blender/intern/cycles/render/buffers.cpp
2012-06-09 18:56:12 +00:00

361 lines
8.1 KiB
C++

/*
* Copyright 2011, Blender Foundation.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include <stdlib.h>
#include "buffers.h"
#include "device.h"
#include "util_debug.h"
#include "util_foreach.h"
#include "util_hash.h"
#include "util_image.h"
#include "util_math.h"
#include "util_opengl.h"
#include "util_time.h"
#include "util_types.h"
CCL_NAMESPACE_BEGIN
/* Buffer Params */
BufferParams::BufferParams()
{
width = 0;
height = 0;
full_x = 0;
full_y = 0;
full_width = 0;
full_height = 0;
Pass::add(PASS_COMBINED, passes);
}
void BufferParams::get_offset_stride(int& offset, int& stride)
{
offset = -(full_x + full_y*width);
stride = width;
}
bool BufferParams::modified(const BufferParams& params)
{
return !(full_x == params.full_x
&& full_y == params.full_y
&& width == params.width
&& height == params.height
&& full_width == params.full_width
&& full_height == params.full_height
&& Pass::equals(passes, params.passes));
}
int BufferParams::get_passes_size()
{
int size = 0;
foreach(Pass& pass, passes)
size += pass.components;
return align_up(size, 4);
}
/* Render Buffers */
RenderBuffers::RenderBuffers(Device *device_)
{
device = device_;
}
RenderBuffers::~RenderBuffers()
{
device_free();
}
void RenderBuffers::device_free()
{
if(buffer.device_pointer) {
device->mem_free(buffer);
buffer.clear();
}
if(rng_state.device_pointer) {
device->mem_free(rng_state);
rng_state.clear();
}
}
void RenderBuffers::reset(Device *device, BufferParams& params_)
{
params = params_;
/* free existing buffers */
device_free();
/* allocate buffer */
buffer.resize(params.width*params.height*params.get_passes_size());
device->mem_alloc(buffer, MEM_READ_WRITE);
device->mem_zero(buffer);
/* allocate rng state */
rng_state.resize(params.width, params.height);
uint *init_state = rng_state.resize(params.width, params.height);
int x, y, width = params.width, height = params.height;
for(x = 0; x < width; x++)
for(y = 0; y < height; y++)
init_state[x + y*width] = hash_int_2d(params.full_x+x, params.full_y+y);
device->mem_alloc(rng_state, MEM_READ_WRITE);
device->mem_copy_to(rng_state);
}
bool RenderBuffers::copy_from_device()
{
if(!buffer.device_pointer)
return false;
device->mem_copy_from(buffer, 0, params.width, params.height, params.get_passes_size()*sizeof(float));
return true;
}
bool RenderBuffers::get_pass(PassType type, float exposure, int sample, int components, float *pixels)
{
int pass_offset = 0;
foreach(Pass& pass, params.passes) {
if(pass.type != type) {
pass_offset += pass.components;
continue;
}
float *in = (float*)buffer.data_pointer + pass_offset;
int pass_stride = params.get_passes_size();
float scale = (pass.filter)? 1.0f/(float)sample: 1.0f;
float scale_exposure = (pass.exposure)? scale*exposure: scale;
int size = params.width*params.height;
if(components == 1) {
assert(pass.components == components);
/* scalar */
if(type == PASS_DEPTH) {
for(int i = 0; i < size; i++, in += pass_stride, pixels++) {
float f = *in;
pixels[0] = (f == 0.0f)? 1e10f: f*scale_exposure;
}
}
else {
for(int i = 0; i < size; i++, in += pass_stride, pixels++) {
float f = *in;
pixels[0] = f*scale_exposure;
}
}
}
else if(components == 3) {
assert(pass.components == 4);
if(pass.divide_type != PASS_NONE) {
/* RGB lighting passes that need to divide out color */
pass_offset = 0;
foreach(Pass& color_pass, params.passes) {
if(color_pass.type == pass.divide_type)
break;
pass_offset += color_pass.components;
}
float *in_divide = (float*)buffer.data_pointer + pass_offset;
for(int i = 0; i < size; i++, in += pass_stride, in_divide += pass_stride, pixels += 3) {
float3 f = make_float3(in[0], in[1], in[2]);
float3 f_divide = make_float3(in_divide[0], in_divide[1], in_divide[2]);
f = safe_divide_color(f*exposure, f_divide);
pixels[0] = f.x;
pixels[1] = f.y;
pixels[2] = f.z;
}
}
else {
/* RGB/vector */
for(int i = 0; i < size; i++, in += pass_stride, pixels += 3) {
float3 f = make_float3(in[0], in[1], in[2]);
pixels[0] = f.x*scale_exposure;
pixels[1] = f.y*scale_exposure;
pixels[2] = f.z*scale_exposure;
}
}
}
else if(components == 4) {
assert(pass.components == components);
/* RGBA */
if(type == PASS_SHADOW) {
for(int i = 0; i < size; i++, in += pass_stride, pixels += 4) {
float4 f = make_float4(in[0], in[1], in[2], in[3]);
float invw = (f.w > 0.0f)? 1.0f/f.w: 1.0f;
pixels[0] = f.x*invw;
pixels[1] = f.y*invw;
pixels[2] = f.z*invw;
pixels[3] = 1.0f;
}
}
else if(type == PASS_MOTION) {
/* need to normalize by number of samples accumulated for motion */
pass_offset = 0;
foreach(Pass& color_pass, params.passes) {
if(color_pass.type == PASS_MOTION_WEIGHT)
break;
pass_offset += color_pass.components;
}
float *in_weight = (float*)buffer.data_pointer + pass_offset;
for(int i = 0; i < size; i++, in += pass_stride, in_weight += pass_stride, pixels += 4) {
float4 f = make_float4(in[0], in[1], in[2], in[3]);
float w = in_weight[0];
float invw = (w > 0.0f)? 1.0f/w: 0.0f;
pixels[0] = f.x*invw;
pixels[1] = f.y*invw;
pixels[2] = f.z*invw;
pixels[3] = f.w*invw;
}
}
else {
for(int i = 0; i < size; i++, in += pass_stride, pixels += 4) {
float4 f = make_float4(in[0], in[1], in[2], in[3]);
pixels[0] = f.x*scale_exposure;
pixels[1] = f.y*scale_exposure;
pixels[2] = f.z*scale_exposure;
/* clamp since alpha might be > 1.0 due to russian roulette */
pixels[3] = clamp(f.w*scale, 0.0f, 1.0f);
}
}
}
return true;
}
return false;
}
/* Display Buffer */
DisplayBuffer::DisplayBuffer(Device *device_)
{
device = device_;
draw_width = 0;
draw_height = 0;
transparent = true; /* todo: determine from background */
}
DisplayBuffer::~DisplayBuffer()
{
device_free();
}
void DisplayBuffer::device_free()
{
if(rgba.device_pointer) {
device->pixels_free(rgba);
rgba.clear();
}
}
void DisplayBuffer::reset(Device *device, BufferParams& params_)
{
draw_width = 0;
draw_height = 0;
params = params_;
/* free existing buffers */
device_free();
/* allocate display pixels */
rgba.resize(params.width, params.height);
device->pixels_alloc(rgba);
}
void DisplayBuffer::draw_set(int width, int height)
{
assert(width <= params.width && height <= params.height);
draw_width = width;
draw_height = height;
}
void DisplayBuffer::draw(Device *device)
{
if(draw_width != 0 && draw_height != 0) {
glPushMatrix();
glTranslatef(params.full_x, params.full_y, 0.0f);
device->draw_pixels(rgba, 0, draw_width, draw_height, 0, params.width, params.height, transparent);
glPopMatrix();
}
}
bool DisplayBuffer::draw_ready()
{
return (draw_width != 0 && draw_height != 0);
}
void DisplayBuffer::write(Device *device, const string& filename)
{
int w = draw_width;
int h = draw_height;
if(w == 0 || h == 0)
return;
/* read buffer from device */
device->pixels_copy_from(rgba, 0, w, h);
/* write image */
ImageOutput *out = ImageOutput::create(filename);
ImageSpec spec(w, h, 4, TypeDesc::UINT8);
int scanlinesize = w*4*sizeof(uchar);
out->open(filename, spec);
/* conversion for different top/bottom convention */
out->write_image(TypeDesc::UINT8,
(uchar*)rgba.data_pointer + (h-1)*scanlinesize,
AutoStride,
-scanlinesize,
AutoStride);
out->close();
delete out;
}
CCL_NAMESPACE_END