1 files changed, 228 insertions, 0 deletions
diff --git a/src/gallium/drivers/r300/r300_texture.c b/src/gallium/drivers/r300/r300_texture.c
new file mode 100644
index 0000000000..590052509c
--- /dev/null
+++ b/src/gallium/drivers/r300/r300_texture.c
@@ -0,0 +1,228 @@
+/*
+ * Copyright 2008 Corbin Simpson <MostAwesomeDude@gmail.com>
+ *
+ * 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
+ * on 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
+ * THE AUTHOR(S) AND/OR THEIR 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. */
+
+#include "r300_texture.h"
+
+static void r300_setup_texture_state(struct r300_texture* tex,
+                                     unsigned width,
+                                     unsigned height,
+                                     unsigned pitch,
+                                     unsigned levels)
+{
+    struct r300_texture_state* state = &tex->state;
+
+    state->format0 = R300_TX_WIDTH((width - 1) & 0x7ff) |
+        R300_TX_HEIGHT((height - 1) & 0x7ff) |
+        R300_TX_NUM_LEVELS(levels) |
+        R300_TX_PITCH_EN;
+
+    /* XXX */
+    state->format1 = r300_translate_texformat(tex->tex.format);
+
+    state->format2 = pitch - 1;
+
+    /* Assume (somewhat foolishly) that oversized textures will
+     * not be permitted by the state tracker. */
+    if (width > 2048) {
+        state->format2 |= R500_TXWIDTH_BIT11;
+    }
+    if (height > 2048) {
+        state->format2 |= R500_TXHEIGHT_BIT11;
+    }
+
+    debug_printf("r300: Set texture state (%dx%d, pitch %d, %d levels)\n",
+            width, height, pitch, levels);
+}
+
+static void r300_setup_miptree(struct r300_texture* tex)
+{
+    struct pipe_texture* base = &tex->tex;
+    int stride, size, offset;
+    int i;
+
+    for (i = 0; i <= base->last_level; i++) {
+        if (i > 0) {
+            base->width[i] = minify(base->width[i-1]);
+            base->height[i] = minify(base->height[i-1]);
+            base->depth[i] = minify(base->depth[i-1]);
+        }
+
+        base->nblocksx[i] = pf_get_nblocksx(&base->block, base->width[i]);
+        base->nblocksy[i] = pf_get_nblocksy(&base->block, base->height[i]);
+
+        /* Radeons enjoy things in multiples of 64.
+         *
+         * XXX
+         * POT, uncompressed, unmippmapped textures can be aligned to 32,
+         * instead of 64. */
+        stride = align(pf_get_stride(&base->block, base->width[i]), 32);
+        size = stride * base->nblocksy[i] * base->depth[i];
+
+        tex->offset[i] = align(tex->size, 32);
+        tex->size = tex->offset[i] + size;
+
+        debug_printf("r300: Texture miptree: Level %d "
+                "(%dx%dx%d px, pitch %d bytes)\n",
+                i, base->width[i], base->height[i], base->depth[i],
+                stride);
+        /* Save stride of first level to the texture. */
+        if (i == 0) {
+            tex->stride = stride;
+        }
+    }
+}
+
+/* Create a new texture. */
+static struct pipe_texture*
+    r300_texture_create(struct pipe_screen* screen,
+                        const struct pipe_texture* template)
+{
+    struct r300_texture* tex = CALLOC_STRUCT(r300_texture);
+
+    if (!tex) {
+        return NULL;
+    }
+
+    tex->tex = *template;
+    pipe_reference_init(&tex->tex.reference, 1);
+    tex->tex.screen = screen;
+
+    r300_setup_miptree(tex);
+
+    r300_setup_texture_state(tex, template->width[0], template->height[0],
+            template->width[0], template->last_level);
+
+    tex->buffer = screen->buffer_create(screen, 1024,
+                                        PIPE_BUFFER_USAGE_PIXEL,
+                                        tex->size);
+
+    if (!tex->buffer) {
+        FREE(tex);
+        return NULL;
+    }
+
+    return (struct pipe_texture*)tex;
+}
+
+static void r300_texture_destroy(struct pipe_texture* texture)
+{
+    struct r300_texture* tex = (struct r300_texture*)texture;
+
+    pipe_buffer_reference(&tex->buffer, NULL);
+
+    FREE(tex);
+}
+
+static struct pipe_surface* r300_get_tex_surface(struct pipe_screen* screen,
+                                                 struct pipe_texture* texture,
+                                                 unsigned face,
+                                                 unsigned level,
+                                                 unsigned zslice,
+                                                 unsigned flags)
+{
+    struct r300_texture* tex = (struct r300_texture*)texture;
+    struct pipe_surface* surface = CALLOC_STRUCT(pipe_surface);
+    unsigned offset;
+
+    /* XXX this is certainly dependent on tex target */
+    offset = tex->offset[level];
+
+    if (surface) {
+        pipe_reference_init(&surface->reference, 1);
+        pipe_texture_reference(&surface->texture, texture);
+        surface->format = texture->format;
+        surface->width = texture->width[level];
+        surface->height = texture->height[level];
+        surface->offset = offset;
+        surface->usage = flags;
+    }
+
+    return surface;
+}
+
+static void r300_tex_surface_destroy(struct pipe_surface* s)
+{
+    pipe_texture_reference(&s->texture, NULL);
+    FREE(s);
+}
+
+static struct pipe_texture*
+    r300_texture_blanket(struct pipe_screen* screen,
+                         const struct pipe_texture* base,
+                         const unsigned* stride,
+                         struct pipe_buffer* buffer)
+{
+    struct r300_texture* tex;
+
+    /* XXX we should start doing mips now... */
+    if (base->target != PIPE_TEXTURE_2D ||
+        base->last_level != 0 ||
+        base->depth[0] != 1) {
+        return NULL;
+    }
+
+    tex = CALLOC_STRUCT(r300_texture);
+    if (!tex) {
+        return NULL;
+    }
+
+    tex->tex = *base;
+    pipe_reference_init(&tex->tex.reference, 1);
+    tex->tex.screen = screen;
+
+    tex->stride = *stride;
+
+    /* XXX */
+    r300_setup_texture_state(tex, tex->tex.width[0], tex->tex.height[0],
+            tex->stride, 0);
+
+    pipe_buffer_reference(&tex->buffer, buffer);
+
+    return (struct pipe_texture*)tex;
+}
+
+void r300_init_screen_texture_functions(struct pipe_screen* screen)
+{
+    screen->texture_create = r300_texture_create;
+    screen->texture_destroy = r300_texture_destroy;
+    screen->get_tex_surface = r300_get_tex_surface;
+    screen->tex_surface_destroy = r300_tex_surface_destroy;
+    screen->texture_blanket = r300_texture_blanket;
+}
+
+boolean r300_get_texture_buffer(struct pipe_texture* texture,
+                                struct pipe_buffer** buffer,
+                                unsigned* stride)
+{
+    struct r300_texture* tex = (struct r300_texture*)texture;
+    if (!tex) {
+        return FALSE;
+    }
+
+    pipe_buffer_reference(buffer, tex->buffer);
+
+    if (stride) {
+        *stride = tex->stride;
+    }
+
+    return TRUE;
+}