7 Commits

Author	SHA1	Message	Date
Elias Naur	504664e014	gpu: saturate instead of overflowing depth buffer ... Use greater-than-or-equal test and saturate the z depth buffer when more than 65k objects are drawn. Fixes gio#127 Signed-off-by: Elias Naur <mail@eliasnaur.com>	2020-06-08 16:28:56 +02:00
Elias Naur	7fba3bb8fe	gpu/backend: remove clear color and depth state ... Specifying the clear color and depth at the time of clearing is less error prone and a better for modern GPU APIs. As a bonus, we can get rid of the BufferAttachment type. Signed-off-by: Elias Naur <mail@eliasnaur.com>	2020-03-15 12:25:56 +01:00
Elias Naur	3043c4243a	gpu/backend: add support for GLSL 1.50 ... Apple's OpenGL 3.2 Core implementation doesn't accept 1.30. Signed-off-by: Elias Naur <mail@eliasnaur.com>	2020-02-27 21:22:59 +01:00
Elias Naur	dd6a247326	gpu/backend: add support for desktop OpenGL 3 ... In particular, add the GLSL 1.30 shader variant. Sigh. Signed-off-by: Elias Naur <mail@eliasnaur.com>	2020-02-27 21:22:59 +01:00
Elias Naur	29d36e11ee	gpu/shaders: use correct type for integer vector ... OpenGL supports casting from int to float during vertex array reading. Direct3D doesn't. Since we're transpiling from GLSL, we can't directly use the Direct3D builtin "asint". So that leaves using "ivec2" instead of vec2. Signed-off-by: Elias Naur <mail@eliasnaur.com>	2020-02-27 21:22:59 +01:00
Elias Naur	0d266c413d	gpu,gpu/backend: implement GLSL 300 es shader variants ... Signed-off-by: Elias Naur <mail@eliasnaur.com>	2020-02-27 20:34:58 +01:00
Elias Naur	5cd5d49108	gpu/backend: move backend interface types to a separate package ... Signed-off-by: Elias Naur <mail@eliasnaur.com>	2020-02-27 20:34:22 +01:00