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Add MatrixFloat2D and MatrixFixed2D operations to GMISC.

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Add polygon demo
This commit is contained in:
inmarket 2014-11-21 17:09:44 +10:00
parent 74c23de1d2
commit 87242d0a6c
8 changed files with 684 additions and 6 deletions
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3
demos/modules/gdisp/polygons/demo.mk Normal file
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@ -0,0 +1,3 @@
DEMODIR = $(GFXLIB)/demos/modules/gdisp/polygons
GFXINC += $(DEMODIR)
GFXSRC += $(DEMODIR)/main.c

66
demos/modules/gdisp/polygons/gfxconf.h Normal file
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@ -0,0 +1,66 @@
/*
* Copyright (c) 2012, 2013, Joel Bodenmann aka Tectu <joel@unormal.org>
* Copyright (c) 2012, 2013, Andrew Hannam aka inmarket
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of the <organization> nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _GFXCONF_H
#define _GFXCONF_H
/* The operating system to use. One of these must be defined - preferably in your Makefile */
//#define GFX_USE_OS_CHIBIOS FALSE
//#define GFX_USE_OS_WIN32 FALSE
//#define GFX_USE_OS_LINUX FALSE
//#define GFX_USE_OS_OSX FALSE
/* GFX sub-systems to turn on */
#define GFX_USE_GDISP TRUE
#define GFX_USE_GMISC TRUE
/* Features for the GDISP sub-system. */
#define GDISP_NEED_VALIDATION TRUE
#define GDISP_NEED_CLIP TRUE
#define GDISP_NEED_CONVEX_POLYGON TRUE
/* For this demo define either:
* GMISC_NEED_MATRIXFLOAT2D to use floating point math operations
*
* or
*
* GMISC_NEED_MATRIXFIXED2D to use fixed point math operations.
*
* If you choose floating point you may optionally define GMISC_NEED_FASTTRIG.
* If you choose fixed point you MUST define GMISC_NEED_FIXEDTRIG for this demo.
*/
//#define GMISC_NEED_FASTTRIG TRUE
//#define GMISC_NEED_MATRIXFLOAT2D TRUE
#define GMISC_NEED_FIXEDTRIG TRUE
#define GMISC_NEED_MATRIXFIXED2D TRUE
#endif /* _GFXCONF_H */

160
demos/modules/gdisp/polygons/main.c Normal file
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@ -0,0 +1,160 @@
/*
* Copyright (c) 2012, 2013, Joel Bodenmann aka Tectu <joel@unormal.org>
* Copyright (c) 2012, 2013, Andrew Hannam aka inmarket
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of the <organization> nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "gfx.h"
#include <string.h>
#define FRAME_DELAY 100 /* The interframe delay in milliseconds */
// Our shape definition
static const point shape[] = {
{ 10, 10 },
{ 10, 15 },
{ 17, 17 },
{ 20, 5 },
{ 10, 0 },
{ 3, -10},
{ -7, -15},
{ -15, -15},
{ -13, -12 },
{ -8, 0 },
};
#define NUM_POINTS (sizeof(shape)/sizeof(shape[0]))
// Where we put our calculated points
static point result[NUM_POINTS];
static point oldresult[NUM_POINTS];
// Make fixed point and floating point options look pretty similar
#if GMISC_NEED_MATRIXFLOAT2D
static MatrixFloat2D m1, m2;
typedef float mtype;
#define FP2MTYPE(f) (f)
#define INT2MTYPE(i) (i)
#elif GMISC_NEED_MATRIXFIXED2D
static MatrixFixed2D m1, m2;
typedef fixed mtype;
#define FP2MTYPE(f) FP2FIXED(f)
#define INT2MTYPE(i) FIXED(i)
#else
#error "Either GMISC_NEED_MATRIXFLOAT2D or GMISC_NEED_MATRIXFIXED2D must be defined for this demo"
#endif
int main(void) {
coord_t width, height;
mtype scalex, scaley;
mtype scaleincx, scaleincy;
mtype translatex, translatey;
mtype transincx, transincy;
mtype transmaxx, transmaxy;
mtype transminx, transminy;
int angle;
int angleinc;
// Initialize and clear the display
gfxInit();
gdispClear(White);
// Get the screen size
width = gdispGetWidth();
height = gdispGetHeight();
// Initial position, rotation and scale
scalex = scaley = FP2MTYPE(1.0);
translatex = INT2MTYPE(width/2);
translatey = INT2MTYPE(height/2);
angle = 0;
// How much to change the position, rotation and scale each cycle
scaleincx = scaleincy = FP2MTYPE(0.5);
transincx = INT2MTYPE(2);
transincy = INT2MTYPE(-2);
angleinc = 2;
transmaxx = INT2MTYPE(width - 15);
transminx = INT2MTYPE(15);
transmaxy = INT2MTYPE(height - 15);
transminy = INT2MTYPE(15);
while(TRUE) {
// Move to the new location, rotation and scale
scalex += scaleincx;
scaley += scaleincy;
angle += angleinc;
if (angle >= 360)
angle -= 360;
translatex += transincx;
translatey += transincy;
// Adjust our speed etc
if (scalex > FP2MTYPE(10.0)) scaleincx = FP2MTYPE(-0.3);
else if (scalex < FP2MTYPE(1.0)) scaleincx = FP2MTYPE(0.5);
if (scaley > FP2MTYPE(7.0)) scaleincy = FP2MTYPE(-0.25);
else if (scaley < FP2MTYPE(1.0)) scaleincy = FP2MTYPE(0.3);
if (translatex > transmaxx || translatex < transminx) transincx = -transincx;
if (translatey > transmaxy || translatey < transminy) transincy = -transincy;
// Build a matrix of all the operations we want to do and then apply it to all the shape points
#if GMISC_NEED_MATRIXFLOAT2D
gmiscMatrixFloat2DApplyScale(&m1, 0, scalex, scaley);
gmiscMatrixFloat2DApplyRotation(&m2, &m1, angle);
gmiscMatrixFloat2DApplyTranslation(&m1, &m2, translatex, translatey);
gmiscMatrixFloat2DApplyToPoints(result, shape, &m1, NUM_POINTS);
#else
gmiscMatrixFixed2DApplyScale(&m1, 0, scalex, scaley);
gmiscMatrixFixed2DApplyRotation(&m2, &m1, angle);
gmiscMatrixFixed2DApplyTranslation(&m1, &m2, translatex, translatey);
gmiscMatrixFixed2DApplyToPoints(result, shape, &m1, NUM_POINTS);
#endif
// Clear the old shape
gdispDrawPoly(0, 0, oldresult, NUM_POINTS, White);
gdispFillConvexPoly(0, 0, oldresult, NUM_POINTS, White);
// Play the new shape position
// NOTE: Because our shape is not a true convex polygon, we get some frames
// where the line outline and the filled shape don't match. This is
// expected due to the shapes non-convex nature and was left in the
// demo to demonstrate this exact point.
gdispFillConvexPoly(0, 0, result, NUM_POINTS, Red);
gdispDrawPoly(0, 0, result, NUM_POINTS, Blue);
// Make sure the display is updated
gdispFlush();
// Save the results so we can clear them next cycle
memcpy(oldresult, result, sizeof(result));
// Delay for a while
gfxSleepMilliseconds(FRAME_DELAY);
}
}

2
docs/releases.txt
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@ -38,6 +38,8 @@ DEPRECATE: gwinAttachMouse() is now handled automaticly.
FEATURE: Added MAX11802 touch driver by user steved
FEATURE: Added STM32F429i-Discovery board support
FEATURE: Added DejaVuSans20 and DejaVuSans20_aa built-in fonts
FEATURE: Added MatrixFloat2D and MatrixFixed2D operations to GMISC
FEATURE: Added polygon drawing demo (with rotation, scaling and translation)
*** Release 2.1 ***

2
gfxconf.example.h
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@ -279,5 +279,7 @@
//#define GMISC_NEED_INVSQRT FALSE
// #define GMISC_INVSQRT_MIXED_ENDIAN FALSE
// #define GMISC_INVSQRT_REAL_SLOW FALSE
//#define GMISC_NEED_MATRIXFLOAT2D FALSE
//#define GMISC_NEED_MATRIXFIXED2D FALSE
#endif /* _GFXCONF_H */

196
src/gmisc/gmisc_matrix2d.c Normal file
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@ -0,0 +1,196 @@
/*
* This file is subject to the terms of the GFX License. If a copy of
* the license was not distributed with this file, you can obtain one at:
*
* http://ugfx.org/license.html
*/
/**
* @file src/gmisc/gmisc_matrix2d.c
* @brief GMISC 2D matrix operations code.
*/
#include "gfx.h"
#if GFX_USE_GMISC
#if GMISC_NEED_MATRIXFLOAT2D
#if !GMISC_NEED_FASTTRIG
#include <math.h>
#endif
void gmiscMatrixFloat2DSetIdentity(MatrixFloat2D *m) {
m->a00 = m->a11 = m->a22 = 1.0;
m->a01 = m->a02 = m->a10 = m->a12 = m->a20 = m->a21 = 0.0;
}
void gmiscMatrixFloat2DMultiply(MatrixFloat2D *dst, const MatrixFloat2D *src1, const MatrixFloat2D *src2) {
dst->a00 = src1->a00*src2->a00 + src1->a01*src2->a10 + src1->a02*src2->a20;
dst->a01 = src1->a00*src2->a01 + src1->a01*src2->a11 + src1->a02*src2->a21;
dst->a02 = src1->a00*src2->a02 + src1->a01*src2->a12 + src1->a02*src2->a22;
dst->a10 = src1->a10*src2->a00 + src1->a11*src2->a10 + src1->a12*src2->a20;
dst->a11 = src1->a10*src2->a01 + src1->a11*src2->a11 + src1->a12*src2->a21;
dst->a12 = src1->a10*src2->a02 + src1->a11*src2->a12 + src1->a12*src2->a22;
dst->a20 = src1->a20*src2->a00 + src1->a21*src2->a10 + src1->a22*src2->a20;
dst->a21 = src1->a20*src2->a01 + src1->a21*src2->a11 + src1->a22*src2->a21;
dst->a22 = src1->a20*src2->a02 + src1->a21*src2->a12 + src1->a22*src2->a22;
}
void gmiscMatrixFloat2DApplyTranslation(MatrixFloat2D *dst, const MatrixFloat2D *src, float tx, float ty) {
if (src) {
dst->a00 = src->a00; dst->a01 = src->a01; dst->a02 = src->a02+tx;
dst->a10 = src->a10; dst->a11 = src->a11; dst->a12 = src->a12+ty;
dst->a20 = src->a20; dst->a21 = src->a21; dst->a22 = src->a22;
} else {
dst->a00 = 1.0; dst->a01 = 0.0; dst->a02 = tx;
dst->a10 = 0.0; dst->a11 = 1.0; dst->a12 = ty;
dst->a20 = 0.0; dst->a21 = 0.0; dst->a22 = 1.0;
}
}
void gmiscMatrixFloat2DApplyScale(MatrixFloat2D *dst, const MatrixFloat2D *src, float sx, float sy) {
if (src) {
dst->a00 = src->a00*sx; dst->a01 = src->a01*sy; dst->a02 = src->a02;
dst->a10 = src->a10*sx; dst->a11 = src->a11*sy; dst->a12 = src->a12;
dst->a20 = src->a20*sx; dst->a21 = src->a21*sy; dst->a22 = src->a22;
} else {
dst->a00 = sx; dst->a01 = 0.0; dst->a02 = 0.0;
dst->a10 = 0.0; dst->a11 = sy; dst->a12 = 0.0;
dst->a20 = 0.0; dst->a21 = 0.0; dst->a22 = 1.0;
}
}
void gmiscMatrixFloat2DApplyShear(MatrixFloat2D *dst, const MatrixFloat2D *src, float sx, float sy) {
if (src) {
dst->a00 = src->a00 + src->a01*sy; dst->a01 = src->a00*sx + src->a01; dst->a02 = src->a02;
dst->a10 = src->a10 + src->a11*sy; dst->a11 = src->a10*sx + src->a11; dst->a12 = src->a12;
dst->a20 = src->a20 + src->a21*sy; dst->a21 = src->a20*sx + src->a21; dst->a22 = src->a22;
} else {
dst->a00 = 1.0; dst->a01 = sx; dst->a02 = 0.0;
dst->a10 = sy; dst->a11 = 1.0; dst->a12 = 0.0;
dst->a20 = 0.0; dst->a21 = 0.0; dst->a22 = 1.0;
}
}
void gmiscMatrixFloat2DApplyRotation(MatrixFloat2D *dst, const MatrixFloat2D *src, int angle) {
float s, c;
#if GMISC_NEED_FASTTRIG
s = fsin(angle);
c = fcos(angle);
#else
c = angle*M_PI/180;
s = sin(c);
c = cos(c);
#endif
if (src) {
dst->a00 = src->a00*c - src->a01*s; dst->a01 = src->a00*s + src->a01*c; dst->a02 = src->a02;
dst->a10 = src->a10*c - src->a11*s; dst->a11 = src->a10*s + src->a11*c; dst->a12 = src->a12;
dst->a20 = src->a20*c - src->a21*s; dst->a21 = src->a20*s + src->a21*c; dst->a22 = src->a22;
} else {
dst->a00 = c; dst->a01 = s; dst->a02 = 0.0;
dst->a10 = -s; dst->a11 = c; dst->a12 = 0.0;
dst->a20 = 0.0; dst->a21 = 0.0; dst->a22 = 1.0;
}
}
void gmiscMatrixFloat2DApplyToPoints(point *dst, const point *src, const MatrixFloat2D *m, int cnt) {
float x;
for( ;cnt--; dst++, src++) {
x = src->x; // This allows in-place operation
dst->x = round(x*m->a00+src->y*m->a01+m->a02);
dst->y = round(x*m->a10+src->y*m->a11+m->a12);
}
}
#endif // GMISC_NEED_MATRIXFLOAT2D
#if GMISC_NEED_MATRIXFIXED2D
void gmiscMatrixFixed2DSetIdentity(MatrixFixed2D *m) {
m->a00 = m->a11 = m->a22 = FIXED(1);
m->a01 = m->a02 = m->a10 = m->a12 = m->a20 = m->a21 = 0;
}
void gmiscMatrixFixed2DMultiply(MatrixFixed2D *dst, const MatrixFixed2D *src1, const MatrixFixed2D *src2) {
dst->a00 = FIXEDMUL(src1->a00,src2->a00) + FIXEDMUL(src1->a01,src2->a10) + FIXEDMUL(src1->a02,src2->a20);
dst->a01 = FIXEDMUL(src1->a00,src2->a01) + FIXEDMUL(src1->a01,src2->a11) + FIXEDMUL(src1->a02,src2->a21);
dst->a02 = FIXEDMUL(src1->a00,src2->a02) + FIXEDMUL(src1->a01,src2->a12) + FIXEDMUL(src1->a02,src2->a22);
dst->a10 = FIXEDMUL(src1->a10,src2->a00) + FIXEDMUL(src1->a11,src2->a10) + FIXEDMUL(src1->a12,src2->a20);
dst->a11 = FIXEDMUL(src1->a10,src2->a01) + FIXEDMUL(src1->a11,src2->a11) + FIXEDMUL(src1->a12,src2->a21);
dst->a12 = FIXEDMUL(src1->a10,src2->a02) + FIXEDMUL(src1->a11,src2->a12) + FIXEDMUL(src1->a12,src2->a22);
dst->a20 = FIXEDMUL(src1->a20,src2->a00) + FIXEDMUL(src1->a21,src2->a10) + FIXEDMUL(src1->a22,src2->a20);
dst->a21 = FIXEDMUL(src1->a20,src2->a01) + FIXEDMUL(src1->a21,src2->a11) + FIXEDMUL(src1->a22,src2->a21);
dst->a22 = FIXEDMUL(src1->a20,src2->a02) + FIXEDMUL(src1->a21,src2->a12) + FIXEDMUL(src1->a22,src2->a22);
}
void gmiscMatrixFixed2DApplyTranslation(MatrixFixed2D *dst, const MatrixFixed2D *src, fixed tx, fixed ty) {
if (src) {
dst->a00 = src->a00; dst->a01 = src->a01; dst->a02 = src->a02+tx;
dst->a10 = src->a10; dst->a11 = src->a11; dst->a12 = src->a12+ty;
dst->a20 = src->a20; dst->a21 = src->a21; dst->a22 = src->a22;
} else {
dst->a00 = FIXED(1); dst->a01 = 0; dst->a02 = tx;
dst->a10 = 0; dst->a11 = FIXED(1); dst->a12 = ty;
dst->a20 = 0; dst->a21 = 0; dst->a22 = FIXED(1);
}
}
void gmiscMatrixFixed2DApplyScale(MatrixFixed2D *dst, const MatrixFixed2D *src, fixed sx, fixed sy) {
if (src) {
dst->a00 = FIXEDMUL(sx,src->a00); dst->a01 = FIXEDMUL(sy,src->a01); dst->a02 = src->a02;
dst->a10 = FIXEDMUL(sx,src->a10); dst->a11 = FIXEDMUL(sy,src->a11); dst->a12 = src->a12;
dst->a20 = FIXEDMUL(sx,src->a20); dst->a21 = FIXEDMUL(sy,src->a21); dst->a22 = src->a22;
} else {
dst->a00 = sx; dst->a01 = 0; dst->a02 = 0;
dst->a10 = 0; dst->a11 = sy; dst->a12 = 0;
dst->a20 = 0; dst->a21 = 0; dst->a22 = FIXED(1);
}
}
void gmiscMatrixFixed2DApplyShear(MatrixFixed2D *dst, const MatrixFixed2D *src, fixed sx, fixed sy) {
if (src) {
dst->a00 = src->a00 + FIXEDMUL(sy,src->a01); dst->a01 = FIXEDMUL(sx,src->a00) + src->a01; dst->a02 = src->a02;
dst->a10 = src->a10 + FIXEDMUL(sy,src->a11); dst->a11 = FIXEDMUL(sx,src->a10) + src->a11; dst->a12 = src->a12;
dst->a20 = src->a20 + FIXEDMUL(sy,src->a21); dst->a21 = FIXEDMUL(sx,src->a20) + src->a21; dst->a22 = src->a22;
} else {
dst->a00 = FIXED(1); dst->a01 = sx; dst->a02 = 0;
dst->a10 = sy; dst->a11 = FIXED(1); dst->a12 = 0;
dst->a20 = 0; dst->a21 = 0; dst->a22 = FIXED(1);
}
}
#if GMISC_NEED_FIXEDTRIG
void gmiscMatrixFixed2DApplyRotation(MatrixFixed2D *dst, const MatrixFixed2D *src, int angle) {
fixed s, c;
s = ffsin(angle);
c = ffcos(angle);
if (src) {
dst->a00 = FIXEDMUL(c,src->a00) - FIXEDMUL(s,src->a01); dst->a01 = FIXEDMUL(s,src->a00) + FIXEDMUL(c,src->a01); dst->a02 = src->a02;
dst->a10 = FIXEDMUL(c,src->a10) - FIXEDMUL(s,src->a11); dst->a11 = FIXEDMUL(s,src->a10) + FIXEDMUL(c,src->a11); dst->a12 = src->a12;
dst->a20 = FIXEDMUL(c,src->a20) - FIXEDMUL(s,src->a21); dst->a21 = FIXEDMUL(s,src->a20) + FIXEDMUL(c,src->a21); dst->a22 = src->a22;
} else {
dst->a00 = c; dst->a01 = s; dst->a02 = 0;
dst->a10 = -s; dst->a11 = c; dst->a12 = 0;
dst->a20 = 0; dst->a21 = 0; dst->a22 = FIXED(1);
}
}
#endif
void gmiscMatrixFixed2DApplyToPoints(point *dst, const point *src, const MatrixFixed2D *m, int cnt) {
coord_t x;
for( ;cnt--; dst++, src++) {
x = src->x; // This allows in-place operation
dst->x = NONFIXED(x*m->a00+src->y*m->a01+m->a02+FIXED0_5);
dst->y = NONFIXED(x*m->a10+src->y*m->a11+m->a12+FIXED0_5);
}
}
#endif // GMISC_NEED_MATRIXFIXED2D
#endif // GFX_USE_GMISC

260
src/gmisc/sys_defs.h
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@ -25,6 +25,9 @@
/* Type definitions */
/*===========================================================================*/
// Forward definition
typedef struct point point;
/**
* @brief Sample data formats
* @note These are defined regardless of whether you use the GMISC module
@ -60,11 +63,13 @@ typedef int32_t fixed;
* @brief Macros to convert to and from a fixed point.
* @{
*/
#define FIXED(x) ((fixed)(x)<<16) /* @< integer to fixed */
#define NONFIXED(x) ((x)>>16) /* @< fixed to integer */
#define FIXED0_5 32768 /* @< 0.5 as a fixed (used for rounding) */
#define FP2FIXED(x) ((fixed)((x)*65536.0)) /* @< floating point to fixed */
#define FIXED2FP(x) ((double)(x)/65536.0) /* @< fixed to floating point */
#define FIXED(x) ((fixed)(x)<<16) /* @< integer to fixed */
#define NONFIXED(x) ((x)>>16) /* @< fixed to integer */
#define FIXED0_5 32768 /* @< 0.5 as a fixed (used for rounding) */
#define FP2FIXED(x) ((fixed)((x)*65536.0)) /* @< floating point to fixed */
#define FIXED2FP(x) ((double)(x)/65536.0) /* @< fixed to floating point */
#define FIXEDMUL(a,b) ((fixed)((((long long)(a))*(b))>>16)) /* @< fixed,fixed multiplication */
#define FIXEDMULINT(a,b) ((a)*(b)) /* @< integer,fixed multiplication */
/** @} */
/**
@ -90,6 +95,7 @@ extern "C" {
#if GMISC_NEED_ARRAYOPS || defined(__DOXYGEN__)
/**
* @brief Convert from one array format to another array format.
* @pre Requires GFX_USE_GMISC and GMISC_NEED_ARRAYOPS
*
* @param[in] srcfmt The format of the source array
* @param[in] src The source array
@ -131,6 +137,7 @@ extern "C" {
/**
* @brief Fast Table Based Trig functions
* @return A double in the range -1.0 .. 0.0 .. 1.0
* @pre Requires GFX_USE_GMISC and GMISC_NEED_FASTTRIG
*
* @param[in] degrees The angle in degrees (not radians)
*
@ -145,6 +152,7 @@ extern "C" {
*
* @brief Fast Table Based Trig functions
* @return A double in the range -1.0 .. 0.0 .. 1.0
* @pre Requires GFX_USE_GMISC and GMISC_NEED_FASTTRIG
*
* @param[in] degrees The angle in degrees 0 .. 359
*
@ -166,6 +174,7 @@ extern "C" {
/**
* @brief Fast Table Based Trig functions
* @return A fixed point in the range -1.0 .. 0.0 .. 1.0
* @pre Requires GFX_USE_GMISC and GMISC_NEED_FIXEDTRIG
*
* @param[in] degrees The angle in degrees (not radians)
*
@ -180,6 +189,7 @@ extern "C" {
*
* @brief Fast Table Based Trig functions
* @return A fixed point in the range -1.0 .. 0.0 .. 1.0
* @pre Requires GFX_USE_GMISC and GMISC_NEED_FIXEDTRIG
*
* @param[in] degrees The angle in degrees 0 .. 359
*
@ -195,10 +205,11 @@ extern "C" {
/** @} */
#endif
#if GMISC_NEED_INVSQRT
#if GMISC_NEED_INVSQRT || defined(__DOXYGEN__)
/**
* @brief Fast inverse square root function (x^-1/2)
* @return The approximate inverse square root
* @pre Requires GFX_USE_GMISC and GMISC_NEED_INVSQRT
*
* @param[in] n The number to find the inverse square root of
*
@ -212,6 +223,243 @@ extern "C" {
*/
float invsqrt(float n);
#endif
#if GMISC_NEED_MATRIXFLOAT2D || defined(__DOXYGEN__)
/**
* @brief A matrix for doing 2D graphics using floats
* @pre Requires GFX_USE_GMISC and GMISC_NEED_MATRIXFLOAT2D
*/
typedef struct MatrixFloat2D {
float a00, a01, a02;
float a10, a11, a12;
float a20, a21, a22;
} MatrixFloat2D;
/**
* @brief Apply the matrix to a set of points
* @pre Requires GFX_USE_GMISC and GMISC_NEED_MATRIXFLOAT2D
*
* @param[in] dst The destination array of points
* @param[in] src The source array of points
* @param[in] m The matrix to apply
* @param[in] cnt How many points are in the array
*
* @note In-place matrix application is allowed ie. dst = src
*
* @api
*/
void gmiscMatrixFloat2DApplyToPoints(point *dst, const point *src, const MatrixFloat2D *m, int cnt);
/**
* @brief Set the 2D matrix to the identity matrix
* @pre Requires GFX_USE_GMISC and GMISC_NEED_MATRIXFLOAT2D
*
* @param[in] m The matrix to set to identity
*
* @api
*/
void gmiscMatrixFloat2DSetIdentity(MatrixFloat2D *m);
/**
* @brief Multiple two 2D matrixes together
* @pre Requires GFX_USE_GMISC and GMISC_NEED_MATRIXFLOAT2D
*
* @param[in] dst The destination matrix
* @param[in] src1 The first source matrix
* @param[in] src2 The second source matrix
*
* @note In-place matrix application is NOT allowed ie. dst != src1, dst != src2
*
* @api
*/
void gmiscMatrixFloat2DMultiply(MatrixFloat2D *dst, const MatrixFloat2D *src1, const MatrixFloat2D *src2);
/**
* @brief Add an x,y translation to a matrix
* @pre Requires GFX_USE_GMISC and GMISC_NEED_MATRIXFLOAT2D
*
* @param[in] dst The destination matrix
* @param[in] src The source matrix. Can be NULL
* @param[in] tx, ty The x and y translation to apply
*
* @note In-place matrix operation is NOT allowed ie. dst != src
* @note If no source matrix is provided, it is equivalent to applying the operation
* to an identity matrix. It also is a much simpler operation requiring no multiplication.
*
* @api
*/
void gmiscMatrixFloat2DApplyTranslation(MatrixFloat2D *dst, const MatrixFloat2D *src, float tx, float ty);
/**
* @brief Add x,y scaling to a matrix
* @pre Requires GFX_USE_GMISC and GMISC_NEED_MATRIXFLOAT2D
*
* @param[in] dst The destination matrix
* @param[in] src The source matrix. Can be NULL
* @param[in] sx, sy The scaling to apply in the x and y direction. Negative numbers give reflection.
*
* @note In-place matrix operation is NOT allowed ie. dst != src
* @note If no source matrix is provided, it is equivalent to applying the operation
* to an identity matrix. It also is a much simpler operation requiring no multiplication.
*
* @api
*/
void gmiscMatrixFloat2DApplyScale(MatrixFloat2D *dst, const MatrixFloat2D *src, float sx, float sy);
/**
* @brief Add x,y shear to a matrix
* @pre Requires GFX_USE_GMISC and GMISC_NEED_MATRIXFLOAT2D
*
* @param[in] dst The destination matrix
* @param[in] src The source matrix. Can be NULL
* @param[in] sx, sy The shear to apply in the x and y direction.
*
* @note In-place matrix operation is NOT allowed ie. dst != src
* @note If no source matrix is provided, it is equivalent to applying the operation
* to an identity matrix. It also is a much simpler operation requiring no multiplication.
*
* @api
*/
void gmiscMatrixFloat2DApplyShear(MatrixFloat2D *dst, const MatrixFloat2D *src, float sx, float sy);
/**
* @brief Add rotation to a matrix
* @pre Requires GFX_USE_GMISC and GMISC_NEED_MATRIXFLOAT2D
*
* @param[in] dst The destination matrix
* @param[in] src The source matrix. Can be NULL
* @param[in] angle The angle to apply in degrees (not radians).
*
* @note In-place matrix operation is NOT allowed ie. dst != src
* @note If no source matrix is provided, it is equivalent to applying the operation
* to an identity matrix. It also is a much simpler operation.
* @note If GMISC_NEED_FASTTRIG is defined then the fast table sin and cos lookup's will be used
* rather than the C library versions.
*
* @api
*/
void gmiscMatrixFloat2DApplyRotation(MatrixFloat2D *dst, const MatrixFloat2D *src, int angle);
#endif
#if GMISC_NEED_MATRIXFIXED2D || defined(__DOXYGEN__)
/**
* @brief A matrix for doing 2D graphics using fixed point maths
* @pre Requires GFX_USE_GMISC and GMISC_NEED_MATRIXFIXED2D
*/
typedef struct MatrixFixed2D {
fixed a00, a01, a02;
fixed a10, a11, a12;
fixed a20, a21, a22;
} MatrixFixed2D;
/**
* @brief Apply the matrix to a set of points
* @pre Requires GFX_USE_GMISC and GMISC_NEED_MATRIXFIXED2D
*
* @param[in] dst The destination array of points
* @param[in] src The source array of points
* @param[in] m The matrix to apply
* @param[in] cnt How many points are in the array
*
* @note In-place matrix application is allowed ie. dst = src
*
* @api
*/
void gmiscMatrixFixed2DApplyToPoints(point *dst, const point *src, const MatrixFixed2D *m, int cnt);
/**
* @brief Set the 2D matrix to the identity matrix
* @pre Requires GFX_USE_GMISC and GMISC_NEED_MATRIXFIXED2D
*
* @param[in] m The matrix to set to identity
*
* @api
*/
void gmiscMatrixFixed2DSetIdentity(MatrixFixed2D *m);
/**
* @brief Multiple two 2D matrixes together
* @pre Requires GFX_USE_GMISC and GMISC_NEED_MATRIXFIXED2D
*
* @param[in] dst The destination matrix
* @param[in] src1 The first source matrix
* @param[in] src2 The second source matrix
*
* @note In-place matrix application is NOT allowed ie. dst != src1, dst != src2
*
* @api
*/
void gmiscMatrixFixed2DMultiply(MatrixFixed2D *dst, const MatrixFixed2D *src1, const MatrixFixed2D *src2);
/**
* @brief Add an x,y translation to a matrix
* @pre Requires GFX_USE_GMISC and GMISC_NEED_MATRIXFIXED2D
*
* @param[in] dst The destination matrix
* @param[in] src The source matrix. Can be NULL
* @param[in] tx, ty The x and y translation to apply
*
* @note In-place matrix operation is NOT allowed ie. dst != src
* @note If no source matrix is provided, it is equivalent to applying the operation
* to an identity matrix. It also is a much simpler operation requiring no multiplication.
*
* @api
*/
void gmiscMatrixFixed2DApplyTranslation(MatrixFixed2D *dst, const MatrixFixed2D *src, fixed tx, fixed ty);
/**
* @brief Add x,y scaling to a matrix
* @pre Requires GFX_USE_GMISC and GMISC_NEED_MATRIXFIXED2D
*
* @param[in] dst The destination matrix
* @param[in] src The source matrix. Can be NULL
* @param[in] sx, sy The scaling to apply in the x and y direction. Negative numbers give reflection.
*
* @note In-place matrix operation is NOT allowed ie. dst != src
* @note If no source matrix is provided, it is equivalent to applying the operation
* to an identity matrix. It also is a much simpler operation requiring no multiplication.
*
* @api
*/
void gmiscMatrixFixed2DApplyScale(MatrixFixed2D *dst, const MatrixFixed2D *src, fixed sx, fixed sy);
/**
* @brief Add x,y shear to a matrix
* @pre Requires GFX_USE_GMISC and GMISC_NEED_MATRIXFIXED2D
*
* @param[in] dst The destination matrix
* @param[in] src The source matrix. Can be NULL
* @param[in] sx, sy The shear to apply in the x and y direction.
*
* @note In-place matrix operation is NOT allowed ie. dst != src
* @note If no source matrix is provided, it is equivalent to applying the operation
* to an identity matrix. It also is a much simpler operation requiring no multiplication.
*
* @api
*/
void gmiscMatrixFixed2DApplyShear(MatrixFixed2D *dst, const MatrixFixed2D *src, fixed sx, fixed sy);
#if GMISC_NEED_FIXEDTRIG || defined(__DOXYGEN__)
/**
* @brief Add rotation to a matrix
* @pre Requires GFX_USE_GMISC and GMISC_NEED_MATRIXFIXED2D and GMISC_NEED_FIXEDTRIG
*
* @param[in] dst The destination matrix
* @param[in] src The source matrix. Can be NULL
* @param[in] angle The angle to apply in degrees (not radians).
*
* @note In-place matrix operation is NOT allowed ie. dst != src
* @note If no source matrix is provided, it is equivalent to applying the operation
* to an identity matrix. It also is a much simpler operation requiring no multiplication.
*
* @api
*/
void gmiscMatrixFixed2DApplyRotation(MatrixFixed2D *dst, const MatrixFixed2D *src, int angle);
#endif
#endif
#ifdef __cplusplus
}
#endif

1
src/gmisc/sys_make.mk
View file

@ -1,3 +1,4 @@
GFXSRC += $(GFXLIB)/src/gmisc/gmisc_gmisc.c \
$(GFXLIB)/src/gmisc/gmisc_arrayops.c \
$(GFXLIB)/src/gmisc/gmisc_matrix2d.c \
$(GFXLIB)/src/gmisc/gmisc_trig.c