1 /**************************************************************************
2 *
3 * Copyright 2006 VMware, Inc.
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 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.
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 */
map_pbo(struct gl_context * ctx,GLsizei width,GLsizei height,const struct gl_pixelstore_attrib * unpack,const GLubyte * bitmap)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 )
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 MAP_INTERNAL);
83 if (!buf) {
84 _mesa_error(ctx, GL_INVALID_OPERATION, "glBitmap(PBO is mapped)");
85 return NULL;
86 }
87
88 return ADD_POINTERS(buf, bitmap);
89 }
90
test_bit(const GLubyte * src,GLuint bit)91 static bool test_bit( const GLubyte *src, GLuint bit )
92 {
93 return (src[bit/8] & (1<<(bit % 8))) ? 1 : 0;
94 }
95
set_bit(GLubyte * dest,GLuint bit)96 static void set_bit( GLubyte *dest, GLuint bit )
97 {
98 dest[bit/8] |= 1 << (bit % 8);
99 }
100
101 /* Extract a rectangle's worth of data from the bitmap. Called
102 * per chunk of HW-sized bitmap.
103 */
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)104 static GLuint get_bitmap_rect(GLsizei width, GLsizei height,
105 const struct gl_pixelstore_attrib *unpack,
106 const GLubyte *bitmap,
107 GLuint x, GLuint y,
108 GLuint w, GLuint h,
109 GLubyte *dest,
110 GLuint row_align,
111 bool invert)
112 {
113 GLuint src_offset = (x + unpack->SkipPixels) & 0x7;
114 GLuint mask = unpack->LsbFirst ? 0 : 7;
115 GLuint bit = 0;
116 GLint row, col;
117 GLint first, last;
118 GLint incr;
119 GLuint count = 0;
120
121 DBG("%s %d,%d %dx%d bitmap %dx%d skip %d src_offset %d mask %d\n",
122 __func__, x,y,w,h,width,height,unpack->SkipPixels, src_offset, mask);
123
124 if (invert) {
125 first = h-1;
126 last = 0;
127 incr = -1;
128 }
129 else {
130 first = 0;
131 last = h-1;
132 incr = 1;
133 }
134
135 /* Require that dest be pre-zero'd.
136 */
137 for (row = first; row != (last+incr); row += incr) {
138 const GLubyte *rowsrc = _mesa_image_address2d(unpack, bitmap,
139 width, height,
140 GL_COLOR_INDEX, GL_BITMAP,
141 y + row, x);
142
143 for (col = 0; col < w; col++, bit++) {
144 if (test_bit(rowsrc, (col + src_offset) ^ mask)) {
145 set_bit(dest, bit ^ 7);
146 count++;
147 }
148 }
149
150 if (row_align)
151 bit = ALIGN(bit, row_align);
152 }
153
154 return count;
155 }
156
157 /**
158 * Returns the low Y value of the vertical range given, flipped according to
159 * whether the framebuffer is or not.
160 */
161 static inline int
y_flip(struct gl_framebuffer * fb,int y,int height)162 y_flip(struct gl_framebuffer *fb, int y, int height)
163 {
164 if (_mesa_is_user_fbo(fb))
165 return y;
166 else
167 return fb->Height - y - height;
168 }
169
170 /*
171 * Render a bitmap.
172 */
173 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)174 do_blit_bitmap( struct gl_context *ctx,
175 GLint dstx, GLint dsty,
176 GLsizei width, GLsizei height,
177 const struct gl_pixelstore_attrib *unpack,
178 const GLubyte *bitmap )
179 {
180 struct intel_context *intel = intel_context(ctx);
181 struct gl_framebuffer *fb = ctx->DrawBuffer;
182 struct intel_renderbuffer *irb;
183 GLfloat tmpColor[4];
184 GLubyte ubcolor[4];
185 GLuint color;
186 GLsizei bitmap_width = width;
187 GLsizei bitmap_height = height;
188 GLint px, py;
189 GLuint stipple[32];
190 GLint orig_dstx = dstx;
191 GLint orig_dsty = dsty;
192
193 /* Update draw buffer bounds */
194 _mesa_update_state(ctx);
195
196 if (ctx->Depth.Test) {
197 /* The blit path produces incorrect results when depth testing is on.
198 * It seems the blit Z coord is always 1.0 (the far plane) so fragments
199 * will likely be obscured by other, closer geometry.
200 */
201 return false;
202 }
203
204 intel_prepare_render(intel);
205
206 if (fb->_NumColorDrawBuffers != 1) {
207 perf_debug("accelerated glBitmap() only supports rendering to a "
208 "single color buffer\n");
209 return false;
210 }
211
212 irb = intel_renderbuffer(fb->_ColorDrawBuffers[0]);
213
214 if (unpack->BufferObj) {
215 bitmap = map_pbo(ctx, width, height, unpack, bitmap);
216 if (bitmap == NULL)
217 return true; /* even though this is an error, we're done */
218 }
219
220 COPY_4V(tmpColor, ctx->Current.RasterColor);
221
222 if (_mesa_need_secondary_color(ctx)) {
223 ADD_3V(tmpColor, tmpColor, ctx->Current.RasterSecondaryColor);
224 }
225
226 UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[0], tmpColor[0]);
227 UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[1], tmpColor[1]);
228 UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[2], tmpColor[2]);
229 UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[3], tmpColor[3]);
230
231 switch (irb->mt->format) {
232 case MESA_FORMAT_B8G8R8A8_UNORM:
233 case MESA_FORMAT_B8G8R8X8_UNORM:
234 color = PACK_COLOR_8888(ubcolor[3], ubcolor[0], ubcolor[1], ubcolor[2]);
235 break;
236 case MESA_FORMAT_B5G6R5_UNORM:
237 color = PACK_COLOR_565(ubcolor[0], ubcolor[1], ubcolor[2]);
238 break;
239 default:
240 perf_debug("Unsupported format %s in accelerated glBitmap()\n",
241 _mesa_get_format_name(irb->mt->format));
242 return false;
243 }
244
245 if (!intel_check_blit_fragment_ops(ctx, tmpColor[3] == 1.0F))
246 return false;
247
248 /* Clip to buffer bounds and scissor. */
249 if (!_mesa_clip_to_region(fb->_Xmin, fb->_Ymin,
250 fb->_Xmax, fb->_Ymax,
251 &dstx, &dsty, &width, &height))
252 goto out;
253
254 dsty = y_flip(fb, dsty, height);
255
256 #define DY 32
257 #define DX 32
258
259 /* Chop it all into chunks that can be digested by hardware: */
260 for (py = 0; py < height; py += DY) {
261 for (px = 0; px < width; px += DX) {
262 int h = MIN2(DY, height - py);
263 int w = MIN2(DX, width - px);
264 GLuint sz = ALIGN(ALIGN(w,8) * h, 64)/8;
265 const enum gl_logicop_mode logic_op = ctx->Color.ColorLogicOpEnabled ?
266 ctx->Color._LogicOp : COLOR_LOGICOP_COPY;
267
268 assert(sz <= sizeof(stipple));
269 memset(stipple, 0, sz);
270
271 /* May need to adjust this when padding has been introduced in
272 * sz above:
273 *
274 * Have to translate destination coordinates back into source
275 * coordinates.
276 */
277 int count = get_bitmap_rect(bitmap_width, bitmap_height, unpack,
278 bitmap,
279 -orig_dstx + (dstx + px),
280 -orig_dsty + y_flip(fb, dsty + py, h),
281 w, h,
282 (GLubyte *)stipple,
283 8,
284 _mesa_is_winsys_fbo(fb));
285 if (count == 0)
286 continue;
287
288 if (!intelEmitImmediateColorExpandBlit(intel,
289 irb->mt->cpp,
290 (GLubyte *)stipple,
291 sz,
292 color,
293 irb->mt->region->pitch,
294 irb->mt->region->bo,
295 0,
296 irb->mt->region->tiling,
297 dstx + px,
298 dsty + py,
299 w, h,
300 logic_op)) {
301 return false;
302 }
303
304 if (ctx->Query.CurrentOcclusionObject)
305 ctx->Query.CurrentOcclusionObject->Result += count;
306 }
307 }
308 out:
309
310 if (unlikely(INTEL_DEBUG & DEBUG_SYNC))
311 intel_batchbuffer_flush(intel);
312
313 if (unpack->BufferObj) {
314 /* done with PBO so unmap it now */
315 ctx->Driver.UnmapBuffer(ctx, unpack->BufferObj, MAP_INTERNAL);
316 }
317
318 intel_check_front_buffer_rendering(intel);
319
320 return true;
321 }
322
323
324 /* There are a large number of possible ways to implement bitmap on
325 * this hardware, most of them have some sort of drawback. Here are a
326 * few that spring to mind:
327 *
328 * Blit:
329 * - XY_MONO_SRC_BLT_CMD
330 * - use XY_SETUP_CLIP_BLT for cliprect clipping.
331 * - XY_TEXT_BLT
332 * - XY_TEXT_IMMEDIATE_BLT
333 * - blit per cliprect, subject to maximum immediate data size.
334 * - XY_COLOR_BLT
335 * - per pixel or run of pixels
336 * - XY_PIXEL_BLT
337 * - good for sparse bitmaps
338 *
339 * 3D engine:
340 * - Point per pixel
341 * - Translate bitmap to an alpha texture and render as a quad
342 * - Chop bitmap up into 32x32 squares and render w/polygon stipple.
343 */
344 void
intelBitmap(struct gl_context * ctx,GLint x,GLint y,GLsizei width,GLsizei height,const struct gl_pixelstore_attrib * unpack,const GLubyte * pixels)345 intelBitmap(struct gl_context * ctx,
346 GLint x, GLint y,
347 GLsizei width, GLsizei height,
348 const struct gl_pixelstore_attrib *unpack,
349 const GLubyte * pixels)
350 {
351 if (!_mesa_check_conditional_render(ctx))
352 return;
353
354 if (do_blit_bitmap(ctx, x, y, width, height,
355 unpack, pixels))
356 return;
357
358 _mesa_meta_Bitmap(ctx, x, y, width, height, unpack, pixels);
359 }
360