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