gl/mesa/src/mesa/drivers/dri/r200/r200_blit.c

   1 /*
   2  * Copyright (C) 2009 Maciej Cencora <m.cencora@gmail.com>
   3  *
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining
   7  * a 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, sublicense, 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
  16  * portions of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  19  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  21  * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
  22  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  23  * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  24  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  */
  27
  28 #include "radeon_common.h"
  29 #include "r200_context.h"
  30 #include "r200_blit.h"
  31
  32 static inline uint32_t cmdpacket0(struct radeon_screen *rscrn,
  33                                   int reg, int count)
  34 {
  35     if (count)
  36             return CP_PACKET0(reg, count - 1);
  37     return CP_PACKET2;
  38 }
  39
  40 /* common formats supported as both textures and render targets */
  41 unsigned r200_check_blit(gl_format mesa_format, uint32_t dst_pitch)
  42 {
  43     /* XXX others?  BE/LE? */
  44     switch (mesa_format) {
  45     case MESA_FORMAT_ARGB8888:
  46     case MESA_FORMAT_XRGB8888:
  47     case MESA_FORMAT_RGB565:
  48     case MESA_FORMAT_ARGB4444:
  49     case MESA_FORMAT_ARGB1555:
  50     case MESA_FORMAT_A8:
  51     case MESA_FORMAT_L8:
  52     case MESA_FORMAT_I8:
  53     /* swizzled */
  54     case MESA_FORMAT_RGBA8888:
  55     case MESA_FORMAT_RGBA8888_REV:
  56             break;
  57     default:
  58             return 0;
  59     }
  60
  61     /* Rendering to small buffer doesn't work.
  62      * Looks like a hw limitation.
  63      */
  64     if (dst_pitch < 32)
  65             return 0;
  66
  67     /* ??? */
  68     if (_mesa_get_format_bits(mesa_format, GL_DEPTH_BITS) > 0)
  69             return 0;
  70
  71     return 1;
  72 }
  73
  74 static inline void emit_vtx_state(struct r200_context *r200)
  75 {
  76     BATCH_LOCALS(&r200->radeon);
  77
  78     BEGIN_BATCH(14);
  79     if (r200->radeon.radeonScreen->chip_flags & RADEON_CHIPSET_TCL) {
  80             OUT_BATCH_REGVAL(R200_SE_VAP_CNTL_STATUS, 0);
  81     } else {
  82             OUT_BATCH_REGVAL(R200_SE_VAP_CNTL_STATUS, RADEON_TCL_BYPASS);
  83     }
  84     OUT_BATCH_REGVAL(R200_SE_VAP_CNTL, (R200_VAP_FORCE_W_TO_ONE |
  85                                         (9 << R200_VAP_VF_MAX_VTX_NUM__SHIFT)));
  86     OUT_BATCH_REGVAL(R200_SE_VTX_STATE_CNTL, 0);
  87     OUT_BATCH_REGVAL(R200_SE_VTE_CNTL, 0);
  88     OUT_BATCH_REGVAL(R200_SE_VTX_FMT_0, R200_VTX_XY);
  89     OUT_BATCH_REGVAL(R200_SE_VTX_FMT_1, (2 << R200_VTX_TEX0_COMP_CNT_SHIFT));
  90     OUT_BATCH_REGVAL(RADEON_SE_CNTL, (RADEON_DIFFUSE_SHADE_GOURAUD |
  91                                       RADEON_BFACE_SOLID |
  92                                       RADEON_FFACE_SOLID |
  93                                       RADEON_VTX_PIX_CENTER_OGL |
  94                                       RADEON_ROUND_MODE_ROUND |
  95                                       RADEON_ROUND_PREC_4TH_PIX));
  96     END_BATCH();
  97 }
  98
  99 static void inline emit_tx_setup(struct r200_context *r200,
 100                                  gl_format src_mesa_format,
 101                                  gl_format dst_mesa_format,
 102                                  struct radeon_bo *bo,
 103                                  intptr_t offset,
 104                                  unsigned width,
 105                                  unsigned height,
 106                                  unsigned pitch)
 107 {
 108     uint32_t txformat = R200_TXFORMAT_NON_POWER2;
 109     BATCH_LOCALS(&r200->radeon);
 110
 111     assert(width <= 2047);
 112     assert(height <= 2047);
 113     assert(offset % 32 == 0);
 114
 115     /* XXX others?  BE/LE? */
 116     switch (src_mesa_format) {
 117     case MESA_FORMAT_ARGB8888:
 118             txformat |= R200_TXFORMAT_ARGB8888 | R200_TXFORMAT_ALPHA_IN_MAP;
 119             break;
 120     case MESA_FORMAT_RGBA8888:
 121             txformat |= R200_TXFORMAT_RGBA8888 | R200_TXFORMAT_ALPHA_IN_MAP;
 122             break;
 123     case MESA_FORMAT_RGBA8888_REV:
 124             txformat |= R200_TXFORMAT_ABGR8888 | R200_TXFORMAT_ALPHA_IN_MAP;
 125             break;
 126     case MESA_FORMAT_XRGB8888:
 127             txformat |= R200_TXFORMAT_ARGB8888;
 128             break;
 129     case MESA_FORMAT_RGB565:
 130             txformat |= R200_TXFORMAT_RGB565;
 131             break;
 132     case MESA_FORMAT_ARGB4444:
 133             txformat |= R200_TXFORMAT_ARGB4444 | R200_TXFORMAT_ALPHA_IN_MAP;
 134             break;
 135     case MESA_FORMAT_ARGB1555:
 136             txformat |= R200_TXFORMAT_ARGB1555 | R200_TXFORMAT_ALPHA_IN_MAP;
 137             break;
 138     case MESA_FORMAT_A8:
 139     case MESA_FORMAT_I8:
 140             txformat |= R200_TXFORMAT_I8 | R200_TXFORMAT_ALPHA_IN_MAP;
 141             break;
 142     case MESA_FORMAT_L8:
 143             txformat |= R200_TXFORMAT_I8;
 144             break;
 145     case MESA_FORMAT_AL88:
 146             txformat |= R200_TXFORMAT_AI88 | R200_TXFORMAT_ALPHA_IN_MAP;
 147             break;
 148     default:
 149             break;
 150     }
 151
 152     if (bo->flags & RADEON_BO_FLAGS_MACRO_TILE)
 153         offset |= R200_TXO_MACRO_TILE;
 154     if (bo->flags & RADEON_BO_FLAGS_MICRO_TILE)
 155         offset |= R200_TXO_MICRO_TILE;
 156
 157     switch (dst_mesa_format) {
 158     case MESA_FORMAT_ARGB8888:
 159     case MESA_FORMAT_XRGB8888:
 160     case MESA_FORMAT_RGB565:
 161     case MESA_FORMAT_ARGB4444:
 162     case MESA_FORMAT_ARGB1555:
 163     case MESA_FORMAT_A8:
 164     case MESA_FORMAT_L8:
 165     case MESA_FORMAT_I8:
 166     default:
 167             /* no swizzle required */
 168             BEGIN_BATCH(10);
 169             OUT_BATCH_REGVAL(RADEON_PP_CNTL, (RADEON_TEX_0_ENABLE |
 170                                               RADEON_TEX_BLEND_0_ENABLE));
 171             OUT_BATCH_REGVAL(R200_PP_TXCBLEND_0, (R200_TXC_ARG_A_ZERO |
 172                                                   R200_TXC_ARG_B_ZERO |
 173                                                   R200_TXC_ARG_C_R0_COLOR |
 174                                                   R200_TXC_OP_MADD));
 175             OUT_BATCH_REGVAL(R200_PP_TXCBLEND2_0, (R200_TXC_CLAMP_0_1 |
 176                                                    R200_TXC_OUTPUT_REG_R0));
 177             OUT_BATCH_REGVAL(R200_PP_TXABLEND_0, (R200_TXA_ARG_A_ZERO |
 178                                                   R200_TXA_ARG_B_ZERO |
 179                                                   R200_TXA_ARG_C_R0_ALPHA |
 180                                                   R200_TXA_OP_MADD));
 181             OUT_BATCH_REGVAL(R200_PP_TXABLEND2_0, (R200_TXA_CLAMP_0_1 |
 182                                                    R200_TXA_OUTPUT_REG_R0));
 183             END_BATCH();
 184             break;
 185     case MESA_FORMAT_RGBA8888:
 186             BEGIN_BATCH(10);
 187             OUT_BATCH_REGVAL(RADEON_PP_CNTL, (RADEON_TEX_0_ENABLE |
 188                                               RADEON_TEX_BLEND_0_ENABLE));
 189             OUT_BATCH_REGVAL(R200_PP_TXCBLEND_0, (R200_TXC_ARG_A_ZERO |
 190                                                   R200_TXC_ARG_B_ZERO |
 191                                                   R200_TXC_ARG_C_R0_COLOR |
 192                                                   R200_TXC_OP_MADD));
 193             OUT_BATCH_REGVAL(R200_PP_TXCBLEND2_0, (R200_TXC_CLAMP_0_1 |
 194                                                    R200_TXC_OUTPUT_ROTATE_GBA |
 195                                                    R200_TXC_OUTPUT_REG_R0));
 196             OUT_BATCH_REGVAL(R200_PP_TXABLEND_0, (R200_TXA_ARG_A_ZERO |
 197                                                   R200_TXA_ARG_B_ZERO |
 198                                                   R200_TXA_ARG_C_R0_ALPHA |
 199                                                   R200_TXA_OP_MADD));
 200             OUT_BATCH_REGVAL(R200_PP_TXABLEND2_0, (R200_TXA_CLAMP_0_1 |
 201                                                    (R200_TXA_REPL_RED << R200_TXA_REPL_ARG_C_SHIFT) |
 202                                                    R200_TXA_OUTPUT_REG_R0));
 203             END_BATCH();
 204             break;
 205     case MESA_FORMAT_RGBA8888_REV:
 206             BEGIN_BATCH(34);
 207             OUT_BATCH_REGVAL(RADEON_PP_CNTL, (RADEON_TEX_0_ENABLE |
 208                                               RADEON_TEX_BLEND_0_ENABLE |
 209                                               RADEON_TEX_BLEND_1_ENABLE |
 210                                               RADEON_TEX_BLEND_2_ENABLE |
 211                                               RADEON_TEX_BLEND_3_ENABLE));
 212             /* r1.r = r0.b */
 213             OUT_BATCH_REGVAL(R200_PP_TXCBLEND_0, (R200_TXC_ARG_A_ZERO |
 214                                                   R200_TXC_ARG_B_ZERO |
 215                                                   R200_TXC_ARG_C_R0_COLOR |
 216                                                   R200_TXC_OP_MADD));
 217             OUT_BATCH_REGVAL(R200_PP_TXCBLEND2_0, (R200_TXC_CLAMP_0_1 |
 218                                                    R200_TXC_OUTPUT_MASK_R |
 219                                                    (R200_TXC_REPL_BLUE << R200_TXC_REPL_ARG_C_SHIFT) |
 220                                                    R200_TXC_OUTPUT_REG_R1));
 221             /* r1.a = r0.a */
 222             OUT_BATCH_REGVAL(R200_PP_TXABLEND_0, (R200_TXA_ARG_A_ZERO |
 223                                                   R200_TXA_ARG_B_ZERO |
 224                                                   R200_TXA_ARG_C_R0_ALPHA |
 225                                                   R200_TXA_OP_MADD));
 226             OUT_BATCH_REGVAL(R200_PP_TXABLEND2_0, (R200_TXA_CLAMP_0_1 |
 227                                                    R200_TXA_OUTPUT_REG_R1));
 228             /* r1.g = r0.g */
 229             OUT_BATCH_REGVAL(R200_PP_TXCBLEND_1, (R200_TXC_ARG_A_ZERO |
 230                                                   R200_TXC_ARG_B_ZERO |
 231                                                   R200_TXC_ARG_C_R0_COLOR |
 232                                                   R200_TXC_OP_MADD));
 233             OUT_BATCH_REGVAL(R200_PP_TXCBLEND2_1, (R200_TXC_CLAMP_0_1 |
 234                                                    R200_TXC_OUTPUT_MASK_G |
 235                                                    (R200_TXC_REPL_GREEN << R200_TXC_REPL_ARG_C_SHIFT) |
 236                                                    R200_TXC_OUTPUT_REG_R1));
 237             /* r1.a = r0.a */
 238             OUT_BATCH_REGVAL(R200_PP_TXABLEND_1, (R200_TXA_ARG_A_ZERO |
 239                                                   R200_TXA_ARG_B_ZERO |
 240                                                   R200_TXA_ARG_C_R0_ALPHA |
 241                                                   R200_TXA_OP_MADD));
 242             OUT_BATCH_REGVAL(R200_PP_TXABLEND2_1, (R200_TXA_CLAMP_0_1 |
 243                                                    R200_TXA_OUTPUT_REG_R1));
 244             /* r1.b = r0.r */
 245             OUT_BATCH_REGVAL(R200_PP_TXCBLEND_2, (R200_TXC_ARG_A_ZERO |
 246                                                   R200_TXC_ARG_B_ZERO |
 247                                                   R200_TXC_ARG_C_R0_COLOR |
 248                                                   R200_TXC_OP_MADD));
 249             OUT_BATCH_REGVAL(R200_PP_TXCBLEND2_2, (R200_TXC_CLAMP_0_1 |
 250                                                    R200_TXC_OUTPUT_MASK_B |
 251                                                    (R200_TXC_REPL_RED << R200_TXC_REPL_ARG_C_SHIFT) |
 252                                                    R200_TXC_OUTPUT_REG_R1));
 253             /* r1.a = r0.a */
 254             OUT_BATCH_REGVAL(R200_PP_TXABLEND_2, (R200_TXA_ARG_A_ZERO |
 255                                                   R200_TXA_ARG_B_ZERO |
 256                                                   R200_TXA_ARG_C_R0_ALPHA |
 257                                                   R200_TXA_OP_MADD));
 258             OUT_BATCH_REGVAL(R200_PP_TXABLEND2_2, (R200_TXA_CLAMP_0_1 |
 259                                                    R200_TXA_OUTPUT_REG_R1));
 260             /* r0.rgb = r1.rgb */
 261             OUT_BATCH_REGVAL(R200_PP_TXCBLEND_3, (R200_TXC_ARG_A_ZERO |
 262                                                   R200_TXC_ARG_B_ZERO |
 263                                                   R200_TXC_ARG_C_R1_COLOR |
 264                                                   R200_TXC_OP_MADD));
 265             OUT_BATCH_REGVAL(R200_PP_TXCBLEND2_3, (R200_TXC_CLAMP_0_1 |
 266                                                    R200_TXC_OUTPUT_REG_R0));
 267             /* r0.a = r1.a */
 268             OUT_BATCH_REGVAL(R200_PP_TXABLEND_3, (R200_TXA_ARG_A_ZERO |
 269                                                   R200_TXA_ARG_B_ZERO |
 270                                                   R200_TXA_ARG_C_R1_ALPHA |
 271                                                   R200_TXA_OP_MADD));
 272             OUT_BATCH_REGVAL(R200_PP_TXABLEND2_3, (R200_TXA_CLAMP_0_1 |
 273                                                    R200_TXA_OUTPUT_REG_R0));
 274             END_BATCH();
 275             break;
 276     }
 277
 278     BEGIN_BATCH(18);
 279     OUT_BATCH_REGVAL(R200_PP_CNTL_X, 0);
 280     OUT_BATCH_REGVAL(R200_PP_TXMULTI_CTL_0, 0);
 281     OUT_BATCH_REGVAL(R200_PP_TXFILTER_0, (R200_CLAMP_S_CLAMP_LAST |
 282                                           R200_CLAMP_T_CLAMP_LAST |
 283                                           R200_MAG_FILTER_NEAREST |
 284                                           R200_MIN_FILTER_NEAREST));
 285     OUT_BATCH_REGVAL(R200_PP_TXFORMAT_0, txformat);
 286     OUT_BATCH_REGVAL(R200_PP_TXFORMAT_X_0, 0);
 287     OUT_BATCH_REGVAL(R200_PP_TXSIZE_0, ((width - 1) |
 288                                         ((height - 1) << RADEON_TEX_VSIZE_SHIFT)));
 289     OUT_BATCH_REGVAL(R200_PP_TXPITCH_0, pitch * _mesa_get_format_bytes(src_mesa_format) - 32);
 290
 291     OUT_BATCH_REGSEQ(R200_PP_TXOFFSET_0, 1);
 292     OUT_BATCH_RELOC(offset, bo, offset, RADEON_GEM_DOMAIN_GTT|RADEON_GEM_DOMAIN_VRAM, 0, 0);
 293
 294     END_BATCH();
 295 }
 296
 297 static inline void emit_cb_setup(struct r200_context *r200,
 298                                  struct radeon_bo *bo,
 299                                  intptr_t offset,
 300                                  gl_format mesa_format,
 301                                  unsigned pitch,
 302                                  unsigned width,
 303                                  unsigned height)
 304 {
 305     uint32_t dst_pitch = pitch;
 306     uint32_t dst_format = 0;
 307     BATCH_LOCALS(&r200->radeon);
 308
 309     /* XXX others?  BE/LE? */
 310     switch (mesa_format) {
 311     case MESA_FORMAT_ARGB8888:
 312     case MESA_FORMAT_XRGB8888:
 313     case MESA_FORMAT_RGBA8888:
 314     case MESA_FORMAT_RGBA8888_REV:
 315             dst_format = RADEON_COLOR_FORMAT_ARGB8888;
 316             break;
 317     case MESA_FORMAT_RGB565:
 318             dst_format = RADEON_COLOR_FORMAT_RGB565;
 319             break;
 320     case MESA_FORMAT_ARGB4444:
 321             dst_format = RADEON_COLOR_FORMAT_ARGB4444;
 322             break;
 323     case MESA_FORMAT_ARGB1555:
 324             dst_format = RADEON_COLOR_FORMAT_ARGB1555;
 325             break;
 326     case MESA_FORMAT_A8:
 327     case MESA_FORMAT_L8:
 328     case MESA_FORMAT_I8:
 329             dst_format = RADEON_COLOR_FORMAT_RGB8;
 330             break;
 331     default:
 332             break;
 333     }
 334
 335     if (bo->flags & RADEON_BO_FLAGS_MACRO_TILE)
 336         dst_pitch |= R200_COLOR_TILE_ENABLE;
 337     if (bo->flags & RADEON_BO_FLAGS_MICRO_TILE)
 338         dst_pitch |= R200_COLOR_MICROTILE_ENABLE;
 339
 340     BEGIN_BATCH_NO_AUTOSTATE(22);
 341     OUT_BATCH_REGVAL(R200_RE_AUX_SCISSOR_CNTL, 0);
 342     OUT_BATCH_REGVAL(R200_RE_CNTL, 0);
 343     OUT_BATCH_REGVAL(RADEON_RE_TOP_LEFT, 0);
 344     OUT_BATCH_REGVAL(RADEON_RE_WIDTH_HEIGHT, ((width << RADEON_RE_WIDTH_SHIFT) |
 345                                               (height << RADEON_RE_HEIGHT_SHIFT)));
 346     OUT_BATCH_REGVAL(RADEON_RB3D_PLANEMASK, 0xffffffff);
 347     OUT_BATCH_REGVAL(RADEON_RB3D_BLENDCNTL, RADEON_SRC_BLEND_GL_ONE | RADEON_DST_BLEND_GL_ZERO);
 348     OUT_BATCH_REGVAL(RADEON_RB3D_CNTL, dst_format);
 349
 350     OUT_BATCH_REGSEQ(RADEON_RB3D_COLOROFFSET, 1);
 351     OUT_BATCH_RELOC(offset, bo, offset, 0, RADEON_GEM_DOMAIN_GTT|RADEON_GEM_DOMAIN_VRAM, 0);
 352     OUT_BATCH_REGSEQ(RADEON_RB3D_COLORPITCH, 1);
 353     OUT_BATCH_RELOC(dst_pitch, bo, dst_pitch, 0, RADEON_GEM_DOMAIN_GTT|RADEON_GEM_DOMAIN_VRAM, 0);
 354
 355     END_BATCH();
 356 }
 357
 358 static GLboolean validate_buffers(struct r200_context *r200,
 359                                   struct radeon_bo *src_bo,
 360                                   struct radeon_bo *dst_bo)
 361 {
 362     int ret;
 363
 364     radeon_cs_space_reset_bos(r200->radeon.cmdbuf.cs);
 365
 366     ret = radeon_cs_space_check_with_bo(r200->radeon.cmdbuf.cs,
 367                                         src_bo, RADEON_GEM_DOMAIN_VRAM | RADEON_GEM_DOMAIN_GTT, 0);
 368     if (ret)
 369         return GL_FALSE;
 370
 371     ret = radeon_cs_space_check_with_bo(r200->radeon.cmdbuf.cs,
 372                                         dst_bo, 0, RADEON_GEM_DOMAIN_VRAM | RADEON_GEM_DOMAIN_GTT);
 373     if (ret)
 374         return GL_FALSE;
 375
 376     return GL_TRUE;
 377 }
 378
 379 /**
 380  * Calculate texcoords for given image region.
 381  * Output values are [minx, maxx, miny, maxy]
 382  */
 383 static inline void calc_tex_coords(float img_width, float img_height,
 384                                    float x, float y,
 385                                    float reg_width, float reg_height,
 386                                    unsigned flip_y, float *buf)
 387 {
 388     buf[0] = x / img_width;
 389     buf[1] = buf[0] + reg_width / img_width;
 390     buf[2] = y / img_height;
 391     buf[3] = buf[2] + reg_height / img_height;
 392     if (flip_y)
 393     {
 394         buf[2] = 1.0 - buf[2];
 395         buf[3] = 1.0 - buf[3];
 396     }
 397 }
 398
 399 static inline void emit_draw_packet(struct r200_context *r200,
 400                                     unsigned src_width, unsigned src_height,
 401                                     unsigned src_x_offset, unsigned src_y_offset,
 402                                     unsigned dst_x_offset, unsigned dst_y_offset,
 403                                     unsigned reg_width, unsigned reg_height,
 404                                     unsigned flip_y)
 405 {
 406     float texcoords[4];
 407     float verts[12];
 408     BATCH_LOCALS(&r200->radeon);
 409
 410     calc_tex_coords(src_width, src_height,
 411                     src_x_offset, src_y_offset,
 412                     reg_width, reg_height,
 413                     flip_y, texcoords);
 414
 415     verts[0] = dst_x_offset;
 416     verts[1] = dst_y_offset + reg_height;
 417     verts[2] = texcoords[0];
 418     verts[3] = texcoords[3];
 419
 420     verts[4] = dst_x_offset + reg_width;
 421     verts[5] = dst_y_offset + reg_height;
 422     verts[6] = texcoords[1];
 423     verts[7] = texcoords[3];
 424
 425     verts[8] = dst_x_offset + reg_width;
 426     verts[9] = dst_y_offset;
 427     verts[10] = texcoords[1];
 428     verts[11] = texcoords[2];
 429
 430     BEGIN_BATCH(14);
 431     OUT_BATCH(R200_CP_CMD_3D_DRAW_IMMD_2 | (12 << 16));
 432     OUT_BATCH(RADEON_CP_VC_CNTL_PRIM_WALK_RING |
 433               RADEON_CP_VC_CNTL_PRIM_TYPE_RECT_LIST |
 434               (3 << 16));
 435     OUT_BATCH_TABLE(verts, 12);
 436     END_BATCH();
 437 }
 438
 439 /**
 440  * Copy a region of [@a width x @a height] pixels from source buffer
 441  * to destination buffer.
 442  * @param[in] r200 r200 context
 443  * @param[in] src_bo source radeon buffer object
 444  * @param[in] src_offset offset of the source image in the @a src_bo
 445  * @param[in] src_mesaformat source image format
 446  * @param[in] src_pitch aligned source image width
 447  * @param[in] src_width source image width
 448  * @param[in] src_height source image height
 449  * @param[in] src_x_offset x offset in the source image
 450  * @param[in] src_y_offset y offset in the source image
 451  * @param[in] dst_bo destination radeon buffer object
 452  * @param[in] dst_offset offset of the destination image in the @a dst_bo
 453  * @param[in] dst_mesaformat destination image format
 454  * @param[in] dst_pitch aligned destination image width
 455  * @param[in] dst_width destination image width
 456  * @param[in] dst_height destination image height
 457  * @param[in] dst_x_offset x offset in the destination image
 458  * @param[in] dst_y_offset y offset in the destination image
 459  * @param[in] width region width
 460  * @param[in] height region height
 461  * @param[in] flip_y set if y coords of the source image need to be flipped
 462  */
 463 unsigned r200_blit(struct gl_context *ctx,
 464                    struct radeon_bo *src_bo,
 465                    intptr_t src_offset,
 466                    gl_format src_mesaformat,
 467                    unsigned src_pitch,
 468                    unsigned src_width,
 469                    unsigned src_height,
 470                    unsigned src_x_offset,
 471                    unsigned src_y_offset,
 472                    struct radeon_bo *dst_bo,
 473                    intptr_t dst_offset,
 474                    gl_format dst_mesaformat,
 475                    unsigned dst_pitch,
 476                    unsigned dst_width,
 477                    unsigned dst_height,
 478                    unsigned dst_x_offset,
 479                    unsigned dst_y_offset,
 480                    unsigned reg_width,
 481                    unsigned reg_height,
 482                    unsigned flip_y)
 483 {
 484     struct r200_context *r200 = R200_CONTEXT(ctx);
 485
 486     if (!r200_check_blit(dst_mesaformat, dst_pitch))
 487         return GL_FALSE;
 488
 489     /* Make sure that colorbuffer has even width - hw limitation */
 490     if (dst_pitch % 2 > 0)
 491         ++dst_pitch;
 492
 493     /* Need to clamp the region size to make sure
 494      * we don't read outside of the source buffer
 495      * or write outside of the destination buffer.
 496      */
 497     if (reg_width + src_x_offset > src_width)
 498         reg_width = src_width - src_x_offset;
 499     if (reg_height + src_y_offset > src_height)
 500         reg_height = src_height - src_y_offset;
 501     if (reg_width + dst_x_offset > dst_width)
 502         reg_width = dst_width - dst_x_offset;
 503     if (reg_height + dst_y_offset > dst_height)
 504         reg_height = dst_height - dst_y_offset;
 505
 506     if (src_bo == dst_bo) {
 507         return GL_FALSE;
 508     }
 509
 510     if (src_offset % 32 || dst_offset % 32) {
 511         return GL_FALSE;
 512     }
 513
 514     if (0) {
 515         fprintf(stderr, "src: size [%d x %d], pitch %d, "
 516                 "offset [%d x %d], format %s, bo %p\n",
 517                 src_width, src_height, src_pitch,
 518                 src_x_offset, src_y_offset,
 519                 _mesa_get_format_name(src_mesaformat),
 520                 src_bo);
 521         fprintf(stderr, "dst: pitch %d, offset[%d x %d], format %s, bo %p\n",
 522                 dst_pitch, dst_x_offset, dst_y_offset,
 523                 _mesa_get_format_name(dst_mesaformat), dst_bo);
 524         fprintf(stderr, "region: %d x %d\n", reg_width, reg_height);
 525     }
 526
 527     /* Flush is needed to make sure that source buffer has correct data */
 528     radeonFlush(r200->radeon.glCtx);
 529
 530     rcommonEnsureCmdBufSpace(&r200->radeon, 102, __FUNCTION__);
 531
 532     if (!validate_buffers(r200, src_bo, dst_bo))
 533         return GL_FALSE;
 534
 535     /* 14 */
 536     emit_vtx_state(r200);
 537     /* 52 */
 538     emit_tx_setup(r200, src_mesaformat, dst_mesaformat, src_bo, src_offset, src_width, src_height, src_pitch);
 539     /* 22 */
 540     emit_cb_setup(r200, dst_bo, dst_offset, dst_mesaformat, dst_pitch, dst_width, dst_height);
 541     /* 14 */
 542     emit_draw_packet(r200, src_width, src_height,
 543                      src_x_offset, src_y_offset,
 544                      dst_x_offset, dst_y_offset,
 545                      reg_width, reg_height,
 546                      flip_y);
 547
 548     radeonFlush(ctx);
 549
 550     return GL_TRUE;
 551 }