wonderbrush/support/blending.h

88 blend_colors_copy(uint8* bottom, uint8 alpha, uint8* dest,
92 	if (alpha > 0) {
93 		if (bottom[3] == 0 || alpha == 255) {
97 			dest[3] = alpha;
105 						gc1, gc2, gc3, alpha,
115 blend_colors(uint8* bottom, uint8 alpha,
119 	if (alpha > 0) {
120 		if (bottom[3] == 0 || alpha == 255) {
124 			bottom[3] = alpha;
132 						gc1, gc2, gc3, alpha,
140 blend_colors_copy(uint8* bottom, uint8 alpha, uint8* dest,
143 	if (alpha > 0) {
144 		if (bottom[3] == 0 || alpha == 255) {
148 			dest[3] = alpha;
151 				  c1, c2, c3, alpha,
161 blend_colors(uint8* bottom, uint8 alpha, uint8 c1, uint8 c2, uint8 c3)
163 	if (alpha > 0) {
164 		if (bottom[3] == 0 || alpha == 255) {
168 			bottom[3] = alpha;
171 				  c1, c2, c3, alpha,
181 	uint8 alpha = (source[3] * alphaOverride) / 255;
182 	if (alpha > 0) {
183 		if (bottom[3] == 0 || alpha == 255) {
187 			bottom[3] = alpha;
190 				  source[0], source[1], source[2], alpha,
232 blend_pixels(uint8* bottom, uint8* top, uint8 alpha)
234 	if (alpha > 0) {
235 		if (alpha == 255) {
249 			uint8 mergeAlpha = bottom[3] ? (top[3] * alpha) / 255 : 255;
254 			bottom[3] = (bottom[3] * (255 - alpha) + top[3] * alpha) / 255;
261 blend_pixels_copy(uint8* bottom, uint8* top, uint8* dest, uint8 alpha)
263 	if (alpha > 0) {
264 		if (alpha == 255) {
278 			uint8 mergeAlpha = bottom[3] ? (top[3] * alpha) / 255 : 255;
283 			dest[3] = (bottom[3] * (255 - alpha) + top[3] * alpha) / 255;
297 	uint8 alpha = (top[3] * alphaOverride) / 255;
298 	if (alpha > 0) {
299 		if (alpha == 255) {
313 			uint8 mergeAlpha = bottom[3] ? alpha : 255;
318 			bottom[3] = (bottom[3] * (255 - alpha) + top[3] * alpha) / 255;
327 	uint8 alpha = (top[3] * alphaOverride) / 255;
328 	if (alpha > 0) {
329 		if (alpha == 255) {
343 			uint8 mergeAlpha = bottom[3] ? alpha : 255;
348 			dest[3] = (bottom[3] * (255 - alpha) + top[3] * alpha) / 255;
363 blend_colors_copy(uint8* bottom, uint8 alpha, uint8* dest,
366 	if (alpha > 0) {
367 		if (bottom[3] == 0 || alpha == 255) {
371 			dest[3] = alpha;
374 				uint32 destAlpha = 255 - alpha;
375 				dest[0] = (uint8)((bottom[0] * destAlpha + c1 * alpha) / 255);
376 				dest[1] = (uint8)((bottom[1] * destAlpha + c2 * alpha) / 255);
377 				dest[2] = (uint8)((bottom[2] * destAlpha + c3 * alpha) / 255);
380 				uint8 alphaRest = 255 - alpha;
383 				uint32 alphaSrc = 255 * alpha;
397 blend_colors(uint8* bottom, uint8 alpha, uint8 c1, uint8 c2, uint8 c3)
399 	if (alpha > 0) {
400 		if (bottom[3] == 0 || alpha == 255) {
404 			bottom[3] = alpha;
407 				uint32 destAlpha = 255 - alpha;
408 				bottom[0] = (uint8)((bottom[0] * destAlpha + c1 * alpha) / 255);
409 				bottom[1] = (uint8)((bottom[1] * destAlpha + c2 * alpha) / 255);
410 				bottom[2] = (uint8)((bottom[2] * destAlpha + c3 * alpha) / 255);
412 				uint8 alphaRest = 255 - alpha;
415 				uint32 alphaSrc = 255 * alpha;
429 	uint8 alpha = (source[3] * alphaOverride) / 255;
430 	if (alpha > 0) {
431 		if (bottom[3] == 0 || alpha == 255) {
435 			bottom[3] = alpha;
438 				uint32 destAlpha = 255 - alpha;
439 				bottom[0] = (uint8)((bottom[0] * destAlpha + source[0] * alpha) / 255);
440 				bottom[1] = (uint8)((bottom[1] * destAlpha + source[1] * alpha) / 255);
441 				bottom[2] = (uint8)((bottom[2] * destAlpha + source[2] * alpha) / 255);
443 				uint8 alphaRest = 255 - alpha;
446 				uint32 alphaSrc = 255 * alpha;
517 blend_pixels(uint8* bottom, uint8* top, uint8 alpha)
519 	if (alpha > 0) {
520 		if (alpha == 255) {
526 			uint8 mergeAlpha = bottom[3] ? (top[3] * alpha) / 255 : 255;
531 			bottom[3] = (bottom[3] * (255 - alpha) + top[3] * alpha) / 255;
538 blend_pixels_copy(uint8* bottom, uint8* top, uint8* dest, uint8 alpha)
540 	if (alpha > 0) {
541 		if (alpha == 255) {
547 			uint8 mergeAlpha = bottom[3] ? (top[3] * alpha) / 255 : 255;
552 			dest[3] = (bottom[3] * (255 - alpha) + top[3] * alpha) / 255;
566 	uint8 alpha = (top[3] * alphaOverride) / 255;
567 	if (alpha > 0) {
568 		if (alpha == 255) {
574 			uint8 mergeAlpha = bottom[3] ? alpha : 255;
579 			bottom[3] = (bottom[3] * (255 - alpha) + top[3] * alpha) / 255;
588 	uint8 alpha = (top[3] * alphaOverride) / 255;
589 	if (alpha > 0) {
590 		if (alpha == 255) {
596 			uint8 mergeAlpha = bottom[3] ? alpha : 255;
601 			dest[3] = (bottom[3] * (255 - alpha) + top[3] * alpha) / 255;