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Implemented camera downsampling (without reducing the render target resolution, for temporary drops of resolution without any skipped frames)

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--HG--
branch : nfb
This commit is contained in:
Kearwood Gilbert
2014-04-29 00:30:14 -07:00
parent e9c17df900
commit 16953ba932
6 changed files with 46 additions and 23 deletions
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41
KREngine/kraken/KRCamera.cpp
View File

@@ -39,8 +39,8 @@ KRCamera::KRCamera(KRScene &scene, std::string name) : KRNode(scene, name) {
m_last_frame_start = 0;
m_particlesAbsoluteTime = 0.0f;
backingWidth = 0;
backingHeight = 0;
m_backingWidth = 0;
m_backingHeight = 0;
volumetricBufferWidth = 0;
volumetricBufferHeight = 0;
m_pSkyBoxTexture = NULL;
@@ -54,6 +54,7 @@ KRCamera::KRCamera(KRScene &scene, std::string name) : KRNode(scene, name) {
volumetricLightAccumulationBuffer = 0;
volumetricLightAccumulationTexture = 0;
m_frame_times_filled = 0;
m_downsample = KRVector2::One();
}
KRCamera::~KRCamera() {
@@ -83,7 +84,7 @@ void KRCamera::flushSkybox()
}
void KRCamera::renderFrame(float deltaTime, GLint renderBufferWidth, GLint renderBufferHeight)
{
{
// ----====---- Record timing information for measuring FPS ----====----
uint64_t current_time = m_pContext->getAbsoluteTimeMilliseconds();
if(m_last_frame_start != 0) {
@@ -104,7 +105,7 @@ void KRCamera::renderFrame(float deltaTime, GLint renderBufferWidth, GLint rende
//KRMat4 viewMatrix = KRMat4::Invert(getModelMatrix());
settings.setViewportSize(KRVector2(backingWidth, backingHeight));
settings.setViewportSize(KRVector2(m_backingWidth, m_backingHeight));
KRMat4 projectionMatrix;
projectionMatrix.perspective(settings.perspective_fov, settings.m_viewportSize.x / settings.m_viewportSize.y, settings.perspective_nearz, settings.perspective_farz);
m_viewport = KRViewport(settings.getViewportSize(), viewMatrix, projectionMatrix);
@@ -175,6 +176,7 @@ void KRCamera::renderFrame(float deltaTime, GLint renderBufferWidth, GLint rende
// Set render target
GLDEBUG(glBindFramebuffer(GL_FRAMEBUFFER, lightAccumulationBuffer));
GLDEBUG(glFramebufferTexture2D(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_TEXTURE_2D, compositeDepthTexture, 0));
GLDEBUG(glViewport(0, 0, m_viewport.getSize().x * m_downsample.x, m_viewport.getSize().y * m_downsample.y));
GLDEBUG(glClearColor(0.0f, 0.0f, 0.0f, 0.0f));
GLDEBUG(glClear(GL_COLOR_BUFFER_BIT));
@@ -251,7 +253,7 @@ void KRCamera::renderFrame(float deltaTime, GLint renderBufferWidth, GLint rende
// Set render target
GLDEBUG(glBindFramebuffer(GL_FRAMEBUFFER, compositeFramebuffer));
GLDEBUG(glFramebufferTexture2D(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_TEXTURE_2D, compositeDepthTexture, 0));
GLDEBUG(glViewport(0, 0, m_viewport.getSize().x, m_viewport.getSize().y));
GLDEBUG(glViewport(0, 0, m_viewport.getSize().x * m_downsample.x, m_viewport.getSize().y * m_downsample.y));
// Disable alpha blending
GLDEBUG(glDisable(GL_BLEND));
@@ -517,9 +519,9 @@ void KRCamera::renderFrame(float deltaTime, GLint renderBufferWidth, GLint rende
void KRCamera::createBuffers(GLint renderBufferWidth, GLint renderBufferHeight) {
if(renderBufferWidth != backingWidth || renderBufferHeight != backingHeight) {
backingWidth = renderBufferWidth;
backingHeight = renderBufferHeight;
if(renderBufferWidth != m_backingWidth || renderBufferHeight != m_backingHeight) {
m_backingWidth = renderBufferWidth;
m_backingHeight = renderBufferHeight;
if (compositeDepthTexture) {
GLDEBUG(glDeleteTextures(1, &compositeDepthTexture));
@@ -558,7 +560,7 @@ void KRCamera::createBuffers(GLint renderBufferWidth, GLint renderBufferHeight)
GLDEBUG(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR));
GLDEBUG(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE)); // This is necessary for non-power-of-two textures
GLDEBUG(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE)); // This is necessary for non-power-of-two textures
GLDEBUG(glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, backingWidth, backingHeight, 0, GL_BGRA, GL_UNSIGNED_BYTE, NULL));
GLDEBUG(glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, m_backingWidth, m_backingHeight, 0, GL_BGRA, GL_UNSIGNED_BYTE, NULL));
GLDEBUG(glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, compositeColorTexture, 0));
// ----- Create Depth Texture for compositeFramebuffer -----
@@ -568,9 +570,9 @@ void KRCamera::createBuffers(GLint renderBufferWidth, GLint renderBufferHeight)
GLDEBUG(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST));
GLDEBUG(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE)); // This is necessary for non-power-of-two textures
GLDEBUG(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE)); // This is necessary for non-power-of-two textures
GLDEBUG(glTexImage2D(GL_TEXTURE_2D, 0, GL_DEPTH_COMPONENT, backingWidth, backingHeight, 0, GL_DEPTH_COMPONENT, GL_UNSIGNED_INT, NULL));
//GLDEBUG(glTexImage2D(GL_TEXTURE_2D, 0, GL_DEPTH_COMPONENT16, backingWidth, backingHeight, 0, GL_DEPTH_COMPONENT, GL_UNSIGNED_INT, NULL));
//GLDEBUG(glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT24_OES, backingWidth, backingHeight));
GLDEBUG(glTexImage2D(GL_TEXTURE_2D, 0, GL_DEPTH_COMPONENT, m_backingWidth, m_backingHeight, 0, GL_DEPTH_COMPONENT, GL_UNSIGNED_INT, NULL));
//GLDEBUG(glTexImage2D(GL_TEXTURE_2D, 0, GL_DEPTH_COMPONENT16, m_backingWidth, m_backingHeight, 0, GL_DEPTH_COMPONENT, GL_UNSIGNED_INT, NULL));
//GLDEBUG(glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT24_OES, m_backingWidth, m_backingHeight));
GLDEBUG(glFramebufferTexture2D(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_TEXTURE_2D, compositeDepthTexture, 0));
// ===== Create offscreen compositing framebuffer object =====
@@ -584,7 +586,7 @@ void KRCamera::createBuffers(GLint renderBufferWidth, GLint renderBufferHeight)
GLDEBUG(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR));
GLDEBUG(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE)); // This is necessary for non-power-of-two textures
GLDEBUG(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE)); // This is necessary for non-power-of-two textures
GLDEBUG(glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, backingWidth, backingHeight, 0, GL_BGRA, GL_UNSIGNED_BYTE, NULL));
GLDEBUG(glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, m_backingWidth, m_backingHeight, 0, GL_BGRA, GL_UNSIGNED_BYTE, NULL));
GLDEBUG(glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, lightAccumulationTexture, 0));
}
@@ -692,7 +694,7 @@ void KRCamera::renderPost()
}};
GLDEBUG(glViewport(0, 0, m_viewport.getSize().x, m_viewport.getSize().y));
GLDEBUG(glDisable(GL_DEPTH_TEST));
KRShader *postShader = m_pContext->getShaderManager()->getShader("PostShader", this, std::vector<KRPointLight *>(), std::vector<KRDirectionalLight *>(), std::vector<KRSpotLight *>(), 0, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, KRNode::RENDER_PASS_FORWARD_TRANSPARENT);
@@ -1117,3 +1119,14 @@ const KRViewport &KRCamera::getViewport() const
{
return m_viewport;
}
KRVector2 KRCamera::getDownsample()
{
return m_downsample;
}
void KRCamera::setDownsample(float v)
{
m_downsample = v;
}

6
KREngine/kraken/KRCamera.h
View File

@@ -69,11 +69,13 @@ public:
std::string getDebugText();
void flushSkybox(); // this will delete the skybox and cause the camera to reload a new skybox based on the settings
KRVector2 getDownsample();
void setDownsample(float v);
private:
void createBuffers(GLint renderBufferWidth, GLint renderBufferHeight);
GLint backingWidth, backingHeight;
GLint m_backingWidth, m_backingHeight;
GLint volumetricBufferWidth, volumetricBufferHeight;
GLuint compositeFramebuffer, compositeDepthTexture, compositeColorTexture;
@@ -91,7 +93,7 @@ private:
float m_particlesAbsoluteTime;
KRVector2 m_downsample;
typedef struct {
GLfloat x;

13
KREngine/kraken/KRShader.cpp
View File

@@ -64,6 +64,7 @@ const char *KRShader::KRENGINE_UNIFORM_NAMES[] = {
"projection_matrix", // KRENGINE_UNIFORM_PROJECTION_MATRIX
"camera_position_model_space", // KRENGINE_UNIFORM_CAMERAPOS_MODEL_SPACE
"viewport", // KRENGINE_UNIFORM_VIEWPORT
"viewport_downsample", // KRENGINE_UNIFORM_VIEWPORT_DOWNSAMPLE
"diffuseTexture", // KRENGINE_UNIFORM_DIFFUSETEXTURE
"specularTexture", // KRENGINE_UNIFORM_SPECULARTEXTURE
"reflectionCubeTexture", // KRENGINE_UNIFORM_REFLECTIONCUBETEXTURE
@@ -502,14 +503,18 @@ bool KRShader::bind(KRCamera &camera, const KRViewport &viewport, const KRMat4 &
if(m_uniforms[KRENGINE_UNIFORM_VIEWPORT] != -1) {
setUniform(KRENGINE_UNIFORM_VIEWPORT, KRVector4(
(GLfloat)0.0,
(GLfloat)0.0,
(GLfloat)viewport.getSize().x,
(GLfloat)viewport.getSize().y
(GLfloat)0.0,
(GLfloat)0.0,
(GLfloat)viewport.getSize().x,
(GLfloat)viewport.getSize().y
)
);
}
if(m_uniforms[KRENGINE_UNIFORM_VIEWPORT_DOWNSAMPLE] != -1) {
setUniform(KRENGINE_UNIFORM_VIEWPORT_DOWNSAMPLE, camera.getDownsample());
}
// Rim highlighting parameters
setUniform(KRENGINE_UNIFORM_RIM_COLOR, rim_color);
setUniform(KRENGINE_UNIFORM_RIM_POWER, rim_power);

1
KREngine/kraken/KRShader.h
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@@ -76,6 +76,7 @@ public:
KRENGINE_UNIFORM_PROJECTION_MATRIX,
KRENGINE_UNIFORM_CAMERAPOS_MODEL_SPACE,
KRENGINE_UNIFORM_VIEWPORT,
KRENGINE_UNIFORM_VIEWPORT_DOWNSAMPLE,
KRENGINE_UNIFORM_DIFFUSETEXTURE,
KRENGINE_UNIFORM_SPECULARTEXTURE,
KRENGINE_UNIFORM_REFLECTIONCUBETEXTURE,

3
KREngine/kraken_standard_assets_ios/Shaders/PostShader.vsh
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@@ -25,6 +25,7 @@
// or implied, of Kearwood Gilbert.
//
uniform mediump vec2 viewport_downsample;
attribute vec4 vertex_position;
attribute lowp vec4 vertex_uv;
@@ -33,5 +34,5 @@ varying mediump vec2 textureCoordinate;
void main()
{
gl_Position = vertex_position;
textureCoordinate = vertex_uv.xy;
textureCoordinate = vertex_uv.xy * viewport_downsample.xy;
}

5
KREngine/kraken_standard_assets_osx/Shaders/PostShader_osx.vsh
View File

@@ -25,6 +25,7 @@
// or implied, of Kearwood Gilbert.
//
uniform mediump vec2 viewport_downsample;
attribute vec4 vertex_position;
attribute lowp vec4 vertex_uv;
@@ -33,5 +34,5 @@ varying mediump vec2 textureCoordinate;
void main()
{
gl_Position = vertex_position;
textureCoordinate = vertex_uv.xy;
}
textureCoordinate = vertex_uv.xy * viewport_downsample.xy;
}