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nouveau: Add implementation of MapRenderbuffer.

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Perhaps the easiest implementation, nouveau can directly map buffers
even if tiled, and uses separate surfaces for its texture
renderbuffers so we don't have to worry about that offset.

Reviewed-by: Brian Paul <brianp@vmware.com>
This commit is contained in:
Eric Anholt
2011-10-17 10:18:30 -07:00
parent 425b8d54b8
commit 4b8f4e7ce1
1 changed files with 46 additions and 0 deletions
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src/mesa/drivers/dri/nouveau/nouveau_fbo.c
+46
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@@ -133,6 +133,50 @@ nouveau_renderbuffer_new(struct gl_context *ctx, GLuint name)
return rb;
}
static void
nouveau_renderbuffer_map(struct gl_context *ctx,
struct gl_renderbuffer *rb,
GLuint x, GLuint y, GLuint w, GLuint h,
GLbitfield mode,
GLubyte **out_map,
GLint *out_stride)
{
struct nouveau_surface *s = &to_nouveau_renderbuffer(rb)->surface;
GLubyte *map;
int stride;
int flags = 0;
if (mode & GL_MAP_READ_BIT)
flags |= NOUVEAU_BO_RD;
if (mode & GL_MAP_WRITE_BIT)
flags |= NOUVEAU_BO_WR;
nouveau_bo_map(s->bo, flags);
map = s->bo->map;
stride = s->pitch;
if (rb->Name == 0) {
map += stride * (rb->Height - 1);
stride = -stride;
}
map += x * s->cpp;
map += (int)y * stride;
*out_map = map;
*out_stride = stride;
}
static void
nouveau_renderbuffer_unmap(struct gl_context *ctx,
struct gl_renderbuffer *rb)
{
struct nouveau_surface *s = &to_nouveau_renderbuffer(rb)->surface;
nouveau_bo_unmap(s->bo);
}
static GLboolean
nouveau_renderbuffer_dri_storage(struct gl_context *ctx, struct gl_renderbuffer *rb,
GLenum internalFormat,
@@ -268,6 +312,8 @@ nouveau_fbo_functions_init(struct dd_function_table *functions)
#if FEATURE_EXT_framebuffer_object
functions->NewFramebuffer = nouveau_framebuffer_new;
functions->NewRenderbuffer = nouveau_renderbuffer_new;
functions->MapRenderbuffer = nouveau_renderbuffer_map;
functions->UnmapRenderbuffer = nouveau_renderbuffer_unmap;
functions->BindFramebuffer = nouveau_bind_framebuffer;
functions->FramebufferRenderbuffer = nouveau_framebuffer_renderbuffer;
functions->RenderTexture = nouveau_render_texture;