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BLT-With-Graphics-Template
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frame buffer

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Brett 2024-04-18 19:32:26 -04:00
parent 725b6963af
commit 42fbae4ba1
3 changed files with 141 additions and 15 deletions
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2
CMakeLists.txt
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@ -1,6 +1,6 @@
cmake_minimum_required(VERSION 3.25)
set(BLT_GRAPHICS_VERSION 0.9.17)
set(BLT_GRAPHICS_VERSION 0.10.1)
set(BLT_GRAPHICS_TEST_VERSION 0.0.1)
project(BLT_WITH_GRAPHICS VERSION ${BLT_GRAPHICS_VERSION})

36
include/blt/gfx/framebuffer.h
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@ -42,6 +42,7 @@ namespace blt::gfx
GLuint rboID;
GLuint storage_type;
blt::i32 width_, height_;
blt::i32 samples = 0;
public:
rbo_t(): rboID(0), storage_type(0), width_(-1), height_(-1)
{}
@ -52,14 +53,21 @@ namespace blt::gfx
void setStorage(GLuint storage_type, blt::i32 width, blt::i32 height);
void setStorageMultiSampled(GLuint storage_type, blt::i32 width, blt::i32 height, blt::i32 samples);
void updateStorage(blt::i32 width, blt::i32 height);
void updateStorageMultiSampled(blt::i32 width, blt::i32 height, blt::i32 samples);
void resize(blt::i32 width, blt::i32 height);
static void unbind();
void destroy();
static rbo_t make_render_buffer(GLuint storage_type, blt::i32 width, blt::i32 height);
static rbo_t make_render_buffer(GLuint storage_type, blt::i32 width, blt::i32 height, blt::i32 samples);
};
class fbo_t
@ -99,18 +107,42 @@ namespace blt::gfx
// this function takes ownership of the render buffer
void attachRenderBuffer(rbo_t rbo, attachment_t attachment);
void blitTexture(const fbo_t& draw, blt::i32 srcX_off = 0, blt::i32 srcY_off = 0, blt::i32 destX_off = 0, blt::i32 destY_off = 0, GLuint filter = GL_NEAREST) const;
void blitTexture(const fbo_t& draw, blt::i32 srcX_off = 0, blt::i32 srcY_off = 0, blt::i32 destX_off = 0, blt::i32 destY_off = 0,
GLuint filter = GL_NEAREST, attachment_t attachment_read = attachment_t::COLOR0,
attachment_t attachment_write = attachment_t::COLOR0) const;
void blitToScreen(blt::i32 width, blt::i32 height) const;
void blitDepth(const fbo_t& draw, blt::i32 srcX_off = 0, blt::i32 srcY_off = 0, blt::i32 destX_off = 0, blt::i32 destY_off = 0, GLuint filter = GL_NEAREST) const;
void blitDepth(const fbo_t& draw, blt::i32 srcX_off = 0, blt::i32 srcY_off = 0, blt::i32 destX_off = 0, blt::i32 destY_off = 0,
GLuint filter = GL_NEAREST) const;
void blitStencil(const fbo_t& draw, blt::i32 srcX_off = 0, blt::i32 srcY_off = 0, blt::i32 destX_off = 0, blt::i32 destY_off = 0,
GLuint filter = GL_NEAREST) const;
static bool validate();
static void unbind();
void destroy();
[[nodiscard]] i32 getHeight() const
{
return height_;
}
[[nodiscard]] i32 getWidth() const
{
return width_;
}
public:
static fbo_t make_render_texture(blt::i32 width, blt::i32 height);
static fbo_t make_multisample_render_texture(blt::i32 width, blt::i32 height, blt::i32 samples);
static fbo_t make_render_target(blt::i32 width, blt::i32 height);
static fbo_t make_multisample_render_target(blt::i32 width, blt::i32 height, blt::i32 samples);
};
#undef C

118
src/blt/gfx/framebuffer.cpp
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@ -43,13 +43,15 @@ namespace blt::gfx
{
width_ = width;
height_ = height;
samples = 0;
glRenderbufferStorage(GL_RENDERBUFFER, storage_type, width, height);
}
void rbo_t::updateStorageMultiSampled(blt::i32 width, blt::i32 height, blt::i32 samples)
void rbo_t::updateStorageMultiSampled(blt::i32 width, blt::i32 height, blt::i32 s)
{
width_ = width;
height_ = height;
samples = s;
glRenderbufferStorageMultisample(GL_RENDERBUFFER, samples, storage_type, width, height);
}
@ -59,6 +61,20 @@ namespace blt::gfx
updateStorage(width, height);
}
void rbo_t::setStorageMultiSampled(GLuint s_type, blt::i32 width, blt::i32 height, blt::i32 s)
{
storage_type = s_type;
updateStorageMultiSampled(width, height, s);
}
void rbo_t::resize(blt::i32 width, blt::i32 height)
{
if (samples > 0)
updateStorageMultiSampled(width, height, samples);
else
updateStorage(width, height);
}
rbo_t rbo_t::make_render_buffer(GLuint storage_type, blt::i32 width, blt::i32 height)
{
rbo_t rbo{};
@ -69,6 +85,16 @@ namespace blt::gfx
return rbo;
}
rbo_t rbo_t::make_render_buffer(GLuint storage_type, blt::i32 width, blt::i32 height, blt::i32 samples)
{
rbo_t rbo{};
rbo.create();
rbo.bind();
rbo.setStorageMultiSampled(storage_type, width, height, samples);
rbo_t::unbind();
return rbo;
}
void fbo_t::create(fbo_t::draw_t type)
{
generic_bind_type = static_cast<GLuint>(type);
@ -131,17 +157,20 @@ namespace blt::gfx
for (auto& rbo : render_buffers)
{
rbo.bind();
rbo.updateStorage(width, height);
rbo.resize(width, height);
}
for (auto& texture : texture_buffers)
texture->updateSize(width, height);
}
void fbo_t::blitTexture(const fbo_t& draw, blt::i32 srcX, blt::i32 srcY, blt::i32 destX, blt::i32 destY, GLuint filter) const
void fbo_t::blitTexture(const fbo_t& draw, blt::i32 srcX, blt::i32 srcY, blt::i32 destX, blt::i32 destY, GLuint filter,
attachment_t attachment_read, attachment_t attachment_write) const
{
glBindFramebuffer(GL_READ_FRAMEBUFFER, fboID);
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, draw.fboID);
glReadBuffer(static_cast<GLuint>(attachment_read));
glDrawBuffer(static_cast<GLuint>(attachment_write));
glBlitFramebuffer(srcX, srcY, width_, height_, destX, destY, draw.width_, draw.height_, GL_COLOR_BUFFER_BIT, filter);
}
@ -152,6 +181,22 @@ namespace blt::gfx
glBlitFramebuffer(srcX, srcY, width_, height_, destX, destY, draw.width_, draw.height_, GL_DEPTH_BUFFER_BIT, filter);
}
void fbo_t::blitStencil(const fbo_t& draw, blt::i32 srcX, blt::i32 srcY, blt::i32 destX, blt::i32 destY, GLuint filter) const
{
glBindFramebuffer(GL_READ_FRAMEBUFFER, fboID);
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, draw.fboID);
glBlitFramebuffer(srcX, srcY, width_, height_, destX, destY, draw.width_, draw.height_, GL_STENCIL_BUFFER_BIT, filter);
}
void fbo_t::blitToScreen(blt::i32 width, blt::i32 height) const
{
glBindFramebuffer(GL_READ_FRAMEBUFFER, fboID);
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, 0);
//glReadBuffer(GL_COLOR_ATTACHMENT0);
//glDrawBuffer(GL_COLOR_ATTACHMENT0);
glBlitFramebuffer(0, 0, width_, height_, 0, 0, width, height, GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT, GL_NEAREST);
}
fbo_t fbo_t::make_render_texture(blt::i32 width, blt::i32 height)
{
fbo_t fbo;
@ -162,11 +207,7 @@ namespace blt::gfx
auto* texture = new texture_gl2D(width, height);
fbo.attachTexture(texture, attachment_t::COLOR0);
rbo_t depth_rbo;
depth_rbo.create();
depth_rbo.bind();
depth_rbo.setStorage(GL_DEPTH24_STENCIL8, width, height);
rbo_t depth_rbo = rbo_t::make_render_buffer(GL_DEPTH24_STENCIL8, width, height);
fbo.attachRenderBuffer(depth_rbo, attachment_t::DEPTH_STENCIL);
if (!fbo_t::validate())
@ -176,10 +217,63 @@ namespace blt::gfx
return fbo;
}
void fbo_t::blitToScreen(blt::i32 width, blt::i32 height) const
fbo_t fbo_t::make_multisample_render_texture(blt::i32 width, blt::i32 height, blt::i32 samples)
{
glBindFramebuffer(GL_READ_FRAMEBUFFER, fboID);
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, 0);
glBlitFramebuffer(0, 0, width_, height_, 0, 0, width, height, GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT, GL_NEAREST);
fbo_t fbo;
fbo.create();
fbo.bind();
auto* texture = new texture_gl2D_multisample(width, height, samples);
fbo.attachTexture(texture, attachment_t::COLOR0);
rbo_t depth_rbo = rbo_t::make_render_buffer(GL_DEPTH24_STENCIL8, width, height, samples);
fbo.attachRenderBuffer(depth_rbo, attachment_t::DEPTH_STENCIL);
if (!fbo_t::validate())
BLT_ERROR("Failed to create render texture framebuffer!");
fbo_t::unbind();
return fbo;
}
fbo_t fbo_t::make_multisample_render_target(blt::i32 width, blt::i32 height, blt::i32 samples)
{
fbo_t fbo;
fbo.create();
fbo.bind();
rbo_t color_rbo = rbo_t::make_render_buffer(GL_RGBA8, width, height, samples);
rbo_t depth_rbo = rbo_t::make_render_buffer(GL_DEPTH24_STENCIL8, width, height, samples);
fbo.attachRenderBuffer(color_rbo, attachment_t::COLOR0);
fbo.attachRenderBuffer(depth_rbo, attachment_t::DEPTH_STENCIL);
if (!fbo_t::validate())
BLT_ERROR("Failed to create multi-sampled render texture framebuffer!");
fbo_t::unbind();
return fbo;
}
fbo_t fbo_t::make_render_target(blt::i32 width, blt::i32 height)
{
fbo_t fbo;
fbo.create();
fbo.bind();
rbo_t color_rbo = rbo_t::make_render_buffer(GL_RGBA8, width, height);
rbo_t depth_rbo = rbo_t::make_render_buffer(GL_DEPTH24_STENCIL8, width, height);
fbo.attachRenderBuffer(color_rbo, attachment_t::COLOR0);
fbo.attachRenderBuffer(depth_rbo, attachment_t::DEPTH_STENCIL);
if (!fbo_t::validate())
BLT_ERROR("Failed to create multi-sampled render texture framebuffer!");
fbo_t::unbind();
return fbo;
}
}