src/mesa/drivers/dri/intel/intel_pixel_draw.c

   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/mtypes.h"
  32 #include "main/macros.h"
  33 #include "main/bufferobj.h"
  34 #include "main/teximage.h"
  35 #include "main/texenv.h"
  36 #include "main/texobj.h"
  37 #include "main/texstate.h"
  38 #include "main/texparam.h"
  39 #include "main/matrix.h"
  40 #include "main/varray.h"
  41 #include "main/attrib.h"
  42 #include "main/enable.h"
  43 #include "main/buffers.h"
  44 #include "main/fbobject.h"
  45 #include "main/renderbuffer.h"
  46 #include "main/depth.h"
  47 #include "main/hash.h"
  48 #include "main/blend.h"
  49 #include "glapi/dispatch.h"
  50 #include "swrast/swrast.h"
  51
  52 #include "intel_screen.h"
  53 #include "intel_context.h"
  54 #include "intel_batchbuffer.h"
  55 #include "intel_blit.h"
  56 #include "intel_buffers.h"
  57 #include "intel_regions.h"
  58 #include "intel_pixel.h"
  59 #include "intel_buffer_objects.h"
  60 #include "intel_fbo.h"
  61
  62 static GLboolean
  63 intel_texture_drawpixels(GLcontext * ctx,
  64                          GLint x, GLint y,
  65                          GLsizei width, GLsizei height,
  66                          GLenum format,
  67                          GLenum type,
  68                          const struct gl_pixelstore_attrib *unpack,
  69                          const GLvoid *pixels)
  70 {
  71    GLuint texname;
  72    GLfloat vertices[4][4];
  73    GLfloat texcoords[4][2];
  74
  75    /* We're going to mess with texturing with no regard to existing texture
  76     * state, so if there is some set up we have to bail.
  77     */
  78    if (ctx->Texture._EnabledUnits != 0) {
  79       if (INTEL_DEBUG & DEBUG_FALLBACKS)
  80          fprintf(stderr, "glDrawPixels() fallback: texturing enabled\n");
  81       return GL_FALSE;
  82    }
  83
  84    /* Can't do textured DrawPixels with a fragment program, unless we were
  85     * to generate a new program that sampled our texture and put the results
  86     * in the fragment color before the user's program started.
  87     */
  88    if (ctx->FragmentProgram.Enabled) {
  89       if (INTEL_DEBUG & DEBUG_FALLBACKS)
  90          fprintf(stderr, "glDrawPixels() fallback: fragment program enabled\n");
  91       return GL_FALSE;
  92    }
  93
  94    /* We don't have a way to generate fragments with stencil values which *
  95     * will set the resulting stencil value.
  96     */
  97    if (format == GL_STENCIL_INDEX)
  98       return GL_FALSE;
  99
 100    /* Check that we can load in a texture this big. */
 101    if (width > (1 << (ctx->Const.MaxTextureLevels - 1)) ||
 102        height > (1 << (ctx->Const.MaxTextureLevels - 1))) {
 103       if (INTEL_DEBUG & DEBUG_FALLBACKS)
 104          fprintf(stderr, "glDrawPixels() fallback: bitmap too large (%dx%d)\n",
 105                  width, height);
 106       return GL_FALSE;
 107    }
 108
 109    /* To do DEPTH_COMPONENT, we would need to change our setup to not draw to
 110     * the color buffer, and sample the texture values into the fragment depth
 111     * in a program.
 112     */
 113    if (format == GL_DEPTH_COMPONENT) {
 114       if (INTEL_DEBUG & DEBUG_FALLBACKS)
 115          fprintf(stderr,
 116                  "glDrawPixels() fallback: format == GL_DEPTH_COMPONENT\n");
 117       return GL_FALSE;
 118    }
 119
 120    _mesa_PushAttrib(GL_ENABLE_BIT | GL_TRANSFORM_BIT | GL_TEXTURE_BIT |
 121                     GL_CURRENT_BIT);
 122    _mesa_PushClientAttrib(GL_CLIENT_VERTEX_ARRAY_BIT);
 123
 124    /* XXX: pixel store stuff */
 125    _mesa_Disable(GL_POLYGON_STIPPLE);
 126
 127    _mesa_ActiveTextureARB(GL_TEXTURE0_ARB);
 128    _mesa_Enable(GL_TEXTURE_2D);
 129    _mesa_GenTextures(1, &texname);
 130    _mesa_BindTexture(GL_TEXTURE_2D, texname);
 131    _mesa_TexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
 132    _mesa_TexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
 133    _mesa_TexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
 134    /*
 135    _mesa_TexEnvf(GL_TEXTURE_ENV, GL_COMBINE_RGB, GL_REPLACE);
 136    _mesa_TexEnvf(GL_TEXTURE_ENV, GL_COMBINE_ALPHA, GL_REPLACE);
 137    */
 138    _mesa_TexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, format,
 139                     type, pixels);
 140
 141    _mesa_MatrixMode(GL_PROJECTION);
 142    _mesa_PushMatrix();
 143    _mesa_LoadIdentity();
 144    _mesa_Ortho(0, ctx->DrawBuffer->Width, 0, ctx->DrawBuffer->Height, 1, -1);
 145
 146    _mesa_MatrixMode(GL_MODELVIEW);
 147    _mesa_PushMatrix();
 148    _mesa_LoadIdentity();
 149
 150    /* Create the vertex buffer based on the current raster pos.  The x and y
 151     * we're handed are ctx->Current.RasterPos[0,1] rounded to integers.
 152     * We also apply the depth.  However, the W component is already multiplied
 153     * into ctx->Current.RasterPos[0,1,2] and we can ignore it at this point.
 154     */
 155    vertices[0][0] = x;
 156    vertices[0][1] = y;
 157    vertices[0][2] = ctx->Current.RasterPos[2];
 158    vertices[0][3] = 1.0;
 159    vertices[1][0] = x + width * ctx->Pixel.ZoomX;
 160    vertices[1][1] = y;
 161    vertices[1][2] = ctx->Current.RasterPos[2];
 162    vertices[1][3] = 1.0;
 163    vertices[2][0] = x + width * ctx->Pixel.ZoomX;
 164    vertices[2][1] = y + height * ctx->Pixel.ZoomY;
 165    vertices[2][2] = ctx->Current.RasterPos[2];
 166    vertices[2][3] = 1.0;
 167    vertices[3][0] = x;
 168    vertices[3][1] = y + height * ctx->Pixel.ZoomY;
 169    vertices[3][2] = ctx->Current.RasterPos[2];
 170    vertices[3][3] = 1.0;
 171
 172    texcoords[0][0] = 0.0;
 173    texcoords[0][1] = 0.0;
 174    texcoords[1][0] = 1.0;
 175    texcoords[1][1] = 0.0;
 176    texcoords[2][0] = 1.0;
 177    texcoords[2][1] = 1.0;
 178    texcoords[3][0] = 0.0;
 179    texcoords[3][1] = 1.0;
 180
 181    _mesa_VertexPointer(4, GL_FLOAT, 4 * sizeof(GLfloat), &vertices);
 182    _mesa_TexCoordPointer(2, GL_FLOAT, 2 * sizeof(GLfloat), &texcoords);
 183    _mesa_Enable(GL_VERTEX_ARRAY);
 184    _mesa_Enable(GL_TEXTURE_COORD_ARRAY);
 185    CALL_DrawArrays(ctx->Exec, (GL_TRIANGLE_FAN, 0, 4));
 186
 187    _mesa_MatrixMode(GL_PROJECTION);
 188    _mesa_PopMatrix();
 189    _mesa_MatrixMode(GL_MODELVIEW);
 190    _mesa_PopMatrix();
 191    _mesa_PopClientAttrib();
 192    _mesa_PopAttrib();
 193
 194    _mesa_DeleteTextures(1, &texname);
 195
 196    return GL_TRUE;
 197 }
 198
 199 static GLboolean
 200 intel_stencil_drawpixels(GLcontext * ctx,
 201                          GLint x, GLint y,
 202                          GLsizei width, GLsizei height,
 203                          GLenum format,
 204                          GLenum type,
 205                          const struct gl_pixelstore_attrib *unpack,
 206                          const GLvoid *pixels)
 207 {
 208    GLuint texname, rb_name, fb_name, old_fb_name;
 209    GLfloat vertices[4][2];
 210    GLfloat texcoords[4][2];
 211    struct intel_renderbuffer *irb;
 212    struct intel_renderbuffer *depth_irb;
 213    struct gl_renderbuffer *rb;
 214    struct gl_pixelstore_attrib old_unpack;
 215    GLstencil *stencil_pixels;
 216    int row;
 217
 218    if (format != GL_STENCIL_INDEX)
 219       return GL_FALSE;
 220
 221    /* If there's nothing to write, we're done. */
 222    if (ctx->Stencil.WriteMask[0] == 0)
 223       return GL_TRUE;
 224
 225    /* Can't do a per-bit writemask while treating stencil as rgba data. */
 226    if ((ctx->Stencil.WriteMask[0] & 0xff) != 0xff) {
 227       if (INTEL_DEBUG & DEBUG_FALLBACKS)
 228          fprintf(stderr, "glDrawPixels(STENCIL_INDEX) fallback: "
 229                  "stencil mask enabled\n");
 230       return GL_FALSE;
 231    }
 232
 233    /* We use FBOs for our wrapping of the depthbuffer into a color
 234     * destination.
 235     */
 236    if (!ctx->Extensions.EXT_framebuffer_object)
 237       return GL_FALSE;
 238
 239    /* We're going to mess with texturing with no regard to existing texture
 240     * state, so if there is some set up we have to bail.
 241     */
 242    if (ctx->Texture._EnabledUnits != 0) {
 243       if (INTEL_DEBUG & DEBUG_FALLBACKS)
 244          fprintf(stderr, "glDrawPixels(STENCIL_INDEX) fallback: "
 245                  "texturing enabled\n");
 246       return GL_FALSE;
 247    }
 248
 249    /* Can't do textured DrawPixels with a fragment program, unless we were
 250     * to generate a new program that sampled our texture and put the results
 251     * in the fragment color before the user's program started.
 252     */
 253    if (ctx->FragmentProgram.Enabled) {
 254       if (INTEL_DEBUG & DEBUG_FALLBACKS)
 255          fprintf(stderr, "glDrawPixels(STENCIL_INDEX) fallback: "
 256                  "fragment program enabled\n");
 257       return GL_FALSE;
 258    }
 259
 260    /* Check that we can load in a texture this big. */
 261    if (width > (1 << (ctx->Const.MaxTextureLevels - 1)) ||
 262        height > (1 << (ctx->Const.MaxTextureLevels - 1))) {
 263       if (INTEL_DEBUG & DEBUG_FALLBACKS)
 264          fprintf(stderr, "glDrawPixels(STENCIL_INDEX) fallback: "
 265                  "bitmap too large (%dx%d)\n",
 266                  width, height);
 267       return GL_FALSE;
 268    }
 269
 270    _mesa_PushAttrib(GL_ENABLE_BIT | GL_TRANSFORM_BIT | GL_TEXTURE_BIT |
 271                     GL_CURRENT_BIT | GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 272    _mesa_PushClientAttrib(GL_CLIENT_VERTEX_ARRAY_BIT);
 273    old_fb_name = ctx->DrawBuffer->Name;
 274
 275    _mesa_Disable(GL_POLYGON_STIPPLE);
 276    _mesa_Disable(GL_DEPTH_TEST);
 277    _mesa_Disable(GL_STENCIL_TEST);
 278
 279    /* Unpack the supplied stencil values into a ubyte buffer. */
 280    assert(sizeof(GLstencil) == sizeof(GLubyte));
 281    stencil_pixels = _mesa_malloc(width * height * sizeof(GLstencil));
 282    for (row = 0; row < height; row++) {
 283       GLvoid *source = _mesa_image_address2d(unpack, pixels,
 284                                              width, height,
 285                                              GL_COLOR_INDEX, type,
 286                                              row, 0);
 287       _mesa_unpack_stencil_span(ctx, width, GL_UNSIGNED_BYTE,
 288                                 stencil_pixels +
 289                                 row * width * sizeof(GLstencil),
 290                                 type, source, unpack, ctx->_ImageTransferState);
 291    }
 292
 293    /* Take the current depth/stencil renderbuffer, and make a new one wrapping
 294     * it which will be treated as GL_RGBA8 so we can render to it as a color
 295     * buffer.
 296     */
 297    depth_irb = intel_get_renderbuffer(ctx->DrawBuffer, BUFFER_DEPTH);
 298    irb = intel_create_renderbuffer(GL_RGBA8);
 299    rb = &irb->Base;
 300    irb->Base.Width = depth_irb->Base.Width;
 301    irb->Base.Height = depth_irb->Base.Height;
 302    intel_renderbuffer_set_region(irb, depth_irb->region);
 303
 304    /* Create a name for our renderbuffer, which lets us use other mesa
 305     * rb functions for convenience.
 306     */
 307    _mesa_GenRenderbuffersEXT(1, &rb_name);
 308    irb->Base.RefCount++;
 309    _mesa_HashInsert(ctx->Shared->RenderBuffers, rb_name, &irb->Base);
 310
 311    /* Bind the new renderbuffer to the color attachment point. */
 312    _mesa_GenFramebuffersEXT(1, &fb_name);
 313    _mesa_BindFramebufferEXT(GL_FRAMEBUFFER_EXT, fb_name);
 314    _mesa_FramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT,
 315                                     GL_COLOR_ATTACHMENT0_EXT,
 316                                     GL_RENDERBUFFER_EXT,
 317                                     rb_name);
 318    /* Choose to render to the color attachment. */
 319    _mesa_DrawBuffer(GL_COLOR_ATTACHMENT0_EXT);
 320
 321    _mesa_DepthMask(GL_FALSE);
 322    _mesa_ColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_TRUE);
 323
 324    _mesa_ActiveTextureARB(GL_TEXTURE0_ARB);
 325    _mesa_Enable(GL_TEXTURE_2D);
 326    _mesa_GenTextures(1, &texname);
 327    _mesa_BindTexture(GL_TEXTURE_2D, texname);
 328    _mesa_TexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
 329    _mesa_TexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
 330    _mesa_TexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
 331    old_unpack = ctx->Unpack;
 332    ctx->Unpack = ctx->DefaultPacking;
 333    _mesa_TexImage2D(GL_TEXTURE_2D, 0, GL_INTENSITY, width, height, 0,
 334                     GL_RED, GL_UNSIGNED_BYTE, stencil_pixels);
 335    ctx->Unpack = old_unpack;
 336    _mesa_free(stencil_pixels);
 337
 338    _mesa_MatrixMode(GL_PROJECTION);
 339    _mesa_PushMatrix();
 340    _mesa_LoadIdentity();
 341    _mesa_Ortho(0, ctx->DrawBuffer->Width, 0, ctx->DrawBuffer->Height, 1, -1);
 342
 343    _mesa_MatrixMode(GL_MODELVIEW);
 344    _mesa_PushMatrix();
 345    _mesa_LoadIdentity();
 346
 347    vertices[0][0] = x;
 348    vertices[0][1] = y;
 349    vertices[1][0] = x + width * ctx->Pixel.ZoomX;
 350    vertices[1][1] = y;
 351    vertices[2][0] = x + width * ctx->Pixel.ZoomX;
 352    vertices[2][1] = y + height * ctx->Pixel.ZoomY;
 353    vertices[3][0] = x;
 354    vertices[3][1] = y + height * ctx->Pixel.ZoomY;
 355
 356    texcoords[0][0] = 0.0;
 357    texcoords[0][1] = 0.0;
 358    texcoords[1][0] = 1.0;
 359    texcoords[1][1] = 0.0;
 360    texcoords[2][0] = 1.0;
 361    texcoords[2][1] = 1.0;
 362    texcoords[3][0] = 0.0;
 363    texcoords[3][1] = 1.0;
 364
 365    _mesa_VertexPointer(2, GL_FLOAT, 2 * sizeof(GLfloat), &vertices);
 366    _mesa_TexCoordPointer(2, GL_FLOAT, 2 * sizeof(GLfloat), &texcoords);
 367    _mesa_Enable(GL_VERTEX_ARRAY);
 368    _mesa_Enable(GL_TEXTURE_COORD_ARRAY);
 369    CALL_DrawArrays(ctx->Exec, (GL_TRIANGLE_FAN, 0, 4));
 370
 371    _mesa_BindFramebufferEXT(GL_FRAMEBUFFER_EXT, old_fb_name);
 372
 373    _mesa_MatrixMode(GL_PROJECTION);
 374    _mesa_PopMatrix();
 375    _mesa_MatrixMode(GL_MODELVIEW);
 376    _mesa_PopMatrix();
 377    _mesa_PopClientAttrib();
 378    _mesa_PopAttrib();
 379
 380    _mesa_DeleteTextures(1, &texname);
 381    _mesa_DeleteFramebuffersEXT(1, &fb_name);
 382    _mesa_DeleteRenderbuffersEXT(1, &rb_name);
 383
 384    return GL_TRUE;
 385 }
 386
 387 void
 388 intelDrawPixels(GLcontext * ctx,
 389                 GLint x, GLint y,
 390                 GLsizei width, GLsizei height,
 391                 GLenum format,
 392                 GLenum type,
 393                 const struct gl_pixelstore_attrib *unpack,
 394                 const GLvoid * pixels)
 395 {
 396    if (intel_texture_drawpixels(ctx, x, y, width, height, format, type,
 397                                 unpack, pixels))
 398       return;
 399
 400    if (intel_stencil_drawpixels(ctx, x, y, width, height, format, type,
 401                                 unpack, pixels))
 402       return;
 403
 404    if (INTEL_DEBUG & DEBUG_PIXEL)
 405       _mesa_printf("%s: fallback to swrast\n", __FUNCTION__);
 406
 407    if (ctx->FragmentProgram._Current == ctx->FragmentProgram._TexEnvProgram) {
 408       /*
 409        * We don't want the i915 texenv program to be applied to DrawPixels.
 410        * This is really just a performance optimization (mesa will other-
 411        * wise happily run the fragment program on each pixel in the image).
 412        */
 413       struct gl_fragment_program *fpSave = ctx->FragmentProgram._Current;
 414    /* can't just set current frag prog to 0 here as on buffer resize
 415       we'll get new state checks which will segfault. Remains a hack. */
 416       ctx->FragmentProgram._Current = NULL;
 417       ctx->FragmentProgram._UseTexEnvProgram = GL_FALSE;
 418       ctx->FragmentProgram._Active = GL_FALSE;
 419       _swrast_DrawPixels( ctx, x, y, width, height, format, type,
 420                           unpack, pixels );
 421       ctx->FragmentProgram._Current = fpSave;
 422       ctx->FragmentProgram._UseTexEnvProgram = GL_TRUE;
 423       ctx->FragmentProgram._Active = GL_TRUE;
 424       _swrast_InvalidateState(ctx, _NEW_PROGRAM);
 425    }
 426    else {
 427       _swrast_DrawPixels( ctx, x, y, width, height, format, type,
 428                           unpack, pixels );
 429    }
 430 }