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Use shader-based hardware rendering

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This commit is contained in:
Cacodemon345
2021-12-25 21:49:25 +06:00
parent 07af487acb
commit 033abed3fe
1 changed files with 56 additions and 4 deletions
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60
src/qt/qt_hardwarerenderer.cpp
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@@ -1,5 +1,6 @@
#include "qt_hardwarerenderer.hpp"
#include <QApplication>
#include <QVector2D>
#include <atomic>
extern "C" {
@@ -12,6 +13,9 @@ void HardwareRenderer::resizeGL(int w, int h)
glViewport(0, 0, w, h);
}
#define PROGRAM_VERTEX_ATTRIBUTE 0
#define PROGRAM_TEXCOORD_ATTRIBUTE 1
void HardwareRenderer::initializeGL()
{
m_context->makeCurrent(this);
@@ -20,14 +24,62 @@ void HardwareRenderer::initializeGL()
m_blt = new QOpenGLTextureBlitter;
m_blt->setRedBlueSwizzle(true);
m_blt->create();
QOpenGLShader *vshader = new QOpenGLShader(QOpenGLShader::Vertex, this);
const char *vsrc =
"attribute highp vec4 vertex;\n"
"attribute mediump vec4 texCoord;\n"
"varying mediump vec4 texc;\n"
"uniform mediump mat4 matrix;\n"
"void main(void)\n"
"{\n"
" gl_Position = matrix * vertex;\n"
" texc = texCoord;\n"
"}\n";
vshader->compileSourceCode(vsrc);
QOpenGLShader *fshader = new QOpenGLShader(QOpenGLShader::Fragment, this);
const char *fsrc =
"uniform sampler2D texture;\n"
"varying mediump vec4 texc;\n"
"void main(void)\n"
"{\n"
" gl_FragColor = texture2D(texture, texc.st).bgra;\n"
"}\n";
fshader->compileSourceCode(fsrc);
m_prog = new QOpenGLShaderProgram;
m_prog->addShader(vshader);
m_prog->addShader(fshader);
m_prog->bindAttributeLocation("vertex", PROGRAM_VERTEX_ATTRIBUTE);
m_prog->bindAttributeLocation("texCoord", PROGRAM_TEXCOORD_ATTRIBUTE);
m_prog->link();
m_prog->bind();
m_prog->setUniformValue("texture", 0);
}
void HardwareRenderer::paintGL() {
m_context->makeCurrent(this);
m_blt->bind();
QMatrix4x4 target = QOpenGLTextureBlitter::targetTransform(QRect(0, 0, 2048, 2048), source);
m_blt->blit(m_texture->textureId(), target, QOpenGLTextureBlitter::Origin::OriginTopLeft);
m_blt->release();
QVector<QVector2D> verts, texcoords;
QMatrix4x4 mat;
mat.setToIdentity();
mat.ortho(QRect(0, 0, width(), height()));
verts.push_back(QVector2D((float)destination.x(), (float)destination.y()));
verts.push_back(QVector2D((float)destination.x(), (float)destination.y() + destination.height()));
verts.push_back(QVector2D((float)destination.x() + destination.width(), (float)destination.y() + destination.height()));
verts.push_back(QVector2D((float)destination.x() + destination.width(), (float)destination.y()));
texcoords.push_back(QVector2D((float)source.x() / 2048.f, (float)(source.y()) / 2048.f));
texcoords.push_back(QVector2D((float)source.x() / 2048.f, (float)(source.y() + source.height()) / 2048.f));
texcoords.push_back(QVector2D((float)(source.x() + source.width()) / 2048.f, (float)(source.y() + source.height()) / 2048.f));
texcoords.push_back(QVector2D((float)(source.x() + source.width()) / 2048.f, (float)(source.y()) / 2048.f));
m_prog->setUniformValue("matrix", mat);
m_prog->enableAttributeArray(PROGRAM_VERTEX_ATTRIBUTE);
m_prog->enableAttributeArray(PROGRAM_TEXCOORD_ATTRIBUTE);
m_prog->setAttributeArray(PROGRAM_VERTEX_ATTRIBUTE, verts.data());
m_prog->setAttributeArray(PROGRAM_TEXCOORD_ATTRIBUTE, texcoords.data());
m_texture->bind();
glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
}
void HardwareRenderer::setRenderType(RenderType type) {