Mesa (master): egl/android: Add support for YV12 pixel format (v2)

[Chad Versace]

Module: Mesa
Branch: master
Commit: 3723e9826f3662ed8ff160f8f24a9b7ee2617db9
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=3723e9826f3662ed8ff160f8f24a9b7ee2617db9

Author: Tomasz Figa <tfiga at chromium.org>
Date:   Tue Aug  2 20:07:54 2016 +0900

egl/android: Add support for YV12 pixel format (v2)

This patch adds support for YV12 pixel format to the Android platform
backend. Only creating EGL images is supported, it is not added to the
list of available visuals.

v2: Use const array defined just for YV12 instead of trying to be overly
    generic.

Signed-off-by: Tomasz Figa <tfiga at chromium.org>
Signed-off-by: Kalyan Kondapally <kalyan.kondapally at intel.com>
Tested-by: Rob Herring <rob at kernel.org>
Reviewed-by: Chad Versace <chad at kiwitree.net>
Change-Id: I4aeb2d67a95c5cdd10b530c549b23146c8f0b983

---

 src/egl/drivers/dri2/platform_android.c | 56 +++++++++++++++++++++++++++++----
 1 file changed, 50 insertions(+), 6 deletions(-)

diff --git a/src/egl/drivers/dri2/platform_android.c b/src/egl/drivers/dri2/platform_android.c
index 596833e..25ceb0e 100644
--- a/src/egl/drivers/dri2/platform_android.c
+++ b/src/egl/drivers/dri2/platform_android.c
@@ -40,6 +40,8 @@
 #include "egl_dri2_fallbacks.h"
 #include "gralloc_drm.h"
 
+#define ALIGN(val, align)	(((val) + (align) - 1) & ~((align) - 1))
+
 static int
 get_format_bpp(int native)
 {
@@ -57,6 +59,9 @@ get_format_bpp(int native)
    case HAL_PIXEL_FORMAT_RGB_565:
       bpp = 2;
       break;
+   case HAL_PIXEL_FORMAT_YV12:
+      bpp = 1;
+      break;
    default:
       bpp = 0;
       break;
@@ -73,6 +78,7 @@ static int get_fourcc(int native)
    case HAL_PIXEL_FORMAT_BGRA_8888: return __DRI_IMAGE_FOURCC_ARGB8888;
    case HAL_PIXEL_FORMAT_RGBA_8888: return __DRI_IMAGE_FOURCC_ABGR8888;
    case HAL_PIXEL_FORMAT_RGBX_8888: return __DRI_IMAGE_FOURCC_XBGR8888;
+   case HAL_PIXEL_FORMAT_YV12:      return __DRI_IMAGE_FOURCC_YVU420;
    default:
       _eglLog(_EGL_WARNING, "unsupported native buffer format 0x%x", native);
    }
@@ -483,22 +489,60 @@ static _EGLImage *
 droid_create_image_from_prime_fd(_EGLDisplay *disp, _EGLContext *ctx,
                                  struct ANativeWindowBuffer *buf, int fd)
 {
+   unsigned int offsets[3] = { 0, 0, 0 };
+   unsigned int pitches[3] = { 0, 0, 0 };
+
    const int fourcc = get_fourcc(buf->format);
-   const int pitch = buf->stride * get_format_bpp(buf->format);
+   if (fourcc == -1) {
+      _eglError(EGL_BAD_PARAMETER, "eglCreateEGLImageKHR");
+      return NULL;
+   }
 
-   const EGLint attr_list[14] = {
+   pitches[0] = buf->stride * get_format_bpp(buf->format);
+   if (pitches[0] == 0) {
+      _eglError(EGL_BAD_PARAMETER, "eglCreateEGLImageKHR");
+      return NULL;
+   }
+
+   switch (buf->format) {
+   case HAL_PIXEL_FORMAT_YV12:
+      /* Y plane is assumed to be at offset 0. */
+      /* Cr plane is located after Y plane */
+      offsets[1] = offsets[0] + pitches[0] * buf->height;
+      pitches[1] = ALIGN(pitches[0] / 2, 16);
+      /* Cb plane is located after Cr plane */
+      offsets[2] = offsets[1] + pitches[1] * buf->height / 2;
+      pitches[2] = pitches[1];
+
+      const EGLint attr_list_yv12[] = {
+         EGL_WIDTH, buf->width,
+         EGL_HEIGHT, buf->height,
+         EGL_LINUX_DRM_FOURCC_EXT, fourcc,
+         EGL_DMA_BUF_PLANE0_FD_EXT, fd,
+         EGL_DMA_BUF_PLANE0_PITCH_EXT, pitches[0],
+         EGL_DMA_BUF_PLANE0_OFFSET_EXT, offsets[0],
+         EGL_DMA_BUF_PLANE1_FD_EXT, fd,
+         EGL_DMA_BUF_PLANE1_PITCH_EXT, pitches[1],
+         EGL_DMA_BUF_PLANE1_OFFSET_EXT, offsets[1],
+         EGL_DMA_BUF_PLANE2_FD_EXT, fd,
+         EGL_DMA_BUF_PLANE2_PITCH_EXT, pitches[2],
+         EGL_DMA_BUF_PLANE2_OFFSET_EXT, offsets[2],
+         EGL_NONE, 0
+      };
+
+      return dri2_create_image_dma_buf(disp, ctx, NULL, attr_list_yv12);
+   }
+
+   const EGLint attr_list[] = {
       EGL_WIDTH, buf->width,
       EGL_HEIGHT, buf->height,
       EGL_LINUX_DRM_FOURCC_EXT, fourcc,
       EGL_DMA_BUF_PLANE0_FD_EXT, fd,
-      EGL_DMA_BUF_PLANE0_PITCH_EXT, pitch,
+      EGL_DMA_BUF_PLANE0_PITCH_EXT, pitches[0],
       EGL_DMA_BUF_PLANE0_OFFSET_EXT, 0,
       EGL_NONE, 0
    };
 
-   if (fourcc == -1 || pitch == 0)
-      return NULL;
-
    return dri2_create_image_dma_buf(disp, ctx, NULL, attr_list);
 }