intel_pixel_bitmap.c revision 3dbba95b72262344b82fba018b7c2c1208754cd2 
1/**************************************************************************
2 *
3 * Copyright 2006 Tungsten Graphics, Inc., Cedar Park, Texas.
4 * All Rights Reserved.
5 *
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:
13 *
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portionsalloc
16 * of the Software.
17 *
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.
25 *
26 **************************************************************************/
27
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"
35#include "main/pbo.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"
43
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"
53
54
55#define FILE_DEBUG_FLAG DEBUG_PIXEL
56
57
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?
64 */
65static const GLubyte *map_pbo( struct gl_context *ctx,
66			       GLsizei width, GLsizei height,
67			       const struct gl_pixelstore_attrib *unpack,
68			       const GLubyte *bitmap )
69{
70   GLubyte *buf;
71
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)");
76      return NULL;
77   }
78
79   buf = (GLubyte *) ctx->Driver.MapBufferRange(ctx, 0, unpack->BufferObj->Size,
80						GL_MAP_READ_BIT,
81						unpack->BufferObj);
82   if (!buf) {
83      _mesa_error(ctx, GL_INVALID_OPERATION, "glBitmap(PBO is mapped)");
84      return NULL;
85   }
86
87   return ADD_POINTERS(buf, bitmap);
88}
89
90static bool test_bit( const GLubyte *src, GLuint bit )
91{
92   return (src[bit/8] & (1<<(bit % 8))) ? 1 : 0;
93}
94
95static void set_bit( GLubyte *dest, GLuint bit )
96{
97   dest[bit/8] |= 1 << (bit % 8);
98}
99
100/* Extract a rectangle's worth of data from the bitmap.  Called
101 * per chunk of HW-sized bitmap.
102 */
103static GLuint get_bitmap_rect(GLsizei width, GLsizei height,
104			      const struct gl_pixelstore_attrib *unpack,
105			      const GLubyte *bitmap,
106			      GLuint x, GLuint y,
107			      GLuint w, GLuint h,
108			      GLubyte *dest,
109			      GLuint row_align,
110			      bool invert)
111{
112   GLuint src_offset = (x + unpack->SkipPixels) & 0x7;
113   GLuint mask = unpack->LsbFirst ? 0 : 7;
114   GLuint bit = 0;
115   GLint row, col;
116   GLint first, last;
117   GLint incr;
118   GLuint count = 0;
119
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);
122
123   if (invert) {
124      first = h-1;
125      last = 0;
126      incr = -1;
127   }
128   else {
129      first = 0;
130      last = h-1;
131      incr = 1;
132   }
133
134   /* Require that dest be pre-zero'd.
135    */
136   for (row = first; row != (last+incr); row += incr) {
137      const GLubyte *rowsrc = _mesa_image_address2d(unpack, bitmap,
138						    width, height,
139						    GL_COLOR_INDEX, GL_BITMAP,
140						    y + row, x);
141
142      for (col = 0; col < w; col++, bit++) {
143	 if (test_bit(rowsrc, (col + src_offset) ^ mask)) {
144	    set_bit(dest, bit ^ 7);
145	    count++;
146	 }
147      }
148
149      if (row_align)
150	 bit = ALIGN(bit, row_align);
151   }
152
153   return count;
154}
155
156/**
157 * Returns the low Y value of the vertical range given, flipped according to
158 * whether the framebuffer is or not.
159 */
160static INLINE int
161y_flip(struct gl_framebuffer *fb, int y, int height)
162{
163   if (_mesa_is_user_fbo(fb))
164      return y;
165   else
166      return fb->Height - y - height;
167}
168
169/*
170 * Render a bitmap.
171 */
172static bool
173do_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 )
178{
179   struct intel_context *intel = intel_context(ctx);
180   struct gl_framebuffer *fb = ctx->DrawBuffer;
181   struct intel_renderbuffer *irb;
182   GLfloat tmpColor[4];
183   GLubyte ubcolor[4];
184   GLuint color;
185   GLsizei bitmap_width = width;
186   GLsizei bitmap_height = height;
187   GLint px, py;
188   GLuint stipple[32];
189   GLint orig_dstx = dstx;
190   GLint orig_dsty = dsty;
191
192   /* Update draw buffer bounds */
193   _mesa_update_state(ctx);
194
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.
199       */
200      return false;
201   }
202
203   intel_prepare_render(intel);
204
205   if (fb->_NumColorDrawBuffers != 1) {
206      perf_debug("accelerated glBitmap() only supports rendering to a "
207                 "single color buffer\n");
208      return false;
209   }
210
211   irb = intel_renderbuffer(fb->_ColorDrawBuffers[0]);
212
213   if (_mesa_is_bufferobj(unpack->BufferObj)) {
214      bitmap = map_pbo(ctx, width, height, unpack, bitmap);
215      if (bitmap == NULL)
216	 return true;	/* even though this is an error, we're done */
217   }
218
219   COPY_4V(tmpColor, ctx->Current.RasterColor);
220
221   if (_mesa_need_secondary_color(ctx)) {
222       ADD_3V(tmpColor, tmpColor, ctx->Current.RasterSecondaryColor);
223   }
224
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]);
229
230   switch (irb->mt->format) {
231   case MESA_FORMAT_ARGB8888:
232   case MESA_FORMAT_XRGB8888:
233      color = PACK_COLOR_8888(ubcolor[3], ubcolor[0], ubcolor[1], ubcolor[2]);
234      break;
235   case MESA_FORMAT_RGB565:
236      color = PACK_COLOR_565(ubcolor[0], ubcolor[1], ubcolor[2]);
237      break;
238   default:
239      perf_debug("Unsupported format %s in accelerated glBitmap()\n",
240                 _mesa_get_format_name(irb->mt->format));
241      return false;
242   }
243
244   if (!intel_check_blit_fragment_ops(ctx, tmpColor[3] == 1.0F))
245      return false;
246
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))
251      goto out;
252
253   dsty = y_flip(fb, dsty, height);
254
255#define DY 32
256#define DX 32
257
258   /* The blitter has no idea about fast color clears, so we need to resolve
259    * the miptree before we do anything.
260    */
261   intel_miptree_resolve_color(intel, irb->mt);
262
263   /* Chop it all into chunks that can be digested by hardware: */
264   for (py = 0; py < height; py += DY) {
265      for (px = 0; px < width; px += DX) {
266	 int h = MIN2(DY, height - py);
267	 int w = MIN2(DX, width - px);
268	 GLuint sz = ALIGN(ALIGN(w,8) * h, 64)/8;
269	 GLenum logic_op = ctx->Color.ColorLogicOpEnabled ?
270	    ctx->Color.LogicOp : GL_COPY;
271
272	 assert(sz <= sizeof(stipple));
273	 memset(stipple, 0, sz);
274
275	 /* May need to adjust this when padding has been introduced in
276	  * sz above:
277	  *
278	  * Have to translate destination coordinates back into source
279	  * coordinates.
280	  */
281         int count = get_bitmap_rect(bitmap_width, bitmap_height, unpack,
282                                     bitmap,
283                                     -orig_dstx + (dstx + px),
284                                     -orig_dsty + y_flip(fb, dsty + py, h),
285                                     w, h,
286                                     (GLubyte *)stipple,
287                                     8,
288                                     _mesa_is_winsys_fbo(fb));
289         if (count == 0)
290	    continue;
291
292	 if (!intelEmitImmediateColorExpandBlit(intel,
293						irb->mt->cpp,
294						(GLubyte *)stipple,
295						sz,
296						color,
297						irb->mt->region->pitch,
298						irb->mt->region->bo,
299						0,
300						irb->mt->region->tiling,
301						dstx + px,
302						dsty + py,
303						w, h,
304						logic_op)) {
305	    return false;
306	 }
307
308         if (ctx->Query.CurrentOcclusionObject)
309            ctx->Query.CurrentOcclusionObject->Result += count;
310      }
311   }
312out:
313
314   if (unlikely(INTEL_DEBUG & DEBUG_SYNC))
315      intel_batchbuffer_flush(intel);
316
317   if (_mesa_is_bufferobj(unpack->BufferObj)) {
318      /* done with PBO so unmap it now */
319      ctx->Driver.UnmapBuffer(ctx, unpack->BufferObj);
320   }
321
322   intel_check_front_buffer_rendering(intel);
323
324   return true;
325}
326
327
328/* There are a large number of possible ways to implement bitmap on
329 * this hardware, most of them have some sort of drawback.  Here are a
330 * few that spring to mind:
331 *
332 * Blit:
333 *    - XY_MONO_SRC_BLT_CMD
334 *         - use XY_SETUP_CLIP_BLT for cliprect clipping.
335 *    - XY_TEXT_BLT
336 *    - XY_TEXT_IMMEDIATE_BLT
337 *         - blit per cliprect, subject to maximum immediate data size.
338 *    - XY_COLOR_BLT
339 *         - per pixel or run of pixels
340 *    - XY_PIXEL_BLT
341 *         - good for sparse bitmaps
342 *
343 * 3D engine:
344 *    - Point per pixel
345 *    - Translate bitmap to an alpha texture and render as a quad
346 *    - Chop bitmap up into 32x32 squares and render w/polygon stipple.
347 */
348void
349intelBitmap(struct gl_context * ctx,
350	    GLint x, GLint y,
351	    GLsizei width, GLsizei height,
352	    const struct gl_pixelstore_attrib *unpack,
353	    const GLubyte * pixels)
354{
355   if (!_mesa_check_conditional_render(ctx))
356      return;
357
358   if (do_blit_bitmap(ctx, x, y, width, height,
359                          unpack, pixels))
360      return;
361
362   _mesa_meta_Bitmap(ctx, x, y, width, height, unpack, pixels);
363}
364