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gx_display_driver_16bpp_pixelmap_rotate.c
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gx_display_driver_16bpp_pixelmap_rotate.c
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/**************************************************************************/
/* */
/* Copyright (c) Microsoft Corporation. All rights reserved. */
/* */
/* This software is licensed under the Microsoft Software License */
/* Terms for Microsoft Azure RTOS. Full text of the license can be */
/* found in the LICENSE file at https://aka.ms/AzureRTOS_EULA */
/* and in the root directory of this software. */
/* */
/**************************************************************************/
/**************************************************************************/
/**************************************************************************/
/** */
/** GUIX Component */
/** */
/** Display Management (Display) */
/** */
/**************************************************************************/
#define REDVAL(_c) (GX_UBYTE)(((_c) >> 11) & 0x1f)
#define GREENVAL(_c) (GX_UBYTE)(((_c) >> 5) & 0x3f)
#define BLUEVAL(_c) (GX_UBYTE)(((_c)) & 0x1f)
#define ASSEMBLECOLOR(_r, _g, _b) \
((((_r) & 0x1f) << 11) | \
(((_g) & 0x3f) << 5) | \
(((_b) & 0x1f)))
#define GX_SOURCE_CODE
/* Include necessary system files. */
#include "gx_api.h"
#include "gx_display.h"
#include "gx_context.h"
#include "gx_utility.h"
#include "gx_system.h"
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _gx_display_driver_565rgb_pixelmap_raw_rotate PORTABLE C */
/* 6.1 */
/* AUTHOR */
/* */
/* Kenneth Maxwell, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* Internal helper function that rotate an uncompressed pixelmap */
/* without alpha. */
/* */
/* INPUT */
/* */
/* context Drawing context */
/* xpos x-coord of top-left draw point*/
/* ypos y-coord of top-left draw point*/
/* pixelmap Pointer to GX_PIXELMAP struct */
/* angle The angle to rotate */
/* cx x-coord of rotate center */
/* cy y-coord of rotate center */
/* */
/* OUTPUT */
/* */
/* status Completion status */
/* */
/* CALLS */
/* */
/* _gx_utility_math_cos Compute the cosine value */
/* _gx_utility_math_sin Compute the sine value */
/* [gx_display_driver_pixel_blend] Display driver basic pixel */
/* blend function */
/* */
/* CALLED BY */
/* */
/* GUIX Internal Code */
/* */
/* RELEASE HISTORY */
/* */
/* DATE NAME DESCRIPTION */
/* */
/* 05-19-2020 Kenneth Maxwell Initial Version 6.0 */
/* 09-30-2020 Kenneth Maxwell Modified comment(s), */
/* resulting in version 6.1 */
/* */
/**************************************************************************/
static VOID _gx_display_driver_565rgb_pixelmap_raw_rotate(GX_DRAW_CONTEXT *context, INT xpos, INT ypos, GX_PIXELMAP *pixelmap,
INT angle, INT cx, INT cy)
{
USHORT *get;
INT srcxres;
INT srcyres;
INT cosv;
INT sinv;
INT alpha;
USHORT red;
USHORT green;
USHORT blue;
INT idxminx;
INT idxmaxx;
INT idxmaxy;
INT *mx;
INT *my;
INT xres;
INT yres;
INT x;
INT y;
INT xx;
INT yy;
USHORT a;
USHORT b;
USHORT c;
USHORT d;
INT xdiff;
INT ydiff;
INT newxpos;
INT newypos;
GX_DISPLAY *display;
GX_RECTANGLE *clip;
VOID (*blend_func)(GX_DRAW_CONTEXT *context, INT x, INT y, GX_COLOR color, GX_UBYTE alpha);
clip = context -> gx_draw_context_clip;
display = context -> gx_draw_context_display;
blend_func = display -> gx_display_driver_pixel_blend;
if (!blend_func)
{
return;
}
mx = _gx_system_scratchpad;
my = mx + 4;
mx[0] = mx[3] = -1;
mx[1] = mx[2] = 1;
my[0] = my[1] = 1;
my[2] = my[3] = -1;
idxminx = (angle / 90) & 0x3;
idxmaxx = (idxminx + 2) & 0x3;
idxmaxy = (idxminx + 1) & 0x3;
/* Calculate the source x and y center. */
srcxres = pixelmap -> gx_pixelmap_width >> 1;
srcyres = pixelmap -> gx_pixelmap_height >> 1;
cosv = _gx_utility_math_cos(GX_FIXED_VAL_MAKE(angle));
sinv = _gx_utility_math_sin(GX_FIXED_VAL_MAKE(angle));
xres = GX_FIXED_VAL_TO_INT(mx[idxmaxx] * (srcxres + 2) * cosv - my[idxmaxx] * (srcyres + 2) * sinv);
yres = GX_FIXED_VAL_TO_INT(my[idxmaxy] * (srcyres + 2) * cosv + mx[idxmaxy] * (srcxres + 2) * sinv);
/* Calculate the new rotation axis. */
x = GX_FIXED_VAL_TO_INT((cx - srcxres) * cosv - (cy - srcyres) * sinv);
y = GX_FIXED_VAL_TO_INT((cy - srcyres) * cosv + (cx - srcxres) * sinv);
x += xres;
y += yres;
newxpos = xpos + cx - x;
newypos = ypos + cy - y;
/* Loop through the destination's pixels. */
for (y = clip -> gx_rectangle_top - newypos; y <= clip -> gx_rectangle_bottom - newypos; y++)
{
for (x = clip -> gx_rectangle_left - newxpos; x <= clip -> gx_rectangle_right - newxpos; x++)
{
xx = (x - xres) * cosv + (y - yres) * sinv;
yy = (y - yres) * cosv - (x - xres) * sinv;
xdiff = GX_FIXED_VAL_TO_INT(xx << 8) & 0xff;
ydiff = GX_FIXED_VAL_TO_INT(yy << 8) & 0xff;
xx = GX_FIXED_VAL_TO_INT(xx) + srcxres;
yy = GX_FIXED_VAL_TO_INT(yy) + srcyres;
if ((xx >= -1) && (xx < pixelmap -> gx_pixelmap_width) &&
(yy >= -1) && (yy < pixelmap -> gx_pixelmap_height))
{
if ((xx >= 0) && (xx < pixelmap -> gx_pixelmap_width - 1) &&
(yy >= 0) && (yy < pixelmap -> gx_pixelmap_height - 1))
{
get = (USHORT *)pixelmap -> gx_pixelmap_data;
get += yy * pixelmap -> gx_pixelmap_width;
get += xx;
a = *get;
b = *(get + 1);
c = *(get + pixelmap -> gx_pixelmap_width);
d = *(get + pixelmap -> gx_pixelmap_width + 1);
alpha = 0xff;
}
else
{
get = (USHORT *)pixelmap -> gx_pixelmap_data;
a = 0;
b = 0;
c = 0;
d = 0;
alpha = 0;
if (xx == -1)
{
/* handle left edge. */
if (yy >= 0)
{
b = *(get + yy * pixelmap -> gx_pixelmap_width);
alpha += xdiff * (256 - ydiff);
}
if (yy < pixelmap -> gx_pixelmap_height - 1)
{
d = *(get + (yy + 1) * pixelmap -> gx_pixelmap_width);
alpha += xdiff * ydiff;
}
}
else if (yy == -1)
{
/* handle top edge. */
c = *(get + xx);
alpha += ydiff * (256 - xdiff);
if (xx < pixelmap -> gx_pixelmap_width - 1)
{
d = *(get + xx + 1);
alpha += xdiff * ydiff;
}
}
else if (xx == pixelmap -> gx_pixelmap_width - 1)
{
/* handle right edge. */
a = *(get + yy * pixelmap -> gx_pixelmap_width + xx);
alpha += (256 - xdiff) * (256 - ydiff);
if (yy < pixelmap -> gx_pixelmap_height - 1)
{
c = *(get + (yy + 1) * pixelmap -> gx_pixelmap_width + xx);
alpha += ydiff * (256 - xdiff);
}
}
else
{
/* handle bottom edge. */
a = *(get + yy * pixelmap -> gx_pixelmap_width + xx);
alpha += (256 - xdiff) * (256 - ydiff);
b = *(get + yy * pixelmap -> gx_pixelmap_width + xx + 1);
alpha += xdiff * (256 - ydiff);
}
alpha >>= 8;
}
red = (USHORT)((REDVAL(a) * (256 - xdiff) * (256 - ydiff) +
REDVAL(b) * xdiff * (256 - ydiff) +
REDVAL(c) * ydiff * (256 - xdiff) +
REDVAL(d) * xdiff * ydiff) >> 16);
green = (USHORT)((GREENVAL(a) * (256 - xdiff) * (256 - ydiff) +
GREENVAL(b) * xdiff * (256 - ydiff) +
GREENVAL(c) * ydiff * (256 - xdiff) +
GREENVAL(d) * xdiff * ydiff) >> 16);
blue = (USHORT)((BLUEVAL(a) * (256 - xdiff) * (256 - ydiff) +
BLUEVAL(b) * xdiff * (256 - ydiff) +
BLUEVAL(c) * ydiff * (256 - xdiff) +
BLUEVAL(d) * xdiff * ydiff) >> 16);
if ((alpha > 0) && (alpha < 0xff))
{
red = (USHORT)((red << 8) / alpha);
green = (USHORT)((green << 8) / alpha);
blue = (USHORT)((blue << 8) / alpha);
}
red = red > 31 ? 31 : red;
green = green > 63 ? 63 : green;
blue = blue > 31 ? 31 : blue;
alpha = alpha > 255 ? 255 : alpha;
blend_func(context, x + newxpos, y + newypos, (GX_COLOR)ASSEMBLECOLOR(red, green, blue), (GX_UBYTE)alpha);
}
}
}
}
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _gx_display_driver_565rgb_pixelmap_alpha_rotate PORTABLE C */
/* 6.1 */
/* AUTHOR */
/* */
/* Kenneth Maxwell, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* Internal helper function that rotate an uncompressed pixelmap */
/* with alpha. */
/* */
/* INPUT */
/* */
/* context Drawing context */
/* xpos x-coord of top-left draw point*/
/* ypos y-coord of top-left draw point*/
/* pixelmap Pointer to GX_PIXELMAP struct */
/* angle The angle to rotate */
/* cx x-coord of rotate center */
/* cy y-coord of rotate center */
/* */
/* OUTPUT */
/* */
/* status Completion status */
/* */
/* CALLS */
/* */
/* _gx_utility_math_cos Compute the cosine value */
/* _gx_utility_math_sin Compute the sine value */
/* [gx_display_driver_pixel_blend] Display driver basic pixel */
/* blend function */
/* */
/* CALLED BY */
/* */
/* GUIX Internal Code */
/* */
/* RELEASE HISTORY */
/* */
/* DATE NAME DESCRIPTION */
/* */
/* 05-19-2020 Kenneth Maxwell Initial Version 6.0 */
/* 09-30-2020 Kenneth Maxwell Modified comment(s), */
/* resulting in version 6.1 */
/* */
/**************************************************************************/
static VOID _gx_display_driver_565rgb_pixelmap_alpha_rotate(GX_DRAW_CONTEXT *context, INT xpos, INT ypos, GX_PIXELMAP *pixelmap,
INT angle, INT cx, INT cy)
{
USHORT *get;
GX_UBYTE *getalpha;
INT srcxres;
INT srcyres;
INT cosv;
INT sinv;
USHORT red;
USHORT green;
USHORT blue;
INT idxminx;
INT idxmaxx;
INT idxmaxy;
INT *mx;
INT *my;
INT xres;
INT yres;
INT x;
INT y;
INT xx;
INT yy;
USHORT a;
USHORT b;
USHORT c;
USHORT d;
USHORT alpha[4];
GX_FIXED_VAL xdiff;
GX_FIXED_VAL ydiff;
INT newxpos;
INT newypos;
GX_DISPLAY *display;
GX_RECTANGLE *clip;
VOID (*blend_func)(GX_DRAW_CONTEXT *context, INT x, INT y, GX_COLOR color, GX_UBYTE alpha);
clip = context -> gx_draw_context_clip;
display = context -> gx_draw_context_display;
blend_func = display -> gx_display_driver_pixel_blend;
if (!blend_func)
{
return;
}
mx = _gx_system_scratchpad;
my = mx + 4;
mx[0] = mx[3] = -1;
mx[1] = mx[2] = 1;
my[0] = my[1] = 1;
my[2] = my[3] = -1;
idxminx = (angle / 90) & 0x3;
idxmaxx = (idxminx + 2) & 0x3;
idxmaxy = (idxminx + 1) & 0x3;
/* Calculate the source x and y center. */
srcxres = pixelmap -> gx_pixelmap_width >> 1;
srcyres = pixelmap -> gx_pixelmap_height >> 1;
cosv = _gx_utility_math_cos(GX_FIXED_VAL_MAKE(angle));
sinv = _gx_utility_math_sin(GX_FIXED_VAL_MAKE(angle));
xres = GX_FIXED_VAL_TO_INT(mx[idxmaxx] * (srcxres + 2) * cosv - my[idxmaxx] * (srcyres + 2) * sinv);
yres = GX_FIXED_VAL_TO_INT(my[idxmaxy] * (srcyres + 2) * cosv + mx[idxmaxy] * (srcxres + 2) * sinv);
x = GX_FIXED_VAL_TO_INT((cx - srcxres) * cosv - (cy - srcyres) * sinv);
y = GX_FIXED_VAL_TO_INT((cy - srcyres) * cosv + (cx - srcxres) * sinv);
x += xres;
y += yres;
newxpos = xpos + cx - x;
newypos = ypos + cy - y;
/* Loop through the source's pixels. */
for (y = clip -> gx_rectangle_top - newypos; y <= clip -> gx_rectangle_bottom - newypos; y++)
{
for (x = clip -> gx_rectangle_left - newxpos; x <= clip -> gx_rectangle_right - newxpos; x++)
{
xx = (x - xres) * cosv + (y - yres) * sinv;
yy = (y - yres) * cosv - (x - xres) * sinv;
xdiff = GX_FIXED_VAL_TO_INT(xx << 8) & 0xff;
ydiff = GX_FIXED_VAL_TO_INT(yy << 8) & 0xff;
xx = GX_FIXED_VAL_TO_INT(xx);
yy = GX_FIXED_VAL_TO_INT(yy);
xx += srcxres;
yy += srcyres;
if ((xx >= -1) && (xx < pixelmap -> gx_pixelmap_width) &&
(yy >= -1) && (yy < pixelmap -> gx_pixelmap_height))
{
if ((xx >= 0) && (xx < pixelmap -> gx_pixelmap_width - 1) && \
(yy >= 0) && (yy < pixelmap -> gx_pixelmap_height - 1))
{
get = (USHORT *)pixelmap -> gx_pixelmap_data;
get += yy * pixelmap -> gx_pixelmap_width;
get += xx;
getalpha = (GX_UBYTE *)pixelmap -> gx_pixelmap_aux_data;
getalpha += yy * pixelmap -> gx_pixelmap_width;
getalpha += xx;
a = *get;
alpha[0] = *getalpha;
b = *(get + 1);
alpha[1] = *(getalpha + 1);
c = *(get + pixelmap -> gx_pixelmap_width);
alpha[2] = *(getalpha + pixelmap -> gx_pixelmap_width);
d = *(get + pixelmap -> gx_pixelmap_width + 1);
alpha[3] = *(getalpha + pixelmap -> gx_pixelmap_width + 1);
}
else
{
get = (USHORT *)pixelmap -> gx_pixelmap_data;
getalpha = (GX_UBYTE *)pixelmap -> gx_pixelmap_aux_data;
a = 0;
b = 0;
c = 0;
d = 0;
if (xx == -1)
{
/* handle left edge. */
if (yy >= 0)
{
b = *(get + yy * pixelmap -> gx_pixelmap_width);
alpha[1] = *(getalpha + yy * pixelmap -> gx_pixelmap_width);
}
if (yy < pixelmap -> gx_pixelmap_height - 1)
{
d = *(get + (yy + 1) * pixelmap -> gx_pixelmap_width);
alpha[3] = *(getalpha + (yy + 1) * pixelmap -> gx_pixelmap_width);
}
}
else if (yy == -1)
{
/* handle top edge. */
c = *(get + xx);
alpha[2] = *(getalpha + xx);
if (xx < pixelmap -> gx_pixelmap_width - 1)
{
d = *(get + xx + 1);
alpha[3] = *(getalpha + xx + 1);
}
}
else if (xx == pixelmap -> gx_pixelmap_width - 1)
{
/* handle right edget. */
a = *(get + yy * pixelmap -> gx_pixelmap_width + xx);
alpha[0] = *(getalpha + yy * pixelmap -> gx_pixelmap_width + xx);
if (yy < pixelmap -> gx_pixelmap_height - 1)
{
c = *(get + (yy + 1) * pixelmap -> gx_pixelmap_width + xx);
alpha[2] = *(getalpha + (yy + 1) * pixelmap -> gx_pixelmap_width + xx);
}
}
else
{
/* handle bottom edge. */
a = *(get + yy * pixelmap -> gx_pixelmap_width + xx);
alpha[0] = *(getalpha + yy * pixelmap -> gx_pixelmap_width + xx);
b = *(get + yy * pixelmap -> gx_pixelmap_width + xx + 1);
alpha[1] = *(getalpha + yy * pixelmap -> gx_pixelmap_width + xx + 1);
}
if (!a)
{
alpha[0] = 0;
}
if (!b)
{
alpha[1] = 0;
}
if (!c)
{
alpha[2] = 0;
}
if (!d)
{
alpha[3] = 0;
}
}
red = (USHORT)((REDVAL(a) * alpha[0] * (256 - xdiff) * (256 - ydiff) +
REDVAL(b) * alpha[1] * xdiff * (256 - ydiff) +
REDVAL(c) * alpha[2] * ydiff * (256 - xdiff) +
REDVAL(d) * alpha[3] * xdiff * ydiff) >> 16);
green = (USHORT)((GREENVAL(a) * alpha[0] * (256 - xdiff) * (256 - ydiff) +
GREENVAL(b) * alpha[1] * xdiff * (256 - ydiff) +
GREENVAL(c) * alpha[2] * ydiff * (256 - xdiff) +
GREENVAL(d) * alpha[3] * xdiff * ydiff) >> 16);
blue = (USHORT)((BLUEVAL(a) * alpha[0] * (256 - xdiff) * (256 - ydiff) +
BLUEVAL(b) * alpha[1] * xdiff * (256 - ydiff) +
BLUEVAL(c) * alpha[2] * ydiff * (256 - xdiff) +
BLUEVAL(d) * alpha[3] * xdiff * ydiff) >> 16);
alpha[0] = (USHORT)((alpha[0] * (256 - xdiff) * (256 - ydiff) +
alpha[1] * xdiff * (256 - ydiff) +
alpha[2] * ydiff * (256 - xdiff) +
alpha[3] * xdiff * ydiff) >> 16);
if (alpha[0])
{
red /= alpha[0];
green /= alpha[0];
blue /= alpha[0];
}
red = red > 31 ? 31 : red;
green = green > 63 ? 63 : green;
blue = blue > 31 ? 31 : blue;
alpha[0] = alpha[0] > 255 ? 255 : alpha[0];
blend_func(context, x + newxpos, y + newypos, (GX_COLOR)ASSEMBLECOLOR(red, green, blue), (GX_UBYTE)alpha[0]);
}
}
}
}
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _gx_display_driver_16bpp_pixelmap_simple_rotate PORTABLE C */
/* 6.1 */
/* AUTHOR */
/* */
/* Kenneth Maxwell, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* Internal help function that hangles 90, 180 and 270 degree pixelmap */
/* rotation. */
/* */
/* INPUT */
/* */
/* context Drawing context */
/* xpos x-coord of top-left draw point*/
/* ypos y-coord of top-left draw point*/
/* pixelmap Pointer to GX_PIXELMAP struct */
/* angle The angle to rotate */
/* cx x-coord of rotate center */
/* cy y-coord of rotate center */
/* */
/* OUTPUT */
/* */
/* status Completion status */
/* */
/* CALLS */
/* */
/* None */
/* */
/* CALLED BY */
/* */
/* GUIX Internal Code */
/* */
/* RELEASE HISTORY */
/* */
/* DATE NAME DESCRIPTION */
/* */
/* 05-19-2020 Kenneth Maxwell Initial Version 6.0 */
/* 09-30-2020 Kenneth Maxwell Modified comment(s), */
/* resulting in version 6.1 */
/* */
/**************************************************************************/
VOID _gx_display_driver_16bpp_pixelmap_simple_rotate(GX_DRAW_CONTEXT *context, INT xpos, INT ypos, GX_PIXELMAP *pixelmap,
INT angle, INT cx, INT cy)
{
USHORT *putrow;
USHORT *put;
USHORT *get;
INT width;
INT height;
INT x;
INT y;
GX_RECTANGLE *clip;
INT newxpos;
INT newypos;
clip = context -> gx_draw_context_clip;
if (angle == 90)
{
width = pixelmap -> gx_pixelmap_height;
height = pixelmap -> gx_pixelmap_width;
newxpos = xpos + cx - (width - 1 - cy);
newypos = ypos + cy - cx;
putrow = (USHORT *)context -> gx_draw_context_memory;
putrow += clip -> gx_rectangle_top * context -> gx_draw_context_pitch;
putrow += clip -> gx_rectangle_left;
for (y = clip -> gx_rectangle_top - newypos; y <= clip -> gx_rectangle_bottom - newypos; y++)
{
put = putrow;
for (x = clip -> gx_rectangle_left - newxpos; x <= clip -> gx_rectangle_right - newxpos; x++)
{
get = (USHORT *)pixelmap -> gx_pixelmap_data;
get += (width - 1 - x) * height;
get += y;
*put++ = *get;
}
putrow += context -> gx_draw_context_pitch;
}
}
else if (angle == 180)
{
width = pixelmap -> gx_pixelmap_width;
height = pixelmap -> gx_pixelmap_height;
newxpos = xpos + cx - (width - 1 - cx);
newypos = ypos + cy - (height - 1 - cy);
putrow = (USHORT *)context -> gx_draw_context_memory;
putrow += clip -> gx_rectangle_top * context -> gx_draw_context_pitch;
putrow += clip -> gx_rectangle_left;
for (y = clip -> gx_rectangle_top - newypos; y <= clip -> gx_rectangle_bottom - newypos; y++)
{
put = putrow;
for (x = clip -> gx_rectangle_left - newxpos; x <= clip -> gx_rectangle_right - newxpos; x++)
{
get = (USHORT *)pixelmap -> gx_pixelmap_data;
get += (height - 1 - y) * width;
get += width - 1 - x;
*put++ = *get;
}
putrow += context -> gx_draw_context_pitch;
}
}
else
{
width = pixelmap -> gx_pixelmap_height;
height = pixelmap -> gx_pixelmap_width;
newxpos = xpos + cx - cy;
newypos = ypos + cx - (height - 1 - cy);
putrow = (USHORT *)context -> gx_draw_context_memory;
putrow += clip -> gx_rectangle_top * context -> gx_draw_context_pitch;
putrow += clip -> gx_rectangle_left;
for (y = clip -> gx_rectangle_top - newypos; y <= clip -> gx_rectangle_bottom - newypos; y++)
{
put = putrow;
for (x = clip -> gx_rectangle_left - newxpos; x <= clip -> gx_rectangle_right - newxpos; x++)
{
get = (USHORT *)pixelmap -> gx_pixelmap_data;
get += x * height;
get += height - 1 - y;
*put++ = *get;
}
putrow += context -> gx_draw_context_pitch;
}
}
}
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _gx_display_driver_16bpp_pixelmap_simple_alpha_rotate */
/* PORTABLE C */
/* 6.1 */
/* AUTHOR */
/* */
/* Kenneth Maxwell, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* Internal help function that hangles 90, 180 and 270 degree pixelmap */
/* rotation with alpha channel. */
/* */
/* INPUT */
/* */
/* context Drawing context */
/* xpos x-coord of top-left draw point*/
/* ypos y-coord of top-left draw point*/
/* pixelmap Pointer to GX_PIXELMAP struct */
/* angle The angle to rotate */
/* cx x-coord of rotate center */
/* cy y-coord of rotate center */
/* */
/* OUTPUT */
/* */
/* status Completion status */
/* */
/* CALLS */
/* */
/* [gx_display_driver_pixel_blend] Display driver basic pixel */
/* blend function */
/* */
/* CALLED BY */
/* */
/* GUIX Internal Code */
/* */
/* RELEASE HISTORY */
/* */
/* DATE NAME DESCRIPTION */
/* */
/* 05-19-2020 Kenneth Maxwell Initial Version 6.0 */
/* 09-30-2020 Kenneth Maxwell Modified comment(s), */
/* resulting in version 6.1 */
/* */
/**************************************************************************/
VOID _gx_display_driver_16bpp_pixelmap_simple_alpha_rotate(GX_DRAW_CONTEXT *context, INT xpos, INT ypos, GX_PIXELMAP *pixelmap,
INT angle, INT cx, INT cy)
{
USHORT *get;
GX_UBYTE *getalpha;
INT width;
INT height;
INT x;
INT y;
GX_RECTANGLE *clip;
INT newxpos;
INT newypos;
VOID (*blend_func)(GX_DRAW_CONTEXT *context, INT x, INT y, GX_COLOR color, GX_UBYTE alpha);
clip = context -> gx_draw_context_clip;
blend_func = context -> gx_draw_context_display -> gx_display_driver_pixel_blend;
if (GX_NULL == blend_func)
{
return;
}
if (angle == 90)
{
width = pixelmap -> gx_pixelmap_height;
height = pixelmap -> gx_pixelmap_width;
newxpos = xpos + cx - (width - 1 - cy);
newypos = ypos + cy - cx;
for (y = clip -> gx_rectangle_top - newypos; y <= clip -> gx_rectangle_bottom - newypos; y++)
{
for (x = clip -> gx_rectangle_left - newxpos; x <= clip -> gx_rectangle_right - newxpos; x++)
{
get = (USHORT *)pixelmap -> gx_pixelmap_data;
getalpha = (GX_UBYTE *)pixelmap -> gx_pixelmap_aux_data;
get += (width - 1 - x) * height;
get += y;
getalpha += (width - 1 - x) * height;
getalpha += y;
blend_func(context, x + newxpos, y + newypos, *get, *getalpha);
}
}
}
else if (angle == 180)
{
width = pixelmap -> gx_pixelmap_width;
height = pixelmap -> gx_pixelmap_height;
newxpos = xpos + cx - (width - 1 - cx);
newypos = ypos + cy - (height - 1 - cy);
for (y = clip -> gx_rectangle_top - newypos; y <= clip -> gx_rectangle_bottom - newypos; y++)
{
for (x = clip -> gx_rectangle_left - newxpos; x <= clip -> gx_rectangle_right - newxpos; x++)
{
get = (USHORT *)pixelmap -> gx_pixelmap_data;
getalpha = (GX_UBYTE *)pixelmap -> gx_pixelmap_aux_data;
get += (height - 1 - y) * width;
get += width - 1 - x;
getalpha += (height - 1 - y) * width;
getalpha += width - 1 - x;
blend_func(context, x + newxpos, y + newypos, *get, *getalpha);
}
}
}
else
{
width = pixelmap -> gx_pixelmap_height;
height = pixelmap -> gx_pixelmap_width;
newxpos = xpos + cx - cy;
newypos = ypos + cx - (height - 1 - cy);
for (y = clip -> gx_rectangle_top - newypos; y <= clip -> gx_rectangle_bottom - newypos; y++)
{
for (x = clip -> gx_rectangle_left - newxpos; x <= clip -> gx_rectangle_right - newxpos; x++)
{
get = (USHORT *)pixelmap -> gx_pixelmap_data;
getalpha = (GX_UBYTE *)pixelmap -> gx_pixelmap_aux_data;
get += x * height;
get += height - 1 - y;
getalpha += x * height;
getalpha += height - 1 - y;
blend_func(context, x + newxpos, y + newypos, *get, *getalpha);
}
}
}
}
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _gx_display_driver_16bpp_pixelmap_rotate PORTABLE C */
/* 6.1 */
/* AUTHOR */
/* */
/* Kenneth Maxwell, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This service rotate a pixelmap directly to canvas memory. */
/* */
/* INPUT */
/* */
/* context Drawing context */
/* xpos x-coord of top-left draw point*/
/* ypos y-coord of top-left draw point*/
/* pixelmap Pointer to GX_PIXELMAP struct */
/* angle The angle to rotate */
/* rot_cx x-coord of rotating center. */
/* rot_cy y-coord of rotationg center. */
/* */
/* OUTPUT */
/* */
/* status Completion status */
/* */
/* CALLS */
/* */
/* _gx_display_driver_16bpp_pixelmap_simple_alpha_rotate */
/* Real rotate functin */
/* _gx_display_driver_16bpp_pixelmap_simple_rotate */
/* Real rotate functin */
/* _gx_display_driver_565rgb_pixelmap_alpha_rotate */
/* Real rotate functin */
/* _gx_display_driver_565rgb_pixelmap_raw_rotate */
/* Real rotate functin */
/* */
/* CALLED BY */
/* */
/* Application Code */
/* GUIX Internal Code */
/* */
/* RELEASE HISTORY */
/* */
/* DATE NAME DESCRIPTION */
/* */
/* 05-19-2020 Kenneth Maxwell Initial Version 6.0 */
/* 09-30-2020 Kenneth Maxwell Modified comment(s), */
/* added 565bgr format support,*/
/* resulting in version 6.1 */
/* */
/**************************************************************************/
VOID _gx_display_driver_16bpp_pixelmap_rotate(GX_DRAW_CONTEXT *context, INT xpos, INT ypos, GX_PIXELMAP *pixelmap,
INT angle, INT rot_cx, INT rot_cy)
{
switch (pixelmap -> gx_pixelmap_format)
{
case GX_COLOR_FORMAT_565RGB:
case GX_COLOR_FORMAT_565BGR:
if (angle % 90 == 0)
{
/* Simple angle rotate: 90 degree, 180 degree and 270 degree. */
if (pixelmap -> gx_pixelmap_flags & GX_PIXELMAP_ALPHA)
{
_gx_display_driver_16bpp_pixelmap_simple_alpha_rotate(context, xpos, ypos, pixelmap, angle, rot_cx, rot_cy);
}
else
{
_gx_display_driver_16bpp_pixelmap_simple_rotate(context, xpos, ypos, pixelmap, angle, rot_cx, rot_cy);
}
break;
}
else
{
/* General rotation case. */
if (pixelmap -> gx_pixelmap_flags & GX_PIXELMAP_ALPHA)
{
/* alpha, no compression */
_gx_display_driver_565rgb_pixelmap_alpha_rotate(context, xpos, ypos, pixelmap, angle, rot_cx, rot_cy);
}
else
{
/* no compression or alpha */
_gx_display_driver_565rgb_pixelmap_raw_rotate(context, xpos, ypos, pixelmap, angle, rot_cx, rot_cy);
}
break;
}
}
return;
}