mirror of https://github.com/bjornbytes/lovr.git
121 lines
4.0 KiB
C
121 lines
4.0 KiB
C
#include "api.h"
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#include "graphics/buffer.h"
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#include "graphics/shader.h"
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#include <stdlib.h>
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#include <string.h>
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static int l_lovrShaderBlockGetType(lua_State* L) {
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ShaderBlock* block = luax_checktype(L, 1, ShaderBlock);
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luax_pushenum(L, BlockTypes, lovrShaderBlockGetType(block));
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return 1;
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}
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static int l_lovrShaderBlockGetSize(lua_State* L) {
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ShaderBlock* block = luax_checktype(L, 1, ShaderBlock);
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Buffer* buffer = lovrShaderBlockGetBuffer(block);
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lua_pushinteger(L, lovrBufferGetSize(buffer));
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return 1;
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}
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static int l_lovrShaderBlockGetOffset(lua_State* L) {
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ShaderBlock* block = luax_checktype(L, 1, ShaderBlock);
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const char* field = luaL_checkstring(L, 2);
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const Uniform* uniform = lovrShaderBlockGetUniform(block, field);
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lua_pushinteger(L, uniform->offset);
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return 1;
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}
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static int l_lovrShaderBlockSend(lua_State* L) {
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ShaderBlock* block = luax_checktype(L, 1, ShaderBlock);
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if (lua_type(L, 2) == LUA_TSTRING) {
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const char* name = luaL_checkstring(L, 2);
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const Uniform* uniform = lovrShaderBlockGetUniform(block, name);
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lovrAssert(uniform, "Unknown uniform for ShaderBlock '%s'", name);
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Buffer* buffer = lovrShaderBlockGetBuffer(block);
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uint8_t* data = lovrBufferMap(buffer, uniform->offset);
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luax_checkuniform(L, 3, uniform, data, name);
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lovrBufferFlush(buffer, uniform->offset, uniform->size);
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return 0;
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} else {
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Blob* blob = luax_checktype(L, 2, Blob);
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Buffer* buffer = lovrShaderBlockGetBuffer(block);
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void* data = lovrBufferMap(buffer, 0);
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size_t bufferSize = lovrBufferGetSize(buffer);
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size_t copySize = MIN(bufferSize, blob->size);
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memcpy(data, blob->data, copySize);
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lovrBufferFlush(buffer, 0, copySize);
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lua_pushinteger(L, copySize);
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return 1;
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}
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}
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static int l_lovrShaderBlockRead(lua_State* L) {
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ShaderBlock* block = luax_checktype(L, 1, ShaderBlock);
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const char* name = luaL_checkstring(L, 2);
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const Uniform* uniform = lovrShaderBlockGetUniform(block, name);
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lovrAssert(uniform, "Unknown uniform for ShaderBlock '%s'", name);
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Buffer* buffer = lovrShaderBlockGetBuffer(block);
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lovrAssert(lovrBufferIsReadable(buffer), "ShaderBlock:read requires the ShaderBlock to be created with the readable flag");
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union { float* floats; int* ints; } data = { .floats = lovrBufferMap(buffer, uniform->offset) };
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int components = uniform->components;
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if (uniform->type == UNIFORM_MATRIX) {
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components *= components;
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}
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lua_createtable(L, uniform->count, 0);
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for (int i = 0; i < uniform->count; i++) {
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if (components == 1) {
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switch (uniform->type) {
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case UNIFORM_FLOAT:
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lua_pushnumber(L, data.floats[i]);
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lua_rawseti(L, -2, i + 1);
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break;
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case UNIFORM_INT:
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lua_pushinteger(L, data.ints[i]);
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lua_rawseti(L, -2, i + 1);
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break;
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default: break;
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}
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} else {
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lua_createtable(L, components, 0);
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for (int j = 0; j < components; j++) {
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switch (uniform->type) {
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case UNIFORM_FLOAT:
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case UNIFORM_MATRIX:
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lua_pushnumber(L, data.floats[i * components + j]);
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lua_rawseti(L, -2, j + 1);
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break;
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case UNIFORM_INT:
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lua_pushinteger(L, data.ints[i * components + j]);
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lua_rawseti(L, -2, j + 1);
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break;
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default: break;
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}
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}
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lua_rawseti(L, -2, i + 1);
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}
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}
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return 1;
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}
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static int l_lovrShaderBlockGetShaderCode(lua_State* L) {
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ShaderBlock* block = luax_checktype(L, 1, ShaderBlock);
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const char* blockName = luaL_checkstring(L, 2);
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size_t length;
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char* code = lovrShaderBlockGetShaderCode(block, blockName, &length);
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lua_pushlstring(L, code, length);
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free(code);
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return 1;
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}
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const luaL_Reg lovrShaderBlock[] = {
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{ "getType", l_lovrShaderBlockGetType },
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{ "getSize", l_lovrShaderBlockGetSize },
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{ "getOffset", l_lovrShaderBlockGetOffset },
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{ "read", l_lovrShaderBlockRead },
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{ "send", l_lovrShaderBlockSend },
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{ "getShaderCode", l_lovrShaderBlockGetShaderCode },
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{ NULL, NULL }
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};
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