LOVE/love
1
0
Fork 0
mirror of https://github.com/love2d/love.git synced 2026-08-15 15:51:12 +02:00
Code Issues Packages Projects Releases Wiki Activity

When multiple canvases are active at once (MRT), individual canvases can now be selectively cleared with love.graphics.clear(c1, c2, ...) by passing empty tables for the canvases that shouldn't be cleared, and color tables for the canvases that should.

Browse Source
This commit is contained in:
Alex Szpakowski
2015-12-29 00:10:40 -04:00
parent b56a0cfc3d
commit 09e6a9a434
3 changed files with 44 additions and 20 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/modules/graphics/opengl/Graphics.cpp
+19 -5
View File
@@ -448,21 +448,29 @@ void Graphics::clear(Colorf c)
glClear(GL_COLOR_BUFFER_BIT | GL_STENCIL_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
}
void Graphics::clear(const std::vector<Colorf> &colors)
void Graphics::clear(const std::vector<OptionalColorf> &colors)
{
if (colors.size() == 0)
return;
if (states.back().canvases.size() == 0)
return clear(colors[0]);
{
if (colors[0].enabled)
clear({colors[0].r, colors[0].g, colors[0].b, colors[0].a});
return;
}
if (colors.size() != states.back().canvases.size())
throw love::Exception("Number of clear colors must match the number of active canvases (%ld)", states.back().canvases.size());
std::vector<GLenum> bufs;
bool drawbuffermodified = false;
for (int i = 0; i < (int) colors.size(); i++)
{
if (!colors[i].enabled)
continue;
GLfloat c[] = {colors[i].r/255.f, colors[i].g/255.f, colors[i].b/255.f, colors[i].a/255.f};
// TODO: Investigate a potential bug on AMD drivers in Windows/Linux
@@ -478,10 +486,11 @@ void Graphics::clear(const std::vector<Colorf> &colors)
glClearBufferfv(GL_COLOR, i, c);
else
{
bufs.push_back(GL_COLOR_ATTACHMENT0 + i);
glDrawBuffer(GL_COLOR_ATTACHMENT0 + i);
glClearColor(c[0], c[1], c[2], c[3]);
glClear(GL_COLOR_BUFFER_BIT);
drawbuffermodified = true;
}
}
@@ -489,8 +498,13 @@ void Graphics::clear(const std::vector<Colorf> &colors)
// Revert to the expected draw buffers once we're done, if glClearBuffer
// wasn't supported.
if (!(GLAD_ES_VERSION_3_0 || GLAD_VERSION_3_0))
if (drawbuffermodified)
{
std::vector<GLenum> bufs;
for (int i = 0; i < (int) states.back().canvases.size(); i++)
bufs.push_back(GL_COLOR_ATTACHMENT0 + i);
if (bufs.size() > 1)
glDrawBuffers((int) bufs.size(), &bufs[0]);
else