2 * Mesa 3-D graphics library
5 * Copyright (C) 1999-2005 Brian Paul All Rights Reserved.
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the "Software"),
9 * to deal in the Software without restriction, including without limitation
10 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
11 * and/or sell copies of the Software, and to permit persons to whom the
12 * Software is furnished to do so, subject to the following conditions:
14 * The above copyright notice and this permission notice shall be included
15 * in all copies or substantial portions of the Software.
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
21 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
22 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
30 #include "histogram.h"
36 #include "s_context.h"
38 #include "s_pixeltex.h"
40 #include "s_stencil.h"
46 * Determine if there's overlap in an image copy.
47 * This test also compensates for the fact that copies are done from
48 * bottom to top and overlaps can sometimes be handled correctly
49 * without making a temporary image copy.
52 regions_overlap(GLint srcx
, GLint srcy
,
53 GLint dstx
, GLint dsty
,
54 GLint width
, GLint height
,
55 GLfloat zoomX
, GLfloat zoomY
)
57 if (zoomX
== 1.0 && zoomY
== 1.0) {
59 if (srcx
>= dstx
+ width
|| (srcx
+ width
<= dstx
)) {
62 else if (srcy
< dsty
) { /* this is OK */
65 else if (srcy
> dsty
+ height
) {
73 /* add one pixel of slop when zooming, just to be safe */
74 if ((srcx
> dstx
+ (width
* zoomX
) + 1) || (srcx
+ width
+ 1 < dstx
)) {
77 else if ((srcy
< dsty
) && (srcy
+ height
< dsty
+ (height
* zoomY
))) {
80 else if ((srcy
> dsty
) && (srcy
+ height
> dsty
+ (height
* zoomY
))) {
91 * Convert GLfloat[n][4] colors to GLchan[n][4].
92 * XXX maybe move into image.c
95 float_span_to_chan(GLuint n
, CONST GLfloat in
[][4], GLchan out
[][4])
98 for (i
= 0; i
< n
; i
++) {
99 UNCLAMPED_FLOAT_TO_CHAN(out
[i
][RCOMP
], in
[i
][RCOMP
]);
100 UNCLAMPED_FLOAT_TO_CHAN(out
[i
][GCOMP
], in
[i
][GCOMP
]);
101 UNCLAMPED_FLOAT_TO_CHAN(out
[i
][BCOMP
], in
[i
][BCOMP
]);
102 UNCLAMPED_FLOAT_TO_CHAN(out
[i
][ACOMP
], in
[i
][ACOMP
]);
108 * Convert GLchan[n][4] colors to GLfloat[n][4].
109 * XXX maybe move into image.c
112 chan_span_to_float(GLuint n
, CONST GLchan in
[][4], GLfloat out
[][4])
115 for (i
= 0; i
< n
; i
++) {
116 out
[i
][RCOMP
] = CHAN_TO_FLOAT(in
[i
][RCOMP
]);
117 out
[i
][GCOMP
] = CHAN_TO_FLOAT(in
[i
][GCOMP
]);
118 out
[i
][BCOMP
] = CHAN_TO_FLOAT(in
[i
][BCOMP
]);
119 out
[i
][ACOMP
] = CHAN_TO_FLOAT(in
[i
][ACOMP
]);
126 * RGBA copypixels with convolution.
129 copy_conv_rgba_pixels(GLcontext
*ctx
, GLint srcx
, GLint srcy
,
130 GLint width
, GLint height
, GLint destx
, GLint desty
)
132 struct gl_renderbuffer
*drawRb
= NULL
;
133 GLboolean quick_draw
;
135 const GLboolean zoom
= ctx
->Pixel
.ZoomX
!= 1.0F
|| ctx
->Pixel
.ZoomY
!= 1.0F
;
136 const GLuint transferOps
= ctx
->_ImageTransferState
;
137 GLfloat
*dest
, *tmpImage
, *convImage
;
140 INIT_SPAN(span
, GL_BITMAP
, 0, 0, SPAN_RGBA
);
143 _swrast_span_default_z(ctx
, &span
);
144 if (ctx
->Fog
.Enabled
)
145 _swrast_span_default_fog(ctx
, &span
);
148 if (SWRAST_CONTEXT(ctx
)->_RasterMask
== 0
151 && destx
+ width
<= (GLint
) ctx
->DrawBuffer
->Width
) {
152 quick_draw
= GL_TRUE
;
153 drawRb
= ctx
->DrawBuffer
->_ColorDrawBuffers
[0][0];
156 quick_draw
= GL_FALSE
;
159 /* allocate space for GLfloat image */
160 tmpImage
= (GLfloat
*) _mesa_malloc(width
* height
* 4 * sizeof(GLfloat
));
162 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glCopyPixels");
165 convImage
= (GLfloat
*) _mesa_malloc(width
* height
* 4 * sizeof(GLfloat
));
167 _mesa_free(tmpImage
);
168 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glCopyPixels");
172 /* read source image */
174 for (row
= 0; row
< height
; row
++) {
175 GLchan rgba
[MAX_WIDTH
][4];
176 /* Read GLchan and convert to GLfloat */
177 _swrast_read_rgba_span(ctx
, ctx
->ReadBuffer
->_ColorReadBuffer
,
178 width
, srcx
, srcy
+ row
, rgba
);
179 chan_span_to_float(width
, (CONST
GLchan (*)[4]) rgba
,
180 (GLfloat (*)[4]) dest
);
184 /* do the image transfer ops which preceed convolution */
185 for (row
= 0; row
< height
; row
++) {
186 GLfloat (*rgba
)[4] = (GLfloat (*)[4]) (tmpImage
+ row
* width
* 4);
187 _mesa_apply_rgba_transfer_ops(ctx
,
188 transferOps
& IMAGE_PRE_CONVOLUTION_BITS
,
193 if (ctx
->Pixel
.Convolution2DEnabled
) {
194 _mesa_convolve_2d_image(ctx
, &width
, &height
, tmpImage
, convImage
);
197 ASSERT(ctx
->Pixel
.Separable2DEnabled
);
198 _mesa_convolve_sep_image(ctx
, &width
, &height
, tmpImage
, convImage
);
200 _mesa_free(tmpImage
);
202 /* do remaining post-convolution image transfer ops */
203 for (row
= 0; row
< height
; row
++) {
204 GLfloat (*rgba
)[4] = (GLfloat (*)[4]) (convImage
+ row
* width
* 4);
205 _mesa_apply_rgba_transfer_ops(ctx
,
206 transferOps
& IMAGE_POST_CONVOLUTION_BITS
,
210 /* write the new image */
211 for (row
= 0; row
< height
; row
++) {
212 const GLfloat
*src
= convImage
+ row
* width
* 4;
215 /* convert floats back to chan */
216 float_span_to_chan(width
, (const GLfloat (*)[4]) src
, span
.array
->rgba
);
218 if (ctx
->Pixel
.PixelTextureEnabled
&& ctx
->Texture
._EnabledUnits
) {
220 _swrast_pixel_texture(ctx
, &span
);
223 /* write row to framebuffer */
226 if (quick_draw
&& dy
>= 0 && dy
< (GLint
) ctx
->DrawBuffer
->Height
) {
227 drawRb
->PutRow(ctx
, drawRb
, width
, destx
, dy
, span
.array
->rgba
, NULL
);
234 _swrast_write_zoomed_rgba_span(ctx
, destx
, desty
, &span
,
235 (CONST
GLchan (*)[4])span
.array
->rgba
);
238 _swrast_write_rgba_span(ctx
, &span
);
243 _mesa_free(convImage
);
251 copy_rgba_pixels(GLcontext
*ctx
, GLint srcx
, GLint srcy
,
252 GLint width
, GLint height
, GLint destx
, GLint desty
)
254 struct gl_renderbuffer
*drawRb
;
256 GLboolean quick_draw
;
257 GLint sy
, dy
, stepy
, j
;
258 const GLboolean zoom
= ctx
->Pixel
.ZoomX
!= 1.0F
|| ctx
->Pixel
.ZoomY
!= 1.0F
;
260 const GLuint transferOps
= ctx
->_ImageTransferState
;
263 if (!ctx
->ReadBuffer
->_ColorReadBuffer
) {
264 /* no readbuffer - OK */
268 INIT_SPAN(span
, GL_BITMAP
, 0, 0, SPAN_RGBA
);
270 if (ctx
->Pixel
.Convolution2DEnabled
|| ctx
->Pixel
.Separable2DEnabled
) {
271 copy_conv_rgba_pixels(ctx
, srcx
, srcy
, width
, height
, destx
, desty
);
275 /* Determine if copy should be done bottom-to-top or top-to-bottom */
277 /* top-down max-to-min */
278 sy
= srcy
+ height
- 1;
279 dy
= desty
+ height
- 1;
283 /* bottom-up min-to-max */
289 if (ctx
->DrawBuffer
== ctx
->ReadBuffer
) {
290 overlapping
= regions_overlap(srcx
, srcy
, destx
, desty
, width
, height
,
291 ctx
->Pixel
.ZoomX
, ctx
->Pixel
.ZoomY
);
294 overlapping
= GL_FALSE
;
298 _swrast_span_default_z(ctx
, &span
);
299 if (ctx
->Fog
.Enabled
)
300 _swrast_span_default_fog(ctx
, &span
);
302 if (SWRAST_CONTEXT(ctx
)->_RasterMask
== 0
305 && destx
+ width
<= (GLint
) ctx
->DrawBuffer
->Width
) {
306 quick_draw
= GL_TRUE
;
307 drawRb
= ctx
->DrawBuffer
->_ColorDrawBuffers
[0][0];
310 quick_draw
= GL_FALSE
;
316 tmpImage
= (GLchan
*) _mesa_malloc(width
* height
* sizeof(GLchan
) * 4);
318 _mesa_error( ctx
, GL_OUT_OF_MEMORY
, "glCopyPixels" );
321 /* read the source image */
323 for (j
= 0; j
< height
; j
++, ssy
+= stepy
) {
324 _swrast_read_rgba_span( ctx
, ctx
->ReadBuffer
->_ColorReadBuffer
,
325 width
, srcx
, ssy
, (GLchan (*)[4]) p
);
331 tmpImage
= NULL
; /* silence compiler warnings */
335 for (j
= 0; j
< height
; j
++, sy
+= stepy
, dy
+= stepy
) {
336 /* Get source pixels */
338 /* get from buffered image */
339 ASSERT(width
< MAX_WIDTH
);
340 MEMCPY(span
.array
->rgba
, p
, width
* sizeof(GLchan
) * 4);
344 /* get from framebuffer */
345 ASSERT(width
< MAX_WIDTH
);
346 _swrast_read_rgba_span( ctx
, ctx
->ReadBuffer
->_ColorReadBuffer
,
347 width
, srcx
, sy
, span
.array
->rgba
);
351 GLfloat rgbaFloat
[MAX_WIDTH
][4];
352 /* convert to float, transfer, convert back to chan */
353 chan_span_to_float(width
, (CONST
GLchan (*)[4]) span
.array
->rgba
,
355 _mesa_apply_rgba_transfer_ops(ctx
, transferOps
, width
, rgbaFloat
);
356 float_span_to_chan(width
, (CONST
GLfloat (*)[4]) rgbaFloat
,
360 if (ctx
->Pixel
.PixelTextureEnabled
&& ctx
->Texture
._EnabledUnits
) {
362 _swrast_pixel_texture(ctx
, &span
);
365 /* Write color span */
366 if (quick_draw
&& dy
>= 0 && dy
< (GLint
) ctx
->DrawBuffer
->Height
) {
367 drawRb
->PutRow(ctx
, drawRb
, width
, destx
, dy
, span
.array
->rgba
, NULL
);
374 _swrast_write_zoomed_rgba_span(ctx
, destx
, desty
, &span
,
375 (CONST
GLchan (*)[4]) span
.array
->rgba
);
378 _swrast_write_rgba_span(ctx
, &span
);
384 _mesa_free(tmpImage
);
389 copy_ci_pixels( GLcontext
*ctx
, GLint srcx
, GLint srcy
,
390 GLint width
, GLint height
,
391 GLint destx
, GLint desty
)
396 const GLboolean zoom
= ctx
->Pixel
.ZoomX
!= 1.0F
|| ctx
->Pixel
.ZoomY
!= 1.0F
;
397 const GLboolean shift_or_offset
= ctx
->Pixel
.IndexShift
|| ctx
->Pixel
.IndexOffset
;
401 if (!ctx
->ReadBuffer
->_ColorReadBuffer
) {
402 /* no readbuffer - OK */
406 INIT_SPAN(span
, GL_BITMAP
, 0, 0, SPAN_INDEX
);
408 /* Determine if copy should be bottom-to-top or top-to-bottom */
410 /* top-down max-to-min */
411 sy
= srcy
+ height
- 1;
412 dy
= desty
+ height
- 1;
416 /* bottom-up min-to-max */
422 if (ctx
->DrawBuffer
== ctx
->ReadBuffer
) {
423 overlapping
= regions_overlap(srcx
, srcy
, destx
, desty
, width
, height
,
424 ctx
->Pixel
.ZoomX
, ctx
->Pixel
.ZoomY
);
427 overlapping
= GL_FALSE
;
431 _swrast_span_default_z(ctx
, &span
);
432 if (ctx
->Fog
.Enabled
)
433 _swrast_span_default_fog(ctx
, &span
);
437 tmpImage
= (GLuint
*) _mesa_malloc(width
* height
* sizeof(GLuint
));
439 _mesa_error( ctx
, GL_OUT_OF_MEMORY
, "glCopyPixels" );
444 for (j
= 0; j
< height
; j
++, ssy
+= stepy
) {
445 _swrast_read_index_span( ctx
, ctx
->ReadBuffer
->_ColorReadBuffer
,
446 width
, srcx
, ssy
, p
);
452 tmpImage
= NULL
; /* silence compiler warning */
456 for (j
= 0; j
< height
; j
++, sy
+= stepy
, dy
+= stepy
) {
457 /* Get color indexes */
459 MEMCPY(span
.array
->index
, p
, width
* sizeof(GLuint
));
463 _swrast_read_index_span( ctx
, ctx
->ReadBuffer
->_ColorReadBuffer
,
464 width
, srcx
, sy
, span
.array
->index
);
467 /* Apply shift, offset, look-up table */
468 if (shift_or_offset
) {
469 _mesa_shift_and_offset_ci( ctx
, width
, span
.array
->index
);
471 if (ctx
->Pixel
.MapColorFlag
) {
472 _mesa_map_ci( ctx
, width
, span
.array
->index
);
475 /* write color indexes */
480 _swrast_write_zoomed_index_span(ctx
, destx
, desty
, &span
);
482 _swrast_write_index_span(ctx
, &span
);
486 _mesa_free(tmpImage
);
495 copy_depth_pixels( GLcontext
*ctx
, GLint srcx
, GLint srcy
,
496 GLint width
, GLint height
,
497 GLint destx
, GLint desty
)
499 struct gl_framebuffer
*fb
= ctx
->ReadBuffer
;
500 struct gl_renderbuffer
*readRb
= fb
->Attachment
[BUFFER_DEPTH
].Renderbuffer
;
501 const GLfloat depthMax
= fb
->_DepthMaxF
;
502 GLfloat
*p
, *tmpImage
;
505 const GLboolean zoom
= ctx
->Pixel
.ZoomX
!= 1.0F
|| ctx
->Pixel
.ZoomY
!= 1.0F
;
510 /* no readbuffer - OK */
514 INIT_SPAN(span
, GL_BITMAP
, 0, 0, SPAN_Z
);
516 /* Determine if copy should be bottom-to-top or top-to-bottom */
518 /* top-down max-to-min */
519 sy
= srcy
+ height
- 1;
520 dy
= desty
+ height
- 1;
524 /* bottom-up min-to-max */
530 if (ctx
->DrawBuffer
== ctx
->ReadBuffer
) {
531 overlapping
= regions_overlap(srcx
, srcy
, destx
, desty
, width
, height
,
532 ctx
->Pixel
.ZoomX
, ctx
->Pixel
.ZoomY
);
535 overlapping
= GL_FALSE
;
538 _swrast_span_default_color(ctx
, &span
);
539 if (ctx
->Fog
.Enabled
)
540 _swrast_span_default_fog(ctx
, &span
);
544 tmpImage
= (GLfloat
*) _mesa_malloc(width
* height
* sizeof(GLfloat
));
546 _mesa_error( ctx
, GL_OUT_OF_MEMORY
, "glCopyPixels" );
550 for (j
= 0; j
< height
; j
++, ssy
+= stepy
) {
551 _swrast_read_depth_span_float(ctx
, readRb
, width
, srcx
, ssy
, p
);
557 tmpImage
= NULL
; /* silence compiler warning */
561 for (j
= 0; j
< height
; j
++, sy
+= stepy
, dy
+= stepy
) {
562 GLfloat depth
[MAX_WIDTH
];
563 /* get depth values */
565 MEMCPY(depth
, p
, width
* sizeof(GLfloat
));
569 _swrast_read_depth_span_float(ctx
, readRb
, width
, srcx
, sy
, depth
);
572 /* apply scale and bias */
573 for (i
= 0; i
< width
; i
++) {
574 GLfloat d
= depth
[i
] * ctx
->Pixel
.DepthScale
+ ctx
->Pixel
.DepthBias
;
575 span
.array
->z
[i
] = (GLuint
) (CLAMP(d
, 0.0F
, 1.0F
) * depthMax
);
578 /* write depth values */
582 if (fb
->Visual
.rgbMode
) {
584 _swrast_write_zoomed_rgba_span(ctx
, destx
, desty
, &span
,
585 (const GLchan (*)[4]) span
.array
->rgba
);
587 _swrast_write_rgba_span(ctx
, &span
);
591 _swrast_write_zoomed_index_span(ctx
, destx
, desty
, &span
);
593 _swrast_write_index_span(ctx
, &span
);
598 _mesa_free(tmpImage
);
604 copy_stencil_pixels( GLcontext
*ctx
, GLint srcx
, GLint srcy
,
605 GLint width
, GLint height
,
606 GLint destx
, GLint desty
)
608 struct gl_framebuffer
*fb
= ctx
->ReadBuffer
;
609 struct gl_renderbuffer
*rb
= fb
->Attachment
[BUFFER_STENCIL
].Renderbuffer
;
612 GLstencil
*p
, *tmpImage
;
613 const GLboolean zoom
= ctx
->Pixel
.ZoomX
!= 1.0F
|| ctx
->Pixel
.ZoomY
!= 1.0F
;
614 const GLboolean shift_or_offset
= ctx
->Pixel
.IndexShift
|| ctx
->Pixel
.IndexOffset
;
618 /* no readbuffer - OK */
622 /* Determine if copy should be bottom-to-top or top-to-bottom */
624 /* top-down max-to-min */
625 sy
= srcy
+ height
- 1;
626 dy
= desty
+ height
- 1;
630 /* bottom-up min-to-max */
636 if (ctx
->DrawBuffer
== ctx
->ReadBuffer
) {
637 overlapping
= regions_overlap(srcx
, srcy
, destx
, desty
, width
, height
,
638 ctx
->Pixel
.ZoomX
, ctx
->Pixel
.ZoomY
);
641 overlapping
= GL_FALSE
;
646 tmpImage
= (GLstencil
*) _mesa_malloc(width
* height
* sizeof(GLstencil
));
648 _mesa_error( ctx
, GL_OUT_OF_MEMORY
, "glCopyPixels" );
652 for (j
= 0; j
< height
; j
++, ssy
+= stepy
) {
653 _swrast_read_stencil_span( ctx
, rb
, width
, srcx
, ssy
, p
);
659 tmpImage
= NULL
; /* silence compiler warning */
663 for (j
= 0; j
< height
; j
++, sy
+= stepy
, dy
+= stepy
) {
664 GLstencil stencil
[MAX_WIDTH
];
666 /* Get stencil values */
668 MEMCPY(stencil
, p
, width
* sizeof(GLstencil
));
672 _swrast_read_stencil_span( ctx
, rb
, width
, srcx
, sy
, stencil
);
675 /* Apply shift, offset, look-up table */
676 if (shift_or_offset
) {
677 _mesa_shift_and_offset_stencil( ctx
, width
, stencil
);
679 if (ctx
->Pixel
.MapStencilFlag
) {
680 _mesa_map_stencil( ctx
, width
, stencil
);
683 /* Write stencil values */
685 _swrast_write_zoomed_stencil_span(ctx
, destx
, desty
, width
,
689 _swrast_write_stencil_span( ctx
, width
, destx
, dy
, stencil
);
694 _mesa_free(tmpImage
);
699 * This isn't terribly efficient. If a drivef really has combined
700 * depth/stencil buffers the driver should implement an optimized
701 * CopyPixels function.
704 copy_depth_stencil_pixels(GLcontext
*ctx
,
705 const GLint srcX
, const GLint srcY
,
706 const GLint width
, const GLint height
,
707 const GLint destX
, const GLint destY
)
709 struct gl_renderbuffer
*stencilReadRb
, *depthReadRb
, *depthDrawRb
;
712 GLstencil
*tempStencilImage
= NULL
, *stencilPtr
= NULL
;
713 GLfloat
*tempDepthImage
= NULL
, *depthPtr
= NULL
;
714 const GLfloat depthScale
= ctx
->DrawBuffer
->_DepthMaxF
;
715 const GLuint stencilMask
= ctx
->Stencil
.WriteMask
[0];
716 const GLboolean zoom
= ctx
->Pixel
.ZoomX
!= 1.0F
|| ctx
->Pixel
.ZoomY
!= 1.0F
;
717 const GLboolean shiftOrOffset
718 = ctx
->Pixel
.IndexShift
|| ctx
->Pixel
.IndexOffset
;
719 const GLboolean scaleOrBias
720 = ctx
->Pixel
.DepthScale
!= 1.0 || ctx
->Pixel
.DepthBias
!= 0.0;
723 depthDrawRb
= ctx
->DrawBuffer
->Attachment
[BUFFER_DEPTH
].Renderbuffer
;
724 depthReadRb
= ctx
->ReadBuffer
->Attachment
[BUFFER_DEPTH
].Renderbuffer
;
725 stencilReadRb
= ctx
->ReadBuffer
->Attachment
[BUFFER_STENCIL
].Renderbuffer
;
729 ASSERT(stencilReadRb
);
731 /* Determine if copy should be bottom-to-top or top-to-bottom */
733 /* top-down max-to-min */
734 sy
= srcY
+ height
- 1;
735 dy
= destY
+ height
- 1;
739 /* bottom-up min-to-max */
745 if (ctx
->DrawBuffer
== ctx
->ReadBuffer
) {
746 overlapping
= regions_overlap(srcX
, srcY
, destX
, destY
, width
, height
,
747 ctx
->Pixel
.ZoomX
, ctx
->Pixel
.ZoomY
);
750 overlapping
= GL_FALSE
;
756 if (stencilMask
!= 0x0) {
758 = (GLstencil
*) _mesa_malloc(width
* height
* sizeof(GLstencil
));
759 if (!tempStencilImage
) {
760 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glCopyPixels");
764 /* get copy of stencil pixels */
765 stencilPtr
= tempStencilImage
;
766 for (j
= 0; j
< height
; j
++, ssy
+= stepy
) {
767 _swrast_read_stencil_span(ctx
, stencilReadRb
,
768 width
, srcX
, ssy
, stencilPtr
);
771 stencilPtr
= tempStencilImage
;
774 if (ctx
->Depth
.Mask
) {
776 = (GLfloat
*) _mesa_malloc(width
* height
* sizeof(GLfloat
));
777 if (!tempDepthImage
) {
778 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glCopyPixels");
779 _mesa_free(tempStencilImage
);
783 /* get copy of depth pixels */
784 depthPtr
= tempDepthImage
;
785 for (j
= 0; j
< height
; j
++, ssy
+= stepy
) {
786 _swrast_read_depth_span_float(ctx
, depthReadRb
,
787 width
, srcX
, ssy
, depthPtr
);
790 depthPtr
= tempDepthImage
;
794 for (j
= 0; j
< height
; j
++, sy
+= stepy
, dy
+= stepy
) {
795 if (stencilMask
!= 0x0) {
796 GLstencil stencil
[MAX_WIDTH
];
798 /* Get stencil values */
800 _mesa_memcpy(stencil
, stencilPtr
, width
* sizeof(GLstencil
));
804 _swrast_read_stencil_span(ctx
, stencilReadRb
,
805 width
, srcX
, sy
, stencil
);
808 /* Apply shift, offset, look-up table */
810 _mesa_shift_and_offset_stencil(ctx
, width
, stencil
);
812 if (ctx
->Pixel
.MapStencilFlag
) {
813 _mesa_map_stencil(ctx
, width
, stencil
);
818 _swrast_write_zoomed_stencil_span(ctx
, destX
, destY
, width
,
822 _swrast_write_stencil_span( ctx
, width
, destX
, dy
, stencil
);
826 if (ctx
->Depth
.Mask
) {
827 GLfloat depth
[MAX_WIDTH
];
828 GLuint zVals32
[MAX_WIDTH
];
829 GLushort zVals16
[MAX_WIDTH
];
833 /* get depth values */
835 _mesa_memcpy(depth
, depthPtr
, width
* sizeof(GLfloat
));
839 _swrast_read_depth_span_float(ctx
, depthReadRb
,
840 width
, srcX
, sy
, depth
);
845 _mesa_scale_and_bias_depth(ctx
, width
, depth
);
847 /* convert to integer Z values */
848 if (depthDrawRb
->DataType
== GL_UNSIGNED_SHORT
) {
850 for (k
= 0; k
< width
; k
++)
851 zVals16
[k
] = (GLushort
) (depth
[k
] * depthScale
);
857 for (k
= 0; k
< width
; k
++)
858 zVals32
[k
] = (GLuint
) (depth
[k
] * depthScale
);
865 _swrast_write_zoomed_z_span(ctx
, destX
, destY
, width
,
869 _swrast_put_row(ctx
, depthDrawRb
, width
, destX
, dy
, zVals
, zBytes
);
874 if (tempStencilImage
)
875 _mesa_free(tempStencilImage
);
878 _mesa_free(tempDepthImage
);
883 * Do software-based glCopyPixels.
884 * By time we get here, all parameters will have been error-checked.
887 _swrast_CopyPixels( GLcontext
*ctx
,
888 GLint srcx
, GLint srcy
, GLsizei width
, GLsizei height
,
889 GLint destx
, GLint desty
, GLenum type
)
891 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
892 RENDER_START(swrast
,ctx
);
894 if (swrast
->NewState
)
895 _swrast_validate_derived( ctx
);
899 if (ctx
->Visual
.rgbMode
) {
900 copy_rgba_pixels( ctx
, srcx
, srcy
, width
, height
, destx
, desty
);
903 copy_ci_pixels( ctx
, srcx
, srcy
, width
, height
, destx
, desty
);
907 copy_depth_pixels( ctx
, srcx
, srcy
, width
, height
, destx
, desty
);
910 copy_stencil_pixels( ctx
, srcx
, srcy
, width
, height
, destx
, desty
);
912 case GL_DEPTH_STENCIL_EXT
:
913 copy_depth_stencil_pixels(ctx
, srcx
, srcy
, width
, height
, destx
, desty
);
916 _mesa_problem(ctx
, "unexpected type in _swrast_CopyPixels");
919 RENDER_FINISH(swrast
,ctx
);