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/*
** ClanLib SDK
** Copyright (c) 1997-2005 The ClanLib Team
**
** This software is provided 'as-is', without any express or implied
** warranty. In no event will the authors be held liable for any damages
** arising from the use of this software.
**
** Permission is granted to anyone to use this software for any purpose,
** including commercial applications, and to alter it and redistribute it
** freely, subject to the following restrictions:
**
** 1. The origin of this software must not be misrepresented; you must not
** claim that you wrote the original software. If you use this software
** in a product, an acknowledgment in the product documentation would be
** appreciated but is not required.
** 2. Altered source versions must be plainly marked as such, and must not be
** misrepresented as being the original software.
** 3. This notice may not be removed or altered from any source distribution.
**
** Note: Some of the libraries ClanLib may link to may have additional
** requirements or restrictions.
**
** File Author(s):
**
** Magnus Norddahl
** (if your name is missing here, please add it)
*/
#include "Display/display_precomp.h"
#include "surface_target.h"
#include "API/Display/surface.h"
/////////////////////////////////////////////////////////////////////////////
// CL_Surface_Target construction:
CL_Surface_Target::CL_Surface_Target()
: ref_count(0)
{
}
CL_Surface_Target::~CL_Surface_Target()
{
}
/////////////////////////////////////////////////////////////////////////////
// CL_Surface_Target attributes:
/////////////////////////////////////////////////////////////////////////////
// CL_Surface_Target operations:
void CL_Surface_Target::setup_target_params(
const CL_Surface_DrawParams2 ¶ms2,
CL_Surface_TargetDrawParams1 &t_params1)
{
// Find size of surface:
float size_width = (float) params2.srcWidth;
float size_height = (float) params2.srcHeight;
// Calculate translation hotspot
CL_Pointf translation_hotspot = calc_hotspot(
params2.translate_origin,
(float) params2.translate_x,
(float) params2.translate_y,
size_width,
size_height);
// Calculate rotation hotspot:
t_params1.rotation_hotspot = calc_hotspot(
params2.rotate_origin,
(float) params2.rotate_x,
(float) params2.rotate_y,
size_width,
size_height);
if (!params2.sub_pixel_accuracy)
{
// Avoid linear smoothing:
translation_hotspot.x = float(int(translation_hotspot.x));
translation_hotspot.y = float(int(translation_hotspot.y));
t_params1.rotation_hotspot.x = float(int(t_params1.rotation_hotspot.x));
t_params1.rotation_hotspot.y = float(int(t_params1.rotation_hotspot.y));
}
// Find top left point of destination rectangle and map rotation hotspot to screen coordinates:
if (params2.scale_x == 1.0 && params2.scale_y == 1.0)
{
t_params1.destWidth = params2.srcWidth;
t_params1.destHeight = params2.srcHeight;
t_params1.pixDestX = params2.destX-translation_hotspot.x;
t_params1.pixDestY = params2.destY-translation_hotspot.y;
t_params1.rotation_hotspot.x += float(t_params1.pixDestX);
t_params1.rotation_hotspot.y += float(t_params1.pixDestY);
}
else
{
t_params1.destWidth = params2.srcWidth * params2.scale_x;
t_params1.destHeight = params2.srcHeight * params2.scale_y;
t_params1.pixDestX = params2.destX-translation_hotspot.x * params2.scale_x;
t_params1.pixDestY = params2.destY-translation_hotspot.y * params2.scale_y;
t_params1.rotation_hotspot.x = float(t_params1.pixDestX + t_params1.rotation_hotspot.x * params2.scale_x);
t_params1.rotation_hotspot.y = float(t_params1.pixDestY + t_params1.rotation_hotspot.y * params2.scale_y);
}
}
void CL_Surface_Target::setup_draw_params(
const CL_Surface_DrawParams2 & params2,
const CL_Surface_TargetDrawParams1 *t_params1,
CL_Surface_DrawParams1 ¶ms1)
{
// Calculate unit vectors for rotated surface:
// (cached for speed reasons)
static double vect_rotate_x[2] = { 1.0, 0.0 };
static double vect_rotate_y[2] = { 0.0, 1.0 };
static double last_angle = 0.0;
if (last_angle != params2.rotate_angle)
{
if (params2.rotate_angle == 0.0)
{
vect_rotate_x[0] = 1.0;
vect_rotate_x[1] = 0.0;
vect_rotate_y[0] = 0.0;
vect_rotate_y[1] = 1.0;
}
else if (params2.rotate_angle == 90.0)
{
vect_rotate_x[0] = 0.0;
vect_rotate_x[1] = 1.0;
vect_rotate_y[0] = -1.0;
vect_rotate_y[1] = 0.0;
}
else if (params2.rotate_angle == 180.0)
{
vect_rotate_x[0] = -1.0;
vect_rotate_x[1] = 0.0;
vect_rotate_y[0] = 0.0;
vect_rotate_y[1] = -1.0;
}
else if (params2.rotate_angle == 270.0)
{
vect_rotate_x[0] = 0.0;
vect_rotate_x[1] = -1.0;
vect_rotate_y[0] = 1.0;
vect_rotate_y[1] = 0.0;
}
else
{
double angle_rad = 3.1415926f*params2.rotate_angle/180;
vect_rotate_x[0] = cos(angle_rad);
vect_rotate_x[1] = sin(angle_rad);
vect_rotate_y[0] = cos(3.1415926f/2+angle_rad);
vect_rotate_y[1] = sin(3.1415926f/2+angle_rad);
}
}
// Calculate final source rectangle points for render:
params1.srcX[0] = params2.srcX;
params1.srcY[0] = params2.srcY;
params1.srcX[1] = params2.srcX+params2.srcWidth;
params1.srcY[1] = params2.srcY;
params1.srcX[2] = params2.srcX+params2.srcWidth;
params1.srcY[2] = params2.srcY+params2.srcHeight;
params1.srcX[3] = params2.srcX;
params1.srcY[3] = params2.srcY+params2.srcHeight;
// Calculate final destination rectangle points for surface rectangle:
if (params2.rotate_angle == 0.0)
{
params1.destX[0] = t_params1->pixDestX;
params1.destY[0] = t_params1->pixDestY;
params1.destX[1] = t_params1->pixDestX+t_params1->destWidth;
params1.destY[1] = t_params1->pixDestY;
params1.destX[2] = t_params1->pixDestX+t_params1->destWidth;
params1.destY[2] = t_params1->pixDestY+t_params1->destHeight;
params1.destX[3] = t_params1->pixDestX;
params1.destY[3] = t_params1->pixDestY+t_params1->destHeight;
}
else
{
// roll
params1.destX[0] = calc_rotate_x(t_params1->pixDestX, t_params1->pixDestY, t_params1->rotation_hotspot.x, t_params1->rotation_hotspot.y, vect_rotate_x[0], vect_rotate_y[0]);
params1.destY[0] = calc_rotate_y(t_params1->pixDestX, t_params1->pixDestY, t_params1->rotation_hotspot.x, t_params1->rotation_hotspot.y, vect_rotate_x[1], vect_rotate_y[1]);
params1.destX[1] = calc_rotate_x(t_params1->pixDestX+t_params1->destWidth, t_params1->pixDestY, t_params1->rotation_hotspot.x, t_params1->rotation_hotspot.y, vect_rotate_x[0], vect_rotate_y[0]);
params1.destY[1] = calc_rotate_y(t_params1->pixDestX+t_params1->destWidth, t_params1->pixDestY, t_params1->rotation_hotspot.x, t_params1->rotation_hotspot.y, vect_rotate_x[1], vect_rotate_y[1]);
params1.destX[2] = calc_rotate_x(t_params1->pixDestX+t_params1->destWidth, t_params1->pixDestY+t_params1->destHeight, t_params1->rotation_hotspot.x, t_params1->rotation_hotspot.y, vect_rotate_x[0], vect_rotate_y[0]);
params1.destY[2] = calc_rotate_y(t_params1->pixDestX+t_params1->destWidth, t_params1->pixDestY+t_params1->destHeight, t_params1->rotation_hotspot.x, t_params1->rotation_hotspot.y, vect_rotate_x[1], vect_rotate_y[1]);
params1.destX[3] = calc_rotate_x(t_params1->pixDestX, t_params1->pixDestY+t_params1->destHeight, t_params1->rotation_hotspot.x, t_params1->rotation_hotspot.y, vect_rotate_x[0], vect_rotate_y[0]);
params1.destY[3] = calc_rotate_y(t_params1->pixDestX, t_params1->pixDestY+t_params1->destHeight, t_params1->rotation_hotspot.x, t_params1->rotation_hotspot.y, vect_rotate_x[1], vect_rotate_y[1]);
}
// pitch
if (params2.rotate_pitch != 0.0)
{
double pitch_rad = sin(3.1415926f/2 + (3.1415926f*params2.rotate_pitch/180));
params1.destY[0] = (params1.destY[0] - t_params1->rotation_hotspot.y) * pitch_rad + t_params1->rotation_hotspot.y;
params1.destY[1] = (params1.destY[1] - t_params1->rotation_hotspot.y) * pitch_rad + t_params1->rotation_hotspot.y;
params1.destY[2] = (params1.destY[2] - t_params1->rotation_hotspot.y) * pitch_rad + t_params1->rotation_hotspot.y;
params1.destY[3] = (params1.destY[3] - t_params1->rotation_hotspot.y) * pitch_rad + t_params1->rotation_hotspot.y;
}
// yaw
if (params2.rotate_yaw != 0.0)
{
double yaw_rad = cos(3.1415926f*params2.rotate_yaw/180);
params1.destX[0] = (params1.destX[0] - t_params1->rotation_hotspot.x) * yaw_rad + t_params1->rotation_hotspot.x;
params1.destX[1] = (params1.destX[1] - t_params1->rotation_hotspot.x) * yaw_rad + t_params1->rotation_hotspot.x;
params1.destX[2] = (params1.destX[2] - t_params1->rotation_hotspot.x) * yaw_rad + t_params1->rotation_hotspot.x;
params1.destX[3] = (params1.destX[3] - t_params1->rotation_hotspot.x) * yaw_rad + t_params1->rotation_hotspot.x;
}
params1.red[0] = params2.red;
params1.red[1] = params2.red;
params1.red[2] = params2.red;
params1.red[3] = params2.red;
params1.green[0] = params2.green;
params1.green[1] = params2.green;
params1.green[2] = params2.green;
params1.green[3] = params2.green;
params1.blue[0] = params2.blue;
params1.blue[1] = params2.blue;
params1.blue[2] = params2.blue;
params1.blue[3] = params2.blue;
params1.alpha[0] = params2.alpha;
params1.alpha[1] = params2.alpha;
params1.alpha[2] = params2.alpha;
params1.alpha[3] = params2.alpha;
params1.destZ = params2.destZ;
params1.blend_src = params2.blend_src;
params1.blend_dest = params2.blend_dest;
params1.blendfunc_src_alpha = params2.blendfunc_src_alpha;
params1.blendfunc_dest_alpha = params2.blendfunc_dest_alpha;
params1.sub_pixel_accuracy = params2.sub_pixel_accuracy;
}
void CL_Surface_Target::draw(
CL_Surface_Generic *attributes,
const CL_Surface_DrawParams2& params2,
CL_GraphicContext *context)
{
static CL_Surface_TargetDrawParams1 t_params1;
setup_target_params(params2, t_params1);
draw(
attributes,
params2,
&t_params1,
context);
}
void CL_Surface_Target::draw(
CL_Surface_Generic *attributes,
const CL_Surface_DrawParams2& params2,
CL_Surface_TargetDrawParams1 *t_params1,
CL_GraphicContext *context)
{
static CL_Surface_DrawParams1 params1;
setup_draw_params(params2, t_params1, params1);
// Draw the surface:
draw(attributes,
params1,
context);
}
void CL_Surface_Target::add_ref()
{
ref_count++;
}
void CL_Surface_Target::release_ref()
{
ref_count--;
if (ref_count == 0) delete this;
}
int CL_Surface_Target::get_handle() {
return -1;
}
/////////////////////////////////////////////////////////////////////////////
// Implementation:
|
