52 lines
1.6 KiB
C
52 lines
1.6 KiB
C
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/*
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* texture.h : header for device-independent texture caching routines
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*/
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/* Sentinel this one just in case */
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#ifndef _DAVES_TEXTURE_H_
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#define _DAVES_TEXTURE_H_
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#include <brender.h>
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/* Definition for callback function called when the cache frees a texture
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* so the driver can free it as well */
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typedef br_boolean (texture_freed_cbfn)(struct render_buffer *texture);
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/*
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* Block structure for card memory malloc
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*
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* Blocks are maintained in order of card memory mapping, to speed up
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* and simplify freeing routines.
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*/
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typedef struct memory_block_tag memory_block;
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struct memory_block_tag {
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br_int_32 card_mapping; // Where this maps in card memory; an int so -1 can be returned
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br_uint_32 size;
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struct render_buffer *texture; // BRender's definition of the texture
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br_int_16 this_frame; // How many times accessed this frame
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br_int_16 last_frame; // Same for last frame
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memory_block * next; // Next block on list
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};
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/* Start up texture cache */
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br_boolean TextureCacheInit(br_int_32 base_mem_offset, br_uint_32 size,
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texture_freed_cbfn *tcallback);
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/* Close it down */
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void TextureCacheDeinit(br_boolean call_callback);
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/* Perform per-frame processing - update internal statistics */
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void TextureCacheFrameEnd(void);
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/* Request a texture; returns offset of texture on card */
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br_int_32 TextureCacheRequest(struct render_buffer *texture, br_uint_32 size);
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/* Free a single just-allocated texture */
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void TextureCacheRequestFree(struct render_buffer *texture);
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/* Clear an entry out of the cache */
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void TextureCacheClearEntry(struct render_buffer *texture);
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#endif
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