src/mesa/state_tracker/st_cb_fbo.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2007 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 portions
  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
  29 /**
  30  * Framebuffer/renderbuffer functions.
  31  *
  32  * \author Brian Paul
  33  */
  34
  35
  36 #include "main/imports.h"
  37 #include "main/context.h"
  38 #include "main/fbobject.h"
  39 #include "main/framebuffer.h"
  40 #include "main/renderbuffer.h"
  41
  42 #include "pipe/p_context.h"
  43 #include "pipe/p_defines.h"
  44 #include "pipe/p_inlines.h"
  45 #include "pipe/p_winsys.h"
  46 #include "st_context.h"
  47 #include "st_cb_fbo.h"
  48 #include "st_cb_texture.h"
  49 #include "st_format.h"
  50 #include "st_public.h"
  51
  52
  53
  54 /**
  55  * Compute the renderbuffer's Red/Green/EtcBit fields from the pipe format.
  56  */
  57 static int
  58 init_renderbuffer_bits(struct st_renderbuffer *strb,
  59                        enum pipe_format pipeFormat)
  60 {
  61    struct pipe_format_info info;
  62
  63    if (!st_get_format_info( pipeFormat, &info )) {
  64       assert( 0 );
  65    }
  66
  67    strb->Base._ActualFormat = info.base_format;
  68    strb->Base.RedBits = info.red_bits;
  69    strb->Base.GreenBits = info.green_bits;
  70    strb->Base.BlueBits = info.blue_bits;
  71    strb->Base.AlphaBits = info.alpha_bits;
  72    strb->Base.DepthBits = info.depth_bits;
  73    strb->Base.StencilBits = info.stencil_bits;
  74    strb->Base.DataType = st_format_datatype(pipeFormat);
  75
  76    return info.size;
  77 }
  78
  79
  80 /**
  81  * gl_renderbuffer::AllocStorage()
  82  */
  83 static GLboolean
  84 st_renderbuffer_alloc_storage(GLcontext * ctx, struct gl_renderbuffer *rb,
  85                               GLenum internalFormat,
  86                               GLuint width, GLuint height)
  87 {
  88    struct pipe_context *pipe = ctx->st->pipe;
  89    struct st_renderbuffer *strb = st_renderbuffer(rb);
  90    uint type = strb->screenSurface ? PIPE_SCREEN_SURFACE : PIPE_SURFACE;
  91    const enum pipe_format pipeFormat
  92       = st_choose_pipe_format(pipe, internalFormat, GL_NONE, GL_NONE, type);
  93    GLbitfield flags = 0x0; /* XXX needed? */
  94
  95    if (!strb->surface) {
  96       strb->surface = pipe->winsys->surface_alloc(pipe->winsys);
  97       assert(strb->surface);
  98       if (!strb->surface)
  99          return GL_FALSE;
 100    }
 101
 102    /* loop here since mapping is refcounted */
 103    while (strb->surface->map)
 104       pipe_surface_unmap(strb->surface);
 105    if (strb->surface->buffer)
 106       pipe->winsys->buffer_reference(pipe->winsys, &strb->surface->buffer,
 107                                      NULL);
 108
 109    pipe->winsys->surface_alloc_storage(pipe->winsys,
 110                                        strb->surface,
 111                                        width,
 112                                        height,
 113                                        pipeFormat,
 114                                        flags);
 115    if (!strb->surface->buffer)
 116       return GL_FALSE; /* out of memory, try s/w buffer? */
 117
 118    ASSERT(strb->surface->buffer);
 119    ASSERT(strb->surface->format);
 120    ASSERT(strb->surface->cpp);
 121    ASSERT(strb->surface->width == width);
 122    ASSERT(strb->surface->height == height);
 123    ASSERT(strb->surface->pitch);
 124
 125    strb->Base.Width  = width;
 126    strb->Base.Height = height;
 127
 128    return GL_TRUE;
 129 }
 130
 131
 132 /**
 133  * gl_renderbuffer::Delete()
 134  */
 135 static void
 136 st_renderbuffer_delete(struct gl_renderbuffer *rb)
 137 {
 138    struct st_renderbuffer *strb = st_renderbuffer(rb);
 139    ASSERT(strb);
 140    if (strb->surface) {
 141       struct pipe_winsys *ws = strb->surface->winsys;
 142       ws->surface_release(ws, &strb->surface);
 143    }
 144    free(strb);
 145 }
 146
 147
 148 /**
 149  * gl_renderbuffer::GetPointer()
 150  */
 151 static void *
 152 null_get_pointer(GLcontext * ctx, struct gl_renderbuffer *rb,
 153                  GLint x, GLint y)
 154 {
 155    /* By returning NULL we force all software rendering to go through
 156     * the span routines.
 157     */
 158 #if 0
 159    assert(0);  /* Should never get called with softpipe */
 160 #endif
 161    return NULL;
 162 }
 163
 164
 165 /**
 166  * Called via ctx->Driver.NewFramebuffer()
 167  */
 168 static struct gl_framebuffer *
 169 st_new_framebuffer(GLcontext *ctx, GLuint name)
 170 {
 171    /* XXX not sure we need to subclass gl_framebuffer for pipe */
 172    return _mesa_new_framebuffer(ctx, name);
 173 }
 174
 175
 176 /**
 177  * Called via ctx->Driver.NewRenderbuffer()
 178  */
 179 static struct gl_renderbuffer *
 180 st_new_renderbuffer(GLcontext *ctx, GLuint name)
 181 {
 182    struct st_renderbuffer *strb = CALLOC_STRUCT(st_renderbuffer);
 183    if (strb) {
 184       _mesa_init_renderbuffer(&strb->Base, name);
 185       strb->Base.Delete = st_renderbuffer_delete;
 186       strb->Base.AllocStorage = st_renderbuffer_alloc_storage;
 187       strb->Base.GetPointer = null_get_pointer;
 188       return &strb->Base;
 189    }
 190    return NULL;
 191 }
 192
 193
 194 /**
 195  * Allocate a renderbuffer for a an on-screen window (not a user-created
 196  * renderbuffer).  The window system code determines the internal format.
 197  * \param screenSurface  indicates if the renderbuffer is a front/back color
 198  *                       buffer that'll be displayed/copied to the screen
 199  */
 200 struct gl_renderbuffer *
 201 st_new_renderbuffer_fb(GLenum intFormat, GLboolean screenSurface)
 202 {
 203    struct st_renderbuffer *strb;
 204
 205    strb = CALLOC_STRUCT(st_renderbuffer);
 206    if (!strb) {
 207       _mesa_error(NULL, GL_OUT_OF_MEMORY, "creating renderbuffer");
 208       return NULL;
 209    }
 210
 211    _mesa_init_renderbuffer(&strb->Base, 0);
 212    strb->Base.ClassID = 0x4242; /* just a unique value */
 213    strb->Base.InternalFormat = intFormat;
 214    strb->screenSurface = screenSurface;
 215
 216    switch (intFormat) {
 217    case GL_RGB5:
 218    case GL_RGBA8:
 219    case GL_RGBA16:
 220       strb->Base._BaseFormat = GL_RGBA;
 221       break;
 222    case GL_DEPTH_COMPONENT16:
 223    case GL_DEPTH_COMPONENT32:
 224       strb->Base._BaseFormat = GL_DEPTH_COMPONENT;
 225       break;
 226    case GL_DEPTH24_STENCIL8_EXT:
 227       strb->Base._BaseFormat = GL_DEPTH_STENCIL_EXT;
 228       break;
 229    case GL_STENCIL_INDEX8_EXT:
 230       strb->Base._BaseFormat = GL_STENCIL_INDEX;
 231       break;
 232    default:
 233       _mesa_problem(NULL,
 234                     "Unexpected intFormat in st_new_renderbuffer");
 235       return NULL;
 236    }
 237
 238    /* st-specific methods */
 239    strb->Base.Delete = st_renderbuffer_delete;
 240    strb->Base.AllocStorage = st_renderbuffer_alloc_storage;
 241    strb->Base.GetPointer = null_get_pointer;
 242
 243    /* surface is allocated in st_renderbuffer_alloc_storage() */
 244    strb->surface = NULL;
 245
 246    return &strb->Base;
 247 }
 248
 249
 250
 251 /**
 252  * Called via ctx->Driver.BindFramebufferEXT().
 253  */
 254 static void
 255 st_bind_framebuffer(GLcontext *ctx, GLenum target,
 256                     struct gl_framebuffer *fb, struct gl_framebuffer *fbread)
 257 {
 258
 259 }
 260
 261 /**
 262  * Called by ctx->Driver.FramebufferRenderbuffer
 263  */
 264 static void
 265 st_framebuffer_renderbuffer(GLcontext *ctx,
 266                             struct gl_framebuffer *fb,
 267                             GLenum attachment,
 268                             struct gl_renderbuffer *rb)
 269 {
 270    /* XXX no need for derivation? */
 271    _mesa_framebuffer_renderbuffer(ctx, fb, attachment, rb);
 272 }
 273
 274
 275 /**
 276  * Called by ctx->Driver.RenderTexture
 277  */
 278 static void
 279 st_render_texture(GLcontext *ctx,
 280                   struct gl_framebuffer *fb,
 281                   struct gl_renderbuffer_attachment *att)
 282 {
 283    struct st_context *st = ctx->st;
 284    struct st_renderbuffer *strb;
 285    struct gl_renderbuffer *rb;
 286    struct pipe_context *pipe = st->pipe;
 287    struct pipe_texture *pt;
 288
 289    assert(!att->Renderbuffer);
 290
 291    /* create new renderbuffer which wraps the texture image */
 292    rb = st_new_renderbuffer(ctx, 0);
 293    if (!rb) {
 294       _mesa_error(ctx, GL_OUT_OF_MEMORY, "glFramebufferTexture()");
 295       return;
 296    }
 297
 298    _mesa_reference_renderbuffer(&att->Renderbuffer, rb);
 299    assert(rb->RefCount == 1);
 300    rb->AllocStorage = NULL; /* should not get called */
 301    strb = st_renderbuffer(rb);
 302
 303    /* get the texture for the texture object */
 304    pt = st_get_texobj_texture(att->Texture);
 305    assert(pt);
 306    assert(pt->width[att->TextureLevel]);
 307
 308    rb->Width = pt->width[att->TextureLevel];
 309    rb->Height = pt->height[att->TextureLevel];
 310
 311    /* the renderbuffer's surface is inside the texture */
 312    strb->surface = pipe->get_tex_surface(pipe, pt,
 313                                          att->CubeMapFace,
 314                                          att->TextureLevel,
 315                                          att->Zoffset);
 316    assert(strb->surface);
 317
 318    init_renderbuffer_bits(strb, pt->format);
 319
 320    /*
 321    printf("RENDER TO TEXTURE obj=%p pt=%p surf=%p  %d x %d\n",
 322           att->Texture, pt, strb->surface, rb->Width, rb->Height);
 323    */
 324
 325    /* Invalidate buffer state so that the pipe's framebuffer state
 326     * gets updated.
 327     * That's where the new renderbuffer (which we just created) gets
 328     * passed to the pipe as a (color/depth) render target.
 329     */
 330    st_invalidate_state(ctx, _NEW_BUFFERS);
 331 }
 332
 333
 334 /**
 335  * Called via ctx->Driver.FinishRenderTexture.
 336  */
 337 static void
 338 st_finish_render_texture(GLcontext *ctx,
 339                          struct gl_renderbuffer_attachment *att)
 340 {
 341    struct st_renderbuffer *strb = st_renderbuffer(att->Renderbuffer);
 342
 343    assert(strb);
 344
 345    ctx->st->pipe->flush(ctx->st->pipe, 0x0);
 346
 347    /*
 348    printf("FINISH RENDER TO TEXTURE surf=%p\n", strb->surface);
 349    */
 350
 351    pipe_surface_reference(&strb->surface, NULL);
 352
 353    _mesa_reference_renderbuffer(&att->Renderbuffer, NULL);
 354
 355    /* restore previous framebuffer state */
 356    st_invalidate_state(ctx, _NEW_BUFFERS);
 357 }
 358
 359
 360
 361 void st_init_fbo_functions(struct dd_function_table *functions)
 362 {
 363    functions->NewFramebuffer = st_new_framebuffer;
 364    functions->NewRenderbuffer = st_new_renderbuffer;
 365    functions->BindFramebuffer = st_bind_framebuffer;
 366    functions->FramebufferRenderbuffer = st_framebuffer_renderbuffer;
 367    functions->RenderTexture = st_render_texture;
 368    functions->FinishRenderTexture = st_finish_render_texture;
 369    /* no longer needed by core Mesa, drivers handle resizes...
 370    functions->ResizeBuffers = st_resize_buffers;
 371    */
 372 }