summaryrefslogtreecommitdiff
path: root/src/mesa/state_tracker/st_cb_fbo.c
blob: 430ac715e54d72b308e18df8123abef45cb5f5f3 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
/**************************************************************************
 * 
 * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
 * All Rights Reserved.
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sub license, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 * 
 * The above copyright notice and this permission notice (including the
 * next paragraph) shall be included in all copies or substantial portions
 * of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 * 
 **************************************************************************/


/**
 * Framebuffer/renderbuffer functions.
 *
 * \author Brian Paul
 */


#include "main/imports.h"
#include "main/context.h"
#include "main/fbobject.h"
#include "main/framebuffer.h"
#include "main/renderbuffer.h"

#include "pipe/p_context.h"
#include "pipe/p_defines.h"
#include "st_context.h"
#include "st_cb_fbo.h"
#include "st_cb_texture.h"
#include "st_format.h"
#include "st_public.h"



/**
 * gl_renderbuffer::AllocStorage()
 */
static GLboolean
st_renderbuffer_alloc_storage(GLcontext * ctx, struct gl_renderbuffer *rb,
                              GLenum internalFormat,
                              GLuint width, GLuint height)
{
   struct pipe_context *pipe = ctx->st->pipe;
   struct st_renderbuffer *strb = st_renderbuffer(rb);
   const GLuint pipeFormat
      = st_choose_pipe_format(pipe, internalFormat, GL_NONE, GL_NONE);
   const struct pipe_format_info *info = st_get_format_info(pipeFormat);
   GLuint cpp;
   GLbitfield flags = PIPE_SURFACE_FLAG_RENDER; /* want to render to surface */

   assert(info);
   if (!info)
      return GL_FALSE;

   switch (pipeFormat) {
   case PIPE_FORMAT_S8_Z24:
      strb->Base.DataType = GL_UNSIGNED_INT;
      break;
   default:
      strb->Base.DataType = GL_UNSIGNED_BYTE; /* XXX fix */
   }

   strb->Base._ActualFormat = info->base_format;
   strb->Base.RedBits = info->red_bits;
   strb->Base.GreenBits = info->green_bits;
   strb->Base.BlueBits = info->blue_bits;
   strb->Base.AlphaBits = info->alpha_bits;
   strb->Base.DepthBits = info->depth_bits;
   strb->Base.StencilBits = info->stencil_bits;

   cpp = info->size;

   if (!strb->surface) {
      strb->surface = pipe->surface_alloc(pipe, pipeFormat);
      assert(strb->surface);
      if (!strb->surface)
         return GL_FALSE;
   }

   /* free old region */
   if (strb->surface->region) {
      pipe->region_release(pipe, &strb->surface->region);
   }

   strb->surface->region = pipe->region_alloc(pipe, cpp, width, height, flags);
   if (!strb->surface->region)
      return GL_FALSE; /* out of memory, try s/w buffer? */

   ASSERT(strb->surface->region->buffer);
   ASSERT(strb->surface->format);

   strb->Base.Width  = strb->surface->width  = width;
   strb->Base.Height = strb->surface->height = height;

   return GL_TRUE;
}


/**
 * gl_renderbuffer::Delete()
 */
static void
st_renderbuffer_delete(struct gl_renderbuffer *rb)
{
   struct st_renderbuffer *strb = st_renderbuffer(rb);
   GET_CURRENT_CONTEXT(ctx);
   if (ctx) {
      struct pipe_context *pipe = ctx->st->pipe;
      ASSERT(strb);
      if (strb && strb->surface) {
         if (strb->surface->region) {
            pipe->region_release(pipe, &strb->surface->region);
         }
         free(strb->surface);
      }
   }
   else {
      _mesa_warning(NULL, "st_renderbuffer_delete() called, but no current context");
   }
   free(strb);
}


/**
 * gl_renderbuffer::GetPointer()
 */
static void *
null_get_pointer(GLcontext * ctx, struct gl_renderbuffer *rb,
                 GLint x, GLint y)
{
   /* By returning NULL we force all software rendering to go through
    * the span routines.
    */
#if 0
   assert(0);  /* Should never get called with softpipe */
#endif
   return NULL;
}


/**
 * Called via ctx->Driver.NewFramebuffer()
 */
static struct gl_framebuffer *
st_new_framebuffer(GLcontext *ctx, GLuint name)
{
   /* XXX not sure we need to subclass gl_framebuffer for pipe */
   return _mesa_new_framebuffer(ctx, name);
}


/**
 * Called via ctx->Driver.NewRenderbuffer()
 */
static struct gl_renderbuffer *
st_new_renderbuffer(GLcontext *ctx, GLuint name)
{
   struct st_renderbuffer *strb = CALLOC_STRUCT(st_renderbuffer);
   if (strb) {
      _mesa_init_renderbuffer(&strb->Base, name);
      strb->Base.Delete = st_renderbuffer_delete;
      strb->Base.AllocStorage = st_renderbuffer_alloc_storage;
      strb->Base.GetPointer = null_get_pointer;
      return &strb->Base;
   }
   return NULL;
}


#if 000
struct gl_renderbuffer *
st_new_renderbuffer_fb(struct pipe_region *region, GLuint width, GLuint height)
{
   struct st_renderbuffer *strb = CALLOC_STRUCT(st_renderbuffer);
   if (!strb)
      return;

   _mesa_init_renderbuffer(&strb->Base, name);
   strb->Base.Delete = st_renderbuffer_delete;
   strb->Base.AllocStorage = st_renderbuffer_alloc_storage;
   strb->Base.GetPointer = null_get_pointer;
   strb->Base.Width = width;
   strb->Base.Heigth = height;

   strb->region = region;

   return &strb->Base;
}

#else

struct gl_renderbuffer *
st_new_renderbuffer_fb(GLenum intFormat)
{
   struct st_renderbuffer *strb;

   strb = CALLOC_STRUCT(st_renderbuffer);
   if (!strb) {
      _mesa_error(NULL, GL_OUT_OF_MEMORY, "creating renderbuffer");
      return NULL;
   }

   _mesa_init_renderbuffer(&strb->Base, 0);
   strb->Base.ClassID = 0x42; /* XXX temp */
   strb->Base.InternalFormat = intFormat;

   switch (intFormat) {
   case GL_RGB5:
   case GL_RGBA8:
      strb->Base._BaseFormat = GL_RGBA;
      break;
   case GL_DEPTH_COMPONENT16:
   case GL_DEPTH_COMPONENT32:
      strb->Base._BaseFormat = GL_DEPTH_COMPONENT;
      break;
   case GL_DEPTH24_STENCIL8_EXT:
      strb->Base._BaseFormat = GL_DEPTH_STENCIL_EXT;
      break;
   default:
      _mesa_problem(NULL,
		    "Unexpected intFormat in st_new_renderbuffer");
      return NULL;
   }

   /* st-specific methods */
   strb->Base.Delete = st_renderbuffer_delete;
   strb->Base.AllocStorage = st_renderbuffer_alloc_storage;
   strb->Base.GetPointer = null_get_pointer;

   /* surface is allocate in alloc_renderbuffer_storage() */
   strb->surface = NULL;

   return &strb->Base;
}
#endif



/**
 * Called via ctx->Driver.BindFramebufferEXT().
 */
static void
st_bind_framebuffer(GLcontext *ctx, GLenum target,
                    struct gl_framebuffer *fb, struct gl_framebuffer *fbread)
{

}

/**
 * Called by ctx->Driver.FramebufferRenderbuffer
 */
static void
st_framebuffer_renderbuffer(GLcontext *ctx, 
                            struct gl_framebuffer *fb,
                            GLenum attachment,
                            struct gl_renderbuffer *rb)
{
   /* XXX no need for derivation? */
   _mesa_framebuffer_renderbuffer(ctx, fb, attachment, rb);
}


/**
 * Called by ctx->Driver.RenderTexture
 */
static void
st_render_texture(GLcontext *ctx,
                  struct gl_framebuffer *fb,
                  struct gl_renderbuffer_attachment *att)
{
   struct st_context *st = ctx->st;
   struct st_renderbuffer *strb;
   struct gl_renderbuffer *rb;
   struct pipe_context *pipe = st->pipe;
   struct pipe_mipmap_tree *mt;

   assert(!att->Renderbuffer);

   /* create new renderbuffer which wraps the texture image */
   rb = st_new_renderbuffer(ctx, 0);
   if (!rb) {
      _mesa_error(ctx, GL_OUT_OF_MEMORY, "glFramebufferTexture()");
      return;
   }

   _mesa_reference_renderbuffer(&att->Renderbuffer, rb);
   assert(rb->RefCount == 1);
   rb->AllocStorage = NULL; /* should not get called */
   strb = st_renderbuffer(rb);

   /* get the mipmap tree for the texture */
   mt = st_get_texobj_mipmap_tree(att->Texture);
   assert(mt);
   assert(mt->level[0].width);

   rb->Width = mt->level[0].width;
   rb->Height = mt->level[0].height;

   /* the renderbuffer's surface is inside the mipmap_tree: */
   strb->surface = pipe->get_tex_surface(pipe, mt,
                                         att->CubeMapFace,
                                         att->TextureLevel,
                                         att->Zoffset);
   assert(strb->surface);

   /*
   printf("RENDER TO TEXTURE obj=%p mt=%p surf=%p  %d x %d\n",
          att->Texture, mt, strb->surface, rb->Width, rb->Height);
   */

   /* Invalidate buffer state so that the pipe's framebuffer state
    * gets updated.
    * That's where the new renderbuffer (which we just created) gets
    * passed to the pipe as a (color/depth) render target.
    */
   st_invalidate_state(ctx, _NEW_BUFFERS);
}


/**
 * Called via ctx->Driver.FinishRenderTexture.
 */
static void
st_finish_render_texture(GLcontext *ctx,
                         struct gl_renderbuffer_attachment *att)
{
   struct st_renderbuffer *strb = st_renderbuffer(att->Renderbuffer);

   assert(strb);

   ctx->st->pipe->flush(ctx->st->pipe, 0x0);

   /*
   printf("FINISH RENDER TO TEXTURE surf=%p\n", strb->surface);
   */

   pipe_surface_reference(&strb->surface, NULL);

   _mesa_reference_renderbuffer(&att->Renderbuffer, NULL);

   /* restore previous framebuffer state */
   st_invalidate_state(ctx, _NEW_BUFFERS);
}



void st_init_fbo_functions(struct dd_function_table *functions)
{
   functions->NewFramebuffer = st_new_framebuffer;
   functions->NewRenderbuffer = st_new_renderbuffer;
   functions->BindFramebuffer = st_bind_framebuffer;
   functions->FramebufferRenderbuffer = st_framebuffer_renderbuffer;
   functions->RenderTexture = st_render_texture;
   functions->FinishRenderTexture = st_finish_render_texture;
   /* no longer needed by core Mesa, drivers handle resizes...
   functions->ResizeBuffers = st_resize_buffers;
   */
}