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path: root/src/gallium/drivers/i915simple/i915_texture.c
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-rw-r--r--src/gallium/drivers/i915simple/i915_texture.c536
1 files changed, 536 insertions, 0 deletions
diff --git a/src/gallium/drivers/i915simple/i915_texture.c b/src/gallium/drivers/i915simple/i915_texture.c
new file mode 100644
index 0000000000..6d37ae3d74
--- /dev/null
+++ b/src/gallium/drivers/i915simple/i915_texture.c
@@ -0,0 +1,536 @@
+/**************************************************************************
+ *
+ * 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 "pipe/p_state.h"
+#include "pipe/p_context.h"
+#include "pipe/p_defines.h"
+#include "pipe/p_inlines.h"
+#include "pipe/p_util.h"
+#include "pipe/p_winsys.h"
+
+#include "i915_context.h"
+#include "i915_texture.h"
+#include "i915_debug.h"
+
+
+static unsigned minify( unsigned d )
+{
+ return MAX2(1, d>>1);
+}
+
+
+
+static void
+i915_miptree_set_level_info(struct i915_texture *tex,
+ unsigned level,
+ unsigned nr_images,
+ unsigned x, unsigned y, unsigned w, unsigned h, unsigned d)
+{
+ struct pipe_texture *pt = &tex->base;
+
+ assert(level < PIPE_MAX_TEXTURE_LEVELS);
+
+ pt->width[level] = w;
+ pt->height[level] = h;
+ pt->depth[level] = d;
+
+ tex->level_offset[level] = (x + y * tex->pitch) * pt->cpp;
+ tex->nr_images[level] = nr_images;
+
+ /*
+ DBG("%s level %d size: %d,%d,%d offset %d,%d (0x%x)\n", __FUNCTION__,
+ level, w, h, d, x, y, tex->level_offset[level]);
+ */
+
+ /* Not sure when this would happen, but anyway:
+ */
+ if (tex->image_offset[level]) {
+ FREE(tex->image_offset[level]);
+ tex->image_offset[level] = NULL;
+ }
+
+ assert(nr_images);
+ assert(!tex->image_offset[level]);
+
+ tex->image_offset[level] = (unsigned *) MALLOC(nr_images * sizeof(unsigned));
+ tex->image_offset[level][0] = 0;
+}
+
+
+static void
+i915_miptree_set_image_offset(struct i915_texture *tex,
+ unsigned level, unsigned img, unsigned x, unsigned y)
+{
+ if (img == 0 && level == 0)
+ assert(x == 0 && y == 0);
+
+ assert(img < tex->nr_images[level]);
+
+ tex->image_offset[level][img] = (x + y * tex->pitch);
+
+ /*
+ DBG("%s level %d img %d pos %d,%d image_offset %x\n",
+ __FUNCTION__, level, img, x, y, tex->image_offset[level][img]);
+ */
+}
+
+
+static void
+i945_miptree_layout_2d( struct i915_texture *tex )
+{
+ struct pipe_texture *pt = &tex->base;
+ int align_h = 2, align_w = 4;
+ unsigned level;
+ unsigned x = 0;
+ unsigned y = 0;
+ unsigned width = pt->width[0];
+ unsigned height = pt->height[0];
+
+ tex->pitch = pt->width[0];
+
+ /* May need to adjust pitch to accomodate the placement of
+ * the 2nd mipmap level. This occurs when the alignment
+ * constraints of mipmap placement push the right edge of the
+ * 2nd mipmap level out past the width of its parent.
+ */
+ if (pt->last_level > 0) {
+ unsigned mip1_width = align_int(minify(pt->width[0]), align_w)
+ + minify(minify(pt->width[0]));
+
+ if (mip1_width > pt->width[0])
+ tex->pitch = mip1_width;
+ }
+
+ /* Pitch must be a whole number of dwords, even though we
+ * express it in texels.
+ */
+ tex->pitch = align_int(tex->pitch * pt->cpp, 4) / pt->cpp;
+ tex->total_height = 0;
+
+ for (level = 0; level <= pt->last_level; level++) {
+ unsigned img_height;
+
+ i915_miptree_set_level_info(tex, level, 1, x, y, width, height, 1);
+
+ if (pt->compressed)
+ img_height = MAX2(1, height/4);
+ else
+ img_height = align_int(height, align_h);
+
+
+ /* Because the images are packed better, the final offset
+ * might not be the maximal one:
+ */
+ tex->total_height = MAX2(tex->total_height, y + img_height);
+
+ /* Layout_below: step right after second mipmap level.
+ */
+ if (level == 1) {
+ x += align_int(width, align_w);
+ }
+ else {
+ y += img_height;
+ }
+
+ width = minify(width);
+ height = minify(height);
+ }
+}
+
+
+static const int initial_offsets[6][2] = {
+ {0, 0},
+ {0, 2},
+ {1, 0},
+ {1, 2},
+ {1, 1},
+ {1, 3}
+};
+
+static const int step_offsets[6][2] = {
+ {0, 2},
+ {0, 2},
+ {-1, 2},
+ {-1, 2},
+ {-1, 1},
+ {-1, 1}
+};
+
+
+static boolean
+i915_miptree_layout(struct pipe_context *pipe, struct i915_texture * tex)
+{
+ struct pipe_texture *pt = &tex->base;
+ unsigned level;
+
+ switch (pt->target) {
+ case PIPE_TEXTURE_CUBE: {
+ const unsigned dim = pt->width[0];
+ unsigned face;
+ unsigned lvlWidth = pt->width[0], lvlHeight = pt->height[0];
+
+ assert(lvlWidth == lvlHeight); /* cubemap images are square */
+
+ /* double pitch for cube layouts */
+ tex->pitch = ((dim * pt->cpp * 2 + 3) & ~3) / pt->cpp;
+ tex->total_height = dim * 4;
+
+ for (level = 0; level <= pt->last_level; level++) {
+ i915_miptree_set_level_info(tex, level, 6,
+ 0, 0,
+ /*OLD: tex->pitch, tex->total_height,*/
+ lvlWidth, lvlHeight,
+ 1);
+ lvlWidth /= 2;
+ lvlHeight /= 2;
+ }
+
+ for (face = 0; face < 6; face++) {
+ unsigned x = initial_offsets[face][0] * dim;
+ unsigned y = initial_offsets[face][1] * dim;
+ unsigned d = dim;
+
+ for (level = 0; level <= pt->last_level; level++) {
+ i915_miptree_set_image_offset(tex, level, face, x, y);
+ d >>= 1;
+ x += step_offsets[face][0] * d;
+ y += step_offsets[face][1] * d;
+ }
+ }
+ break;
+ }
+ case PIPE_TEXTURE_3D:{
+ unsigned width = pt->width[0];
+ unsigned height = pt->height[0];
+ unsigned depth = pt->depth[0];
+ unsigned stack_height = 0;
+
+ /* Calculate the size of a single slice.
+ */
+ tex->pitch = ((pt->width[0] * pt->cpp + 3) & ~3) / pt->cpp;
+
+ /* XXX: hardware expects/requires 9 levels at minimum.
+ */
+ for (level = 0; level <= MAX2(8, pt->last_level);
+ level++) {
+ i915_miptree_set_level_info(tex, level, depth, 0, tex->total_height,
+ width, height, depth);
+
+
+ stack_height += MAX2(2, height);
+
+ width = minify(width);
+ height = minify(height);
+ depth = minify(depth);
+ }
+
+ /* Fixup depth image_offsets:
+ */
+ depth = pt->depth[0];
+ for (level = 0; level <= pt->last_level; level++) {
+ unsigned i;
+ for (i = 0; i < depth; i++)
+ i915_miptree_set_image_offset(tex, 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.
+ */
+ tex->total_height = stack_height * pt->depth[0];
+ break;
+ }
+
+ default:{
+ unsigned width = pt->width[0];
+ unsigned height = pt->height[0];
+ unsigned img_height;
+
+ tex->pitch = ((pt->width[0] * pt->cpp + 3) & ~3) / pt->cpp;
+ tex->total_height = 0;
+
+ for (level = 0; level <= pt->last_level; level++) {
+ i915_miptree_set_level_info(tex, level, 1,
+ 0, tex->total_height,
+ width, height, 1);
+
+ if (pt->compressed)
+ img_height = MAX2(1, height / 4);
+ else
+ img_height = (MAX2(2, height) + 1) & ~1;
+
+ tex->total_height += img_height;
+
+ width = minify(width);
+ height = minify(height);
+ }
+ break;
+ }
+ }
+ /*
+ DBG("%s: %dx%dx%d - sz 0x%x\n", __FUNCTION__,
+ tex->pitch,
+ tex->total_height, pt->cpp, tex->pitch * tex->total_height * pt->cpp);
+ */
+
+ return TRUE;
+}
+
+
+static boolean
+i945_miptree_layout(struct pipe_context *pipe, struct i915_texture * tex)
+{
+ struct pipe_texture *pt = &tex->base;
+ unsigned level;
+
+ switch (pt->target) {
+ case PIPE_TEXTURE_CUBE:{
+ const unsigned dim = pt->width[0];
+ unsigned face;
+ unsigned lvlWidth = pt->width[0], lvlHeight = pt->height[0];
+
+ 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)
+ tex->pitch = ((dim * pt->cpp * 2 + 3) & ~3) / pt->cpp;
+ else
+ tex->pitch = 14 * 8;
+
+ tex->total_height = dim * 4 + 4;
+
+ /* Set all the levels to effectively occupy the whole rectangular region.
+ */
+ for (level = 0; level <= pt->last_level; level++) {
+ i915_miptree_set_level_info(tex, level, 6,
+ 0, 0,
+ lvlWidth, lvlHeight, 1);
+ lvlWidth /= 2;
+ lvlHeight /= 2;
+ }
+
+
+ for (face = 0; face < 6; face++) {
+ unsigned x = initial_offsets[face][0] * dim;
+ unsigned y = initial_offsets[face][1] * dim;
+ unsigned d = dim;
+
+ if (dim == 4 && face >= 4) {
+ y = tex->total_height - 4;
+ x = (face - 4) * 8;
+ }
+ else if (dim < 4 && (face > 0)) {
+ y = tex->total_height - 4;
+ x = face * 8;
+ }
+
+ for (level = 0; level <= pt->last_level; level++) {
+ i915_miptree_set_image_offset(tex, level, face, x, y);
+
+ d >>= 1;
+
+ switch (d) {
+ case 4:
+ switch (face) {
+ case PIPE_TEX_FACE_POS_X:
+ case PIPE_TEX_FACE_NEG_X:
+ x += step_offsets[face][0] * d;
+ y += step_offsets[face][1] * d;
+ break;
+ case PIPE_TEX_FACE_POS_Y:
+ case PIPE_TEX_FACE_NEG_Y:
+ y += 12;
+ x -= 8;
+ break;
+ case PIPE_TEX_FACE_POS_Z:
+ case PIPE_TEX_FACE_NEG_Z:
+ y = tex->total_height - 4;
+ x = (face - 4) * 8;
+ break;
+ }
+
+ case 2:
+ y = tex->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 PIPE_TEXTURE_3D:{
+ unsigned width = pt->width[0];
+ unsigned height = pt->height[0];
+ unsigned depth = pt->depth[0];
+ unsigned pack_x_pitch, pack_x_nr;
+ unsigned pack_y_pitch;
+ unsigned level;
+
+ tex->pitch = ((pt->width[0] * pt->cpp + 3) & ~3) / pt->cpp;
+ tex->total_height = 0;
+
+ pack_y_pitch = MAX2(pt->height[0], 2);
+ pack_x_pitch = tex->pitch;
+ pack_x_nr = 1;
+
+ for (level = 0; level <= pt->last_level; level++) {
+ unsigned nr_images = pt->target == PIPE_TEXTURE_3D ? depth : 6;
+ int x = 0;
+ int y = 0;
+ unsigned q, j;
+
+ i915_miptree_set_level_info(tex, level, nr_images,
+ 0, tex->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(tex, level, q, x, y);
+ x += pack_x_pitch;
+ }
+
+ x = 0;
+ y += pack_y_pitch;
+ }
+
+
+ tex->total_height += y;
+
+ if (pack_x_pitch > 4) {
+ pack_x_pitch >>= 1;
+ pack_x_nr <<= 1;
+ assert(pack_x_pitch * pack_x_nr <= tex->pitch);
+ }
+
+ if (pack_y_pitch > 2) {
+ pack_y_pitch >>= 1;
+ }
+
+ width = minify(width);
+ height = minify(height);
+ depth = minify(depth);
+ }
+ break;
+ }
+
+ case PIPE_TEXTURE_1D:
+ case PIPE_TEXTURE_2D:
+// case PIPE_TEXTURE_RECTANGLE:
+ i945_miptree_layout_2d(tex);
+ break;
+ default:
+ assert(0);
+ return FALSE;
+ }
+
+ /*
+ DBG("%s: %dx%dx%d - sz 0x%x\n", __FUNCTION__,
+ tex->pitch,
+ tex->total_height, pt->cpp, tex->pitch * tex->total_height * pt->cpp);
+ */
+
+ return TRUE;
+}
+
+
+struct pipe_texture *
+i915_texture_create(struct pipe_context *pipe,
+ const struct pipe_texture *templat)
+{
+ struct i915_texture *tex = CALLOC_STRUCT(i915_texture);
+
+ if (tex) {
+ struct i915_context *i915 = i915_context(pipe);
+
+ tex->base = *templat;
+
+ if (i915->flags.is_i945 ? i945_miptree_layout(pipe, tex) :
+ i915_miptree_layout(pipe, tex))
+ tex->buffer = pipe->winsys->buffer_create(pipe->winsys, 64,
+ PIPE_BUFFER_USAGE_PIXEL,
+ tex->pitch * tex->base.cpp *
+ tex->total_height);
+
+ if (!tex->buffer) {
+ FREE(tex);
+ return NULL;
+ }
+ }
+
+ return &tex->base;
+}
+
+
+void
+i915_texture_release(struct pipe_context *pipe, struct pipe_texture **pt)
+{
+ if (!*pt)
+ return;
+
+ /*
+ DBG("%s %p refcount will be %d\n",
+ __FUNCTION__, (void *) *pt, (*pt)->refcount - 1);
+ */
+ if (--(*pt)->refcount <= 0) {
+ struct i915_texture *tex = (struct i915_texture *)*pt;
+ uint i;
+
+ /*
+ DBG("%s deleting %p\n", __FUNCTION__, (void *) tex);
+ */
+
+ pipe_buffer_reference(pipe->winsys, &tex->buffer, NULL);
+
+ for (i = 0; i < PIPE_MAX_TEXTURE_LEVELS; i++)
+ if (tex->image_offset[i])
+ FREE(tex->image_offset[i]);
+
+ FREE(tex);
+ }
+ *pt = NULL;
+}
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