st_cb_fbo.c revision 54fc80ab31f89520d3119196bfa9c6332b35fe2f 
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 */
57static int
58init_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 */
83static GLboolean
84st_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   const enum pipe_format pipeFormat
91      = st_choose_pipe_format(pipe, internalFormat, GL_NONE, GL_NONE);
92   GLuint cpp;
93   GLbitfield flags = PIPE_SURFACE_FLAG_RENDER; /* want to render to surface */
94
95   cpp = init_renderbuffer_bits(strb, pipeFormat);
96
97   if (strb->surface && strb->surface->format != pipeFormat) {
98      /* need to change surface types, free this surface */
99      pipe_surface_reference(&strb->surface, NULL);
100      assert(strb->surface == NULL);
101   }
102
103   if (!strb->surface) {
104      strb->surface = pipe->winsys->surface_alloc(pipe->winsys, pipeFormat);
105      assert(strb->surface);
106      if (!strb->surface)
107         return GL_FALSE;
108      strb->surface->cpp = cpp;
109   }
110
111   strb->surface->pitch = pipe->winsys->surface_pitch(pipe->winsys, cpp,
112                                                      width, flags);
113
114   /* loop here since mapping is refcounted */
115   while (strb->surface->map)
116      pipe_surface_unmap(strb->surface);
117   if (strb->surface->buffer)
118      pipe->winsys->buffer_reference(pipe->winsys, &strb->surface->buffer,
119				     NULL);
120
121   strb->surface->buffer = pipe->winsys->buffer_create(pipe->winsys, flags);
122   if (!strb->surface->buffer)
123      return GL_FALSE; /* out of memory, try s/w buffer? */
124
125   pipe->winsys->buffer_data(pipe->winsys, strb->surface->buffer,
126			     strb->surface->pitch * cpp * height, NULL,
127			     PIPE_BUFFER_USAGE_PIXEL);
128
129   ASSERT(strb->surface->buffer);
130   ASSERT(strb->surface->format);
131
132   strb->Base.Width  = strb->surface->width  = width;
133   strb->Base.Height = strb->surface->height = height;
134
135   return GL_TRUE;
136}
137
138
139/**
140 * gl_renderbuffer::Delete()
141 */
142static void
143st_renderbuffer_delete(struct gl_renderbuffer *rb)
144{
145   struct st_renderbuffer *strb = st_renderbuffer(rb);
146   ASSERT(strb);
147   if (strb->surface) {
148      struct pipe_winsys *ws = strb->surface->winsys;
149      ws->surface_release(ws, &strb->surface);
150   }
151   free(strb);
152}
153
154
155/**
156 * gl_renderbuffer::GetPointer()
157 */
158static void *
159null_get_pointer(GLcontext * ctx, struct gl_renderbuffer *rb,
160                 GLint x, GLint y)
161{
162   /* By returning NULL we force all software rendering to go through
163    * the span routines.
164    */
165#if 0
166   assert(0);  /* Should never get called with softpipe */
167#endif
168   return NULL;
169}
170
171
172/**
173 * Called via ctx->Driver.NewFramebuffer()
174 */
175static struct gl_framebuffer *
176st_new_framebuffer(GLcontext *ctx, GLuint name)
177{
178   /* XXX not sure we need to subclass gl_framebuffer for pipe */
179   return _mesa_new_framebuffer(ctx, name);
180}
181
182
183/**
184 * Called via ctx->Driver.NewRenderbuffer()
185 */
186static struct gl_renderbuffer *
187st_new_renderbuffer(GLcontext *ctx, GLuint name)
188{
189   struct st_renderbuffer *strb = CALLOC_STRUCT(st_renderbuffer);
190   if (strb) {
191      _mesa_init_renderbuffer(&strb->Base, name);
192      strb->Base.Delete = st_renderbuffer_delete;
193      strb->Base.AllocStorage = st_renderbuffer_alloc_storage;
194      strb->Base.GetPointer = null_get_pointer;
195      return &strb->Base;
196   }
197   return NULL;
198}
199
200
201/**
202 * Allocate a renderbuffer for a an on-screen window (not a user-created
203 * renderbuffer).  The window system code determines the internal format.
204 */
205struct gl_renderbuffer *
206st_new_renderbuffer_fb(GLenum intFormat)
207{
208   struct st_renderbuffer *strb;
209
210   strb = CALLOC_STRUCT(st_renderbuffer);
211   if (!strb) {
212      _mesa_error(NULL, GL_OUT_OF_MEMORY, "creating renderbuffer");
213      return NULL;
214   }
215
216   _mesa_init_renderbuffer(&strb->Base, 0);
217   strb->Base.ClassID = 0x4242; /* just a unique value */
218   strb->Base.InternalFormat = intFormat;
219
220   switch (intFormat) {
221   case GL_RGB5:
222   case GL_RGBA8:
223   case GL_RGBA16:
224      strb->Base._BaseFormat = GL_RGBA;
225      break;
226   case GL_DEPTH_COMPONENT16:
227   case GL_DEPTH_COMPONENT32:
228      strb->Base._BaseFormat = GL_DEPTH_COMPONENT;
229      break;
230   case GL_DEPTH24_STENCIL8_EXT:
231      strb->Base._BaseFormat = GL_DEPTH_STENCIL_EXT;
232      break;
233   case GL_STENCIL_INDEX8_EXT:
234      strb->Base._BaseFormat = GL_STENCIL_INDEX;
235      break;
236   default:
237      _mesa_problem(NULL,
238		    "Unexpected intFormat in st_new_renderbuffer");
239      return NULL;
240   }
241
242   /* st-specific methods */
243   strb->Base.Delete = st_renderbuffer_delete;
244   strb->Base.AllocStorage = st_renderbuffer_alloc_storage;
245   strb->Base.GetPointer = null_get_pointer;
246
247   /* surface is allocated in st_renderbuffer_alloc_storage() */
248   strb->surface = NULL;
249
250   return &strb->Base;
251}
252
253
254
255/**
256 * Called via ctx->Driver.BindFramebufferEXT().
257 */
258static void
259st_bind_framebuffer(GLcontext *ctx, GLenum target,
260                    struct gl_framebuffer *fb, struct gl_framebuffer *fbread)
261{
262
263}
264
265/**
266 * Called by ctx->Driver.FramebufferRenderbuffer
267 */
268static void
269st_framebuffer_renderbuffer(GLcontext *ctx,
270                            struct gl_framebuffer *fb,
271                            GLenum attachment,
272                            struct gl_renderbuffer *rb)
273{
274   /* XXX no need for derivation? */
275   _mesa_framebuffer_renderbuffer(ctx, fb, attachment, rb);
276}
277
278
279/**
280 * Called by ctx->Driver.RenderTexture
281 */
282static void
283st_render_texture(GLcontext *ctx,
284                  struct gl_framebuffer *fb,
285                  struct gl_renderbuffer_attachment *att)
286{
287   struct st_context *st = ctx->st;
288   struct st_renderbuffer *strb;
289   struct gl_renderbuffer *rb;
290   struct pipe_context *pipe = st->pipe;
291   struct pipe_texture *pt;
292
293   assert(!att->Renderbuffer);
294
295   /* create new renderbuffer which wraps the texture image */
296   rb = st_new_renderbuffer(ctx, 0);
297   if (!rb) {
298      _mesa_error(ctx, GL_OUT_OF_MEMORY, "glFramebufferTexture()");
299      return;
300   }
301
302   _mesa_reference_renderbuffer(&att->Renderbuffer, rb);
303   assert(rb->RefCount == 1);
304   rb->AllocStorage = NULL; /* should not get called */
305   strb = st_renderbuffer(rb);
306
307   /* get the texture for the texture object */
308   pt = st_get_texobj_texture(att->Texture);
309   assert(pt);
310   assert(pt->width[att->TextureLevel]);
311
312   rb->Width = pt->width[att->TextureLevel];
313   rb->Height = pt->height[att->TextureLevel];
314
315   /* the renderbuffer's surface is inside the texture */
316   strb->surface = pipe->get_tex_surface(pipe, pt,
317                                         att->CubeMapFace,
318                                         att->TextureLevel,
319                                         att->Zoffset);
320   assert(strb->surface);
321
322   init_renderbuffer_bits(strb, pt->format);
323
324   /*
325   printf("RENDER TO TEXTURE obj=%p pt=%p surf=%p  %d x %d\n",
326          att->Texture, pt, strb->surface, rb->Width, rb->Height);
327   */
328
329   /* Invalidate buffer state so that the pipe's framebuffer state
330    * gets updated.
331    * That's where the new renderbuffer (which we just created) gets
332    * passed to the pipe as a (color/depth) render target.
333    */
334   st_invalidate_state(ctx, _NEW_BUFFERS);
335}
336
337
338/**
339 * Called via ctx->Driver.FinishRenderTexture.
340 */
341static void
342st_finish_render_texture(GLcontext *ctx,
343                         struct gl_renderbuffer_attachment *att)
344{
345   struct st_renderbuffer *strb = st_renderbuffer(att->Renderbuffer);
346
347   assert(strb);
348
349   ctx->st->pipe->flush(ctx->st->pipe, 0x0);
350
351   /*
352   printf("FINISH RENDER TO TEXTURE surf=%p\n", strb->surface);
353   */
354
355   pipe_surface_reference(&strb->surface, NULL);
356
357   _mesa_reference_renderbuffer(&att->Renderbuffer, NULL);
358
359   /* restore previous framebuffer state */
360   st_invalidate_state(ctx, _NEW_BUFFERS);
361}
362
363
364
365void st_init_fbo_functions(struct dd_function_table *functions)
366{
367   functions->NewFramebuffer = st_new_framebuffer;
368   functions->NewRenderbuffer = st_new_renderbuffer;
369   functions->BindFramebuffer = st_bind_framebuffer;
370   functions->FramebufferRenderbuffer = st_framebuffer_renderbuffer;
371   functions->RenderTexture = st_render_texture;
372   functions->FinishRenderTexture = st_finish_render_texture;
373   /* no longer needed by core Mesa, drivers handle resizes...
374   functions->ResizeBuffers = st_resize_buffers;
375   */
376}
377