tibia-client/src/framework/graphics/texture.cpp

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/*
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* Copyright (c) 2010-2012 OTClient <https://github.com/edubart/otclient>
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*
* 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.
*/
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#include "texture.h"
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#include "graphics.h"
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#include "framebuffer.h"
#include "image.h"
#include <framework/application.h>
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Texture::Texture()
{
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m_id = 0;
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}
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Texture::Texture(const Size& size)
{
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m_id = 0;
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if(!setupSize(size))
return;
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createTexture();
bind();
setupPixels(0, m_glSize, nullptr, 4);
setupWrap();
setupFilters();
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}
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Texture::Texture(const ImagePtr& image, bool buildMipmaps)
{
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m_id = 0;
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if(!setupSize(image->getSize(), buildMipmaps))
return;
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createTexture();
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ImagePtr glImage = image;
if(m_size != m_glSize) {
glImage = ImagePtr(new Image(m_glSize, image->getBpp()));
glImage->paste(image);
} else
glImage = image;
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bind();
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if(buildMipmaps) {
int level = 0;
do {
setupPixels(level++, glImage->getSize(), glImage->getPixelData(), glImage->getBpp());
} while(glImage->nextMipmap());
m_hasMipmaps = true;
} else
setupPixels(0, glImage->getSize(), glImage->getPixelData(), glImage->getBpp());
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setupWrap();
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setupFilters();
}
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Texture::~Texture()
{
assert(!g_app.isTermianted());
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// free texture from gl memory
if(g_graphics.ok() && m_id != 0)
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glDeleteTextures(1, &m_id);
}
void Texture::bind()
{
// must reset painter texture state
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g_painter->setTexture(this);
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glBindTexture(GL_TEXTURE_2D, m_id);
}
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void Texture::copyFromScreen(const Rect& screenRect)
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{
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bind();
glCopyTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, screenRect.x(), screenRect.y(), screenRect.width(), screenRect.height());
}
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bool Texture::buildHardwareMipmaps()
{
if(!g_graphics.canUseHardwareMipmaps())
return false;
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bind();
if(!m_hasMipmaps) {
m_hasMipmaps = true;
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setupFilters();
}
glGenerateMipmap(GL_TEXTURE_2D);
return true;
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}
void Texture::setSmooth(bool smooth)
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{
if(smooth && !g_graphics.canUseBilinearFiltering())
return;
if(smooth == m_smooth)
return;
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m_smooth = smooth;
bind();
setupFilters();
}
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void Texture::setRepeat(bool repeat)
{
if(m_repeat == repeat)
return;
m_repeat = repeat;
bind();
setupWrap();
}
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void Texture::setUpsideDown(bool upsideDown)
{
if(m_upsideDown == upsideDown)
return;
m_upsideDown = upsideDown;
setupTranformMatrix();
}
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void Texture::createTexture()
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{
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glGenTextures(1, &m_id);
assert(m_id != 0);
}
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bool Texture::setupSize(const Size& size, bool forcePowerOfTwo)
{
Size glSize;
if(!g_graphics.canUseNonPowerOfTwoTextures() || forcePowerOfTwo)
glSize.resize(stdext::to_power_of_two(size.width()), stdext::to_power_of_two(size.height()));
else
glSize = size;
// checks texture max size
if(std::max(glSize.width(), glSize.height()) > g_graphics.getMaxTextureSize()) {
g_logger.error(stdext::format("loading texture with size %dx%d failed, "
"the maximum size allowed by the graphics card is %dx%d,"
"to prevent crashes the texture will be displayed as a blank texture",
size.width(), size.height(), g_graphics.getMaxTextureSize(), g_graphics.getMaxTextureSize()));
return false;
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}
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m_size = size;
m_glSize = glSize;
setupTranformMatrix();
return true;
}
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void Texture::setupWrap()
{
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int texParam;
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if(!m_repeat && g_graphics.canUseClampToEdge())
texParam = GL_CLAMP_TO_EDGE;
else
texParam = GL_REPEAT;
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, texParam);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, texParam);
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}
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void Texture::setupFilters()
{
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int minFilter;
int magFilter;
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if(m_smooth) {
minFilter = m_hasMipmaps ? GL_LINEAR_MIPMAP_LINEAR : GL_LINEAR;
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magFilter = GL_LINEAR;
} else {
minFilter = m_hasMipmaps ? GL_NEAREST_MIPMAP_NEAREST : GL_NEAREST;
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magFilter = GL_NEAREST;
}
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, minFilter);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, magFilter);
}
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void Texture::setupTranformMatrix()
{
if(m_upsideDown) {
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m_transformMatrix = { 1.0f/m_glSize.width(), 0.0f, 0.0f,
0.0f, -1.0f/m_glSize.height(), 0.0f,
0.0f, m_size.height()/(float)m_glSize.height(), 1.0f };
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} else {
m_transformMatrix = { 1.0f/m_glSize.width(), 0.0f, 0.0f,
0.0f, 1.0f/m_glSize.height(), 0.0f,
0.0f, 0.0f, 1.0f };
}
}
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void Texture::setupPixels(int level, const Size& size, uchar* pixels, int channels)
{
GLenum format = 0;
switch(channels) {
case 4:
format = GL_RGBA;
break;
case 3:
format = GL_RGB;
break;
case 2:
format = GL_LUMINANCE_ALPHA;
break;
case 1:
format = GL_LUMINANCE;
break;
}
glTexImage2D(GL_TEXTURE_2D, level, GL_RGBA, size.width(), size.height(), 0, format, GL_UNSIGNED_BYTE, pixels);
}