src/mesa/drivers/dri/i915/intel_tex.c

   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 #include "intel_fbo.h"
  11
  12 #define FILE_DEBUG_FLAG DEBUG_TEXTURE
  13
  14 static struct gl_texture_image *
  15 intelNewTextureImage(struct gl_context * ctx)
  16 {
  17    DBG("%s\n", __func__);
  18    (void) ctx;
  19    return (struct gl_texture_image *) CALLOC_STRUCT(intel_texture_image);
  20 }
  21
  22 static void
  23 intelDeleteTextureImage(struct gl_context * ctx, struct gl_texture_image *img)
  24 {
  25    /* nothing special (yet) for intel_texture_image */
  26    _mesa_delete_texture_image(ctx, img);
  27 }
  28
  29
  30 static struct gl_texture_object *
  31 intelNewTextureObject(struct gl_context * ctx, GLuint name, GLenum target)
  32 {
  33    struct intel_texture_object *obj = CALLOC_STRUCT(intel_texture_object);
  34
  35    (void) ctx;
  36
  37    DBG("%s\n", __func__);
  38
  39    if (obj == NULL)
  40       return NULL;
  41
  42    _mesa_initialize_texture_object(ctx, &obj->base, name, target);
  43
  44    obj->needs_validate = true;
  45
  46    return &obj->base;
  47 }
  48
  49 static void
  50 intelDeleteTextureObject(struct gl_context *ctx,
  51                          struct gl_texture_object *texObj)
  52 {
  53    struct intel_texture_object *intelObj = intel_texture_object(texObj);
  54
  55    intel_miptree_release(&intelObj->mt);
  56    _mesa_delete_texture_object(ctx, texObj);
  57 }
  58
  59 static GLboolean
  60 intel_alloc_texture_image_buffer(struct gl_context *ctx,
  61                                  struct gl_texture_image *image)
  62 {
  63    struct intel_context *intel = intel_context(ctx);
  64    struct intel_texture_image *intel_image = intel_texture_image(image);
  65    struct gl_texture_object *texobj = image->TexObject;
  66    struct intel_texture_object *intel_texobj = intel_texture_object(texobj);
  67
  68    assert(image->Border == 0);
  69
  70    /* Because the driver uses AllocTextureImageBuffer() internally, it may end
  71     * up mismatched with FreeTextureImageBuffer(), but that is safe to call
  72     * multiple times.
  73     */
  74    ctx->Driver.FreeTextureImageBuffer(ctx, image);
  75
  76    if (!_swrast_init_texture_image(image))
  77       return false;
  78
  79    if (intel_texobj->mt &&
  80        intel_miptree_match_image(intel_texobj->mt, image)) {
  81       intel_miptree_reference(&intel_image->mt, intel_texobj->mt);
  82       DBG("%s: alloc obj %p level %d %dx%dx%d using object's miptree %p\n",
  83           __func__, texobj, image->Level,
  84           image->Width, image->Height, image->Depth, intel_texobj->mt);
  85    } else {
  86       intel_image->mt = intel_miptree_create_for_teximage(intel, intel_texobj,
  87                                                           intel_image,
  88                                                           false);
  89
  90       /* Even if the object currently has a mipmap tree associated
  91        * with it, this one is a more likely candidate to represent the
  92        * whole object since our level didn't fit what was there
  93        * before, and any lower levels would fit into our miptree.
  94        */
  95       intel_miptree_reference(&intel_texobj->mt, intel_image->mt);
  96
  97       DBG("%s: alloc obj %p level %d %dx%dx%d using new miptree %p\n",
  98           __func__, texobj, image->Level,
  99           image->Width, image->Height, image->Depth, intel_image->mt);
 100    }
 101
 102    intel_texobj->needs_validate = true;
 103
 104    return true;
 105 }
 106
 107 static void
 108 intel_free_texture_image_buffer(struct gl_context * ctx,
 109                                 struct gl_texture_image *texImage)
 110 {
 111    struct intel_texture_image *intelImage = intel_texture_image(texImage);
 112
 113    DBG("%s\n", __func__);
 114
 115    intel_miptree_release(&intelImage->mt);
 116
 117    _swrast_free_texture_image_buffer(ctx, texImage);
 118 }
 119
 120 /**
 121  * Map texture memory/buffer into user space.
 122  * Note: the region of interest parameters are ignored here.
 123  * \param mode  bitmask of GL_MAP_READ_BIT, GL_MAP_WRITE_BIT
 124  * \param mapOut  returns start of mapping of region of interest
 125  * \param rowStrideOut  returns row stride in bytes
 126  */
 127 static void
 128 intel_map_texture_image(struct gl_context *ctx,
 129                         struct gl_texture_image *tex_image,
 130                         GLuint slice,
 131                         GLuint x, GLuint y, GLuint w, GLuint h,
 132                         GLbitfield mode,
 133                         GLubyte **map,
 134                         GLint *stride)
 135 {
 136    struct intel_context *intel = intel_context(ctx);
 137    struct intel_texture_image *intel_image = intel_texture_image(tex_image);
 138    struct intel_mipmap_tree *mt = intel_image->mt;
 139
 140    /* Our texture data is always stored in a miptree. */
 141    assert(mt);
 142
 143    /* intel_miptree_map operates on a unified "slice" number that references the
 144     * cube face, since it's all just slices to the miptree code.
 145     */
 146    if (tex_image->TexObject->Target == GL_TEXTURE_CUBE_MAP)
 147       slice = tex_image->Face;
 148
 149    intel_miptree_map(intel, mt, tex_image->Level, slice, x, y, w, h, mode,
 150                      (void **)map, stride);
 151 }
 152
 153 static void
 154 intel_unmap_texture_image(struct gl_context *ctx,
 155                           struct gl_texture_image *tex_image, GLuint slice)
 156 {
 157    struct intel_context *intel = intel_context(ctx);
 158    struct intel_texture_image *intel_image = intel_texture_image(tex_image);
 159    struct intel_mipmap_tree *mt = intel_image->mt;
 160
 161    if (tex_image->TexObject->Target == GL_TEXTURE_CUBE_MAP)
 162       slice = tex_image->Face;
 163
 164    intel_miptree_unmap(intel, mt, tex_image->Level, slice);
 165 }
 166
 167 void
 168 intelInitTextureFuncs(struct dd_function_table *functions)
 169 {
 170    functions->NewTextureObject = intelNewTextureObject;
 171    functions->NewTextureImage = intelNewTextureImage;
 172    functions->DeleteTextureImage = intelDeleteTextureImage;
 173    functions->DeleteTexture = intelDeleteTextureObject;
 174    functions->AllocTextureImageBuffer = intel_alloc_texture_image_buffer;
 175    functions->FreeTextureImageBuffer = intel_free_texture_image_buffer;
 176    functions->MapTextureImage = intel_map_texture_image;
 177    functions->UnmapTextureImage = intel_unmap_texture_image;
 178 }