1 /**************************************************************************
3 * Copyright 2006 VMware, Inc.
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 VMWARE 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 **************************************************************************/
28 #include "main/glheader.h"
29 #include "main/enums.h"
30 #include "main/image.h"
31 #include "main/colormac.h"
32 #include "main/condrender.h"
33 #include "main/mtypes.h"
34 #include "main/macros.h"
36 #include "main/bufferobj.h"
37 #include "main/state.h"
38 #include "main/texobj.h"
39 #include "main/context.h"
40 #include "main/fbobject.h"
41 #include "swrast/swrast.h"
42 #include "drivers/common/meta.h"
44 #include "intel_screen.h"
45 #include "intel_context.h"
46 #include "intel_batchbuffer.h"
47 #include "intel_blit.h"
48 #include "intel_fbo.h"
49 #include "intel_regions.h"
50 #include "intel_buffers.h"
51 #include "intel_pixel.h"
52 #include "intel_reg.h"
55 #define FILE_DEBUG_FLAG DEBUG_PIXEL
58 /* Unlike the other intel_pixel_* functions, the expectation here is
59 * that the incoming data is not in a PBO. With the XY_TEXT blit
60 * method, there's no benefit haveing it in a PBO, but we could
61 * implement a path based on XY_MONO_SRC_COPY_BLIT which might benefit
62 * PBO bitmaps. I think they are probably pretty rare though - I
63 * wonder if Xgl uses them?
65 static const GLubyte
*map_pbo( struct gl_context
*ctx
,
66 GLsizei width
, GLsizei height
,
67 const struct gl_pixelstore_attrib
*unpack
,
68 const GLubyte
*bitmap
)
72 if (!_mesa_validate_pbo_access(2, unpack
, width
, height
, 1,
73 GL_COLOR_INDEX
, GL_BITMAP
,
74 INT_MAX
, (const GLvoid
*) bitmap
)) {
75 _mesa_error(ctx
, GL_INVALID_OPERATION
,"glBitmap(invalid PBO access)");
79 buf
= (GLubyte
*) ctx
->Driver
.MapBufferRange(ctx
, 0, unpack
->BufferObj
->Size
,
83 _mesa_error(ctx
, GL_INVALID_OPERATION
, "glBitmap(PBO is mapped)");
87 return ADD_POINTERS(buf
, bitmap
);
90 static bool test_bit( const GLubyte
*src
, GLuint bit
)
92 return (src
[bit
/8] & (1<<(bit
% 8))) ? 1 : 0;
95 static void set_bit( GLubyte
*dest
, GLuint bit
)
97 dest
[bit
/8] |= 1 << (bit
% 8);
100 /* Extract a rectangle's worth of data from the bitmap. Called
101 * per chunk of HW-sized bitmap.
103 static GLuint
get_bitmap_rect(GLsizei width
, GLsizei height
,
104 const struct gl_pixelstore_attrib
*unpack
,
105 const GLubyte
*bitmap
,
112 GLuint src_offset
= (x
+ unpack
->SkipPixels
) & 0x7;
113 GLuint mask
= unpack
->LsbFirst
? 0 : 7;
120 DBG("%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
= ALIGN(bit
, row_align
);
157 * Returns the low Y value of the vertical range given, flipped according to
158 * whether the framebuffer is or not.
161 y_flip(struct gl_framebuffer
*fb
, int y
, int height
)
163 if (_mesa_is_user_fbo(fb
))
166 return fb
->Height
- y
- height
;
173 do_blit_bitmap( struct gl_context
*ctx
,
174 GLint dstx
, GLint dsty
,
175 GLsizei width
, GLsizei height
,
176 const struct gl_pixelstore_attrib
*unpack
,
177 const GLubyte
*bitmap
)
179 struct intel_context
*intel
= intel_context(ctx
);
180 struct gl_framebuffer
*fb
= ctx
->DrawBuffer
;
181 struct intel_renderbuffer
*irb
;
185 GLsizei bitmap_width
= width
;
186 GLsizei bitmap_height
= height
;
189 GLint orig_dstx
= dstx
;
190 GLint orig_dsty
= dsty
;
192 /* Update draw buffer bounds */
193 _mesa_update_state(ctx
);
195 if (ctx
->Depth
.Test
) {
196 /* The blit path produces incorrect results when depth testing is on.
197 * It seems the blit Z coord is always 1.0 (the far plane) so fragments
198 * will likely be obscured by other, closer geometry.
203 intel_prepare_render(intel
);
205 if (fb
->_NumColorDrawBuffers
!= 1) {
206 perf_debug("accelerated glBitmap() only supports rendering to a "
207 "single color buffer\n");
211 irb
= intel_renderbuffer(fb
->_ColorDrawBuffers
[0]);
213 if (_mesa_is_bufferobj(unpack
->BufferObj
)) {
214 bitmap
= map_pbo(ctx
, width
, height
, unpack
, bitmap
);
216 return true; /* even though this is an error, we're done */
219 COPY_4V(tmpColor
, ctx
->Current
.RasterColor
);
221 if (_mesa_need_secondary_color(ctx
)) {
222 ADD_3V(tmpColor
, tmpColor
, ctx
->Current
.RasterSecondaryColor
);
225 UNCLAMPED_FLOAT_TO_UBYTE(ubcolor
[0], tmpColor
[0]);
226 UNCLAMPED_FLOAT_TO_UBYTE(ubcolor
[1], tmpColor
[1]);
227 UNCLAMPED_FLOAT_TO_UBYTE(ubcolor
[2], tmpColor
[2]);
228 UNCLAMPED_FLOAT_TO_UBYTE(ubcolor
[3], tmpColor
[3]);
230 switch (irb
->mt
->format
) {
231 case MESA_FORMAT_B8G8R8A8_UNORM
:
232 case MESA_FORMAT_B8G8R8X8_UNORM
:
233 color
= PACK_COLOR_8888(ubcolor
[3], ubcolor
[0], ubcolor
[1], ubcolor
[2]);
235 case MESA_FORMAT_B5G6R5_UNORM
:
236 color
= PACK_COLOR_565(ubcolor
[0], ubcolor
[1], ubcolor
[2]);
239 perf_debug("Unsupported format %s in accelerated glBitmap()\n",
240 _mesa_get_format_name(irb
->mt
->format
));
244 if (!intel_check_blit_fragment_ops(ctx
, tmpColor
[3] == 1.0F
))
247 /* Clip to buffer bounds and scissor. */
248 if (!_mesa_clip_to_region(fb
->_Xmin
, fb
->_Ymin
,
249 fb
->_Xmax
, fb
->_Ymax
,
250 &dstx
, &dsty
, &width
, &height
))
253 dsty
= y_flip(fb
, dsty
, height
);
258 /* Chop it all into chunks that can be digested by hardware: */
259 for (py
= 0; py
< height
; py
+= DY
) {
260 for (px
= 0; px
< width
; px
+= DX
) {
261 int h
= MIN2(DY
, height
- py
);
262 int w
= MIN2(DX
, width
- px
);
263 GLuint sz
= ALIGN(ALIGN(w
,8) * h
, 64)/8;
264 GLenum logic_op
= ctx
->Color
.ColorLogicOpEnabled
?
265 ctx
->Color
.LogicOp
: GL_COPY
;
267 assert(sz
<= sizeof(stipple
));
268 memset(stipple
, 0, sz
);
270 /* May need to adjust this when padding has been introduced in
273 * Have to translate destination coordinates back into source
276 int count
= get_bitmap_rect(bitmap_width
, bitmap_height
, unpack
,
278 -orig_dstx
+ (dstx
+ px
),
279 -orig_dsty
+ y_flip(fb
, dsty
+ py
, h
),
283 _mesa_is_winsys_fbo(fb
));
287 if (!intelEmitImmediateColorExpandBlit(intel
,
292 irb
->mt
->region
->pitch
,
295 irb
->mt
->region
->tiling
,
303 if (ctx
->Query
.CurrentOcclusionObject
)
304 ctx
->Query
.CurrentOcclusionObject
->Result
+= count
;
309 if (unlikely(INTEL_DEBUG
& DEBUG_SYNC
))
310 intel_batchbuffer_flush(intel
);
312 if (_mesa_is_bufferobj(unpack
->BufferObj
)) {
313 /* done with PBO so unmap it now */
314 ctx
->Driver
.UnmapBuffer(ctx
, unpack
->BufferObj
);
317 intel_check_front_buffer_rendering(intel
);
323 /* There are a large number of possible ways to implement bitmap on
324 * this hardware, most of them have some sort of drawback. Here are a
325 * few that spring to mind:
328 * - XY_MONO_SRC_BLT_CMD
329 * - use XY_SETUP_CLIP_BLT for cliprect clipping.
331 * - XY_TEXT_IMMEDIATE_BLT
332 * - blit per cliprect, subject to maximum immediate data size.
334 * - per pixel or run of pixels
336 * - good for sparse bitmaps
340 * - Translate bitmap to an alpha texture and render as a quad
341 * - Chop bitmap up into 32x32 squares and render w/polygon stipple.
344 intelBitmap(struct gl_context
* ctx
,
346 GLsizei width
, GLsizei height
,
347 const struct gl_pixelstore_attrib
*unpack
,
348 const GLubyte
* pixels
)
350 if (!_mesa_check_conditional_render(ctx
))
353 if (do_blit_bitmap(ctx
, x
, y
, width
, height
,
357 _mesa_meta_Bitmap(ctx
, x
, y
, width
, height
, unpack
, pixels
);