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/varray.h"
  40 #include "main/attrib.h"
  41 #include "main/enable.h"
  42 #include "main/buffers.h"
  43 #include "main/fbobject.h"
  44 #include "main/renderbuffer.h"
  45 #include "main/depth.h"
  46 #include "main/hash.h"
  47 #include "main/blend.h"
  48 #include "glapi/dispatch.h"
  49 #include "swrast/swrast.h"
  50
  51 #include "intel_screen.h"
  52 #include "intel_context.h"
  53 #include "intel_batchbuffer.h"
  54 #include "intel_blit.h"
  55 #include "intel_buffers.h"
  56 #include "intel_regions.h"
  57 #include "intel_pixel.h"
  58 #include "intel_buffer_objects.h"
  59 #include "intel_fbo.h"
  60
  61 static GLboolean
  62 intel_texture_drawpixels(GLcontext * ctx,
  63                          GLint x, GLint y,
  64                          GLsizei width, GLsizei height,
  65                          GLenum format,
  66                          GLenum type,
  67                          const struct gl_pixelstore_attrib *unpack,
  68                          const GLvoid *pixels)
  69 {
  70    struct intel_context *intel = intel_context(ctx);
  71    GLuint texname;
  72    GLfloat vertices[4][4];
  73    GLfloat texcoords[4][2];
  74    GLfloat z;
  75    GLint old_active_texture;
  76    GLenum internalFormat;
  77
  78    /* We're going to mess with texturing with no regard to existing texture
  79     * state, so if there is some set up we have to bail.
  80     */
  81    if (ctx->Texture._EnabledUnits != 0) {
  82       if (INTEL_DEBUG & DEBUG_FALLBACKS)
  83          fprintf(stderr, "glDrawPixels() fallback: texturing enabled\n");
  84       return GL_FALSE;
  85    }
  86
  87    /* Can't do textured DrawPixels with a fragment program, unless we were
  88     * to generate a new program that sampled our texture and put the results
  89     * in the fragment color before the user's program started.
  90     */
  91    if (ctx->FragmentProgram.Enabled) {
  92       if (INTEL_DEBUG & DEBUG_FALLBACKS)
  93          fprintf(stderr, "glDrawPixels() fallback: fragment program enabled\n");
  94       return GL_FALSE;
  95    }
  96
  97    /* We don't have a way to generate fragments with stencil values which
  98     * will set the resulting stencil value.
  99     */
 100    if (format == GL_STENCIL_INDEX)
 101       return GL_FALSE;
 102
 103    /* Check that we can load in a texture this big. */
 104    if (width > (1 << (ctx->Const.MaxTextureLevels - 1)) ||
 105        height > (1 << (ctx->Const.MaxTextureLevels - 1))) {
 106       if (INTEL_DEBUG & DEBUG_FALLBACKS)
 107          fprintf(stderr, "glDrawPixels() fallback: bitmap too large (%dx%d)\n",
 108                  width, height);
 109       return GL_FALSE;
 110    }
 111
 112    /* To do DEPTH_COMPONENT, we would need to change our setup to not draw to
 113     * the color buffer, and sample the texture values into the fragment depth
 114     * in a program.
 115     */
 116    if (format == GL_DEPTH_COMPONENT) {
 117       if (INTEL_DEBUG & DEBUG_FALLBACKS)
 118          fprintf(stderr,
 119                  "glDrawPixels() fallback: format == GL_DEPTH_COMPONENT\n");
 120       return GL_FALSE;
 121    }
 122
 123    _mesa_PushAttrib(GL_ENABLE_BIT | GL_TEXTURE_BIT |
 124                     GL_CURRENT_BIT);
 125    _mesa_PushClientAttrib(GL_CLIENT_VERTEX_ARRAY_BIT);
 126
 127    /* XXX: pixel store stuff */
 128    _mesa_Disable(GL_POLYGON_STIPPLE);
 129
 130    old_active_texture = ctx->Texture.CurrentUnit;
 131    _mesa_ActiveTextureARB(GL_TEXTURE0_ARB);
 132    _mesa_Enable(GL_TEXTURE_2D);
 133    _mesa_GenTextures(1, &texname);
 134    _mesa_BindTexture(GL_TEXTURE_2D, texname);
 135    _mesa_TexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
 136    _mesa_TexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
 137    _mesa_TexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
 138    if (type == GL_ALPHA)
 139       internalFormat = GL_ALPHA;
 140    else
 141       internalFormat = GL_RGBA;
 142    _mesa_TexImage2D(GL_TEXTURE_2D, 0, internalFormat, width, height, 0, format,
 143                     type, pixels);
 144
 145    intel_meta_set_passthrough_transform(intel);
 146
 147    /* convert rasterpos Z from [0,1] to NDC coord in [-1,1] */
 148    z = -1.0 + 2.0 * ctx->Current.RasterPos[2];
 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] = z;
 158    vertices[0][3] = 1.0;
 159    vertices[1][0] = x + width * ctx->Pixel.ZoomX;
 160    vertices[1][1] = y;
 161    vertices[1][2] = z;
 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] = z;
 166    vertices[2][3] = 1.0;
 167    vertices[3][0] = x;
 168    vertices[3][1] = y + height * ctx->Pixel.ZoomY;
 169    vertices[3][2] = z;
 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_ClientActiveTextureARB(GL_TEXTURE0);
 183    _mesa_TexCoordPointer(2, GL_FLOAT, 2 * sizeof(GLfloat), &texcoords);
 184    _mesa_Enable(GL_VERTEX_ARRAY);
 185    _mesa_Enable(GL_TEXTURE_COORD_ARRAY);
 186    CALL_DrawArrays(ctx->Exec, (GL_TRIANGLE_FAN, 0, 4));
 187
 188    intel_meta_restore_transform(intel);
 189
 190    _mesa_ActiveTextureARB(GL_TEXTURE0_ARB + old_active_texture);
 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    struct intel_context *intel = intel_context(ctx);
 209    GLuint texname, rb_name, fb_name, old_fb_name;
 210    GLfloat vertices[4][2];
 211    GLfloat texcoords[4][2];
 212    struct intel_renderbuffer *irb;
 213    struct intel_renderbuffer *depth_irb;
 214    struct gl_renderbuffer *rb;
 215    struct gl_pixelstore_attrib old_unpack;
 216    GLstencil *stencil_pixels;
 217    int row;
 218    GLint old_active_texture;
 219
 220    if (format != GL_STENCIL_INDEX)
 221       return GL_FALSE;
 222
 223    /* If there's nothing to write, we're done. */
 224    if (ctx->Stencil.WriteMask[0] == 0)
 225       return GL_TRUE;
 226
 227    /* Can't do a per-bit writemask while treating stencil as rgba data. */
 228    if ((ctx->Stencil.WriteMask[0] & 0xff) != 0xff) {
 229       if (INTEL_DEBUG & DEBUG_FALLBACKS)
 230          fprintf(stderr, "glDrawPixels(STENCIL_INDEX) fallback: "
 231                  "stencil mask enabled\n");
 232       return GL_FALSE;
 233    }
 234
 235    /* We don't support stencil testing/ops here */
 236    if (ctx->Stencil._Enabled)
 237       return GL_FALSE;
 238
 239    /* We use FBOs for our wrapping of the depthbuffer into a color
 240     * destination.
 241     */
 242    if (!ctx->Extensions.EXT_framebuffer_object)
 243       return GL_FALSE;
 244
 245    /* We're going to mess with texturing with no regard to existing texture
 246     * state, so if there is some set up we have to bail.
 247     */
 248    if (ctx->Texture._EnabledUnits != 0) {
 249       if (INTEL_DEBUG & DEBUG_FALLBACKS)
 250          fprintf(stderr, "glDrawPixels(STENCIL_INDEX) fallback: "
 251                  "texturing enabled\n");
 252       return GL_FALSE;
 253    }
 254
 255    /* Can't do textured DrawPixels with a fragment program, unless we were
 256     * to generate a new program that sampled our texture and put the results
 257     * in the fragment color before the user's program started.
 258     */
 259    if (ctx->FragmentProgram.Enabled) {
 260       if (INTEL_DEBUG & DEBUG_FALLBACKS)
 261          fprintf(stderr, "glDrawPixels(STENCIL_INDEX) fallback: "
 262                  "fragment program enabled\n");
 263       return GL_FALSE;
 264    }
 265
 266    /* Check that we can load in a texture this big. */
 267    if (width > (1 << (ctx->Const.MaxTextureLevels - 1)) ||
 268        height > (1 << (ctx->Const.MaxTextureLevels - 1))) {
 269       if (INTEL_DEBUG & DEBUG_FALLBACKS)
 270          fprintf(stderr, "glDrawPixels(STENCIL_INDEX) fallback: "
 271                  "bitmap too large (%dx%d)\n",
 272                  width, height);
 273       return GL_FALSE;
 274    }
 275
 276    _mesa_PushAttrib(GL_ENABLE_BIT | GL_TEXTURE_BIT |
 277                     GL_CURRENT_BIT | GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 278    _mesa_PushClientAttrib(GL_CLIENT_VERTEX_ARRAY_BIT);
 279    old_fb_name = ctx->DrawBuffer->Name;
 280    old_active_texture = ctx->Texture.CurrentUnit;
 281
 282    _mesa_Disable(GL_POLYGON_STIPPLE);
 283    _mesa_Disable(GL_DEPTH_TEST);
 284    _mesa_Disable(GL_STENCIL_TEST);
 285
 286    /* Unpack the supplied stencil values into a ubyte buffer. */
 287    assert(sizeof(GLstencil) == sizeof(GLubyte));
 288    stencil_pixels = _mesa_malloc(width * height * sizeof(GLstencil));
 289    for (row = 0; row < height; row++) {
 290       GLvoid *source = _mesa_image_address2d(unpack, pixels,
 291                                              width, height,
 292                                              GL_COLOR_INDEX, type,
 293                                              row, 0);
 294       _mesa_unpack_stencil_span(ctx, width, GL_UNSIGNED_BYTE,
 295                                 stencil_pixels +
 296                                 row * width * sizeof(GLstencil),
 297                                 type, source, unpack, ctx->_ImageTransferState);
 298    }
 299
 300    /* Take the current depth/stencil renderbuffer, and make a new one wrapping
 301     * it which will be treated as GL_RGBA8 so we can render to it as a color
 302     * buffer.
 303     */
 304    depth_irb = intel_get_renderbuffer(ctx->DrawBuffer, BUFFER_DEPTH);
 305    irb = intel_create_renderbuffer(GL_RGBA8);
 306    rb = &irb->Base;
 307    irb->Base.Width = depth_irb->Base.Width;
 308    irb->Base.Height = depth_irb->Base.Height;
 309    intel_renderbuffer_set_region(irb, depth_irb->region);
 310
 311    /* Create a name for our renderbuffer, which lets us use other mesa
 312     * rb functions for convenience.
 313     */
 314    _mesa_GenRenderbuffersEXT(1, &rb_name);
 315    irb->Base.RefCount++;
 316    _mesa_HashInsert(ctx->Shared->RenderBuffers, rb_name, &irb->Base);
 317
 318    /* Bind the new renderbuffer to the color attachment point. */
 319    _mesa_GenFramebuffersEXT(1, &fb_name);
 320    _mesa_BindFramebufferEXT(GL_FRAMEBUFFER_EXT, fb_name);
 321    _mesa_FramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT,
 322                                     GL_COLOR_ATTACHMENT0_EXT,
 323                                     GL_RENDERBUFFER_EXT,
 324                                     rb_name);
 325    /* Choose to render to the color attachment. */
 326    _mesa_DrawBuffer(GL_COLOR_ATTACHMENT0_EXT);
 327
 328    _mesa_DepthMask(GL_FALSE);
 329    _mesa_ColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_TRUE);
 330
 331    _mesa_ActiveTextureARB(GL_TEXTURE0_ARB);
 332    _mesa_Enable(GL_TEXTURE_2D);
 333    _mesa_GenTextures(1, &texname);
 334    _mesa_BindTexture(GL_TEXTURE_2D, texname);
 335    _mesa_TexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
 336    _mesa_TexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
 337    _mesa_TexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
 338    old_unpack = ctx->Unpack;
 339    ctx->Unpack = ctx->DefaultPacking;
 340    _mesa_TexImage2D(GL_TEXTURE_2D, 0, GL_INTENSITY, width, height, 0,
 341                     GL_RED, GL_UNSIGNED_BYTE, stencil_pixels);
 342    ctx->Unpack = old_unpack;
 343    _mesa_free(stencil_pixels);
 344
 345    intel_meta_set_passthrough_transform(intel);
 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_ClientActiveTextureARB(GL_TEXTURE0);
 367    _mesa_TexCoordPointer(2, GL_FLOAT, 2 * sizeof(GLfloat), &texcoords);
 368    _mesa_Enable(GL_VERTEX_ARRAY);
 369    _mesa_Enable(GL_TEXTURE_COORD_ARRAY);
 370    CALL_DrawArrays(ctx->Exec, (GL_TRIANGLE_FAN, 0, 4));
 371
 372    intel_meta_restore_transform(intel);
 373
 374    _mesa_ActiveTextureARB(GL_TEXTURE0_ARB + old_active_texture);
 375    _mesa_BindFramebufferEXT(GL_FRAMEBUFFER_EXT, old_fb_name);
 376
 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    _swrast_DrawPixels(ctx, x, y, width, height, format, type,
 408                       unpack, pixels);
 409 }