/* * Copyright (c) 2010-2012 OTClient * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ #include "painter.h" #include "graphics.h" Painter *g_painter = nullptr; Painter::Painter() { m_glTextureId = 0; m_oldStateIndex = 0; m_color = Color::white; m_opacity = 1.0f; m_compositionMode = CompositionMode_Normal; m_shaderProgram = nullptr; m_texture = nullptr; } void Painter::resetState() { resetColor(); resetOpacity(); resetCompositionMode(); resetClipRect(); resetShaderProgram(); resetTexture(); } void Painter::refreshState() { updateGlCompositionMode(); updateGlClipRect(); updateGlTexture(); } void Painter::saveAndResetState() { assert(m_oldStateIndex<10); m_olderStates[m_oldStateIndex].projectionMatrix = m_projectionMatrix; m_olderStates[m_oldStateIndex].textureMatrix = m_textureMatrix; m_olderStates[m_oldStateIndex].color = m_color; m_olderStates[m_oldStateIndex].opacity = m_opacity; m_olderStates[m_oldStateIndex].compositionMode = m_compositionMode; m_olderStates[m_oldStateIndex].clipRect = m_clipRect; m_olderStates[m_oldStateIndex].shaderProgram = m_shaderProgram; m_olderStates[m_oldStateIndex].texture = m_texture; m_oldStateIndex++; resetState(); } void Painter::restoreSavedState() { m_oldStateIndex--; setProjectionMatrix(m_olderStates[m_oldStateIndex].projectionMatrix); setTextureMatrix(m_olderStates[m_oldStateIndex].textureMatrix); setColor(m_olderStates[m_oldStateIndex].color); setOpacity(m_olderStates[m_oldStateIndex].opacity); setCompositionMode(m_olderStates[m_oldStateIndex].compositionMode); setClipRect(m_olderStates[m_oldStateIndex].clipRect); setShaderProgram(m_olderStates[m_oldStateIndex].shaderProgram); setTexture(m_olderStates[m_oldStateIndex].texture); } void Painter::setCompositionMode(Painter::CompositionMode compositionMode) { if(m_compositionMode == compositionMode) return; m_compositionMode = compositionMode; updateGlCompositionMode(); } void Painter::setClipRect(const Rect& clipRect) { if(m_clipRect == clipRect) return; m_clipRect = clipRect; updateGlClipRect(); } void Painter::setTexture(Texture* texture) { if(m_texture == texture) return; m_texture = texture; if(texture) { m_glTextureId = texture->getId(); setTextureMatrix(texture->getTransformMatrix()); } else m_glTextureId = 0; m_texture = texture; updateGlTexture(); } void Painter::updateGlTexture() { glBindTexture(GL_TEXTURE_2D, m_glTextureId); } void Painter::updateGlCompositionMode() { glEnable(GL_BLEND); switch(m_compositionMode) { case CompositionMode_Normal: glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); break; case CompositionMode_Multiply: glBlendFunc(GL_DST_COLOR, GL_ONE_MINUS_SRC_ALPHA); break; case CompositionMode_Add: glBlendFunc(GL_ONE, GL_ONE); break; case CompositionMode_Replace: glBlendFunc(GL_ONE, GL_ZERO); break; case CompositionMode_DestBlending: glBlendFunc(GL_ONE_MINUS_DST_ALPHA, GL_DST_ALPHA); break; } } void Painter::updateGlClipRect() { if(m_clipRect.isValid()) { glEnable(GL_SCISSOR_TEST); glScissor(m_clipRect.left(), g_graphics.getViewportSize().height() - m_clipRect.bottom() - 1, m_clipRect.width(), m_clipRect.height()); } else { glDisable(GL_SCISSOR_TEST); } }