intel_pixel_bitmap.c revision 8d68a90e225d831a395ba788e425cb717eec1f9a
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/bufferobj.h" 35#include "main/state.h" 36#include "main/texobj.h" 37#include "main/context.h" 38#include "swrast/swrast.h" 39#include "drivers/common/meta.h" 40 41#include "intel_screen.h" 42#include "intel_context.h" 43#include "intel_batchbuffer.h" 44#include "intel_blit.h" 45#include "intel_regions.h" 46#include "intel_buffers.h" 47#include "intel_pixel.h" 48#include "intel_reg.h" 49 50 51#define FILE_DEBUG_FLAG DEBUG_PIXEL 52 53 54/* Unlike the other intel_pixel_* functions, the expectation here is 55 * that the incoming data is not in a PBO. With the XY_TEXT blit 56 * method, there's no benefit haveing it in a PBO, but we could 57 * implement a path based on XY_MONO_SRC_COPY_BLIT which might benefit 58 * PBO bitmaps. I think they are probably pretty rare though - I 59 * wonder if Xgl uses them? 60 */ 61static const GLubyte *map_pbo( struct gl_context *ctx, 62 GLsizei width, GLsizei height, 63 const struct gl_pixelstore_attrib *unpack, 64 const GLubyte *bitmap ) 65{ 66 GLubyte *buf; 67 68 if (!_mesa_validate_pbo_access(2, unpack, width, height, 1, 69 GL_COLOR_INDEX, GL_BITMAP, 70 (GLvoid *) bitmap)) { 71 _mesa_error(ctx, GL_INVALID_OPERATION,"glBitmap(invalid PBO access)"); 72 return NULL; 73 } 74 75 buf = (GLubyte *) ctx->Driver.MapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT, 76 GL_READ_ONLY_ARB, 77 unpack->BufferObj); 78 if (!buf) { 79 _mesa_error(ctx, GL_INVALID_OPERATION, "glBitmap(PBO is mapped)"); 80 return NULL; 81 } 82 83 return ADD_POINTERS(buf, bitmap); 84} 85 86static GLboolean test_bit( const GLubyte *src, GLuint bit ) 87{ 88 return (src[bit/8] & (1<<(bit % 8))) ? 1 : 0; 89} 90 91static void set_bit( GLubyte *dest, GLuint bit ) 92{ 93 dest[bit/8] |= 1 << (bit % 8); 94} 95 96/* Extract a rectangle's worth of data from the bitmap. Called 97 * per chunk of HW-sized bitmap. 98 */ 99static GLuint get_bitmap_rect(GLsizei width, GLsizei height, 100 const struct gl_pixelstore_attrib *unpack, 101 const GLubyte *bitmap, 102 GLuint x, GLuint y, 103 GLuint w, GLuint h, 104 GLubyte *dest, 105 GLuint row_align, 106 GLboolean invert) 107{ 108 GLuint src_offset = (x + unpack->SkipPixels) & 0x7; 109 GLuint mask = unpack->LsbFirst ? 0 : 7; 110 GLuint bit = 0; 111 GLint row, col; 112 GLint first, last; 113 GLint incr; 114 GLuint count = 0; 115 116 DBG("%s %d,%d %dx%d bitmap %dx%d skip %d src_offset %d mask %d\n", 117 __FUNCTION__, x,y,w,h,width,height,unpack->SkipPixels, src_offset, mask); 118 119 if (invert) { 120 first = h-1; 121 last = 0; 122 incr = -1; 123 } 124 else { 125 first = 0; 126 last = h-1; 127 incr = 1; 128 } 129 130 /* Require that dest be pre-zero'd. 131 */ 132 for (row = first; row != (last+incr); row += incr) { 133 const GLubyte *rowsrc = _mesa_image_address2d(unpack, bitmap, 134 width, height, 135 GL_COLOR_INDEX, GL_BITMAP, 136 y + row, x); 137 138 for (col = 0; col < w; col++, bit++) { 139 if (test_bit(rowsrc, (col + src_offset) ^ mask)) { 140 set_bit(dest, bit ^ 7); 141 count++; 142 } 143 } 144 145 if (row_align) 146 bit = ALIGN(bit, row_align); 147 } 148 149 return count; 150} 151 152/** 153 * Returns the low Y value of the vertical range given, flipped according to 154 * whether the framebuffer is or not. 155 */ 156static INLINE int 157y_flip(struct gl_framebuffer *fb, int y, int height) 158{ 159 if (fb->Name != 0) 160 return y; 161 else 162 return fb->Height - y - height; 163} 164 165/* 166 * Render a bitmap. 167 */ 168static GLboolean 169do_blit_bitmap( struct gl_context *ctx, 170 GLint dstx, GLint dsty, 171 GLsizei width, GLsizei height, 172 const struct gl_pixelstore_attrib *unpack, 173 const GLubyte *bitmap ) 174{ 175 struct intel_context *intel = intel_context(ctx); 176 struct intel_region *dst = intel_drawbuf_region(intel); 177 struct gl_framebuffer *fb = ctx->DrawBuffer; 178 GLfloat tmpColor[4]; 179 GLubyte ubcolor[4]; 180 GLuint color; 181 GLsizei bitmap_width = width; 182 GLsizei bitmap_height = height; 183 GLint px, py; 184 GLuint stipple[32]; 185 GLint orig_dstx = dstx; 186 GLint orig_dsty = dsty; 187 188 /* Update draw buffer bounds */ 189 _mesa_update_state(ctx); 190 191 if (ctx->Depth.Test) { 192 /* The blit path produces incorrect results when depth testing is on. 193 * It seems the blit Z coord is always 1.0 (the far plane) so fragments 194 * will likely be obscured by other, closer geometry. 195 */ 196 return GL_FALSE; 197 } 198 199 if (!dst) 200 return GL_FALSE; 201 202 if (_mesa_is_bufferobj(unpack->BufferObj)) { 203 bitmap = map_pbo(ctx, width, height, unpack, bitmap); 204 if (bitmap == NULL) 205 return GL_TRUE; /* even though this is an error, we're done */ 206 } 207 208 COPY_4V(tmpColor, ctx->Current.RasterColor); 209 210 if (NEED_SECONDARY_COLOR(ctx)) { 211 ADD_3V(tmpColor, tmpColor, ctx->Current.RasterSecondaryColor); 212 } 213 214 UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[0], tmpColor[0]); 215 UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[1], tmpColor[1]); 216 UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[2], tmpColor[2]); 217 UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[3], tmpColor[3]); 218 219 if (dst->cpp == 2) 220 color = PACK_COLOR_565(ubcolor[0], ubcolor[1], ubcolor[2]); 221 else 222 color = PACK_COLOR_8888(ubcolor[3], ubcolor[0], ubcolor[1], ubcolor[2]); 223 224 if (!intel_check_blit_fragment_ops(ctx, tmpColor[3] == 1.0F)) 225 return GL_FALSE; 226 227 intel_prepare_render(intel); 228 229 /* Clip to buffer bounds and scissor. */ 230 if (!_mesa_clip_to_region(fb->_Xmin, fb->_Ymin, 231 fb->_Xmax, fb->_Ymax, 232 &dstx, &dsty, &width, &height)) 233 goto out; 234 235 dsty = y_flip(fb, dsty, height); 236 237#define DY 32 238#define DX 32 239 240 /* Chop it all into chunks that can be digested by hardware: */ 241 for (py = 0; py < height; py += DY) { 242 for (px = 0; px < width; px += DX) { 243 int h = MIN2(DY, height - py); 244 int w = MIN2(DX, width - px); 245 GLuint sz = ALIGN(ALIGN(w,8) * h, 64)/8; 246 GLenum logic_op = ctx->Color.ColorLogicOpEnabled ? 247 ctx->Color.LogicOp : GL_COPY; 248 249 assert(sz <= sizeof(stipple)); 250 memset(stipple, 0, sz); 251 252 /* May need to adjust this when padding has been introduced in 253 * sz above: 254 * 255 * Have to translate destination coordinates back into source 256 * coordinates. 257 */ 258 if (get_bitmap_rect(bitmap_width, bitmap_height, unpack, 259 bitmap, 260 -orig_dstx + (dstx + px), 261 -orig_dsty + y_flip(fb, dsty + py, h), 262 w, h, 263 (GLubyte *)stipple, 264 8, 265 fb->Name == 0 ? GL_TRUE : GL_FALSE) == 0) 266 continue; 267 268 if (!intelEmitImmediateColorExpandBlit(intel, 269 dst->cpp, 270 (GLubyte *)stipple, 271 sz, 272 color, 273 dst->pitch, 274 dst->buffer, 275 0, 276 dst->tiling, 277 dstx + px, 278 dsty + py, 279 w, h, 280 logic_op)) { 281 return GL_FALSE; 282 } 283 } 284 } 285out: 286 287 if (unlikely(INTEL_DEBUG & DEBUG_SYNC)) 288 intel_batchbuffer_flush(intel); 289 290 if (_mesa_is_bufferobj(unpack->BufferObj)) { 291 /* done with PBO so unmap it now */ 292 ctx->Driver.UnmapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT, 293 unpack->BufferObj); 294 } 295 296 intel_check_front_buffer_rendering(intel); 297 298 return GL_TRUE; 299} 300 301 302/* There are a large number of possible ways to implement bitmap on 303 * this hardware, most of them have some sort of drawback. Here are a 304 * few that spring to mind: 305 * 306 * Blit: 307 * - XY_MONO_SRC_BLT_CMD 308 * - use XY_SETUP_CLIP_BLT for cliprect clipping. 309 * - XY_TEXT_BLT 310 * - XY_TEXT_IMMEDIATE_BLT 311 * - blit per cliprect, subject to maximum immediate data size. 312 * - XY_COLOR_BLT 313 * - per pixel or run of pixels 314 * - XY_PIXEL_BLT 315 * - good for sparse bitmaps 316 * 317 * 3D engine: 318 * - Point per pixel 319 * - Translate bitmap to an alpha texture and render as a quad 320 * - Chop bitmap up into 32x32 squares and render w/polygon stipple. 321 */ 322void 323intelBitmap(struct gl_context * ctx, 324 GLint x, GLint y, 325 GLsizei width, GLsizei height, 326 const struct gl_pixelstore_attrib *unpack, 327 const GLubyte * pixels) 328{ 329 struct intel_context *intel = intel_context(ctx); 330 331 if (do_blit_bitmap(ctx, x, y, width, height, 332 unpack, pixels)) 333 return; 334 335 /* FIXME */ 336 if (intel->gen == 6) 337 return _swrast_Bitmap(ctx, x, y, width, height, unpack, pixels); 338 339 _mesa_meta_Bitmap(ctx, x, y, width, height, unpack, pixels); 340} 341