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* rhi: Make the new direct buffer update available for non-uniform buffersLaszlo Agocs2020-10-121-2/+4
| | | | | | | | | | | | | | | | | The original restriction to UniformBuffer was due to the GL backend where there is no GL buffer object for QRhiBuffers with usage UniformBuffer. However, we can still implement this for cases when there is a true GL buffer object underneath. With other backends it should all work as-is already. This becomes useful when one has buffers with usage Vertex that need full updates every frame. (f.ex. instance data) Unfortunately this involves renaming the function. But while at it, add an autotest case as well. Change-Id: Iff59e4509a8bae06654cc92fe8428bd79eb012fb Reviewed-by: Andy Nichols <andy.nichols@qt.io>
* rhi: gl: vk: Pre-calculate the flags for dyn.offsetLaszlo Agocs2020-10-111-0/+1
| | | | | | | ...instead of doing a loop in setShaderResources() just for this. Change-Id: Iac8d4517783967c6b8bca4926cceca918f7dcdec Reviewed-by: Andy Nichols <andy.nichols@qt.io>
* rhi: gl: d3d: Reduce the size of the Command structLaszlo Agocs2020-10-111-2/+3
| | | | | | | Copied by value so the size matters. Change-Id: I17eae99212801a4fb390a0e298b361123644d17d Reviewed-by: Andy Nichols <andy.nichols@qt.io>
* rhi: Add support for full, direct buffer updatesLaszlo Agocs2020-10-111-0/+1
| | | | | Change-Id: I02c1f8c32c08d39cde9845d20ba8b02541d9d325 Reviewed-by: Andy Nichols <andy.nichols@qt.io>
* rhi: gl: Drop the unused WRAP_R memberLaszlo Agocs2020-10-081-2/+0
| | | | | | | | If we do not use it for anything, do not spend time on comparing and copying it either. Change-Id: I3632792847010e5b73c48eb1ca88f5806f3ccd45 Reviewed-by: Andy Nichols <andy.nichols@qt.io>
* rhi: gl: Best uniform is no uniformLaszlo Agocs2020-10-021-0/+9
| | | | | | | | | | | | | | | | | Artificial tests with tens of thousands of meshes drawn with the same program (graphics pipeline) and almost the same uniform values (the difference being in the normal and model and view matrices) do benefit - strongly depending on the GL implementation probably - from doing fewer glUniformNf[v] calls. Building on the fact that uniform location values will typically be an int value starting at 0 (not guaranteed of course, we just skip the smartness in that case), we can dedicate a small 16K block to keep track of float/vec3/vec3/vec4 values in the graphics and compute pipeline objects. Change-Id: I217c31ccdeb511b3e8b8286078d7fbde399c8e3b Reviewed-by: Andy Nichols <andy.nichols@qt.io>
* rhi: Make per-frame flags per-pass where appropriateLaszlo Agocs2020-10-021-2/+7
| | | | | | | | | | | | | | | | | | | | ExternalContentsInPass becomes a per-pass flag now. Why is this beneficial? Because while Qt Quick has no choice for its render pass, not being able to guess if the application wants to do some native rendering in there, Quick 3D's render passes, all the ones that are under Quick3D's control, do not have native rendering from the application in them, and so using secondary command buffers with Vulkan is not necessary. Introduce something similar for compute and OpenGL. By knowing that none of the resources used in a pass are used with a compute pass (e.g. because we know that there are no compute passes at all) a small amount of time can be saved by skipping tracking buffers and textures because the only purpose of said tracking is to generate barriers that are relevant only to compute. Change-Id: I0eceb4774d87803c73a39db527f5707a9f4d75c1 Reviewed-by: Andy Nichols <andy.nichols@qt.io>
* rhi: gl: Attempt to reduce superfluous texture unit bindingsLaszlo Agocs2020-10-021-1/+9
| | | | | Change-Id: Iccfbe5fe8688245a5ff3f7d46a173638b362a3c8 Reviewed-by: Andy Nichols <andy.nichols@qt.io>
* rhi: Manage buffer data without QBALaszlo Agocs2020-09-301-0/+6
| | | | | | | | Use a simple and straightforward container that only does what we need here. Change-Id: I1a81b53a58bc91d533e3d7df5471a1362046825d Reviewed-by: Andy Nichols <andy.nichols@qt.io>
* rhi: Switch command lists to QVLALaszlo Agocs2020-09-251-1/+1
| | | | | Change-Id: Ic163533eee973f0ee2f3e2efe25390caa57dd659 Reviewed-by: Paul Olav Tvete <paul.tvete@qt.io>
* rhi: gl: d3d: Do not use QByteArray where there is no pointLaszlo Agocs2020-09-251-1/+1
| | | | | | | | | The real benefit in practice is getting rid of profilers going wild about QByteArray::begin() and similar. The actual perf. gain is fairly small. Change-Id: I25e4c762f303b41f0aaf914bc62751f3265d3cf8 Reviewed-by: Paul Olav Tvete <paul.tvete@qt.io>
* rhi: d3d: Fix dynamic offsets with multiple buffersLaszlo Agocs2020-09-231-1/+1
| | | | | | Fixes: QTBUG-86821 Change-Id: I57f86bf0f7e95b92f5b2c5fee587112ecf0fc8e6 Reviewed-by: Andy Nichols <andy.nichols@qt.io>
* Support signed integer attributes on QRHIInho Lee2020-09-211-2/+2
| | | | | | | Previous UIntAttributes feature is renamed as IntAttributes. Change-Id: I4b4a87a0eebf37291da832605f7bee8fb2d4e62b Reviewed-by: Laszlo Agocs <laszlo.agocs@qt.io>
* rhi: Expose compute threadgroup limits in ResourceLimitsLaszlo Agocs2020-09-181-0/+11
| | | | | | | | | | As OpenGL ES and Vulkan ruin the day with the spec mandated minimum value for max threads per threadgroup being only 128, clients need a way to decide if their compute shader (local_size_*) is suitable for use at run time. Change-Id: I72b4fc97032406340623add82ea4d9544ebe9fdc Reviewed-by: Andy Nichols <andy.nichols@qt.io>
* rhi: gl: Eliminate duplicate glUniform callsLaszlo Agocs2020-09-141-2/+4
| | | | | | | | | | | | | | | | This can happen when there is a uniform block in the Vulkan shader with an instance name, both in the vertex and fragment shader. The members are mapped to members of a struct uniform in GLSL since we do not use uniform buffers there. Now if there is, for example, "ubuf.opacity" both in the vertex and fragment shader reflection info, then it's still just one single uniform in the GL program, using one location. Registering it twice in our 'uniforms' list is harmless, but wasteful, since it means the uniform value will be set twice upon each setShaderResources(). Change-Id: Ib646eaec333522560d631b3b81800ef610f09319 Reviewed-by: Andy Nichols <andy.nichols@qt.io>
* rhi: gl: Fix shader cache with unstable vertex input locationsLaszlo Agocs2020-09-111-2/+5
| | | | | | Task-number: QTBUG-86531 Change-Id: I9bcd314e06662e3c6cc4204b24689d61ee6cb298 Reviewed-by: Andy Nichols <andy.nichols@qt.io>
* rhi: QRhiGles2 use proper texture target for multisampled texturesPaul Lemire2020-08-171-0/+2
| | | | | Change-Id: I6e92a66f2758599626e7bdfbb2e149bb69192479 Reviewed-by: Laszlo Agocs <laszlo.agocs@qt.io>
* Switch to qvla where it makes sense in rhiLaszlo Agocs2020-06-301-11/+14
| | | | | | | | | For all of these we know in advance that the vast majority of usages will not exceed a certain number of elements. Also, none of these are copied or moved ever. Change-Id: I48aedf143e221dc178d661e23454d1e4fb7a271b Reviewed-by: Andy Nichols <andy.nichols@qt.io>
* Use QList instead of QVector in guiJarek Kobus2020-06-291-20/+16
| | | | | | | | Applied to headers only. Source file to be changed separately. Task-number: QTBUG-84469 Change-Id: Ic08a899321eaffc46b8461aaee3dbaa4d2c727a9 Reviewed-by: Laszlo Agocs <laszlo.agocs@qt.io>
* Add RHI feature check for screen space derivativesEskil Abrahamsen Blomfeldt2020-06-121-1/+3
| | | | | | | | | | | | | | Fragment shader functions like fwidth() are useful for antialiasing distance field text in the case of perspective projections. In order to enable this as an alternative code path, we need to detect support. - OpenGL: Supported with GL_OES_standard_derivatives or GLES3 and up - Direct 3D: Supported for ps_2_x, so always supported on Direct3D 11 - Vulkan/Metal: Always supported Task-number: QTBUG-84695 Change-Id: I5e3fa8014c808a9a2d639305c5e90ec25d44655c Reviewed-by: Laszlo Agocs <laszlo.agocs@qt.io>
* rhi: Harmonize create-destroy API pattern with the rest of QtLaszlo Agocs2020-05-281-23/+23
| | | | | | | | | | For historical reasons we use build and release instead of create and destroy. This becomes confusing now that more modules in Qt start taking QRhi into use. Migrate to the more familiar naming, so those who have used QWindow or QOpenGLContext before will find it natural. Change-Id: I05eb2243ce274c59b03a5f8bcbb2792a4f37120f Reviewed-by: Eirik Aavitsland <eirik.aavitsland@qt.io>
* QRhiVertexInputAttribute : Add unsigned int formats for vertex inputInho Lee2020-05-271-1/+3
| | | | | | Task-number: QTBUG-83173 Change-Id: I640cd1fe74227d2cc96672d6c7aaac93e1930bcd Reviewed-by: Laszlo Agocs <laszlo.agocs@qt.io>
* RHI: facilitate compressed atlas textures in gles2 backendEirik Aavitsland2020-05-221-0/+1
| | | | | | | | | | | | | | | Since glCompressedTexImage2D() does not allow zero data, it could not be executed during texture build. Instead it would be done during the first subresource upload. This made atlasing clumsy, since one had to introduce a fake upload of the full texture size before the subtexture uploads. This commits lets the gles2 backend deal with that instead. Introduces the UsedAsCompressedAtlas QRhiTexture::Flag for opting in to this behavior. Task-number: QTBUG-78582 Change-Id: Ib6e4ea637c62cc8a51bd9a4a06e59882f335f2a7 Reviewed-by: Laszlo Agocs <laszlo.agocs@qt.io>
* rhi: Add backing format hint to QRhiRenderBufferLaszlo Agocs2020-04-291-2/+4
| | | | | | Task-number: QTBUG-83707 Change-Id: I63548f4ace70af614a2aa082663bb3ae9fbedc25 Reviewed-by: Paul Olav Tvete <paul.tvete@qt.io>
* rhi: gl: Reduce state changesLaszlo Agocs2020-03-201-1/+86
| | | | | | | | | | | | | | | | | | | | | ...between setGraphicsPipeline() calls with different QRhiGraphicsPipeline instances within the same pass. Also adds similar logic for the GL_ARRAY_BUFFER (vertex buffers) as that is a hotspot as well. This is not intended to be a 100% avoiding any redundant call solution, but rather to take care of the most common hotspots, so that bad OpenGL implementations with a larger API call overhead will not cause us to regress compared to the direct OpenGL rendering path in Quick and Quick3D. What we have here reduces the number of GL calls in the view3d example by ~200 within one frame, which is a pretty good start. Task-number: QTBUG-78603 Change-Id: I6aeab9c1c43b148ea6ef05d0284990a996c7ba28 Reviewed-by: Andy Nichols <andy.nichols@qt.io>
* rhi: Allow querying the native buffer objects behind a QRhiBufferLaszlo Agocs2020-02-211-0/+1
| | | | | | | | | | | | | Modeled after QRhiTexture's NativeTexture query. This becomes valuable in advanced cases of integrating external native rendering code with Qt Quick(3D), because it allows using (typically vertex and index) buffers created by Quick(3D) in the custom renderer as well, without having to duplicate the content by manually creating native buffers with the same vertex and index data. Change-Id: I659193345fa1dfe6221b898043f0b75ba649d296 Reviewed-by: Andy Nichols <andy.nichols@qt.io>
* rhi: Allow detecting texelFetch supportLaszlo Agocs2020-02-131-1/+3
| | | | | Change-Id: I166c89af99e1289ae60febf2f41fab07eab9f7e8 Reviewed-by: Paul Olav Tvete <paul.tvete@qt.io>
* rhi: Enable sampler address mode W in the APILaszlo Agocs2020-01-301-3/+6
| | | | | | | | | | | Internally this is already supported by all backends. The frontend was just not exposing addressW, instead defaulting to the (arbitrarily chosen) ClampToEdge. Add the parameter to newSampler(), but make it optional, defaulting to the more natural Repeat (because that's what one would get with OpenGL for WRAP_R by default) Change-Id: I0b991d8b649db37d4da86ac8e98ab7845601cf67 Reviewed-by: Christian Strømme <christian.stromme@qt.io>
* rhi: gl: vulkan: Generate barriers between dispatches in a compute passLaszlo Agocs2020-01-131-0/+11
| | | | | | | | | | | | | | | | | | | The new float16texture_with_compute manual test demonstrates a case that was not handled correctly before: multiple dispatch() calls in a row storing to and then loading from the same subresource(s). Without the appropriate barriers subtle data corruption issues appear. For Vulkan this also adds better batching for image/buffer barriers when using deferred recording. Also, for OpenGL this fixes the case of updating a buffer or rendering into a texture and then using it for load/store in a compute pass (previously this also lacked an appropriate glMemoryBarrier). Task-number: QTBUG-81217 Change-Id: I7970c445564473f9452662f4b1a20618cb8627a3 Reviewed-by: Paul Olav Tvete <paul.tvete@qt.io> Reviewed-by: Johan Helsing <johan.helsing@qt.io>
* RHI: Remove old native texture APIPaul Olav Tvete2020-01-061-3/+1
| | | | | | Task-number: QTBUG-78570 Change-Id: I8c4850828ac03319ac923a26c2e985883956c286 Reviewed-by: Laszlo Agocs <laszlo.agocs@qt.io>
* rhi: gl: Add support for arrays of float, vec2, vec3 and vec4Laszlo Agocs2019-12-121-0/+1
| | | | | | | | | | | | | This is a thing in Qt Quick: there are some types of image particles that use uniforms like "float opacitytable[64]". This should make all views work correctly in the Image Particles example when running on the OpenGL backend of QRhi. (other backends should work as expected already) Change-Id: I64a04fbb98b97d81d257b00b428582e751d46b8e Fixes: QTBUG-80667 Reviewed-by: Paul Olav Tvete <paul.tvete@qt.io>
* rhi: gl: Handle struct and array of struct uniformsLaszlo Agocs2019-12-101-1/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We have intentionally limited support for advanced things like arrays in a uniform block. There is one very common case however: a one dimensional array of a struct. Typical example for Qt Quick 3D: struct LightSource { vec4 position; ... }; layout (std140, binding = 1) uniform cbBufferLights { int uNumLights; LightSource lights[MAX_NUM_LIGHTS]; }; With GLSL (uniform blocks disabled) this gets turned into two structs where one has a 'lights' member that is an array of the other struct. Teach the OpenGL backend of QRhi how to handle this. This makes the QRhi port of Qt Quick3D functional with the OpenGL backend as well. Change-Id: I6a09b93276794f7ecdd38f5bfbd3491a9ef58146 Fixes: QTBUG-80628 Reviewed-by: Christian Strømme <christian.stromme@qt.io>
* RHI: new native texture APIPaul Olav Tvete2019-12-051-0/+2
| | | | | | | | | | | | The new version takes/returns a value that can be unpacked and passed to other functions without knowing which backend is in use. The old API will be removed in a later change when dependent modules have been updated Task-number: QTBUG-78570 Change-Id: I18d928ceef3cb617c0c509ecccb345551a7990af Reviewed-by: Laszlo Agocs <laszlo.agocs@qt.io>
* rhi: Allow testing QRhiRenderPassDescriptors for compatibilityLaszlo Agocs2019-11-271-0/+1
| | | | | | | | | | | | | | | | | | | | For Metal and Vulkan this needs actual work because that's where the concept of renderpass descriptors is relevant. GL and D3D can just return true always. The big benefit of this is that Qt Quick can now compare renderpass descriptors via isCompatible() for its pipeline cache (similarly to how it is already using isLayoutCompatible() for srbs), and so renderpass descriptors for layers (Item.layer, ShaderEffect) will typically be compatible and so can pick up pipelines created by other layers from the cache. Also add autotests for shader resource binding and renderpass descriptor compatibility. Task-number: QTBUG-80318 Change-Id: I0008bc51c4ee13b0113d2c8caf799e1257f18a18 Reviewed-by: Paul Olav Tvete <paul.tvete@qt.io>
* rhi: gl: Do not let external rendering trash our vaoLaszlo Agocs2019-10-151-0/+1
| | | | | | Task-number: QTBUG-79221 Change-Id: Ie8e6376f79c816071c12962dc054838aeaabcaa5 Reviewed-by: Paul Olav Tvete <paul.tvete@qt.io>
* rhi: gl: Add a feature flag for reading back non-zero mip levelsLaszlo Agocs2019-10-091-1/+3
| | | | | | | | | The joys of "level - Specifies the mipmap level of the texture image to be attached, which must be 0." for glFramebufferTexture2D in OpenGL ES 2.0. Change-Id: Iaf19502f48d7ba73b26abb72535bfa6696a1e182 Reviewed-by: Paul Olav Tvete <paul.tvete@qt.io>
* rhi: gl: Switch GetBufferSubData emulation to MapBufferRangeLaszlo Agocs2019-10-091-2/+2
| | | | | | | | | | | | | Use only APIs that are in GLES 3.0. glMapBuffer() is an old OES extension, stop bothering with that. Not the least because ANGLE claims supporting it and then fails the map. (not that we care much about ANGLE, but, for instance, the qrhi autotest is run with ANGLE configurations as well in the CI, so have to still take care of it for the duration of Qt 5.x) Change-Id: I29140402cedffe0430f920ee0c061673257c3aa1 Reviewed-by: Paul Olav Tvete <paul.tvete@qt.io>
* rhi: Add support for buffer readbacksLaszlo Agocs2019-10-091-2/+12
| | | | | | | | | | | | | | | | | | | | | | | | | This also marks the beginnings of significantly extending autotesting of the resource and rendering functionality in QRhi. Also involves fixing up the buffer operation lists like we did for textures before. This is to ensure updates and reads on the same batch execute in the correct order. So just have two lists: one with buffer, one with texture operations. Also simplify the struct layouts. No need for those inner structs with many duplicate members. This reduces the size even, since using a union was never an option here. Also switch to a VLA, the size is around 253 KB per batch. The Null backend now keeps track of the QRhiBuffer data so it can return valid results in readbacks. Task-number: QTBUG-78984 Task-number: QTBUG-78986 Task-number: QTBUG-78971 Task-number: QTBUG-78883 Change-Id: I9694bd7fec523a4e71cf8a5c77c828123ebbb3bd Reviewed-by: Paul Olav Tvete <paul.tvete@qt.io>
* Share and enable shader disk cache in QRhi OpenGL backendLaszlo Agocs2019-09-301-2/+12
| | | | | | | | | | | | | | | The expectation for it is to function identically to what we get with QOpenGLShaderProgram. (same environment variables, same logging categories, etc.). QOpenGLProgramBinaryCache is now shared between the QOpenGL convenience classes (like QOpenGLShaderProgram) and QRhi. To achieve more modularity and to prepare for QOpenGLShaderProgram and friends moving out of QtGui, this class cannot depend on QOpenGLShader* anymore. This involves adding some minor conversions between QRhi and QOpenGL enums for example. Change-Id: I2f4664e074823ea536281aea8006a6db159a7381 Reviewed-by: Christian Strømme <christian.stromme@qt.io>
* rhi: gl: Pick up context lossLaszlo Agocs2019-09-131-1/+2
| | | | | | | | ...and change the return value of makeThreadLocalNativeContextCurrent() to a bool since we expect this to mirror QOpenGLContext::makeCurrent(). Change-Id: I339507152e461fe28fcf7fe777165e6d0072f055 Reviewed-by: Christian Strømme <christian.stromme@qt.io>
* rhi: Better handling of device lossLaszlo Agocs2019-09-121-0/+1
| | | | | | | Starting with D3D11. The other backends will follow later. Change-Id: I4f165c9f1743df0fb00bdce1e898917575bf5f6e Reviewed-by: Christian Strømme <christian.stromme@qt.io>
* rhi: gl, metal, d3d: Reuse shader objects when source is the sameLaszlo Agocs2019-09-091-0/+3
| | | | | | | | | | | | | | | | | | Now that Qt Quick's batch renderer misses one level of shader source caching due to the nature of pipeline state objects, it can be useful to keep and reuse shader objects when the hash of the source code matches. The goal here is to allow Qt Quick to be on par with what the direct OpenGL path has when it comes to caching shader sources and compilation results. The program binary disk cache is not in scope in this patch. Also adds QRhi::releaseCachedResources(), similarly to what the scenegraph has. This can be called to clear caches such as the shader object cache we keep here. Change-Id: Ie3d81d823f61fa65ec814439e882c498f7774d43 Reviewed-by: Christian Strømme <christian.stromme@qt.io>
* rhi: vulkan: Introduce secondary command buffer usageLaszlo Agocs2019-08-291-2/+2
| | | | | | | | | | | As an option. Must opt in via setting ExternalContentsInPass in the flags for beginFrame(). It is somewhat unfortunate to require declaring this up front, but forcing using secondary command buffers always, even though beginExternal() may not be used in many applications, would be an overkill. Change-Id: I8d52bcab40c96f89f140c4c7877b6c459925e3c7 Reviewed-by: Andy Nichols <andy.nichols@qt.io>
* rhi: Attempt to fix up the logic around beginExternal()Laszlo Agocs2019-08-291-8/+5
| | | | | | | | | | | | | | | | | | | | | | | | | Mainly for Vulkan where it lacked the recording of the still queued commands. Uncovered by Qt Quick examples that integrate custom Vulkan rendering. This still has an issue that needs to be tackled separately. (we probably will switch to using a dedicated secondary command buffer with RENDER_PASS_CONTINUE_BIT for the external commands, and then just have a vkCmdExecuteCommands in our own queue instead of recording everything in beginExternal). The possibility of losing glMemoryBarrier() calls due to begin/endExternal() with the OpenGL backend is fixed too. The logic here mirrors Vulkan to some extent except that we do not have a concept of (and so the trouble with) renderpass instances. Clean up around the implementations of finish() as well. Attempting to share code via a "flushCommandBuffer" function is admirable but is not worth it since some semantics are different. (finish() cannot be called within a begin/endPass, unlike begin/endExternal). Change-Id: I5137db598d6a40d484e53678f5c919abf750d9ed Reviewed-by: Andy Nichols <andy.nichols@qt.io>
* rhi: gl: remove useless npot checksLaszlo Agocs2019-08-141-5/+2
| | | | | | | | | | | | | | | Adjusting the size is not very useful on its own. Leave it to Qt Quick or whoever provides the data to scale the source image data as they see fit. This is also more in line with other backends. While we are at it, update the feature flag documentation. It applies both to the repeat wrap mode and filtering modes other than nearest and linear (i.e. mipmapping). Change-Id: Ie28f1436b862335efeac042dc21e09189f46e626 Reviewed-by: Christian Strømme <christian.stromme@qt.io>
* rhi: Avoid generating gl errors in ES 2.0 contextsLaszlo Agocs2019-08-141-0/+1
| | | | | | | | ...due to setting the unsupported texture compare mode. This keeps wasm happy (gl errors show up in the console there). Change-Id: I5de8bce8e793c709272f3df499d2320c7b07ff71 Reviewed-by: Christian Strømme <christian.stromme@qt.io>
* rhi: gl: Add support for computeLaszlo Agocs2019-07-311-31/+117
| | | | | | | ...and storage buffers and images. Change-Id: If38a51322e3187088a13cf4e9b88cb40c8af8621 Reviewed-by: Andy Nichols <andy.nichols@qt.io>
* rhi: Improve base vertex/instance supportLaszlo Agocs2019-07-011-1/+6
| | | | | | | | | Have feature flags as appropriate. OpenGL is causing a mess here but let's support what we can since some of this will become relevant in more sophisticated mesh drawing cases with 3D in particular. Change-Id: Idfa7b4642ec87147978e03d78d6233efbd151491 Reviewed-by: Lars Knoll <lars.knoll@qt.io>
* rhi: gl: Add support for instanced drawingLaszlo Agocs2019-07-011-1/+6
| | | | | | | ...when having a 3.3+ or ES 3.0+ context. Change-Id: Ie92815263e190912d8f0b7b92ae6da55e062af05 Reviewed-by: Lars Knoll <lars.knoll@qt.io>
* rhi: gl: Adjust texture and renderbuffer sizes automaticallyLaszlo Agocs2019-07-011-0/+1
| | | | | | | | | | | | | | | | | | | | | Enforce the maximum texture size limit both for textures and renderbuffers, showing warnings and adjusting the size automatically. On the low end ES 2.0 devices we can easily hit a maximum size of 2048x2048. For example a Raspberry Pi running in full HD with the Controls 2 Material style breaks right away as it tries to create slightly wider than 2048 texture for its ShaderEffect. Instead of breaking with an obscure framebuffer incomplete warning at best, show something more informative and adjust the sizes so that something shows up on the screen still. (naturally applications not taking the maximum sizes returned from QRhi into account are technically incorrect and may well end up with incorrect rendering, but we should still try handling this as gracefully as possible) Change-Id: Ib75eb893ab4774e1a3c49ed2d14c6bf9be8c807a Reviewed-by: Lars Knoll <lars.knoll@qt.io>
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