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gpu/internal/opengl: restore BeginFrame state in EndFrame

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To ease the integration with foreign OpenGL contexts, carefully save the
context state before rendering a frame and restore it afterwards. Gio
rendering can then be mixed with OpenGL code that expects exclusive
control over context state.

Signed-off-by: Elias Naur <mail@eliasnaur.com>
This commit is contained in:
Elias Naur
2021-06-10 20:14:32 +02:00
parent 200957f924
commit 9b5e9ae607
9 changed files with 813 additions and 188 deletions
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internal/gl/gl.go
+26 -1
View File
@@ -8,26 +8,38 @@ type (
)
const (
ACTIVE_TEXTURE = 0x84E0
ALL_BARRIER_BITS = 0xffffffff
ARRAY_BUFFER = 0x8892
ARRAY_BUFFER_BINDING = 0x8894
BACK = 0x0405
BLEND = 0xbe2
BLEND_DST_RGB = 0x80C8
BLEND_SRC_RGB = 0x80C9
BLEND_DST_ALPHA = 0x80CA
BLEND_SRC_ALPHA = 0x80CB
CLAMP_TO_EDGE = 0x812f
COLOR_ATTACHMENT0 = 0x8ce0
COLOR_BUFFER_BIT = 0x4000
COLOR_CLEAR_VALUE = 0x0C22
COMPILE_STATUS = 0x8b81
COMPUTE_SHADER = 0x91B9
DEPTH_BUFFER_BIT = 0x100
CURRENT_PROGRAM = 0x8B8D
DEPTH_ATTACHMENT = 0x8d00
DEPTH_BUFFER_BIT = 0x100
DEPTH_CLEAR_VALUE = 0x0B73
DEPTH_COMPONENT16 = 0x81a5
DEPTH_COMPONENT24 = 0x81A6
DEPTH_COMPONENT32F = 0x8CAC
DEPTH_FUNC = 0x0B74
DEPTH_TEST = 0xb71
DEPTH_WRITEMASK = 0x0B72
DRAW_FRAMEBUFFER = 0x8CA9
DST_COLOR = 0x306
DYNAMIC_DRAW = 0x88E8
DYNAMIC_READ = 0x88E9
ELEMENT_ARRAY_BUFFER = 0x8893
ELEMENT_ARRAY_BUFFER_BINDING = 0x8895
EXTENSIONS = 0x1f03
FALSE = 0
FLOAT = 0x1406
@@ -59,6 +71,7 @@ const (
R16F = 0x822d
R8 = 0x8229
READ_FRAMEBUFFER = 0x8ca8
READ_FRAMEBUFFER_BINDING = 0x8CAA
READ_ONLY = 0x88B8
READ_WRITE = 0x88BA
RED = 0x1903
@@ -71,6 +84,7 @@ const (
RGBA = 0x1908
RGBA8 = 0x8058
SHADER_STORAGE_BUFFER = 0x90D2
SHADER_STORAGE_BUFFER_BINDING = 0x90D3
SHORT = 0x1402
SRGB = 0x8c40
SRGB_ALPHA_EXT = 0x8c42
@@ -79,6 +93,7 @@ const (
STATIC_DRAW = 0x88e4
STENCIL_BUFFER_BIT = 0x00000400
TEXTURE_2D = 0xde1
TEXTURE_BINDING_2D = 0x8069
TEXTURE_MAG_FILTER = 0x2800
TEXTURE_MIN_FILTER = 0x2801
TEXTURE_WRAP_S = 0x2802
@@ -89,11 +104,21 @@ const (
TRIANGLES = 0x4
TRUE = 1
UNIFORM_BUFFER = 0x8A11
UNIFORM_BUFFER_BINDING = 0x8A28
UNPACK_ALIGNMENT = 0xcf5
UNSIGNED_BYTE = 0x1401
UNSIGNED_SHORT = 0x1403
VIEWPORT = 0x0BA2
VERSION = 0x1f02
VERTEX_ARRAY_BINDING = 0x85B5
VERTEX_SHADER = 0x8b31
VERTEX_ATTRIB_ARRAY_BUFFER_BINDING = 0x889F
VERTEX_ATTRIB_ARRAY_ENABLED = 0x8622
VERTEX_ATTRIB_ARRAY_POINTER = 0x8645
VERTEX_ATTRIB_ARRAY_NORMALIZED = 0x886A
VERTEX_ATTRIB_ARRAY_SIZE = 0x8623
VERTEX_ATTRIB_ARRAY_STRIDE = 0x8624
VERTEX_ATTRIB_ARRAY_TYPE = 0x8625
WRITE_ONLY = 0x88B9
ZERO = 0x0