intel_tex.c revision f8377b411dfe3c879eaab11bb86f509178796bd1 
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
63   /* Because the driver uses AllocTextureImageBuffer() internally, it may end
64    * up mismatched with FreeTextureImageBuffer(), but that is safe to call
65    * multiple times.
66    */
67   ctx->Driver.FreeTextureImageBuffer(ctx, image);
68
69   if (intel_texobj->mt &&
70       intel_miptree_match_image(intel_texobj->mt, image)) {
71      intel_miptree_reference(&intel_image->mt, intel_texobj->mt);
72      DBG("%s: alloc obj %p level %d %dx%dx%d using object's miptree %p\n",
73          __FUNCTION__, texobj, image->Level,
74          width, height, depth, intel_texobj->mt);
75      return true;
76   } else if (image->Border == 0) {
77      intel_image->mt = intel_miptree_create_for_teximage(intel, intel_texobj,
78                                                          intel_image,
79                                                          false);
80
81      /* Even if the object currently has a mipmap tree associated
82       * with it, this one is a more likely candidate to represent the
83       * whole object since our level didn't fit what was there
84       * before, and any lower levels would fit into our miptree.
85       */
86      intel_miptree_reference(&intel_texobj->mt, intel_image->mt);
87
88      if (intel->must_use_separate_stencil
89          && image->TexFormat == MESA_FORMAT_S8_Z24) {
90         intel_tex_image_s8z24_create_renderbuffers(intel, intel_image);
91      }
92
93      DBG("%s: alloc obj %p level %d %dx%dx%d using new miptree %p\n",
94          __FUNCTION__, texobj, image->Level,
95          width, height, depth, intel_image->mt);
96      return true;
97   }
98
99   DBG("%s: alloc obj %p level %d %dx%dx%d using swrast\n",
100       __FUNCTION__, texobj, image->Level, width, height, depth);
101
102   return _swrast_alloc_texture_image_buffer(ctx, image, format,
103					     width, height, depth);
104}
105
106static void
107intel_free_texture_image_buffer(struct gl_context * ctx,
108				struct gl_texture_image *texImage)
109{
110   struct intel_texture_image *intelImage = intel_texture_image(texImage);
111
112   DBG("%s\n", __FUNCTION__);
113
114   intel_miptree_release(&intelImage->mt);
115
116   if (texImage->Data) {
117      _mesa_free_texmemory(texImage->Data);
118      texImage->Data = NULL;
119   }
120
121   _mesa_reference_renderbuffer(&intelImage->depth_rb, NULL);
122   _mesa_reference_renderbuffer(&intelImage->stencil_rb, NULL);
123}
124
125/**
126 * Map texture memory/buffer into user space.
127 * Note: the region of interest parameters are ignored here.
128 * \param mode  bitmask of GL_MAP_READ_BIT, GL_MAP_WRITE_BIT
129 * \param mapOut  returns start of mapping of region of interest
130 * \param rowStrideOut  returns row stride in bytes
131 */
132static void
133intel_map_texture_image(struct gl_context *ctx,
134			struct gl_texture_image *tex_image,
135			GLuint slice,
136			GLuint x, GLuint y, GLuint w, GLuint h,
137			GLbitfield mode,
138			GLubyte **map,
139			GLint *stride)
140{
141   struct intel_context *intel = intel_context(ctx);
142   struct intel_texture_image *intel_image = intel_texture_image(tex_image);
143   struct intel_mipmap_tree *mt = intel_image->mt;
144   unsigned int bw, bh;
145
146   /* Check that our caller wasn't confused about how to map a 1D texture. */
147   assert(tex_image->TexObject->Target != GL_TEXTURE_1D_ARRAY ||
148	  h == 1);
149
150   if (intel_image->stencil_rb) {
151      /*
152       * The texture has packed depth/stencil format, but uses separate
153       * stencil. The texture's embedded stencil buffer contains the real
154       * stencil data, so copy that into the miptree.
155       */
156      intel_tex_image_s8z24_gather(intel, intel_image);
157   }
158
159   /* For compressed formats, the stride is the number of bytes per
160    * row of blocks.  intel_miptree_get_image_offset() already does
161    * the divide.
162    */
163   _mesa_get_format_block_size(tex_image->TexFormat, &bw, &bh);
164   assert(y % bh == 0);
165   y /= bh;
166
167   if (likely(mt)) {
168      void *base = intel_region_map(intel, mt->region, mode);
169      unsigned int image_x, image_y;
170
171      intel_miptree_get_image_offset(mt, tex_image->Level, tex_image->Face,
172				     slice, &image_x, &image_y);
173      x += image_x;
174      y += image_y;
175
176      *stride = mt->region->pitch * mt->cpp;
177      *map = base + y * *stride + x * mt->cpp;
178
179      DBG("%s: %d,%d %dx%d from mt %p %d,%d = %p/%d\n", __FUNCTION__,
180	  x - image_x, y - image_y, w, h,
181	  mt, x, y, *map, *stride);
182   } else {
183      /* texture data is in malloc'd memory */
184      GLuint width = tex_image->Width;
185      GLuint height = ALIGN(tex_image->Height, bh) / bh;
186      GLuint texelSize = _mesa_get_format_bytes(tex_image->TexFormat);
187
188      assert(map);
189
190      *stride = _mesa_format_row_stride(tex_image->TexFormat, width);
191      *map = tex_image->Data + (slice * height + y) * *stride + x * texelSize;
192
193      DBG("%s: %d,%d %dx%d from data %p = %p/%d\n", __FUNCTION__,
194	  x, y, w, h,
195	  tex_image->Data, *map, *stride);
196   }
197}
198
199static void
200intel_unmap_texture_image(struct gl_context *ctx,
201			  struct gl_texture_image *tex_image, GLuint slice)
202{
203   struct intel_context *intel = intel_context(ctx);
204   struct intel_texture_image *intel_image = intel_texture_image(tex_image);
205
206   if (intel_image->mt)
207      intel_region_unmap(intel, intel_image->mt->region);
208
209   if (intel_image->stencil_rb) {
210      /*
211       * The texture has packed depth/stencil format, but uses separate
212       * stencil. The texture's embedded stencil buffer contains the real
213       * stencil data, so copy that into the miptree.
214       */
215      intel_tex_image_s8z24_scatter(intel, intel_image);
216   }
217}
218
219/**
220 * Called via ctx->Driver.GenerateMipmap()
221 * This is basically a wrapper for _mesa_meta_GenerateMipmap() which checks
222 * if we'll be using software mipmap generation.  In that case, we need to
223 * map/unmap the base level texture image.
224 */
225static void
226intelGenerateMipmap(struct gl_context *ctx, GLenum target,
227                    struct gl_texture_object *texObj)
228{
229   if (_mesa_meta_check_generate_mipmap_fallback(ctx, target, texObj)) {
230      fallback_debug("%s - fallback to swrast\n", __FUNCTION__);
231
232      _mesa_generate_mipmap(ctx, target, texObj);
233   }
234   else {
235      _mesa_meta_GenerateMipmap(ctx, target, texObj);
236   }
237}
238
239
240void
241intelInitTextureFuncs(struct dd_function_table *functions)
242{
243   functions->GenerateMipmap = intelGenerateMipmap;
244
245   functions->NewTextureObject = intelNewTextureObject;
246   functions->NewTextureImage = intelNewTextureImage;
247   functions->DeleteTextureImage = intelDeleteTextureImage;
248   functions->DeleteTexture = intelDeleteTextureObject;
249   functions->AllocTextureImageBuffer = intel_alloc_texture_image_buffer;
250   functions->FreeTextureImageBuffer = intel_free_texture_image_buffer;
251   functions->MapTextureImage = intel_map_texture_image;
252   functions->UnmapTextureImage = intel_unmap_texture_image;
253}
254