intel_pixel_bitmap.c revision decc6e2a32ef49e673c081f30e19b8970155d887
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/mtypes.h" 33#include "main/macros.h" 34#include "main/pbo.h" 35#include "main/bufferobj.h" 36#include "main/state.h" 37#include "main/texobj.h" 38#include "main/context.h" 39#include "swrast/swrast.h" 40#include "drivers/common/meta.h" 41 42#include "intel_screen.h" 43#include "intel_context.h" 44#include "intel_batchbuffer.h" 45#include "intel_blit.h" 46#include "intel_regions.h" 47#include "intel_buffers.h" 48#include "intel_pixel.h" 49#include "intel_reg.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 */ 62static const GLubyte *map_pbo( struct gl_context *ctx, 63 GLsizei width, GLsizei height, 64 const struct gl_pixelstore_attrib *unpack, 65 const GLubyte *bitmap ) 66{ 67 GLubyte *buf; 68 69 if (!_mesa_validate_pbo_access(2, unpack, width, height, 1, 70 GL_COLOR_INDEX, GL_BITMAP, 71 (GLvoid *) bitmap)) { 72 _mesa_error(ctx, GL_INVALID_OPERATION,"glBitmap(invalid PBO access)"); 73 return NULL; 74 } 75 76 buf = (GLubyte *) ctx->Driver.MapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT, 77 GL_READ_ONLY_ARB, 78 unpack->BufferObj); 79 if (!buf) { 80 _mesa_error(ctx, GL_INVALID_OPERATION, "glBitmap(PBO is mapped)"); 81 return NULL; 82 } 83 84 return ADD_POINTERS(buf, bitmap); 85} 86 87static GLboolean test_bit( const GLubyte *src, GLuint bit ) 88{ 89 return (src[bit/8] & (1<<(bit % 8))) ? 1 : 0; 90} 91 92static void set_bit( GLubyte *dest, GLuint bit ) 93{ 94 dest[bit/8] |= 1 << (bit % 8); 95} 96 97/* Extract a rectangle's worth of data from the bitmap. Called 98 * per chunk of HW-sized bitmap. 99 */ 100static GLuint get_bitmap_rect(GLsizei width, GLsizei height, 101 const struct gl_pixelstore_attrib *unpack, 102 const GLubyte *bitmap, 103 GLuint x, GLuint y, 104 GLuint w, GLuint h, 105 GLubyte *dest, 106 GLuint row_align, 107 GLboolean invert) 108{ 109 GLuint src_offset = (x + unpack->SkipPixels) & 0x7; 110 GLuint mask = unpack->LsbFirst ? 0 : 7; 111 GLuint bit = 0; 112 GLint row, col; 113 GLint first, last; 114 GLint incr; 115 GLuint count = 0; 116 117 DBG("%s %d,%d %dx%d bitmap %dx%d skip %d src_offset %d mask %d\n", 118 __FUNCTION__, x,y,w,h,width,height,unpack->SkipPixels, src_offset, mask); 119 120 if (invert) { 121 first = h-1; 122 last = 0; 123 incr = -1; 124 } 125 else { 126 first = 0; 127 last = h-1; 128 incr = 1; 129 } 130 131 /* Require that dest be pre-zero'd. 132 */ 133 for (row = first; row != (last+incr); row += incr) { 134 const GLubyte *rowsrc = _mesa_image_address2d(unpack, bitmap, 135 width, height, 136 GL_COLOR_INDEX, GL_BITMAP, 137 y + row, x); 138 139 for (col = 0; col < w; col++, bit++) { 140 if (test_bit(rowsrc, (col + src_offset) ^ mask)) { 141 set_bit(dest, bit ^ 7); 142 count++; 143 } 144 } 145 146 if (row_align) 147 bit = ALIGN(bit, row_align); 148 } 149 150 return count; 151} 152 153/** 154 * Returns the low Y value of the vertical range given, flipped according to 155 * whether the framebuffer is or not. 156 */ 157static INLINE int 158y_flip(struct gl_framebuffer *fb, int y, int height) 159{ 160 if (fb->Name != 0) 161 return y; 162 else 163 return fb->Height - y - height; 164} 165 166/* 167 * Render a bitmap. 168 */ 169static GLboolean 170do_blit_bitmap( struct gl_context *ctx, 171 GLint dstx, GLint dsty, 172 GLsizei width, GLsizei height, 173 const struct gl_pixelstore_attrib *unpack, 174 const GLubyte *bitmap ) 175{ 176 struct intel_context *intel = intel_context(ctx); 177 struct intel_region *dst = intel_drawbuf_region(intel); 178 struct gl_framebuffer *fb = ctx->DrawBuffer; 179 GLfloat tmpColor[4]; 180 GLubyte ubcolor[4]; 181 GLuint color; 182 GLsizei bitmap_width = width; 183 GLsizei bitmap_height = height; 184 GLint px, py; 185 GLuint stipple[32]; 186 GLint orig_dstx = dstx; 187 GLint orig_dsty = dsty; 188 189 /* Update draw buffer bounds */ 190 _mesa_update_state(ctx); 191 192 if (ctx->Depth.Test) { 193 /* The blit path produces incorrect results when depth testing is on. 194 * It seems the blit Z coord is always 1.0 (the far plane) so fragments 195 * will likely be obscured by other, closer geometry. 196 */ 197 return GL_FALSE; 198 } 199 200 if (!dst) 201 return GL_FALSE; 202 203 if (_mesa_is_bufferobj(unpack->BufferObj)) { 204 bitmap = map_pbo(ctx, width, height, unpack, bitmap); 205 if (bitmap == NULL) 206 return GL_TRUE; /* even though this is an error, we're done */ 207 } 208 209 COPY_4V(tmpColor, ctx->Current.RasterColor); 210 211 if (_mesa_need_secondary_color(ctx)) { 212 ADD_3V(tmpColor, tmpColor, ctx->Current.RasterSecondaryColor); 213 } 214 215 UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[0], tmpColor[0]); 216 UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[1], tmpColor[1]); 217 UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[2], tmpColor[2]); 218 UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[3], tmpColor[3]); 219 220 if (dst->cpp == 2) 221 color = PACK_COLOR_565(ubcolor[0], ubcolor[1], ubcolor[2]); 222 else 223 color = PACK_COLOR_8888(ubcolor[3], ubcolor[0], ubcolor[1], ubcolor[2]); 224 225 if (!intel_check_blit_fragment_ops(ctx, tmpColor[3] == 1.0F)) 226 return GL_FALSE; 227 228 intel_prepare_render(intel); 229 230 /* Clip to buffer bounds and scissor. */ 231 if (!_mesa_clip_to_region(fb->_Xmin, fb->_Ymin, 232 fb->_Xmax, fb->_Ymax, 233 &dstx, &dsty, &width, &height)) 234 goto out; 235 236 dsty = y_flip(fb, dsty, height); 237 238#define DY 32 239#define DX 32 240 241 /* Chop it all into chunks that can be digested by hardware: */ 242 for (py = 0; py < height; py += DY) { 243 for (px = 0; px < width; px += DX) { 244 int h = MIN2(DY, height - py); 245 int w = MIN2(DX, width - px); 246 GLuint sz = ALIGN(ALIGN(w,8) * h, 64)/8; 247 GLenum logic_op = ctx->Color.ColorLogicOpEnabled ? 248 ctx->Color.LogicOp : GL_COPY; 249 250 assert(sz <= sizeof(stipple)); 251 memset(stipple, 0, sz); 252 253 /* May need to adjust this when padding has been introduced in 254 * sz above: 255 * 256 * Have to translate destination coordinates back into source 257 * coordinates. 258 */ 259 if (get_bitmap_rect(bitmap_width, bitmap_height, unpack, 260 bitmap, 261 -orig_dstx + (dstx + px), 262 -orig_dsty + y_flip(fb, dsty + py, h), 263 w, h, 264 (GLubyte *)stipple, 265 8, 266 fb->Name == 0 ? GL_TRUE : GL_FALSE) == 0) 267 continue; 268 269 if (!intelEmitImmediateColorExpandBlit(intel, 270 dst->cpp, 271 (GLubyte *)stipple, 272 sz, 273 color, 274 dst->pitch, 275 dst->buffer, 276 0, 277 dst->tiling, 278 dstx + px, 279 dsty + py, 280 w, h, 281 logic_op)) { 282 return GL_FALSE; 283 } 284 } 285 } 286out: 287 288 if (unlikely(INTEL_DEBUG & DEBUG_SYNC)) 289 intel_batchbuffer_flush(intel); 290 291 if (_mesa_is_bufferobj(unpack->BufferObj)) { 292 /* done with PBO so unmap it now */ 293 ctx->Driver.UnmapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT, 294 unpack->BufferObj); 295 } 296 297 intel_check_front_buffer_rendering(intel); 298 299 return GL_TRUE; 300} 301 302 303/* There are a large number of possible ways to implement bitmap on 304 * this hardware, most of them have some sort of drawback. Here are a 305 * few that spring to mind: 306 * 307 * Blit: 308 * - XY_MONO_SRC_BLT_CMD 309 * - use XY_SETUP_CLIP_BLT for cliprect clipping. 310 * - XY_TEXT_BLT 311 * - XY_TEXT_IMMEDIATE_BLT 312 * - blit per cliprect, subject to maximum immediate data size. 313 * - XY_COLOR_BLT 314 * - per pixel or run of pixels 315 * - XY_PIXEL_BLT 316 * - good for sparse bitmaps 317 * 318 * 3D engine: 319 * - Point per pixel 320 * - Translate bitmap to an alpha texture and render as a quad 321 * - Chop bitmap up into 32x32 squares and render w/polygon stipple. 322 */ 323void 324intelBitmap(struct gl_context * ctx, 325 GLint x, GLint y, 326 GLsizei width, GLsizei height, 327 const struct gl_pixelstore_attrib *unpack, 328 const GLubyte * pixels) 329{ 330 struct intel_context *intel = intel_context(ctx); 331 332 if (do_blit_bitmap(ctx, x, y, width, height, 333 unpack, pixels)) 334 return; 335 336 /* FIXME */ 337 if (intel->gen == 6) 338 return _swrast_Bitmap(ctx, x, y, width, height, unpack, pixels); 339 340 _mesa_meta_Bitmap(ctx, x, y, width, height, unpack, pixels); 341} 342