NR_PIXBLOCK_SIZE_TINY) ?
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pb->data.p : pb->data.px);
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void nr_pixblock_setup (NRPixBlock *pb, NR_PIXBLOCK_MODE mode, int x0, int y0, int x1, int y1, bool clear);
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void nr_pixblock_setup_fast (NRPixBlock *pb, NR_PIXBLOCK_MODE mode, int x0, int y0, int x1, int y1, bool clear);
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void nr_pixblock_setup_extern (NRPixBlock *pb, NR_PIXBLOCK_MODE mode, int x0, int y0, int x1, int y1, unsigned char *px, int rs, bool empty, bool clear);
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void nr_pixblock_release (NRPixBlock *pb);
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NRPixBlock *nr_pixblock_new (NR_PIXBLOCK_MODE mode, int x0, int y0, int x1, int y1, bool clear);
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NRPixBlock *nr_pixblock_new_fast (NR_PIXBLOCK_MODE mode, int x0, int y0, int x1, int y1, bool clear);
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NRPixBlock *nr_pixblock_free (NRPixBlock *pb);
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unsigned char *nr_pixelstore_4K_new (bool clear, unsigned char val);
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void nr_pixelstore_4K_free (unsigned char *px);
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unsigned char *nr_pixelstore_16K_new (bool clear, unsigned char val);
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void nr_pixelstore_16K_free (unsigned char *px);
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unsigned char *nr_pixelstore_64K_new (bool clear, unsigned char val);
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void nr_pixelstore_64K_free (unsigned char *px);
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unsigned char *nr_pixelstore_256K_new (bool clear, unsigned char val);
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void nr_pixelstore_256K_free (unsigned char *px);
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unsigned char *nr_pixelstore_1M_new (bool clear, unsigned char val);
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void nr_pixelstore_1M_free (unsigned char *px);
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c-file-style:"stroustrup"
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c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
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// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :
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src/libnr/nr-pixblock.h
