LOVE/love
1
0
Fork 0
mirror of https://github.com/love2d/love.git synced 2026-08-18 03:34:23 +02:00
Code Issues Packages Projects Releases Wiki Activity

Added SpriteBatch:setDrawRange(start, count) and SpriteBatch:getDrawRange.

Browse Source 
--HG--
branch : minor
This commit is contained in:
Alex Szpakowski
2016-09-21 20:03:39 -03:00
parent 7ab76b1ef6
commit 25376ba310
4 changed files with 81 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/modules/graphics/opengl/SpriteBatch.cpp
+38 -1
View File
@@ -48,6 +48,8 @@ SpriteBatch::SpriteBatch(Texture *texture, int size, Mesh::Usage usage)
, color(0)
, array_buf(nullptr)
, quad_indices(size)
, range_start(-1)
, range_count(-1)
{
if (size <= 0)
throw love::Exception("Invalid SpriteBatch size.");
@@ -223,6 +225,30 @@ void SpriteBatch::attachAttribute(const std::string &name, Mesh *mesh)
attached_attributes[name] = newattrib;
}
void SpriteBatch::setDrawRange(int start, int count)
{
if (start < 0 || count <= 0)
throw love::Exception("Invalid draw range.");
range_start = start;
range_count = count;
}
void SpriteBatch::setDrawRange()
{
range_start = range_count = -1;
}
bool SpriteBatch::getDrawRange(int &start, int &count) const
{
if (range_start < 0 || range_count <= 0)
return false;
start = range_start;
count = range_count;
return true;
}
void SpriteBatch::draw(float x, float y, float angle, float sx, float sy, float ox, float oy, float kx, float ky)
{
const size_t pos_offset = offsetof(Vertex, x);
@@ -279,8 +305,19 @@ void SpriteBatch::draw(float x, float y, float angle, float sx, float sy, float
gl.prepareDraw();
int start = std::min(std::max(0, range_start), next - 1);
int count = next;
if (range_count > 0)
count = std::min(count, range_count);
count = std::min(count, next - start);
GLBuffer::Bind element_bind(*quad_indices.getBuffer());
gl.drawElements(GL_TRIANGLES, (GLsizei) quad_indices.getIndexCount(next), quad_indices.getType(), quad_indices.getPointer(0));
const void *indices = quad_indices.getPointer(start * quad_indices.getElementSize());
if (count > 0)
gl.drawElements(GL_TRIANGLES, (GLsizei) quad_indices.getIndexCount(count), quad_indices.getType(), indices);
}
void SpriteBatch::addv(const Vertex *v, const Matrix3 &m, int index)