122 lines
5.1 KiB
C
122 lines
5.1 KiB
C
#ifndef RENDERBACKEND_C_H
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#define RENDERBACKEND_C_H
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#include <stdbool.h>
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#include <stdint.h>
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#ifdef _WIN32
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#define OAK_RENDER_BACKEND_EXPORT extern "C" __declspec(dllexport)
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#else
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#define OAK_RENDER_BACKEND_EXPORT \
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extern "C" __attribute__((visibility("default")))
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* Opaque pointer to the backend-owned C++ renderer object. */
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typedef void *OakRenderBackendHandle;
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/* Identifies the concrete backend behind a dynamically loaded library. */
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enum OakRenderBackendKind {
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OAK_RENDER_BACKEND_UNKNOWN = 0,
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OAK_RENDER_BACKEND_OPENGL = 1,
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OAK_RENDER_BACKEND_VULKAN = 2
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};
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/* Capability bits advertised by a backend through oak_renderer_get_info(). */
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enum OakRenderBackendCapability {
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OAK_RENDER_BACKEND_CAP_TEXTURES = 1ULL << 0,
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OAK_RENDER_BACKEND_CAP_SHADERS = 1ULL << 1,
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OAK_RENDER_BACKEND_CAP_BLIT = 1ULL << 2,
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OAK_RENDER_BACKEND_CAP_READBACK = 1ULL << 3,
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OAK_RENDER_BACKEND_CAP_VIEWER_CONTEXT = 1ULL << 4,
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OAK_RENDER_BACKEND_CAP_INSTANCE = 1ULL << 5,
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OAK_RENDER_BACKEND_CAP_DEVICE = 1ULL << 6
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};
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/* Static and runtime metadata returned by the backend. */
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struct OakRenderBackendInfo {
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uint32_t abi_version;
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uint32_t kind;
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uint64_t capabilities;
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const char *name;
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const char *status;
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};
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/* Creates a backend renderer object. */
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typedef OakRenderBackendHandle (*OakBackendCreateFn)(void *parent);
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/* Destroys a backend renderer object created by OakBackendCreateFn. */
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typedef void (*OakBackendDestroyFn)(OakRenderBackendHandle handle);
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/* Queries backend metadata and capability bits. */
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typedef bool (*OakBackendGetInfoFn)(OakRenderBackendHandle handle,
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struct OakRenderBackendInfo *out_info);
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/* Checks whether the backend can run on the current machine. */
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typedef bool (*OakBackendIsAvailableFn)(OakRenderBackendHandle handle);
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/* Initializes backend-owned device/context resources. */
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typedef bool (*OakBackendInitFn)(OakRenderBackendHandle handle);
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/* Initializes the backend against a caller-supplied GL context when applicable. */
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typedef void (*OakBackendInitWithContextFn)(OakRenderBackendHandle handle,
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void *context);
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/* Runs backend post-initialization after the device/context exists. */
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typedef void (*OakBackendPostInitFn)(OakRenderBackendHandle handle);
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/* Runs backend post-destroy cleanup before the library unloads. */
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typedef void (*OakBackendPostDestroyFn)(OakRenderBackendHandle handle);
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/* Destroys renderer-owned native resources. */
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typedef void (*OakBackendDestroyInternalFn)(OakRenderBackendHandle handle);
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/* Clears a texture destination or implicit output target. */
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typedef void (*OakBackendClearDestinationFn)(OakRenderBackendHandle handle,
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void *texture, double r, double g,
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double b, double a);
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/* Creates a native texture and writes a QVariant-compatible handle. */
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typedef void (*OakBackendCreateNativeTextureFn)(
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OakRenderBackendHandle handle, int width, int height, int depth, int format,
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int channel_count, const void *data, int linesize, void *out_variant);
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/* Destroys a native texture represented by a QVariant-compatible handle. */
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typedef void (*OakBackendDestroyNativeTextureFn)(OakRenderBackendHandle handle,
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const void *variant);
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/* Creates a native shader and writes a QVariant-compatible handle. */
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typedef void (*OakBackendCreateNativeShaderFn)(OakRenderBackendHandle handle,
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const void *shader_code,
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void *out_variant);
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/* Destroys a native shader represented by a QVariant-compatible handle. */
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typedef void (*OakBackendDestroyNativeShaderFn)(OakRenderBackendHandle handle,
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const void *variant);
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/* Uploads CPU pixel data to a native texture. */
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typedef void (*OakBackendUploadToTextureFn)(OakRenderBackendHandle handle,
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const void *variant,
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const void *video_params,
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const void *data, int linesize);
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/* Downloads native texture pixels into caller-owned CPU memory. */
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typedef void (*OakBackendDownloadFromTextureFn)(OakRenderBackendHandle handle,
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const void *variant,
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const void *video_params,
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void *data, int linesize);
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/* Waits for backend work that must be visible to later operations. */
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typedef void (*OakBackendFlushFn)(OakRenderBackendHandle handle);
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/* Reads one pixel from a texture. */
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typedef void (*OakBackendGetPixelFromTextureFn)(OakRenderBackendHandle handle,
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void *texture,
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const void *point,
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void *out_color);
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/* Executes a shader blit job. */
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typedef void (*OakBackendBlitFn)(OakRenderBackendHandle handle,
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const void *shader, void *job,
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void *destination,
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const void *destination_params,
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bool clear_destination);
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/* Attaches an output texture for OFX OpenGL rendering when supported. */
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typedef void (*OakBackendAttachOutputTextureFn)(OakRenderBackendHandle handle,
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const void *texture_id);
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/* Detaches an OFX output texture when supported. */
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typedef void (*OakBackendDetachOutputTextureFn)(OakRenderBackendHandle handle);
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/* Returns the backend OpenGL context, or null for non-OpenGL backends. */
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typedef void *(*OakBackendOpenGLContextFn)(OakRenderBackendHandle handle);
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#ifdef __cplusplus
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}
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#endif
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#endif // RENDERBACKEND_C_H
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