intel_tex.c revision 80513ec8b4c812b9c6249cc5824337a5f04ab34c 
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   assert(image->Border == 0);
65
66   /* Because the driver uses AllocTextureImageBuffer() internally, it may end
67    * up mismatched with FreeTextureImageBuffer(), but that is safe to call
68    * multiple times.
69    */
70   ctx->Driver.FreeTextureImageBuffer(ctx, image);
71
72   /* Allocate the swrast_texture_image::ImageOffsets array now */
73   switch (texobj->Target) {
74   case GL_TEXTURE_3D:
75   case GL_TEXTURE_2D_ARRAY:
76      slices = image->Depth;
77      break;
78   case GL_TEXTURE_1D_ARRAY:
79      slices = image->Height;
80      break;
81   default:
82      slices = 1;
83   }
84   assert(!intel_image->base.ImageOffsets);
85   intel_image->base.ImageOffsets = malloc(slices * sizeof(GLuint));
86
87   _swrast_init_texture_image(image, width, height, depth);
88
89   if (intel_texobj->mt &&
90       intel_miptree_match_image(intel_texobj->mt, image)) {
91      intel_miptree_reference(&intel_image->mt, intel_texobj->mt);
92      DBG("%s: alloc obj %p level %d %dx%dx%d using object's miptree %p\n",
93          __FUNCTION__, texobj, image->Level,
94          width, height, depth, intel_texobj->mt);
95   } else {
96      intel_image->mt = intel_miptree_create_for_teximage(intel, intel_texobj,
97                                                          intel_image,
98                                                          false);
99
100      /* Even if the object currently has a mipmap tree associated
101       * with it, this one is a more likely candidate to represent the
102       * whole object since our level didn't fit what was there
103       * before, and any lower levels would fit into our miptree.
104       */
105      intel_miptree_reference(&intel_texobj->mt, intel_image->mt);
106
107      DBG("%s: alloc obj %p level %d %dx%dx%d using new miptree %p\n",
108          __FUNCTION__, texobj, image->Level,
109          width, height, depth, intel_image->mt);
110   }
111
112   return true;
113}
114
115static void
116intel_free_texture_image_buffer(struct gl_context * ctx,
117				struct gl_texture_image *texImage)
118{
119   struct intel_texture_image *intelImage = intel_texture_image(texImage);
120
121   DBG("%s\n", __FUNCTION__);
122
123   intel_miptree_release(&intelImage->mt);
124
125   if (intelImage->base.Buffer) {
126      _mesa_align_free(intelImage->base.Buffer);
127      intelImage->base.Buffer = NULL;
128   }
129
130   if (intelImage->base.ImageOffsets) {
131      free(intelImage->base.ImageOffsets);
132      intelImage->base.ImageOffsets = NULL;
133   }
134}
135
136/**
137 * Map texture memory/buffer into user space.
138 * Note: the region of interest parameters are ignored here.
139 * \param mode  bitmask of GL_MAP_READ_BIT, GL_MAP_WRITE_BIT
140 * \param mapOut  returns start of mapping of region of interest
141 * \param rowStrideOut  returns row stride in bytes
142 */
143static void
144intel_map_texture_image(struct gl_context *ctx,
145			struct gl_texture_image *tex_image,
146			GLuint slice,
147			GLuint x, GLuint y, GLuint w, GLuint h,
148			GLbitfield mode,
149			GLubyte **map,
150			GLint *stride)
151{
152   struct intel_context *intel = intel_context(ctx);
153   struct intel_texture_image *intel_image = intel_texture_image(tex_image);
154   struct intel_mipmap_tree *mt = intel_image->mt;
155
156   /* Our texture data is always stored in a miptree. */
157   assert(mt);
158
159   /* Check that our caller wasn't confused about how to map a 1D texture. */
160   assert(tex_image->TexObject->Target != GL_TEXTURE_1D_ARRAY ||
161	  h == 1);
162
163   /* intel_miptree_map operates on a unified "slice" number that references the
164    * cube face, since it's all just slices to the miptree code.
165    */
166   if (tex_image->TexObject->Target == GL_TEXTURE_CUBE_MAP)
167      slice = tex_image->Face;
168
169   intel_miptree_map(intel, mt, tex_image->Level, slice, x, y, w, h, mode,
170		     (void **)map, stride);
171}
172
173static void
174intel_unmap_texture_image(struct gl_context *ctx,
175			  struct gl_texture_image *tex_image, GLuint slice)
176{
177   struct intel_context *intel = intel_context(ctx);
178   struct intel_texture_image *intel_image = intel_texture_image(tex_image);
179   struct intel_mipmap_tree *mt = intel_image->mt;
180
181   if (tex_image->TexObject->Target == GL_TEXTURE_CUBE_MAP)
182      slice = tex_image->Face;
183
184   intel_miptree_unmap(intel, mt, tex_image->Level, slice);
185}
186
187void
188intelInitTextureFuncs(struct dd_function_table *functions)
189{
190   functions->NewTextureObject = intelNewTextureObject;
191   functions->NewTextureImage = intelNewTextureImage;
192   functions->DeleteTextureImage = intelDeleteTextureImage;
193   functions->DeleteTexture = intelDeleteTextureObject;
194   functions->AllocTextureImageBuffer = intel_alloc_texture_image_buffer;
195   functions->FreeTextureImageBuffer = intel_free_texture_image_buffer;
196   functions->MapTextureImage = intel_map_texture_image;
197   functions->UnmapTextureImage = intel_unmap_texture_image;
198}
199