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 z;
  74    GLint old_active_texture;
  75    GLenum internalFormat;
  76
  77    /* We're going to mess with texturing with no regard to existing texture
  78     * state, so if there is some set up we have to bail.
  79     */
  80    if (ctx->Texture._EnabledUnits != 0) {
  81       if (INTEL_DEBUG & DEBUG_FALLBACKS)
  82          fprintf(stderr, "glDrawPixels() fallback: texturing enabled\n");
  83       return GL_FALSE;
  84    }
  85
  86    /* Can't do textured DrawPixels with a fragment program, unless we were
  87     * to generate a new program that sampled our texture and put the results
  88     * in the fragment color before the user's program started.
  89     */
  90    if (ctx->FragmentProgram.Enabled) {
  91       if (INTEL_DEBUG & DEBUG_FALLBACKS)
  92          fprintf(stderr, "glDrawPixels() fallback: fragment program enabled\n");
  93       return GL_FALSE;
  94    }
  95
  96    /* We don't have a way to generate fragments with stencil values which
  97     * will set the resulting stencil value.
  98     */
  99    if (format == GL_STENCIL_INDEX || format == GL_DEPTH_STENCIL)
 100       return GL_FALSE;
 101
 102    /* Check that we can load in a texture this big. */
 103    if (width > (1 << (ctx->Const.MaxTextureLevels - 1)) ||
 104        height > (1 << (ctx->Const.MaxTextureLevels - 1))) {
 105       if (INTEL_DEBUG & DEBUG_FALLBACKS)
 106          fprintf(stderr, "glDrawPixels() fallback: bitmap too large (%dx%d)\n",
 107                  width, height);
 108       return GL_FALSE;
 109    }
 110
 111    /* To do DEPTH_COMPONENT, we would need to change our setup to not draw to
 112     * the color buffer, and sample the texture values into the fragment depth
 113     * in a program.
 114     */
 115    if (format == GL_DEPTH_COMPONENT) {
 116       if (INTEL_DEBUG & DEBUG_FALLBACKS)
 117          fprintf(stderr,
 118                  "glDrawPixels() fallback: format == GL_DEPTH_COMPONENT\n");
 119       return GL_FALSE;
 120    }
 121
 122    if (!ctx->Extensions.ARB_texture_non_power_of_two &&
 123        (!is_power_of_two(width) || !is_power_of_two(height))) {
 124       if (INTEL_DEBUG & DEBUG_FALLBACKS)
 125          fprintf(stderr,
 126                  "glDrawPixels() fallback: NPOT texture\n");
 127       return GL_FALSE;
 128    }
 129
 130    _mesa_PushAttrib(GL_ENABLE_BIT | GL_TEXTURE_BIT |
 131                     GL_CURRENT_BIT);
 132    _mesa_PushClientAttrib(GL_CLIENT_VERTEX_ARRAY_BIT);
 133
 134    /* XXX: pixel store stuff */
 135    _mesa_Disable(GL_POLYGON_STIPPLE);
 136
 137    old_active_texture = ctx->Texture.CurrentUnit;
 138    _mesa_ActiveTextureARB(GL_TEXTURE0_ARB);
 139    _mesa_Enable(GL_TEXTURE_2D);
 140    _mesa_GenTextures(1, &texname);
 141    _mesa_BindTexture(GL_TEXTURE_2D, texname);
 142    _mesa_TexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
 143    _mesa_TexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
 144    _mesa_TexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
 145    if (type == GL_ALPHA)
 146       internalFormat = GL_ALPHA;
 147    else
 148       internalFormat = GL_RGBA;
 149    _mesa_TexImage2D(GL_TEXTURE_2D, 0, internalFormat, width, height, 0, format,
 150                     type, pixels);
 151
 152    intel_meta_set_passthrough_transform(intel);
 153
 154    /* convert rasterpos Z from [0,1] to NDC coord in [-1,1] */
 155    z = -1.0 + 2.0 * ctx->Current.RasterPos[2];
 156
 157    /* Create the vertex buffer based on the current raster pos.  The x and y
 158     * we're handed are ctx->Current.RasterPos[0,1] rounded to integers.
 159     * We also apply the depth.  However, the W component is already multiplied
 160     * into ctx->Current.RasterPos[0,1,2] and we can ignore it at this point.
 161     */
 162    vertices[0][0] = x;
 163    vertices[0][1] = y;
 164    vertices[0][2] = z;
 165    vertices[0][3] = 1.0;
 166    vertices[1][0] = x + width * ctx->Pixel.ZoomX;
 167    vertices[1][1] = y;
 168    vertices[1][2] = z;
 169    vertices[1][3] = 1.0;
 170    vertices[2][0] = x + width * ctx->Pixel.ZoomX;
 171    vertices[2][1] = y + height * ctx->Pixel.ZoomY;
 172    vertices[2][2] = z;
 173    vertices[2][3] = 1.0;
 174    vertices[3][0] = x;
 175    vertices[3][1] = y + height * ctx->Pixel.ZoomY;
 176    vertices[3][2] = z;
 177    vertices[3][3] = 1.0;
 178
 179    _mesa_VertexPointer(4, GL_FLOAT, 4 * sizeof(GLfloat), &vertices);
 180    _mesa_Enable(GL_VERTEX_ARRAY);
 181    intel_meta_set_default_texrect(intel);
 182
 183    CALL_DrawArrays(ctx->Exec, (GL_TRIANGLE_FAN, 0, 4));
 184
 185    intel_meta_restore_texcoords(intel);
 186    intel_meta_restore_transform(intel);
 187
 188    _mesa_ActiveTextureARB(GL_TEXTURE0_ARB + old_active_texture);
 189    _mesa_PopClientAttrib();
 190    _mesa_PopAttrib();
 191
 192    _mesa_DeleteTextures(1, &texname);
 193
 194    return GL_TRUE;
 195 }
 196
 197 static GLboolean
 198 intel_stencil_drawpixels(GLcontext * ctx,
 199                          GLint x, GLint y,
 200                          GLsizei width, GLsizei height,
 201                          GLenum format,
 202                          GLenum type,
 203                          const struct gl_pixelstore_attrib *unpack,
 204                          const GLvoid *pixels)
 205 {
 206    struct intel_context *intel = intel_context(ctx);
 207    GLuint texname, rb_name, fb_name, old_fb_name;
 208    GLfloat vertices[4][2];
 209    struct intel_renderbuffer *irb;
 210    struct intel_renderbuffer *depth_irb;
 211    struct gl_renderbuffer *rb;
 212    struct gl_pixelstore_attrib old_unpack;
 213    GLstencil *stencil_pixels;
 214    int row;
 215    GLint old_active_texture;
 216
 217    if (format != GL_STENCIL_INDEX)
 218       return GL_FALSE;
 219
 220    /* If there's nothing to write, we're done. */
 221    if (ctx->Stencil.WriteMask[0] == 0)
 222       return GL_TRUE;
 223
 224    /* Can't do a per-bit writemask while treating stencil as rgba data. */
 225    if ((ctx->Stencil.WriteMask[0] & 0xff) != 0xff) {
 226       if (INTEL_DEBUG & DEBUG_FALLBACKS)
 227          fprintf(stderr, "glDrawPixels(STENCIL_INDEX) fallback: "
 228                  "stencil mask enabled\n");
 229       return GL_FALSE;
 230    }
 231
 232    /* We don't support stencil testing/ops here */
 233    if (ctx->Stencil._Enabled)
 234       return GL_FALSE;
 235
 236    /* We use FBOs for our wrapping of the depthbuffer into a color
 237     * destination.
 238     */
 239    if (!ctx->Extensions.EXT_framebuffer_object)
 240       return GL_FALSE;
 241
 242    /* We're going to mess with texturing with no regard to existing texture
 243     * state, so if there is some set up we have to bail.
 244     */
 245    if (ctx->Texture._EnabledUnits != 0) {
 246       if (INTEL_DEBUG & DEBUG_FALLBACKS)
 247          fprintf(stderr, "glDrawPixels(STENCIL_INDEX) fallback: "
 248                  "texturing enabled\n");
 249       return GL_FALSE;
 250    }
 251
 252    /* Can't do textured DrawPixels with a fragment program, unless we were
 253     * to generate a new program that sampled our texture and put the results
 254     * in the fragment color before the user's program started.
 255     */
 256    if (ctx->FragmentProgram.Enabled) {
 257       if (INTEL_DEBUG & DEBUG_FALLBACKS)
 258          fprintf(stderr, "glDrawPixels(STENCIL_INDEX) fallback: "
 259                  "fragment program enabled\n");
 260       return GL_FALSE;
 261    }
 262
 263    /* Check that we can load in a texture this big. */
 264    if (width > (1 << (ctx->Const.MaxTextureLevels - 1)) ||
 265        height > (1 << (ctx->Const.MaxTextureLevels - 1))) {
 266       if (INTEL_DEBUG & DEBUG_FALLBACKS)
 267          fprintf(stderr, "glDrawPixels(STENCIL_INDEX) fallback: "
 268                  "bitmap too large (%dx%d)\n",
 269                  width, height);
 270       return GL_FALSE;
 271    }
 272
 273    if (!ctx->Extensions.ARB_texture_non_power_of_two &&
 274        (!is_power_of_two(width) || !is_power_of_two(height))) {
 275       if (INTEL_DEBUG & DEBUG_FALLBACKS)
 276          fprintf(stderr,
 277                  "glDrawPixels(GL_STENCIL_INDEX) fallback: NPOT texture\n");
 278       return GL_FALSE;
 279    }
 280
 281    _mesa_PushAttrib(GL_ENABLE_BIT | GL_TEXTURE_BIT |
 282                     GL_CURRENT_BIT | GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 283    _mesa_PushClientAttrib(GL_CLIENT_VERTEX_ARRAY_BIT);
 284    old_fb_name = ctx->DrawBuffer->Name;
 285    old_active_texture = ctx->Texture.CurrentUnit;
 286
 287    _mesa_Disable(GL_POLYGON_STIPPLE);
 288    _mesa_Disable(GL_DEPTH_TEST);
 289    _mesa_Disable(GL_STENCIL_TEST);
 290
 291    /* Unpack the supplied stencil values into a ubyte buffer. */
 292    assert(sizeof(GLstencil) == sizeof(GLubyte));
 293    stencil_pixels = _mesa_malloc(width * height * sizeof(GLstencil));
 294    for (row = 0; row < height; row++) {
 295       GLvoid *source = _mesa_image_address2d(unpack, pixels,
 296                                              width, height,
 297                                              GL_COLOR_INDEX, type,
 298                                              row, 0);
 299       _mesa_unpack_stencil_span(ctx, width, GL_UNSIGNED_BYTE,
 300                                 stencil_pixels +
 301                                 row * width * sizeof(GLstencil),
 302                                 type, source, unpack, ctx->_ImageTransferState);
 303    }
 304
 305    /* Take the current depth/stencil renderbuffer, and make a new one wrapping
 306     * it which will be treated as GL_RGBA8 so we can render to it as a color
 307     * buffer.
 308     */
 309    depth_irb = intel_get_renderbuffer(ctx->DrawBuffer, BUFFER_DEPTH);
 310    irb = intel_create_renderbuffer(GL_RGBA8);
 311    rb = &irb->Base;
 312    irb->Base.Width = depth_irb->Base.Width;
 313    irb->Base.Height = depth_irb->Base.Height;
 314    intel_renderbuffer_set_region(irb, depth_irb->region);
 315
 316    /* Create a name for our renderbuffer, which lets us use other mesa
 317     * rb functions for convenience.
 318     */
 319    _mesa_GenRenderbuffersEXT(1, &rb_name);
 320    irb->Base.RefCount++;
 321    _mesa_HashInsert(ctx->Shared->RenderBuffers, rb_name, &irb->Base);
 322
 323    /* Bind the new renderbuffer to the color attachment point. */
 324    _mesa_GenFramebuffersEXT(1, &fb_name);
 325    _mesa_BindFramebufferEXT(GL_FRAMEBUFFER_EXT, fb_name);
 326    _mesa_FramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT,
 327                                     GL_COLOR_ATTACHMENT0_EXT,
 328                                     GL_RENDERBUFFER_EXT,
 329                                     rb_name);
 330    /* Choose to render to the color attachment. */
 331    _mesa_DrawBuffer(GL_COLOR_ATTACHMENT0_EXT);
 332
 333    _mesa_DepthMask(GL_FALSE);
 334    _mesa_ColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_TRUE);
 335
 336    _mesa_ActiveTextureARB(GL_TEXTURE0_ARB);
 337    _mesa_Enable(GL_TEXTURE_2D);
 338    _mesa_GenTextures(1, &texname);
 339    _mesa_BindTexture(GL_TEXTURE_2D, texname);
 340    _mesa_TexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
 341    _mesa_TexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
 342    _mesa_TexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
 343    old_unpack = ctx->Unpack;
 344    ctx->Unpack = ctx->DefaultPacking;
 345    _mesa_TexImage2D(GL_TEXTURE_2D, 0, GL_INTENSITY, width, height, 0,
 346                     GL_RED, GL_UNSIGNED_BYTE, stencil_pixels);
 347    ctx->Unpack = old_unpack;
 348    _mesa_free(stencil_pixels);
 349
 350    intel_meta_set_passthrough_transform(intel);
 351    vertices[0][0] = x;
 352    vertices[0][1] = y;
 353    vertices[1][0] = x + width * ctx->Pixel.ZoomX;
 354    vertices[1][1] = y;
 355    vertices[2][0] = x + width * ctx->Pixel.ZoomX;
 356    vertices[2][1] = y + height * ctx->Pixel.ZoomY;
 357    vertices[3][0] = x;
 358    vertices[3][1] = y + height * ctx->Pixel.ZoomY;
 359
 360    _mesa_VertexPointer(2, GL_FLOAT, 2 * sizeof(GLfloat), &vertices);
 361    _mesa_Enable(GL_VERTEX_ARRAY);
 362    intel_meta_set_default_texrect(intel);
 363
 364    CALL_DrawArrays(ctx->Exec, (GL_TRIANGLE_FAN, 0, 4));
 365
 366    intel_meta_restore_texcoords(intel);
 367    intel_meta_restore_transform(intel);
 368
 369    _mesa_ActiveTextureARB(GL_TEXTURE0_ARB + old_active_texture);
 370    _mesa_BindFramebufferEXT(GL_FRAMEBUFFER_EXT, old_fb_name);
 371
 372    _mesa_PopClientAttrib();
 373    _mesa_PopAttrib();
 374
 375    _mesa_DeleteTextures(1, &texname);
 376    _mesa_DeleteFramebuffersEXT(1, &fb_name);
 377    _mesa_DeleteRenderbuffersEXT(1, &rb_name);
 378
 379    return GL_TRUE;
 380 }
 381
 382 void
 383 intelDrawPixels(GLcontext * ctx,
 384                 GLint x, GLint y,
 385                 GLsizei width, GLsizei height,
 386                 GLenum format,
 387                 GLenum type,
 388                 const struct gl_pixelstore_attrib *unpack,
 389                 const GLvoid * pixels)
 390 {
 391    if (intel_texture_drawpixels(ctx, x, y, width, height, format, type,
 392                                 unpack, pixels))
 393       return;
 394
 395    if (intel_stencil_drawpixels(ctx, x, y, width, height, format, type,
 396                                 unpack, pixels))
 397       return;
 398
 399    if (INTEL_DEBUG & DEBUG_PIXEL)
 400       _mesa_printf("%s: fallback to swrast\n", __FUNCTION__);
 401
 402    _swrast_DrawPixels(ctx, x, y, width, height, format, type,
 403                       unpack, pixels);
 404 }