1 /**************************************************************************
3 * Copyright 2006 Tungsten Graphics, Inc., Cedar Park, Texas.
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portionsalloc
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
21 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
26 **************************************************************************/
34 #include "bufferobj.h"
35 #include "swrast/swrast.h"
37 #include "intel_screen.h"
38 #include "intel_context.h"
39 #include "intel_ioctl.h"
40 #include "intel_batchbuffer.h"
41 #include "intel_blit.h"
42 #include "intel_regions.h"
43 #include "intel_buffer_objects.h"
47 #define FILE_DEBUG_FLAG DEBUG_PIXEL
50 /* Unlike the other intel_pixel_* functions, the expectation here is
51 * that the incoming data is not in a PBO. With the XY_TEXT blit
52 * method, there's no benefit haveing it in a PBO, but we could
53 * implement a path based on XY_MONO_SRC_COPY_BLIT which might benefit
54 * PBO bitmaps. I think they are probably pretty rare though - I
55 * wonder if Xgl uses them?
57 static const GLubyte
*map_pbo( GLcontext
*ctx
,
58 GLsizei width
, GLsizei height
,
59 const struct gl_pixelstore_attrib
*unpack
,
60 const GLubyte
*bitmap
)
64 if (!_mesa_validate_pbo_access(2, unpack
, width
, height
, 1,
65 GL_COLOR_INDEX
, GL_BITMAP
,
67 _mesa_error(ctx
, GL_INVALID_OPERATION
,"glBitmap(invalid PBO access)");
71 buf
= (GLubyte
*) ctx
->Driver
.MapBuffer(ctx
, GL_PIXEL_UNPACK_BUFFER_EXT
,
75 _mesa_error(ctx
, GL_INVALID_OPERATION
, "glBitmap(PBO is mapped)");
79 return ADD_POINTERS(buf
, bitmap
);
82 static GLboolean
test_bit( const GLubyte
*src
,
85 return (src
[bit
/8] & (1<<(bit
% 8))) ? 1 : 0;
88 static void set_bit( GLubyte
*dest
,
91 dest
[bit
/8] |= 1 << (bit
% 8);
94 static int align(int x
, int align
)
96 return (x
+ align
- 1) & ~(align
- 1);
99 /* Extract a rectangle's worth of data from the bitmap. Called
102 static GLuint
get_bitmap_rect(GLsizei width
, GLsizei height
,
103 const struct gl_pixelstore_attrib
*unpack
,
104 const GLubyte
*bitmap
,
111 GLuint src_offset
= (x
+ unpack
->SkipPixels
) & 0x7;
112 GLuint mask
= unpack
->LsbFirst
? 0 : 7;
119 if (INTEL_DEBUG
& DEBUG_PIXEL
)
120 _mesa_printf("%s %d,%d %dx%d bitmap %dx%d skip %d src_offset %d mask %d\n",
121 __FUNCTION__
, x
,y
,w
,h
,width
,height
,unpack
->SkipPixels
, src_offset
, mask
);
134 /* Require that dest be pre-zero'd.
136 for (row
= first
; row
!= (last
+incr
); row
+= incr
) {
137 const GLubyte
*rowsrc
= _mesa_image_address2d(unpack
, bitmap
,
139 GL_COLOR_INDEX
, GL_BITMAP
,
142 for (col
= 0; col
< w
; col
++, bit
++) {
143 if (test_bit(rowsrc
, (col
+ src_offset
) ^ mask
)) {
144 set_bit(dest
, bit
^ 7);
150 bit
= (bit
+ row_align
- 1) & ~(row_align
- 1);
163 do_blit_bitmap( GLcontext
*ctx
,
164 GLint dstx
, GLint dsty
,
165 GLsizei width
, GLsizei height
,
166 const struct gl_pixelstore_attrib
*unpack
,
167 const GLubyte
*bitmap
)
169 struct intel_context
*intel
= intel_context(ctx
);
170 struct intel_region
*dst
= intel_drawbuf_region(intel
);
181 if (unpack
->BufferObj
->Name
) {
182 bitmap
= map_pbo(ctx
, width
, height
, unpack
, bitmap
);
184 return GL_TRUE
; /* even though this is an error, we're done */
187 COPY_4V(tmpColor
, ctx
->Current
.RasterColor
);
189 if (NEED_SECONDARY_COLOR(ctx
)) {
190 ADD_3V(tmpColor
, tmpColor
, ctx
->Current
.RasterSecondaryColor
);
193 UNCLAMPED_FLOAT_TO_CHAN(color
.ub
[0], tmpColor
[2]);
194 UNCLAMPED_FLOAT_TO_CHAN(color
.ub
[1], tmpColor
[1]);
195 UNCLAMPED_FLOAT_TO_CHAN(color
.ub
[2], tmpColor
[0]);
196 UNCLAMPED_FLOAT_TO_CHAN(color
.ub
[3], tmpColor
[3]);
198 /* Does zoom apply to bitmaps?
200 if (!intel_check_blit_fragment_ops(ctx
) ||
201 ctx
->Pixel
.ZoomX
!= 1.0F
||
202 ctx
->Pixel
.ZoomY
!= 1.0F
)
205 LOCK_HARDWARE(intel
);
207 if (intel
->driDrawable
->numClipRects
) {
208 __DRIdrawablePrivate
*dPriv
= intel
->driDrawable
;
209 drm_clip_rect_t
*box
= dPriv
->pClipRects
;
210 drm_clip_rect_t dest_rect
;
211 GLint nbox
= dPriv
->numClipRects
;
212 GLint srcx
= 0, srcy
= 0;
213 GLint orig_screen_x1
, orig_screen_y2
;
217 orig_screen_x1
= dPriv
->x
+ dstx
;
218 orig_screen_y2
= dPriv
->y
+ (dPriv
->h
- dsty
);
220 /* Do scissoring in GL coordinates:
222 if (ctx
->Scissor
.Enabled
)
224 GLint x
= ctx
->Scissor
.X
;
225 GLint y
= ctx
->Scissor
.Y
;
226 GLuint w
= ctx
->Scissor
.Width
;
227 GLuint h
= ctx
->Scissor
.Height
;
229 if (!_mesa_clip_to_region(x
, y
, x
+w
-1, y
+h
-1, &dstx
, &dsty
, &width
, &height
))
233 /* Convert from GL to hardware coordinates:
235 dsty
= dPriv
->y
+ (dPriv
->h
- dsty
- height
);
236 dstx
= dPriv
->x
+ dstx
;
238 dest_rect
.x1
= dstx
< 0 ? 0 : dstx
;
239 dest_rect
.y1
= dsty
< 0 ? 0 : dsty
;
240 dest_rect
.x2
= dstx
+ width
< 0 ? 0 : dstx
+ width
;
241 dest_rect
.y2
= dsty
+ height
< 0 ? 0 : dsty
+ height
;
243 for (i
= 0; i
< nbox
; i
++) {
244 drm_clip_rect_t rect
;
249 if (!intel_intersect_cliprects(&rect
, &dest_rect
, &box
[i
]))
252 /* Now go back to GL coordinates to figure out what subset of
253 * the bitmap we are uploading for this cliprect:
255 box_w
= rect
.x2
- rect
.x1
;
256 box_h
= rect
.y2
- rect
.y1
;
257 srcx
= rect
.x1
- orig_screen_x1
;
258 srcy
= orig_screen_y2
- rect
.y2
;
264 /* Then, finally, chop it all into chunks that can be
265 * digested by hardware:
267 for (py
= 0; py
< box_h
; py
+= DY
) {
268 for (px
= 0; px
< box_w
; px
+= DX
) {
269 int h
= MIN2(DY
, box_h
- py
);
270 int w
= MIN2(DX
, box_w
- px
);
271 GLuint sz
= align(align(w
,8) * h
, 64)/8;
272 GLenum logic_op
= ctx
->Color
.ColorLogicOpEnabled
?
273 ctx
->Color
.LogicOp
: GL_COPY
;
275 assert(sz
<= sizeof(stipple
));
276 memset(stipple
, 0, sz
);
278 /* May need to adjust this when padding has been introduced in
281 if (get_bitmap_rect(width
, height
, unpack
,
283 srcx
+ px
, srcy
+ py
, w
, h
,
291 intelEmitImmediateColorExpandBlit( intel
,
307 intel
->need_flush
= GL_TRUE
;
309 intel_batchbuffer_flush(intel
->batch
);
311 UNLOCK_HARDWARE(intel
);
314 if (unpack
->BufferObj
->Name
) {
315 /* done with PBO so unmap it now */
316 ctx
->Driver
.UnmapBuffer(ctx
, GL_PIXEL_UNPACK_BUFFER_EXT
,
327 /* There are a large number of possible ways to implement bitmap on
328 * this hardware, most of them have some sort of drawback. Here are a
329 * few that spring to mind:
332 * - XY_MONO_SRC_BLT_CMD
333 * - use XY_SETUP_CLIP_BLT for cliprect clipping.
335 * - XY_TEXT_IMMEDIATE_BLT
336 * - blit per cliprect, subject to maximum immediate data size.
338 * - per pixel or run of pixels
340 * - good for sparse bitmaps
344 * - Translate bitmap to an alpha texture and render as a quad
345 * - Chop bitmap up into 32x32 squares and render w/polygon stipple.
348 intelBitmap(GLcontext
* ctx
,
350 GLsizei width
, GLsizei height
,
351 const struct gl_pixelstore_attrib
*unpack
,
352 const GLubyte
* pixels
)
354 if (do_blit_bitmap(ctx
, x
, y
, width
, height
,
358 if (INTEL_DEBUG
& DEBUG_PIXEL
)
359 _mesa_printf("%s: fallback to swrast\n", __FUNCTION__
);
361 _swrast_Bitmap(ctx
, x
, y
, width
, height
, unpack
, pixels
);