fdo-mirrors/mesa
1
0
Fork 0
mirror of https://gitlab.freedesktop.org/mesa/mesa.git synced 2025-12-31 03:20:09 +01:00
Code Issues Projects Releases Packages Wiki Activity Actions 1

meta: Add infrastructure for saving/restoring the DrawBuffers state.

Browse source 
Sometimes we need to configure what draw buffers we render to, without
creating a new FBO.  This path will make that possible.

Cc: "10.2" <mesa-stable@lists.freedesktop.org>
Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Anuj Phogat <anuj.phogat@gmail.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
This commit is contained in:
Kenneth Graunke 2014-05-02 01:06:04 -07:00
parent e526ebf35c
commit c1c1cf5f92
2 changed files with 42 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

39
src/mesa/drivers/common/meta.c
View file

@ -392,6 +392,24 @@ _mesa_meta_init(struct gl_context *ctx)
ctx->Meta = CALLOC_STRUCT(gl_meta_state);
}
static GLenum
gl_buffer_index_to_drawbuffers_enum(gl_buffer_index bufindex)
{
assert(bufindex < BUFFER_COUNT);
if (bufindex >= BUFFER_COLOR0)
return GL_COLOR_ATTACHMENT0 + bufindex - BUFFER_COLOR0;
else if (bufindex == BUFFER_FRONT_LEFT)
return GL_FRONT_LEFT;
else if (bufindex == BUFFER_FRONT_RIGHT)
return GL_FRONT_RIGHT;
else if (bufindex == BUFFER_BACK_LEFT)
return GL_BACK_LEFT;
else if (bufindex == BUFFER_BACK_RIGHT)
return GL_BACK_RIGHT;
return GL_NONE;
}
/**
* Free context meta-op state.
@ -778,6 +796,23 @@ _mesa_meta_begin(struct gl_context *ctx, GLbitfield state)
_mesa_set_framebuffer_srgb(ctx, GL_FALSE);
}
if (state & MESA_META_DRAW_BUFFERS) {
int buf, real_color_buffers = 0;
memset(save->ColorDrawBuffers, 0, sizeof(save->ColorDrawBuffers));
for (buf = 0; buf < MAX_DRAW_BUFFERS; buf++) {
int buf_index = ctx->DrawBuffer->_ColorDrawBufferIndexes[buf];
if (buf_index == -1)
continue;
save->ColorDrawBuffers[buf] =
gl_buffer_index_to_drawbuffers_enum(buf_index);
if (++real_color_buffers >= ctx->DrawBuffer->_NumColorDrawBuffers)
break;
}
}
/* misc */
{
save->Lighting = ctx->Light.Enabled;
@ -1176,6 +1211,10 @@ _mesa_meta_end(struct gl_context *ctx)
ctx->CurrentRenderbuffer->Name != save->RenderbufferName)
_mesa_BindRenderbuffer(GL_RENDERBUFFER, save->RenderbufferName);
if (state & MESA_META_DRAW_BUFFERS) {
_mesa_DrawBuffers(MAX_DRAW_BUFFERS, save->ColorDrawBuffers);
}
ctx->Meta->SaveStackDepth--;
ctx->API = save->API;

3
src/mesa/drivers/common/meta.h
View file

@ -181,6 +181,9 @@ struct save_state
GLboolean TransformFeedbackNeedsResume;
GLuint DrawBufferName, ReadBufferName, RenderbufferName;
/** MESA_META_DRAW_BUFFERS */
GLenum ColorDrawBuffers[MAX_DRAW_BUFFERS];
};
/**