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BaseSoftRenderSurface.cpp
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BaseSoftRenderSurface.cpp
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/*
BaseSoftRenderSurface.cpp : Abstract BaseSoftRenderSurface source file
Copyright (C) 2003 The Pentagram Team
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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "pent_include.h"
#include <SDL.h>
#include "SoftRenderSurface.h"
#include "Palette.h"
#include "Texture.h"
using Pentagram::Rect;
///////////////////////////
// //
// BaseSoftRenderSurface //
// //
///////////////////////////
//
// BaseSoftRenderSurface::BaseSoftRenderSurface(SDL_Renderer *r,
// int width, int height, int bpp)
//
// Desc: Constructor for BaseSoftRenderSurface from a SDL_Renderer and SDL_Texture
//
BaseSoftRenderSurface::BaseSoftRenderSurface(SDL_Renderer *r, SDL_Texture *t,
int w, int h, int bpp) :
pixels(0), pixels00(0), zbuffer(0), zbuffer00(0),
bytes_per_pixel(0), bits_per_pixel(0), format_type(0),
ox(0), oy(0), width(0), height(0), pitch(0), zpitch(0),
flipped(false), clip_window(0,0,0,0), lock_count(0),
sdl_rend(r), sdl_tex(t)
{
sdl_surf = SDL_CreateRGBSurface(0, width = w, height = h, bpp, 0, 0, 0, 0);
clip_window.ResizeAbs(width = sdl_surf->w, height = sdl_surf->h);
pitch = sdl_surf->pitch;
bits_per_pixel = sdl_surf->format->BitsPerPixel;
bytes_per_pixel = sdl_surf->format->BytesPerPixel;
RenderSurface::format.s_bpp = bits_per_pixel;
RenderSurface::format.s_bytes_per_pixel = bytes_per_pixel;
RenderSurface::format.r_loss = sdl_surf->format->Rloss;
RenderSurface::format.g_loss = sdl_surf->format->Gloss;
RenderSurface::format.b_loss = sdl_surf->format->Bloss;
RenderSurface::format.a_loss = sdl_surf->format->Aloss;
RenderSurface::format.r_loss16 = format.r_loss+8;
RenderSurface::format.g_loss16 = format.g_loss+8;
RenderSurface::format.b_loss16 = format.b_loss+8;
RenderSurface::format.a_loss16 = format.a_loss+8;
RenderSurface::format.r_shift = sdl_surf->format->Rshift;
RenderSurface::format.g_shift = sdl_surf->format->Gshift;
RenderSurface::format.b_shift = sdl_surf->format->Bshift;
RenderSurface::format.a_shift = sdl_surf->format->Ashift;
RenderSurface::format.r_mask = sdl_surf->format->Rmask;
RenderSurface::format.g_mask = sdl_surf->format->Gmask;
RenderSurface::format.b_mask = sdl_surf->format->Bmask;
RenderSurface::format.a_mask = sdl_surf->format->Amask;
SetPixelsPointer();
// Trickery to get the alpha channel
if (format.a_mask == 0 && bytes_per_pixel==4)
{
uint32 mask = ~(format.r_mask|format.g_mask|format.b_mask);
// Using all bits????
if (!mask) return;
// Check the mask to make sure that it's 'sane'
int i;
int last = 0;
int first = 0;
int zero = 32;
for (i = 0; i < 32; i++)
{
if ((1<<i) & mask)
{
last = first = i;
break;
}
}
for (; i < 32; i++)
{
if ((1<<i) & mask)
last = i;
else if (i < zero)
zero = i;
}
// something screwy going on
if (zero < last) return;
// Set it
format.a_shift = first;
format.a_loss = 8-(last+1-first);
format.a_loss16 = format.a_loss+8;
format.a_mask = mask;
}
}
//
// BaseSoftRenderSurface::BaseSoftRenderSurface(int w, int h, int bpp, int rsft, int gsft, int bsft)
//
// Desc: Constructor for Generic BaseSoftRenderSurface
//
BaseSoftRenderSurface::BaseSoftRenderSurface(int w, int h, int bpp,
int rsft, int gsft, int bsft, int asft) :
pixels(0), pixels00(0), zbuffer(0), zbuffer00(0),
bytes_per_pixel(0), bits_per_pixel(0), format_type(0),
ox(0), oy(0), width(0), height(0), pitch(0), zpitch(0),
flipped(false), clip_window(0,0,0,0), lock_count(0), sdl_surf(0), rtt_tex(0)
{
clip_window.ResizeAbs(width = w, height = h);
switch (bpp) {
case 15:
format.r_loss = 3;
format.g_loss = 3;
format.b_loss = 3;
format.a_loss = 7;
bpp = 16;
break;
case 16:
format.r_loss = 3;
format.g_loss = 2;
format.b_loss = 3;
format.a_loss = 0;
break;
case 32:
format.r_loss = 0;
format.g_loss = 0;
format.b_loss = 0;
format.a_loss = 0;
break;
default:
break;
}
pitch = w*bpp/8;
bits_per_pixel = bpp;
bytes_per_pixel = bpp/8;
RenderSurface::format.s_bpp = bpp;
RenderSurface::format.s_bytes_per_pixel = bytes_per_pixel;
RenderSurface::format.r_loss16 = format.r_loss+8;
RenderSurface::format.g_loss16 = format.g_loss+8;
RenderSurface::format.b_loss16 = format.b_loss+8;
RenderSurface::format.a_loss16 = format.a_loss+8;
RenderSurface::format.r_shift = rsft;
RenderSurface::format.g_shift = gsft;
RenderSurface::format.b_shift = bsft;
RenderSurface::format.a_shift = asft;
RenderSurface::format.r_mask = (0xFF>>format.r_loss)<<rsft;
RenderSurface::format.g_mask = (0xFF>>format.g_loss)<<gsft;
RenderSurface::format.b_mask = (0xFF>>format.b_loss)<<bsft;
RenderSurface::format.a_mask = (0xFF>>format.a_loss)<<asft;
SetPixelsPointer();
}
//
// BaseSoftRenderSurface::BaseSoftRenderSurface(int w, int h, uint8 *buf)
//
// Desc: Constructor for Generic BaseSoftRenderSurface which matches screen params
//
BaseSoftRenderSurface::BaseSoftRenderSurface(int w, int h, uint8 *buf) :
pixels(0), pixels00(0), zbuffer(0), zbuffer00(0),
bytes_per_pixel(0), bits_per_pixel(0), format_type(0),
ox(0), oy(0), width(0), height(0), pitch(0), zpitch(0),
flipped(false), clip_window(0,0,0,0), lock_count(0), sdl_surf(0), rtt_tex(0)
{
clip_window.ResizeAbs(width = w, height = h);
int bpp = RenderSurface::format.s_bpp;
pitch = w*bpp/8;
bits_per_pixel = bpp;
bytes_per_pixel = bpp/8;
pixels00 = buf;
SetPixelsPointer();
}
//
// BaseSoftRenderSurface::BaseSoftRenderSurface(int w, int h, uint8 *buf)
//
// Desc: Constructor for Generic BaseSoftRenderSurface which matches screen params
//
BaseSoftRenderSurface::BaseSoftRenderSurface(int w, int h) :
pixels(0), pixels00(0), zbuffer(0), zbuffer00(0),
bytes_per_pixel(0), bits_per_pixel(0), format_type(0),
ox(0), oy(0), width(0), height(0), pitch(0), zpitch(0),
flipped(false), clip_window(0,0,0,0), lock_count(0), sdl_surf(0), rtt_tex(0)
{
clip_window.ResizeAbs(width = w, height = h);
int bpp = RenderSurface::format.s_bpp;
pitch = w*bpp/8;
bits_per_pixel = bpp;
bytes_per_pixel = bpp/8;
pixels00 = new uint8[pitch * height];
rtt_tex = new Texture;
rtt_tex->buffer = reinterpret_cast<uint32*>(pixels00);
rtt_tex->width = width;
rtt_tex->height = height;
rtt_tex->format = TEX_FMT_NATIVE;
rtt_tex->CalcLOG2s();
SetPixelsPointer();
}
//
// BaseSoftRenderSurface::~BaseSoftRenderSurface()
//
// Desc: Destructor
//
BaseSoftRenderSurface::~BaseSoftRenderSurface()
{
if (rtt_tex)
{
delete rtt_tex;
rtt_tex = 0;
delete [] pixels00;
pixels00 = 0;
delete [] zbuffer00;
zbuffer00 = 0;
}
}
//
// BaseSoftRenderSurface::BeginPainting()
//
// Desc: Prepare the surface for drawing this frame (in effect lock it for drawing)
// Returns: Non Zero on error
//
ECode BaseSoftRenderSurface::BeginPainting()
{
if (!lock_count) {
if (sdl_surf) {
// SDL_Surface requires locking
if (SDL_MUSTLOCK(sdl_surf))
{
// Did the lock fail?
if (SDL_LockSurface(sdl_surf)!=0) {
pixels = pixels00 = 0;
// TODO: SetLastError(GR_SOFT_ERROR_SDL_LOCK_FAILED, "SDL Surface Lock Failed!");
perr << "Error: SDL Surface Lock Failed!" << std::endl;
return GR_SOFT_ERROR_SDL_LOCK_FAILED;
}
}
// Pixels pointer
pixels00 = static_cast<uint8*>(sdl_surf->pixels);
pitch = sdl_surf->pitch;
if (flipped) pitch = -pitch;
}
else {
ECode ret = GenericLock();
if (ret.failed()) return ret;
}
}
lock_count++;
if (pixels00 == 0)
{
// TODO: SetLastError(GR_SOFT_ERROR_LOCKED_NULL_PIXELS, "Surface Locked with NULL BaseSoftRenderSurface::pixels pointer!");
perr << "Error: Surface Locked with NULL BaseSoftRenderSurface::pixels pointer!" << std::endl;
return GR_SOFT_ERROR_LOCKED_NULL_PIXELS;
}
// Origin offset pointers
SetPixelsPointer();
// No error
return P_NO_ERROR;
}
//
// BaseSoftRenderSurface::EndPainting()
//
// Desc: Prepare the surface for drawing this frame (in effect lock it for drawing)
// Returns: Non Zero on error
//
ECode BaseSoftRenderSurface::EndPainting()
{
// Already Unlocked
if (!lock_count)
{
// TODO: SetLastError(GR_SOFT_ERROR_BEGIN_END_MISMATCH, "BeginPainting()/EndPainting() Mismatch!");
perr << "Error: BeginPainting()/EndPainting() Mismatch!" << std::endl;
return GR_SOFT_ERROR_BEGIN_END_MISMATCH;
}
// Decrement counter
--lock_count;
if (!lock_count) {
if (sdl_surf) {
// Unlock the SDL_Surface if required
if (SDL_MUSTLOCK(sdl_surf)) SDL_UnlockSurface(sdl_surf);
// Clear pointers
pixels=pixels00=0;
// Present
SDL_RenderClear(sdl_rend);
SDL_RenderCopy(sdl_rend, sdl_tex, 0, 0);
SDL_RenderPresent(sdl_rend);
}
else {
ECode ret = GenericUnlock();
if (ret.failed()) return ret;
}
}
// No error
return P_NO_ERROR;
}
//
// Texture *BaseSoftRenderSurface::GetSurfaceAsTexture()
//
// Desc: Get the surface as a Texture. Only valid for SecondaryRenderSurfaces
//
Texture *BaseSoftRenderSurface::GetSurfaceAsTexture()
{
if (!rtt_tex)
{
perr << "Error: GetSurfaceAsTexture(): Surface doesn't render-to-texture" << std::endl;
}
return rtt_tex;
}
//
// void BaseSoftRenderSurface::CreateNativePalette(Palette* palette)
//
// Desc: Create a palette of colours native to the surface
//
void BaseSoftRenderSurface::CreateNativePalette(Pentagram::Palette* palette)
{
for (int i = 0; i < 256; i++)
{
sint32 r,g,b;
// Normal palette
palette->native_untransformed[i] = PACK_RGB8(palette->palette[i*3+0],
palette->palette[i*3+1],
palette->palette[i*3+2]);
r = palette->matrix[0] * palette->palette[i*3+0] +
palette->matrix[1] * palette->palette[i*3+1] +
palette->matrix[2] * palette->palette[i*3+2] +
palette->matrix[3] * 255;
if (r < 0) r = 0;
if (r > 0x7F800) r = 0x7F800;
g = palette->matrix[4] * palette->palette[i*3+0] +
palette->matrix[5] * palette->palette[i*3+1] +
palette->matrix[6] * palette->palette[i*3+2] +
palette->matrix[7] * 255;
if (g < 0) g = 0;
if (g > 0x7F800) g = 0x7F800;
b = palette->matrix[8] * palette->palette[i*3+0] +
palette->matrix[9] * palette->palette[i*3+1] +
palette->matrix[10] * palette->palette[i*3+2] +
palette->matrix[11] * 255;
if (b < 0) b = 0;
if (b > 0x7F800) b = 0x7F800;
// Transformed normal palette
// FIXME - Wont work on non SDL SRS Implementations
palette->native[i] = PACK_RGB8(static_cast<uint8>(r>>11),
static_cast<uint8>(g>>11),
static_cast<uint8>(b>>11));
// Transformed XFORM palette (Uses the TEX32 format)
if (TEX32_A(palette->xform_untransformed[i]))
{
r = palette->matrix[0] * TEX32_R(palette->xform_untransformed[i]) +
palette->matrix[1] * TEX32_G(palette->xform_untransformed[i]) +
palette->matrix[2] * TEX32_B(palette->xform_untransformed[i]) +
palette->matrix[3] * 255;
if (r < 0) r = 0;
if (r > 0x7F800) r = 0x7F800;
g = palette->matrix[4] * TEX32_R(palette->xform_untransformed[i]) +
palette->matrix[5] * TEX32_G(palette->xform_untransformed[i]) +
palette->matrix[6] * TEX32_B(palette->xform_untransformed[i]) +
palette->matrix[7] * 255;
if (g < 0) g = 0;
if (g > 0x7F800) g = 0x7F800;
b = palette->matrix[8] * TEX32_R(palette->xform_untransformed[i]) +
palette->matrix[9] * TEX32_G(palette->xform_untransformed[i]) +
palette->matrix[10] * TEX32_B(palette->xform_untransformed[i]) +
palette->matrix[11] * 255;
if (b < 0) b = 0;
if (b > 0x7F800) b = 0x7F800;
palette->xform[i] = TEX32_PACK_RGBA(static_cast<uint8>(r>>11),
static_cast<uint8>(g>>11),
static_cast<uint8>(b>>11),
TEX32_A(palette->xform_untransformed[i]));
}
else
palette->xform[i] = 0;
}
}
//
// void BaseSoftRenderSurface::GetSurfaceDims(Rect &r)
//
// Desc: Get the Surface Dimentions (and logical origin)
// r: Rect object to fill
//
void BaseSoftRenderSurface::GetSurfaceDims(Rect &r) const
{
r.Set(ox, oy, width, height);
}
//
// void BaseSoftRenderSurface::SetOrigin(sint32 x, sint32 y)
//
// Desc: Set the Phyiscal Pixel to be the logical origin
//
void BaseSoftRenderSurface::SetOrigin(sint32 x, sint32 y)
{
// Adjust the clipping window
clip_window.MoveRel(ox-x, oy-y);
// Set the origin
ox = x;
oy = y;
// The new pointers
SetPixelsPointer();
}
//
// void BaseSoftRenderSurface::GetOrigin(sint32 &x, sint32 &y)
//
// Desc: Get the Phyiscal Pixel that is the logical origin
//
void BaseSoftRenderSurface::GetOrigin(sint32 &x, sint32 &y) const
{
// Set the origin
x = ox;
y = oy;
}
//
// void BaseSoftRenderSurface::GetClippingRect(Rect &r)
//
// Desc: Get the Clipping Rectangle
// r: Rect object to fill
//
void BaseSoftRenderSurface::GetClippingRect(Rect &r) const
{
r = clip_window;
}
//
// void BaseSoftRenderSurface::GetClippingRect(Rect &r)
//
// Desc: Set the Clipping Rectangle
// r: Rect object that contains new Clipping Rectangle
//
void BaseSoftRenderSurface::SetClippingRect(const Rect &r)
{
// What we need to do is to clip the clipping rect to the phyiscal screen
clip_window = r;
clip_window.Intersect(-ox,-oy, width, height);
}
//
// sint16 BaseSoftRenderSurface::CheckClipped(Rect &r)
//
// Desc: Check for a clipped rectangle
// Returns: -1 if off screen,
// 0 if not clipped,
// 1 if clipped
//
sint16 BaseSoftRenderSurface::CheckClipped(const Rect &c) const
{
Rect r = c;
r.Intersect(clip_window);
// Clipped away to the void
if (!r.IsValid()) return -1;
else if (r == c) return 0;
else return 1;
}
//
// void BaseSoftRenderSurface::SetFlipped(bool flipped)
//
// Desc: Flip the surface
//
void BaseSoftRenderSurface::SetFlipped(bool wantFlipped)
{
// Flipping is not terrible complex
// But is a bit of a pain to set up
// First we check to see if we are currently flipped
if (wantFlipped == flipped) return;
flipped = wantFlipped;
// What we 'need' to do is negate the pitches, and flip the clipping window
// We keep the 'origin' in the same position relative to the clipping window
oy -= clip_window.y;
clip_window.y = height - (clip_window.y + clip_window.h);
oy += clip_window.y;
pitch = -pitch;
zpitch = -zpitch;
SetPixelsPointer();
}
//
// bool BaseSoftRenderSurface::IsFlipped() const
//
// Desc: Has the render surface been flipped?
//
bool BaseSoftRenderSurface::IsFlipped() const
{
return flipped;
}