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