src/parsec/disk-image/parsec/parsec-benchmark/pkgs/libs/mesa/src/src/mesa/drivers/dri/mga/mgacontext.h - public/gem5-resources - Git at Google

 /* $XFree86: xc/lib/GL/mesa/src/drv/mga/mgacontext.h,v 1.7 2002/12/16 16:18:52 dawes Exp $*/
 /*
  * Copyright 2000-2001 VA Linux Systems, Inc.
  * All Rights Reserved.
  *
  * Permission is hereby granted, free of charge, to any person obtaining a
  * copy of this software and associated documentation files (the "Software"),
  * to deal in the Software without restriction, including without limitation
  * on the rights to use, copy, modify, merge, publish, distribute, sub
  * license, and/or sell copies of the Software, and to permit persons to whom
  * the Software is furnished to do so, subject to the following conditions:
  *
  * The above copyright notice and this permission notice (including the next
  * paragraph) shall be included in all copies or substantial portions of the
  * Software.
  *
  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.  IN NO EVENT SHALL
  * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  * OTHER DEALINGS IN THE SOFTWARE.
  *
  * Authors:
  *    Keith Whitwell <keith@tungstengraphics.com>
  */

 #ifndef MGALIB_INC
 #define MGALIB_INC

 #include <stdint.h>
 #include "drm.h"
 #include "mga_drm.h"
 #include "dri_util.h"
 #include "mtypes.h"
 #include "xf86drm.h"
 #include "mm.h"
 #include "colormac.h"
 #include "texmem.h"
 #include "macros.h"
 #include "xmlconfig.h"

 #define MGA_SET_FIELD(reg,mask,val)  reg = ((reg) & (mask)) | ((val) & ~(mask))
 #define MGA_FIELD(field,val) (((val) << (field ## _SHIFT)) & ~(field ## _MASK))
 #define MGA_GET_FIELD(field, val) ((val & ~(field ## _MASK)) >> (field ## _SHIFT))

 #define MGA_IS_G200(mmesa) (mmesa->mgaScreen->chipset == MGA_CARD_TYPE_G200)
 #define MGA_IS_G400(mmesa) (mmesa->mgaScreen->chipset == MGA_CARD_TYPE_G400)


 /* SoftwareFallback
  *    - texture env GL_BLEND -- can be fixed
  *    - 1D and 3D textures
  *    - incomplete textures
  *    - GL_DEPTH_FUNC == GL_NEVER not in h/w
  */
 #define MGA_FALLBACK_TEXTURE        0x1
 #define MGA_FALLBACK_DRAW_BUFFER    0x2
 #define MGA_FALLBACK_READ_BUFFER    0x4
 #define MGA_FALLBACK_BLEND          0x8
 #define MGA_FALLBACK_RENDERMODE     0x10
 #define MGA_FALLBACK_STENCIL        0x20
 #define MGA_FALLBACK_DEPTH          0x40
 #define MGA_FALLBACK_BORDER_MODE    0x80
 #define MGA_FALLBACK_DISABLE        0x100


 /* Use the templated vertex formats:
  */
 #define TAG(x) mga##x
 #include "tnl_dd/t_dd_vertex.h"
 #undef TAG

 typedef struct mga_context_t mgaContext;
 typedef struct mga_context_t *mgaContextPtr;

 typedef void (*mga_tri_func)( mgaContextPtr, mgaVertex *, mgaVertex *,
 			       mgaVertex * );
 typedef void (*mga_line_func)( mgaContextPtr, mgaVertex *, mgaVertex * );
 typedef void (*mga_point_func)( mgaContextPtr, mgaVertex * );


 /* Texture environment color
  */
 #define RGB_ZERO(c)   (((c) & 0xffffff) == 0x000000)
 #define RGB_ONE(c)    (((c) & 0xffffff) == 0xffffff)
 #define ALPHA_ZERO(c) (((c) >> 24) == 0x00)
 #define ALPHA_ONE(c)  (((c) >> 24) == 0xff)
 #define RGBA_EQUAL(c) ((c) == PACK_COLOR_8888( (c) & 0xff, (c) & 0xff, \
                                                (c) & 0xff, (c) & 0xff ))

 struct mga_texture_object_s;
 struct mga_screen_private_s;

 #define G200_TEX_MAXLEVELS 5
 #define G400_TEX_MAXLEVELS 11

 typedef struct mga_texture_object_s
 {
    driTextureObject   base;

    /* The G200 only has the ability to use 5 mipmap levels (including the
     * base level).  The G400 does not have this restriction, but it still
     * only has 5 offset pointers in the hardware.  The trick on the G400 is
     * upto the first 4 offset pointers point to mipmap levels.  The last
     * offset pointer tells how large the preceeding mipmap is.  This value is
     * then used to determine where the remaining mipmaps are.
     *
     * For example, if the first offsets[0] through offsets[2] are used as
     * pointers, then offset[3] will be the size of the mipmap pointed to by
     * offsets[2].  So mipmap level 3 will be at (offsets[2]+offsets[3]).  For
     * each successive mipmap level, offsets[3] is divided by 4 and added to
     * the previous address.  So mipmap level 4 will be at
     * (offsets[2]+offsets[3]+(offsets[3] / 4)).
     *
     * The last pointer is selected by setting TO_texorgoffsetsel in its
     * pointer.  In the previous example, offset[2] would have
     * TO_texorgoffsetsel or'ed in before writing it to the hardware.
     *
     * In the current driver all of the mipmaps are packed together linearly
     * with mipmap level 0.  Therefore offsets[0] points to the base of the
     * texture (and has TO_texorgoffsetsel or'ed in), and offsets[1] is the
     * size of the base texture.
     *
     * There is a possible optimization available here.  At times the driver
     * may not be able to allocate a single block of memory for the complete
     * texture without ejecting some other textures from memory.  It may be
     * possible to put some of the lower mipmap levels (i.e., the larger
     * mipmaps) in memory separate from the higher levels.
     *
     * The implementation should be fairly obvious, but getting "right" would
     * likely be non-trivial.  A first allocation for the entire texture would
     * be attempted with a flag that says "don't eject other textures."  If
     * that failed, an additional allocation would be attmpted for just the
     * base map.  The process would repeat with the block of lower maps.  The
     * tricky parts would be in detecting when some of the levels had been
     * ejected from texture memory by other textures and preventing the
     * 4th allocation (for all the smallest mipmap levels) from kicking out
     * any of the first three.
     *
     * This array holds G400_TEX_MAXLEVELS pointers to remove an if-statement
     * in a loop in mgaSetTexImages.  Values past G200_TEX_MAXLEVELS are not
     * used.
     */
    GLuint             offsets[G400_TEX_MAXLEVELS];

    int                texelBytes;
    GLuint             age;

    drm_mga_texture_regs_t setup;

    /* If one texture dimension wraps with GL_CLAMP and the other with
     * GL_CLAMP_TO_EDGE, we have to fallback to software.  We would also have
     * to fallback for GL_CLAMP_TO_BORDER.
     */
    GLboolean          border_fallback;
    /* Depending on multitxturing and environment color
     * GL_BLEND may have to be a software fallback.
     */
    GLboolean texenv_fallback;
 } mgaTextureObject_t;

 struct mga_hw_state {
    GLuint   specen;
    GLuint   cull;
    GLuint   cull_dualtex;
    GLuint   stencil;
    GLuint   stencilctl;
    GLuint   stencil_enable;
    GLuint   zmode;
    GLuint   rop;
    GLuint   alpha_func;
    GLuint   alpha_func_enable;
    GLuint   blend_func;
    GLuint   blend_func_enable;
    GLuint   alpha_sel;
 };

 struct mga_context_t {

    GLcontext *glCtx;
    unsigned int lastStamp;		/* fullscreen breaks dpriv->laststamp,
 					 * need to shadow it here. */

    /* Hardware state management
     */
    struct mga_hw_state hw;

    /* Bookkeeping for texturing
     */
    unsigned           nr_heaps;
    driTexHeap       * texture_heaps[ MGA_NR_TEX_HEAPS ];
    driTextureObject   swapped;

    struct mga_texture_object_s *CurrentTexObj[2];


    /* Map GL texture units onto hardware.
     */
    GLuint tmu_source[2];

    int texture_depth;

    /* Manage fallbacks
     */
    GLuint Fallback;

    /* Texture environment color.
     */
    unsigned int envcolor[2];
    GLboolean fcol_used;
    GLboolean force_dualtex;

    /* Rasterization state
     */
    GLuint SetupNewInputs;
    GLuint SetupIndex;
    GLuint RenderIndex;

    GLuint hw_primitive;
    GLenum raster_primitive;
    GLenum render_primitive;

    GLubyte *verts;
    GLint vertex_stride_shift;
    GLuint vertex_format;
    GLuint vertex_size;

    /* Fallback rasterization functions
     */
    mga_point_func draw_point;
    mga_line_func draw_line;
    mga_tri_func draw_tri;


    /* Manage driver and hardware state
     */
    GLuint        NewGLState;
    GLuint        dirty;

    drm_mga_context_regs_t setup;

    GLuint        ClearColor;
    GLuint        ClearDepth;
    GLuint        poly_stipple;
    GLfloat       depth_scale;

    GLuint        depth_clear_mask;
    GLuint        stencil_clear_mask;
    GLuint        hw_stencil;
    GLuint        haveHwStipple;
    GLfloat       hw_viewport[16];

    /* Dma buffers
     */
    drmBufPtr  vertex_dma_buffer;
    drmBufPtr  iload_buffer;

    int64_t swap_ust;
    int64_t swap_missed_ust;

    GLuint swap_count;
    GLuint swap_missed_count;

    uint32_t last_frame_fence;

    /* Drawable, cliprect and scissor information
     */
    int dirty_cliprects;		/* which sets of cliprects are uptodate? */
    int draw_buffer;		/* which buffer are we rendering to */
    unsigned int drawOffset;		/* draw buffer address in  space */
    int readOffset;
    int drawX, drawY;		/* origin of drawable in draw buffer */
    int lastX, lastY;		/* detect DSTORG bug */
    GLuint numClipRects;		/* cliprects for the draw buffer */
    drm_clip_rect_t *pClipRects;
    drm_clip_rect_t draw_rect;
    drm_clip_rect_t scissor_rect;
    int scissor;

    drm_clip_rect_t tmp_boxes[2][MGA_NR_SAREA_CLIPRECTS];


    /* Texture aging and DMA based aging.
     */
    unsigned int texAge[MGA_NR_TEX_HEAPS];/* texture LRU age  */
    unsigned int dirtyAge;		/* buffer age for synchronization */

    GLuint primary_offset;

    /* Mirrors of some DRI state.
     */
    drm_context_t hHWContext;
    drm_hw_lock_t *driHwLock;
    int driFd;
    __DRIdrawablePrivate *driDrawable;
    __DRIdrawablePrivate *driReadable;

    __DRIscreenPrivate *driScreen;
    struct mga_screen_private_s *mgaScreen;
    drm_mga_sarea_t *sarea;

    /* Configuration cache
     */
    driOptionCache optionCache;
 };

 #define MGA_CONTEXT(ctx) ((mgaContextPtr)(ctx->DriverCtx))


 /* ================================================================
  * Debugging:
  */
 #define DO_DEBUG		1

 #if DO_DEBUG
 extern int MGA_DEBUG;
 #else
 #define MGA_DEBUG		0
 #endif

 #define DEBUG_VERBOSE_MSG	0x01
 #define DEBUG_VERBOSE_DRI	0x02
 #define DEBUG_VERBOSE_IOCTL	0x04
 #define DEBUG_VERBOSE_TEXTURE   0x08
 #define DEBUG_VERBOSE_FALLBACK	0x10

 static INLINE GLuint mgaPackColor(GLuint cpp,
                                   GLubyte r, GLubyte g,
                                   GLubyte b, GLubyte a)
 {
    switch (cpp) {
    case 2:
       return PACK_COLOR_565( r, g, b );
    case 4:
       return PACK_COLOR_8888( a, r, g, b );
    default:
       return 0;
    }
 }


 /*
  * Subpixel offsets for window coordinates:
  */
 #define SUBPIXEL_X (-0.5F)
 #define SUBPIXEL_Y (-0.5F + 0.125)


 #define MGA_WA_TRIANGLES     0x18000000
 #define MGA_WA_TRISTRIP_T0   0x02010200
 #define MGA_WA_TRIFAN_T0     0x01000408
 #define MGA_WA_TRISTRIP_T0T1 0x02010400
 #define MGA_WA_TRIFAN_T0T1   0x01000810

 #endif
	/* $XFree86: xc/lib/GL/mesa/src/drv/mga/mgacontext.h,v 1.7 2002/12/16 16:18:52 dawes Exp $*/
	/*
	* Copyright 2000-2001 VA Linux Systems, Inc.
	* All Rights Reserved.
	*
	* Permission is hereby granted, free of charge, to any person obtaining a
	* copy of this software and associated documentation files (the "Software"),
	* to deal in the Software without restriction, including without limitation
	* on the rights to use, copy, modify, merge, publish, distribute, sub
	* license, and/or sell copies of the Software, and to permit persons to whom
	* the Software is furnished to do so, subject to the following conditions:
	*
	* The above copyright notice and this permission notice (including the next
	* paragraph) shall be included in all copies or substantial portions of the
	* Software.
	*
	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
	* VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
	* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
	* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
	* OTHER DEALINGS IN THE SOFTWARE.
	*
	* Authors:
	* Keith Whitwell <keith@tungstengraphics.com>
	*/

	#ifndef MGALIB_INC
	#define MGALIB_INC

	#include <stdint.h>
	#include "drm.h"
	#include "mga_drm.h"
	#include "dri_util.h"
	#include "mtypes.h"
	#include "xf86drm.h"
	#include "mm.h"
	#include "colormac.h"
	#include "texmem.h"
	#include "macros.h"
	#include "xmlconfig.h"

	#define MGA_SET_FIELD(reg,mask,val) reg = ((reg) & (mask)) \| ((val) & ~(mask))
	#define MGA_FIELD(field,val) (((val) << (field ## _SHIFT)) & ~(field ## _MASK))
	#define MGA_GET_FIELD(field, val) ((val & ~(field ## _MASK)) >> (field ## _SHIFT))

	#define MGA_IS_G200(mmesa) (mmesa->mgaScreen->chipset == MGA_CARD_TYPE_G200)
	#define MGA_IS_G400(mmesa) (mmesa->mgaScreen->chipset == MGA_CARD_TYPE_G400)


	/* SoftwareFallback
	* - texture env GL_BLEND -- can be fixed
	* - 1D and 3D textures
	* - incomplete textures
	* - GL_DEPTH_FUNC == GL_NEVER not in h/w
	*/
	#define MGA_FALLBACK_TEXTURE 0x1
	#define MGA_FALLBACK_DRAW_BUFFER 0x2
	#define MGA_FALLBACK_READ_BUFFER 0x4
	#define MGA_FALLBACK_BLEND 0x8
	#define MGA_FALLBACK_RENDERMODE 0x10
	#define MGA_FALLBACK_STENCIL 0x20
	#define MGA_FALLBACK_DEPTH 0x40
	#define MGA_FALLBACK_BORDER_MODE 0x80
	#define MGA_FALLBACK_DISABLE 0x100


	/* Use the templated vertex formats:
	*/
	#define TAG(x) mga##x
	#include "tnl_dd/t_dd_vertex.h"
	#undef TAG

	typedef struct mga_context_t mgaContext;
	typedef struct mga_context_t *mgaContextPtr;

	typedef void (mga_tri_func)( mgaContextPtr, mgaVertex , mgaVertex *,
	mgaVertex * );
	typedef void (mga_line_func)( mgaContextPtr, mgaVertex , mgaVertex * );
	typedef void (mga_point_func)( mgaContextPtr, mgaVertex );



	/* Texture environment color
	*/
	#define RGB_ZERO(c) (((c) & 0xffffff) == 0x000000)
	#define RGB_ONE(c) (((c) & 0xffffff) == 0xffffff)
	#define ALPHA_ZERO(c) (((c) >> 24) == 0x00)
	#define ALPHA_ONE(c) (((c) >> 24) == 0xff)
	#define RGBA_EQUAL(c) ((c) == PACK_COLOR_8888( (c) & 0xff, (c) & 0xff, \
	(c) & 0xff, (c) & 0xff ))

	struct mga_texture_object_s;
	struct mga_screen_private_s;

	#define G200_TEX_MAXLEVELS 5
	#define G400_TEX_MAXLEVELS 11

	typedef struct mga_texture_object_s
	{
	driTextureObject base;

	/* The G200 only has the ability to use 5 mipmap levels (including the
	* base level). The G400 does not have this restriction, but it still
	* only has 5 offset pointers in the hardware. The trick on the G400 is
	* upto the first 4 offset pointers point to mipmap levels. The last
	* offset pointer tells how large the preceeding mipmap is. This value is
	* then used to determine where the remaining mipmaps are.
	*
	* For example, if the first offsets[0] through offsets[2] are used as
	* pointers, then offset[3] will be the size of the mipmap pointed to by
	* offsets[2]. So mipmap level 3 will be at (offsets[2]+offsets[3]). For
	* each successive mipmap level, offsets[3] is divided by 4 and added to
	* the previous address. So mipmap level 4 will be at
	* (offsets[2]+offsets[3]+(offsets[3] / 4)).
	*
	* The last pointer is selected by setting TO_texorgoffsetsel in its
	* pointer. In the previous example, offset[2] would have
	* TO_texorgoffsetsel or'ed in before writing it to the hardware.
	*
	* In the current driver all of the mipmaps are packed together linearly
	* with mipmap level 0. Therefore offsets[0] points to the base of the
	* texture (and has TO_texorgoffsetsel or'ed in), and offsets[1] is the
	* size of the base texture.
	*
	* There is a possible optimization available here. At times the driver
	* may not be able to allocate a single block of memory for the complete
	* texture without ejecting some other textures from memory. It may be
	* possible to put some of the lower mipmap levels (i.e., the larger
	* mipmaps) in memory separate from the higher levels.
	*
	* The implementation should be fairly obvious, but getting "right" would
	* likely be non-trivial. A first allocation for the entire texture would
	* be attempted with a flag that says "don't eject other textures." If
	* that failed, an additional allocation would be attmpted for just the
	* base map. The process would repeat with the block of lower maps. The
	* tricky parts would be in detecting when some of the levels had been
	* ejected from texture memory by other textures and preventing the
	* 4th allocation (for all the smallest mipmap levels) from kicking out
	* any of the first three.
	*
	* This array holds G400_TEX_MAXLEVELS pointers to remove an if-statement
	* in a loop in mgaSetTexImages. Values past G200_TEX_MAXLEVELS are not
	* used.
	*/
	GLuint offsets[G400_TEX_MAXLEVELS];

	int texelBytes;
	GLuint age;

	drm_mga_texture_regs_t setup;

	/* If one texture dimension wraps with GL_CLAMP and the other with
	* GL_CLAMP_TO_EDGE, we have to fallback to software. We would also have
	* to fallback for GL_CLAMP_TO_BORDER.
	*/
	GLboolean border_fallback;
	/* Depending on multitxturing and environment color
	* GL_BLEND may have to be a software fallback.
	*/
	GLboolean texenv_fallback;
	} mgaTextureObject_t;

	struct mga_hw_state {
	GLuint specen;
	GLuint cull;
	GLuint cull_dualtex;
	GLuint stencil;
	GLuint stencilctl;
	GLuint stencil_enable;
	GLuint zmode;
	GLuint rop;
	GLuint alpha_func;
	GLuint alpha_func_enable;
	GLuint blend_func;
	GLuint blend_func_enable;
	GLuint alpha_sel;
	};

	struct mga_context_t {

	GLcontext *glCtx;
	unsigned int lastStamp; /* fullscreen breaks dpriv->laststamp,
	* need to shadow it here. */

	/* Hardware state management
	*/
	struct mga_hw_state hw;

	/* Bookkeeping for texturing
	*/
	unsigned nr_heaps;
	driTexHeap * texture_heaps[ MGA_NR_TEX_HEAPS ];
	driTextureObject swapped;

	struct mga_texture_object_s *CurrentTexObj[2];


	/* Map GL texture units onto hardware.
	*/
	GLuint tmu_source[2];

	int texture_depth;

	/* Manage fallbacks
	*/
	GLuint Fallback;

	/* Texture environment color.
	*/
	unsigned int envcolor[2];
	GLboolean fcol_used;
	GLboolean force_dualtex;

	/* Rasterization state
	*/
	GLuint SetupNewInputs;
	GLuint SetupIndex;
	GLuint RenderIndex;

	GLuint hw_primitive;
	GLenum raster_primitive;
	GLenum render_primitive;

	GLubyte *verts;
	GLint vertex_stride_shift;
	GLuint vertex_format;
	GLuint vertex_size;

	/* Fallback rasterization functions
	*/
	mga_point_func draw_point;
	mga_line_func draw_line;
	mga_tri_func draw_tri;


	/* Manage driver and hardware state
	*/
	GLuint NewGLState;
	GLuint dirty;

	drm_mga_context_regs_t setup;

	GLuint ClearColor;
	GLuint ClearDepth;
	GLuint poly_stipple;
	GLfloat depth_scale;

	GLuint depth_clear_mask;
	GLuint stencil_clear_mask;
	GLuint hw_stencil;
	GLuint haveHwStipple;
	GLfloat hw_viewport[16];

	/* Dma buffers
	*/
	drmBufPtr vertex_dma_buffer;
	drmBufPtr iload_buffer;

	int64_t swap_ust;
	int64_t swap_missed_ust;

	GLuint swap_count;
	GLuint swap_missed_count;

	uint32_t last_frame_fence;

	/* Drawable, cliprect and scissor information
	*/
	int dirty_cliprects; /* which sets of cliprects are uptodate? */
	int draw_buffer; /* which buffer are we rendering to */
	unsigned int drawOffset; /* draw buffer address in space */
	int readOffset;
	int drawX, drawY; /* origin of drawable in draw buffer */
	int lastX, lastY; /* detect DSTORG bug */
	GLuint numClipRects; /* cliprects for the draw buffer */
	drm_clip_rect_t *pClipRects;
	drm_clip_rect_t draw_rect;
	drm_clip_rect_t scissor_rect;
	int scissor;

	drm_clip_rect_t tmp_boxes[2][MGA_NR_SAREA_CLIPRECTS];


	/* Texture aging and DMA based aging.
	*/
	unsigned int texAge[MGA_NR_TEX_HEAPS];/* texture LRU age */
	unsigned int dirtyAge; /* buffer age for synchronization */

	GLuint primary_offset;

	/* Mirrors of some DRI state.
	*/
	drm_context_t hHWContext;
	drm_hw_lock_t *driHwLock;
	int driFd;
	__DRIdrawablePrivate *driDrawable;
	__DRIdrawablePrivate *driReadable;

	__DRIscreenPrivate *driScreen;
	struct mga_screen_private_s *mgaScreen;
	drm_mga_sarea_t *sarea;

	/* Configuration cache
	*/
	driOptionCache optionCache;
	};

	#define MGA_CONTEXT(ctx) ((mgaContextPtr)(ctx->DriverCtx))




	/* ================================================================
	* Debugging:
	*/
	#define DO_DEBUG 1

	#if DO_DEBUG
	extern int MGA_DEBUG;
	#else
	#define MGA_DEBUG 0
	#endif

	#define DEBUG_VERBOSE_MSG 0x01
	#define DEBUG_VERBOSE_DRI 0x02
	#define DEBUG_VERBOSE_IOCTL 0x04
	#define DEBUG_VERBOSE_TEXTURE 0x08
	#define DEBUG_VERBOSE_FALLBACK 0x10

	static INLINE GLuint mgaPackColor(GLuint cpp,
	GLubyte r, GLubyte g,
	GLubyte b, GLubyte a)
	{
	switch (cpp) {
	case 2:
	return PACK_COLOR_565( r, g, b );
	case 4:
	return PACK_COLOR_8888( a, r, g, b );
	default:
	return 0;
	}
	}


	/*
	* Subpixel offsets for window coordinates:
	*/
	#define SUBPIXEL_X (-0.5F)
	#define SUBPIXEL_Y (-0.5F + 0.125)


	#define MGA_WA_TRIANGLES 0x18000000
	#define MGA_WA_TRISTRIP_T0 0x02010200
	#define MGA_WA_TRIFAN_T0 0x01000408
	#define MGA_WA_TRISTRIP_T0T1 0x02010400
	#define MGA_WA_TRIFAN_T0T1 0x01000810

	#endif