From 7b733f4e2b20614d9f367186810c4fcac4aa820c Mon Sep 17 00:00:00 2001
From: Brendan King <Brendan.King@imgtec.com>
Date: Tue, 28 Nov 2017 16:27:38 +0000
Subject: [PATCH 25/50] gbm: add gbm_bo_blit

For the GBM DRI backend, gbm_bo_blit is a wrapper around blitImage in
the DRI Image extension.
---
 src/gbm/backends/dri/gbm_dri.c | 32 ++++++++++++++++++++++++++++++++
 src/gbm/main/gbm.c             | 28 ++++++++++++++++++++++++++++
 src/gbm/main/gbm.h             | 21 +++++++++++++++++++++
 src/gbm/main/gbmint.h          |  4 ++++
 4 files changed, 85 insertions(+)

diff --git a/src/gbm/backends/dri/gbm_dri.c b/src/gbm/backends/dri/gbm_dri.c
index b5634741554..ca865f4df9c 100644
--- a/src/gbm/backends/dri/gbm_dri.c
+++ b/src/gbm/backends/dri/gbm_dri.c
@@ -1334,6 +1334,37 @@ gbm_dri_surface_destroy(struct gbm_surface *_surf)
    free(surf);
 }
 
+static int
+gbm_dri_bo_blit(struct gbm_bo *_dst_bo, struct gbm_bo *_src_bo,
+                int dst_x0, int dst_y0, int dst_width, int dst_height,
+                int src_x0, int src_y0, int src_width, int src_height,
+                enum gbm_blit_flags flags)
+{
+   struct gbm_dri_device *dri = gbm_dri_device(_dst_bo->gbm);
+   struct gbm_dri_bo *dst_bo = gbm_dri_bo(_dst_bo);
+   struct gbm_dri_bo *src_bo = gbm_dri_bo(_src_bo);
+
+   if (!dri->image || dri->image->base.version < 9 || !dri->image->blitImage) {
+      errno = ENOSYS;
+      return 0;
+   }
+
+   mtx_lock(&dri->mutex);
+   if (!dri->context)
+      dri->context = dri->dri2->createNewContext(dri->screen, NULL,
+                                                 NULL, NULL);
+   assert(dri->context);
+   mtx_unlock(&dri->mutex);
+
+   /* GBM flags and DRI flags are the same, so just pass them on */
+   dri->image->blitImage(dri->context, dst_bo->image, src_bo->image,
+                         dst_x0, dst_y0, dst_width, dst_height,
+                         src_x0, src_y0, src_width, src_height,
+                         flags);
+
+   return 1;
+}
+
 static void
 dri_destroy(struct gbm_device *gbm)
 {
@@ -1383,6 +1414,7 @@ dri_device_create(int fd)
    dri->base.destroy = dri_destroy;
    dri->base.surface_create = gbm_dri_surface_create;
    dri->base.surface_destroy = gbm_dri_surface_destroy;
+   dri->base.bo_blit = gbm_dri_bo_blit;
 
    dri->base.name = "drm";
 
diff --git a/src/gbm/main/gbm.c b/src/gbm/main/gbm.c
index 954b3c35b0d..78de34286bd 100644
--- a/src/gbm/main/gbm.c
+++ b/src/gbm/main/gbm.c
@@ -741,3 +741,31 @@ gbm_format_get_name(uint32_t gbm_format, struct gbm_format_name_desc *desc)
 
    return desc->name;
 }
+
+/**
+ * Blit from one buffer object to another
+ *
+ * \param dst_bo The destination buffer object
+ * \param src_bo The source buffer object
+ * \param dst_x0 The X coordinate (top left origin) of the destination rectangle
+ * \param dst_y0 The Y coordinate (top left origin) of the destination rectangle
+ * \param dst_width The width of the destination rectangle
+ * \param dst_height The height of the destination rectangle
+ * \param src_x0 The X coordinate (top left origin) of the source rectangle
+ * \param src_y0 The Y coordinate (top left origin) of the source rectangle
+ * \param src_width The width of the source rectangle
+ * \param src_height The height of the source rectangle
+ * \param flags The flags for the blit
+ * \return 1 on success, 0 otherwise
+ */
+GBM_EXPORT int
+gbm_bo_blit(struct gbm_bo *dst_bo, struct gbm_bo *src_bo,
+            int dst_x0, int dst_y0, int dst_width, int dst_height,
+            int src_x0, int src_y0, int src_width, int src_height,
+            enum gbm_blit_flags flags)
+{
+   return dst_bo->gbm->bo_blit(dst_bo, src_bo,
+                               dst_x0, dst_y0, dst_width, dst_height,
+                               src_x0, src_y0, src_width, src_height,
+                               flags);
+}
diff --git a/src/gbm/main/gbm.h b/src/gbm/main/gbm.h
index 5801cd526a0..e754edd5654 100644
--- a/src/gbm/main/gbm.h
+++ b/src/gbm/main/gbm.h
@@ -246,6 +246,21 @@ enum gbm_bo_flags {
    GBM_BO_USE_PROTECTED = (1 << 5),
 };
 
+/**
+ * Flags to control the behaviour of a blit - these are passed to
+ * gbm_bo_blit().
+ */
+enum gbm_blit_flags {
+   /**
+    * Force blit execution in finite time
+    */
+   GBM_BLIT_FLAG_FLUSH  = 0x0001,
+   /**
+    * Flush, and wait for the blit to complete
+    */
+   GBM_BLIT_FLAG_FINISH = 0x0002
+};
+
 int
 gbm_device_get_fd(struct gbm_device *gbm);
 
@@ -422,6 +437,12 @@ gbm_surface_destroy(struct gbm_surface *surface);
 char *
 gbm_format_get_name(uint32_t gbm_format, struct gbm_format_name_desc *desc);
 
+int
+gbm_bo_blit(struct gbm_bo *dst_bo, struct gbm_bo *src_bo,
+            int dst_x0, int dst_y0, int dst_width, int dst_height,
+            int src_x0, int src_y0, int src_width, int src_height,
+            enum gbm_blit_flags flags);
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/src/gbm/main/gbmint.h b/src/gbm/main/gbmint.h
index 192577431e2..fb95954ab32 100644
--- a/src/gbm/main/gbmint.h
+++ b/src/gbm/main/gbmint.h
@@ -98,6 +98,10 @@ struct gbm_device {
                                   struct gbm_bo *bo);
    int (*surface_has_free_buffers)(struct gbm_surface *surface);
    void (*surface_destroy)(struct gbm_surface *surface);
+   int (*bo_blit)(struct gbm_bo *dst_bo, struct gbm_bo *src_bo,
+                  int dst_x0, int dst_y0, int dst_width, int dst_height,
+                  int src_x0, int src_y0, int src_width, int src_height,
+                  enum gbm_blit_flags flags);
 };
 
 /**
-- 
2.17.1