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[canvas, gl] compute intermediate glsl structs' sizes according to std430

This commit is contained in:
martinfouilleul 2023-07-27 14:38:12 +02:00
parent ae862b39ba
commit 3c103eeb65
1 changed files with 61 additions and 52 deletions
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113
src/gl_canvas.c
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@ -64,53 +64,62 @@ typedef struct mg_gl_dispatch_indirect_command
////////////////////////////////////////////////////////////
//NOTE: these are just here for the sizes...
typedef struct mg_gl_segment
#define MG_GL_LAYOUT_FIRST(name, type) \
MG_GL_##name##_OFFSET = 0, \
MG_GL_##name##_SIZE = MG_GL_##type##_SIZE,
#define MG_GL_LAYOUT_NEXT(name, type, prev) \
MG_GL_##name##_OFFSET = AlignUpOnPow2(MG_GL_##prev##_OFFSET + MG_GL_##prev##_SIZE, MG_GL_##type##_ALIGN), \
MG_GL_##name##_SIZE = MG_GL_##type##_SIZE,
#define MG_GL_LAYOUT_SIZE(name, last, maxAlignType) \
MG_GL_##name##_ALIGN = AlignUpOnPow2(MG_GL_##maxAlignType##_ALIGN, MG_GL_VEC4_ALIGN), \
MG_GL_##name##_SIZE = AlignUpOnPow2(MG_GL_##last##_OFFSET + MG_GL_##last##_SIZE, MG_GL_##name##_ALIGN),
enum
{
int kind;
int pathIndex;
int config;
int windingIncrement;
vec4 box;
float hullMatrix[9];
float implicitMatrix[9];
float sign;
vec2 hullVertex;
int debugID;
MG_GL_I32_SIZE = sizeof(i32),
MG_GL_I32_ALIGN = sizeof(i32),
MG_GL_F32_SIZE = sizeof(f32),
MG_GL_F32_ALIGN = sizeof(f32),
MG_GL_VEC2_SIZE = 2*sizeof(f32),
MG_GL_VEC2_ALIGN = 2*sizeof(f32),
MG_GL_VEC3_SIZE = 4*sizeof(f32),
MG_GL_VEC3_ALIGN = 4*sizeof(f32),
MG_GL_VEC4_SIZE = 4*sizeof(f32),
MG_GL_VEC4_ALIGN = 4*sizeof(f32),
MG_GL_MAT3_SIZE = 3*3*MG_GL_VEC3_SIZE,
MG_GL_MAT3_ALIGN = MG_GL_VEC3_ALIGN,
} mg_gl_segment;
MG_GL_LAYOUT_FIRST(SEGMENT_KIND, I32)
MG_GL_LAYOUT_NEXT(SEGMENT_PATH_INDEX, I32, SEGMENT_KIND)
MG_GL_LAYOUT_NEXT(SEGMENT_CONFIG, I32, SEGMENT_PATH_INDEX)
MG_GL_LAYOUT_NEXT(SEGMENT_WINDING, I32, SEGMENT_CONFIG)
MG_GL_LAYOUT_NEXT(SEGMENT_BOX, VEC4, SEGMENT_WINDING)
MG_GL_LAYOUT_NEXT(SEGMENT_IMPLICIT_MATRIX, MAT3, SEGMENT_BOX)
MG_GL_LAYOUT_NEXT(SEGMENT_HULL_VERTEX, VEC2, SEGMENT_IMPLICIT_MATRIX)
MG_GL_LAYOUT_NEXT(SEGMENT_SIGN, F32, SEGMENT_HULL_VERTEX)
MG_GL_LAYOUT_SIZE(SEGMENT, SEGMENT_SIGN, MAT3)
typedef struct mg_gl_path_queue
{
vec4 area;
int tileQueues;
u8 pad[12];
} mg_gl_path_queue;
MG_GL_LAYOUT_FIRST(PATH_QUEUE_AREA, VEC4)
MG_GL_LAYOUT_NEXT(PATH_QUEUE_TILE_QUEUES, I32, PATH_QUEUE_AREA)
MG_GL_LAYOUT_SIZE(PATH_QUEUE, PATH_QUEUE_TILE_QUEUES, VEC4)
typedef struct mg_gl_tile_op
{
int kind;
int index;
int next;
bool crossRight;
int windingOffset;
MG_GL_LAYOUT_FIRST(TILE_OP_KIND, I32)
MG_GL_LAYOUT_NEXT(TILE_OP_NEXT, I32, TILE_OP_KIND)
MG_GL_LAYOUT_NEXT(TILE_OP_INDEX, I32, TILE_OP_NEXT)
MG_GL_LAYOUT_NEXT(TILE_OP_WINDING, I32, TILE_OP_INDEX)
MG_GL_LAYOUT_SIZE(TILE_OP, TILE_OP_WINDING, I32)
} mg_gl_tile_op;
MG_GL_LAYOUT_FIRST(TILE_QUEUE_WINDING, I32)
MG_GL_LAYOUT_NEXT(TILE_QUEUE_FIRST, I32, TILE_QUEUE_WINDING)
MG_GL_LAYOUT_NEXT(TILE_QUEUE_LAST, I32, TILE_QUEUE_FIRST)
MG_GL_LAYOUT_SIZE(TILE_QUEUE, TILE_QUEUE_LAST, I32)
typedef struct mg_gl_tile_queue
{
int windingOffset;
int first;
int last;
} mg_gl_tile_queue;
typedef struct mg_gl_screen_tile
{
u32 tileCoord[2];
i32 first;
u8 padding[4];
} mg_gl_screen_tile;
////////////////////////////////////////////////////////////
MG_GL_LAYOUT_FIRST(SCREEN_TILE_COORD, VEC2)
MG_GL_LAYOUT_NEXT(SCREEN_TILE_FIRST, I32, SCREEN_TILE_COORD)
MG_GL_LAYOUT_SIZE(SCREEN_TILE, SCREEN_TILE_FIRST, VEC2)
};
enum {
MG_GL_INPUT_BUFFERS_COUNT = 3,
@ -1055,11 +1064,11 @@ void mg_gl_render_batch(mg_gl_canvas_backend* backend,
//NOTE: update intermediate buffers size if needed
//TODO: compute correct sizes
mg_gl_grow_buffer_if_needed(backend->pathQueueBuffer, pathCount * sizeof(mg_gl_path_queue), "path queues");
mg_gl_grow_buffer_if_needed(backend->tileQueueBuffer, backend->maxTileQueueCount * sizeof(mg_gl_tile_queue), "tile queues");
mg_gl_grow_buffer_if_needed(backend->segmentBuffer, backend->maxSegmentCount * sizeof(mg_gl_segment), "segments");
mg_gl_grow_buffer_if_needed(backend->screenTilesBuffer, nTilesX * nTilesY * sizeof(mg_gl_screen_tile), "screen tiles");
mg_gl_grow_buffer_if_needed(backend->tileOpBuffer, backend->maxSegmentCount * 30 * sizeof(mg_gl_tile_op), "tile ops");
mg_gl_grow_buffer_if_needed(backend->pathQueueBuffer, pathCount * MG_GL_PATH_QUEUE_SIZE, "path queues");
mg_gl_grow_buffer_if_needed(backend->tileQueueBuffer, backend->maxTileQueueCount * MG_GL_TILE_QUEUE_SIZE, "tile queues");
mg_gl_grow_buffer_if_needed(backend->segmentBuffer, backend->maxSegmentCount * MG_GL_SEGMENT_SIZE, "segments");
mg_gl_grow_buffer_if_needed(backend->screenTilesBuffer, nTilesX * nTilesY * MG_GL_SCREEN_TILE_SIZE, "screen tiles");
mg_gl_grow_buffer_if_needed(backend->tileOpBuffer, backend->maxSegmentCount * 30 * MG_GL_TILE_OP_SIZE, "tile ops");
//NOTE: make the buffers visible to gl
glBindBuffer(GL_SHADER_STORAGE_BUFFER, pathBuffer);
@ -1301,7 +1310,7 @@ void mg_gl_canvas_resize(mg_gl_canvas_backend* backend, vec2 size)
int nTilesY = (int)(size.y + tileSize - 1)/tileSize;
glBindBuffer(GL_SHADER_STORAGE_BUFFER, backend->screenTilesBuffer);
glBufferData(GL_SHADER_STORAGE_BUFFER, nTilesX*nTilesY*sizeof(mg_gl_screen_tile), 0, GL_DYNAMIC_COPY);
glBufferData(GL_SHADER_STORAGE_BUFFER, nTilesX*nTilesY*MG_GL_SCREEN_TILE_SIZE, 0, GL_DYNAMIC_COPY);
if(backend->outTexture)
{
@ -1617,10 +1626,10 @@ int mg_gl_canvas_compile_render_program_named(const char* progName,
const u32 MG_GL_PATH_BUFFER_SIZE = (4<<10)*sizeof(mg_gl_path),
MG_GL_ELEMENT_BUFFER_SIZE = (4<<12)*sizeof(mg_gl_path_elt),
MG_GL_SEGMENT_BUFFER_SIZE = (4<<10)*sizeof(mg_gl_segment),
MG_GL_PATH_QUEUE_BUFFER_SIZE = (4<<10)*sizeof(mg_gl_path_queue),
MG_GL_TILE_QUEUE_BUFFER_SIZE = (4<<10)*sizeof(mg_gl_tile_queue),
MG_GL_TILE_OP_BUFFER_SIZE = (4<<20)*sizeof(mg_gl_tile_op);
MG_GL_SEGMENT_BUFFER_SIZE = (4<<10)*MG_GL_SEGMENT_SIZE,
MG_GL_PATH_QUEUE_BUFFER_SIZE = (4<<10)*MG_GL_PATH_QUEUE_SIZE,
MG_GL_TILE_QUEUE_BUFFER_SIZE = (4<<10)*MG_GL_TILE_QUEUE_SIZE,
MG_GL_TILE_OP_BUFFER_SIZE = (4<<20)*MG_GL_TILE_OP_SIZE;
mg_canvas_backend* gl_canvas_backend_create(mg_wgl_surface* surface)
{
@ -1733,7 +1742,7 @@ mg_canvas_backend* gl_canvas_backend_create(mg_wgl_surface* surface)
glGenBuffers(1, &backend->screenTilesBuffer);
glBindBuffer(GL_SHADER_STORAGE_BUFFER, backend->screenTilesBuffer);
glBufferData(GL_SHADER_STORAGE_BUFFER, nTilesX*nTilesY*sizeof(mg_gl_screen_tile), 0, GL_DYNAMIC_COPY);
glBufferData(GL_SHADER_STORAGE_BUFFER, nTilesX*nTilesY*MG_GL_SCREEN_TILE_SIZE, 0, GL_DYNAMIC_COPY);
glGenBuffers(1, &backend->rasterDispatchBuffer);
glBindBuffer(GL_SHADER_STORAGE_BUFFER, backend->rasterDispatchBuffer);