1 /*
2 * Copyright 2006 VMware, Inc.
3 * All Rights Reserved.
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the
7 * "Software"), to deal in the Software without restriction, including
8 * without limitation the rights to use, copy, modify, merge, publish,
9 * distribute, sublicense, and/or sell copies of the Software, and to
10 * permit persons to whom the Software is furnished to do so, subject to
11 * the following conditions:
12 *
13 * The above copyright notice and this permission notice (including the
14 * next paragraph) shall be included in all copies or substantial portionsalloc
15 * of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
20 * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
21 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
22 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
23 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
24 */
25
26 #include "main/blend.h"
27 #include "main/enums.h"
28 #include "main/image.h"
29 #include "main/colormac.h"
30 #include "main/condrender.h"
31 #include "main/mtypes.h"
32 #include "main/macros.h"
33 #include "main/pbo.h"
34 #include "main/bufferobj.h"
35 #include "main/state.h"
36 #include "main/texobj.h"
37 #include "main/context.h"
38 #include "main/fbobject.h"
39 #include "swrast/swrast.h"
40 #include "drivers/common/meta.h"
41
42 #include "brw_context.h"
43 #include "brw_screen.h"
44 #include "brw_batch.h"
45 #include "brw_blit.h"
46 #include "brw_fbo.h"
47 #include "brw_image.h"
48 #include "brw_buffers.h"
49 #include "brw_pixel.h"
50
51
52 #define FILE_DEBUG_FLAG DEBUG_PIXEL
53
54
55 /* Unlike the other intel_pixel_* functions, the expectation here is
56 * that the incoming data is not in a PBO. With the XY_TEXT blit
57 * method, there's no benefit haveing it in a PBO, but we could
58 * implement a path based on XY_MONO_SRC_COPY_BLIT which might benefit
59 * PBO bitmaps. I think they are probably pretty rare though - I
60 * wonder if Xgl uses them?
61 */
62 static const GLubyte *
map_pbo(struct gl_context * ctx,GLsizei width,GLsizei height,const struct gl_pixelstore_attrib * unpack,const GLubyte * bitmap)63 map_pbo(struct gl_context *ctx,
64 GLsizei width, GLsizei height,
65 const struct gl_pixelstore_attrib *unpack,
66 const GLubyte *bitmap)
67 {
68 GLubyte *buf;
69
70 if (!_mesa_validate_pbo_access(2, unpack, width, height, 1,
71 GL_COLOR_INDEX, GL_BITMAP,
72 INT_MAX, (const GLvoid *) bitmap)) {
73 _mesa_error(ctx, GL_INVALID_OPERATION,"glBitmap(invalid PBO access)");
74 return NULL;
75 }
76
77 buf = (GLubyte *) ctx->Driver.MapBufferRange(ctx, 0, unpack->BufferObj->Size,
78 GL_MAP_READ_BIT,
79 unpack->BufferObj,
80 MAP_INTERNAL);
81 if (!buf) {
82 _mesa_error(ctx, GL_INVALID_OPERATION, "glBitmap(PBO is mapped)");
83 return NULL;
84 }
85
86 return ADD_POINTERS(buf, bitmap);
87 }
88
test_bit(const GLubyte * src,GLuint bit)89 static bool test_bit( const GLubyte *src, GLuint bit )
90 {
91 return (src[bit/8] & (1<<(bit % 8))) ? 1 : 0;
92 }
93
set_bit(GLubyte * dest,GLuint bit)94 static void set_bit( GLubyte *dest, GLuint bit )
95 {
96 dest[bit/8] |= 1 << (bit % 8);
97 }
98
99 /* Extract a rectangle's worth of data from the bitmap. Called
100 * per chunk of HW-sized bitmap.
101 */
102 static GLuint
get_bitmap_rect(GLsizei width,GLsizei height,const struct gl_pixelstore_attrib * unpack,const GLubyte * bitmap,GLuint x,GLuint y,GLuint w,GLuint h,GLubyte * dest,GLuint row_align,bool invert)103 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 __func__, 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 */
160 static inline int
y_flip(struct gl_framebuffer * fb,int y,int height)161 y_flip(struct gl_framebuffer *fb, int y, int height)
162 {
163 if (fb->FlipY)
164 return fb->Height - y - height;
165 else
166 return y;
167 }
168
169 /*
170 * Render a bitmap.
171 */
172 static bool
do_blit_bitmap(struct gl_context * ctx,GLint dstx,GLint dsty,GLsizei width,GLsizei height,const struct gl_pixelstore_attrib * unpack,const GLubyte * bitmap)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)
178 {
179 struct brw_context *brw = brw_context(ctx);
180 struct gl_framebuffer *fb = ctx->DrawBuffer;
181 struct brw_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 brw_prepare_render(brw);
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 = brw_renderbuffer(fb->_ColorDrawBuffers[0]);
212
213 if (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 (_mesa_get_render_format(ctx, brw_rb_format(irb))) {
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]);
234 break;
235 case MESA_FORMAT_B5G6R5_UNORM:
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 (!brw_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 brw_miptree_access_raw(brw, irb->mt, irb->mt_level, irb->mt_layer, true);
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 const enum gl_logicop_mode logic_op = ctx->Color.ColorLogicOpEnabled ?
270 ctx->Color._LogicOp : COLOR_LOGICOP_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 fb->FlipY);
289 if (count == 0)
290 continue;
291
292 if (!brw_emit_immediate_color_expand_blit(brw,
293 irb->mt->cpp,
294 (GLubyte *)stipple,
295 sz,
296 color,
297 irb->mt->surf.row_pitch_B,
298 irb->mt->bo,
299 irb->mt->offset,
300 irb->mt->surf.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 }
312 out:
313
314 if (INTEL_DEBUG(DEBUG_SYNC))
315 brw_batch_flush(brw);
316
317 if (unpack->BufferObj) {
318 /* done with PBO so unmap it now */
319 ctx->Driver.UnmapBuffer(ctx, unpack->BufferObj, MAP_INTERNAL);
320 }
321
322 return true;
323 }
324
325
326 /* There are a large number of possible ways to implement bitmap on
327 * this hardware, most of them have some sort of drawback. Here are a
328 * few that spring to mind:
329 *
330 * Blit:
331 * - XY_MONO_SRC_BLT_CMD
332 * - use XY_SETUP_CLIP_BLT for cliprect clipping.
333 * - XY_TEXT_BLT
334 * - XY_TEXT_IMMEDIATE_BLT
335 * - blit per cliprect, subject to maximum immediate data size.
336 * - XY_COLOR_BLT
337 * - per pixel or run of pixels
338 * - XY_PIXEL_BLT
339 * - good for sparse bitmaps
340 *
341 * 3D engine:
342 * - Point per pixel
343 * - Translate bitmap to an alpha texture and render as a quad
344 * - Chop bitmap up into 32x32 squares and render w/polygon stipple.
345 */
346 void
brw_bitmap(struct gl_context * ctx,GLint x,GLint y,GLsizei width,GLsizei height,const struct gl_pixelstore_attrib * unpack,const GLubyte * pixels)347 brw_bitmap(struct gl_context * ctx,
348 GLint x, GLint y,
349 GLsizei width, GLsizei height,
350 const struct gl_pixelstore_attrib *unpack,
351 const GLubyte * pixels)
352 {
353 struct brw_context *brw = brw_context(ctx);
354
355 if (!_mesa_check_conditional_render(ctx))
356 return;
357
358 if (brw->screen->devinfo.ver < 6 &&
359 do_blit_bitmap(ctx, x, y, width, height, unpack, pixels))
360 return;
361
362 _mesa_meta_Bitmap(ctx, x, y, width, height, unpack, pixels);
363 }
364