aboutsummaryrefslogtreecommitdiff
path: root/src/FbTk
diff options
context:
space:
mode:
Diffstat (limited to 'src/FbTk')
-rw-r--r--src/FbTk/TextureRender.cc79
1 files changed, 41 insertions, 38 deletions
diff --git a/src/FbTk/TextureRender.cc b/src/FbTk/TextureRender.cc
index 7abc436..df7a550 100644
--- a/src/FbTk/TextureRender.cc
+++ b/src/FbTk/TextureRender.cc
@@ -109,7 +109,7 @@ struct Vec2 {
109 // negative: 'other' is counterclockwise of this 109 // negative: 'other' is counterclockwise of this
110 // 0: same line 110 // 0: same line
111 int cross(int other_x, int other_y) const { 111 int cross(int other_x, int other_y) const {
112 return (x * other_y) - (other_x * y); 112 return (x * other_y) - (y * other_x);
113 } 113 }
114}; 114};
115 115
@@ -165,13 +165,13 @@ typedef void (*prepareFunc)(size_t, FbTk::RGBA*, const FbTk::Color*, const FbTk:
165void prepareLinearTable(size_t size, FbTk::RGBA* rgba, 165void prepareLinearTable(size_t size, FbTk::RGBA* rgba,
166 const FbTk::Color* from, const FbTk::Color* to, double scale) { 166 const FbTk::Color* from, const FbTk::Color* to, double scale) {
167 167
168 const double delta_r = (double)(to->red() - from->red()) / (double)size; 168 const double r = from->red();
169 const double delta_g = (double)(to->green() - from->green()) / (double)size; 169 const double g = from->green();
170 const double delta_b = (double)(to->blue() - from->blue()) / (double)size; 170 const double b = from->blue();
171 171
172 double r = from->red(); 172 const double delta_r = (to->red() - r) / (double)size;
173 double g = from->green(); 173 const double delta_g = (to->green() - g) / (double)size;
174 double b = from->blue(); 174 const double delta_b = (to->blue() - b) / (double)size;
175 175
176 size_t i; 176 size_t i;
177 for (i = 0; i < size; ++i) { 177 for (i = 0; i < size; ++i) {
@@ -184,19 +184,20 @@ void prepareLinearTable(size_t size, FbTk::RGBA* rgba,
184void prepareSquareTable(size_t size, FbTk::RGBA* rgba, 184void prepareSquareTable(size_t size, FbTk::RGBA* rgba,
185 const FbTk::Color* from, const FbTk::Color* to, double scale) { 185 const FbTk::Color* from, const FbTk::Color* to, double scale) {
186 186
187 const double delta_r = (double)(to->red() - from->red());
188 const double delta_g = (double)(to->green() - from->green());
189 const double delta_b = (double)(to->blue() - from->blue());
190 187
191 double r = from->red(); 188 const double r = from->red();
192 double g = from->green(); 189 const double g = from->green();
193 double b = from->blue(); 190 const double b = from->blue();
191
192 const double delta_r = (to->red() - r);
193 const double delta_g = (to->green() - g);
194 const double delta_b = (to->blue() - b);
194 195
195 double s; 196 double s;
196 size_t i; 197 size_t i;
197 for (i = 0; i < size; ++i) { 198 for (i = 0; i < size; ++i) {
198 s = 1.0 - ((double)(i + 1) / (double)size); 199 s = 1.0 - ((double)(i + 1) / (double)size);
199 s *=s; 200 s *= s;
200 rgba[i].r = static_cast<unsigned char>(scale * (r + (s * delta_r))); 201 rgba[i].r = static_cast<unsigned char>(scale * (r + (s * delta_r)));
201 rgba[i].g = static_cast<unsigned char>(scale * (g + (s * delta_g))); 202 rgba[i].g = static_cast<unsigned char>(scale * (g + (s * delta_g)));
202 rgba[i].b = static_cast<unsigned char>(scale * (b + (s * delta_b))); 203 rgba[i].b = static_cast<unsigned char>(scale * (b + (s * delta_b)));
@@ -407,7 +408,7 @@ void renderPyramidGradient(bool interlaced,
407 408
408 // we need 2 gradients but use only 'one' buffer 409 // we need 2 gradients but use only 'one' buffer
409 FbTk::RGBA* x_gradient = (FbTk::RGBA*)&getGradientBuffer(s * sizeof(FbTk::RGBA))[0]; 410 FbTk::RGBA* x_gradient = (FbTk::RGBA*)&getGradientBuffer(s * sizeof(FbTk::RGBA))[0];
410 FbTk::RGBA* y_gradient = &x_gradient[width]; 411 FbTk::RGBA* y_gradient = x_gradient + width;
411 412
412 prepareMirrorTable(prepareLinearTable, width, x_gradient, from, to, 0.5); 413 prepareMirrorTable(prepareLinearTable, width, x_gradient, from, to, 0.5);
413 prepareMirrorTable(prepareLinearTable, height, y_gradient, from, to, 0.5); 414 prepareMirrorTable(prepareLinearTable, height, y_gradient, from, to, 0.5);
@@ -430,15 +431,15 @@ void renderPyramidGradient(bool interlaced,
430 431
431 432
432/* 433/*
433 * ................. 434 .................
434 * ............. 435 .............
435 * ......... 436 .........
436 * .... '.' - x_gradient 437 .... '.' - x_gradient
437 * . ' ' - y_gradient 438 . ' ' - y_gradient
438 * .... 439 ....
439 * ......... 440 .........
440 * ............. 441 .............
441 * ................. 442 .................
442 */ 443 */
443void renderRectangleGradient(bool interlaced, 444void renderRectangleGradient(bool interlaced,
444 unsigned int width, unsigned int height, 445 unsigned int width, unsigned int height,
@@ -450,13 +451,13 @@ void renderRectangleGradient(bool interlaced,
450 451
451 // we need 2 gradients but use only 'one' buffer 452 // we need 2 gradients but use only 'one' buffer
452 FbTk::RGBA* x_gradient = (FbTk::RGBA*)&getGradientBuffer(s * sizeof(FbTk::RGBA))[0]; 453 FbTk::RGBA* x_gradient = (FbTk::RGBA*)&getGradientBuffer(s * sizeof(FbTk::RGBA))[0];
453 FbTk::RGBA* y_gradient = &x_gradient[width]; 454 FbTk::RGBA* y_gradient = x_gradient + width;
454 455
455 prepareMirrorTable(prepareLinearTable, width, x_gradient, from, to, 1.0); 456 prepareMirrorTable(prepareLinearTable, width, x_gradient, from, to, 1.0);
456 prepareMirrorTable(prepareLinearTable, height, y_gradient, from, to, 1.0); 457 prepareMirrorTable(prepareLinearTable, height, y_gradient, from, to, 1.0);
457 458
458 // diagonal vectors 459 // diagonal vectors
459 const Vec2 a = { static_cast<int>(width) - 1, static_cast<int>(height - 1) }; 460 const Vec2 a = { static_cast<int>(width) - 1, static_cast<int>(height) - 1 };
460 const Vec2 b = { a.x, -a.y }; 461 const Vec2 b = { a.x, -a.y };
461 462
462 int x; 463 int x;
@@ -468,8 +469,8 @@ void renderRectangleGradient(bool interlaced,
468 469
469 // check, if the point (x, y) is left or right of the vectors 470 // check, if the point (x, y) is left or right of the vectors
470 // 'a' and 'b'. if the point is on the same side for both 'a' and 471 // 'a' and 'b'. if the point is on the same side for both 'a' and
471 // 'b' (a.cross() is equal to b.cross()) then use the x_gradient, 472 // 'b' (sign(a.cross()) is equal to sign(b.cross())) then use the
472 // otherwise use y_gradient 473 // y_gradient, otherwise use x_gradient
473 474
474 if (sign(a.cross(x, y)) * sign(b.cross(x, b.y + y)) < 0) { 475 if (sign(a.cross(x, y)) * sign(b.cross(x, b.y + y)) < 0) {
475 rgba[i] = x_gradient[x]; 476 rgba[i] = x_gradient[x];
@@ -510,8 +511,8 @@ void renderPipeCrossGradient(bool interlaced,
510 511
511 // check, if the point (x, y) is left or right of the vectors 512 // check, if the point (x, y) is left or right of the vectors
512 // 'a' and 'b'. if the point is on the same side for both 'a' and 513 // 'a' and 'b'. if the point is on the same side for both 'a' and
513 // 'b' (a.cross() is equal to b.cross()) then use the x_gradient, 514 // 'b' (sign(a.cross()) is equal to sign(b.cross())) then use the
514 // otherwise use y_gradient 515 // x_gradient, otherwise use y_gradient
515 516
516 if (sign(a.cross(x, y)) * sign(b.cross(x, b.y + y)) > 0) { 517 if (sign(a.cross(x, y)) * sign(b.cross(x, b.y + y)) > 0) {
517 rgba[i] = x_gradient[x]; 518 rgba[i] = x_gradient[x];
@@ -573,18 +574,19 @@ void renderEllipticGradient(bool interlaced,
573 int x; 574 int x;
574 int y; 575 int y;
575 576
576 double dr = (double)to->red() - (double)from->red() ;
577 double dg = (double)to->green()- (double)from->green() ;
578 double db = (double)to->blue() - (double)from->blue() ;
579
580 int w2 = width/2;
581 int h2 = height/2;
582 577
583 double d;
584 double r = to->red(); 578 double r = to->red();
585 double g = to->green(); 579 double g = to->green();
586 double b = to->blue(); 580 double b = to->blue();
587 581
582 double dr = r - from->red();
583 double dg = g - from->green();
584 double db = b - from->blue();
585
586 int w2 = width/2;
587 int h2 = height/2;
588
589 double d;
588 590
589 for (i = 0, y = -h2; y < h2; ++y) { 591 for (i = 0, y = -h2; y < h2; ++y) {
590 for (x = -w2; x < w2; ++x, ++i) { 592 for (x = -w2; x < w2; ++x, ++i) {
@@ -829,8 +831,9 @@ Pixmap TextureRender::renderGradient(const FbTk::Texture &texture) {
829 } 831 }
830 } 832 }
831 833
832 if (inverted) 834 if (inverted) {
833 invertRGB(width, height, rgba); 835 invertRGB(width, height, rgba);
836 }
834 837
835 return renderPixmap(); 838 return renderPixmap();
836 839