--- /dev/null
+/**************************************************************************
+ *
+ * Copyright 2006 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sub license, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
+ * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ **************************************************************************/
+ /*
+ * Authors:
+ * Keith Whitwell <keith@tungstengraphics.com>
+ * Michel Dänzer <michel@tungstengraphics.com>
+ */
+
+#include "macros.h"
+#include "pipe/p_state.h"
+#include "pipe/p_context.h"
+#include "i915_tex_layout.h"
+
+
+static GLuint minify( GLuint d )
+{
+ return MAX2(1, d>>1);
+}
+
+static int align(int value, int alignment)
+{
+ return (value + alignment - 1) & ~(alignment - 1);
+}
+
+
+static void
+i915_miptree_set_level_info(struct pipe_mipmap_tree *mt,
+ GLuint level,
+ GLuint nr_images,
+ GLuint x, GLuint y, GLuint w, GLuint h, GLuint d)
+{
+ assert(level < MAX_TEXTURE_LEVELS);
+
+ mt->level[level].width = w;
+ mt->level[level].height = h;
+ mt->level[level].depth = d;
+ mt->level[level].level_offset = (x + y * mt->pitch) * mt->cpp;
+ mt->level[level].nr_images = nr_images;
+
+ /*
+ DBG("%s level %d size: %d,%d,%d offset %d,%d (0x%x)\n", __FUNCTION__,
+ level, w, h, d, x, y, mt->level[level].level_offset);
+ */
+
+ /* Not sure when this would happen, but anyway:
+ */
+ if (mt->level[level].image_offset) {
+ free(mt->level[level].image_offset);
+ mt->level[level].image_offset = NULL;
+ }
+
+ assert(nr_images);
+ assert(!mt->level[level].image_offset);
+
+ mt->level[level].image_offset = (GLuint *) malloc(nr_images * sizeof(GLuint));
+ mt->level[level].image_offset[0] = 0;
+}
+
+
+static void
+i915_miptree_set_image_offset(struct pipe_mipmap_tree *mt,
+ GLuint level, GLuint img, GLuint x, GLuint y)
+{
+ if (img == 0 && level == 0)
+ assert(x == 0 && y == 0);
+
+ assert(img < mt->level[level].nr_images);
+
+ mt->level[level].image_offset[img] = (x + y * mt->pitch);
+
+ /*
+ DBG("%s level %d img %d pos %d,%d image_offset %x\n",
+ __FUNCTION__, level, img, x, y, mt->level[level].image_offset[img]);
+ */
+}
+
+
+static void
+i945_miptree_layout_2d( struct pipe_mipmap_tree *mt )
+{
+ GLint align_h = 2, align_w = 4;
+ GLuint level;
+ GLuint x = 0;
+ GLuint y = 0;
+ GLuint width = mt->width0;
+ GLuint height = mt->height0;
+
+ mt->pitch = mt->width0;
+
+ /* May need to adjust pitch to accomodate the placement of
+ * the 2nd mipmap. This occurs when the alignment
+ * constraints of mipmap placement push the right edge of the
+ * 2nd mipmap out past the width of its parent.
+ */
+ if (mt->first_level != mt->last_level) {
+ GLuint mip1_width = align(minify(mt->width0), align_w)
+ + minify(minify(mt->width0));
+
+ if (mip1_width > mt->width0)
+ mt->pitch = mip1_width;
+ }
+
+ /* Pitch must be a whole number of dwords, even though we
+ * express it in texels.
+ */
+ mt->pitch = align(mt->pitch * mt->cpp, 4) / mt->cpp;
+ mt->total_height = 0;
+
+ for ( level = mt->first_level ; level <= mt->last_level ; level++ ) {
+ GLuint img_height;
+
+ i915_miptree_set_level_info(mt, level, 1, x, y, width, height, 1);
+
+ if (mt->compressed)
+ img_height = MAX2(1, height/4);
+ else
+ img_height = align(height, align_h);
+
+
+ /* Because the images are packed better, the final offset
+ * might not be the maximal one:
+ */
+ mt->total_height = MAX2(mt->total_height, y + img_height);
+
+ /* Layout_below: step right after second mipmap.
+ */
+ if (level == mt->first_level + 1) {
+ x += align(width, align_w);
+ }
+ else {
+ y += img_height;
+ }
+
+ width = minify(width);
+ height = minify(height);
+ }
+}
+
+
+static const GLint initial_offsets[6][2] = {
+ {0, 0},
+ {0, 2},
+ {1, 0},
+ {1, 2},
+ {1, 1},
+ {1, 3}
+};
+
+static const GLint step_offsets[6][2] = {
+ {0, 2},
+ {0, 2},
+ {-1, 2},
+ {-1, 2},
+ {-1, 1},
+ {-1, 1}
+};
+
+
+GLboolean
+i915_miptree_layout(struct pipe_context *pipe, struct pipe_mipmap_tree * mt)
+{
+ GLint level;
+
+ switch (mt->target) {
+ case GL_TEXTURE_CUBE_MAP:{
+ const GLuint dim = mt->width0;
+ GLuint face;
+ GLuint lvlWidth = mt->width0, lvlHeight = mt->height0;
+
+ assert(lvlWidth == lvlHeight); /* cubemap images are square */
+
+ /* double pitch for cube layouts */
+ mt->pitch = ((dim * mt->cpp * 2 + 3) & ~3) / mt->cpp;
+ mt->total_height = dim * 4;
+
+ for (level = mt->first_level; level <= mt->last_level; level++) {
+ i915_miptree_set_level_info(mt, level, 6,
+ 0, 0,
+ /*OLD: mt->pitch, mt->total_height,*/
+ lvlWidth, lvlHeight,
+ 1);
+ lvlWidth /= 2;
+ lvlHeight /= 2;
+ }
+
+ for (face = 0; face < 6; face++) {
+ GLuint x = initial_offsets[face][0] * dim;
+ GLuint y = initial_offsets[face][1] * dim;
+ GLuint d = dim;
+
+ for (level = mt->first_level; level <= mt->last_level; level++) {
+ i915_miptree_set_image_offset(mt, level, face, x, y);
+
+ if (d == 0)
+ _mesa_printf("cube mipmap %d/%d (%d..%d) is 0x0\n",
+ face, level, mt->first_level, mt->last_level);
+
+ d >>= 1;
+ x += step_offsets[face][0] * d;
+ y += step_offsets[face][1] * d;
+ }
+ }
+ break;
+ }
+ case GL_TEXTURE_3D:{
+ GLuint width = mt->width0;
+ GLuint height = mt->height0;
+ GLuint depth = mt->depth0;
+ GLuint stack_height = 0;
+
+ /* Calculate the size of a single slice.
+ */
+ mt->pitch = ((mt->width0 * mt->cpp + 3) & ~3) / mt->cpp;
+
+ /* XXX: hardware expects/requires 9 levels at minimum.
+ */
+ for (level = mt->first_level; level <= MAX2(8, mt->last_level);
+ level++) {
+ i915_miptree_set_level_info(mt, level, depth, 0, mt->total_height,
+ width, height, depth);
+
+
+ stack_height += MAX2(2, height);
+
+ width = minify(width);
+ height = minify(height);
+ depth = minify(depth);
+ }
+
+ /* Fixup depth image_offsets:
+ */
+ depth = mt->depth0;
+ for (level = mt->first_level; level <= mt->last_level; level++) {
+ GLuint i;
+ for (i = 0; i < depth; i++)
+ i915_miptree_set_image_offset(mt, level, i,
+ 0, i * stack_height);
+
+ depth = minify(depth);
+ }
+
+
+ /* Multiply slice size by texture depth for total size. It's
+ * remarkable how wasteful of memory the i915 texture layouts
+ * are. They are largely fixed in the i945.
+ */
+ mt->total_height = stack_height * mt->depth0;
+ break;
+ }
+
+ default:{
+ GLuint width = mt->width0;
+ GLuint height = mt->height0;
+ GLuint img_height;
+
+ mt->pitch = ((mt->width0 * mt->cpp + 3) & ~3) / mt->cpp;
+ mt->total_height = 0;
+
+ for (level = mt->first_level; level <= mt->last_level; level++) {
+ i915_miptree_set_level_info(mt, level, 1,
+ 0, mt->total_height,
+ width, height, 1);
+
+ if (mt->compressed)
+ img_height = MAX2(1, height / 4);
+ else
+ img_height = (MAX2(2, height) + 1) & ~1;
+
+ mt->total_height += img_height;
+
+ width = minify(width);
+ height = minify(height);
+ }
+ break;
+ }
+ }
+ /*
+ DBG("%s: %dx%dx%d - sz 0x%x\n", __FUNCTION__,
+ mt->pitch,
+ mt->total_height, mt->cpp, mt->pitch * mt->total_height * mt->cpp);
+ */
+
+ return GL_TRUE;
+}
+
+
+GLboolean
+i945_miptree_layout(struct pipe_context *pipe, struct pipe_mipmap_tree * mt)
+{
+ GLint level;
+
+ switch (mt->target) {
+ case GL_TEXTURE_CUBE_MAP:{
+ const GLuint dim = mt->width0;
+ GLuint face;
+ GLuint lvlWidth = mt->width0, lvlHeight = mt->height0;
+
+ assert(lvlWidth == lvlHeight); /* cubemap images are square */
+
+ /* Depending on the size of the largest images, pitch can be
+ * determined either by the old-style packing of cubemap faces,
+ * or the final row of 4x4, 2x2 and 1x1 faces below this.
+ */
+ if (dim > 32)
+ mt->pitch = ((dim * mt->cpp * 2 + 3) & ~3) / mt->cpp;
+ else
+ mt->pitch = 14 * 8;
+
+ mt->total_height = dim * 4 + 4;
+
+ /* Set all the levels to effectively occupy the whole rectangular region.
+ */
+ for (level = mt->first_level; level <= mt->last_level; level++) {
+ i915_miptree_set_level_info(mt, level, 6,
+ 0, 0,
+ lvlWidth, lvlHeight, 1);
+ lvlWidth /= 2;
+ lvlHeight /= 2;
+ }
+
+
+ for (face = 0; face < 6; face++) {
+ GLuint x = initial_offsets[face][0] * dim;
+ GLuint y = initial_offsets[face][1] * dim;
+ GLuint d = dim;
+
+ if (dim == 4 && face >= 4) {
+ y = mt->total_height - 4;
+ x = (face - 4) * 8;
+ }
+ else if (dim < 4 && (face > 0 || mt->first_level > 0)) {
+ y = mt->total_height - 4;
+ x = face * 8;
+ }
+
+ for (level = mt->first_level; level <= mt->last_level; level++) {
+ i915_miptree_set_image_offset(mt, level, face, x, y);
+
+ d >>= 1;
+
+ switch (d) {
+ case 4:
+ switch (face) {
+ case FACE_POS_X:
+ case FACE_NEG_X:
+ x += step_offsets[face][0] * d;
+ y += step_offsets[face][1] * d;
+ break;
+ case FACE_POS_Y:
+ case FACE_NEG_Y:
+ y += 12;
+ x -= 8;
+ break;
+ case FACE_POS_Z:
+ case FACE_NEG_Z:
+ y = mt->total_height - 4;
+ x = (face - 4) * 8;
+ break;
+ }
+
+ case 2:
+ y = mt->total_height - 4;
+ x = 16 + face * 8;
+ break;
+
+ case 1:
+ x += 48;
+ break;
+
+ default:
+ x += step_offsets[face][0] * d;
+ y += step_offsets[face][1] * d;
+ break;
+ }
+ }
+ }
+ break;
+ }
+ case GL_TEXTURE_3D:{
+ GLuint width = mt->width0;
+ GLuint height = mt->height0;
+ GLuint depth = mt->depth0;
+ GLuint pack_x_pitch, pack_x_nr;
+ GLuint pack_y_pitch;
+ GLuint level;
+
+ mt->pitch = ((mt->width0 * mt->cpp + 3) & ~3) / mt->cpp;
+ mt->total_height = 0;
+
+ pack_y_pitch = MAX2(mt->height0, 2);
+ pack_x_pitch = mt->pitch;
+ pack_x_nr = 1;
+
+ for (level = mt->first_level; level <= mt->last_level; level++) {
+ GLuint nr_images = mt->target == GL_TEXTURE_3D ? depth : 6;
+ GLint x = 0;
+ GLint y = 0;
+ GLint q, j;
+
+ i915_miptree_set_level_info(mt, level, nr_images,
+ 0, mt->total_height,
+ width, height, depth);
+
+ for (q = 0; q < nr_images;) {
+ for (j = 0; j < pack_x_nr && q < nr_images; j++, q++) {
+ i915_miptree_set_image_offset(mt, level, q, x, y);
+ x += pack_x_pitch;
+ }
+
+ x = 0;
+ y += pack_y_pitch;
+ }
+
+
+ mt->total_height += y;
+
+ if (pack_x_pitch > 4) {
+ pack_x_pitch >>= 1;
+ pack_x_nr <<= 1;
+ assert(pack_x_pitch * pack_x_nr <= mt->pitch);
+ }
+
+ if (pack_y_pitch > 2) {
+ pack_y_pitch >>= 1;
+ }
+
+ width = minify(width);
+ height = minify(height);
+ depth = minify(depth);
+ }
+ break;
+ }
+
+ case GL_TEXTURE_1D:
+ case GL_TEXTURE_2D:
+ case GL_TEXTURE_RECTANGLE_ARB:
+ i945_miptree_layout_2d(mt);
+ break;
+ default:
+ _mesa_problem(NULL, "Unexpected tex target in i945_miptree_layout()");
+ }
+
+ /*
+ DBG("%s: %dx%dx%d - sz 0x%x\n", __FUNCTION__,
+ mt->pitch,
+ mt->total_height, mt->cpp, mt->pitch * mt->total_height * mt->cpp);
+ */
+
+ return GL_TRUE;
+}
+
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