spine-runtimes/spine-sfml/src/spine/spine-sfml.cpp

/******************************************************************************
 * Spine Runtimes Software License v2.5
 *
 * Copyright (c) 2013-2016, Esoteric Software
 * All rights reserved.
 *
 * You are granted a perpetual, non-exclusive, non-sublicensable, and
 * non-transferable license to use, install, execute, and perform the Spine
 * Runtimes software and derivative works solely for personal or internal
 * use. Without the written permission of Esoteric Software (see Section 2 of
 * the Spine Software License Agreement), you may not (a) modify, translate,
 * adapt, or develop new applications using the Spine Runtimes or otherwise
 * create derivative works or improvements of the Spine Runtimes or (b) remove,
 * delete, alter, or obscure any trademarks or any copyright, trademark, patent,
 * or other intellectual property or proprietary rights notices on or in the
 * Software, including any copy thereof. Redistributions in binary or source
 * form must include this license and terms.
 *
 * THIS SOFTWARE IS PROVIDED BY ESOTERIC SOFTWARE "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 ESOTERIC SOFTWARE BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, BUSINESS INTERRUPTION, OR LOSS OF
 * USE, DATA, OR PROFITS) 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 <spine/spine-sfml.h>

#ifndef SPINE_MESH_VERTEX_COUNT_MAX
#define SPINE_MESH_VERTEX_COUNT_MAX 1000
#endif

using namespace sf;

void _AtlasPage_createTexture (AtlasPage* self, const char* path){
	Texture* texture = new Texture();
	if (!texture->loadFromFile(path)) return;

	if (self->magFilter == SP_ATLAS_LINEAR) texture->setSmooth(true);
	if (self->uWrap == SP_ATLAS_REPEAT && self->vWrap == SP_ATLAS_REPEAT) texture->setRepeated(true);

	self->rendererObject = texture;
	Vector2u size = texture->getSize();
	self->width = size.x;
	self->height = size.y;
}

void _AtlasPage_disposeTexture (AtlasPage* self){
	delete (Texture*)self->rendererObject;
}

char* _Util_readFile (const char* path, int* length){
	return _readFile(path, length);
}

/**/

namespace spine {

SkeletonDrawable::SkeletonDrawable (SkeletonData* skeletonData, AnimationStateData* stateData) :
		timeScale(1),
		vertexArray(new VertexArray(Triangles, skeletonData->bonesCount * 4)),
		worldVertices(0) {
	Bone_setYDown(true);
	worldVertices = MALLOC(float, SPINE_MESH_VERTEX_COUNT_MAX);
	skeleton = Skeleton_create(skeletonData);

	ownsAnimationStateData = stateData == 0;
	if (ownsAnimationStateData) stateData = AnimationStateData_create(skeletonData);

	state = AnimationState_create(stateData);
}

SkeletonDrawable::~SkeletonDrawable () {
	delete vertexArray;
	FREE(worldVertices);
	if (ownsAnimationStateData) AnimationStateData_dispose(state->data);
	AnimationState_dispose(state);
	Skeleton_dispose(skeleton);
}

void SkeletonDrawable::update (float deltaTime) {
	Skeleton_update(skeleton, deltaTime);
	AnimationState_update(state, deltaTime * timeScale);
	AnimationState_apply(state, skeleton);
	Skeleton_updateWorldTransform(skeleton);
}

void SkeletonDrawable::draw (RenderTarget& target, RenderStates states) const {
	vertexArray->clear();

	sf::Vertex vertices[4];
	sf::Vertex vertex;
	for (int i = 0; i < skeleton->slotsCount; ++i) {
		Slot* slot = skeleton->drawOrder[i];
		Attachment* attachment = slot->attachment;
		if (!attachment) continue;

		sf::BlendMode blend;
		switch (slot->data->blendMode) {
		case BLEND_MODE_ADDITIVE:
			blend = BlendAdd;
			break;
		case BLEND_MODE_MULTIPLY:
			blend = BlendMultiply;
			break;
		case BLEND_MODE_SCREEN: // Unsupported, fall through.
		default:
			blend = BlendAlpha;
		}
		if (states.blendMode != blend) {
			target.draw(*vertexArray, states);
			vertexArray->clear();
			states.blendMode = blend;
		}

		Texture* texture = 0;
		if (attachment->type == ATTACHMENT_REGION) {
			RegionAttachment* regionAttachment = (RegionAttachment*)attachment;
			texture = (Texture*)((AtlasRegion*)regionAttachment->rendererObject)->page->rendererObject;
			spRegionAttachment_computeWorldVertices(regionAttachment, slot->bone, worldVertices, 0, 2);

			Uint8 r = static_cast<Uint8>(skeleton->color.r * slot->color.r * 255);
			Uint8 g = static_cast<Uint8>(skeleton->color.g * slot->color.g * 255);
			Uint8 b = static_cast<Uint8>(skeleton->color.b * slot->color.b * 255);
			Uint8 a = static_cast<Uint8>(skeleton->color.a * slot->color.a * 255);

			Vector2u size = texture->getSize();
			vertices[0].color.r = r;
			vertices[0].color.g = g;
			vertices[0].color.b = b;
			vertices[0].color.a = a;
			vertices[0].position.x = worldVertices[VERTEX_X1];
			vertices[0].position.y = worldVertices[VERTEX_Y1];
			vertices[0].texCoords.x = regionAttachment->uvs[VERTEX_X1] * size.x;
			vertices[0].texCoords.y = regionAttachment->uvs[VERTEX_Y1] * size.y;

			vertices[1].color.r = r;
			vertices[1].color.g = g;
			vertices[1].color.b = b;
			vertices[1].color.a = a;
			vertices[1].position.x = worldVertices[VERTEX_X2];
			vertices[1].position.y = worldVertices[VERTEX_Y2];
			vertices[1].texCoords.x = regionAttachment->uvs[VERTEX_X2] * size.x;
			vertices[1].texCoords.y = regionAttachment->uvs[VERTEX_Y2] * size.y;

			vertices[2].color.r = r;
			vertices[2].color.g = g;
			vertices[2].color.b = b;
			vertices[2].color.a = a;
			vertices[2].position.x = worldVertices[VERTEX_X3];
			vertices[2].position.y = worldVertices[VERTEX_Y3];
			vertices[2].texCoords.x = regionAttachment->uvs[VERTEX_X3] * size.x;
			vertices[2].texCoords.y = regionAttachment->uvs[VERTEX_Y3] * size.y;

			vertices[3].color.r = r;
			vertices[3].color.g = g;
			vertices[3].color.b = b;
			vertices[3].color.a = a;
			vertices[3].position.x = worldVertices[VERTEX_X4];
			vertices[3].position.y = worldVertices[VERTEX_Y4];
			vertices[3].texCoords.x = regionAttachment->uvs[VERTEX_X4] * size.x;
			vertices[3].texCoords.y = regionAttachment->uvs[VERTEX_Y4] * size.y;

			vertexArray->append(vertices[0]);
			vertexArray->append(vertices[1]);
			vertexArray->append(vertices[2]);
			vertexArray->append(vertices[0]);
			vertexArray->append(vertices[2]);
			vertexArray->append(vertices[3]);

		} else if (attachment->type == ATTACHMENT_MESH) {
			MeshAttachment* mesh = (MeshAttachment*)attachment;
			if (mesh->super.worldVerticesLength > SPINE_MESH_VERTEX_COUNT_MAX) continue;
			texture = (Texture*)((AtlasRegion*)mesh->rendererObject)->page->rendererObject;
			spVertexAttachment_computeWorldVertices(SUPER(mesh), slot, 0, mesh->super.worldVerticesLength, worldVertices, 0, 2);

			Uint8 r = static_cast<Uint8>(skeleton->color.r * slot->color.r * 255);
			Uint8 g = static_cast<Uint8>(skeleton->color.g * slot->color.g * 255);
			Uint8 b = static_cast<Uint8>(skeleton->color.b * slot->color.b * 255);
			Uint8 a = static_cast<Uint8>(skeleton->color.a * slot->color.a * 255);
			vertex.color.r = r;
			vertex.color.g = g;
			vertex.color.b = b;
			vertex.color.a = a;

			Vector2u size = texture->getSize();
			for (int i = 0; i < mesh->trianglesCount; ++i) {
				int index = mesh->triangles[i] << 1;
				vertex.position.x = worldVertices[index];
				vertex.position.y = worldVertices[index + 1];
				vertex.texCoords.x = mesh->uvs[index] * size.x;
				vertex.texCoords.y = mesh->uvs[index + 1] * size.y;
				vertexArray->append(vertex);
			}

		}

		if (texture) {
			// SMFL doesn't handle batching for us, so we'll just force a single texture per skeleton.
			states.texture = texture;
		}
	}
	target.draw(*vertexArray, states);
}

} /* namespace spine */