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Use vertex color alpha to draw translucently

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This commit is contained in:
Benau 2022-09-16 11:15:36 +08:00
parent a36276811e
commit 53351257fc
1 changed files with 18 additions and 10 deletions
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28
src/graphics/2dutils.cpp
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@ -357,11 +357,23 @@ void draw2DImage(const video::ITexture* texture,
bool use_alpha_channel_of_texture, bool use_alpha_channel_of_texture,
bool draw_translucently, float rotation) bool draw_translucently, float rotation)
{ {
video::SColor translucence[4] =
{
(unsigned)-1, (unsigned)-1, (unsigned)-1, (unsigned)-1
};
for (unsigned i = 0; i < 4; i++)
{
if (colors)
translucence[i] = colors[i];
if (draw_translucently)
translucence[i].setAlpha(128);
}
if (!CVS->isGLSL()) if (!CVS->isGLSL())
{ {
irr_driver->getVideoDriver()->draw2DImage(texture, destRect, sourceRect, irr_driver->getVideoDriver()->draw2DImage(texture, destRect, sourceRect,
clip_rect, colors, clip_rect, draw_translucently ? translucence : colors,
use_alpha_channel_of_texture); use_alpha_channel_of_texture);
return; return;
} }
@ -373,12 +385,7 @@ void draw2DImage(const video::ITexture* texture,
center_pos_x, center_pos_y, tex_width, tex_height, center_pos_x, center_pos_y, tex_width, tex_height,
tex_center_pos_x, tex_center_pos_y); tex_center_pos_x, tex_center_pos_y);
if (draw_translucently) if (use_alpha_channel_of_texture)
{
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE);
}
else if (use_alpha_channel_of_texture)
{ {
glEnable(GL_BLEND); glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
@ -399,9 +406,10 @@ void draw2DImage(const video::ITexture* texture,
(s32)render_target_size.Height - clip_rect->LowerRightCorner.Y, (s32)render_target_size.Height - clip_rect->LowerRightCorner.Y,
clip_rect->getWidth(), clip_rect->getHeight()); clip_rect->getWidth(), clip_rect->getHeight());
} }
if (colors) if (draw_translucently || colors)
{ {
drawTexColoredQuad(texture, colors, width, height, center_pos_x, drawTexColoredQuad(texture, draw_translucently ? translucence : colors,
width, height, center_pos_x,
center_pos_y, tex_center_pos_x, tex_center_pos_y, center_pos_y, tex_center_pos_x, tex_center_pos_y,
tex_width, tex_height, rotation); tex_width, tex_height, rotation);
} }