From 4b8f4e7ce17aeaa7fba1140897ab66f74d715b0a Mon Sep 17 00:00:00 2001 From: Eric Anholt Date: Mon, 17 Oct 2011 10:18:30 -0700 Subject: [PATCH] nouveau: Add implementation of MapRenderbuffer. 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 --- src/mesa/drivers/dri/nouveau/nouveau_fbo.c | 46 ++++++++++++++++++++++ 1 file changed, 46 insertions(+) diff --git a/src/mesa/drivers/dri/nouveau/nouveau_fbo.c b/src/mesa/drivers/dri/nouveau/nouveau_fbo.c index b36b5788781..d56e954e45a 100644 --- a/src/mesa/drivers/dri/nouveau/nouveau_fbo.c +++ b/src/mesa/drivers/dri/nouveau/nouveau_fbo.c @@ -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; -- 2.30.2