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7f0aa32d51
scummvm/graphics/VectorRenderer.cpp
Vicent Marti 7f0aa32d51 Improved text handling. 
Fixed About dialog scroll-out text.

svn-id: r33257
2008-07-23 22:32:00 +00:00

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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* 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.
*
* $URL$
* $Id$
*
*/
#include "common/util.h"
#include "common/system.h"
#include "common/events.h"
#include "graphics/surface.h"
#include "graphics/colormasks.h"
#include "gui/ThemeRenderer.h"
#include "graphics/VectorRenderer.h"
#define VECTOR_RENDERER_FAST_TRIANGLES
namespace Graphics {
VectorRenderer *createRenderer(int mode) {
switch (mode) {
case GUI::ThemeRenderer::kGfxStandard16bit:
return new VectorRendererSpec<uint16, ColorMasks<565> >;
case GUI::ThemeRenderer::kGfxAntialias16bit:
return new VectorRendererAA<uint16, ColorMasks<565> >;
default:
return 0;
}
}
/********************************************************************
* DRAWSTEP handling functions
********************************************************************/
void VectorRenderer::drawStep(const Common::Rect &area, const DrawStep &step, uint32 extra) {
if (step.bgColor.set)
setBgColor(step.bgColor.r, step.bgColor.g, step.bgColor.b);
if (step.fgColor.set)
setFgColor(step.fgColor.r, step.fgColor.g, step.fgColor.b);
if (step.gradColor1.set && step.gradColor2.set)
setGradientColors(step.gradColor1.r, step.gradColor1.g, step.gradColor1.b,
step.gradColor2.r, step.gradColor2.g, step.gradColor2.b);
setShadowOffset(_disableShadows ? 0 : step.shadow);
setGradientFactor(step.factor);
setStrokeWidth(step.stroke);
setFillMode((FillMode)step.fillMode);
_dynamicData = extra;
(this->*(step.drawingCall))(area, step);
}
int VectorRenderer::stepGetRadius(const DrawStep &step, const Common::Rect &area) {
int radius = 0;
if (step.radius == 0xFF)
radius = MIN(area.width(), area.height()) / 2;
else
radius = step.radius;
if (step.scale != (1 << 16) && step.scale != 0)
radius = (radius * step.scale) >> 16;
return radius;
}
void VectorRenderer::stepGetPositions(const DrawStep &step, const Common::Rect &area, uint16 &in_x, uint16 &in_y, uint16 &in_w, uint16 &in_h) {
if (!step.autoWidth) {
in_w = step.w == -1 ? area.height() : step.w;
switch(step.xAlign) {
case Graphics::DrawStep::kVectorAlignManual:
if (step.x >= 0) in_x = area.left + step.x;
else in_x = area.left + area.width() + step.x; // value relative to the opposite corner.
break;
case Graphics::DrawStep::kVectorAlignCenter:
in_x = area.left + (area.width() / 2) - (in_w / 2);
break;
case Graphics::DrawStep::kVectorAlignLeft:
in_x = area.left;
break;
case Graphics::DrawStep::kVectorAlignRight:
in_x = area.left + area.width() - in_w;
break;
default:
error("Vertical alignment in horizontal data.");
}
} else {
in_x = area.left;
in_w = area.width();
}
if (!step.autoHeight) {
in_h = step.h == -1 ? area.width() : step.h;
switch(step.yAlign) {
case Graphics::DrawStep::kVectorAlignManual:
if (step.y >= 0) in_y = area.top + step.y;
else in_y = area.top + area.height() + step.y; // relative
break;
case Graphics::DrawStep::kVectorAlignCenter:
in_y = area.top + (area.height() / 2) - (in_h / 2);
break;
case Graphics::DrawStep::kVectorAlignTop:
in_y = area.top;
break;
case Graphics::DrawStep::kVectorAlignBottom:
in_y = area.top + area.height() - in_h;
break;
default:
error("Horizontal alignment in vertical data.");
}
} else {
in_y = area.top;
in_h = area.height();
}
if (step.scale != (1 << 16) && step.scale != 0) {
in_x = (in_x * step.scale) >> 16;
in_y = (in_y * step.scale) >> 16;
in_w = (in_w * step.scale) >> 16;
in_h = (in_h * step.scale) >> 16;
}
}
/********************************************************************
* MISCELANEOUS functions
********************************************************************/
/** Fixed point SQUARE ROOT **/
inline uint32 fp_sqroot(uint32 x) {
register uint32 root, remHI, remLO, testDIV, count;
root = 0;
remHI = 0;
remLO = x;
count = 23;
do {
remHI = (remHI << 2) | (remLO >> 30);
remLO <<= 2;
root <<= 1;
testDIV = (root << 1) + 1;
if (remHI >= testDIV) {
remHI -= testDIV;
root++;
}
} while (count--);
return root;
}
/** HELPER MACROS for BESENHALM's circle drawing algorithm **/
#define __BE_ALGORITHM() { \
if (f >= 0) { \
y--; \
ddF_y += 2; \
f += ddF_y; \
py -= pitch; \
} \
px += pitch; \
ddF_x += 2; \
f += ddF_x + 1; \
}
#define __BE_DRAWCIRCLE(ptr1,ptr2,ptr3,ptr4,x,y,px,py) { \
*(ptr1 + (y) - (px)) = color; \
*(ptr1 + (x) - (py)) = color; \
*(ptr2 - (x) - (py)) = color; \
*(ptr2 - (y) - (px)) = color; \
*(ptr3 - (y) + (px)) = color; \
*(ptr3 - (x) + (py)) = color; \
*(ptr4 + (x) + (py)) = color; \
*(ptr4 + (y) + (px)) = color; \
}
#define __BE_DRAWCIRCLE_XCOLOR(ptr1,ptr2,ptr3,ptr4,x,y,px,py) { \
*(ptr1 + (y) - (px)) = color1; \
*(ptr1 + (x) - (py)) = color2; \
*(ptr2 - (x) - (py)) = color2; \
*(ptr2 - (y) - (px)) = color1; \
*(ptr3 - (y) + (px)) = color3; \
*(ptr3 - (x) + (py)) = color4; \
*(ptr4 + (x) + (py)) = color4; \
*(ptr4 + (y) + (px)) = color3; \
}
#define __BE_RESET() { \
f = 1 - r; \
ddF_x = 0; ddF_y = -2 * r; \
x = 0; y = r; px = 0; py = pitch * r; \
}
/** HELPER MACROS for WU's circle drawing algorithm **/
#define __WU_DRAWCIRCLE(ptr1,ptr2,ptr3,ptr4,x,y,px,py,a) { \
blendPixelPtr(ptr1 + (y) - (px), color, a); \
blendPixelPtr(ptr1 + (x) - (py), color, a); \
blendPixelPtr(ptr2 - (x) - (py), color, a); \
blendPixelPtr(ptr2 - (y) - (px), color, a); \
blendPixelPtr(ptr3 - (y) + (px), color, a); \
blendPixelPtr(ptr3 - (x) + (py), color, a); \
blendPixelPtr(ptr4 + (x) + (py), color, a); \
blendPixelPtr(ptr4 + (y) + (px), color, a); \
}
#define __WU_ALGORITHM() { \
oldT = T; \
T = fp_sqroot(rsq - ((y * y) << 16)) ^ 0xFFFF; \
py += p; \
if (T < oldT) { \
x--; px -= p; \
} \
a2 = (T >> 8); \
a1 = ~a2; \
}
#define __TRIANGLE_MAINX() \
if (error_term >= 0) { \
ptr_right += pitch; \
ptr_left += pitch; \
error_term += dysub; \
} else { \
error_term += ddy; \
} \
ptr_right++; \
ptr_left--;
#define __TRIANGLE_MAINY() \
if (error_term >= 0) { \
ptr_right++; \
ptr_left--; \
error_term += dxsub; \
} else { \
error_term += ddx; \
} \
ptr_right += pitch; \
ptr_left += pitch;
/********************************************************************
* Primitive shapes drawing - Public API calls - VectorRendererSpec
********************************************************************/
template <typename PixelType, typename PixelFormat>
void VectorRendererSpec<PixelType, PixelFormat>::
drawString(const Graphics::Font *font, const Common::String &text, const Common::Rect &area,
GUI::Theme::TextAlign alignH, GUI::Theme::TextAlignVertical alignV, int deltax) {
int offset = 0;
switch (alignV) {
case GUI::Theme::kTextAlignVCenter:
offset = area.top + (area.height() - font->getFontHeight()) / 2;
break;
case GUI::Theme::kTextAlignVBottom:
offset = area.bottom - font->getFontHeight();
break;
case GUI::Theme::kTextAlignVTop:
offset = area.top;
break;
}
font->drawString(_activeSurface, text, area.left, offset, area.width(), _fgColor, (Graphics::TextAlignment)alignH, deltax, false);
}
/** LINES **/
template<typename PixelType, typename PixelFormat>
void VectorRendererSpec<PixelType, PixelFormat>::
drawLine(int x1, int y1, int x2, int y2) {
x1 = CLIP(x1, 0, (int)Base::_activeSurface->w);
x2 = CLIP(x2, 0, (int)Base::_activeSurface->w);
y1 = CLIP(y1, 0, (int)Base::_activeSurface->h);
y2 = CLIP(y2, 0, (int)Base::_activeSurface->h);
// we draw from top to bottom
if (y2 < y1) {
SWAP(x1, x2);
SWAP(y1, y2);
}
int dx = ABS(x2 - x1);
int dy = ABS(y2 - y1);
// this is a point, not a line. stoopid.
if (dy == 0 && dx == 0)
return;
if (Base::_strokeWidth == 0)
return;
PixelType *ptr = (PixelType *)_activeSurface->getBasePtr(x1, y1);
int pitch = Base::surfacePitch();
if (dy == 0) { // horizontal lines
// these can be filled really fast with a single memset.
colorFill(ptr, ptr + dx + 1, (PixelType)_fgColor);
} else if (dx == 0) { // vertical lines
// these ones use a static pitch increase.
while (y1++ <= y2) {
*ptr = (PixelType)_fgColor;
ptr += pitch;
}
} else if (ABS(dx) == ABS(dy)) { // diagonal lines
// these ones also use a fixed pitch increase
pitch += (x2 > x1) ? 1 : -1;
while (dy--) {
*ptr = (PixelType)_fgColor;
ptr += pitch;
}
} else { // generic lines, use the standard algorithm...
drawLineAlg(x1, y1, x2, y2, dx, dy, (PixelType)_fgColor);
}
}
/** CIRCLES **/
template<typename PixelType, typename PixelFormat>
void VectorRendererSpec<PixelType, PixelFormat>::
drawCircle(int x, int y, int r) {
if (x + r > Base::_activeSurface->w || y + r > Base::_activeSurface->h ||
x - r < 0 || y - r < 0 || x == 0 || y == 0 || r <= 0)
return;
if (Base::_fillMode != kFillDisabled && Base::_shadowOffset
&& x + r + Base::_shadowOffset < Base::_activeSurface->w
&& y + r + Base::_shadowOffset < Base::_activeSurface->h) {
drawCircleAlg(x + Base::_shadowOffset + 1, y + Base::_shadowOffset + 1, r, 0, kFillForeground);
}
switch (Base::_fillMode) {
case kFillDisabled:
if (Base::_strokeWidth)
drawCircleAlg(x, y, r, _fgColor, kFillDisabled);
break;
case kFillForeground:
drawCircleAlg(x, y, r, _fgColor, kFillForeground);
break;
case kFillBackground:
if (Base::_strokeWidth > 1) {
drawCircleAlg(x, y, r, _fgColor, kFillForeground);
drawCircleAlg(x, y, r - Base::_strokeWidth, _bgColor, kFillBackground);
} else {
drawCircleAlg(x, y, r, _bgColor, kFillBackground);
drawCircleAlg(x, y, r, _fgColor, kFillDisabled);
}
break;
case kFillGradient:
break;
}
}
/** SQUARES **/
template<typename PixelType, typename PixelFormat>
void VectorRendererSpec<PixelType, PixelFormat>::
drawSquare(int x, int y, int w, int h) {
if (x + w > Base::_activeSurface->w || y + h > Base::_activeSurface->h ||
w <= 0 || h <= 0 || x < 0 || y < 0)
return;
if (Base::_fillMode != kFillDisabled && Base::_shadowOffset
&& x + w + Base::_shadowOffset < Base::_activeSurface->w
&& y + h + Base::_shadowOffset < Base::_activeSurface->h) {
drawSquareShadow(x, y, w, h, Base::_shadowOffset);
}
switch (Base::_fillMode) {
case kFillDisabled:
if (Base::_strokeWidth)
drawSquareAlg(x, y, w, h, _fgColor, kFillDisabled);
break;
case kFillForeground:
drawSquareAlg(x, y, w, h, _fgColor, kFillForeground);
break;
case kFillBackground:
drawSquareAlg(x, y, w, h, _bgColor, kFillBackground);
drawSquareAlg(x, y, w, h, _fgColor, kFillDisabled);
break;
case kFillGradient:
VectorRendererSpec::drawSquareAlg(x, y, w, h, 0, kFillGradient);
if (Base::_strokeWidth)
drawSquareAlg(x, y, w, h, _fgColor, kFillDisabled);
break;
}
}
/** ROUNDED SQUARES **/
template<typename PixelType, typename PixelFormat>
void VectorRendererSpec<PixelType, PixelFormat>::
drawRoundedSquare(int x, int y, int r, int w, int h) {
if (x + w > Base::_activeSurface->w || y + h > Base::_activeSurface->h ||
w <= 0 || h <= 0 || x < 0 || y < 0)
return;
if ((r << 1) > w || (r << 1) > h)
r = MIN(w >> 1, h >> 1);
if (Base::_fillMode != kFillDisabled && Base::_shadowOffset
&& x + w + Base::_shadowOffset < Base::_activeSurface->w
&& y + h + Base::_shadowOffset < Base::_activeSurface->h) {
drawRoundedSquareShadow(x, y, r, w, h, Base::_shadowOffset);
}
switch (Base::_fillMode) {
case kFillDisabled:
if (Base::_strokeWidth)
drawRoundedSquareAlg(x, y, r, w, h, _fgColor, kFillDisabled);
break;
case kFillForeground:
drawRoundedSquareAlg(x, y, r, w, h, _fgColor, kFillForeground);
break;
case kFillBackground:
VectorRendererSpec::drawRoundedSquareAlg(x, y, r, w, h, _bgColor, kFillBackground);
drawRoundedSquareAlg(x, y, r, w, h, _fgColor, kFillDisabled);
break;
case kFillGradient:
if (Base::_strokeWidth > 1) {
drawRoundedSquareAlg(x, y, r, w, h, _fgColor, kFillForeground);
VectorRendererSpec::drawRoundedSquareAlg(x + Base::_strokeWidth/2, y + Base::_strokeWidth/2,
r - Base::_strokeWidth/2, w - Base::_strokeWidth, h - Base::_strokeWidth, 0, kFillGradient);
} else {
VectorRendererSpec::drawRoundedSquareAlg(x, y, r, w, h, 0, kFillGradient);
if (Base::_strokeWidth)
drawRoundedSquareAlg(x, y, r, w, h, _fgColor, kFillDisabled);
}
break;
}
}
template<typename PixelType, typename PixelFormat>
void VectorRendererSpec<PixelType, PixelFormat>::
drawTab(int x, int y, int r, int w, int h) {
if (x + w > Base::_activeSurface->w || y + h > Base::_activeSurface->h ||
w <= 0 || h <= 0 || x < 0 || y < 0 || (r << 1) > w || (r << 1) > h)
return;
switch (Base::_fillMode) {
case kFillDisabled:
return;
case kFillGradient:
case kFillBackground:
drawTabAlg(x, y, w, h, r, (Base::_fillMode == kFillBackground) ? _bgColor : _fgColor, Base::_fillMode);
if (Base::_strokeWidth)
drawTabAlg(x, y, w, h, r, _fgColor, kFillDisabled, (Base::_dynamicData >> 16), (Base::_dynamicData & 0xFFFF));
break;
case kFillForeground:
drawTabAlg(x, y, w, h, r, (Base::_fillMode == kFillBackground) ? _bgColor : _fgColor, Base::_fillMode);
break;
}
}
template<typename PixelType, typename PixelFormat>
void VectorRendererSpec<PixelType, PixelFormat>::
drawTriangle(int x, int y, int w, int h, TriangleOrientation orient) {
// Awesome hack: the AA messes up the last pixel triangles if their width is even
// ...fix the width instead of fixing the AA :p
if (w % 2 == 0) {
w++; h++;
}
if (x + w > Base::_activeSurface->w || y + h > Base::_activeSurface->h)
return;
PixelType color = 0;
if (Base::_strokeWidth <= 1) {
if (Base::_fillMode == kFillForeground)
color = _fgColor;
else if (Base::_fillMode == kFillBackground)
color = _bgColor;
} else {
if (Base::_fillMode == kFillDisabled)
return;
color = _fgColor;
}
switch(orient) {
case kTriangleUp:
case kTriangleDown:
#ifdef VECTOR_RENDERER_FAST_TRIANGLES
if (w == h)
drawTriangleFast(x, y, w, (orient == kTriangleDown), color, Base::_fillMode);
else
#endif
drawTriangleVertAlg(x, y, w, h, (orient == kTriangleDown), color, Base::_fillMode);
break;
case kTriangleLeft:
case kTriangleRight:
break;
}
if (Base::_strokeWidth > 0)
if (Base::_fillMode == kFillBackground || Base::_fillMode == kFillGradient) {
#ifdef VECTOR_RENDERER_FAST_TRIANGLES
if (w == h)
drawTriangleFast(x, y, w, (orient == kTriangleDown), _fgColor, kFillDisabled);
else
#endif
drawTriangleVertAlg(x, y, w, h, (orient == kTriangleDown), _fgColor, kFillDisabled);
}
}
/********************************************************************
* Aliased Primitive drawing ALGORITHMS - VectorRendererSpec
********************************************************************/
/** TAB ALGORITHM - NON AA */
template<typename PixelType, typename PixelFormat>
void VectorRendererSpec<PixelType, PixelFormat>::
drawTabAlg(int x1, int y1, int w, int h, int r, PixelType color, VectorRenderer::FillMode fill_m, int baseLeft, int baseRight) {
int f, ddF_x, ddF_y;
int x, y, px, py;
int pitch = Base::surfacePitch();
int sw = 0, sp = 0, hp = 0;
PixelType *ptr_tl = (PixelType *)Base::_activeSurface->getBasePtr(x1 + r, y1 + r);
PixelType *ptr_tr = (PixelType *)Base::_activeSurface->getBasePtr(x1 + w - r, y1 + r);
PixelType *ptr_fill = (PixelType *)Base::_activeSurface->getBasePtr(x1, y1);
int real_radius = r;
int short_h = h - r + 2;
int long_h = h;
if (fill_m == kFillDisabled) {
while (sw++ < Base::_strokeWidth) {
colorFill(ptr_fill + sp + r, ptr_fill + w + 1 + sp - r, color);
colorFill(ptr_fill + hp - sp + r, ptr_fill + w + hp + 1 - sp - r, color);
sp += pitch;
__BE_RESET();
r--;
while (x++ < y) {
__BE_ALGORITHM();
*(ptr_tr + (y) - (px)) = color;
*(ptr_tr + (x) - (py)) = color;
*(ptr_tl - (x) - (py)) = color;
*(ptr_tl - (y) - (px)) = color;
if (Base::_strokeWidth > 1) {
*(ptr_tr + (y) - (px - pitch)) = color;
*(ptr_tr + (x) - (py)) = color;
*(ptr_tl - (x) - (py)) = color;
*(ptr_tl - (y) - (px - pitch)) = color;
}
}
}
ptr_fill += pitch * real_radius;
while (short_h--) {
colorFill(ptr_fill, ptr_fill + Base::_strokeWidth - 1, color);
colorFill(ptr_fill + w - Base::_strokeWidth + 2, ptr_fill + w, color);
ptr_fill += pitch;
}
if (baseLeft) {
sw = 0;
ptr_fill = (PixelType *)Base::_activeSurface->getBasePtr(x1, y1 + h);
while (sw++ < Base::_strokeWidth) {
colorFill(ptr_fill - baseLeft, ptr_fill, color);
ptr_fill += pitch;
}
}
if (baseRight) {
sw = 0;
ptr_fill = (PixelType *)Base::_activeSurface->getBasePtr(x1 + w, y1 + h);
while (sw++ < Base::_strokeWidth) {
colorFill(ptr_fill, ptr_fill + baseRight, color);
ptr_fill += pitch;
}
}
} else {
__BE_RESET();
PixelType color1, color2;
color1 = color2 = color;
while (x++ < y) {
__BE_ALGORITHM();
if (fill_m == kFillGradient) {
color1 = calcGradient(real_radius - x, long_h);
color2 = calcGradient(real_radius - y, long_h);
}
colorFill(ptr_tl - x - py, ptr_tr + x - py, color2);
colorFill(ptr_tl - y - px, ptr_tr + y - px, color1);
*(ptr_tr + (y) - (px)) = color1;
*(ptr_tr + (x) - (py)) = color2;
*(ptr_tl - (x) - (py)) = color2;
*(ptr_tl - (y) - (px)) = color1;
}
ptr_fill += pitch * r;
while (short_h--) {
if (fill_m == kFillGradient)
color = calcGradient(real_radius++, long_h);
colorFill(ptr_fill, ptr_fill + w + 1, color);
ptr_fill += pitch;
}
}
}
/** SQUARE ALGORITHM **/
template<typename PixelType, typename PixelFormat>
void VectorRendererSpec<PixelType, PixelFormat>::
drawSquareAlg(int x, int y, int w, int h, PixelType color, VectorRenderer::FillMode fill_m) {
PixelType *ptr = (PixelType *)_activeSurface->getBasePtr(x, y);
int pitch = Base::surfacePitch();
int max_h = h;
if (fill_m != kFillDisabled) {
while (h--) {
if (fill_m == kFillGradient)
color = calcGradient(max_h - h, max_h);
colorFill(ptr, ptr + w, color);
ptr += pitch;
}
} else {
int sw = Base::_strokeWidth, sp = 0, hp = pitch * (h - 1);
while (sw--) {
colorFill(ptr + sp, ptr + w + sp, color);
colorFill(ptr + hp - sp, ptr + w + hp - sp, color);
sp += pitch;
}
while (h--) {
colorFill(ptr, ptr + Base::_strokeWidth, color);
colorFill(ptr + w - Base::_strokeWidth, ptr + w, color);
ptr += pitch;
}
}
}
/** SQUARE ALGORITHM **/
template<typename PixelType, typename PixelFormat>
void VectorRendererSpec<PixelType, PixelFormat>::
drawBevelSquareAlg(int x, int y, int w, int h, int bevel, PixelType top_color, PixelType bottom_color) {
PixelType *ptr_left = (PixelType *)_activeSurface->getBasePtr(x, y);
int pitch = Base::surfacePitch();
int i, j;
i = bevel;
while (i--) {
colorFill(ptr_left, ptr_left + w, top_color);
ptr_left += pitch;
}
i = h - bevel;
ptr_left = (PixelType *)_activeSurface->getBasePtr(x, y + bevel);
while (i--) {
colorFill(ptr_left, ptr_left + bevel, top_color);
ptr_left += pitch;
}
i = bevel;
ptr_left = (PixelType *)_activeSurface->getBasePtr(x, y + h - bevel);
while (i--) {
colorFill(ptr_left + i, ptr_left + w, bottom_color);
ptr_left += pitch;
}
i = h - bevel;
j = bevel;
ptr_left = (PixelType *)_activeSurface->getBasePtr(x + w - bevel, y);
while (i--) {
colorFill(ptr_left + j, ptr_left + bevel, bottom_color);
if (j > 0) j--;
ptr_left += pitch;
}
}
/** GENERIC LINE ALGORITHM **/
template<typename PixelType, typename PixelFormat>
void VectorRendererSpec<PixelType,PixelFormat>::
drawLineAlg(int x1, int y1, int x2, int y2, int dx, int dy, PixelType color) {
PixelType *ptr = (PixelType *)_activeSurface->getBasePtr(x1, y1);
int pitch = Base::surfacePitch();
int xdir = (x2 > x1) ? 1 : -1;
*ptr = (PixelType)color;
if (dx > dy) {
int ddy = dy * 2;
int dysub = ddy - (dx * 2);
int error_term = ddy - dx;
while (dx--) {
if (error_term >= 0) {
ptr += pitch;
error_term += dysub;
} else {
error_term += ddy;
}
ptr += xdir;
*ptr = (PixelType)color;
}
} else {
int ddx = dx * 2;
int dxsub = ddx - (dy * 2);
int error_term = ddx - dy;
while (dy--) {
if (error_term >= 0) {
ptr += xdir;
error_term += dxsub;
} else {
error_term += ddx;
}
ptr += pitch;
*ptr = (PixelType)color;
}
}
ptr = (PixelType *)_activeSurface->getBasePtr(x2, y2);
*ptr = (PixelType)color;
}
/** VERTICAL TRIANGLE DRAWING ALGORITHM **/
template<typename PixelType, typename PixelFormat>
void VectorRendererSpec<PixelType,PixelFormat>::
drawTriangleVertAlg(int x1, int y1, int w, int h, bool inverted, PixelType color, VectorRenderer::FillMode fill_m) {
int dx = w >> 1, dy = h, gradient_h = 0;
int pitch = Base::surfacePitch();
PixelType *ptr_right = 0, *ptr_left = 0;
if (inverted) {
ptr_right = (PixelType *)_activeSurface->getBasePtr(x1, y1);
ptr_left = (PixelType *)_activeSurface->getBasePtr(x1 + w, y1);
} else {
ptr_right = ptr_left = (PixelType *)_activeSurface->getBasePtr(x1 + dx, y1);
}
if (dx > dy) {
int ddy = dy * 2;
int dysub = ddy - (dx * 2);
int error_term = ddy - dx;
switch(fill_m) {
case kFillDisabled:
while (dx--) {
__TRIANGLE_MAINX();
*ptr_right = color;
*ptr_left = color;
}
colorFill(ptr_left, ptr_right, color);
break;
case kFillForeground:
case kFillBackground:
while (dx--) {
__TRIANGLE_MAINX();
if (inverted) colorFill(ptr_right, ptr_left, color);
else colorFill(ptr_left, ptr_right, color);
}
break;
case kFillGradient:
while (dx--) {
__TRIANGLE_MAINX();
if (inverted) colorFill(ptr_right, ptr_left, calcGradient(gradient_h++, h));
else colorFill(ptr_left, ptr_right, calcGradient(gradient_h++, h));
}
break;
}
} else {
int ddx = dx * 2;
int dxsub = ddx - (dy * 2);
int error_term = ddx - dy;
switch(fill_m) {
case kFillDisabled:
while (dy--) {
__TRIANGLE_MAINY();
*ptr_right = color;
*ptr_left = color;
}
colorFill(ptr_left, ptr_right, color);
break;
case kFillForeground:
case kFillBackground:
while (dy--) {
__TRIANGLE_MAINY();
if (inverted) colorFill(ptr_right, ptr_left, color);
else colorFill(ptr_left, ptr_right, color);
}
break;
case kFillGradient:
while (dy--) {
__TRIANGLE_MAINY();
if (inverted) colorFill(ptr_right, ptr_left, calcGradient(gradient_h++, h));
else colorFill(ptr_left, ptr_right, calcGradient(gradient_h++, h));
}
break;
}
}
}
/** VERTICAL TRIANGLE DRAWING - FAST VERSION FOR SQUARED TRIANGLES */
template<typename PixelType, typename PixelFormat>
void VectorRendererSpec<PixelType,PixelFormat>::
drawTriangleFast(int x1, int y1, int size, bool inverted, PixelType color, VectorRenderer::FillMode fill_m) {
int pitch = Base::surfacePitch();
int hstep = 0, dy = size;
bool grad = (fill_m == kFillGradient);
PixelType *ptr_right = 0, *ptr_left = 0;
if (inverted) {
ptr_left = (PixelType *)_activeSurface->getBasePtr(x1, y1);
ptr_right = (PixelType *)_activeSurface->getBasePtr(x1 + size, y1);
} else {
ptr_left = (PixelType *)_activeSurface->getBasePtr(x1, y1 + size);
ptr_right = (PixelType *)_activeSurface->getBasePtr(x1 + size, y1 + size);
pitch = -pitch;
}
if (fill_m == kFillDisabled) {
while (ptr_left < ptr_right) {
*ptr_left = color;
*ptr_right = color;
ptr_left += pitch;
ptr_right += pitch;
if (hstep++ % 2) {
ptr_left++;
ptr_right--;
}
}
} else {
while (ptr_left < ptr_right) {
colorFill(ptr_left, ptr_right, grad ? calcGradient(dy--, size) : color);
ptr_left += pitch;
ptr_right += pitch;
if (hstep++ % 2) {
ptr_left++;
ptr_right--;
}
}
}
}
/** ROUNDED SQUARE ALGORITHM **/
template<typename PixelType, typename PixelFormat>
void VectorRendererSpec<PixelType, PixelFormat>::
drawRoundedSquareAlg(int x1, int y1, int r, int w, int h, PixelType color, VectorRenderer::FillMode fill_m) {
int f, ddF_x, ddF_y;
int x, y, px, py;
int pitch = Base::surfacePitch();
int sw = 0, sp = 0, hp = h * pitch;
PixelType *ptr_tl = (PixelType *)Base::_activeSurface->getBasePtr(x1 + r, y1 + r);
PixelType *ptr_tr = (PixelType *)Base::_activeSurface->getBasePtr(x1 + w - r, y1 + r);
PixelType *ptr_bl = (PixelType *)Base::_activeSurface->getBasePtr(x1 + r, y1 + h - r);
PixelType *ptr_br = (PixelType *)Base::_activeSurface->getBasePtr(x1 + w - r, y1 + h - r);
PixelType *ptr_fill = (PixelType *)Base::_activeSurface->getBasePtr(x1, y1);
int real_radius = r;
int short_h = h - (2 * r) + 2;
int long_h = h;
if (fill_m == kFillDisabled) {
while (sw++ < Base::_strokeWidth) {
colorFill(ptr_fill + sp + r, ptr_fill + w + 1 + sp - r, color);
colorFill(ptr_fill + hp - sp + r, ptr_fill + w + hp + 1 - sp - r, color);
sp += pitch;
__BE_RESET();
r--;
while (x++ < y) {
__BE_ALGORITHM();
__BE_DRAWCIRCLE(ptr_tr, ptr_tl, ptr_bl, ptr_br, x, y, px, py);
if (Base::_strokeWidth > 1) {
__BE_DRAWCIRCLE(ptr_tr, ptr_tl, ptr_bl, ptr_br, x - 1, y, px, py);
__BE_DRAWCIRCLE(ptr_tr, ptr_tl, ptr_bl, ptr_br, x, y, px - pitch, py);
}
}
}
ptr_fill += pitch * real_radius;
while (short_h--) {
colorFill(ptr_fill, ptr_fill + Base::_strokeWidth, color);
colorFill(ptr_fill + w - Base::_strokeWidth + 1, ptr_fill + w + 1, color);
ptr_fill += pitch;
}
} else {
__BE_RESET();
PixelType color1, color2, color3, color4;
if (fill_m == kFillGradient) {
while (x++ < y) {
__BE_ALGORITHM();
color1 = calcGradient(real_radius - x, long_h);
color2 = calcGradient(real_radius - y, long_h);
color3 = calcGradient(long_h - r + x, long_h);
color4 = calcGradient(long_h - r + y, long_h);
colorFill(ptr_tl - x - py, ptr_tr + x - py, color2);
colorFill(ptr_tl - y - px, ptr_tr + y - px, color1);
colorFill(ptr_bl - x + py, ptr_br + x + py, color4);
colorFill(ptr_bl - y + px, ptr_br + y + px, color3);
__BE_DRAWCIRCLE_XCOLOR(ptr_tr, ptr_tl, ptr_bl, ptr_br, x, y, px, py);
}
} else {
while (x++ < y) {
__BE_ALGORITHM();
colorFill(ptr_tl - x - py, ptr_tr + x - py, color);
colorFill(ptr_tl - y - px, ptr_tr + y - px, color);
colorFill(ptr_bl - x + py, ptr_br + x + py, color);
colorFill(ptr_bl - y + px, ptr_br + y + px, color);
// do not remove - messes up the drawing at lower resolutions
__BE_DRAWCIRCLE(ptr_tr, ptr_tl, ptr_bl, ptr_br, x, y, px, py);
}
}
ptr_fill += pitch * r;
while (short_h--) {
if (fill_m == kFillGradient)
color = calcGradient(real_radius++, long_h);
colorFill(ptr_fill, ptr_fill + w + 1, color);
ptr_fill += pitch;
}
}
}
/** CIRCLE ALGORITHM **/
template<typename PixelType, typename PixelFormat>
void VectorRendererSpec<PixelType, PixelFormat>::
drawCircleAlg(int x1, int y1, int r, PixelType color, VectorRenderer::FillMode fill_m) {
int f, ddF_x, ddF_y;
int x, y, px, py, sw = 0;
int pitch = Base::surfacePitch();
PixelType *ptr = (PixelType *)Base::_activeSurface->getBasePtr(x1, y1);
if (fill_m == kFillDisabled) {
while (sw++ < Base::_strokeWidth) {
__BE_RESET();
r--;
*(ptr + y) = color;
*(ptr - y) = color;
*(ptr + py) = color;
*(ptr - py) = color;
while (x++ < y) {
__BE_ALGORITHM();
__BE_DRAWCIRCLE(ptr, ptr, ptr, ptr, x, y, px, py);
if (Base::_strokeWidth > 1) {
__BE_DRAWCIRCLE(ptr, ptr, ptr, ptr, x - 1, y, px, py);
__BE_DRAWCIRCLE(ptr, ptr, ptr, ptr, x, y, px - pitch, py);
}
}
}
} else {
colorFill(ptr - r, ptr + r, color);
__BE_RESET();
while (x++ < y) {
__BE_ALGORITHM();
colorFill(ptr - x + py, ptr + x + py, color);
colorFill(ptr - x - py, ptr + x - py, color);
colorFill(ptr - y + px, ptr + y + px, color);
colorFill(ptr - y - px, ptr + y - px, color);
}
}
}
/********************************************************************
* SHADOW drawing algorithms - VectorRendererSpec
********************************************************************/
template<typename PixelType, typename PixelFormat>
void VectorRendererSpec<PixelType, PixelFormat>::
drawSquareShadow(int x, int y, int w, int h, int blur) {
PixelType *ptr = (PixelType *)_activeSurface->getBasePtr(x + w - 1, y + blur);
int pitch = Base::surfacePitch();
int i, j;
i = h - blur;
while (i--) {
j = blur;
while (j--)
blendPixelPtr(ptr + j, 0, ((blur - j) << 8) / blur);
ptr += pitch;
}
ptr = (PixelType *)_activeSurface->getBasePtr(x + blur, y + h - 1);
while (i++ < blur) {
j = w - blur;
while (j--)
blendPixelPtr(ptr + j, 0, ((blur - i) << 8) / blur);
ptr += pitch;
}
ptr = (PixelType *)_activeSurface->getBasePtr(x + w, y + h);
i = 0;
while (i++ < blur) {
j = blur - 1;
while (j--)
blendPixelPtr(ptr + j, 0, (((blur - j) * (blur - i)) << 8) / (blur * blur));
ptr += pitch;
}
}
template<typename PixelType, typename PixelFormat>
void VectorRendererSpec<PixelType, PixelFormat>::
drawRoundedSquareShadow(int x1, int y1, int r, int w, int h, int blur) {
int f, ddF_x, ddF_y;
int x, y, px, py;
int pitch = Base::surfacePitch();
int alpha = 102;
x1 += blur;
y1 += blur;
PixelType *ptr_tr = (PixelType *)Base::_activeSurface->getBasePtr(x1 + w - r, y1 + r);
PixelType *ptr_bl = (PixelType *)Base::_activeSurface->getBasePtr(x1 + r, y1 + h - r);
PixelType *ptr_br = (PixelType *)Base::_activeSurface->getBasePtr(x1 + w - r, y1 + h - r);
PixelType *ptr_fill = (PixelType *)Base::_activeSurface->getBasePtr(x1 + w - blur, y1 + r);
int short_h = h - (2 * r) + 1;
__BE_RESET();
// HACK: As we are drawing circles exploting 8-axis symmetry,
// there are 4 pixels on each circle which are drawn twice.
// this is ok on filled circles, but when blending on surfaces,
// we cannot let it blend twice. awful.
uint32 hb = 0;
while (x++ < y) {
__BE_ALGORITHM();
if (((1 << x) & hb) == 0) {
blendFill(ptr_tr - px - r, ptr_tr + y - px, 0, alpha);
blendFill(ptr_bl - y + px, ptr_br + y + px, 0, alpha);
hb |= (1 << x);
}
if (((1 << y) & hb) == 0) {
blendFill(ptr_tr - r - py, ptr_tr + x - py, 0, alpha);
blendFill(ptr_bl - x + py, ptr_br + x + py, 0, alpha);
hb |= (1 << y);
}
}
while (short_h--) {
blendFill(ptr_fill - r, ptr_fill + blur, 0, alpha);
ptr_fill += pitch;
}
}
/********************************************************************
* ANTIALIASED PRIMITIVES drawing algorithms - VectorRendererAA
********************************************************************/
/** LINES **/
template<typename PixelType, typename PixelFormat>
void VectorRendererAA<PixelType, PixelFormat>::
drawLineAlg(int x1, int y1, int x2, int y2, int dx, int dy, PixelType color) {
PixelType *ptr = (PixelType *)Base::_activeSurface->getBasePtr(x1, y1);
int pitch = Base::surfacePitch();
int xdir = (x2 > x1) ? 1 : -1;
uint16 error_tmp, error_acc, gradient;
uint8 alpha;
*ptr = (PixelType)color;
if (dx > dy) {
gradient = (uint32)(dy << 16) / (uint32)dx;
error_acc = 0;
while (--dx) {
error_tmp = error_acc;
error_acc += gradient;
if (error_acc <= error_tmp)
ptr += pitch;
ptr += xdir;
alpha = (error_acc >> 8);
blendPixelPtr(ptr, color, ~alpha);
blendPixelPtr(ptr + pitch, color, alpha);
}
} else {
gradient = (uint32)(dx << 16) / (uint32)dy;
error_acc = 0;
while (--dy) {
error_tmp = error_acc;
error_acc += gradient;
if (error_acc <= error_tmp)
ptr += xdir;
ptr += pitch;
alpha = (error_acc >> 8);
blendPixelPtr(ptr, color, ~alpha);
blendPixelPtr(ptr + xdir, color, alpha);
}
}
Base::putPixel(x2, y2, color);
}
/** ROUNDED SQUARES **/
template<typename PixelType, typename PixelFormat>
void VectorRendererAA<PixelType, PixelFormat>::
drawRoundedSquareAlg(int x1, int y1, int r, int w, int h, PixelType color, VectorRenderer::FillMode fill_m) {
int x, y;
int p = Base::surfacePitch(), px, py;
int sw = 0, sp = 0, hp = h * p;
uint32 rsq = (r * r) << 16;
uint32 T = 0, oldT;
uint8 a1, a2;
PixelType *ptr_tl = (PixelType *)Base::_activeSurface->getBasePtr(x1 + r, y1 + r);
PixelType *ptr_tr = (PixelType *)Base::_activeSurface->getBasePtr(x1 + w - r, y1 + r);
PixelType *ptr_bl = (PixelType *)Base::_activeSurface->getBasePtr(x1 + r, y1 + h - r);
PixelType *ptr_br = (PixelType *)Base::_activeSurface->getBasePtr(x1 + w - r, y1 + h - r);
PixelType *ptr_fill = (PixelType *)Base::_activeSurface->getBasePtr(x1, y1);
int short_h = h - 2 * r;
if (fill_m == VectorRenderer::kFillDisabled) {
while (sw++ < Base::_strokeWidth) {
colorFill(ptr_fill + sp + r, ptr_fill + w + 1 + sp - r, color);
colorFill(ptr_fill + hp - sp + r, ptr_fill + w + hp + 1 - sp - r, color);
sp += p;
x = r - (sw - 1); y = 0; T = 0;
px = p * x; py = 0;
while (x > y++) {
__WU_ALGORITHM();
if (sw != 1 && sw != Base::_strokeWidth)
a2 = a1 = 255;
__WU_DRAWCIRCLE(ptr_tr, ptr_tl, ptr_bl, ptr_br, (x - 1), y, (px - p), py, a2);
__WU_DRAWCIRCLE(ptr_tr, ptr_tl, ptr_bl, ptr_br, x, y, px, py, a1);
}
}
ptr_fill += p * r;
while (short_h-- >= 0) {
colorFill(ptr_fill, ptr_fill + Base::_strokeWidth, color);
colorFill(ptr_fill + w - Base::_strokeWidth + 1, ptr_fill + w + 1, color);
ptr_fill += p;
}
} else {
x = r; y = 0; T = 0;
px = p * x; py = 0;
while (x > y++) {
__WU_ALGORITHM();
colorFill(ptr_tl - x - py, ptr_tr + x - py, color);
colorFill(ptr_tl - y - px, ptr_tr + y - px, color);
colorFill(ptr_bl - x + py, ptr_br + x + py, color);
colorFill(ptr_bl - y + px, ptr_br + y + px, color);
__WU_DRAWCIRCLE(ptr_tr, ptr_tl, ptr_bl, ptr_br, x, y, px, py, a1);
}
ptr_fill += p * r;
while (short_h-- >= 0) {
colorFill(ptr_fill, ptr_fill + w + 1, color);
ptr_fill += p;
}
}
}
/** CIRCLES **/
template<typename PixelType, typename PixelFormat>
void VectorRendererAA<PixelType, PixelFormat>::
drawCircleAlg(int x1, int y1, int r, PixelType color, VectorRenderer::FillMode fill_m) {
int x, y, sw = 0;
int p = Base::surfacePitch(), px, py;
uint32 rsq = (r * r) << 16;
uint32 T = 0, oldT;
uint8 a1, a2;
PixelType *ptr = (PixelType *)Base::_activeSurface->getBasePtr(x1, y1);
if (fill_m == VectorRenderer::kFillDisabled) {
while (sw++ < Base::_strokeWidth) {
x = r - (sw - 1); y = 0; T = 0;
px = p * x; py = 0;
*(ptr + x) = (PixelType)color;
*(ptr - x) = (PixelType)color;
*(ptr + px) = (PixelType)color;
*(ptr - px) = (PixelType)color;
while (x > y++) {
__WU_ALGORITHM();
if (sw != 1 && sw != Base::_strokeWidth)
a2 = a1 = 255;
__WU_DRAWCIRCLE(ptr, ptr, ptr, ptr, (x - 1), y, (px - p), py, a2);
__WU_DRAWCIRCLE(ptr, ptr, ptr, ptr, x, y, px, py, a1);
}
}
} else {
colorFill(ptr - r, ptr + r + 1, color);
x = r; y = 0; T = 0;
px = p * x; py = 0;
while (x > y++) {
__WU_ALGORITHM();
colorFill(ptr - x + py, ptr + x + py, color);
colorFill(ptr - x - py, ptr + x - py, color);
colorFill(ptr - y + px, ptr + y + px, color);
colorFill(ptr - y - px, ptr + y - px, color);
__WU_DRAWCIRCLE(ptr, ptr, ptr, ptr, x, y, px, py, a1);
}
}
}
} // end of namespace Graphics
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