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graphics/tinygl/zblit.cpp
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855
graphics/tinygl/zblit.cpp
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/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#include "common/array.h"
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#include "graphics/tinygl/zblit.h"
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#include "graphics/tinygl/zgl.h"
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#include "graphics/tinygl/pixelbuffer.h"
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#include "graphics/tinygl/zdirtyrect.h"
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#include "graphics/tinygl/gl.h"
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#include "graphics/blit.h"
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#include <math.h>
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namespace TinyGL {
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Common::Point transformPoint(float x, float y, int rotation);
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Common::Rect rotateRectangle(int x, int y, int width, int height, int rotation, int originX, int originY);
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struct BlitImage {
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public:
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BlitImage() : _isDisposed(false), _version(0), _binaryTransparent(false), _opaque(true), _zBuffer(false), _refcount(1) { }
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void loadData(const Graphics::Surface &surface, uint32 colorKey, bool applyColorKey, bool zBuffer) {
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_lines.clear();
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_zBuffer = zBuffer;
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if (_zBuffer) {
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_surface.copyFrom(surface);
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return;
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}
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int size = surface.w * surface.h;
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Graphics::PixelBuffer buffer(surface.format, (byte *)const_cast<void *>(surface.getPixels()));
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_opaque = true;
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if (surface.format.aBits() > 0) {
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for (int x = 0; x < size; x++) {
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uint8 r, g, b, a;
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buffer.getARGBAt(x, a, r, g, b);
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if (a != 0xFF) {
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_opaque = false;
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}
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}
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}
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if (_opaque && !applyColorKey) {
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GLContext *c = gl_get_context();
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_surface.convertFrom(surface, c->fb->getPixelFormat());
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_binaryTransparent = false;
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} else {
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const Graphics::PixelFormat textureFormat = Graphics::PixelFormat::createFormatRGBA32();
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_surface.convertFrom(surface, textureFormat);
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Graphics::PixelBuffer dataBuffer(textureFormat, (byte *)const_cast<void *>(_surface.getPixels()));
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if (applyColorKey) {
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for (int x = 0; x < size; x++) {
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if (buffer.getValueAt(x) == colorKey) {
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// Color keyed pixels become transparent white.
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dataBuffer.setPixelAt(x, 0, 255, 255, 255);
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_opaque = false;
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}
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}
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}
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// Create opaque lines data.
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// A line of pixels can not wrap more that one line of the image, since it would break
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// blitting of bitmaps with a non-zero x position.
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Graphics::PixelBuffer srcBuf = dataBuffer;
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_binaryTransparent = true;
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for (int y = 0; y < surface.h; y++) {
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int start = -1;
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for (int x = 0; x < surface.w; ++x) {
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// We found a transparent pixel, so save a line from 'start' to the pixel before this.
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uint8 r, g, b, a;
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srcBuf.getARGBAt(x, a, r, g, b);
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if (a != 0 && a != 0xFF) {
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_binaryTransparent = false;
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}
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if (a == 0 && start >= 0) {
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_lines.push_back(Line(start, y, x - start, srcBuf.getRawBuffer(start), textureFormat));
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start = -1;
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} else if (a != 0 && start == -1) {
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start = x;
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}
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}
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// end of the bitmap line. if start is an actual pixel save the line.
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if (start >= 0) {
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_lines.push_back(Line(start, y, surface.w - start, srcBuf.getRawBuffer(start), textureFormat));
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}
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srcBuf.shiftBy(surface.w);
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}
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}
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_version++;
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}
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int getVersion() const {
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return _version;
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}
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~BlitImage() {
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_surface.free();
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}
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struct Line {
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int _x;
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int _y;
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int _bpp;
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int _length;
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byte *_pixels;
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Line() : _x(0), _y(0), _length(0), _pixels(nullptr) { }
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Line(int x, int y, int length, byte *pixels, const Graphics::PixelFormat &textureFormat) :
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_x(x), _y(y), _bpp(gl_get_context()->fb->getPixelBufferBpp()), _length(length) {
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_pixels = (byte *)gl_zalloc(_length * _bpp);
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Graphics::crossBlit(_pixels, pixels, _length * _bpp, _length * _bpp, _length, 1,
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gl_get_context()->fb->getPixelFormat(), textureFormat);
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}
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Line &operator=(const Line &other) {
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if (this == &other)
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return *this;
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_x = other._x;
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_y = other._y;
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if (_length != other._length || _bpp != other._bpp) {
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_pixels = (byte *)gl_realloc(_pixels, other._length * other._bpp);
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_length = other._length;
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_bpp = other._bpp;
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}
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memcpy(_pixels, other._pixels, _length * _bpp);
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return *this;
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}
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Line(const Line& other) : _x(other._x), _y(other._y), _bpp(other._bpp), _length(other._length) {
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_pixels = (byte *)gl_zalloc(_length * _bpp);
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memcpy(_pixels, other._pixels, _length * _bpp);
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}
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~Line() {
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gl_free(_pixels);
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}
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};
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bool clipBlitImage(TinyGL::GLContext *c, int &srcX, int &srcY, int &srcWidth, int &srcHeight, int &width, int &height, int &dstX, int &dstY, int &clampWidth, int &clampHeight) {
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if (srcWidth == 0 || srcHeight == 0) {
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srcWidth = _surface.w;
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srcHeight = _surface.h;
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}
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if (width == 0 && height == 0) {
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width = srcWidth;
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height = srcHeight;
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}
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const Common::Rect &clippingRect = c->fb->getClippingRectangle();
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if (dstX >= clippingRect.right || dstY >= clippingRect.bottom)
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return false;
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if (dstX + width < clippingRect.left || dstY + height < clippingRect.top) {
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return false;
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}
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if (dstX < clippingRect.left) {
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srcX += (clippingRect.left - dstX);
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width -= (clippingRect.left - dstX);
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dstX = clippingRect.left;
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}
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if (dstY < clippingRect.top) {
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srcY += (clippingRect.top - dstY);
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height -= (clippingRect.top - dstY);
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dstY = clippingRect.top;
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}
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if (width < 0 || height < 0) {
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return false;
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}
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if (dstX + width >= clippingRect.right) {
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clampWidth = clippingRect.right - dstX;
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} else {
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clampWidth = width;
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}
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if (dstY + height >= clippingRect.bottom) {
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clampHeight = clippingRect.bottom - dstY;
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} else {
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clampHeight = height;
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}
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return true;
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}
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// Blits an image to the z buffer.
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// The function only supports clipped blitting without any type of transformation or tinting.
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void tglBlitZBuffer(int dstX, int dstY) {
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TinyGL::GLContext *c = TinyGL::gl_get_context();
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assert(_zBuffer);
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int clampWidth, clampHeight;
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int width = _surface.w, height = _surface.h;
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int srcWidth = 0, srcHeight = 0;
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int srcX = 0, srcY = 0;
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if (clipBlitImage(c, srcX, srcY, srcWidth, srcHeight, width, height, dstX, dstY, clampWidth, clampHeight) == false)
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return;
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int fbWidth = c->fb->getPixelBufferWidth();
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Graphics::PixelBuffer srcBuf(_surface.format, (byte *)const_cast<void *>(_surface.getPixels())); // Blit image buffer
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Graphics::PixelBuffer dstBuf(_surface.format, (byte *)const_cast<uint *>(c->fb->getZBuffer())); // TinyGL z buffer
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srcBuf.shiftBy(srcY * _surface.w);
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dstBuf.shiftBy(dstY * fbWidth);
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for (int y = 0; y < clampHeight; y++) {
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dstBuf.copyBuffer(dstX, srcX, clampWidth, srcBuf);
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dstBuf.shiftBy(fbWidth);
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srcBuf.shiftBy(_surface.w);
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}
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}
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void tglBlitOpaque(int dstX, int dstY, int srcX, int srcY, int srcWidth, int srcHeight);
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template <bool kDisableColoring, bool kDisableBlending, bool kEnableAlphaBlending>
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void tglBlitRLE(int dstX, int dstY, int srcX, int srcY, int srcWidth, int srcHeight, float aTint, float rTint, float gTint, float bTint);
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template <bool kDisableBlending, bool kDisableColoring, bool kFlipVertical, bool kFlipHorizontal>
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void tglBlitSimple(int dstX, int dstY, int srcX, int srcY, int srcWidth, int srcHeight, float aTint, float rTint, float gTint, float bTint);
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template <bool kDisableBlending, bool kDisableColoring, bool kFlipVertical, bool kFlipHorizontal>
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void tglBlitScale(int dstX, int dstY, int width, int height, int srcX, int srcY, int srcWidth, int srcHeight, float aTint, float rTint, float gTint, float bTint);
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template <bool kDisableBlending, bool kDisableColoring, bool kFlipVertical, bool kFlipHorizontal>
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void tglBlitRotoScale(int dstX, int dstY, int width, int height, int srcX, int srcY, int srcWidth, int srcHeight, int rotation,
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int originX, int originY, float aTint, float rTint, float gTint, float bTint);
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//Utility function that calls the correct blitting function.
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template <bool kDisableBlending, bool kDisableColoring, bool kDisableTransform, bool kFlipVertical, bool kFlipHorizontal, bool kEnableAlphaBlending, bool kEnableOpaqueBlit>
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void tglBlitGeneric(const BlitTransform &transform) {
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assert(!_zBuffer);
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if (kDisableTransform) {
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if (kEnableOpaqueBlit && kDisableColoring && kFlipVertical == false && kFlipHorizontal == false) {
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tglBlitOpaque(transform._destinationRectangle.left, transform._destinationRectangle.top,
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transform._sourceRectangle.left, transform._sourceRectangle.top,
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transform._sourceRectangle.width() , transform._sourceRectangle.height());
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} else if ((kDisableBlending || kEnableAlphaBlending) && kFlipVertical == false && kFlipHorizontal == false) {
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tglBlitRLE<kDisableColoring, kDisableBlending, kEnableAlphaBlending>(transform._destinationRectangle.left,
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transform._destinationRectangle.top, transform._sourceRectangle.left, transform._sourceRectangle.top,
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transform._sourceRectangle.width() , transform._sourceRectangle.height(), transform._aTint,
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transform._rTint, transform._gTint, transform._bTint);
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} else {
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tglBlitSimple<kDisableBlending, kDisableColoring, kFlipVertical, kFlipHorizontal>(transform._destinationRectangle.left,
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transform._destinationRectangle.top, transform._sourceRectangle.left, transform._sourceRectangle.top,
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transform._sourceRectangle.width() , transform._sourceRectangle.height(),
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transform._aTint, transform._rTint, transform._gTint, transform._bTint);
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}
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} else {
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if (transform._rotation == 0) {
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tglBlitScale<kDisableBlending, kDisableColoring, kFlipVertical, kFlipHorizontal>(transform._destinationRectangle.left,
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transform._destinationRectangle.top, transform._destinationRectangle.width(), transform._destinationRectangle.height(),
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transform._sourceRectangle.left, transform._sourceRectangle.top, transform._sourceRectangle.width(), transform._sourceRectangle.height(),
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transform._aTint, transform._rTint, transform._gTint, transform._bTint);
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} else {
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tglBlitRotoScale<kDisableBlending, kDisableColoring, kFlipVertical, kFlipHorizontal>(transform._destinationRectangle.left,
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transform._destinationRectangle.top, transform._destinationRectangle.width(), transform._destinationRectangle.height(),
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transform._sourceRectangle.left, transform._sourceRectangle.top, transform._sourceRectangle.width(),
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transform._sourceRectangle.height(), transform._rotation, transform._originX, transform._originY, transform._aTint,
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transform._rTint, transform._gTint, transform._bTint);
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}
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}
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}
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int getWidth() const { return _surface.w; }
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int getHeight() const { return _surface.h; }
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void incRefCount() { _refcount++; }
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void dispose() { if (--_refcount == 0) _isDisposed = true; }
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bool isDisposed() const { return _isDisposed; }
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bool isOpaque() const { return _opaque; }
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private:
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bool _isDisposed;
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bool _binaryTransparent;
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bool _opaque;
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bool _zBuffer;
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Common::Array<Line> _lines;
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Graphics::Surface _surface;
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int _version;
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int _refcount;
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};
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} // end of namespace TinyGL
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void tglGetBlitImageSize(TinyGL::BlitImage *blitImage, int &width, int &height) {
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width = blitImage->getWidth();
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height = blitImage->getHeight();
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}
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void tglIncBlitImageRef(TinyGL::BlitImage *blitImage) {
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blitImage->incRefCount();
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}
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int tglGetBlitImageVersion(TinyGL::BlitImage *blitImage) {
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return blitImage->getVersion();
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}
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TinyGL::BlitImage *tglGenBlitImage() {
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TinyGL::GLContext *c = TinyGL::gl_get_context();
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TinyGL::BlitImage *image = new TinyGL::BlitImage();
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c->_blitImages.push_back(image);
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return image;
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}
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void tglUploadBlitImage(TinyGL::BlitImage *blitImage, const Graphics::Surface& surface, uint32 colorKey, bool applyColorKey, bool zBuffer) {
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if (blitImage != nullptr) {
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blitImage->loadData(surface, colorKey, applyColorKey, zBuffer);
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}
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}
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void tglDeleteBlitImage(TinyGL::BlitImage *blitImage) {
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if (blitImage != nullptr) {
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blitImage->dispose();
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}
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}
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namespace TinyGL {
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void BlitImage::tglBlitOpaque(int dstX, int dstY, int srcX, int srcY, int srcWidth, int srcHeight) {
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GLContext *c = gl_get_context();
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int clampWidth, clampHeight;
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int width = srcWidth, height = srcHeight;
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if (clipBlitImage(c, srcX, srcY, srcWidth, srcHeight, width, height, dstX, dstY, clampWidth, clampHeight) == false)
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return;
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int fbPitch = c->fb->getPixelBufferPitch();
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int fbBpp = c->fb->getPixelBufferBpp();
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byte *fbBuf = c->fb->getPixelBuffer() + (dstX * fbBpp) + (dstY * fbPitch);
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Graphics::crossBlit(fbBuf, (const byte *)_surface.getBasePtr(srcX, srcY),
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fbPitch, _surface.pitch, clampWidth, clampHeight,
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c->fb->getPixelFormat(), _surface.format);
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}
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// This function uses RLE encoding to skip transparent bitmap parts
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// This blit only supports tinting but it will fall back to simpleBlit
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// if flipping is required (or anything more complex than that, including rotationd and scaling).
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template <bool kDisableColoring, bool kDisableBlending, bool kEnableAlphaBlending>
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void BlitImage::tglBlitRLE(int dstX, int dstY, int srcX, int srcY, int srcWidth, int srcHeight, float aTint, float rTint, float gTint, float bTint) {
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GLContext *c = gl_get_context();
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int clampWidth, clampHeight;
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int width = srcWidth, height = srcHeight;
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if (clipBlitImage(c, srcX, srcY, srcWidth, srcHeight, width, height, dstX, dstY, clampWidth, clampHeight) == false)
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return;
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if (aTint <= 0.0f)
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return;
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int fbWidth = c->fb->getPixelBufferWidth();
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Graphics::PixelBuffer srcBuf(_surface.format, (byte *)_surface.getPixels());
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srcBuf.shiftBy(srcX + (srcY * _surface.w));
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Graphics::PixelBuffer dstBuf(c->fb->getPixelFormat(), c->fb->getPixelBuffer());
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dstBuf.shiftBy(dstY * fbWidth + dstX);
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int kBytesPerPixel = c->fb->getPixelFormat().bytesPerPixel;
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uint32 lineIndex = 0;
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int maxY = srcY + clampHeight;
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int maxX = srcX + clampWidth;
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while (lineIndex < _lines.size() && _lines[lineIndex]._y < srcY) {
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lineIndex++;
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||||
}
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||||
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if (_opaque) { // This is the degenerate case of RLE where the whole image is affected
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for (int y = 0; y < clampHeight; y++) {
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if (kDisableColoring) {
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memcpy(dstBuf.getRawBuffer(y * fbWidth),
|
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srcBuf.getRawBuffer(y * _surface.w), clampWidth * kBytesPerPixel);
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||||
} else {
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||||
for(int x = 0; x < clampWidth; x++) {
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byte aDst, rDst, gDst, bDst;
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srcBuf.getARGBAt(y * _surface.w + x, aDst, rDst, gDst, bDst);
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c->fb->writePixel((dstX + x) + (dstY + y) * fbWidth, aDst * aTint, rDst * rTint, gDst * gTint, bDst * bTint);
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||||
}
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||||
}
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||||
}
|
||||
} else if (_binaryTransparent || (kDisableBlending || !kEnableAlphaBlending)) { // If bitmap is binary transparent or if we need complex forms of blending (not just alpha) we need to use writePixel, which is slower
|
||||
while (lineIndex < _lines.size() && _lines[lineIndex]._y < maxY) {
|
||||
const BlitImage::Line &l = _lines[lineIndex];
|
||||
if (l._x < maxX && l._x + l._length > srcX) {
|
||||
int length = l._length;
|
||||
int skipStart = (l._x < srcX) ? (srcX - l._x) : 0;
|
||||
length -= skipStart;
|
||||
int skipEnd = (l._x + l._length > maxX) ? (l._x + l._length - maxX) : 0;
|
||||
length -= skipEnd;
|
||||
int xStart = MAX(l._x - srcX, 0);
|
||||
if (kDisableColoring) {
|
||||
memcpy(dstBuf.getRawBuffer((l._y - srcY) * fbWidth + xStart),
|
||||
l._pixels + skipStart * kBytesPerPixel, length * kBytesPerPixel);
|
||||
} else {
|
||||
for(int x = xStart; x < xStart + length; x++) {
|
||||
byte aDst, rDst, gDst, bDst;
|
||||
srcBuf.getARGBAt((l._y - srcY) * _surface.w + x, aDst, rDst, gDst, bDst);
|
||||
c->fb->writePixel((dstX + x) + (dstY + (l._y - srcY)) * fbWidth, aDst * aTint, rDst * rTint, gDst * gTint, bDst * bTint);
|
||||
}
|
||||
}
|
||||
}
|
||||
lineIndex++;
|
||||
}
|
||||
} else { // Otherwise can use setPixel in some cases which speeds up things quite a bit
|
||||
while (lineIndex < _lines.size() && _lines[lineIndex]._y < maxY) {
|
||||
const BlitImage::Line &l = _lines[lineIndex];
|
||||
if (l._x < maxX && l._x + l._length > srcX) {
|
||||
int length = l._length;
|
||||
int skipStart = (l._x < srcX) ? (srcX - l._x) : 0;
|
||||
length -= skipStart;
|
||||
int skipEnd = (l._x + l._length > maxX) ? (l._x + l._length - maxX) : 0;
|
||||
length -= skipEnd;
|
||||
int xStart = MAX(l._x - srcX, 0);
|
||||
if (kDisableColoring && (kEnableAlphaBlending == false || kDisableBlending)) {
|
||||
memcpy(dstBuf.getRawBuffer((l._y - srcY) * fbWidth + xStart),
|
||||
l._pixels + skipStart * kBytesPerPixel, length * kBytesPerPixel);
|
||||
} else {
|
||||
for(int x = xStart; x < xStart + length; x++) {
|
||||
byte aDst, rDst, gDst, bDst;
|
||||
srcBuf.getARGBAt((l._y - srcY) * _surface.w + x, aDst, rDst, gDst, bDst);
|
||||
if (kDisableColoring) {
|
||||
if (aDst != 0xFF) {
|
||||
c->fb->writePixel((dstX + x) + (dstY + (l._y - srcY)) * fbWidth, aDst, rDst, gDst, bDst);
|
||||
} else {
|
||||
dstBuf.setPixelAt(x + (l._y - srcY) * fbWidth, aDst, rDst, gDst, bDst);
|
||||
}
|
||||
} else {
|
||||
c->fb->writePixel((dstX + x) + (dstY + (l._y - srcY)) * fbWidth, aDst * aTint, rDst * rTint, gDst * gTint, bDst * bTint);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
lineIndex++;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// This blit function is called when flipping is needed but transformation isn't.
|
||||
template <bool kDisableBlending, bool kDisableColoring, bool kFlipVertical, bool kFlipHorizontal>
|
||||
void BlitImage::tglBlitSimple(int dstX, int dstY, int srcX, int srcY, int srcWidth, int srcHeight, float aTint, float rTint, float gTint, float bTint) {
|
||||
GLContext *c = gl_get_context();
|
||||
|
||||
int clampWidth, clampHeight;
|
||||
int width = srcWidth, height = srcHeight;
|
||||
if (clipBlitImage(c, srcX, srcY, srcWidth, srcHeight, width, height, dstX, dstY, clampWidth, clampHeight) == false)
|
||||
return;
|
||||
|
||||
Graphics::PixelBuffer srcBuf(_surface.format, (byte *)_surface.getPixels());
|
||||
|
||||
if (kFlipVertical) {
|
||||
srcBuf.shiftBy(((srcHeight - srcY - 1) * _surface.w));
|
||||
} else {
|
||||
srcBuf.shiftBy((srcY * _surface.w));
|
||||
}
|
||||
|
||||
Graphics::PixelBuffer dstBuf(c->fb->getPixelFormat(), c->fb->getPixelBuffer());
|
||||
int fbWidth = c->fb->getPixelBufferWidth();
|
||||
|
||||
for (int y = 0; y < clampHeight; y++) {
|
||||
for (int x = 0; x < clampWidth; ++x) {
|
||||
byte aDst, rDst, gDst, bDst;
|
||||
if (kFlipHorizontal) {
|
||||
srcBuf.getARGBAt(srcX + clampWidth - x, aDst, rDst, gDst, bDst);
|
||||
} else {
|
||||
srcBuf.getARGBAt(srcX + x, aDst, rDst, gDst, bDst);
|
||||
}
|
||||
|
||||
// Those branches are needed to favor speed: avoiding writePixel always yield a huge performance boost when blitting images.
|
||||
if (kDisableColoring) {
|
||||
if (kDisableBlending && aDst != 0) {
|
||||
dstBuf.setPixelAt((dstX + x) + (dstY + y) * fbWidth, aDst, rDst, gDst, bDst);
|
||||
} else {
|
||||
c->fb->writePixel((dstX + x) + (dstY + y) * fbWidth, aDst, rDst, gDst, bDst);
|
||||
}
|
||||
} else {
|
||||
if (kDisableBlending && aDst * aTint != 0) {
|
||||
dstBuf.setPixelAt((dstX + x) + (dstY + y) * fbWidth, aDst * aTint, rDst * rTint, gDst * gTint, bDst * bTint);
|
||||
} else {
|
||||
c->fb->writePixel((dstX + x) + (dstY + y) * fbWidth, aDst * aTint, rDst * rTint, gDst * gTint, bDst * bTint);
|
||||
}
|
||||
}
|
||||
}
|
||||
if (kFlipVertical) {
|
||||
srcBuf.shiftBy(-_surface.w);
|
||||
} else {
|
||||
srcBuf.shiftBy(_surface.w);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// This function is called when scale is needed: it uses a simple nearest
|
||||
// filter to scale the blit image before copying it to the screen.
|
||||
template <bool kDisableBlending, bool kDisableColoring, bool kFlipVertical, bool kFlipHorizontal>
|
||||
void BlitImage::tglBlitScale(int dstX, int dstY, int width, int height, int srcX, int srcY, int srcWidth, int srcHeight,
|
||||
float aTint, float rTint, float gTint, float bTint) {
|
||||
GLContext *c = gl_get_context();
|
||||
|
||||
int clampWidth, clampHeight;
|
||||
if (clipBlitImage(c, srcX, srcY, srcWidth, srcHeight, width, height, dstX, dstY, clampWidth, clampHeight) == false)
|
||||
return;
|
||||
|
||||
Graphics::PixelBuffer srcBuf(_surface.format, (byte *)_surface.getPixels());
|
||||
srcBuf.shiftBy(srcX + (srcY * _surface.w));
|
||||
|
||||
Graphics::PixelBuffer dstBuf(c->fb->getPixelFormat(), c->fb->getPixelBuffer());
|
||||
int fbWidth = c->fb->getPixelBufferWidth();
|
||||
|
||||
for (int y = 0; y < clampHeight; y++) {
|
||||
for (int x = 0; x < clampWidth; ++x) {
|
||||
byte aDst, rDst, gDst, bDst;
|
||||
int xSource, ySource;
|
||||
if (kFlipVertical) {
|
||||
ySource = clampHeight - y - 1;
|
||||
} else {
|
||||
ySource = y;
|
||||
}
|
||||
|
||||
if (kFlipHorizontal) {
|
||||
xSource = clampWidth - x - 1;
|
||||
} else {
|
||||
xSource = x;
|
||||
}
|
||||
|
||||
srcBuf.getARGBAt(((ySource * srcHeight) / height) * _surface.w + ((xSource * srcWidth) / width), aDst, rDst, gDst, bDst);
|
||||
|
||||
if (kDisableColoring) {
|
||||
if (kDisableBlending && aDst != 0) {
|
||||
dstBuf.setPixelAt((dstX + x) + (dstY + y) * fbWidth, aDst, rDst, gDst, bDst);
|
||||
} else {
|
||||
c->fb->writePixel((dstX + x) + (dstY + y) * fbWidth, aDst, rDst, gDst, bDst);
|
||||
}
|
||||
} else {
|
||||
if (kDisableBlending && aDst * aTint != 0) {
|
||||
dstBuf.setPixelAt((dstX + x) + (dstY + y) * fbWidth, aDst * aTint, rDst * rTint, gDst * gTint, bDst * bTint);
|
||||
} else {
|
||||
c->fb->writePixel((dstX + x) + (dstY + y) * fbWidth, aDst * aTint, rDst * rTint, gDst * gTint, bDst * bTint);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
|
||||
The below two functions are adapted from SDL_rotozoom.c,
|
||||
taken from SDL_gfx-2.0.18.
|
||||
|
||||
Its copyright notice:
|
||||
|
||||
=============================================================================
|
||||
SDL_rotozoom.c: rotozoomer, zoomer and shrinker for 32bit or 8bit surfaces
|
||||
|
||||
Copyright (C) 2001-2012 Andreas Schiffler
|
||||
|
||||
This software is provided 'as-is', without any express or implied
|
||||
warranty. In no event will the authors be held liable for any damages
|
||||
arising from the use of this software.
|
||||
|
||||
Permission is granted to anyone to use this software for any purpose,
|
||||
including commercial applications, and to alter it and redistribute it
|
||||
freely, subject to the following restrictions:
|
||||
|
||||
1. The origin of this software must not be misrepresented; you must not
|
||||
claim that you wrote the original software. If you use this software
|
||||
in a product, an acknowledgment in the product documentation would be
|
||||
appreciated but is not required.
|
||||
|
||||
2. Altered source versions must be plainly marked as such, and must not be
|
||||
misrepresented as being the original software.
|
||||
|
||||
3. This notice may not be removed or altered from any source
|
||||
distribution.
|
||||
|
||||
Andreas Schiffler -- aschiffler at ferzkopp dot net
|
||||
=============================================================================
|
||||
|
||||
|
||||
The functions have been adapted for different structures and coordinate
|
||||
systems.
|
||||
|
||||
*/
|
||||
|
||||
template <bool kDisableBlending, bool kDisableColoring, bool kFlipVertical, bool kFlipHorizontal>
|
||||
void BlitImage::tglBlitRotoScale(int dstX, int dstY, int width, int height, int srcX, int srcY, int srcWidth, int srcHeight, int rotation,
|
||||
int originX, int originY, float aTint, float rTint, float gTint, float bTint) {
|
||||
GLContext *c = gl_get_context();
|
||||
|
||||
int clampWidth, clampHeight;
|
||||
if (clipBlitImage(c, srcX, srcY, srcWidth, srcHeight, width, height, dstX, dstY, clampWidth, clampHeight) == false)
|
||||
return;
|
||||
|
||||
Graphics::PixelBuffer srcBuf(_surface.format, (byte *)_surface.getPixels());
|
||||
srcBuf.shiftBy(srcX + (srcY * _surface.w));
|
||||
int fbWidth = c->fb->getPixelBufferWidth();
|
||||
|
||||
Graphics::PixelBuffer dstBuf(c->fb->getPixelFormat(), c->fb->getPixelBuffer());
|
||||
|
||||
// Transform destination rectangle accordingly.
|
||||
Common::Rect destinationRectangle = rotateRectangle(dstX, dstY, width, height, rotation, originX, originY);
|
||||
|
||||
if (dstX + destinationRectangle.width() > fbWidth)
|
||||
clampWidth = fbWidth - dstX;
|
||||
else
|
||||
clampWidth = destinationRectangle.width();
|
||||
if (dstY + destinationRectangle.height() > c->fb->getPixelBufferHeight())
|
||||
clampHeight = c->fb->getPixelBufferHeight() - dstY;
|
||||
else
|
||||
clampHeight = destinationRectangle.height();
|
||||
|
||||
uint32 invAngle = 360 - (rotation % 360);
|
||||
float invCos = cos(invAngle * (float)M_PI / 180.0f);
|
||||
float invSin = sin(invAngle * (float)M_PI / 180.0f);
|
||||
|
||||
int icosx = (int)(invCos * (65536.0f * srcWidth / width));
|
||||
int isinx = (int)(invSin * (65536.0f * srcWidth / width));
|
||||
int icosy = (int)(invCos * (65536.0f * srcHeight / height));
|
||||
int isiny = (int)(invSin * (65536.0f * srcHeight / height));
|
||||
|
||||
int xd = (srcX + originX) << 16;
|
||||
int yd = (srcY + originY) << 16;
|
||||
int cx = originX * ((float)width / srcWidth);
|
||||
int cy = originY * ((float)height / srcHeight);
|
||||
|
||||
int ax = -icosx * cx;
|
||||
int ay = -isiny * cx;
|
||||
int sw = width - 1;
|
||||
int sh = height - 1;
|
||||
|
||||
for (int y = 0; y < clampHeight; y++) {
|
||||
int t = cy - y;
|
||||
int sdx = ax + (isinx * t) + xd;
|
||||
int sdy = ay - (icosy * t) + yd;
|
||||
for (int x = 0; x < clampWidth; ++x) {
|
||||
byte aDst, rDst, gDst, bDst;
|
||||
|
||||
int dx = (sdx >> 16);
|
||||
int dy = (sdy >> 16);
|
||||
|
||||
if (kFlipHorizontal) {
|
||||
dx = sw - dx;
|
||||
}
|
||||
|
||||
if (kFlipVertical) {
|
||||
dy = sh - dy;
|
||||
}
|
||||
|
||||
if ((dx >= 0) && (dy >= 0) && (dx < srcWidth) && (dy < srcHeight)) {
|
||||
srcBuf.getARGBAt(dy * _surface.w + dx, aDst, rDst, gDst, bDst);
|
||||
if (kDisableColoring) {
|
||||
if (kDisableBlending && aDst != 0) {
|
||||
dstBuf.setPixelAt((dstX + x) + (dstY + y) * fbWidth, aDst, rDst, gDst, bDst);
|
||||
} else {
|
||||
c->fb->writePixel((dstX + x) + (dstY + y) * fbWidth, aDst, rDst, gDst, bDst);
|
||||
}
|
||||
} else {
|
||||
if (kDisableBlending && aDst * aTint != 0) {
|
||||
dstBuf.setPixelAt((dstX + x) + (dstY + y) * fbWidth, aDst * aTint, rDst * rTint, gDst * gTint, bDst * bTint);
|
||||
} else {
|
||||
c->fb->writePixel((dstX + x) + (dstY + y) * fbWidth, aDst * aTint, rDst * rTint, gDst * gTint, bDst * bTint);
|
||||
}
|
||||
}
|
||||
}
|
||||
sdx += icosx;
|
||||
sdy += isiny;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
} // end of namespace TinyGL
|
||||
|
||||
void tglBlit(TinyGL::BlitImage *blitImage, int x, int y) {
|
||||
TinyGL::GLContext *c = TinyGL::gl_get_context();
|
||||
TinyGL::BlitTransform transform(x, y);
|
||||
c->issueDrawCall(new TinyGL::BlittingDrawCall(blitImage, transform, TinyGL::BlittingDrawCall::BlitMode_Regular));
|
||||
}
|
||||
|
||||
void tglBlit(TinyGL::BlitImage *blitImage, const TinyGL::BlitTransform &transform) {
|
||||
TinyGL::GLContext *c = TinyGL::gl_get_context();
|
||||
c->issueDrawCall(new TinyGL::BlittingDrawCall(blitImage, transform, TinyGL::BlittingDrawCall::BlitMode_Regular));
|
||||
}
|
||||
|
||||
void tglBlitFast(TinyGL::BlitImage *blitImage, int x, int y) {
|
||||
TinyGL::GLContext *c = TinyGL::gl_get_context();
|
||||
TinyGL::BlitTransform transform(x, y);
|
||||
c->issueDrawCall(new TinyGL::BlittingDrawCall(blitImage, transform, TinyGL::BlittingDrawCall::BlitMode_Fast));
|
||||
}
|
||||
|
||||
void tglBlitZBuffer(TinyGL::BlitImage *blitImage, int x, int y) {
|
||||
TinyGL::GLContext *c = TinyGL::gl_get_context();
|
||||
TinyGL::BlitTransform transform(x, y);
|
||||
c->issueDrawCall(new TinyGL::BlittingDrawCall(blitImage, transform, TinyGL::BlittingDrawCall::BlitMode_ZBuffer));
|
||||
}
|
||||
|
||||
|
||||
namespace TinyGL {
|
||||
namespace Internal {
|
||||
|
||||
template <bool kEnableAlphaBlending, bool kEnableOpaqueBlit, bool kDisableColor, bool kDisableTransform, bool kDisableBlend>
|
||||
void tglBlit(BlitImage *blitImage, const BlitTransform &transform) {
|
||||
if (transform._flipHorizontally) {
|
||||
if (transform._flipVertically) {
|
||||
blitImage->tglBlitGeneric<kDisableBlend, kDisableColor, kDisableTransform, true, true, kEnableAlphaBlending, kEnableOpaqueBlit>(transform);
|
||||
} else {
|
||||
blitImage->tglBlitGeneric<kDisableBlend, kDisableColor, kDisableTransform, false, true, kEnableAlphaBlending, kEnableOpaqueBlit>(transform);
|
||||
}
|
||||
} else if (transform._flipVertically) {
|
||||
blitImage->tglBlitGeneric<kDisableBlend, kDisableColor, kDisableTransform, true, false, kEnableAlphaBlending, kEnableOpaqueBlit>(transform);
|
||||
} else {
|
||||
blitImage->tglBlitGeneric<kDisableBlend, kDisableColor, kDisableTransform, false, false, kEnableAlphaBlending, kEnableOpaqueBlit>(transform);
|
||||
}
|
||||
}
|
||||
|
||||
template <bool kEnableAlphaBlending, bool kEnableOpaqueBlit, bool kDisableColor, bool kDisableTransform>
|
||||
void tglBlit(BlitImage *blitImage, const BlitTransform &transform, bool disableBlend) {
|
||||
if (disableBlend) {
|
||||
tglBlit<kEnableAlphaBlending, kEnableOpaqueBlit, kDisableColor, kDisableTransform, true>(blitImage, transform);
|
||||
} else {
|
||||
tglBlit<kEnableAlphaBlending, kEnableOpaqueBlit, kDisableColor, kDisableTransform, false>(blitImage, transform);
|
||||
}
|
||||
}
|
||||
|
||||
template <bool kEnableAlphaBlending, bool kEnableOpaqueBlit, bool kDisableColor>
|
||||
void tglBlit(BlitImage *blitImage, const BlitTransform &transform, bool disableTransform, bool disableBlend) {
|
||||
if (disableTransform) {
|
||||
tglBlit<kEnableAlphaBlending, kEnableOpaqueBlit, kDisableColor, true>(blitImage, transform, disableBlend);
|
||||
} else {
|
||||
tglBlit<kEnableAlphaBlending, kEnableOpaqueBlit, kDisableColor, false>(blitImage, transform, disableBlend);
|
||||
}
|
||||
}
|
||||
|
||||
template <bool kEnableAlphaBlending, bool kEnableOpaqueBlit>
|
||||
void tglBlit(BlitImage *blitImage, const BlitTransform &transform, bool disableColor, bool disableTransform, bool disableBlend) {
|
||||
if (disableColor) {
|
||||
tglBlit<kEnableAlphaBlending, kEnableOpaqueBlit, true>(blitImage, transform, disableTransform, disableBlend);
|
||||
} else {
|
||||
tglBlit<kEnableAlphaBlending, kEnableOpaqueBlit, false>(blitImage, transform, disableTransform, disableBlend);
|
||||
}
|
||||
}
|
||||
|
||||
template <bool kEnableAlphaBlending>
|
||||
void tglBlit(BlitImage *blitImage, const BlitTransform &transform, bool enableOpaqueBlit, bool disableColor, bool disableTransform, bool disableBlend) {
|
||||
if (enableOpaqueBlit) {
|
||||
tglBlit<kEnableAlphaBlending, true>(blitImage, transform, disableColor, disableTransform, disableBlend);
|
||||
} else {
|
||||
tglBlit<kEnableAlphaBlending, false>(blitImage, transform, disableColor, disableTransform, disableBlend);
|
||||
}
|
||||
}
|
||||
|
||||
void tglBlit(BlitImage *blitImage, const BlitTransform &transform) {
|
||||
GLContext *c = gl_get_context();
|
||||
bool disableColor = transform._aTint == 1.0f && transform._bTint == 1.0f && transform._gTint == 1.0f && transform._rTint == 1.0f;
|
||||
bool disableTransform = transform._destinationRectangle.width() == 0 && transform._destinationRectangle.height() == 0 && transform._rotation == 0;
|
||||
bool disableBlend = c->blending_enabled == false;
|
||||
bool enableAlphaBlending = c->source_blending_factor == TGL_SRC_ALPHA && c->destination_blending_factor == TGL_ONE_MINUS_SRC_ALPHA;
|
||||
bool enableOpaqueBlit = blitImage->isOpaque()
|
||||
&& (c->source_blending_factor == TGL_ONE || c->source_blending_factor == TGL_SRC_ALPHA)
|
||||
&& (c->destination_blending_factor == TGL_ZERO || c->destination_blending_factor == TGL_ONE_MINUS_SRC_ALPHA);
|
||||
|
||||
if (enableAlphaBlending) {
|
||||
tglBlit<true>(blitImage, transform, enableOpaqueBlit, disableColor, disableTransform, disableBlend);
|
||||
} else {
|
||||
tglBlit<false>(blitImage, transform, enableOpaqueBlit, disableColor, disableTransform, disableBlend);
|
||||
}
|
||||
}
|
||||
|
||||
void tglBlitFast(BlitImage *blitImage, int x, int y) {
|
||||
BlitTransform transform(x, y);
|
||||
if (blitImage->isOpaque()) {
|
||||
blitImage->tglBlitGeneric<true, true, true, false, false, false, true>(transform);
|
||||
} else {
|
||||
blitImage->tglBlitGeneric<true, true, true, false, false, false, false>(transform);
|
||||
}
|
||||
}
|
||||
|
||||
void tglBlitZBuffer(BlitImage *blitImage, int x, int y) {
|
||||
blitImage->tglBlitZBuffer(x, y);
|
||||
}
|
||||
|
||||
void tglCleanupImages() {
|
||||
GLContext *c = gl_get_context();
|
||||
Common::List<BlitImage *>::iterator it = c->_blitImages.begin();
|
||||
while (it != c->_blitImages.end()) {
|
||||
if ((*it)->isDisposed()) {
|
||||
delete (*it);
|
||||
it = c->_blitImages.erase(it);
|
||||
} else {
|
||||
++it;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
} // end of namespace Internal
|
||||
|
||||
Common::Point transformPoint(float x, float y, int rotation) {
|
||||
float rotateRad = rotation * (float)M_PI / 180.0f;
|
||||
Common::Point newPoint;
|
||||
newPoint.x = x * cos(rotateRad) - y * sin(rotateRad);
|
||||
newPoint.y = x * sin(rotateRad) + y * cos(rotateRad);
|
||||
return newPoint;
|
||||
}
|
||||
|
||||
Common::Rect rotateRectangle(int x, int y, int width, int height, int rotation, int originX, int originY) {
|
||||
Common::Point nw, ne, sw, se;
|
||||
nw = transformPoint(x - originX, y - originY, rotation);
|
||||
ne = transformPoint(x + width - originX, y - originY, rotation);
|
||||
sw = transformPoint(x + width - originX, y + height - originY, rotation);
|
||||
se = transformPoint(x - originX, y + height - originY, rotation);
|
||||
|
||||
float top = MIN(nw.y, MIN(ne.y, MIN(sw.y, se.y)));
|
||||
float bottom = MAX(nw.y, MAX(ne.y, MAX(sw.y, se.y)));
|
||||
float left = MIN(nw.x, MIN(ne.x, MIN(sw.x, se.x)));
|
||||
float right = MAX(nw.x, MAX(ne.x, MAX(sw.x, se.x)));
|
||||
|
||||
Common::Rect res;
|
||||
res.top = (int32)(floor(top)) + originY;
|
||||
res.bottom = (int32)(ceil(bottom)) + originY;
|
||||
res.left = (int32)(floor(left)) + originX;
|
||||
res.right = (int32)(ceil(right)) + originX;
|
||||
|
||||
return res;
|
||||
}
|
||||
|
||||
} // end of namespace TinyGL
|
||||
Reference in New Issue
Block a user