git.libre-soc.org Git - mesa.git/blob - src/mesa/drivers/dri/intel/intel_pixel

1 /**************************************************************************

2 *

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 **************************************************************************/

28 #include "main/glheader.h"

29 #include "main/enums.h"

30 #include "main/image.h"

31 #include "main/colormac.h"

32 #include "main/mtypes.h"

33 #include "main/macros.h"

34 #include "main/bufferobj.h"

35 #include "main/polygon.h"

36 #include "main/pixelstore.h"

37 #include "main/polygon.h"

38 #include "main/state.h"

39 #include "main/teximage.h"

40 #include "main/texenv.h"

41 #include "main/texobj.h"

42 #include "main/texstate.h"

43 #include "main/texparam.h"

44 #include "main/varray.h"

45 #include "main/attrib.h"

46 #include "main/enable.h"

47 #include "main/viewport.h"

48 #include "shader/arbprogram.h"

49 #include "glapi/dispatch.h"

50 #include "swrast/swrast.h"

52 #include "intel_screen.h"

53 #include "intel_context.h"

54 #include "intel_batchbuffer.h"

55 #include "intel_blit.h"

56 #include "intel_regions.h"

57 #include "intel_buffer_objects.h"

58 #include "intel_buffers.h"

59 #include "intel_pixel.h"

60 #include "intel_reg.h"

63 #define FILE_DEBUG_FLAG DEBUG_PIXEL

66 /* Unlike the other intel_pixel_* functions, the expectation here is

67 * that the incoming data is not in a PBO. With the XY_TEXT blit

68 * method, there's no benefit haveing it in a PBO, but we could

69 * implement a path based on XY_MONO_SRC_COPY_BLIT which might benefit

70 * PBO bitmaps. I think they are probably pretty rare though - I

71 * wonder if Xgl uses them?

72 */

 static const GLubyte *map_pbo( GLcontext *ctx,

74 GLsizei width, GLsizei height,

75 const struct gl_pixelstore_attrib *unpack,

76 const GLubyte *bitmap )

77 {

78 GLubyte *buf;

    if (!_mesa_validate_pbo_access(2, unpack, width, height, 1,

81 GL_COLOR_INDEX, GL_BITMAP,

82 (GLvoid *) bitmap)) {

       _mesa_error(ctx, GL_INVALID_OPERATION,"glBitmap(invalid PBO access)");

84 return NULL;

85 }

    buf = (GLubyte *) ctx->Driver.MapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT,

88 GL_READ_ONLY_ARB,

89 unpack->BufferObj);

90 if (!buf) {

       _mesa_error(ctx, GL_INVALID_OPERATION, "glBitmap(PBO is mapped)");

92 return NULL;

93 }

    return ADD_POINTERS(buf, bitmap);

96 }

 static GLboolean test_bit( const GLubyte *src, GLuint bit )

99 {

    return (src[bit/8] & (1<<(bit % 8))) ? 1 : 0;

101 }

102

 static void set_bit( GLubyte *dest, GLuint bit )

104 {

    dest[bit/8] |= 1 << (bit % 8);

106 }

107

108 /* Extract a rectangle's worth of data from the bitmap. Called

109 * per-cliprect.

110 */

 static GLuint get_bitmap_rect(GLsizei width, GLsizei height,

112 const struct gl_pixelstore_attrib *unpack,

113 const GLubyte *bitmap,

114 GLuint x, GLuint y,

115 GLuint w, GLuint h,

116 GLubyte *dest,

117 GLuint row_align,

118 GLboolean invert)

119 {

    GLuint src_offset = (x + unpack->SkipPixels) & 0x7;

    GLuint mask = unpack->LsbFirst ? 0 : 7;

122 GLuint bit = 0;

123 GLint row, col;

124 GLint first, last;

125 GLint incr;

126 GLuint count = 0;

127

128 if (INTEL_DEBUG & DEBUG_PIXEL)

       _mesa_printf("%s %d,%d %dx%d bitmap %dx%d skip %d src_offset %d mask %d\n",

                    __FUNCTION__, x,y,w,h,width,height,unpack->SkipPixels, src_offset, mask);

131

132 if (invert) {

133 first = h-1;

134 last = 0;

135 incr = -1;

136 }

137 else {

138 first = 0;

139 last = h-1;

140 incr = 1;

141 }

142

143 /* Require that dest be pre-zero'd.

144 */

    for (row = first; row != (last+incr); row += incr) {

       const GLubyte *rowsrc = _mesa_image_address2d(unpack, bitmap, 

147 width, height,

148 GL_COLOR_INDEX, GL_BITMAP,

149 y + row, x);

150

       for (col = 0; col < w; col++, bit++) {

          if (test_bit(rowsrc, (col + src_offset) ^ mask)) {

             set_bit(dest, bit ^ 7);

154 count++;

155 }

156 }

157

158 if (row_align)

          bit = ALIGN(bit, row_align);

160 }

161

162 return count;

163 }

164

165 /**

166 * Returns the low Y value of the vertical range given, flipped according to

167 * whether the framebuffer is or not.

168 */

169 static INLINE int

 y_flip(struct gl_framebuffer *fb, int y, int height)

171 {

    if (fb->Name != 0)

173 return y;

174 else

       return fb->Height - y - height;

176 }

177

178 /*

179 * Render a bitmap.

180 */

181 static GLboolean

182 do_blit_bitmap( GLcontext *ctx,

183 GLint dstx, GLint dsty,

184 GLsizei width, GLsizei height,

185 const struct gl_pixelstore_attrib *unpack,

186 const GLubyte *bitmap )

187 {

    struct intel_context *intel = intel_context(ctx);

    struct intel_region *dst = intel_drawbuf_region(intel);

    struct gl_framebuffer *fb = ctx->DrawBuffer;

191 GLfloat tmpColor[4];

192 GLubyte ubcolor[4];

193 GLuint color;

194 unsigned int num_cliprects;

195 drm_clip_rect_t *cliprects;

196 int x_off, y_off;

197 GLsizei bitmap_width = width;

198 GLsizei bitmap_height = height;

199

200 /* Update draw buffer bounds */

201 _mesa_update_state(ctx);

202

    if (ctx->Depth.Test) {

204 /* The blit path produces incorrect results when depth testing is on.

205 * It seems the blit Z coord is always 1.0 (the far plane) so fragments

206 * will likely be obscured by other, closer geometry.

207 */

208 return GL_FALSE;

209 }

210

211 if (!dst)

212 return GL_FALSE;

213

    if (_mesa_is_bufferobj(unpack->BufferObj)) {

       bitmap = map_pbo(ctx, width, height, unpack, bitmap);

216 if (bitmap == NULL)

217 return GL_TRUE; /* even though this is an error, we're done */

218 }

219

    COPY_4V(tmpColor, ctx->Current.RasterColor);

221

    if (NEED_SECONDARY_COLOR(ctx)) {

        ADD_3V(tmpColor, tmpColor, ctx->Current.RasterSecondaryColor);

224 }

225

    UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[0], tmpColor[0]);

    UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[1], tmpColor[1]);

    UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[2], tmpColor[2]);

    UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[3], tmpColor[3]);

230

    if (dst->cpp == 2)

       color = PACK_COLOR_565(ubcolor[0], ubcolor[1], ubcolor[2]);

233 else

       color = PACK_COLOR_8888(ubcolor[3], ubcolor[0], ubcolor[1], ubcolor[2]);

235

    if (!intel_check_blit_fragment_ops(ctx, tmpColor[3] == 1.0F))

237 return GL_FALSE;

238

    intel_get_cliprects(intel, &cliprects, &num_cliprects, &x_off, &y_off);

    if (num_cliprects != 0) {

241 GLuint i;

242 GLint orig_dstx = dstx;

243 GLint orig_dsty = dsty;

244

245 /* Clip to buffer bounds and scissor. */

       if (!_mesa_clip_to_region(fb->_Xmin, fb->_Ymin,

247 fb->_Xmax, fb->_Ymax,

                                 &dstx, &dsty, &width, &height))

249 goto out;

250

251 dstx = x_off + dstx;

       dsty = y_off + y_flip(fb, dsty, height);

253

       for (i = 0; i < num_cliprects; i++) {

          int box_x, box_y, box_w, box_h;

256 GLint px, py;

257 GLuint stipple[32];

258

259 box_x = dstx;

260 box_y = dsty;

261 box_w = width;

262 box_h = height;

263

264 /* Clip to drawable cliprect */

          if (!_mesa_clip_to_region(cliprects[i].x1,

266 cliprects[i].y1,

267 cliprects[i].x2,

268 cliprects[i].y2,

                                    &box_x, &box_y, &box_w, &box_h))

270 continue;

271

272 #define DY 32

273 #define DX 32

274

275 /* Then, finally, chop it all into chunks that can be

276 * digested by hardware:

277 */

          for (py = 0; py < box_h; py += DY) { 

             for (px = 0; px < box_w; px += DX) { 

                int h = MIN2(DY, box_h - py);

                int w = MIN2(DX, box_w - px); 

                GLuint sz = ALIGN(ALIGN(w,8) * h, 64)/8;

283 GLenum logic_op = ctx->Color.ColorLogicOpEnabled ?

284 ctx->Color.LogicOp : GL_COPY;

285

                assert(sz <= sizeof(stipple));

                memset(stipple, 0, sz);

288

289 /* May need to adjust this when padding has been introduced in

290 * sz above:

291 *

292 * Have to translate destination coordinates back into source

293 * coordinates.

294 */

                if (get_bitmap_rect(bitmap_width, bitmap_height, unpack,

296 bitmap,

                                    -orig_dstx + (box_x + px - x_off),

                                    -orig_dsty + y_flip(fb,

299 box_y + py - y_off, h),

300 w, h,

301 (GLubyte *)stipple,

302 8,

                                    fb->Name == 0 ? GL_TRUE : GL_FALSE) == 0)

304 continue;

305

                if (!intelEmitImmediateColorExpandBlit(intel,

307 dst->cpp,

308 (GLubyte *)stipple,

309 sz,

310 color,

311 dst->pitch,

312 dst->buffer,

313 0,

314 dst->tiling,

315 box_x + px,

316 box_y + py,

317 w, h,

318 logic_op)) {

319 return GL_FALSE;

320 }

321 }

322 }

323 }

324 }

325 out:

326

327 if (INTEL_DEBUG & DEBUG_SYNC)

328 intel_batchbuffer_flush(intel->batch);

329

    if (_mesa_is_bufferobj(unpack->BufferObj)) {

331 /* done with PBO so unmap it now */

       ctx->Driver.UnmapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT,

333 unpack->BufferObj);

334 }

335

336 intel_check_front_buffer_rendering(intel);

337

338 return GL_TRUE;

339 }

340

341 static GLboolean

342 intel_texture_bitmap(GLcontext * ctx,

343 GLint dst_x, GLint dst_y,

344 GLsizei width, GLsizei height,

345 const struct gl_pixelstore_attrib *unpack,

346 const GLubyte *bitmap)

347 {

    struct intel_context *intel = intel_context(ctx);

349 static const char *fp =

350 "!!ARBfp1.0\n"

351 "TEMP val;\n"

352 "PARAM color=program.local[0];\n"

353 "TEX val, fragment.texcoord[0], texture[0], 2D;\n"

354 "ADD val, val.wwww, {-.5, -.5, -.5, -.5};\n"

355 "KIL val;\n"

356 "MOV result.color, color;\n"

357 "END\n";

358 GLuint texname;

    GLfloat vertices[4][4];

360 GLint old_active_texture;

361 GLubyte *a8_bitmap;

362 GLfloat dst_z;

363

364 /* We need a fragment program for the KIL effect */

    if (!ctx->Extensions.ARB_fragment_program ||

366 !ctx->Extensions.ARB_vertex_program) {

367 if (INTEL_DEBUG & DEBUG_FALLBACKS)

368 fprintf(stderr,

369 "glBitmap fallback: No fragment/vertex program support\n");

370 return GL_FALSE;

371 }

372

373 /* We're going to mess with texturing with no regard to existing texture

374 * state, so if there is some set up we have to bail.

375 */

    if (ctx->Texture._EnabledUnits != 0) {

377 if (INTEL_DEBUG & DEBUG_FALLBACKS)

          fprintf(stderr, "glBitmap fallback: texturing enabled\n");

379 return GL_FALSE;

380 }

381

382 /* Can't do textured DrawPixels with a fragment program, unless we were

383 * to generate a new program that sampled our texture and put the results

384 * in the fragment color before the user's program started.

385 */

    if (ctx->FragmentProgram.Enabled) {

387 if (INTEL_DEBUG & DEBUG_FALLBACKS)

          fprintf(stderr, "glBitmap fallback: fragment program enabled\n");

389 return GL_FALSE;

390 }

391

    if (ctx->VertexProgram.Enabled) {

393 if (INTEL_DEBUG & DEBUG_FALLBACKS)

          fprintf(stderr, "glBitmap fallback: vertex program enabled\n");

395 return GL_FALSE;

396 }

397

    if (!ctx->Extensions.ARB_texture_non_power_of_two &&

        (!is_power_of_two(width) || !is_power_of_two(height))) {

400 if (INTEL_DEBUG & DEBUG_FALLBACKS)

401 fprintf(stderr,

402 "glBitmap() fallback: NPOT texture\n");

403 return GL_FALSE;

404 }

405

    if (ctx->Fog.Enabled) {

407 if (INTEL_DEBUG & DEBUG_FALLBACKS)

          fprintf(stderr, "glBitmap() fallback: fog\n");

409 return GL_FALSE;

410 }

411

412 /* Check that we can load in a texture this big. */

    if (width > (1 << (ctx->Const.MaxTextureLevels - 1)) ||

        height > (1 << (ctx->Const.MaxTextureLevels - 1))) {

415 if (INTEL_DEBUG & DEBUG_FALLBACKS)

          fprintf(stderr, "glBitmap fallback: bitmap too large (%dx%d)\n",

417 width, height);

418 return GL_FALSE;

419 }

420

    if (_mesa_is_bufferobj(unpack->BufferObj)) {

       bitmap = map_pbo(ctx, width, height, unpack, bitmap);

423 if (bitmap == NULL)

424 return GL_TRUE; /* even though this is an error, we're done */

425 }

426

427 /* Convert the A1 bitmap to an A8 format suitable for glTexImage */

    a8_bitmap = _mesa_calloc(width * height);

    _mesa_expand_bitmap(width, height, unpack, bitmap, a8_bitmap, width, 0xff);

430

    if (_mesa_is_bufferobj(unpack->BufferObj)) {

432 /* done with PBO so unmap it now */

       ctx->Driver.UnmapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT,

434 unpack->BufferObj);

435 }

436

437 /* Save GL state before we start setting up our drawing */

    _mesa_PushAttrib(GL_ENABLE_BIT | GL_CURRENT_BIT | GL_POLYGON_BIT |

439 GL_TEXTURE_BIT | GL_VIEWPORT_BIT);

440 _mesa_PushClientAttrib(GL_CLIENT_VERTEX_ARRAY_BIT |

441 GL_CLIENT_PIXEL_STORE_BIT);

442 old_active_texture = ctx->Texture.CurrentUnit;

443

444 _mesa_Disable(GL_POLYGON_STIPPLE);

445 _mesa_PolygonMode(GL_FRONT_AND_BACK, GL_FILL);

446

447 /* Upload our bitmap data to an alpha texture */

448 _mesa_ActiveTextureARB(GL_TEXTURE0_ARB);

449 _mesa_Enable(GL_TEXTURE_2D);

    _mesa_GenTextures(1, &texname);

451 _mesa_BindTexture(GL_TEXTURE_2D, texname);

    _mesa_TexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);

    _mesa_TexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);

454

455 _mesa_PixelStorei(GL_UNPACK_SWAP_BYTES, GL_FALSE);

456 _mesa_PixelStorei(GL_UNPACK_LSB_FIRST, GL_FALSE);

    _mesa_PixelStorei(GL_UNPACK_ROW_LENGTH, 0);

    _mesa_PixelStorei(GL_UNPACK_SKIP_PIXELS, 0);

    _mesa_PixelStorei(GL_UNPACK_SKIP_ROWS, 0);

    _mesa_PixelStorei(GL_UNPACK_ALIGNMENT, 1);

    _mesa_TexImage2D(GL_TEXTURE_2D, 0, GL_ALPHA, width, height, 0,

462 GL_ALPHA, GL_UNSIGNED_BYTE, a8_bitmap);

463 _mesa_free(a8_bitmap);

464

    meta_set_fragment_program(&intel->meta, &intel->meta.bitmap_fp, fp);

    _mesa_ProgramLocalParameter4fvARB(GL_FRAGMENT_PROGRAM_ARB, 0,

467 ctx->Current.RasterColor);

468 meta_set_passthrough_vertex_program(&intel->meta);

469 meta_set_passthrough_transform(&intel->meta);

470

471 /* convert rasterpos Z from [0,1] to NDC coord in [-1,1] */

    dst_z = -1.0 + 2.0 * ctx->Current.RasterPos[2];

473

474 /* RasterPos[2] already takes into account the DepthRange mapping. */

    _mesa_DepthRange(0.0, 1.0);

476

    vertices[0][0] = dst_x;

    vertices[0][1] = dst_y;

    vertices[0][2] = dst_z;

    vertices[0][3] = 1.0;

    vertices[1][0] = dst_x + width;

    vertices[1][1] = dst_y;

    vertices[1][2] = dst_z;

    vertices[1][3] = 1.0;

    vertices[2][0] = dst_x + width;

    vertices[2][1] = dst_y + height;

    vertices[2][2] = dst_z;

    vertices[2][3] = 1.0;

    vertices[3][0] = dst_x;

    vertices[3][1] = dst_y + height;

    vertices[3][2] = dst_z;

    vertices[3][3] = 1.0;

493

    _mesa_VertexPointer(4, GL_FLOAT, 4 * sizeof(GLfloat), &vertices);

495 _mesa_Enable(GL_VERTEX_ARRAY);

496 meta_set_default_texrect(&intel->meta);

    _mesa_DrawArrays(GL_TRIANGLE_FAN, 0, 4);

498

499 meta_restore_texcoords(&intel->meta);

500 meta_restore_transform(&intel->meta);

501 meta_restore_fragment_program(&intel->meta);

502 meta_restore_vertex_program(&intel->meta);

503

504 _mesa_ActiveTextureARB(GL_TEXTURE0_ARB + old_active_texture);

505 _mesa_PopClientAttrib();

506 _mesa_PopAttrib();

507

    _mesa_DeleteTextures(1, &texname);

509

510 return GL_TRUE;

511 }

512

513 /* There are a large number of possible ways to implement bitmap on

514 * this hardware, most of them have some sort of drawback. Here are a

515 * few that spring to mind:

516 *

517 * Blit:

518 * - XY_MONO_SRC_BLT_CMD

519 * - use XY_SETUP_CLIP_BLT for cliprect clipping.

520 * - XY_TEXT_BLT

521 * - XY_TEXT_IMMEDIATE_BLT

522 * - blit per cliprect, subject to maximum immediate data size.

523 * - XY_COLOR_BLT

524 * - per pixel or run of pixels

525 * - XY_PIXEL_BLT

526 * - good for sparse bitmaps

527 *

528 * 3D engine:

529 * - Point per pixel

530 * - Translate bitmap to an alpha texture and render as a quad

531 * - Chop bitmap up into 32x32 squares and render w/polygon stipple.

532 */

533 void

534 intelBitmap(GLcontext * ctx,

535 GLint x, GLint y,

536 GLsizei width, GLsizei height,

537 const struct gl_pixelstore_attrib *unpack,

538 const GLubyte * pixels)

539 {

    if (do_blit_bitmap(ctx, x, y, width, height,

541 unpack, pixels))

542 return;

543

    if (intel_texture_bitmap(ctx, x, y, width, height,

545 unpack, pixels))

546 return;

547

548 if (INTEL_DEBUG & DEBUG_PIXEL)

       _mesa_printf("%s: fallback to swrast\n", __FUNCTION__);

550

    _swrast_Bitmap(ctx, x, y, width, height, unpack, pixels);

552 }