st_cb_fbo.c revision a73ae3d5eb8419feab5aea26573aa41b72f941eb 
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#include "st_texture.h"
52
53
54
55/**
56 * Compute the renderbuffer's Red/Green/EtcBit fields from the pipe format.
57 */
58static int
59init_renderbuffer_bits(struct st_renderbuffer *strb,
60                       enum pipe_format pipeFormat)
61{
62   struct pipe_format_info info;
63
64   if (!st_get_format_info( pipeFormat, &info )) {
65      assert( 0 );
66   }
67
68   strb->Base._ActualFormat = info.base_format;
69   strb->Base.RedBits = info.red_bits;
70   strb->Base.GreenBits = info.green_bits;
71   strb->Base.BlueBits = info.blue_bits;
72   strb->Base.AlphaBits = info.alpha_bits;
73   strb->Base.DepthBits = info.depth_bits;
74   strb->Base.StencilBits = info.stencil_bits;
75   strb->Base.DataType = st_format_datatype(pipeFormat);
76
77   return info.size;
78}
79
80
81/**
82 * gl_renderbuffer::AllocStorage()
83 * This is called to allocate the original drawing surface, and
84 * during window resize.
85 */
86static GLboolean
87st_renderbuffer_alloc_storage(GLcontext * ctx, struct gl_renderbuffer *rb,
88                              GLenum internalFormat,
89                              GLuint width, GLuint height)
90{
91   struct pipe_context *pipe = ctx->st->pipe;
92   struct st_renderbuffer *strb = st_renderbuffer(rb);
93   struct pipe_texture template, *texture;
94   unsigned surface_usage;
95
96   /* Free the old surface (and texture if we hold the last
97    * reference):
98    */
99   pipe_surface_reference( &strb->surface, NULL );
100
101   memset(&template, 0, sizeof(template));
102
103   if (strb->format != PIPE_FORMAT_NONE) {
104      template.format = strb->format;
105   }
106   else {
107      template.format = st_choose_renderbuffer_format(pipe, internalFormat);
108   }
109
110   strb->Base.Width  = width;
111   strb->Base.Height = height;
112   init_renderbuffer_bits(strb, template.format);
113
114   template.compressed = 0;
115   template.cpp = pf_get_size(template.format);
116   template.width[0] = width;
117   template.height[0] = height;
118   template.depth[0] = 1;
119   template.last_level = 0;
120   template.tex_usage = (PIPE_TEXTURE_USAGE_DISPLAY_TARGET |
121                         PIPE_TEXTURE_USAGE_RENDER_TARGET);
122
123   /* Probably need dedicated flags for surface usage too:
124    */
125   surface_usage = (PIPE_BUFFER_USAGE_GPU_READ |
126                    PIPE_BUFFER_USAGE_GPU_WRITE |
127                    PIPE_BUFFER_USAGE_CPU_READ |
128                    PIPE_BUFFER_USAGE_CPU_WRITE);
129
130   texture = pipe->screen->texture_create( pipe->screen,
131                                           &template );
132
133   /* Special path for accum buffers.
134    *
135    * Try a different surface format.  Since accum buffers are s/w
136    * only for now, the surface pixel format doesn't really matter,
137    * only that the buffer is large enough.
138    */
139   if (!texture && template.format == DEFAULT_ACCUM_PIPE_FORMAT)
140   {
141      /* Actually, just setting this usage value should be sufficient
142       * to tell the driver to go ahead and allocate the buffer, even
143       * if HW doesn't support the format.
144       */
145      template.tex_usage = 0;
146      surface_usage = (PIPE_BUFFER_USAGE_CPU_READ |
147                       PIPE_BUFFER_USAGE_CPU_WRITE);
148
149      texture = pipe->screen->texture_create( pipe->screen,
150                                              &template );
151
152   }
153
154   if (!texture)
155      return FALSE;
156
157   strb->surface = pipe->screen->get_tex_surface( pipe->screen,
158                                                  texture,
159                                                  0, 0, 0,
160                                                  surface_usage );
161
162   pipe_texture_reference( &texture, NULL );
163
164   assert(strb->surface->buffer);
165   assert(strb->surface->format);
166   assert(strb->surface->cpp);
167   assert(strb->surface->width == width);
168   assert(strb->surface->height == height);
169   assert(strb->surface->pitch);
170
171
172   return strb->surface != NULL;
173}
174
175
176/**
177 * gl_renderbuffer::Delete()
178 */
179static void
180st_renderbuffer_delete(struct gl_renderbuffer *rb)
181{
182   struct st_renderbuffer *strb = st_renderbuffer(rb);
183   ASSERT(strb);
184   pipe_surface_reference(&strb->surface, NULL);
185   free(strb);
186}
187
188
189/**
190 * gl_renderbuffer::GetPointer()
191 */
192static void *
193null_get_pointer(GLcontext * ctx, struct gl_renderbuffer *rb,
194                 GLint x, GLint y)
195{
196   /* By returning NULL we force all software rendering to go through
197    * the span routines.
198    */
199#if 0
200   assert(0);  /* Should never get called with softpipe */
201#endif
202   return NULL;
203}
204
205
206/**
207 * Called via ctx->Driver.NewFramebuffer()
208 */
209static struct gl_framebuffer *
210st_new_framebuffer(GLcontext *ctx, GLuint name)
211{
212   /* XXX not sure we need to subclass gl_framebuffer for pipe */
213   return _mesa_new_framebuffer(ctx, name);
214}
215
216
217/**
218 * Called via ctx->Driver.NewRenderbuffer()
219 */
220static struct gl_renderbuffer *
221st_new_renderbuffer(GLcontext *ctx, GLuint name)
222{
223   struct st_renderbuffer *strb = CALLOC_STRUCT(st_renderbuffer);
224   if (strb) {
225      _mesa_init_renderbuffer(&strb->Base, name);
226      strb->Base.Delete = st_renderbuffer_delete;
227      strb->Base.AllocStorage = st_renderbuffer_alloc_storage;
228      strb->Base.GetPointer = null_get_pointer;
229      strb->format = PIPE_FORMAT_NONE;
230      return &strb->Base;
231   }
232   return NULL;
233}
234
235
236/**
237 * Allocate a renderbuffer for a an on-screen window (not a user-created
238 * renderbuffer).  The window system code determines the format.
239 */
240struct gl_renderbuffer *
241st_new_renderbuffer_fb(enum pipe_format format)
242{
243   struct st_renderbuffer *strb;
244
245   strb = CALLOC_STRUCT(st_renderbuffer);
246   if (!strb) {
247      _mesa_error(NULL, GL_OUT_OF_MEMORY, "creating renderbuffer");
248      return NULL;
249   }
250
251   _mesa_init_renderbuffer(&strb->Base, 0);
252   strb->Base.ClassID = 0x4242; /* just a unique value */
253   strb->format = format;
254
255   switch (format) {
256   case PIPE_FORMAT_A8R8G8B8_UNORM:
257   case PIPE_FORMAT_B8G8R8A8_UNORM:
258   case PIPE_FORMAT_X8R8G8B8_UNORM:
259   case PIPE_FORMAT_B8G8R8X8_UNORM:
260   case PIPE_FORMAT_A1R5G5B5_UNORM:
261   case PIPE_FORMAT_A4R4G4B4_UNORM:
262   case PIPE_FORMAT_R5G6B5_UNORM:
263      strb->Base.InternalFormat = GL_RGBA;
264      strb->Base._BaseFormat = GL_RGBA;
265      break;
266   case PIPE_FORMAT_Z16_UNORM:
267      strb->Base.InternalFormat = GL_DEPTH_COMPONENT16;
268      strb->Base._BaseFormat = GL_DEPTH_COMPONENT;
269      break;
270   case PIPE_FORMAT_Z32_UNORM:
271      strb->Base.InternalFormat = GL_DEPTH_COMPONENT32;
272      strb->Base._BaseFormat = GL_DEPTH_COMPONENT;
273      break;
274   case PIPE_FORMAT_S8Z24_UNORM:
275   case PIPE_FORMAT_Z24S8_UNORM:
276   case PIPE_FORMAT_X8Z24_UNORM:
277   case PIPE_FORMAT_Z24X8_UNORM:
278      strb->Base.InternalFormat = GL_DEPTH24_STENCIL8_EXT;
279      strb->Base._BaseFormat = GL_DEPTH_STENCIL_EXT;
280      break;
281   case PIPE_FORMAT_S8_UNORM:
282      strb->Base.InternalFormat = GL_STENCIL_INDEX8_EXT;
283      strb->Base._BaseFormat = GL_STENCIL_INDEX;
284      break;
285   case DEFAULT_ACCUM_PIPE_FORMAT: /*PIPE_FORMAT_R16G16B16A16_SNORM*/
286      strb->Base.InternalFormat = GL_RGBA16;
287      strb->Base._BaseFormat = GL_RGBA;
288      break;
289   default:
290      _mesa_problem(NULL,
291		    "Unexpected format in st_new_renderbuffer_fb");
292      return NULL;
293   }
294
295   /* st-specific methods */
296   strb->Base.Delete = st_renderbuffer_delete;
297   strb->Base.AllocStorage = st_renderbuffer_alloc_storage;
298   strb->Base.GetPointer = null_get_pointer;
299
300   /* surface is allocated in st_renderbuffer_alloc_storage() */
301   strb->surface = NULL;
302
303   return &strb->Base;
304}
305
306
307
308
309/**
310 * Called via ctx->Driver.BindFramebufferEXT().
311 */
312static void
313st_bind_framebuffer(GLcontext *ctx, GLenum target,
314                    struct gl_framebuffer *fb, struct gl_framebuffer *fbread)
315{
316
317}
318
319/**
320 * Called by ctx->Driver.FramebufferRenderbuffer
321 */
322static void
323st_framebuffer_renderbuffer(GLcontext *ctx,
324                            struct gl_framebuffer *fb,
325                            GLenum attachment,
326                            struct gl_renderbuffer *rb)
327{
328   /* XXX no need for derivation? */
329   _mesa_framebuffer_renderbuffer(ctx, fb, attachment, rb);
330}
331
332
333/**
334 * Called by ctx->Driver.RenderTexture
335 */
336static void
337st_render_texture(GLcontext *ctx,
338                  struct gl_framebuffer *fb,
339                  struct gl_renderbuffer_attachment *att)
340{
341   struct st_context *st = ctx->st;
342   struct st_renderbuffer *strb;
343   struct gl_renderbuffer *rb;
344   struct pipe_context *pipe = st->pipe;
345   struct pipe_screen *screen = pipe->screen;
346   struct pipe_texture *pt;
347
348   assert(!att->Renderbuffer);
349
350   /* create new renderbuffer which wraps the texture image */
351   rb = st_new_renderbuffer(ctx, 0);
352   if (!rb) {
353      _mesa_error(ctx, GL_OUT_OF_MEMORY, "glFramebufferTexture()");
354      return;
355   }
356
357   _mesa_reference_renderbuffer(&att->Renderbuffer, rb);
358   assert(rb->RefCount == 1);
359   rb->AllocStorage = NULL; /* should not get called */
360   strb = st_renderbuffer(rb);
361
362   /* get the texture for the texture object */
363   pt = st_get_texobj_texture(att->Texture);
364   assert(pt);
365   assert(pt->width[att->TextureLevel]);
366
367   rb->Width = pt->width[att->TextureLevel];
368   rb->Height = pt->height[att->TextureLevel];
369
370   /* the renderbuffer's surface is inside the texture */
371   strb->surface = screen->get_tex_surface(screen, pt,
372                                           att->CubeMapFace,
373                                           att->TextureLevel,
374                                           att->Zoffset,
375                                           PIPE_BUFFER_USAGE_CPU_READ |
376                                           PIPE_BUFFER_USAGE_CPU_WRITE |
377                                           PIPE_BUFFER_USAGE_GPU_READ |
378                                           PIPE_BUFFER_USAGE_GPU_WRITE);
379   assert(strb->surface);
380   assert(screen->is_format_supported(screen, strb->surface->format, PIPE_TEXTURE));
381   assert(screen->is_format_supported(screen, strb->surface->format, PIPE_SURFACE));
382
383   init_renderbuffer_bits(strb, pt->format);
384
385   /*
386   printf("RENDER TO TEXTURE obj=%p pt=%p surf=%p  %d x %d\n",
387          att->Texture, pt, strb->surface, rb->Width, rb->Height);
388   */
389
390   /* Invalidate buffer state so that the pipe's framebuffer state
391    * gets updated.
392    * That's where the new renderbuffer (which we just created) gets
393    * passed to the pipe as a (color/depth) render target.
394    */
395   st_invalidate_state(ctx, _NEW_BUFFERS);
396}
397
398
399/**
400 * Called via ctx->Driver.FinishRenderTexture.
401 */
402static void
403st_finish_render_texture(GLcontext *ctx,
404                         struct gl_renderbuffer_attachment *att)
405{
406   struct pipe_screen *screen = ctx->st->pipe->screen;
407   struct st_renderbuffer *strb = st_renderbuffer(att->Renderbuffer);
408
409   assert(strb);
410
411   ctx->st->pipe->flush(ctx->st->pipe, PIPE_FLUSH_RENDER_CACHE, NULL);
412
413   screen->tex_surface_release( screen, &strb->surface );
414
415   /*
416   printf("FINISH RENDER TO TEXTURE surf=%p\n", strb->surface);
417   */
418
419   _mesa_reference_renderbuffer(&att->Renderbuffer, NULL);
420
421   /* restore previous framebuffer state */
422   st_invalidate_state(ctx, _NEW_BUFFERS);
423}
424
425
426
427void st_init_fbo_functions(struct dd_function_table *functions)
428{
429   functions->NewFramebuffer = st_new_framebuffer;
430   functions->NewRenderbuffer = st_new_renderbuffer;
431   functions->BindFramebuffer = st_bind_framebuffer;
432   functions->FramebufferRenderbuffer = st_framebuffer_renderbuffer;
433   functions->RenderTexture = st_render_texture;
434   functions->FinishRenderTexture = st_finish_render_texture;
435   /* no longer needed by core Mesa, drivers handle resizes...
436   functions->ResizeBuffers = st_resize_buffers;
437   */
438}
439