src/mesa/drivers/dri/i965/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", __FUNCTION__);
  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", __FUNCTION__);
  38
  39    if (obj == NULL)
  40       return NULL;
  41
  42    _mesa_initialize_texture_object(&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    /* Quantize sample count */
  71    if (image->NumSamples) {
  72       image->NumSamples = intel_quantize_num_samples(intel->intelScreen, image->NumSamples);
  73       if (!image->NumSamples)
  74          return false;
  75    }
  76
  77    /* Because the driver uses AllocTextureImageBuffer() internally, it may end
  78     * up mismatched with FreeTextureImageBuffer(), but that is safe to call
  79     * multiple times.
  80     */
  81    ctx->Driver.FreeTextureImageBuffer(ctx, image);
  82
  83    if (!_swrast_init_texture_image(image))
  84       return false;
  85
  86    if (intel_texobj->mt &&
  87        intel_miptree_match_image(intel_texobj->mt, image)) {
  88       intel_miptree_reference(&intel_image->mt, intel_texobj->mt);
  89       DBG("%s: alloc obj %p level %d %dx%dx%d using object's miptree %p\n",
  90           __FUNCTION__, texobj, image->Level,
  91           image->Width, image->Height, image->Depth, intel_texobj->mt);
  92    } else {
  93       intel_image->mt = intel_miptree_create_for_teximage(intel, intel_texobj,
  94                                                           intel_image,
  95                                                           false);
  96
  97       /* Even if the object currently has a mipmap tree associated
  98        * with it, this one is a more likely candidate to represent the
  99        * whole object since our level didn't fit what was there
 100        * before, and any lower levels would fit into our miptree.
 101        */
 102       intel_miptree_reference(&intel_texobj->mt, intel_image->mt);
 103
 104       DBG("%s: alloc obj %p level %d %dx%dx%d using new miptree %p\n",
 105           __FUNCTION__, texobj, image->Level,
 106           image->Width, image->Height, image->Depth, intel_image->mt);
 107    }
 108
 109    intel_texobj->needs_validate = true;
 110
 111    return true;
 112 }
 113
 114 static void
 115 intel_free_texture_image_buffer(struct gl_context * ctx,
 116                                 struct gl_texture_image *texImage)
 117 {
 118    struct intel_texture_image *intelImage = intel_texture_image(texImage);
 119
 120    DBG("%s\n", __FUNCTION__);
 121
 122    intel_miptree_release(&intelImage->mt);
 123
 124    _swrast_free_texture_image_buffer(ctx, texImage);
 125 }
 126
 127 /**
 128  * Map texture memory/buffer into user space.
 129  * Note: the region of interest parameters are ignored here.
 130  * \param mode  bitmask of GL_MAP_READ_BIT, GL_MAP_WRITE_BIT
 131  * \param mapOut  returns start of mapping of region of interest
 132  * \param rowStrideOut  returns row stride in bytes
 133  */
 134 static void
 135 intel_map_texture_image(struct gl_context *ctx,
 136                         struct gl_texture_image *tex_image,
 137                         GLuint slice,
 138                         GLuint x, GLuint y, GLuint w, GLuint h,
 139                         GLbitfield mode,
 140                         GLubyte **map,
 141                         GLint *stride)
 142 {
 143    struct intel_context *intel = intel_context(ctx);
 144    struct intel_texture_image *intel_image = intel_texture_image(tex_image);
 145    struct intel_mipmap_tree *mt = intel_image->mt;
 146
 147    /* Our texture data is always stored in a miptree. */
 148    assert(mt);
 149
 150    /* Check that our caller wasn't confused about how to map a 1D texture. */
 151    assert(tex_image->TexObject->Target != GL_TEXTURE_1D_ARRAY ||
 152           h == 1);
 153
 154    /* intel_miptree_map operates on a unified "slice" number that references the
 155     * cube face, since it's all just slices to the miptree code.
 156     */
 157    if (tex_image->TexObject->Target == GL_TEXTURE_CUBE_MAP)
 158       slice = tex_image->Face;
 159
 160    intel_miptree_map(intel, mt, tex_image->Level, slice, x, y, w, h, mode,
 161                      (void **)map, stride);
 162 }
 163
 164 static void
 165 intel_unmap_texture_image(struct gl_context *ctx,
 166                           struct gl_texture_image *tex_image, GLuint slice)
 167 {
 168    struct intel_context *intel = intel_context(ctx);
 169    struct intel_texture_image *intel_image = intel_texture_image(tex_image);
 170    struct intel_mipmap_tree *mt = intel_image->mt;
 171
 172    if (tex_image->TexObject->Target == GL_TEXTURE_CUBE_MAP)
 173       slice = tex_image->Face;
 174
 175    intel_miptree_unmap(intel, mt, tex_image->Level, slice);
 176 }
 177
 178 void
 179 intelInitTextureFuncs(struct dd_function_table *functions)
 180 {
 181    functions->NewTextureObject = intelNewTextureObject;
 182    functions->NewTextureImage = intelNewTextureImage;
 183    functions->DeleteTextureImage = intelDeleteTextureImage;
 184    functions->DeleteTexture = intelDeleteTextureObject;
 185    functions->AllocTextureImageBuffer = intel_alloc_texture_image_buffer;
 186    functions->FreeTextureImageBuffer = intel_free_texture_image_buffer;
 187    functions->MapTextureImage = intel_map_texture_image;
 188    functions->UnmapTextureImage = intel_unmap_texture_image;
 189 }