/*
 * Copyright 2011 Red Hat, Inc.
 *
 * 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 AUTHORS 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 "qxl_drv.h"
#include "qxl_object.h"

static int alloc_clips(struct qxl_device *qdev,
                       struct qxl_release *release,
                       unsigned num_clips,
                       struct qxl_bo **clips_bo)
{
        int size = sizeof(struct qxl_clip_rects) + sizeof(struct qxl_rect) * num_clips;

        return qxl_alloc_bo_reserved(qdev, release, size, clips_bo);
}

/* returns a pointer to the already allocated qxl_rect array inside
 * the qxl_clip_rects. This is *not* the same as the memory allocated
 * on the device, it is offset to qxl_clip_rects.chunk.data */
static struct qxl_rect *drawable_set_clipping(struct qxl_device *qdev,
                                              struct qxl_drawable *drawable,
                                              unsigned num_clips,
                                              struct qxl_bo *clips_bo)
{
        struct qxl_clip_rects *dev_clips;
        int ret;

        ret = qxl_bo_kmap(clips_bo, (void **)&dev_clips);
        if (ret) {
                return NULL;
        }
        dev_clips->num_rects = num_clips;
        dev_clips->chunk.next_chunk = 0;
        dev_clips->chunk.prev_chunk = 0;
        dev_clips->chunk.data_size = sizeof(struct qxl_rect) * num_clips;
        return (struct qxl_rect *)dev_clips->chunk.data;
}

static int
alloc_drawable(struct qxl_device *qdev, struct qxl_release **release)
{
        int ret;
        ret = qxl_alloc_release_reserved(qdev, sizeof(struct qxl_drawable),
                                         QXL_RELEASE_DRAWABLE, release,
                                         NULL);
        return ret;
}

static void
free_drawable(struct qxl_device *qdev, struct qxl_release *release)
{
        qxl_release_free(qdev, release);
}

/* release needs to be reserved at this point */
static int
make_drawable(struct qxl_device *qdev, int surface, uint8_t type,
              const struct qxl_rect *rect,
              struct qxl_release *release)
{
        struct qxl_drawable *drawable;
        int i;

        drawable = (struct qxl_drawable *)qxl_release_map(qdev, release);
        if (!drawable)
                return -ENOMEM;

        drawable->type = type;

        drawable->surface_id = surface;         /* Only primary for now */
        drawable->effect = QXL_EFFECT_OPAQUE;
        drawable->self_bitmap = 0;
        drawable->self_bitmap_area.top = 0;
        drawable->self_bitmap_area.left = 0;
        drawable->self_bitmap_area.bottom = 0;
        drawable->self_bitmap_area.right = 0;
        /* FIXME: add clipping */
        drawable->clip.type = SPICE_CLIP_TYPE_NONE;

        /*
         * surfaces_dest[i] should apparently be filled out with the
         * surfaces that we depend on, and surface_rects should be
         * filled with the rectangles of those surfaces that we
         * are going to use.
         */
        for (i = 0; i < 3; ++i)
                drawable->surfaces_dest[i] = -1;

        if (rect)
                drawable->bbox = *rect;

        drawable->mm_time = qdev->rom->mm_clock;
        qxl_release_unmap(qdev, release, &drawable->release_info);
        return 0;
}

static int alloc_palette_object(struct qxl_device *qdev,
                                struct qxl_release *release,
                                struct qxl_bo **palette_bo)
{
        return qxl_alloc_bo_reserved(qdev, release,
                                     sizeof(struct qxl_palette) + sizeof(uint32_t) * 2,
                                     palette_bo);
}

static int qxl_palette_create_1bit(struct qxl_bo *palette_bo,
                                   struct qxl_release *release,
                                   const struct qxl_fb_image *qxl_fb_image)
{
        const struct fb_image *fb_image = &qxl_fb_image->fb_image;
        uint32_t visual = qxl_fb_image->visual;
        const uint32_t *pseudo_palette = qxl_fb_image->pseudo_palette;
        struct qxl_palette *pal;
        int ret;
        uint32_t fgcolor, bgcolor;
        static uint64_t unique; /* we make no attempt to actually set this
                                 * correctly globaly, since that would require
                                 * tracking all of our palettes. */
        ret = qxl_bo_kmap(palette_bo, (void **)&pal);
        pal->num_ents = 2;
        pal->unique = unique++;
        if (visual == FB_VISUAL_TRUECOLOR || visual == FB_VISUAL_DIRECTCOLOR) {
                /* NB: this is the only used branch currently. */
                fgcolor = pseudo_palette[fb_image->fg_color];
                bgcolor = pseudo_palette[fb_image->bg_color];
        } else {
                fgcolor = fb_image->fg_color;
                bgcolor = fb_image->bg_color;
        }
        pal->ents[0] = bgcolor;
        pal->ents[1] = fgcolor;
        qxl_bo_kunmap(palette_bo);
        return 0;
}

void qxl_draw_opaque_fb(const struct qxl_fb_image *qxl_fb_image,
                        int stride /* filled in if 0 */)
{
        struct qxl_device *qdev = qxl_fb_image->qdev;
        struct qxl_drawable *drawable;
        struct qxl_rect rect;
        const struct fb_image *fb_image = &qxl_fb_image->fb_image;
        int x = fb_image->dx;
        int y = fb_image->dy;
        int width = fb_image->width;
        int height = fb_image->height;
        const char *src = fb_image->data;
        int depth = fb_image->depth;
        struct qxl_release *release;
        struct qxl_image *image;
        int ret;
        struct qxl_drm_image *dimage;
        struct qxl_bo *palette_bo = NULL;
        if (stride == 0)
                stride = depth * width / 8;

        ret = alloc_drawable(qdev, &release);
        if (ret)
                return;

        ret = qxl_image_alloc_objects(qdev, release,
                                      &dimage,
                                      height, stride);
        if (ret)
                goto out_free_drawable;

        if (depth == 1) {
                ret = alloc_palette_object(qdev, release, &palette_bo);
                if (ret)
                        goto out_free_image;
        }

        /* do a reservation run over all the objects we just allocated */
        ret = qxl_release_reserve_list(release, true);
        if (ret)
                goto out_free_palette;

        rect.left = x;
        rect.right = x + width;
        rect.top = y;
        rect.bottom = y + height;

        ret = make_drawable(qdev, 0, QXL_DRAW_COPY, &rect, release);
        if (ret) {
                qxl_release_backoff_reserve_list(release);
                goto out_free_palette;
        }

        ret = qxl_image_init(qdev, release, dimage,
                             (const uint8_t *)src, 0, 0,
                             width, height, depth, stride);
        if (ret) {
                qxl_release_backoff_reserve_list(release);
                qxl_release_free(qdev, release);
                return;
        }

        if (depth == 1) {
                void *ptr;
                ret = qxl_palette_create_1bit(palette_bo, release, qxl_fb_image);

                ptr = qxl_bo_kmap_atomic_page(qdev, dimage->bo, 0);
                image = ptr;
                image->u.bitmap.palette =
                        qxl_bo_physical_address(qdev, palette_bo, 0);
                qxl_bo_kunmap_atomic_page(qdev, dimage->bo, ptr);
        }

        drawable = (struct qxl_drawable *)qxl_release_map(qdev, release);

        drawable->u.copy.src_area.top = 0;
        drawable->u.copy.src_area.bottom = height;
        drawable->u.copy.src_area.left = 0;
        drawable->u.copy.src_area.right = width;

        drawable->u.copy.rop_descriptor = SPICE_ROPD_OP_PUT;
        drawable->u.copy.scale_mode = 0;
        drawable->u.copy.mask.flags = 0;
        drawable->u.copy.mask.pos.x = 0;
        drawable->u.copy.mask.pos.y = 0;
        drawable->u.copy.mask.bitmap = 0;

        drawable->u.copy.src_bitmap =
                qxl_bo_physical_address(qdev, dimage->bo, 0);
        qxl_release_unmap(qdev, release, &drawable->release_info);

        qxl_push_command_ring_release(qdev, release, QXL_CMD_DRAW, false);
        qxl_release_fence_buffer_objects(release);

out_free_palette:
        if (palette_bo)
                qxl_bo_unref(&palette_bo);
out_free_image:
        qxl_image_free_objects(qdev, dimage);
out_free_drawable:
        if (ret)
                free_drawable(qdev, release);
}

/* push a draw command using the given clipping rectangles as
 * the sources from the shadow framebuffer.
 *
 * Right now implementing with a single draw and a clip list. Clip
 * lists are known to be a problem performance wise, this can be solved
 * by treating them differently in the server.
 */
void qxl_draw_dirty_fb(struct qxl_device *qdev,
                       struct qxl_framebuffer *qxl_fb,
                       struct qxl_bo *bo,
                       unsigned flags, unsigned color,
                       struct drm_clip_rect *clips,
                       unsigned num_clips, int inc)
{
        /*
         * TODO: if flags & DRM_MODE_FB_DIRTY_ANNOTATE_FILL then we should
         * send a fill command instead, much cheaper.
         *
         * See include/drm/drm_mode.h
         */
        struct drm_clip_rect *clips_ptr;
        int i;
        int left, right, top, bottom;
        int width, height;
        struct qxl_drawable *drawable;
        struct qxl_rect drawable_rect;
        struct qxl_rect *rects;
        int stride = qxl_fb->base.pitches[0];
        /* depth is not actually interesting, we don't mask with it */
        int depth = qxl_fb->base.bits_per_pixel;
        uint8_t *surface_base;
        struct qxl_release *release;
        struct qxl_bo *clips_bo;
        struct qxl_drm_image *dimage;
        int ret;

        ret = alloc_drawable(qdev, &release);
        if (ret)
                return;

        left = clips->x1;
        right = clips->x2;
        top = clips->y1;
        bottom = clips->y2;

        /* skip the first clip rect */
        for (i = 1, clips_ptr = clips + inc;
             i < num_clips; i++, clips_ptr += inc) {
                left = min_t(int, left, (int)clips_ptr->x1);
                right = max_t(int, right, (int)clips_ptr->x2);
                top = min_t(int, top, (int)clips_ptr->y1);
                bottom = max_t(int, bottom, (int)clips_ptr->y2);
        }

        width = right - left;
        height = bottom - top;

        ret = alloc_clips(qdev, release, num_clips, &clips_bo);
        if (ret)
                goto out_free_drawable;

        ret = qxl_image_alloc_objects(qdev, release,
                                      &dimage,
                                      height, stride);
        if (ret)
                goto out_free_clips;

        /* do a reservation run over all the objects we just allocated */
        ret = qxl_release_reserve_list(release, true);
        if (ret)
                goto out_free_image;

        drawable_rect.left = left;
        drawable_rect.right = right;
        drawable_rect.top = top;
        drawable_rect.bottom = bottom;

        ret = make_drawable(qdev, 0, QXL_DRAW_COPY, &drawable_rect,
                            release);
        if (ret)
                goto out_release_backoff;

        ret = qxl_bo_kmap(bo, (void **)&surface_base);
        if (ret)
                goto out_release_backoff;


        ret = qxl_image_init(qdev, release, dimage, surface_base,
                             left, top, width, height, depth, stride);
        qxl_bo_kunmap(bo);
        if (ret)
                goto out_release_backoff;

        rects = drawable_set_clipping(qdev, drawable, num_clips, clips_bo);
        if (!rects)
                goto out_release_backoff;

        drawable = (struct qxl_drawable *)qxl_release_map(qdev, release);

        drawable->clip.type = SPICE_CLIP_TYPE_RECTS;
        drawable->clip.data = qxl_bo_physical_address(qdev,
                                                      clips_bo, 0);

        drawable->u.copy.src_area.top = 0;
        drawable->u.copy.src_area.bottom = height;
        drawable->u.copy.src_area.left = 0;
        drawable->u.copy.src_area.right = width;

        drawable->u.copy.rop_descriptor = SPICE_ROPD_OP_PUT;
        drawable->u.copy.scale_mode = 0;
        drawable->u.copy.mask.flags = 0;
        drawable->u.copy.mask.pos.x = 0;
        drawable->u.copy.mask.pos.y = 0;
        drawable->u.copy.mask.bitmap = 0;

        drawable->u.copy.src_bitmap = qxl_bo_physical_address(qdev, dimage->bo, 0);
        qxl_release_unmap(qdev, release, &drawable->release_info);

        clips_ptr = clips;
        for (i = 0; i < num_clips; i++, clips_ptr += inc) {
                rects[i].left   = clips_ptr->x1;
                rects[i].right  = clips_ptr->x2;
                rects[i].top    = clips_ptr->y1;
                rects[i].bottom = clips_ptr->y2;
        }
        qxl_bo_kunmap(clips_bo);

        qxl_push_command_ring_release(qdev, release, QXL_CMD_DRAW, false);
        qxl_release_fence_buffer_objects(release);

out_release_backoff:
        if (ret)
                qxl_release_backoff_reserve_list(release);
out_free_image:
        qxl_image_free_objects(qdev, dimage);
out_free_clips:
        qxl_bo_unref(&clips_bo);
out_free_drawable:
        /* only free drawable on error */
        if (ret)
                free_drawable(qdev, release);

}

void qxl_draw_copyarea(struct qxl_device *qdev,
                       u32 width, u32 height,
                       u32 sx, u32 sy,
                       u32 dx, u32 dy)
{
        struct qxl_drawable *drawable;
        struct qxl_rect rect;
        struct qxl_release *release;
        int ret;

        ret = alloc_drawable(qdev, &release);
        if (ret)
                return;

        /* do a reservation run over all the objects we just allocated */
        ret = qxl_release_reserve_list(release, true);
        if (ret)
                goto out_free_release;

        rect.left = dx;
        rect.top = dy;
        rect.right = dx + width;
        rect.bottom = dy + height;
        ret = make_drawable(qdev, 0, QXL_COPY_BITS, &rect, release);
        if (ret) {
                qxl_release_backoff_reserve_list(release);
                goto out_free_release;
        }

        drawable = (struct qxl_drawable *)qxl_release_map(qdev, release);
        drawable->u.copy_bits.src_pos.x = sx;
        drawable->u.copy_bits.src_pos.y = sy;
        qxl_release_unmap(qdev, release, &drawable->release_info);

        qxl_push_command_ring_release(qdev, release, QXL_CMD_DRAW, false);
        qxl_release_fence_buffer_objects(release);

out_free_release:
        if (ret)
                free_drawable(qdev, release);
}

void qxl_draw_fill(struct qxl_draw_fill *qxl_draw_fill_rec)
{
        struct qxl_device *qdev = qxl_draw_fill_rec->qdev;
        struct qxl_rect rect = qxl_draw_fill_rec->rect;
        uint32_t color = qxl_draw_fill_rec->color;
        uint16_t rop = qxl_draw_fill_rec->rop;
        struct qxl_drawable *drawable;
        struct qxl_release *release;
        int ret;

        ret = alloc_drawable(qdev, &release);
        if (ret)
                return;

        /* do a reservation run over all the objects we just allocated */
        ret = qxl_release_reserve_list(release, true);
        if (ret)
                goto out_free_release;

        ret = make_drawable(qdev, 0, QXL_DRAW_FILL, &rect, release);
        if (ret) {
                qxl_release_backoff_reserve_list(release);
                goto out_free_release;
        }

        drawable = (struct qxl_drawable *)qxl_release_map(qdev, release);
        drawable->u.fill.brush.type = SPICE_BRUSH_TYPE_SOLID;
        drawable->u.fill.brush.u.color = color;
        drawable->u.fill.rop_descriptor = rop;
        drawable->u.fill.mask.flags = 0;
        drawable->u.fill.mask.pos.x = 0;
        drawable->u.fill.mask.pos.y = 0;
        drawable->u.fill.mask.bitmap = 0;

        qxl_release_unmap(qdev, release, &drawable->release_info);

        qxl_push_command_ring_release(qdev, release, QXL_CMD_DRAW, false);
        qxl_release_fence_buffer_objects(release);

out_free_release:
        if (ret)
                free_drawable(qdev, release);
}