Mesa (master): st/mesa: first implementation of Map/UnmapRenderbuffer()
Brian Paul
brianp at kemper.freedesktop.org
Mon Nov 7 21:29:30 UTC 2011
Module: Mesa
Branch: master
Commit: 377eb5c30cfe94723cad214f12ca4ff9e5aee35e
URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=377eb5c30cfe94723cad214f12ca4ff9e5aee35e
Author: Brian Paul <brianp at vmware.com>
Date: Sat Nov 5 10:48:18 2011 -0600
st/mesa: first implementation of Map/UnmapRenderbuffer()
Untested, but also unused at this point.
---
src/mesa/state_tracker/st_cb_fbo.c | 59 ++++++++++++++++++++++++++++++++++++
src/mesa/state_tracker/st_cb_fbo.h | 2 +
2 files changed, 61 insertions(+), 0 deletions(-)
diff --git a/src/mesa/state_tracker/st_cb_fbo.c b/src/mesa/state_tracker/st_cb_fbo.c
index 6da65d7..e04cb44 100644
--- a/src/mesa/state_tracker/st_cb_fbo.c
+++ b/src/mesa/state_tracker/st_cb_fbo.c
@@ -630,6 +630,62 @@ st_ReadBuffer(struct gl_context *ctx, GLenum buffer)
}
+
+/**
+ * Called via ctx->Driver.MapRenderbuffer.
+ */
+static void
+st_MapRenderbuffer(struct gl_context *ctx,
+ struct gl_renderbuffer *rb,
+ GLuint x, GLuint y, GLuint w, GLuint h,
+ GLbitfield mode,
+ GLubyte **mapOut, GLint *rowStrideOut)
+{
+ struct st_context *st = st_context(ctx);
+ struct st_renderbuffer *strb = st_renderbuffer(rb);
+ struct pipe_context *pipe = st->pipe;
+ unsigned usage;
+
+ usage = 0x0;
+ if (mode & GL_MAP_READ_BIT)
+ usage |= PIPE_TRANSFER_READ;
+ if (mode & GL_MAP_WRITE_BIT)
+ usage |= PIPE_TRANSFER_WRITE;
+
+ strb->transfer = pipe_get_transfer(pipe,
+ strb->texture,
+ strb->rtt_level,
+ strb->rtt_face + strb->rtt_slice,
+ usage, x, y, w, h);
+ if (strb->transfer) {
+ *mapOut = pipe_transfer_map(pipe, strb->transfer);
+ *rowStrideOut = strb->transfer->stride;
+ }
+ else {
+ *mapOut = NULL;
+ *rowStrideOut = 0;
+ }
+}
+
+
+/**
+ * Called via ctx->Driver.UnmapRenderbuffer.
+ */
+static void
+st_UnmapRenderbuffer(struct gl_context *ctx,
+ struct gl_renderbuffer *rb)
+{
+ struct st_context *st = st_context(ctx);
+ struct st_renderbuffer *strb = st_renderbuffer(rb);
+ struct pipe_context *pipe = st->pipe;
+
+ pipe_transfer_unmap(pipe, strb->transfer);
+ pipe->transfer_destroy(pipe, strb->transfer);
+ strb->transfer = NULL;
+}
+
+
+
void st_init_fbo_functions(struct dd_function_table *functions)
{
#if FEATURE_EXT_framebuffer_object
@@ -647,6 +703,9 @@ void st_init_fbo_functions(struct dd_function_table *functions)
functions->DrawBuffers = st_DrawBuffers;
functions->ReadBuffer = st_ReadBuffer;
+
+ functions->MapRenderbuffer = st_MapRenderbuffer;
+ functions->UnmapRenderbuffer = st_UnmapRenderbuffer;
}
diff --git a/src/mesa/state_tracker/st_cb_fbo.h b/src/mesa/state_tracker/st_cb_fbo.h
index 1afa3fe..1be0173 100644
--- a/src/mesa/state_tracker/st_cb_fbo.h
+++ b/src/mesa/state_tracker/st_cb_fbo.h
@@ -51,6 +51,8 @@ struct st_renderbuffer
enum pipe_format format; /** preferred format, or PIPE_FORMAT_NONE */
GLboolean defined; /**< defined contents? */
+ struct pipe_transfer *transfer; /**< only used when mapping the resource */
+
/**
* Used only when hardware accumulation buffers are not supported.
*/
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