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glgsg: Support floating-point FBOs in OpenGL ES 2+

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See issue #1296
This commit is contained in:
rdb 2022-05-05 10:40:22 +02:00
parent d98f966693
commit d2fc682fd7
2 changed files with 60 additions and 1 deletions
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53
panda/src/glstuff/glGraphicsBuffer_src.cxx
View File

@ -861,6 +861,50 @@ bind_slot(int layer, bool rb_resize, Texture **attach, RenderTexturePlane slot,
// case RTP_stencil: gl_format = GL_STENCIL_INDEX8; break
default:
if (_fb_properties.get_alpha_bits() == 0) {
#ifndef OPENGLES_1
if (_fb_properties.get_float_color() &&
glgsg->has_extension("GL_EXT_color_buffer_float")) {
// This extension supports the full range of floating-point formats.
if (_fb_properties.get_color_bits() > 16 * 3 ||
_fb_properties.get_red_bits() > 16 ||
_fb_properties.get_green_bits() > 16 ||
_fb_properties.get_blue_bits() > 16) {
// 32-bit, which is always floating-point.
if (_fb_properties.get_blue_bits() > 0 ||
_fb_properties.get_color_bits() == 1 ||
_fb_properties.get_color_bits() > 32 * 2) {
gl_format = GL_RGB32F;
} else if (_fb_properties.get_green_bits() > 0 ||
_fb_properties.get_color_bits() > 32) {
gl_format = GL_RG32F;
} else {
gl_format = GL_R32F;
}
} else {
// 16-bit floating-point.
if (_fb_properties.get_blue_bits() > 10 ||
_fb_properties.get_color_bits() == 1 ||
_fb_properties.get_color_bits() > 32) {
gl_format = GL_RGB16F;
} else if (_fb_properties.get_blue_bits() > 0) {
if (_fb_properties.get_red_bits() > 11 ||
_fb_properties.get_green_bits() > 11) {
gl_format = GL_RGB16F;
} else {
gl_format = GL_R11F_G11F_B10F;
}
} else if (_fb_properties.get_green_bits() > 0 ||
_fb_properties.get_color_bits() > 16) {
gl_format = GL_RG16F;
} else {
gl_format = GL_R16F;
}
}
} else if (_fb_properties.get_float_color() &&
glgsg->has_extension("GL_EXT_color_buffer_half_float")) {
gl_format = GL_RGB16F_EXT;
} else
#endif
if (_fb_properties.get_color_bits() <= 16) {
gl_format = GL_RGB565_OES;
} else if (_fb_properties.get_color_bits() <= 24) {
@ -868,6 +912,15 @@ bind_slot(int layer, bool rb_resize, Texture **attach, RenderTexturePlane slot,
} else {
gl_format = GL_RGB10_EXT;
}
#ifndef OPENGLES_1
} else if (_fb_properties.get_float_color() &&
_fb_properties.get_color_bits() > 16 * 3 &&
glgsg->has_extension("GL_EXT_color_buffer_float")) {
gl_format = GL_RGBA32F_EXT;
} else if (_fb_properties.get_float_color() &&
glgsg->has_extension("GL_EXT_color_buffer_half_float")) {
gl_format = GL_RGBA16F_EXT;
#endif
} else if (_fb_properties.get_color_bits() == 0) {
gl_format = GL_ALPHA8_EXT;
} else if (_fb_properties.get_color_bits() <= 12

8
panda/src/glstuff/glGraphicsStateGuardian_src.cxx
View File

@ -10322,9 +10322,15 @@ get_internal_image_format(Texture *tex, bool force_sized) const {
} else {
return GL_RGBA16_SNORM;
}
#elif !defined(OPENGLES_1)
case Texture::F_rgba16:
return GL_RGBA16F;
#endif // OPENGLES
#ifndef OPENGLES_1
case Texture::F_rgba32:
return GL_RGBA32F;
#endif // OPENGLES
#endif
case Texture::F_rgb:
switch (component_type) {