2 * Mesa 3-D graphics library
5 * Copyright (C) 1999-2007 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.
26 #include "main/glheader.h"
27 #include "main/bufferobj.h"
28 #include "main/context.h"
29 #include "main/convolve.h"
30 #include "main/image.h"
31 #include "main/macros.h"
32 #include "main/imports.h"
33 #include "main/pixel.h"
34 #include "main/state.h"
36 #include "s_context.h"
38 #include "s_stencil.h"
44 * Try to do a fast and simple RGB(a) glDrawPixels.
45 * Return: GL_TRUE if success, GL_FALSE if slow path must be used instead
48 fast_draw_rgba_pixels(GLcontext
*ctx
, GLint x
, GLint y
,
49 GLsizei width
, GLsizei height
,
50 GLenum format
, GLenum type
,
51 const struct gl_pixelstore_attrib
*userUnpack
,
54 const GLint imgX
= x
, imgY
= y
;
55 struct gl_renderbuffer
*rb
= ctx
->DrawBuffer
->_ColorDrawBuffers
[0];
57 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
60 GLint yStep
; /* +1 or -1 */
61 struct gl_pixelstore_attrib unpack
;
62 GLint destX
, destY
, drawWidth
, drawHeight
; /* post clipping */
65 return GL_TRUE
; /* no-op */
67 rbType
= rb
->DataType
;
69 if ((swrast
->_RasterMask
& ~CLIP_BIT
) ||
70 ctx
->Texture
._EnabledCoordUnits
||
71 userUnpack
->SwapBytes
||
72 ctx
->_ImageTransferState
) {
73 /* can't handle any of those conditions */
77 INIT_SPAN(span
, GL_BITMAP
);
78 span
.arrayMask
= SPAN_RGBA
;
79 span
.arrayAttribs
= FRAG_BIT_COL0
;
80 _swrast_span_default_attribs(ctx
, &span
);
82 /* copy input params since clipping may change them */
89 /* check for simple zooming and clipping */
90 if (ctx
->Pixel
.ZoomX
== 1.0F
&&
91 (ctx
->Pixel
.ZoomY
== 1.0F
|| ctx
->Pixel
.ZoomY
== -1.0F
)) {
92 if (!_mesa_clip_drawpixels(ctx
, &destX
, &destY
,
93 &drawWidth
, &drawHeight
, &unpack
)) {
94 /* image was completely clipped: no-op, all done */
98 yStep
= (GLint
) ctx
->Pixel
.ZoomY
;
99 ASSERT(yStep
== 1 || yStep
== -1);
102 /* non-simple zooming */
103 simpleZoom
= GL_FALSE
;
105 if (unpack
.RowLength
== 0)
106 unpack
.RowLength
= width
;
113 if (format
== GL_RGBA
&& type
== rbType
) {
115 = (const GLubyte
*) _mesa_image_address2d(&unpack
, pixels
, width
,
116 height
, format
, type
, 0, 0);
117 const GLint srcStride
= _mesa_image_row_stride(&unpack
, width
,
121 for (row
= 0; row
< drawHeight
; row
++) {
122 rb
->PutRow(ctx
, rb
, drawWidth
, destX
, destY
, src
, NULL
);
130 for (row
= 0; row
< drawHeight
; row
++) {
132 span
.y
= destY
+ row
;
133 span
.end
= drawWidth
;
134 span
.array
->ChanType
= rbType
;
135 _swrast_write_zoomed_rgba_span(ctx
, imgX
, imgY
, &span
, src
);
138 span
.array
->ChanType
= CHAN_TYPE
;
143 if (format
== GL_RGB
&& type
== rbType
) {
145 = (const GLubyte
*) _mesa_image_address2d(&unpack
, pixels
, width
,
146 height
, format
, type
, 0, 0);
147 const GLint srcStride
= _mesa_image_row_stride(&unpack
, width
,
151 for (row
= 0; row
< drawHeight
; row
++) {
152 rb
->PutRowRGB(ctx
, rb
, drawWidth
, destX
, destY
, src
, NULL
);
160 for (row
= 0; row
< drawHeight
; row
++) {
163 span
.end
= drawWidth
;
164 span
.array
->ChanType
= rbType
;
165 _swrast_write_zoomed_rgb_span(ctx
, imgX
, imgY
, &span
, src
);
169 span
.array
->ChanType
= CHAN_TYPE
;
174 /* Remaining cases haven't been tested with alignment != 1 */
175 if (userUnpack
->Alignment
!= 1)
178 if (format
== GL_LUMINANCE
&& type
== CHAN_TYPE
&& rbType
== CHAN_TYPE
) {
179 const GLchan
*src
= (const GLchan
*) pixels
180 + (unpack
.SkipRows
* unpack
.RowLength
+ unpack
.SkipPixels
);
184 ASSERT(drawWidth
<= MAX_WIDTH
);
185 for (row
= 0; row
< drawHeight
; row
++) {
186 GLchan rgb
[MAX_WIDTH
][3];
188 for (i
= 0;i
<drawWidth
;i
++) {
193 rb
->PutRowRGB(ctx
, rb
, drawWidth
, destX
, destY
, rgb
, NULL
);
194 src
+= unpack
.RowLength
;
201 ASSERT(drawWidth
<= MAX_WIDTH
);
202 for (row
= 0; row
< drawHeight
; row
++) {
203 GLchan rgb
[MAX_WIDTH
][3];
205 for (i
= 0;i
<drawWidth
;i
++) {
212 span
.end
= drawWidth
;
213 _swrast_write_zoomed_rgb_span(ctx
, imgX
, imgY
, &span
, rgb
);
214 src
+= unpack
.RowLength
;
221 if (format
== GL_LUMINANCE_ALPHA
&& type
== CHAN_TYPE
&& rbType
== CHAN_TYPE
) {
222 const GLchan
*src
= (const GLchan
*) pixels
223 + (unpack
.SkipRows
* unpack
.RowLength
+ unpack
.SkipPixels
)*2;
226 ASSERT(drawWidth
<= MAX_WIDTH
);
227 for (row
= 0; row
< drawHeight
; row
++) {
229 const GLchan
*ptr
= src
;
230 for (i
= 0;i
<drawWidth
;i
++) {
231 span
.array
->rgba
[i
][0] = *ptr
;
232 span
.array
->rgba
[i
][1] = *ptr
;
233 span
.array
->rgba
[i
][2] = *ptr
++;
234 span
.array
->rgba
[i
][3] = *ptr
++;
236 rb
->PutRow(ctx
, rb
, drawWidth
, destX
, destY
,
237 span
.array
->rgba
, NULL
);
238 src
+= unpack
.RowLength
*2;
245 ASSERT(drawWidth
<= MAX_WIDTH
);
246 for (row
= 0; row
< drawHeight
; row
++) {
247 const GLchan
*ptr
= src
;
249 for (i
= 0;i
<drawWidth
;i
++) {
250 span
.array
->rgba
[i
][0] = *ptr
;
251 span
.array
->rgba
[i
][1] = *ptr
;
252 span
.array
->rgba
[i
][2] = *ptr
++;
253 span
.array
->rgba
[i
][3] = *ptr
++;
257 span
.end
= drawWidth
;
258 _swrast_write_zoomed_rgba_span(ctx
, imgX
, imgY
, &span
,
260 src
+= unpack
.RowLength
*2;
267 if (format
== GL_COLOR_INDEX
&& type
== GL_UNSIGNED_BYTE
) {
268 const GLubyte
*src
= (const GLubyte
*) pixels
269 + unpack
.SkipRows
* unpack
.RowLength
+ unpack
.SkipPixels
;
270 if (ctx
->Visual
.rgbMode
&& rbType
== GL_UNSIGNED_BYTE
) {
271 /* convert ubyte/CI data to ubyte/RGBA */
274 for (row
= 0; row
< drawHeight
; row
++) {
275 ASSERT(drawWidth
<= MAX_WIDTH
);
276 _mesa_map_ci8_to_rgba8(ctx
, drawWidth
, src
,
278 rb
->PutRow(ctx
, rb
, drawWidth
, destX
, destY
,
279 span
.array
->rgba8
, NULL
);
280 src
+= unpack
.RowLength
;
285 /* ubyte/CI to ubyte/RGBA with zooming */
287 for (row
= 0; row
< drawHeight
; row
++) {
288 ASSERT(drawWidth
<= MAX_WIDTH
);
289 _mesa_map_ci8_to_rgba8(ctx
, drawWidth
, src
,
293 span
.end
= drawWidth
;
294 _swrast_write_zoomed_rgba_span(ctx
, imgX
, imgY
, &span
,
296 src
+= unpack
.RowLength
;
302 else if (!ctx
->Visual
.rgbMode
&& rbType
== GL_UNSIGNED_INT
) {
303 /* write CI data to CI frame buffer */
306 for (row
= 0; row
< drawHeight
; row
++) {
307 GLuint index32
[MAX_WIDTH
];
309 for (col
= 0; col
< drawWidth
; col
++)
310 index32
[col
] = src
[col
];
311 rb
->PutRow(ctx
, rb
, drawWidth
, destX
, destY
, index32
, NULL
);
312 src
+= unpack
.RowLength
;
320 /* can't handle this pixel format and/or data type */
327 * Draw color index image.
330 draw_index_pixels( GLcontext
*ctx
, GLint x
, GLint y
,
331 GLsizei width
, GLsizei height
,
333 const struct gl_pixelstore_attrib
*unpack
,
334 const GLvoid
*pixels
)
336 const GLint imgX
= x
, imgY
= y
;
337 const GLboolean zoom
= ctx
->Pixel
.ZoomX
!=1.0 || ctx
->Pixel
.ZoomY
!=1.0;
338 GLint row
, skipPixels
;
341 INIT_SPAN(span
, GL_BITMAP
);
342 span
.arrayMask
= SPAN_INDEX
;
343 _swrast_span_default_attribs(ctx
, &span
);
349 while (skipPixels
< width
) {
350 const GLint spanWidth
= MIN2(width
- skipPixels
, MAX_WIDTH
);
351 ASSERT(spanWidth
<= MAX_WIDTH
);
352 for (row
= 0; row
< height
; row
++) {
353 const GLvoid
*source
= _mesa_image_address2d(unpack
, pixels
,
355 GL_COLOR_INDEX
, type
,
357 _mesa_unpack_index_span(ctx
, spanWidth
, GL_UNSIGNED_INT
,
358 span
.array
->index
, type
, source
, unpack
,
359 ctx
->_ImageTransferState
);
361 /* These may get changed during writing/clipping */
362 span
.x
= x
+ skipPixels
;
364 span
.end
= spanWidth
;
367 _swrast_write_zoomed_index_span(ctx
, imgX
, imgY
, &span
);
369 _swrast_write_index_span(ctx
, &span
);
371 skipPixels
+= spanWidth
;
378 * Draw stencil image.
381 draw_stencil_pixels( GLcontext
*ctx
, GLint x
, GLint y
,
382 GLsizei width
, GLsizei height
,
384 const struct gl_pixelstore_attrib
*unpack
,
385 const GLvoid
*pixels
)
387 const GLboolean zoom
= ctx
->Pixel
.ZoomX
!= 1.0 || ctx
->Pixel
.ZoomY
!= 1.0;
390 /* if width > MAX_WIDTH, have to process image in chunks */
392 while (skipPixels
< width
) {
393 const GLint spanX
= x
+ skipPixels
;
394 const GLint spanWidth
= MIN2(width
- skipPixels
, MAX_WIDTH
);
396 for (row
= 0; row
< height
; row
++) {
397 const GLint spanY
= y
+ row
;
398 GLstencil values
[MAX_WIDTH
];
399 GLenum destType
= (sizeof(GLstencil
) == sizeof(GLubyte
))
400 ? GL_UNSIGNED_BYTE
: GL_UNSIGNED_SHORT
;
401 const GLvoid
*source
= _mesa_image_address2d(unpack
, pixels
,
403 GL_COLOR_INDEX
, type
,
405 _mesa_unpack_stencil_span(ctx
, spanWidth
, destType
, values
,
406 type
, source
, unpack
,
407 ctx
->_ImageTransferState
);
409 _swrast_write_zoomed_stencil_span(ctx
, x
, y
, spanWidth
,
410 spanX
, spanY
, values
);
413 _swrast_write_stencil_span(ctx
, spanWidth
, spanX
, spanY
, values
);
416 skipPixels
+= spanWidth
;
425 draw_depth_pixels( GLcontext
*ctx
, GLint x
, GLint y
,
426 GLsizei width
, GLsizei height
,
428 const struct gl_pixelstore_attrib
*unpack
,
429 const GLvoid
*pixels
)
431 const GLboolean scaleOrBias
432 = ctx
->Pixel
.DepthScale
!= 1.0 || ctx
->Pixel
.DepthBias
!= 0.0;
433 const GLboolean zoom
= ctx
->Pixel
.ZoomX
!= 1.0 || ctx
->Pixel
.ZoomY
!= 1.0;
436 INIT_SPAN(span
, GL_BITMAP
);
437 span
.arrayMask
= SPAN_Z
;
438 _swrast_span_default_attribs(ctx
, &span
);
440 if (type
== GL_UNSIGNED_SHORT
441 && ctx
->DrawBuffer
->Visual
.depthBits
== 16
444 && ctx
->Visual
.rgbMode
445 && width
<= MAX_WIDTH
446 && !unpack
->SwapBytes
) {
447 /* Special case: directly write 16-bit depth values */
449 for (row
= 0; row
< height
; row
++) {
450 const GLushort
*zSrc
= (const GLushort
*)
451 _mesa_image_address2d(unpack
, pixels
, width
, height
,
452 GL_DEPTH_COMPONENT
, type
, row
, 0);
454 for (i
= 0; i
< width
; i
++)
455 span
.array
->z
[i
] = zSrc
[i
];
459 _swrast_write_rgba_span(ctx
, &span
);
462 else if (type
== GL_UNSIGNED_INT
465 && ctx
->Visual
.rgbMode
466 && width
<= MAX_WIDTH
467 && !unpack
->SwapBytes
) {
468 /* Special case: shift 32-bit values down to Visual.depthBits */
469 const GLint shift
= 32 - ctx
->DrawBuffer
->Visual
.depthBits
;
471 for (row
= 0; row
< height
; row
++) {
472 const GLuint
*zSrc
= (const GLuint
*)
473 _mesa_image_address2d(unpack
, pixels
, width
, height
,
474 GL_DEPTH_COMPONENT
, type
, row
, 0);
476 _mesa_memcpy(span
.array
->z
, zSrc
, width
* sizeof(GLuint
));
480 for (col
= 0; col
< width
; col
++)
481 span
.array
->z
[col
] = zSrc
[col
] >> shift
;
486 _swrast_write_rgba_span(ctx
, &span
);
491 const GLuint depthMax
= ctx
->DrawBuffer
->_DepthMax
;
492 GLint skipPixels
= 0;
494 /* in case width > MAX_WIDTH do the copy in chunks */
495 while (skipPixels
< width
) {
496 const GLint spanWidth
= MIN2(width
- skipPixels
, MAX_WIDTH
);
498 ASSERT(span
.end
<= MAX_WIDTH
);
499 for (row
= 0; row
< height
; row
++) {
500 const GLvoid
*zSrc
= _mesa_image_address2d(unpack
,
501 pixels
, width
, height
,
502 GL_DEPTH_COMPONENT
, type
,
505 /* Set these for each row since the _swrast_write_* function may
506 * change them while clipping.
508 span
.x
= x
+ skipPixels
;
510 span
.end
= spanWidth
;
512 _mesa_unpack_depth_span(ctx
, spanWidth
,
513 GL_UNSIGNED_INT
, span
.array
->z
, depthMax
,
516 _swrast_write_zoomed_depth_span(ctx
, x
, y
, &span
);
518 else if (ctx
->Visual
.rgbMode
) {
519 _swrast_write_rgba_span(ctx
, &span
);
522 _swrast_write_index_span(ctx
, &span
);
525 skipPixels
+= spanWidth
;
536 draw_rgba_pixels( GLcontext
*ctx
, GLint x
, GLint y
,
537 GLsizei width
, GLsizei height
,
538 GLenum format
, GLenum type
,
539 const struct gl_pixelstore_attrib
*unpack
,
540 const GLvoid
*pixels
)
542 const GLint imgX
= x
, imgY
= y
;
543 const GLboolean zoom
= ctx
->Pixel
.ZoomX
!=1.0 || ctx
->Pixel
.ZoomY
!=1.0;
544 GLfloat
*convImage
= NULL
;
545 GLbitfield transferOps
= ctx
->_ImageTransferState
;
548 /* Try an optimized glDrawPixels first */
549 if (fast_draw_rgba_pixels(ctx
, x
, y
, width
, height
, format
, type
,
554 INIT_SPAN(span
, GL_BITMAP
);
555 _swrast_span_default_attribs(ctx
, &span
);
556 span
.arrayMask
= SPAN_RGBA
;
557 span
.arrayAttribs
= FRAG_BIT_COL0
; /* we're fill in COL0 attrib values */
559 if (ctx
->Pixel
.Convolution2DEnabled
|| ctx
->Pixel
.Separable2DEnabled
) {
560 /* Convolution has to be handled specially. We'll create an
561 * intermediate image, applying all pixel transfer operations
562 * up to convolution. Then we'll convolve the image. Then
563 * we'll proceed with the rest of the transfer operations and
564 * rasterize the image.
567 GLfloat
*dest
, *tmpImage
;
569 tmpImage
= (GLfloat
*) _mesa_malloc(width
* height
* 4 * sizeof(GLfloat
));
571 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glDrawPixels");
574 convImage
= (GLfloat
*) _mesa_malloc(width
* height
* 4 * sizeof(GLfloat
));
576 _mesa_free(tmpImage
);
577 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glDrawPixels");
581 /* Unpack the image and apply transfer ops up to convolution */
583 for (row
= 0; row
< height
; row
++) {
584 const GLvoid
*source
= _mesa_image_address2d(unpack
,
585 pixels
, width
, height
, format
, type
, row
, 0);
586 _mesa_unpack_color_span_float(ctx
, width
, GL_RGBA
, (GLfloat
*) dest
,
587 format
, type
, source
, unpack
,
588 transferOps
& IMAGE_PRE_CONVOLUTION_BITS
);
593 if (ctx
->Pixel
.Convolution2DEnabled
) {
594 _mesa_convolve_2d_image(ctx
, &width
, &height
, tmpImage
, convImage
);
597 ASSERT(ctx
->Pixel
.Separable2DEnabled
);
598 _mesa_convolve_sep_image(ctx
, &width
, &height
, tmpImage
, convImage
);
600 _mesa_free(tmpImage
);
602 /* continue transfer ops and draw the convolved image */
603 unpack
= &ctx
->DefaultPacking
;
607 transferOps
&= IMAGE_POST_CONVOLUTION_BITS
;
609 else if (ctx
->Pixel
.Convolution1DEnabled
) {
610 /* we only want to apply 1D convolution to glTexImage1D */
611 transferOps
&= ~(IMAGE_CONVOLUTION_BIT
|
612 IMAGE_POST_CONVOLUTION_SCALE_BIAS
);
615 if (ctx
->DrawBuffer
->_NumColorDrawBuffers
> 0 &&
616 ctx
->DrawBuffer
->_ColorDrawBuffers
[0]->DataType
!= GL_FLOAT
&&
617 ctx
->Color
.ClampFragmentColor
!= GL_FALSE
) {
618 /* need to clamp colors before applying fragment ops */
619 transferOps
|= IMAGE_CLAMP_BIT
;
626 const GLboolean sink
= (ctx
->Pixel
.MinMaxEnabled
&& ctx
->MinMax
.Sink
)
627 || (ctx
->Pixel
.HistogramEnabled
&& ctx
->Histogram
.Sink
);
628 const GLbitfield interpMask
= span
.interpMask
;
629 const GLbitfield arrayMask
= span
.arrayMask
;
630 const GLint srcStride
631 = _mesa_image_row_stride(unpack
, width
, format
, type
);
632 GLint skipPixels
= 0;
633 /* use span array for temp color storage */
634 GLfloat
*rgba
= (GLfloat
*) span
.array
->attribs
[FRAG_ATTRIB_COL0
];
636 /* if the span is wider than MAX_WIDTH we have to do it in chunks */
637 while (skipPixels
< width
) {
638 const GLint spanWidth
= MIN2(width
- skipPixels
, MAX_WIDTH
);
639 const GLubyte
*source
640 = (const GLubyte
*) _mesa_image_address2d(unpack
, pixels
,
641 width
, height
, format
,
642 type
, 0, skipPixels
);
645 for (row
= 0; row
< height
; row
++) {
646 /* get image row as float/RGBA */
647 _mesa_unpack_color_span_float(ctx
, spanWidth
, GL_RGBA
, rgba
,
648 format
, type
, source
, unpack
,
652 /* Set these for each row since the _swrast_write_* functions
653 * may change them while clipping/rendering.
655 span
.array
->ChanType
= GL_FLOAT
;
656 span
.x
= x
+ skipPixels
;
658 span
.end
= spanWidth
;
659 span
.arrayMask
= arrayMask
;
660 span
.interpMask
= interpMask
;
662 _swrast_write_zoomed_rgba_span(ctx
, imgX
, imgY
, &span
, rgba
);
665 _swrast_write_rgba_span(ctx
, &span
);
672 skipPixels
+= spanWidth
;
673 } /* while skipPixels < width */
675 /* XXX this is ugly/temporary, to undo above change */
676 span
.array
->ChanType
= CHAN_TYPE
;
680 _mesa_free(convImage
);
686 * This is a bit different from drawing GL_DEPTH_COMPONENT pixels.
687 * The only per-pixel operations that apply are depth scale/bias,
688 * stencil offset/shift, GL_DEPTH_WRITEMASK and GL_STENCIL_WRITEMASK,
690 * Also, only the depth buffer and stencil buffers are touched, not the
694 draw_depth_stencil_pixels(GLcontext
*ctx
, GLint x
, GLint y
,
695 GLsizei width
, GLsizei height
, GLenum type
,
696 const struct gl_pixelstore_attrib
*unpack
,
697 const GLvoid
*pixels
)
699 const GLint imgX
= x
, imgY
= y
;
700 const GLboolean scaleOrBias
701 = ctx
->Pixel
.DepthScale
!= 1.0 || ctx
->Pixel
.DepthBias
!= 0.0;
702 const GLuint depthMax
= ctx
->DrawBuffer
->_DepthMax
;
703 const GLuint stencilMask
= ctx
->Stencil
.WriteMask
[0];
704 const GLuint stencilType
= (STENCIL_BITS
== 8) ?
705 GL_UNSIGNED_BYTE
: GL_UNSIGNED_SHORT
;
706 const GLboolean zoom
= ctx
->Pixel
.ZoomX
!= 1.0 || ctx
->Pixel
.ZoomY
!= 1.0;
707 struct gl_renderbuffer
*depthRb
, *stencilRb
;
708 struct gl_pixelstore_attrib clippedUnpack
= *unpack
;
711 if (!_mesa_clip_drawpixels(ctx
, &x
, &y
, &width
, &height
,
713 /* totally clipped */
718 depthRb
= ctx
->ReadBuffer
->Attachment
[BUFFER_DEPTH
].Renderbuffer
;
719 stencilRb
= ctx
->ReadBuffer
->Attachment
[BUFFER_STENCIL
].Renderbuffer
;
723 if (depthRb
->_BaseFormat
== GL_DEPTH_STENCIL_EXT
&&
724 stencilRb
->_BaseFormat
== GL_DEPTH_STENCIL_EXT
&&
725 depthRb
== stencilRb
&&
729 (stencilMask
& 0xff) == 0xff) {
730 /* This is the ideal case.
731 * Drawing GL_DEPTH_STENCIL pixels into a combined depth/stencil buffer.
732 * Plus, no pixel transfer ops, zooming, or masking needed.
735 for (i
= 0; i
< height
; i
++) {
736 const GLuint
*src
= (const GLuint
*)
737 _mesa_image_address2d(&clippedUnpack
, pixels
, width
, height
,
738 GL_DEPTH_STENCIL_EXT
, type
, i
, 0);
739 depthRb
->PutRow(ctx
, depthRb
, width
, x
, y
+ i
, src
, NULL
);
743 /* sub-optimal cases:
744 * Separate depth/stencil buffers, or pixel transfer ops required.
746 /* XXX need to handle very wide images (skippixels) */
749 depthRb
= ctx
->DrawBuffer
->_DepthBuffer
;
750 stencilRb
= ctx
->DrawBuffer
->_StencilBuffer
;
752 for (i
= 0; i
< height
; i
++) {
753 const GLuint
*depthStencilSrc
= (const GLuint
*)
754 _mesa_image_address2d(&clippedUnpack
, pixels
, width
, height
,
755 GL_DEPTH_STENCIL_EXT
, type
, i
, 0);
757 if (ctx
->Depth
.Mask
) {
758 if (!scaleOrBias
&& ctx
->DrawBuffer
->Visual
.depthBits
== 24) {
759 /* fast path 24-bit zbuffer */
760 GLuint zValues
[MAX_WIDTH
];
762 ASSERT(depthRb
->DataType
== GL_UNSIGNED_INT
);
763 for (j
= 0; j
< width
; j
++) {
764 zValues
[j
] = depthStencilSrc
[j
] >> 8;
767 _swrast_write_zoomed_z_span(ctx
, imgX
, imgY
, width
,
770 depthRb
->PutRow(ctx
, depthRb
, width
, x
, y
+ i
, zValues
,NULL
);
772 else if (!scaleOrBias
&& ctx
->DrawBuffer
->Visual
.depthBits
== 16) {
773 /* fast path 16-bit zbuffer */
774 GLushort zValues
[MAX_WIDTH
];
776 ASSERT(depthRb
->DataType
== GL_UNSIGNED_SHORT
);
777 for (j
= 0; j
< width
; j
++) {
778 zValues
[j
] = depthStencilSrc
[j
] >> 16;
781 _swrast_write_zoomed_z_span(ctx
, imgX
, imgY
, width
,
784 depthRb
->PutRow(ctx
, depthRb
, width
, x
, y
+ i
, zValues
,NULL
);
788 GLuint zValues
[MAX_WIDTH
]; /* 16 or 32-bit Z value storage */
789 _mesa_unpack_depth_span(ctx
, width
,
790 depthRb
->DataType
, zValues
, depthMax
,
791 type
, depthStencilSrc
, &clippedUnpack
);
793 _swrast_write_zoomed_z_span(ctx
, imgX
, imgY
, width
, x
,
797 depthRb
->PutRow(ctx
, depthRb
, width
, x
, y
+ i
, zValues
,NULL
);
802 if (stencilMask
!= 0x0) {
803 GLstencil stencilValues
[MAX_WIDTH
];
804 /* get stencil values, with shift/offset/mapping */
805 _mesa_unpack_stencil_span(ctx
, width
, stencilType
, stencilValues
,
806 type
, depthStencilSrc
, &clippedUnpack
,
807 ctx
->_ImageTransferState
);
809 _swrast_write_zoomed_stencil_span(ctx
, imgX
, imgY
, width
,
810 x
, y
+ i
, stencilValues
);
812 _swrast_write_stencil_span(ctx
, width
, x
, y
+ i
, stencilValues
);
820 * Execute software-based glDrawPixels.
821 * By time we get here, all error checking will have been done.
824 _swrast_DrawPixels( GLcontext
*ctx
,
826 GLsizei width
, GLsizei height
,
827 GLenum format
, GLenum type
,
828 const struct gl_pixelstore_attrib
*unpack
,
829 const GLvoid
*pixels
)
831 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
833 RENDER_START(swrast
,ctx
);
836 _mesa_update_state(ctx
);
838 if (swrast
->NewState
)
839 _swrast_validate_derived( ctx
);
841 pixels
= _mesa_map_drawpix_pbo(ctx
, unpack
, pixels
);
843 RENDER_FINISH(swrast
,ctx
);
848 case GL_STENCIL_INDEX
:
849 draw_stencil_pixels( ctx
, x
, y
, width
, height
, type
, unpack
, pixels
);
851 case GL_DEPTH_COMPONENT
:
852 draw_depth_pixels( ctx
, x
, y
, width
, height
, type
, unpack
, pixels
);
855 if (ctx
->Visual
.rgbMode
)
856 draw_rgba_pixels(ctx
, x
,y
, width
, height
, format
, type
, unpack
, pixels
);
858 draw_index_pixels(ctx
, x
, y
, width
, height
, type
, unpack
, pixels
);
865 case GL_LUMINANCE_ALPHA
:
871 draw_rgba_pixels(ctx
, x
, y
, width
, height
, format
, type
, unpack
, pixels
);
873 case GL_DEPTH_STENCIL_EXT
:
874 draw_depth_stencil_pixels(ctx
, x
, y
, width
, height
,
875 type
, unpack
, pixels
);
878 _mesa_problem(ctx
, "unexpected format in _swrast_DrawPixels");
879 /* don't return yet, clean-up */
882 RENDER_FINISH(swrast
,ctx
);
884 _mesa_unmap_drapix_pbo(ctx
, unpack
);
889 #if 0 /* experimental */
891 * Execute glDrawDepthPixelsMESA().
894 _swrast_DrawDepthPixelsMESA( GLcontext
*ctx
,
896 GLsizei width
, GLsizei height
,
897 GLenum colorFormat
, GLenum colorType
,
898 const GLvoid
*colors
,
899 GLenum depthType
, const GLvoid
*depths
,
900 const struct gl_pixelstore_attrib
*unpack
)
902 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
904 if (swrast
->NewState
)
905 _swrast_validate_derived( ctx
);
907 RENDER_START(swrast
,ctx
);
909 switch (colorFormat
) {
911 if (ctx
->Visual
.rgbMode
)
912 draw_rgba_pixels(ctx
, x
,y
, width
, height
, colorFormat
, colorType
,
915 draw_index_pixels(ctx
, x
, y
, width
, height
, colorType
,
923 case GL_LUMINANCE_ALPHA
:
929 draw_rgba_pixels(ctx
, x
, y
, width
, height
, colorFormat
, colorType
,
933 _mesa_problem(ctx
, "unexpected format in glDrawDepthPixelsMESA");
936 RENDER_FINISH(swrast
,ctx
);