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GLShaderTextured: use mutable or immutable storage depending on system capability. Implements #582

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This commit is contained in:
f4exb 2020-08-03 00:30:13 +02:00
parent 161cded056
commit 9c11e022f3
2 changed files with 140 additions and 15 deletions
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145
sdrgui/gui/glshadertextured.cpp
View File

@ -27,10 +27,12 @@
#include "gui/glshadertextured.h"
GLShaderTextured::GLShaderTextured() :
m_program(0),
m_texture(0),
m_program(nullptr),
m_texture(nullptr),
m_textureId(0),
m_matrixLoc(0),
m_textureLoc(0)
m_textureLoc(0),
m_useImmutableStorage(true)
{ }
GLShaderTextured::~GLShaderTextured()
@ -40,6 +42,10 @@ GLShaderTextured::~GLShaderTextured()
void GLShaderTextured::initializeGL()
{
initializeOpenGLFunctions();
m_useImmutableStorage = useImmutableStorage();
qDebug() << "GLShaderTextured::initializeGL: m_useImmutableStorage: " << m_useImmutableStorage;
m_program = new QOpenGLShaderProgram;
if (!m_program->addShaderFromSourceCode(QOpenGLShader::Vertex, m_vertexShaderSourceTextured)) {
@ -64,6 +70,15 @@ void GLShaderTextured::initializeGL()
}
void GLShaderTextured::initTexture(const QImage& image, QOpenGLTexture::WrapMode wrapMode)
{
if (m_useImmutableStorage) {
initTextureImmutable(image, wrapMode);
} else {
initTextureMutable(image, wrapMode);
}
}
void GLShaderTextured::initTextureImmutable(const QImage& image, QOpenGLTexture::WrapMode wrapMode)
{
if (m_texture) {
delete m_texture;
@ -76,10 +91,39 @@ void GLShaderTextured::initTexture(const QImage& image, QOpenGLTexture::WrapMode
m_texture->setWrapMode(wrapMode);
}
void GLShaderTextured::initTextureMutable(const QImage& image, QOpenGLTexture::WrapMode wrapMode)
{
if (m_textureId)
{
glDeleteTextures(1, &m_textureId);
m_textureId = 0;
}
glGenTextures(1, &m_textureId);
glBindTexture(GL_TEXTURE_2D, m_textureId);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8,
image.width(), image.height(), 0, GL_RGBA, GL_UNSIGNED_BYTE, image.constScanLine(0));
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, wrapMode);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, wrapMode);
}
void GLShaderTextured::subTexture(int xOffset, int yOffset, int width, int height, const void *pixels)
{
if (!m_texture) {
qDebug("GLShaderTextured::subTexture: no texture defined. Doing nothing");
if (m_useImmutableStorage) {
subTextureImmutable(xOffset, yOffset, width, height, pixels);
} else {
subTextureMutable(xOffset, yOffset, width, height, pixels);
}
}
void GLShaderTextured::subTextureImmutable(int xOffset, int yOffset, int width, int height, const void *pixels)
{
if (!m_texture)
{
qDebug("GLShaderTextured::subTextureImmutable: no texture defined. Doing nothing");
return;
}
@ -88,14 +132,31 @@ void GLShaderTextured::subTexture(int xOffset, int yOffset, int width, int heigh
f->glTexSubImage2D(GL_TEXTURE_2D, 0, xOffset, yOffset, width, height, GL_RGBA, GL_UNSIGNED_BYTE, pixels);
}
void GLShaderTextured::subTextureMutable(int xOffset, int yOffset, int width, int height, const void *pixels)
{
if (!m_textureId)
{
qDebug("GLShaderTextured::subTextureMutable: no texture defined. Doing nothing");
return;
}
glBindTexture(GL_TEXTURE_2D, m_textureId);
glTexSubImage2D(GL_TEXTURE_2D, 0, xOffset, yOffset, width, height, GL_RGBA, GL_UNSIGNED_BYTE, pixels);
}
void GLShaderTextured::drawSurface(const QMatrix4x4& transformMatrix, GLfloat *textureCoords, GLfloat *vertices, int nbVertices)
{
draw(GL_TRIANGLE_FAN, transformMatrix, textureCoords, vertices, nbVertices);
if (m_useImmutableStorage) {
draw(GL_TRIANGLE_FAN, transformMatrix, textureCoords, vertices, nbVertices);
} else {
drawMutable(GL_TRIANGLE_FAN, transformMatrix, textureCoords, vertices, nbVertices);
}
}
void GLShaderTextured::draw(unsigned int mode, const QMatrix4x4& transformMatrix, GLfloat *textureCoords, GLfloat *vertices, int nbVertices)
{
if (!m_texture) {
if (!m_texture)
{
qDebug("GLShaderTextured::draw: no texture defined. Doing nothing");
return;
}
@ -114,17 +175,73 @@ void GLShaderTextured::draw(unsigned int mode, const QMatrix4x4& transformMatrix
m_program->release();
}
void GLShaderTextured::cleanup()
void GLShaderTextured::drawMutable(unsigned int mode, const QMatrix4x4& transformMatrix, GLfloat *textureCoords, GLfloat *vertices, int nbVertices)
{
if (m_program) {
delete m_program;
m_program = 0;
if (!m_textureId)
{
qDebug("GLShaderTextured::drawMutable: no texture defined. Doing nothing");
return;
}
if (m_texture) {
delete m_texture;
m_texture = 0;
m_program->bind();
m_program->setUniformValue(m_matrixLoc, transformMatrix);
glBindTexture(GL_TEXTURE_2D, m_textureId);
m_program->setUniformValue(m_textureLoc, 0); // Use texture unit 0 which magically contains our texture
glEnableVertexAttribArray(0); // vertex
glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 0, vertices);
glEnableVertexAttribArray(1); // texture coordinates
glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 0, textureCoords);
glDrawArrays(mode, 0, nbVertices);
glDisableVertexAttribArray(0);
m_program->release();
}
void GLShaderTextured::cleanup()
{
if (m_program)
{
delete m_program;
m_program = nullptr;
}
if (m_texture)
{
delete m_texture;
m_texture = nullptr;
}
if (m_textureId)
{
glDeleteTextures(1, &m_textureId);
m_textureId = 0;
}
}
bool GLShaderTextured::useImmutableStorage()
{
QOpenGLContext* ctx = QOpenGLContext::currentContext();
QSurfaceFormat sf = ctx->format();
if (sf.version() >= qMakePair(4, 2)
|| ctx->hasExtension(QByteArrayLiteral("GL_ARB_texture_storage"))
|| ctx->hasExtension(QByteArrayLiteral("GL_EXT_texture_storage")))
{
void (QOPENGLF_APIENTRYP glTexStorage2D)(
GLenum target, GLsizei levels, GLenum internalFormat, GLsizei width, GLsizei height);
glTexStorage2D = reinterpret_cast<void (QOPENGLF_APIENTRYP)(
GLenum, GLsizei, GLenum, GLsizei, GLsizei)>(ctx->getProcAddress("glTexStorage2D"));
int data = 0;
GLuint textureId;
glGenTextures(1, &textureId);
glBindTexture(GL_TEXTURE_2D, textureId);
glTexStorage2D(GL_TEXTURE_2D, 1, GL_RGBA8, 1, 1);
glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, 0, 0, GL_RGBA, GL_UNSIGNED_BYTE, &data);
GLenum err = glGetError();
glDeleteTextures(1, &textureId);
return err == GL_NO_ERROR;
}
return false;
}
const QString GLShaderTextured::m_vertexShaderSourceTextured = QString(

10
sdrgui/gui/glshadertextured.h
View File

@ -32,7 +32,7 @@ class QOpenGLShaderProgram;
class QMatrix4x4;
class QImage;
class SDRGUI_API GLShaderTextured
class SDRGUI_API GLShaderTextured : protected QOpenGLFunctions
{
public:
GLShaderTextured();
@ -46,11 +46,19 @@ public:
private:
void draw(unsigned int mode, const QMatrix4x4& transformMatrix, GLfloat *textureCoords, GLfloat *vertices, int nbVertices);
void drawMutable(unsigned int mode, const QMatrix4x4& transformMatrix, GLfloat *textureCoords, GLfloat *vertices, int nbVertices);
void initTextureImmutable(const QImage& image, QOpenGLTexture::WrapMode wrapMode = QOpenGLTexture::Repeat);
void subTextureImmutable(int xOffset, int yOffset, int width, int height, const void *pixels);
void initTextureMutable(const QImage& image, QOpenGLTexture::WrapMode wrapMode = QOpenGLTexture::Repeat);
void subTextureMutable(int xOffset, int yOffset, int width, int height, const void *pixels);
bool useImmutableStorage();
QOpenGLShaderProgram *m_program;
QOpenGLTexture *m_texture;
unsigned int m_textureId;
int m_matrixLoc;
int m_textureLoc;
bool m_useImmutableStorage;
static const QString m_vertexShaderSourceTextured;
static const QString m_fragmentShaderSourceTextured;
};