st/mesa: add new driver function DrawBufferAllocate

Unlike some of the classic drivers the st was only using DrawBuffer()
to allocated some buffers on-demand. Creating a separate function
will allow us to call it from update_framebuffer() in the following
patch without regressing some of the older classic drivers.

Reviewed-by: Marek Olšák <[email protected]>

1 files changed, 4 insertions, 0 deletions

diff --git a/src/mesa/main/buffers.c b/src/mesa/main/buffers.c
index 7bb5725d085..ba970d87dad 100644
--- a/src/mesa/main/buffers.c
+++ b/src/mesa/main/buffers.c
@@ -306,6 +306,8 @@ draw_buffer(struct gl_context *ctx, struct gl_framebuffer *fb,
    if (fb == ctx->DrawBuffer) {
       if (ctx->Driver.DrawBuffer)
          ctx->Driver.DrawBuffer(ctx, buffer);
+      if (ctx->Driver.DrawBufferAllocate)
+         ctx->Driver.DrawBufferAllocate(ctx);
    }
 }
 
@@ -587,6 +589,8 @@ draw_buffers(struct gl_context *ctx, struct gl_framebuffer *fb, GLsizei n,
    if (fb == ctx->DrawBuffer) {
       if (ctx->Driver.DrawBuffer)
          ctx->Driver.DrawBuffer(ctx, n > 0 ? buffers[0] : GL_NONE);
+      if (ctx->Driver.DrawBufferAllocate)
+         ctx->Driver.DrawBufferAllocate(ctx);
    }
 }