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 "main/viewport.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    struct intel_context *intel = intel_context(ctx);
  72    GLuint texname;
  73    GLfloat vertices[4][4];
  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 || format == GL_DEPTH_STENCIL)
 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    if (!ctx->Extensions.ARB_texture_non_power_of_two &&
 124        (!is_power_of_two(width) || !is_power_of_two(height))) {
 125       if (INTEL_DEBUG & DEBUG_FALLBACKS)
 126          fprintf(stderr,
 127                  "glDrawPixels() fallback: NPOT texture\n");
 128       return GL_FALSE;
 129    }
 130
 131    _mesa_PushAttrib(GL_ENABLE_BIT | GL_TEXTURE_BIT |
 132                     GL_CURRENT_BIT | GL_VIEWPORT_BIT);
 133    _mesa_PushClientAttrib(GL_CLIENT_VERTEX_ARRAY_BIT);
 134
 135    /* XXX: pixel store stuff */
 136    _mesa_Disable(GL_POLYGON_STIPPLE);
 137
 138    old_active_texture = ctx->Texture.CurrentUnit;
 139    _mesa_ActiveTextureARB(GL_TEXTURE0_ARB);
 140    _mesa_Enable(GL_TEXTURE_2D);
 141    _mesa_GenTextures(1, &texname);
 142    _mesa_BindTexture(GL_TEXTURE_2D, texname);
 143    _mesa_TexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
 144    _mesa_TexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
 145    _mesa_TexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
 146    if (type == GL_ALPHA)
 147       internalFormat = GL_ALPHA;
 148    else
 149       internalFormat = GL_RGBA;
 150    _mesa_TexImage2D(GL_TEXTURE_2D, 0, internalFormat, width, height, 0, format,
 151                     type, pixels);
 152
 153    meta_set_passthrough_transform(&intel->meta);
 154
 155    /* convert rasterpos Z from [0,1] to NDC coord in [-1,1] */
 156    z = -1.0 + 2.0 * ctx->Current.RasterPos[2];
 157
 158    /* RasterPos[2] already takes into account the DepthRange mapping. */
 159    _mesa_DepthRange(0.0, 1.0);
 160
 161    /* Create the vertex buffer based on the current raster pos.  The x and y
 162     * we're handed are ctx->Current.RasterPos[0,1] rounded to integers.
 163     * We also apply the depth.  However, the W component is already multiplied
 164     * into ctx->Current.RasterPos[0,1,2] and we can ignore it at this point.
 165     */
 166    vertices[0][0] = x;
 167    vertices[0][1] = y;
 168    vertices[0][2] = z;
 169    vertices[0][3] = 1.0;
 170    vertices[1][0] = x + width * ctx->Pixel.ZoomX;
 171    vertices[1][1] = y;
 172    vertices[1][2] = z;
 173    vertices[1][3] = 1.0;
 174    vertices[2][0] = x + width * ctx->Pixel.ZoomX;
 175    vertices[2][1] = y + height * ctx->Pixel.ZoomY;
 176    vertices[2][2] = z;
 177    vertices[2][3] = 1.0;
 178    vertices[3][0] = x;
 179    vertices[3][1] = y + height * ctx->Pixel.ZoomY;
 180    vertices[3][2] = z;
 181    vertices[3][3] = 1.0;
 182
 183    _mesa_VertexPointer(4, GL_FLOAT, 4 * sizeof(GLfloat), &vertices);
 184    _mesa_Enable(GL_VERTEX_ARRAY);
 185    meta_set_default_texrect(&intel->meta);
 186
 187    _mesa_DrawArrays(GL_TRIANGLE_FAN, 0, 4);
 188
 189    meta_restore_texcoords(&intel->meta);
 190    meta_restore_transform(&intel->meta);
 191
 192    _mesa_ActiveTextureARB(GL_TEXTURE0_ARB + old_active_texture);
 193    _mesa_PopClientAttrib();
 194    _mesa_PopAttrib();
 195
 196    _mesa_DeleteTextures(1, &texname);
 197
 198    return GL_TRUE;
 199 }
 200
 201 static GLboolean
 202 intel_stencil_drawpixels(GLcontext * ctx,
 203                          GLint x, GLint y,
 204                          GLsizei width, GLsizei height,
 205                          GLenum format,
 206                          GLenum type,
 207                          const struct gl_pixelstore_attrib *unpack,
 208                          const GLvoid *pixels)
 209 {
 210    struct intel_context *intel = intel_context(ctx);
 211    GLuint texname, rb_name, fb_name, old_fb_name;
 212    GLfloat vertices[4][2];
 213    struct intel_renderbuffer *irb;
 214    struct intel_renderbuffer *depth_irb;
 215    struct gl_renderbuffer *rb;
 216    struct gl_pixelstore_attrib old_unpack;
 217    GLstencil *stencil_pixels;
 218    int row, y1, y2;
 219    GLint old_active_texture;
 220    GLboolean rendering_to_fbo = ctx->DrawBuffer->Name != 0;
 221
 222    if (format != GL_STENCIL_INDEX)
 223       return GL_FALSE;
 224
 225    /* If there's nothing to write, we're done. */
 226    if (ctx->Stencil.WriteMask[0] == 0)
 227       return GL_TRUE;
 228
 229    /* Can't do a per-bit writemask while treating stencil as rgba data. */
 230    if ((ctx->Stencil.WriteMask[0] & 0xff) != 0xff) {
 231       if (INTEL_DEBUG & DEBUG_FALLBACKS)
 232          fprintf(stderr, "glDrawPixels(STENCIL_INDEX) fallback: "
 233                  "stencil mask enabled\n");
 234       return GL_FALSE;
 235    }
 236
 237    /* We don't support stencil testing/ops here */
 238    if (ctx->Stencil._Enabled)
 239       return GL_FALSE;
 240
 241    /* We use FBOs for our wrapping of the depthbuffer into a color
 242     * destination.
 243     */
 244    if (!ctx->Extensions.EXT_framebuffer_object)
 245       return GL_FALSE;
 246
 247    /* We're going to mess with texturing with no regard to existing texture
 248     * state, so if there is some set up we have to bail.
 249     */
 250    if (ctx->Texture._EnabledUnits != 0) {
 251       if (INTEL_DEBUG & DEBUG_FALLBACKS)
 252          fprintf(stderr, "glDrawPixels(STENCIL_INDEX) fallback: "
 253                  "texturing enabled\n");
 254       return GL_FALSE;
 255    }
 256
 257    /* Can't do textured DrawPixels with a fragment program, unless we were
 258     * to generate a new program that sampled our texture and put the results
 259     * in the fragment color before the user's program started.
 260     */
 261    if (ctx->FragmentProgram.Enabled) {
 262       if (INTEL_DEBUG & DEBUG_FALLBACKS)
 263          fprintf(stderr, "glDrawPixels(STENCIL_INDEX) fallback: "
 264                  "fragment program enabled\n");
 265       return GL_FALSE;
 266    }
 267
 268    /* Check that we can load in a texture this big. */
 269    if (width > (1 << (ctx->Const.MaxTextureLevels - 1)) ||
 270        height > (1 << (ctx->Const.MaxTextureLevels - 1))) {
 271       if (INTEL_DEBUG & DEBUG_FALLBACKS)
 272          fprintf(stderr, "glDrawPixels(STENCIL_INDEX) fallback: "
 273                  "bitmap too large (%dx%d)\n",
 274                  width, height);
 275       return GL_FALSE;
 276    }
 277
 278    if (!ctx->Extensions.ARB_texture_non_power_of_two &&
 279        (!is_power_of_two(width) || !is_power_of_two(height))) {
 280       if (INTEL_DEBUG & DEBUG_FALLBACKS)
 281          fprintf(stderr,
 282                  "glDrawPixels(GL_STENCIL_INDEX) fallback: NPOT texture\n");
 283       return GL_FALSE;
 284    }
 285
 286    _mesa_PushAttrib(GL_ENABLE_BIT | GL_TEXTURE_BIT |
 287                     GL_CURRENT_BIT | GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 288    _mesa_PushClientAttrib(GL_CLIENT_VERTEX_ARRAY_BIT);
 289    old_fb_name = ctx->DrawBuffer->Name;
 290    old_active_texture = ctx->Texture.CurrentUnit;
 291
 292    _mesa_Disable(GL_POLYGON_STIPPLE);
 293    _mesa_Disable(GL_DEPTH_TEST);
 294    _mesa_Disable(GL_STENCIL_TEST);
 295
 296    /* Unpack the supplied stencil values into a ubyte buffer. */
 297    assert(sizeof(GLstencil) == sizeof(GLubyte));
 298    stencil_pixels = _mesa_malloc(width * height * sizeof(GLstencil));
 299    for (row = 0; row < height; row++) {
 300       GLvoid *source = _mesa_image_address2d(unpack, pixels,
 301                                              width, height,
 302                                              GL_COLOR_INDEX, type,
 303                                              row, 0);
 304       _mesa_unpack_stencil_span(ctx, width, GL_UNSIGNED_BYTE,
 305                                 stencil_pixels +
 306                                 row * width * sizeof(GLstencil),
 307                                 type, source, unpack, ctx->_ImageTransferState);
 308    }
 309
 310    /* Take the current depth/stencil renderbuffer, and make a new one wrapping
 311     * it which will be treated as GL_RGBA8 so we can render to it as a color
 312     * buffer.
 313     */
 314    depth_irb = intel_get_renderbuffer(ctx->DrawBuffer, BUFFER_DEPTH);
 315    irb = intel_create_renderbuffer(GL_RGBA8);
 316    rb = &irb->Base;
 317    irb->Base.Width = depth_irb->Base.Width;
 318    irb->Base.Height = depth_irb->Base.Height;
 319    intel_renderbuffer_set_region(irb, depth_irb->region);
 320
 321    /* Create a name for our renderbuffer, which lets us use other mesa
 322     * rb functions for convenience.
 323     */
 324    _mesa_GenRenderbuffersEXT(1, &rb_name);
 325    irb->Base.RefCount++;
 326    _mesa_HashInsert(ctx->Shared->RenderBuffers, rb_name, &irb->Base);
 327
 328    /* Bind the new renderbuffer to the color attachment point. */
 329    _mesa_GenFramebuffersEXT(1, &fb_name);
 330    _mesa_BindFramebufferEXT(GL_FRAMEBUFFER_EXT, fb_name);
 331    _mesa_FramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT,
 332                                     GL_COLOR_ATTACHMENT0_EXT,
 333                                     GL_RENDERBUFFER_EXT,
 334                                     rb_name);
 335    /* Choose to render to the color attachment. */
 336    _mesa_DrawBuffer(GL_COLOR_ATTACHMENT0_EXT);
 337
 338    _mesa_DepthMask(GL_FALSE);
 339    _mesa_ColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_TRUE);
 340
 341    _mesa_ActiveTextureARB(GL_TEXTURE0_ARB);
 342    _mesa_Enable(GL_TEXTURE_2D);
 343    _mesa_GenTextures(1, &texname);
 344    _mesa_BindTexture(GL_TEXTURE_2D, texname);
 345    _mesa_TexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
 346    _mesa_TexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
 347    _mesa_TexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
 348    old_unpack = ctx->Unpack;
 349    ctx->Unpack = ctx->DefaultPacking;
 350    _mesa_TexImage2D(GL_TEXTURE_2D, 0, GL_INTENSITY, width, height, 0,
 351                     GL_RED, GL_UNSIGNED_BYTE, stencil_pixels);
 352    ctx->Unpack = old_unpack;
 353    _mesa_free(stencil_pixels);
 354
 355    meta_set_passthrough_transform(&intel->meta);
 356
 357    /* Since we're rendering to the framebuffer as if it was an FBO,
 358     * if it's the window system we have to flip the coordinates.
 359     */
 360    if (rendering_to_fbo) {
 361       y1 = y;
 362       y2 = y + height * ctx->Pixel.ZoomY;
 363    } else {
 364       y1 = irb->Base.Height - (y + height * ctx->Pixel.ZoomY);
 365       y2 = irb->Base.Height - y;
 366    }
 367    vertices[0][0] = x;
 368    vertices[0][1] = y1;
 369    vertices[1][0] = x + width * ctx->Pixel.ZoomX;
 370    vertices[1][1] = y1;
 371    vertices[2][0] = x + width * ctx->Pixel.ZoomX;
 372    vertices[2][1] = y2;
 373    vertices[3][0] = x;
 374    vertices[3][1] = y2;
 375
 376    _mesa_VertexPointer(2, GL_FLOAT, 2 * sizeof(GLfloat), &vertices);
 377    _mesa_Enable(GL_VERTEX_ARRAY);
 378    meta_set_default_texrect(&intel->meta);
 379
 380    _mesa_DrawArrays(GL_TRIANGLE_FAN, 0, 4);
 381
 382    meta_restore_texcoords(&intel->meta);
 383    meta_restore_transform(&intel->meta);
 384
 385    _mesa_ActiveTextureARB(GL_TEXTURE0_ARB + old_active_texture);
 386    _mesa_BindFramebufferEXT(GL_FRAMEBUFFER_EXT, old_fb_name);
 387
 388    _mesa_PopClientAttrib();
 389    _mesa_PopAttrib();
 390
 391    _mesa_DeleteTextures(1, &texname);
 392    _mesa_DeleteFramebuffersEXT(1, &fb_name);
 393    _mesa_DeleteRenderbuffersEXT(1, &rb_name);
 394
 395    return GL_TRUE;
 396 }
 397
 398 void
 399 intelDrawPixels(GLcontext * ctx,
 400                 GLint x, GLint y,
 401                 GLsizei width, GLsizei height,
 402                 GLenum format,
 403                 GLenum type,
 404                 const struct gl_pixelstore_attrib *unpack,
 405                 const GLvoid * pixels)
 406 {
 407    if (intel_texture_drawpixels(ctx, x, y, width, height, format, type,
 408                                 unpack, pixels))
 409       return;
 410
 411    if (intel_stencil_drawpixels(ctx, x, y, width, height, format, type,
 412                                 unpack, pixels))
 413       return;
 414
 415    if (INTEL_DEBUG & DEBUG_PIXEL)
 416       _mesa_printf("%s: fallback to swrast\n", __FUNCTION__);
 417
 418    _swrast_DrawPixels(ctx, x, y, width, height, format, type,
 419                       unpack, pixels);
 420 }