haiku: fix Mesa build

1. The hgl.c file is a read-only file versus read-write.
Ref: src/gallium/state_trackers/hgl/hgl.c

2.  I've included the Haiku-specific patches I used to get a successful
build of Mesa 19.1.7 on Haiku using the meson/ninja build procedure.
Shows "[764/764] linking target ... libswpipe.so" at build completion.

v2:
Remove autotools files (Eric)

v3:
Update the patch

Reported-by: Ken Mays <[email protected]>
Tested-by: Ken Mays <[email protected]>
CC: [email protected]
Reviewed-by: Alexander von Gluck IV <[email protected]>

3 files changed, 18 insertions, 28 deletions

diff --git a/src/gallium/state_trackers/hgl/hgl.c b/src/gallium/state_trackers/hgl/hgl.c
index 57e0e7695c8..ac659a4f69a 100644
--- a/src/gallium/state_trackers/hgl/hgl.c
+++ b/src/gallium/state_trackers/hgl/hgl.c
@@ -44,7 +44,8 @@ hgl_st_context(struct st_context_iface *stctxi)
 
 
 // Perform a safe void to hgl_buffer cast
-static inline struct hgl_buffer*
+//static inline struct hgl_buffer*
+struct hgl_buffer*
 hgl_st_framebuffer(struct st_framebuffer_iface *stfbi)
 {
 	struct hgl_buffer* buffer;
@@ -62,7 +63,9 @@ hgl_st_framebuffer_flush_front(struct st_context_iface *stctxi,
 	CALLED();
 
 	//struct hgl_context* context = hgl_st_context(stctxi);
-	//struct hgl_buffer* buffer = hgl_st_context(stfbi);
+	// struct hgl_buffer* buffer = hgl_st_context(stfbi);
+	struct hgl_buffer* buffer = hgl_st_framebuffer(stfbi);
+	//buffer->surface
 
 	#if 0
 	struct stw_st_framebuffer *stwfb = stw_st_framebuffer(stfb);
@@ -281,7 +284,8 @@ hgl_create_st_manager(struct hgl_context* context)
 	//manager->display = dpy;
 	manager->screen = context->screen;
 	manager->get_param = hgl_st_manager_get_param;
-
+	manager->st_manager_private = (void *)context;
+	
 	return manager;
 }
 
diff --git a/src/gallium/state_trackers/hgl/hgl_context.h b/src/gallium/state_trackers/hgl/hgl_context.h
index 5acb2f08db1..c5995f1cd2b 100644
--- a/src/gallium/state_trackers/hgl/hgl_context.h
+++ b/src/gallium/state_trackers/hgl/hgl_context.h
@@ -39,6 +39,8 @@ struct hgl_buffer
 	unsigned mask;
 
 	struct pipe_screen* screen;
+	struct pipe_surface* surface;
+
 	enum pipe_texture_target target;
 	struct pipe_resource* textures[ST_ATTACHMENT_COUNT];
 
@@ -80,6 +82,8 @@ struct hgl_context
 	struct hgl_buffer* read;
 };
 
+// hgl_buffer from statetracker interface
+struct hgl_buffer* hgl_st_framebuffer(struct st_framebuffer_iface *stfbi);
 
 // hgl state_tracker api
 struct st_api* hgl_create_st_api(void);
diff --git a/src/gallium/targets/haiku-softpipe/GalliumContext.cpp b/src/gallium/targets/haiku-softpipe/GalliumContext.cpp
index 0356f65417c..d9be7904630 100644
--- a/src/gallium/targets/haiku-softpipe/GalliumContext.cpp
+++ b/src/gallium/targets/haiku-softpipe/GalliumContext.cpp
@@ -26,6 +26,7 @@
 #include "sw/hgl/hgl_sw_winsys.h"
 #include "util/u_atomic.h"
 #include "util/u_memory.h"
+#include "util/u_framebuffer.h"
 
 #include "target-helpers/inline_sw_helper.h"
 #include "target-helpers/inline_debug_helper.h"
@@ -332,36 +333,17 @@ GalliumContext::SwapBuffers(context_id contextID)
 		ERROR("%s: context not found\n", __func__);
 		return B_ERROR;
 	}
-
-	// TODO: Where did st_notify_swapbuffers go?
-	//st_notify_swapbuffers(context->draw->stfbi);
-
 	context->st->flush(context->st, ST_FLUSH_FRONT, NULL);
 
-	struct st_context *stContext = (struct st_context*)context->st;
-
-	unsigned nColorBuffers = stContext->state.framebuffer.nr_cbufs;
-	for (unsigned i = 0; i < nColorBuffers; i++) {
-		pipe_surface* surface = stContext->state.framebuffer.cbufs[i];
-		if (!surface) {
-			ERROR("%s: Color buffer %d invalid!\n", __func__, i);
-			continue;
-		}
-
-		TRACE("%s: Flushing color buffer #%d\n", __func__, i);
-
-		// We pass our destination bitmap to flush_fronbuffer which passes it
-		// to the private winsys display call.
-		fScreen->flush_frontbuffer(fScreen, surface->texture, 0, 0,
-			context->bitmap, NULL);
+	struct hgl_buffer* buffer = hgl_st_framebuffer(context->draw->stfbi);
+	pipe_surface* surface = buffer->surface;
+	if (!surface) {
+		ERROR("%s: Invalid drawable surface!\n", __func__);
+		return B_ERROR;
 	}
 
-	#if 0
-	// TODO... should we flush the z stencil buffer?
-	pipe_surface* zSurface = stContext->state.framebuffer.zsbuf;
-	fScreen->flush_frontbuffer(fScreen, zSurface->texture, 0, 0,
+	fScreen->flush_frontbuffer(fScreen, surface->texture, 0, 0,
 		context->bitmap, NULL);
-	#endif
 
 	return B_OK;
 }