intel_tex.c revision 68da4b50e9b6aa72a9b155f650952620063e1b94 
1#include "swrast/swrast.h"
2#include "main/renderbuffer.h"
3#include "main/texobj.h"
4#include "main/teximage.h"
5#include "main/mipmap.h"
6#include "drivers/common/meta.h"
7#include "intel_context.h"
8#include "intel_mipmap_tree.h"
9#include "intel_tex.h"
10
11#define FILE_DEBUG_FLAG DEBUG_TEXTURE
12
13static struct gl_texture_image *
14intelNewTextureImage(struct gl_context * ctx)
15{
16   DBG("%s\n", __FUNCTION__);
17   (void) ctx;
18   return (struct gl_texture_image *) CALLOC_STRUCT(intel_texture_image);
19}
20
21static void
22intelDeleteTextureImage(struct gl_context * ctx, struct gl_texture_image *img)
23{
24   /* nothing special (yet) for intel_texture_image */
25   _mesa_delete_texture_image(ctx, img);
26}
27
28
29static struct gl_texture_object *
30intelNewTextureObject(struct gl_context * ctx, GLuint name, GLenum target)
31{
32   struct intel_texture_object *obj = CALLOC_STRUCT(intel_texture_object);
33
34   (void) ctx;
35
36   DBG("%s\n", __FUNCTION__);
37   _mesa_initialize_texture_object(&obj->base, name, target);
38
39   return &obj->base;
40}
41
42static void
43intelDeleteTextureObject(struct gl_context *ctx,
44			 struct gl_texture_object *texObj)
45{
46   struct intel_texture_object *intelObj = intel_texture_object(texObj);
47
48   intel_miptree_release(&intelObj->mt);
49   _mesa_delete_texture_object(ctx, texObj);
50}
51
52static GLboolean
53intel_alloc_texture_image_buffer(struct gl_context *ctx,
54				 struct gl_texture_image *image,
55				 gl_format format, GLsizei width,
56				 GLsizei height, GLsizei depth)
57{
58   struct intel_context *intel = intel_context(ctx);
59   struct intel_texture_image *intel_image = intel_texture_image(image);
60   struct gl_texture_object *texobj = image->TexObject;
61   struct intel_texture_object *intel_texobj = intel_texture_object(texobj);
62   GLuint slices;
63
64   /* Because the driver uses AllocTextureImageBuffer() internally, it may end
65    * up mismatched with FreeTextureImageBuffer(), but that is safe to call
66    * multiple times.
67    */
68   ctx->Driver.FreeTextureImageBuffer(ctx, image);
69
70   if (intel->must_use_separate_stencil
71       && image->TexFormat == MESA_FORMAT_S8_Z24) {
72      intel_tex_image_s8z24_create_renderbuffers(intel, intel_image);
73   }
74
75   /* Allocate the swrast_texture_image::ImageOffsets array now */
76   switch (texobj->Target) {
77   case GL_TEXTURE_3D:
78   case GL_TEXTURE_2D_ARRAY:
79      slices = image->Depth;
80      break;
81   case GL_TEXTURE_1D_ARRAY:
82      slices = image->Height;
83      break;
84   default:
85      slices = 1;
86   }
87   assert(!intel_image->base.ImageOffsets);
88   intel_image->base.ImageOffsets = malloc(slices * sizeof(GLuint));
89
90   if (intel_texobj->mt &&
91       intel_miptree_match_image(intel_texobj->mt, image)) {
92      intel_miptree_reference(&intel_image->mt, intel_texobj->mt);
93      DBG("%s: alloc obj %p level %d %dx%dx%d using object's miptree %p\n",
94          __FUNCTION__, texobj, image->Level,
95          width, height, depth, intel_texobj->mt);
96      return true;
97   } else if (image->Border == 0) {
98      intel_image->mt = intel_miptree_create_for_teximage(intel, intel_texobj,
99                                                          intel_image,
100                                                          false);
101
102      /* Even if the object currently has a mipmap tree associated
103       * with it, this one is a more likely candidate to represent the
104       * whole object since our level didn't fit what was there
105       * before, and any lower levels would fit into our miptree.
106       */
107      intel_miptree_reference(&intel_texobj->mt, intel_image->mt);
108
109      if (intel->must_use_separate_stencil
110          && image->TexFormat == MESA_FORMAT_S8_Z24) {
111         intel_tex_image_s8z24_create_renderbuffers(intel, intel_image);
112      }
113
114      DBG("%s: alloc obj %p level %d %dx%dx%d using new miptree %p\n",
115          __FUNCTION__, texobj, image->Level,
116          width, height, depth, intel_image->mt);
117      return true;
118   }
119
120   DBG("%s: alloc obj %p level %d %dx%dx%d using swrast\n",
121       __FUNCTION__, texobj, image->Level, width, height, depth);
122
123   return _swrast_alloc_texture_image_buffer(ctx, image, format,
124					     width, height, depth);
125}
126
127static void
128intel_free_texture_image_buffer(struct gl_context * ctx,
129				struct gl_texture_image *texImage)
130{
131   struct intel_texture_image *intelImage = intel_texture_image(texImage);
132
133   DBG("%s\n", __FUNCTION__);
134
135   intel_miptree_release(&intelImage->mt);
136
137   if (intelImage->base.Buffer) {
138      _mesa_align_free(intelImage->base.Buffer);
139      intelImage->base.Buffer = NULL;
140   }
141
142   if (intelImage->base.ImageOffsets) {
143      free(intelImage->base.ImageOffsets);
144      intelImage->base.ImageOffsets = NULL;
145   }
146
147   _mesa_reference_renderbuffer(&intelImage->depth_rb, NULL);
148   _mesa_reference_renderbuffer(&intelImage->stencil_rb, NULL);
149}
150
151/**
152 * Map texture memory/buffer into user space.
153 * Note: the region of interest parameters are ignored here.
154 * \param mode  bitmask of GL_MAP_READ_BIT, GL_MAP_WRITE_BIT
155 * \param mapOut  returns start of mapping of region of interest
156 * \param rowStrideOut  returns row stride in bytes
157 */
158static void
159intel_map_texture_image(struct gl_context *ctx,
160			struct gl_texture_image *tex_image,
161			GLuint slice,
162			GLuint x, GLuint y, GLuint w, GLuint h,
163			GLbitfield mode,
164			GLubyte **map,
165			GLint *stride)
166{
167   struct intel_context *intel = intel_context(ctx);
168   struct intel_texture_image *intel_image = intel_texture_image(tex_image);
169   struct intel_mipmap_tree *mt = intel_image->mt;
170   unsigned int bw, bh;
171
172   /* Check that our caller wasn't confused about how to map a 1D texture. */
173   assert(tex_image->TexObject->Target != GL_TEXTURE_1D_ARRAY ||
174	  h == 1);
175
176   if (intel_image->stencil_rb) {
177      /*
178       * The texture has packed depth/stencil format, but uses separate
179       * stencil. The texture's embedded stencil buffer contains the real
180       * stencil data, so copy that into the miptree.
181       */
182      intel_tex_image_s8z24_gather(intel, intel_image);
183   }
184
185   /* For compressed formats, the stride is the number of bytes per
186    * row of blocks.  intel_miptree_get_image_offset() already does
187    * the divide.
188    */
189   _mesa_get_format_block_size(tex_image->TexFormat, &bw, &bh);
190   assert(y % bh == 0);
191   y /= bh;
192
193   if (likely(mt)) {
194      void *base = intel_region_map(intel, mt->region, mode);
195      unsigned int image_x, image_y;
196
197      intel_miptree_get_image_offset(mt, tex_image->Level, tex_image->Face,
198				     slice, &image_x, &image_y);
199      x += image_x;
200      y += image_y;
201
202      *stride = mt->region->pitch * mt->cpp;
203      *map = base + y * *stride + x * mt->cpp;
204
205      DBG("%s: %d,%d %dx%d from mt %p %d,%d = %p/%d\n", __FUNCTION__,
206	  x - image_x, y - image_y, w, h,
207	  mt, x, y, *map, *stride);
208   } else {
209      /* texture data is in malloc'd memory */
210      GLuint width = tex_image->Width;
211      GLuint height = ALIGN(tex_image->Height, bh) / bh;
212      GLuint texelSize = _mesa_get_format_bytes(tex_image->TexFormat);
213
214      assert(map);
215
216      *stride = _mesa_format_row_stride(tex_image->TexFormat, width);
217      *map = intel_image->base.Buffer + (slice * height + y) * *stride + x * texelSize;
218
219      DBG("%s: %d,%d %dx%d from data %p = %p/%d\n", __FUNCTION__,
220	  x, y, w, h,
221	  intel_image->base.Buffer, *map, *stride);
222   }
223}
224
225static void
226intel_unmap_texture_image(struct gl_context *ctx,
227			  struct gl_texture_image *tex_image, GLuint slice)
228{
229   struct intel_context *intel = intel_context(ctx);
230   struct intel_texture_image *intel_image = intel_texture_image(tex_image);
231
232   if (intel_image->mt)
233      intel_region_unmap(intel, intel_image->mt->region);
234
235   if (intel_image->stencil_rb) {
236      /*
237       * The texture has packed depth/stencil format, but uses separate
238       * stencil. The texture's embedded stencil buffer contains the real
239       * stencil data, so copy that into the miptree.
240       */
241      intel_tex_image_s8z24_scatter(intel, intel_image);
242   }
243}
244
245/**
246 * Called via ctx->Driver.GenerateMipmap()
247 * This is basically a wrapper for _mesa_meta_GenerateMipmap() which checks
248 * if we'll be using software mipmap generation.  In that case, we need to
249 * map/unmap the base level texture image.
250 */
251static void
252intelGenerateMipmap(struct gl_context *ctx, GLenum target,
253                    struct gl_texture_object *texObj)
254{
255   if (_mesa_meta_check_generate_mipmap_fallback(ctx, target, texObj)) {
256      fallback_debug("%s - fallback to swrast\n", __FUNCTION__);
257
258      _mesa_generate_mipmap(ctx, target, texObj);
259   }
260   else {
261      _mesa_meta_GenerateMipmap(ctx, target, texObj);
262   }
263}
264
265
266void
267intelInitTextureFuncs(struct dd_function_table *functions)
268{
269   functions->GenerateMipmap = intelGenerateMipmap;
270
271   functions->NewTextureObject = intelNewTextureObject;
272   functions->NewTextureImage = intelNewTextureImage;
273   functions->DeleteTextureImage = intelDeleteTextureImage;
274   functions->DeleteTexture = intelDeleteTextureObject;
275   functions->AllocTextureImageBuffer = intel_alloc_texture_image_buffer;
276   functions->FreeTextureImageBuffer = intel_free_texture_image_buffer;
277   functions->MapTextureImage = intel_map_texture_image;
278   functions->UnmapTextureImage = intel_unmap_texture_image;
279}
280