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preserve preview aspect ratio, fix device pixel ratio scaling

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This commit is contained in:
SamGondelman 2016-06-29 11:02:43 -07:00
parent a741ae5069
commit af2a0ed924
2 changed files with 26 additions and 23 deletions
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48
libraries/display-plugins/src/display-plugins/hmd/HmdDisplayPlugin.cpp
View file

@ -97,6 +97,7 @@ void HmdDisplayPlugin::downloadFinished() {
Texture::MinFilter(TextureTarget::_2D, TextureMinFilter::Linear);
Texture::MagFilter(TextureTarget::_2D, TextureMagFilter::Linear);
glBindTexture(GL_TEXTURE_2D, 0);
_previewAspect = ((float)previewTexture.width())/((float)previewTexture.height());
_firstPreview = true;
}
}
@ -396,30 +397,31 @@ void HmdDisplayPlugin::internalPresent() {
// screen preview mirroring
auto window = _container->getPrimaryWidget();
auto windowSize = toGlm(window->size());
auto devicePixelRatio = window->devicePixelRatio();
auto windowSize = toGlm(window->size());
windowSize *= devicePixelRatio;
float windowAspect = aspect(windowSize);
float sceneAspect = _enablePreview ? aspect(_renderTargetSize) : _previewAspect;
if (_enablePreview && _monoPreview) {
sceneAspect /= 2.0f;
}
float aspectRatio = sceneAspect / windowAspect;
uvec2 targetViewportSize = windowSize;
if (aspectRatio < 1.0f) {
targetViewportSize.x *= aspectRatio;
} else {
targetViewportSize.y /= aspectRatio;
}
uvec2 targetViewportPosition;
if (targetViewportSize.x < windowSize.x) {
targetViewportPosition.x = (windowSize.x - targetViewportSize.x) / 2;
} else if (targetViewportSize.y < windowSize.y) {
targetViewportPosition.y = (windowSize.y - targetViewportSize.y) / 2;
}
if (_enablePreview) {
float windowAspect = aspect(windowSize);
float sceneAspect = aspect(_renderTargetSize);
if (_monoPreview) {
sceneAspect /= 2.0f;
}
float aspectRatio = sceneAspect / windowAspect;
uvec2 targetViewportSize = windowSize;
if (aspectRatio < 1.0f) {
targetViewportSize.x *= aspectRatio;
} else {
targetViewportSize.y /= aspectRatio;
}
uvec2 targetViewportPosition;
if (targetViewportSize.x < windowSize.x) {
targetViewportPosition.x = (windowSize.x - targetViewportSize.x) / 2;
} else if (targetViewportSize.y < windowSize.y) {
targetViewportPosition.y = (windowSize.y - targetViewportSize.y) / 2;
}
using namespace oglplus;
Context::Clear().ColorBuffer();
auto sourceSize = _compositeFramebuffer->size;
@ -438,7 +440,7 @@ void HmdDisplayPlugin::internalPresent() {
useProgram(_previewProgram);
glClearColor(0, 0, 0, 1);
glClear(GL_COLOR_BUFFER_BIT);
glViewport(0, 0, windowSize.x * devicePixelRatio, windowSize.y * devicePixelRatio);
glViewport(targetViewportPosition.x, targetViewportPosition.y, targetViewportSize.x, targetViewportSize.y);
glUniform1i(PREVIEW_TEXTURE_LOCATION, 0);
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, _previewTextureID);

1
libraries/display-plugins/src/display-plugins/hmd/HmdDisplayPlugin.h
View file

@ -101,6 +101,7 @@ private:
GLuint _previewTextureID { 0 };
glm::uvec2 _prevWindowSize { 0, 0 };
qreal _prevDevicePixelRatio { 0 };
float _previewAspect { 0 };
ShapeWrapperPtr _sphereSection;
ProgramPtr _reprojectionProgram;
ProgramPtr _laserProgram;