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add clear_mark to clear only selected channels in the framebuffer

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This commit is contained in:
omigamedev
2019-07-20 14:37:59 +02:00
parent 4b73647c98
commit 02fda636ab
2 changed files with 28 additions and 8 deletions
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35
src/rtt.cpp
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@@ -98,16 +98,18 @@ void RTT::copy(const RTT & source)
{
App::I->render_task([&]
{
glGetIntegerv(GL_DRAW_FRAMEBUFFER_BINDING, &oldDFboID);
glGetIntegerv(GL_READ_FRAMEBUFFER_BINDING, &oldRFboID);
GLint old_draw = 0;
GLint old_read = 0;
glGetIntegerv(GL_DRAW_FRAMEBUFFER_BINDING, &old_draw);
glGetIntegerv(GL_READ_FRAMEBUFFER_BINDING, &old_read);
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, fboID);
glBindFramebuffer(GL_READ_FRAMEBUFFER, source.fboID);
glBlitFramebuffer(0, 0, source.w, source.h, 0, 0, w, h,
GL_COLOR_BUFFER_BIT, GL_LINEAR);
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, oldDFboID);
glBindFramebuffer(GL_READ_FRAMEBUFFER, oldRFboID);
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, old_draw);
glBindFramebuffer(GL_READ_FRAMEBUFFER, old_read);
});
}
@@ -117,16 +119,18 @@ void RTT::copy(const RTT& source, const glm::vec4& rect)
{
auto r = rect_intersection(rect, { 0, 0, w, h });
glGetIntegerv(GL_DRAW_FRAMEBUFFER_BINDING, &oldDFboID);
glGetIntegerv(GL_READ_FRAMEBUFFER_BINDING, &oldRFboID);
GLint old_draw = 0;
GLint old_read = 0;
glGetIntegerv(GL_DRAW_FRAMEBUFFER_BINDING, &old_draw);
glGetIntegerv(GL_READ_FRAMEBUFFER_BINDING, &old_read);
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, fboID);
glBindFramebuffer(GL_READ_FRAMEBUFFER, source.fboID);
glBlitFramebuffer(r.x, r.y, r.z, r.w, r.x, r.y, r.z, r.w,
GL_COLOR_BUFFER_BIT, GL_NEAREST);
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, oldDFboID);
glBindFramebuffer(GL_READ_FRAMEBUFFER, oldRFboID);
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, old_draw);
glBindFramebuffer(GL_READ_FRAMEBUFFER, old_read);
});
}
@@ -251,6 +255,21 @@ void RTT::clear(glm::vec4 color)
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
}
void RTT::clear_mask(glm::bool4 mask, glm::vec4 color)
{
// save old state
std::array<GLboolean, 4> old_mask;
glGetBooleanv(GL_COLOR_WRITEMASK, std::data(old_mask));
// clear with mask
glColorMask(mask.r, mask.g, mask.b, mask.a);
glClearColor(color.r, color.g, color.b, color.a);
glClear(GL_COLOR_BUFFER_BIT);
// restore old state
glColorMask(old_mask[0], old_mask[1], old_mask[2], old_mask[3]);
}
glm::ivec4 RTT::calc_bounds()
{
auto data = std::unique_ptr<glm::u8vec4[]>(reinterpret_cast<glm::u8vec4*>(readTextureData()));