1 /* $XFree86: xc/lib/GL/mesa/src/drv/mga/mgacontext.h,v 1.7 2002/12/16 16:18:52 dawes Exp $*/
3 * Copyright 2000-2001 VA Linux Systems, Inc.
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * on the rights to use, copy, modify, merge, publish, distribute, sub
10 * license, and/or sell copies of the Software, and to permit persons to whom
11 * the Software is furnished to do so, subject to the following conditions:
13 * The above copyright notice and this permission notice (including the next
14 * paragraph) shall be included in all copies or substantial portions of the
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
20 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
21 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
22 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
23 * OTHER DEALINGS IN THE SOFTWARE.
26 * Keith Whitwell <keith@tungstengraphics.com>
41 #include "xmlconfig.h"
43 #define MGA_SET_FIELD(reg,mask,val) reg = ((reg) & (mask)) | ((val) & ~(mask))
44 #define MGA_FIELD(field,val) (((val) << (field ## _SHIFT)) & ~(field ## _MASK))
45 #define MGA_GET_FIELD(field, val) ((val & ~(field ## _MASK)) >> (field ## _SHIFT))
47 #define MGA_IS_G200(mmesa) (mmesa->mgaScreen->chipset == MGA_CARD_TYPE_G200)
48 #define MGA_IS_G400(mmesa) (mmesa->mgaScreen->chipset == MGA_CARD_TYPE_G400)
52 * - texture env GL_BLEND -- can be fixed
53 * - 1D and 3D textures
54 * - incomplete textures
55 * - GL_DEPTH_FUNC == GL_NEVER not in h/w
57 #define MGA_FALLBACK_TEXTURE 0x1
58 #define MGA_FALLBACK_DRAW_BUFFER 0x2
59 #define MGA_FALLBACK_READ_BUFFER 0x4
60 #define MGA_FALLBACK_BLEND 0x8
61 #define MGA_FALLBACK_RENDERMODE 0x10
62 #define MGA_FALLBACK_STENCIL 0x20
63 #define MGA_FALLBACK_DEPTH 0x40
64 #define MGA_FALLBACK_BORDER_MODE 0x80
67 /* Use the templated vertex formats:
70 #include "tnl_dd/t_dd_vertex.h"
73 typedef struct mga_context_t mgaContext
;
74 typedef struct mga_context_t
*mgaContextPtr
;
76 typedef void (*mga_tri_func
)( mgaContextPtr
, mgaVertex
*, mgaVertex
*,
78 typedef void (*mga_line_func
)( mgaContextPtr
, mgaVertex
*, mgaVertex
* );
79 typedef void (*mga_point_func
)( mgaContextPtr
, mgaVertex
* );
83 /* Texture environment color
85 #define RGB_ZERO(c) (((c) & 0xffffff) == 0x000000)
86 #define RGB_ONE(c) (((c) & 0xffffff) == 0xffffff)
87 #define ALPHA_ZERO(c) (((c) >> 24) == 0x00)
88 #define ALPHA_ONE(c) (((c) >> 24) == 0xff)
89 #define RGBA_EQUAL(c) ((c) == PACK_COLOR_8888( (c) & 0xff, (c) & 0xff, \
90 (c) & 0xff, (c) & 0xff ))
92 struct mga_texture_object_s
;
93 struct mga_screen_private_s
;
95 #define G200_TEX_MAXLEVELS 5
96 #define G400_TEX_MAXLEVELS 11
98 typedef struct mga_texture_object_s
100 driTextureObject base
;
102 /* The G200 only has the ability to use 5 mipmap levels (including the
103 * base level). The G400 does not have this restriction, but it still
104 * only has 5 offset pointers in the hardware. The trick on the G400 is
105 * upto the first 4 offset pointers point to mipmap levels. The last
106 * offset pointer tells how large the preceeding mipmap is. This value is
107 * then used to determine where the remaining mipmaps are.
109 * For example, if the first offsets[0] through offsets[2] are used as
110 * pointers, then offset[3] will be the size of the mipmap pointed to by
111 * offsets[2]. So mipmap level 3 will be at (offsets[2]+offsets[3]). For
112 * each successive mipmap level, offsets[3] is divided by 4 and added to
113 * the previous address. So mipmap level 4 will be at
114 * (offsets[2]+offsets[3]+(offsets[3] / 4)).
116 * The last pointer is selected by setting TO_texorgoffsetsel in its
117 * pointer. In the previous example, offset[2] would have
118 * TO_texorgoffsetsel or'ed in before writing it to the hardware.
120 * In the current driver all of the mipmaps are packed together linearly
121 * with mipmap level 0. Therefore offsets[0] points to the base of the
122 * texture (and has TO_texorgoffsetsel or'ed in), and offsets[1] is the
123 * size of the base texture.
125 * There is a possible optimization available here. At times the driver
126 * may not be able to allocate a single block of memory for the complete
127 * texture without ejecting some other textures from memory. It may be
128 * possible to put some of the lower mipmap levels (i.e., the larger
129 * mipmaps) in memory separate from the higher levels.
131 * The implementation should be fairly obvious, but getting "right" would
132 * likely be non-trivial. A first allocation for the entire texture would
133 * be attempted with a flag that says "don't eject other textures." If
134 * that failed, an additional allocation would be attmpted for just the
135 * base map. The process would repeat with the block of lower maps. The
136 * tricky parts would be in detecting when some of the levels had been
137 * ejected from texture memory by other textures and preventing the
138 * 4th allocation (for all the smallest mipmap levels) from kicking out
139 * any of the first three.
141 * This array holds G400_TEX_MAXLEVELS pointers to remove an if-statement
142 * in a loop in mgaSetTexImages. Values past G200_TEX_MAXLEVELS are not
145 GLuint offsets
[G400_TEX_MAXLEVELS
];
150 drm_mga_texture_regs_t setup
;
152 /* If one texture dimension wraps with GL_CLAMP and the other with
153 * GL_CLAMP_TO_EDGE, we have to fallback to software. We would also have
154 * to fallback for GL_CLAMP_TO_BORDER.
156 GLboolean border_fallback
;
157 /* Depending on multitxturing and environment color
158 * GL_BLEND may have to be a software fallback.
160 GLboolean texenv_fallback
;
161 } mgaTextureObject_t
;
163 struct mga_hw_state
{
169 GLuint stencil_enable
;
173 GLuint alpha_func_enable
;
175 GLuint blend_func_enable
;
179 struct mga_context_t
{
182 unsigned int lastStamp
; /* fullscreen breaks dpriv->laststamp,
183 * need to shadow it here. */
185 /* Hardware state management
187 struct mga_hw_state hw
;
189 /* Bookkeeping for texturing
192 driTexHeap
* texture_heaps
[ MGA_NR_TEX_HEAPS
];
193 driTextureObject swapped
;
195 struct mga_texture_object_s
*CurrentTexObj
[2];
198 /* Map GL texture units onto hardware.
200 GLuint tmu_source
[2];
208 /* Texture environment color.
210 unsigned int envcolor
[2];
212 GLboolean force_dualtex
;
214 /* Rasterization state
216 GLuint SetupNewInputs
;
221 GLenum raster_primitive
;
222 GLenum render_primitive
;
225 GLint vertex_stride_shift
;
226 GLuint vertex_format
;
229 /* Fallback rasterization functions
231 mga_point_func draw_point
;
232 mga_line_func draw_line
;
233 mga_tri_func draw_tri
;
236 /* Manage driver and hardware state
241 drm_mga_context_regs_t setup
;
248 GLuint depth_clear_mask
;
249 GLuint stencil_clear_mask
;
251 GLuint haveHwStipple
;
252 GLfloat hw_viewport
[16];
256 drmBufPtr vertex_dma_buffer
;
257 drmBufPtr iload_buffer
;
265 int64_t swap_missed_ust
;
268 GLuint swap_missed_count
;
270 PFNGLXGETUSTPROC get_ust
;
272 /* Drawable, cliprect and scissor information
274 int dirty_cliprects
; /* which sets of cliprects are uptodate? */
275 int draw_buffer
; /* which buffer are we rendering to */
276 unsigned int drawOffset
; /* draw buffer address in space */
278 int drawX
, drawY
; /* origin of drawable in draw buffer */
279 int lastX
, lastY
; /* detect DSTORG bug */
280 GLuint numClipRects
; /* cliprects for the draw buffer */
281 drm_clip_rect_t
*pClipRects
;
282 drm_clip_rect_t draw_rect
;
283 drm_clip_rect_t scissor_rect
;
286 drm_clip_rect_t tmp_boxes
[2][MGA_NR_SAREA_CLIPRECTS
];
289 /* Texture aging and DMA based aging.
291 unsigned int texAge
[MGA_NR_TEX_HEAPS
];/* texture LRU age */
292 unsigned int dirtyAge
; /* buffer age for synchronization */
294 GLuint primary_offset
;
296 /* Mirrors of some DRI state.
298 drm_context_t hHWContext
;
299 drm_hw_lock_t
*driHwLock
;
301 __DRIdrawablePrivate
*driDrawable
;
302 __DRIdrawablePrivate
*driReadable
;
305 * Drawable used by Mesa for software fallbacks for reading and
306 * writing. It is set by Mesa's \c SetBuffer callback, and will always be
307 * either \c mga_context_t::driDrawable or \c mga_context_t::driReadable.
309 __DRIdrawablePrivate
*mesa_drawable
;
311 __DRIscreenPrivate
*driScreen
;
312 struct mga_screen_private_s
*mgaScreen
;
313 drm_mga_sarea_t
*sarea
;
315 /* Configuration cache
317 driOptionCache optionCache
;
320 #define MGA_CONTEXT(ctx) ((mgaContextPtr)(ctx->DriverCtx))
325 /* ================================================================
331 extern int MGA_DEBUG
;
336 #define DEBUG_VERBOSE_MSG 0x01
337 #define DEBUG_VERBOSE_DRI 0x02
338 #define DEBUG_VERBOSE_IOCTL 0x04
339 #define DEBUG_VERBOSE_TEXTURE 0x08
340 #define DEBUG_VERBOSE_FALLBACK 0x10
342 static __inline__ GLuint
mgaPackColor(GLuint cpp
,
343 GLubyte r
, GLubyte g
,
344 GLubyte b
, GLubyte a
)
348 return PACK_COLOR_565( r
, g
, b
);
350 return PACK_COLOR_8888( a
, r
, g
, b
);
358 * Subpixel offsets for window coordinates:
360 #define SUBPIXEL_X (-0.5F)
361 #define SUBPIXEL_Y (-0.5F + 0.125)
364 #define MGA_WA_TRIANGLES 0x18000000
365 #define MGA_WA_TRISTRIP_T0 0x02010200
366 #define MGA_WA_TRIFAN_T0 0x01000408
367 #define MGA_WA_TRISTRIP_T0T1 0x02010400
368 #define MGA_WA_TRIFAN_T0T1 0x01000810