2009-12-10 09:25:33 +00:00
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/**************************************************************************
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*
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* Copyright 2009 Marek Olšák <maraeo@gmail.com>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sub license, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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* of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
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* IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
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* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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**************************************************************************/
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#ifndef U_BLITTER_H
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#define U_BLITTER_H
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#include "util/u_memory.h"
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#include "pipe/p_state.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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struct pipe_context;
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struct blitter_context
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{
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/* Private members, really. */
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void *saved_blend_state; /**< blend state */
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void *saved_dsa_state; /**< depth stencil alpha state */
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void *saved_rs_state; /**< rasterizer state */
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void *saved_fs, *saved_vs; /**< fragment shader, vertex shader */
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struct pipe_framebuffer_state saved_fb_state; /**< framebuffer state */
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2010-02-11 18:01:10 +00:00
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struct pipe_stencil_ref saved_stencil_ref; /**< stencil ref */
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2009-12-10 09:25:33 +00:00
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int saved_num_sampler_states;
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void *saved_sampler_states[32];
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int saved_num_textures;
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struct pipe_texture *saved_textures[32]; /* is 32 enough? */
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};
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/**
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* Create a blitter context.
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*/
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struct blitter_context *util_blitter_create(struct pipe_context *pipe);
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/**
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* Destroy a blitter context.
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*/
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void util_blitter_destroy(struct blitter_context *blitter);
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/*
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* These CSOs must be saved before any of the following functions is called:
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* - blend state
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* - depth stencil alpha state
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* - rasterizer state
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* - vertex shader
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* - fragment shader
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*/
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/**
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* Clear a specified set of currently bound buffers to specified values.
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*/
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void util_blitter_clear(struct blitter_context *blitter,
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unsigned width, unsigned height,
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unsigned num_cbufs,
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unsigned clear_buffers,
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const float *rgba,
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double depth, unsigned stencil);
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/**
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* Copy a block of pixels from one surface to another.
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*
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* You can copy from any color format to any other color format provided
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* the former can be sampled and the latter can be rendered to. Otherwise,
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* a software fallback path is taken and both surfaces must be of the same
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* format.
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*
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* The same holds for depth-stencil formats with the exception that stencil
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* cannot be copied unless you set ignore_stencil to FALSE. In that case,
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* a software fallback path is taken and both surfaces must be of the same
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* format.
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*
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* Use pipe_screen->is_format_supported to know your options.
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*
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* These states must be saved in the blitter in addition to the state objects
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* already required to be saved:
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* - framebuffer state
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* - fragment sampler states
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* - fragment sampler textures
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*/
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void util_blitter_copy(struct blitter_context *blitter,
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struct pipe_surface *dst,
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unsigned dstx, unsigned dsty,
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struct pipe_surface *src,
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unsigned srcx, unsigned srcy,
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unsigned width, unsigned height,
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boolean ignore_stencil);
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/**
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* Fill a region of a surface with a constant value.
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*
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* If the surface cannot be rendered to or it's a depth-stencil format,
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* a software fallback path is taken.
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*
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* These states must be saved in the blitter in addition to the state objects
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* already required to be saved:
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* - framebuffer state
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*/
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void util_blitter_fill(struct blitter_context *blitter,
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struct pipe_surface *dst,
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unsigned dstx, unsigned dsty,
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unsigned width, unsigned height,
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unsigned value);
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/**
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* Copy all pixels from one surface to another.
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*
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* The rules are the same as in util_blitter_copy with the addition that
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* surfaces must have the same size.
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*/
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static INLINE
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void util_blitter_copy_surface(struct blitter_context *blitter,
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struct pipe_surface *dst,
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struct pipe_surface *src,
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boolean ignore_stencil)
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{
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assert(dst->width == src->width && dst->height == src->height);
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util_blitter_copy(blitter, dst, 0, 0, src, 0, 0, src->width, src->height,
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ignore_stencil);
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}
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/* The functions below should be used to save currently bound constant state
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* objects inside a driver. The objects are automatically restored at the end
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* of the util_blitter_{clear, fill, copy, copy_surface} functions and then
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* forgotten.
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*
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* CSOs not listed here are not affected by util_blitter. */
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static INLINE
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void util_blitter_save_blend(struct blitter_context *blitter,
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void *state)
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{
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blitter->saved_blend_state = state;
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}
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static INLINE
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void util_blitter_save_depth_stencil_alpha(struct blitter_context *blitter,
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void *state)
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{
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blitter->saved_dsa_state = state;
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}
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2010-02-11 18:01:10 +00:00
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static INLINE
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void util_blitter_save_stencil_ref(struct blitter_context *blitter,
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const struct pipe_stencil_ref *state)
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{
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blitter->saved_stencil_ref = *state;
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}
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2009-12-10 09:25:33 +00:00
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static INLINE
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void util_blitter_save_rasterizer(struct blitter_context *blitter,
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void *state)
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{
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blitter->saved_rs_state = state;
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}
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static INLINE
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void util_blitter_save_fragment_shader(struct blitter_context *blitter,
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void *fs)
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{
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blitter->saved_fs = fs;
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}
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static INLINE
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void util_blitter_save_vertex_shader(struct blitter_context *blitter,
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void *vs)
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{
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blitter->saved_vs = vs;
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}
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static INLINE
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void util_blitter_save_framebuffer(struct blitter_context *blitter,
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struct pipe_framebuffer_state *state)
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{
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blitter->saved_fb_state = *state;
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}
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static INLINE
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void util_blitter_save_fragment_sampler_states(
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struct blitter_context *blitter,
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int num_sampler_states,
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void **sampler_states)
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{
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assert(num_sampler_states <= Elements(blitter->saved_sampler_states));
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blitter->saved_num_sampler_states = num_sampler_states;
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memcpy(blitter->saved_sampler_states, sampler_states,
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num_sampler_states * sizeof(void *));
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}
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static INLINE
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void util_blitter_save_fragment_sampler_textures(
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struct blitter_context *blitter,
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int num_textures,
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struct pipe_texture **textures)
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{
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assert(num_textures <= Elements(blitter->saved_textures));
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blitter->saved_num_textures = num_textures;
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memcpy(blitter->saved_textures, textures,
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num_textures * sizeof(struct pipe_texture *));
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}
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#ifdef __cplusplus
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}
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#endif
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#endif
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