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/**************************************************************************
*
* Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sub license, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial portions
* of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
* IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
**************************************************************************/
/**
* Framebuffer/renderbuffer functions.
*
* \author Brian Paul
*/
#include "main/imports.h"
#include "main/context.h"
#include "main/fbobject.h"
#include "main/framebuffer.h"
#include "main/renderbuffer.h"
#include "pipe/p_context.h"
#include "pipe/p_defines.h"
#include "pipe/p_inlines.h"
#include "pipe/p_screen.h"
#include "st_context.h"
#include "st_cb_fbo.h"
#include "st_cb_texture.h"
#include "st_format.h"
#include "st_public.h"
#include "st_texture.h"
/**
* Compute the renderbuffer's Red/Green/EtcBit fields from the pipe format.
*/
static int
init_renderbuffer_bits(struct st_renderbuffer *strb,
enum pipe_format pipeFormat)
{
struct pipe_format_info info;
if (!st_get_format_info( pipeFormat, &info )) {
assert( 0 );
}
strb->Base._ActualFormat = info.base_format;
strb->Base.RedBits = info.red_bits;
strb->Base.GreenBits = info.green_bits;
strb->Base.BlueBits = info.blue_bits;
strb->Base.AlphaBits = info.alpha_bits;
strb->Base.DepthBits = info.depth_bits;
strb->Base.StencilBits = info.stencil_bits;
strb->Base.DataType = st_format_datatype(pipeFormat);
return info.size;
}
/**
* gl_renderbuffer::AllocStorage()
* This is called to allocate the original drawing surface, and
* during window resize.
*/
static GLboolean
st_renderbuffer_alloc_storage(GLcontext * ctx, struct gl_renderbuffer *rb,
GLenum internalFormat,
GLuint width, GLuint height)
{
struct pipe_context *pipe = ctx->st->pipe;
struct st_renderbuffer *strb = st_renderbuffer(rb);
struct pipe_texture template;
unsigned surface_usage;
/* Free the old surface and texture
*/
pipe_surface_reference( &strb->surface, NULL );
pipe_texture_reference( &strb->texture, NULL );
memset(&template, 0, sizeof(template));
if (strb->format != PIPE_FORMAT_NONE) {
template.format = strb->format;
}
else {
template.format = st_choose_renderbuffer_format(pipe, internalFormat);
}
strb->Base.Width = width;
strb->Base.Height = height;
init_renderbuffer_bits(strb, template.format);
template.target = PIPE_TEXTURE_2D;
template.compressed = 0;
pf_get_block(template.format, &template.block);
template.width[0] = width;
template.height[0] = height;
template.depth[0] = 1;
template.last_level = 0;
template.nr_samples = rb->NumSamples;
if (pf_is_depth_stencil(template.format)) {
template.tex_usage = PIPE_TEXTURE_USAGE_DEPTH_STENCIL;
}
else {
template.tex_usage = (PIPE_TEXTURE_USAGE_DISPLAY_TARGET |
PIPE_TEXTURE_USAGE_RENDER_TARGET);
}
/* Probably need dedicated flags for surface usage too:
*/
surface_usage = (PIPE_BUFFER_USAGE_GPU_READ |
PIPE_BUFFER_USAGE_GPU_WRITE);
#if 0
PIPE_BUFFER_USAGE_CPU_READ |
PIPE_BUFFER_USAGE_CPU_WRITE);
#endif
strb->texture = pipe->screen->texture_create( pipe->screen,
&template );
/* Special path for accum buffers.
*
* Try a different surface format. Since accum buffers are s/w
* only for now, the surface pixel format doesn't really matter,
* only that the buffer is large enough.
*/
if (!strb->texture && template.format == DEFAULT_ACCUM_PIPE_FORMAT)
{
/* Actually, just setting this usage value should be sufficient
* to tell the driver to go ahead and allocate the buffer, even
* if HW doesn't support the format.
*/
template.tex_usage = 0;
surface_usage = (PIPE_BUFFER_USAGE_CPU_READ |
PIPE_BUFFER_USAGE_CPU_WRITE);
strb->texture = pipe->screen->texture_create( pipe->screen,
&template );
}
if (!strb->texture)
return FALSE;
strb->surface = pipe->screen->get_tex_surface( pipe->screen,
strb->texture,
0, 0, 0,
surface_usage );
assert(strb->surface->texture);
assert(strb->surface->format);
assert(strb->surface->width == width);
assert(strb->surface->height == height);
return strb->surface != NULL;
}
/**
* gl_renderbuffer::Delete()
*/
static void
st_renderbuffer_delete(struct gl_renderbuffer *rb)
{
struct st_renderbuffer *strb = st_renderbuffer(rb);
ASSERT(strb);
pipe_surface_reference(&strb->surface, NULL);
pipe_texture_reference(&strb->texture, NULL);
_mesa_free(strb);
}
/**
* gl_renderbuffer::GetPointer()
*/
static void *
null_get_pointer(GLcontext * ctx, struct gl_renderbuffer *rb,
GLint x, GLint y)
{
/* By returning NULL we force all software rendering to go through
* the span routines.
*/
#if 0
assert(0); /* Should never get called with softpipe */
#endif
return NULL;
}
/**
* Called via ctx->Driver.NewFramebuffer()
*/
static struct gl_framebuffer *
st_new_framebuffer(GLcontext *ctx, GLuint name)
{
/* XXX not sure we need to subclass gl_framebuffer for pipe */
return _mesa_new_framebuffer(ctx, name);
}
/**
* Called via ctx->Driver.NewRenderbuffer()
*/
static struct gl_renderbuffer *
st_new_renderbuffer(GLcontext *ctx, GLuint name)
{
struct st_renderbuffer *strb = ST_CALLOC_STRUCT(st_renderbuffer);
if (strb) {
_mesa_init_renderbuffer(&strb->Base, name);
strb->Base.Delete = st_renderbuffer_delete;
strb->Base.AllocStorage = st_renderbuffer_alloc_storage;
strb->Base.GetPointer = null_get_pointer;
strb->format = PIPE_FORMAT_NONE;
return &strb->Base;
}
return NULL;
}
/**
* Allocate a renderbuffer for a an on-screen window (not a user-created
* renderbuffer). The window system code determines the format.
*/
struct gl_renderbuffer *
st_new_renderbuffer_fb(enum pipe_format format, int samples)
{
struct st_renderbuffer *strb;
strb = ST_CALLOC_STRUCT(st_renderbuffer);
if (!strb) {
_mesa_error(NULL, GL_OUT_OF_MEMORY, "creating renderbuffer");
return NULL;
}
_mesa_init_renderbuffer(&strb->Base, 0);
strb->Base.ClassID = 0x4242; /* just a unique value */
strb->Base.NumSamples = samples;
strb->format = format;
switch (format) {
case PIPE_FORMAT_A8R8G8B8_UNORM:
case PIPE_FORMAT_B8G8R8A8_UNORM:
case PIPE_FORMAT_X8R8G8B8_UNORM:
case PIPE_FORMAT_B8G8R8X8_UNORM:
case PIPE_FORMAT_A1R5G5B5_UNORM:
case PIPE_FORMAT_A4R4G4B4_UNORM:
case PIPE_FORMAT_R5G6B5_UNORM:
strb->Base.InternalFormat = GL_RGBA;
strb->Base._BaseFormat = GL_RGBA;
break;
case PIPE_FORMAT_Z16_UNORM:
strb->Base.InternalFormat = GL_DEPTH_COMPONENT16;
strb->Base._BaseFormat = GL_DEPTH_COMPONENT;
break;
case PIPE_FORMAT_Z32_UNORM:
strb->Base.InternalFormat = GL_DEPTH_COMPONENT32;
strb->Base._BaseFormat = GL_DEPTH_COMPONENT;
break;
case PIPE_FORMAT_S8Z24_UNORM:
case PIPE_FORMAT_Z24S8_UNORM:
case PIPE_FORMAT_X8Z24_UNORM:
case PIPE_FORMAT_Z24X8_UNORM:
strb->Base.InternalFormat = GL_DEPTH24_STENCIL8_EXT;
strb->Base._BaseFormat = GL_DEPTH_STENCIL_EXT;
break;
case PIPE_FORMAT_S8_UNORM:
strb->Base.InternalFormat = GL_STENCIL_INDEX8_EXT;
strb->Base._BaseFormat = GL_STENCIL_INDEX;
break;
case DEFAULT_ACCUM_PIPE_FORMAT: /*PIPE_FORMAT_R16G16B16A16_SNORM*/
strb->Base.InternalFormat = GL_RGBA16;
strb->Base._BaseFormat = GL_RGBA;
break;
default:
_mesa_problem(NULL,
"Unexpected format in st_new_renderbuffer_fb");
return NULL;
}
/* st-specific methods */
strb->Base.Delete = st_renderbuffer_delete;
strb->Base.AllocStorage = st_renderbuffer_alloc_storage;
strb->Base.GetPointer = null_get_pointer;
/* surface is allocated in st_renderbuffer_alloc_storage() */
strb->surface = NULL;
return &strb->Base;
}
/**
* Called via ctx->Driver.BindFramebufferEXT().
*/
static void
st_bind_framebuffer(GLcontext *ctx, GLenum target,
struct gl_framebuffer *fb, struct gl_framebuffer *fbread)
{
}
/**
* Called by ctx->Driver.FramebufferRenderbuffer
*/
static void
st_framebuffer_renderbuffer(GLcontext *ctx,
struct gl_framebuffer *fb,
GLenum attachment,
struct gl_renderbuffer *rb)
{
/* XXX no need for derivation? */
_mesa_framebuffer_renderbuffer(ctx, fb, attachment, rb);
}
/**
* Called by ctx->Driver.RenderTexture
*/
static void
st_render_texture(GLcontext *ctx,
struct gl_framebuffer *fb,
struct gl_renderbuffer_attachment *att)
{
struct st_renderbuffer *strb;
struct gl_renderbuffer *rb;
struct pipe_texture *pt = st_get_texobj_texture(att->Texture);
struct st_texture_object *stObj;
const struct gl_texture_image *texImage =
att->Texture->Image[att->CubeMapFace][att->TextureLevel];
if (!pt)
return;
/* create new renderbuffer which wraps the texture image */
rb = st_new_renderbuffer(ctx, 0);
if (!rb) {
_mesa_error(ctx, GL_OUT_OF_MEMORY, "glFramebufferTexture()");
return;
}
_mesa_reference_renderbuffer(&att->Renderbuffer, rb);
assert(rb->RefCount == 1);
rb->AllocStorage = NULL; /* should not get called */
strb = st_renderbuffer(rb);
/* get the texture for the texture object */
stObj = st_texture_object(att->Texture);
/* point renderbuffer at texobject */
strb->rtt = stObj;
strb->rtt_level = att->TextureLevel;
strb->rtt_face = att->CubeMapFace;
strb->rtt_slice = att->Zoffset;
rb->Width = texImage->Width2;
rb->Height = texImage->Height2;
/*printf("***** render to texture level %d: %d x %d\n", att->TextureLevel, rb->Width, rb->Height);*/
/*printf("***** pipe texture %d x %d\n", pt->width[0], pt->height[0]);*/
pipe_texture_reference( &strb->texture, pt );
pipe_surface_reference(&strb->surface, NULL);
/* the new surface will be created during framebuffer validation */
init_renderbuffer_bits(strb, pt->format);
/*
printf("RENDER TO TEXTURE obj=%p pt=%p surf=%p %d x %d\n",
att->Texture, pt, strb->surface, rb->Width, rb->Height);
*/
/* Invalidate buffer state so that the pipe's framebuffer state
* gets updated.
* That's where the new renderbuffer (which we just created) gets
* passed to the pipe as a (color/depth) render target.
*/
st_invalidate_state(ctx, _NEW_BUFFERS);
}
/**
* Called via ctx->Driver.FinishRenderTexture.
*/
static void
st_finish_render_texture(GLcontext *ctx,
struct gl_renderbuffer_attachment *att)
{
struct st_renderbuffer *strb = st_renderbuffer(att->Renderbuffer);
if (!strb)
return;
st_flush( ctx->st, PIPE_FLUSH_RENDER_CACHE, NULL );
if (strb->surface)
pipe_surface_reference( &strb->surface, NULL );
strb->rtt = NULL;
/*
printf("FINISH RENDER TO TEXTURE surf=%p\n", strb->surface);
*/
_mesa_reference_renderbuffer(&att->Renderbuffer, NULL);
/* restore previous framebuffer state */
st_invalidate_state(ctx, _NEW_BUFFERS);
}
/**
* Check that the framebuffer configuration is valid in terms of what
* the driver can support.
*
* For Gallium we only supports combined Z+stencil, not separate buffers.
*/
static void
st_validate_framebuffer(GLcontext *ctx, struct gl_framebuffer *fb)
{
const struct gl_renderbuffer *depthRb =
fb->Attachment[BUFFER_DEPTH].Renderbuffer;
const struct gl_renderbuffer *stencilRb =
fb->Attachment[BUFFER_STENCIL].Renderbuffer;
if (stencilRb && depthRb && stencilRb != depthRb) {
fb->_Status = GL_FRAMEBUFFER_UNSUPPORTED_EXT;
}
}
void st_init_fbo_functions(struct dd_function_table *functions)
{
functions->NewFramebuffer = st_new_framebuffer;
functions->NewRenderbuffer = st_new_renderbuffer;
functions->BindFramebuffer = st_bind_framebuffer;
functions->FramebufferRenderbuffer = st_framebuffer_renderbuffer;
functions->RenderTexture = st_render_texture;
functions->FinishRenderTexture = st_finish_render_texture;
functions->ValidateFramebuffer = st_validate_framebuffer;
/* no longer needed by core Mesa, drivers handle resizes...
functions->ResizeBuffers = st_resize_buffers;
*/
}
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