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|
/**************************************************************************
*
* Copyright 2006 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.
*
**************************************************************************/
#include "main/imports.h"
#include "main/mtypes.h"
#include "main/fbobject.h"
#include "main/framebuffer.h"
#include "main/renderbuffer.h"
#include "main/context.h"
#include "main/texformat.h"
#include "main/texrender.h"
#include "intel_context.h"
#include "intel_buffers.h"
#include "intel_depthstencil.h"
#include "intel_fbo.h"
#include "intel_mipmap_tree.h"
#include "intel_regions.h"
#include "intel_span.h"
#define FILE_DEBUG_FLAG DEBUG_FBO
/**
* Create a new framebuffer object.
*/
static struct gl_framebuffer *
intel_new_framebuffer(GLcontext * ctx, GLuint name)
{
/* Only drawable state in intel_framebuffer at this time, just use Mesa's
* class
*/
return _mesa_new_framebuffer(ctx, name);
}
static void
intel_delete_renderbuffer(struct gl_renderbuffer *rb)
{
GET_CURRENT_CONTEXT(ctx);
struct intel_context *intel = intel_context(ctx);
struct intel_renderbuffer *irb = intel_renderbuffer(rb);
ASSERT(irb);
if (irb->span_cache != NULL)
_mesa_free(irb->span_cache);
if (intel && irb->region) {
intel_region_release(&irb->region);
}
_mesa_free(irb);
}
/**
* Return a pointer to a specific pixel in a renderbuffer.
*/
static void *
intel_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.
*/
return NULL;
}
/**
* Called via glRenderbufferStorageEXT() to set the format and allocate
* storage for a user-created renderbuffer.
*/
static GLboolean
intel_alloc_renderbuffer_storage(GLcontext * ctx, struct gl_renderbuffer *rb,
GLenum internalFormat,
GLuint width, GLuint height)
{
struct intel_context *intel = intel_context(ctx);
struct intel_renderbuffer *irb = intel_renderbuffer(rb);
GLboolean softwareBuffer = GL_FALSE;
int cpp;
ASSERT(rb->Name != 0);
switch (internalFormat) {
case GL_R3_G3_B2:
case GL_RGB4:
case GL_RGB5:
rb->_ActualFormat = GL_RGB5;
rb->DataType = GL_UNSIGNED_BYTE;
rb->RedBits = 5;
rb->GreenBits = 6;
rb->BlueBits = 5;
cpp = 2;
break;
case GL_RGB:
case GL_RGB8:
case GL_RGB10:
case GL_RGB12:
case GL_RGB16:
rb->_ActualFormat = GL_RGB8;
rb->DataType = GL_UNSIGNED_BYTE;
rb->RedBits = 8;
rb->GreenBits = 8;
rb->BlueBits = 8;
rb->AlphaBits = 0;
cpp = 4;
break;
case GL_RGBA:
case GL_RGBA2:
case GL_RGBA4:
case GL_RGB5_A1:
case GL_RGBA8:
case GL_RGB10_A2:
case GL_RGBA12:
case GL_RGBA16:
rb->_ActualFormat = GL_RGBA8;
rb->DataType = GL_UNSIGNED_BYTE;
rb->RedBits = 8;
rb->GreenBits = 8;
rb->BlueBits = 8;
rb->AlphaBits = 8;
cpp = 4;
break;
case GL_STENCIL_INDEX:
case GL_STENCIL_INDEX1_EXT:
case GL_STENCIL_INDEX4_EXT:
case GL_STENCIL_INDEX8_EXT:
case GL_STENCIL_INDEX16_EXT:
/* alloc a depth+stencil buffer */
rb->_ActualFormat = GL_DEPTH24_STENCIL8_EXT;
rb->DataType = GL_UNSIGNED_INT_24_8_EXT;
rb->StencilBits = 8;
cpp = 4;
break;
case GL_DEPTH_COMPONENT16:
rb->_ActualFormat = GL_DEPTH_COMPONENT16;
rb->DataType = GL_UNSIGNED_SHORT;
rb->DepthBits = 16;
cpp = 2;
break;
case GL_DEPTH_COMPONENT:
case GL_DEPTH_COMPONENT24:
case GL_DEPTH_COMPONENT32:
rb->_ActualFormat = GL_DEPTH24_STENCIL8_EXT;
rb->DataType = GL_UNSIGNED_INT_24_8_EXT;
rb->DepthBits = 24;
cpp = 4;
break;
case GL_DEPTH_STENCIL_EXT:
case GL_DEPTH24_STENCIL8_EXT:
rb->_ActualFormat = GL_DEPTH24_STENCIL8_EXT;
rb->DataType = GL_UNSIGNED_INT_24_8_EXT;
rb->DepthBits = 24;
rb->StencilBits = 8;
cpp = 4;
break;
default:
_mesa_problem(ctx,
"Unexpected format in intel_alloc_renderbuffer_storage");
return GL_FALSE;
}
intelFlush(ctx);
/* free old region */
if (irb->region) {
intel_region_release(&irb->region);
}
/* allocate new memory region/renderbuffer */
if (softwareBuffer) {
return _mesa_soft_renderbuffer_storage(ctx, rb, internalFormat,
width, height);
}
else {
/* Choose a pitch to match hardware requirements:
*/
GLuint pitch = ((cpp * width + 63) & ~63) / cpp;
/* alloc hardware renderbuffer */
DBG("Allocating %d x %d Intel RBO (pitch %d)\n", width,
height, pitch);
irb->region = intel_region_alloc(intel, cpp, width, height, pitch);
if (!irb->region)
return GL_FALSE; /* out of memory? */
ASSERT(irb->region->buffer);
rb->Width = width;
rb->Height = height;
return GL_TRUE;
}
}
/**
* Called for each hardware renderbuffer when a _window_ is resized.
* Just update fields.
* Not used for user-created renderbuffers!
*/
static GLboolean
intel_alloc_window_storage(GLcontext * ctx, struct gl_renderbuffer *rb,
GLenum internalFormat, GLuint width, GLuint height)
{
ASSERT(rb->Name == 0);
rb->Width = width;
rb->Height = height;
rb->_ActualFormat = internalFormat;
return GL_TRUE;
}
static void
intel_resize_buffers(GLcontext *ctx, struct gl_framebuffer *fb,
GLuint width, GLuint height)
{
struct intel_framebuffer *intel_fb = (struct intel_framebuffer*)fb;
int i;
_mesa_resize_framebuffer(ctx, fb, width, height);
fb->Initialized = GL_TRUE; /* XXX remove someday */
if (fb->Name != 0) {
return;
}
/* Make sure all window system renderbuffers are up to date */
for (i = 0; i < 2; i++) {
struct gl_renderbuffer *rb = &intel_fb->color_rb[i]->Base;
/* only resize if size is changing */
if (rb && (rb->Width != width || rb->Height != height)) {
rb->AllocStorage(ctx, rb, rb->InternalFormat, width, height);
}
}
}
static GLboolean
intel_nop_alloc_storage(GLcontext * ctx, struct gl_renderbuffer *rb,
GLenum internalFormat, GLuint width, GLuint height)
{
_mesa_problem(ctx, "intel_op_alloc_storage should never be called.");
return GL_FALSE;
}
void
intel_renderbuffer_set_region(struct intel_renderbuffer *rb,
struct intel_region *region)
{
struct intel_region *old;
old = rb->region;
rb->region = NULL;
intel_region_reference(&rb->region, region);
intel_region_release(&old);
rb->pfPitch = region->pitch;
}
/**
* Create a new intel_renderbuffer which corresponds to an on-screen window,
* not a user-created renderbuffer.
*/
struct intel_renderbuffer *
intel_create_renderbuffer(GLenum intFormat)
{
GET_CURRENT_CONTEXT(ctx);
struct intel_renderbuffer *irb;
const GLuint name = 0;
irb = CALLOC_STRUCT(intel_renderbuffer);
if (!irb) {
_mesa_error(ctx, GL_OUT_OF_MEMORY, "creating renderbuffer");
return NULL;
}
_mesa_init_renderbuffer(&irb->Base, name);
irb->Base.ClassID = INTEL_RB_CLASS;
switch (intFormat) {
case GL_RGB5:
irb->Base._ActualFormat = GL_RGB5;
irb->Base._BaseFormat = GL_RGBA;
irb->Base.RedBits = 5;
irb->Base.GreenBits = 6;
irb->Base.BlueBits = 5;
irb->Base.DataType = GL_UNSIGNED_BYTE;
break;
case GL_RGBA8:
irb->Base._ActualFormat = GL_RGBA8;
irb->Base._BaseFormat = GL_RGBA;
irb->Base.RedBits = 8;
irb->Base.GreenBits = 8;
irb->Base.BlueBits = 8;
irb->Base.AlphaBits = 8;
irb->Base.DataType = GL_UNSIGNED_BYTE;
break;
case GL_STENCIL_INDEX8_EXT:
irb->Base._ActualFormat = GL_STENCIL_INDEX8_EXT;
irb->Base._BaseFormat = GL_STENCIL_INDEX;
irb->Base.StencilBits = 8;
irb->Base.DataType = GL_UNSIGNED_BYTE;
break;
case GL_DEPTH_COMPONENT16:
irb->Base._ActualFormat = GL_DEPTH_COMPONENT16;
irb->Base._BaseFormat = GL_DEPTH_COMPONENT;
irb->Base.DepthBits = 16;
irb->Base.DataType = GL_UNSIGNED_SHORT;
break;
case GL_DEPTH_COMPONENT24:
irb->Base._ActualFormat = GL_DEPTH24_STENCIL8_EXT;
irb->Base._BaseFormat = GL_DEPTH_COMPONENT;
irb->Base.DepthBits = 24;
irb->Base.DataType = GL_UNSIGNED_INT;
break;
case GL_DEPTH24_STENCIL8_EXT:
irb->Base._ActualFormat = GL_DEPTH24_STENCIL8_EXT;
irb->Base._BaseFormat = GL_DEPTH_STENCIL_EXT;
irb->Base.DepthBits = 24;
irb->Base.StencilBits = 8;
irb->Base.DataType = GL_UNSIGNED_INT_24_8_EXT;
break;
default:
_mesa_problem(NULL,
"Unexpected intFormat in intel_create_renderbuffer");
return NULL;
}
irb->Base.InternalFormat = intFormat;
/* intel-specific methods */
irb->Base.Delete = intel_delete_renderbuffer;
irb->Base.AllocStorage = intel_alloc_window_storage;
irb->Base.GetPointer = intel_get_pointer;
return irb;
}
/**
* Create a new renderbuffer object.
* Typically called via glBindRenderbufferEXT().
*/
static struct gl_renderbuffer *
intel_new_renderbuffer(GLcontext * ctx, GLuint name)
{
/*struct intel_context *intel = intel_context(ctx); */
struct intel_renderbuffer *irb;
irb = CALLOC_STRUCT(intel_renderbuffer);
if (!irb) {
_mesa_error(ctx, GL_OUT_OF_MEMORY, "creating renderbuffer");
return NULL;
}
_mesa_init_renderbuffer(&irb->Base, name);
irb->Base.ClassID = INTEL_RB_CLASS;
/* intel-specific methods */
irb->Base.Delete = intel_delete_renderbuffer;
irb->Base.AllocStorage = intel_alloc_renderbuffer_storage;
irb->Base.GetPointer = intel_get_pointer;
/* span routines set in alloc_storage function */
return &irb->Base;
}
/**
* Called via glBindFramebufferEXT().
*/
static void
intel_bind_framebuffer(GLcontext * ctx, GLenum target,
struct gl_framebuffer *fb, struct gl_framebuffer *fbread)
{
if (target == GL_FRAMEBUFFER_EXT || target == GL_DRAW_FRAMEBUFFER_EXT) {
intel_draw_buffer(ctx, fb);
}
else {
/* don't need to do anything if target == GL_READ_FRAMEBUFFER_EXT */
}
}
/**
* Called via glFramebufferRenderbufferEXT().
*/
static void
intel_framebuffer_renderbuffer(GLcontext * ctx,
struct gl_framebuffer *fb,
GLenum attachment, struct gl_renderbuffer *rb)
{
DBG("Intel FramebufferRenderbuffer %u %u\n", fb->Name, rb ? rb->Name : 0);
intelFlush(ctx);
_mesa_framebuffer_renderbuffer(ctx, fb, attachment, rb);
intel_draw_buffer(ctx, fb);
}
static GLboolean
intel_update_wrapper(GLcontext *ctx, struct intel_renderbuffer *irb,
struct gl_texture_image *texImage)
{
if (texImage->TexFormat == &_mesa_texformat_argb8888) {
irb->Base._ActualFormat = GL_RGBA8;
irb->Base._BaseFormat = GL_RGBA;
irb->Base.DataType = GL_UNSIGNED_BYTE;
DBG("Render to RGBA8 texture OK\n");
}
else if (texImage->TexFormat == &_mesa_texformat_rgb565) {
irb->Base._ActualFormat = GL_RGB5;
irb->Base._BaseFormat = GL_RGB;
irb->Base.DataType = GL_UNSIGNED_SHORT;
DBG("Render to RGB5 texture OK\n");
}
else if (texImage->TexFormat == &_mesa_texformat_z16) {
irb->Base._ActualFormat = GL_DEPTH_COMPONENT16;
irb->Base._BaseFormat = GL_DEPTH_COMPONENT;
irb->Base.DataType = GL_UNSIGNED_SHORT;
DBG("Render to DEPTH16 texture OK\n");
}
else if (texImage->TexFormat == &_mesa_texformat_s8_z24) {
irb->Base._ActualFormat = GL_DEPTH24_STENCIL8_EXT;
irb->Base._BaseFormat = GL_DEPTH_STENCIL_EXT;
irb->Base.DataType = GL_UNSIGNED_INT_24_8_EXT;
DBG("Render to DEPTH_STENCIL texture OK\n");
}
else {
DBG("Render to texture BAD FORMAT %d\n",
texImage->TexFormat->MesaFormat);
return GL_FALSE;
}
irb->Base.InternalFormat = irb->Base._ActualFormat;
irb->Base.Width = texImage->Width;
irb->Base.Height = texImage->Height;
irb->Base.RedBits = texImage->TexFormat->RedBits;
irb->Base.GreenBits = texImage->TexFormat->GreenBits;
irb->Base.BlueBits = texImage->TexFormat->BlueBits;
irb->Base.AlphaBits = texImage->TexFormat->AlphaBits;
irb->Base.DepthBits = texImage->TexFormat->DepthBits;
irb->Base.Delete = intel_delete_renderbuffer;
irb->Base.AllocStorage = intel_nop_alloc_storage;
irb->RenderToTexture = GL_TRUE;
return GL_TRUE;
}
/**
* When glFramebufferTexture[123]D is called this function sets up the
* gl_renderbuffer wrapper around the texture image.
* This will have the region info needed for hardware rendering.
*/
static struct intel_renderbuffer *
intel_wrap_texture(GLcontext * ctx, struct gl_texture_image *texImage)
{
const GLuint name = ~0; /* not significant, but distinct for debugging */
struct intel_renderbuffer *irb;
/* make an intel_renderbuffer to wrap the texture image */
irb = CALLOC_STRUCT(intel_renderbuffer);
if (!irb) {
_mesa_error(ctx, GL_OUT_OF_MEMORY, "glFramebufferTexture");
return NULL;
}
_mesa_init_renderbuffer(&irb->Base, name);
irb->Base.ClassID = INTEL_RB_CLASS;
if (!intel_update_wrapper(ctx, irb, texImage)) {
_mesa_free(irb);
return NULL;
}
return irb;
}
/**
* Called by glFramebufferTexture[123]DEXT() (and other places) to
* prepare for rendering into texture memory. This might be called
* many times to choose different texture levels, cube faces, etc
* before intel_finish_render_texture() is ever called.
*/
static void
intel_render_texture(GLcontext * ctx,
struct gl_framebuffer *fb,
struct gl_renderbuffer_attachment *att)
{
struct gl_texture_image *newImage
= att->Texture->Image[att->CubeMapFace][att->TextureLevel];
struct intel_renderbuffer *irb = intel_renderbuffer(att->Renderbuffer);
struct intel_texture_image *intel_image;
GLuint imageOffset;
(void) fb;
ASSERT(newImage);
if (newImage->Border != 0) {
/* Fallback on drawing to a texture with a border, which won't have a
* miptree.
*/
_mesa_reference_renderbuffer(&att->Renderbuffer, NULL);
_mesa_render_texture(ctx, fb, att);
return;
} else if (!irb) {
irb = intel_wrap_texture(ctx, newImage);
if (irb) {
/* bind the wrapper to the attachment point */
_mesa_reference_renderbuffer(&att->Renderbuffer, &irb->Base);
}
else {
/* fallback to software rendering */
_mesa_render_texture(ctx, fb, att);
return;
}
} if (!intel_update_wrapper(ctx, irb, newImage)) {
_mesa_reference_renderbuffer(&att->Renderbuffer, NULL);
_mesa_render_texture(ctx, fb, att);
return;
}
DBG("Begin render texture tid %x tex=%u w=%d h=%d refcount=%d\n",
_glthread_GetID(),
att->Texture->Name, newImage->Width, newImage->Height,
irb->Base.RefCount);
/* point the renderbufer's region to the texture image region */
intel_image = intel_texture_image(newImage);
if (irb->region != intel_image->mt->region) {
if (irb->region)
intel_region_release(&irb->region);
intel_region_reference(&irb->region, intel_image->mt->region);
}
/* compute offset of the particular 2D image within the texture region */
imageOffset = intel_miptree_image_offset(intel_image->mt,
att->CubeMapFace,
att->TextureLevel);
if (att->Texture->Target == GL_TEXTURE_3D) {
const GLuint *offsets = intel_miptree_depth_offsets(intel_image->mt,
att->TextureLevel);
imageOffset += offsets[att->Zoffset];
}
/* store that offset in the region */
intel_image->mt->region->draw_offset = imageOffset;
/* update drawing region, etc */
intel_draw_buffer(ctx, fb);
}
/**
* Called by Mesa when rendering to a texture is done.
*/
static void
intel_finish_render_texture(GLcontext * ctx,
struct gl_renderbuffer_attachment *att)
{
struct intel_renderbuffer *irb = intel_renderbuffer(att->Renderbuffer);
DBG("End render texture (tid %x) tex %u\n", _glthread_GetID(), att->Texture->Name);
if (irb) {
/* just release the region */
intel_region_release(&irb->region);
}
else if (att->Renderbuffer) {
/* software fallback */
_mesa_finish_render_texture(ctx, att);
/* XXX FBO: Need to unmap the buffer (or in intelSpanRenderStart???) */
}
}
/**
* Do additional "completeness" testing of a framebuffer object.
*/
static void
intel_validate_framebuffer(GLcontext *ctx, struct gl_framebuffer *fb)
{
const struct intel_renderbuffer *depthRb =
intel_get_renderbuffer(fb, BUFFER_DEPTH);
const struct intel_renderbuffer *stencilRb =
intel_get_renderbuffer(fb, BUFFER_STENCIL);
if (stencilRb && stencilRb != depthRb) {
/* we only support combined depth/stencil buffers, not separate
* stencil buffers.
*/
fb->_Status = GL_FRAMEBUFFER_UNSUPPORTED_EXT;
}
}
/**
* Do one-time context initializations related to GL_EXT_framebuffer_object.
* Hook in device driver functions.
*/
void
intel_fbo_init(struct intel_context *intel)
{
intel->ctx.Driver.NewFramebuffer = intel_new_framebuffer;
intel->ctx.Driver.NewRenderbuffer = intel_new_renderbuffer;
intel->ctx.Driver.BindFramebuffer = intel_bind_framebuffer;
intel->ctx.Driver.FramebufferRenderbuffer = intel_framebuffer_renderbuffer;
intel->ctx.Driver.RenderTexture = intel_render_texture;
intel->ctx.Driver.FinishRenderTexture = intel_finish_render_texture;
intel->ctx.Driver.ResizeBuffers = intel_resize_buffers;
intel->ctx.Driver.ValidateFramebuffer = intel_validate_framebuffer;
}
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